From ea248697de5724edb30541a7b7ec1364b1c290ba Mon Sep 17 00:00:00 2001 From: Aleksander Nowodzinski Date: Tue, 7 Nov 2017 17:18:21 +0100 Subject: [PATCH 1/8] Migrated UI components from SASS to PostCSS. Added theme support. --- build-config.js | 5 +++ build/ckeditor.js | 2 +- build/ckeditor.js.map | 2 +- package.json | 8 +++-- postcss.config.js | 35 ++++++++++++++++++++ sample/index.html | 7 +++- themeimporter.js | 77 +++++++++++++++++++++++++++++++++++++++++++ webpack.config.js | 16 ++++++--- 8 files changed, 141 insertions(+), 11 deletions(-) create mode 100644 postcss.config.js create mode 100644 themeimporter.js diff --git a/build-config.js b/build-config.js index 2e9194f4b5..172b20c5aa 100644 --- a/build-config.js +++ b/build-config.js @@ -54,6 +54,11 @@ module.exports = { image: { toolbar: [ 'imageStyleFull', 'imageStyleSide', '|', 'imageTextAlternative' ] + }, + + cloudServices: { + tokenUrl: 'http://token-endpoint', + additionalOption: 'some-value' } } }; diff --git a/build/ckeditor.js b/build/ckeditor.js index 0c79a0eadb..4fc194aa55 100644 --- a/build/ckeditor.js +++ b/build/ckeditor.js @@ -2,5 +2,5 @@ * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. 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c(o.a.fromJSON(e.position,t),a,e.baseVersion)}}t.a=c},function(e,t,a){'use strict';var n=a(97),o=a(135),i=a(137),r=a(139),s=a(398),l=a(90);t.a=function(e,t,a){var d=-1,c=o.a,m=e.length,u=!0,p=[],g=p;if(a)u=!1,c=i.a;else if(m>=200){var f=t?null:Object(s.a)(e);if(f)return Object(l.a)(f);u=!1,c=r.a,g=new n.a}else g=t?[]:p;outer:for(;++d{this._listener.fire('_keydown:'+Object(o.a)(t),t)})}set(e,t,a={}){const n=Object(o.d)(e),i=a.priority;this._listener.listenTo(this._listener,'_keydown:'+n,(e,a)=>{t(a,()=>{a.preventDefault(),a.stopPropagation(),e.stop()}),e.return=!0},{priority:i})}press(e){return!!this._listener.fire('_keydown:'+Object(o.a)(e),e)}destroy(){this._listener.stopListening()}}},function(e,t,a){'use strict';t.a=function(){return new d};var n=a(71),o=a(259),i=a(92),r=a(47),s=a(94),l=a(0);class d{constructor(){this._dispatchers=[],this._from=null}for(...e){return this._dispatchers=e,this}fromElement(e){return 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t=u._normalizeQueryPath(e.inside),a=this._extensionChains.get(e.name).map((e)=>this._getItem(e));if(!this._getItem(e.name)._checkRequiredAttributes(e.attributes))return!1;for(const n of e.attributes)for(const e of a)if(e._hasMatchingPath('disallow',t,n))return!1;for(const n of e.attributes){if(n&&s.a._isStoreAttributeKey(n))continue;let e=!1;for(const o of a)if(o._hasMatchingPath('allow',t,n)){e=!0;break}if(!e)return!1}return!0}hasItem(e){return this._items.has(e)}registerItem(e,t){if(this.hasItem(e))throw new m.b('model-schema-item-exists: Item with specified name already exists in schema.');if(!!t&&!this.hasItem(t))throw new m.b('model-schema-no-item: Item with specified name does not exist in schema.');this._items.set(e,new p(this));const a=this.hasItem(t)?this._extensionChains.get(t).concat(e):[e];this._extensionChains.set(e,a)}itemExtends(e,t){if(!this.hasItem(e)||!this.hasItem(t))throw new m.b('model-schema-no-item: Item with specified name does not exist in schema.');const a=this._extensionChains.get(e);return a.some((e)=>e==t)}checkAttributeInSelection(e,t){if(e.isCollapsed)return this.check({name:'$text',inside:e.getFirstPosition(),attributes:t});else{const a=e.getRanges();for(const e of a)for(const a of e){const e=a.item.name||'$text',n=Array.from(a.item.getAttributeKeys()).concat(t);if(this.check({name:e,inside:a.previousPosition,attributes:n}))return!0}}return!1}getValidRanges(e,t){const a=[];for(const n of e){let e=n.start,i=n.start;const s=n.end;for(const s of n.getWalker()){const n=s.item.name||'$text',l=o.a.createBefore(s.item);this.check({name:n,inside:l,attributes:t})||(!i.isEqual(e)&&a.push(new r.a(i,e)),i=s.nextPosition),e=s.nextPosition}i&&!i.isEqual(s)&&a.push(new r.a(i,s))}return a}getLimitElement(e){let t=Array.from(e.getRanges()).reduce((e,t)=>e?e.getCommonAncestor(t.getCommonAncestor()):t.getCommonAncestor(),null);for(;!this.limits.has(t.name)&&t.parent;)t=t.parent;return t}removeDisallowedAttributes(e,t,a){for(const n of e){const e=n.is('text')?'$text':n.name,o=Array.from(n.getAttributeKeys()),i=u._normalizeQueryPath(t);if(!this.check({name:e,attributes:o,inside:i}))for(const t of n.getAttributeKeys())this.check({name:e,attributes:t,inside:i})||(a?a.removeAttribute(n,t):n.removeAttribute(t));n.is('element')&&this.removeDisallowedAttributes(n.getChildren(),i.concat(n.name),a)}}_getItem(e){if(!this.hasItem(e))throw new m.b('model-schema-no-item: Item with specified name does not exist in schema.');return this._items.get(e)}static _normalizeQueryPath(e){let t=[];if(Object(d.a)(e))for(const a of e)a instanceof i.a?t.push(a.name):Object(c.a)(a)&&t.push(a);else if(e instanceof o.a){for(let a=e.parent;null!==a;)t.push(a.name),a=a.parent;t.reverse()}else Object(c.a)(e)&&(t=e.split(' '));return t}}t.a=u;class p{constructor(e){this._schema=e,this._allowed=[],this._disallowed=[],this._requiredAttributes=[]}allow(e,t){this._addPath('_allowed',e,t)}disallow(e,t){this._addPath('_disallowed',e,t)}requireAttributes(e){this._requiredAttributes.push(e)}toJSON(){const e=Object(l.a)(this);return e._schema='[model.Schema]',e}_addPath(e,t,a){t=t.slice(),Object(d.a)(a)||(a=[a]);for(const n of a)this[e].push({path:t,attribute:n})}_getPaths(e,t){const a='allow'===e?this._allowed:this._disallowed,n=[];for(const o of a)o.attribute===t&&n.push(o.path);return n}_checkRequiredAttributes(e){let t=!0;for(const a of this._requiredAttributes){t=!0;for(const n of a)if(-1==e.indexOf(n)){t=!1;break}if(t)break}return t}_hasMatchingPath(e,t,a){const o=this._getPaths(e,a);for(const i of o)if(n(this._schema,t,i))return!0;return!1}}},function(e,t,a){'use strict';var n=a(151),o=a(1),i=a(3),r=a(8),s=a(0),l=a(4);class d{constructor(){this._markers=new Map}[Symbol.iterator](){return this._markers.values()}has(e){return this._markers.has(e)}get(e){return this._markers.get(e)||null}set(e,t){const a=e instanceof c?e.name:e,o=this._markers.get(a);if(o){const e=o.getRange();if(e.isEqual(t))return o;this.remove(a)}const i=n.a.createFromRange(t),r=new c(a,i);return this._markers.set(a,r),this.fire('add:'+a,r),r}remove(e){const t=e instanceof c?e.name:e,a=this._markers.get(t);return!!a&&(this._markers.delete(t),this.fire('remove:'+t,a),this._destroyMarker(a),!0)}*getMarkersAtPosition(e){for(const t of this)t.getRange().containsPosition(e)&&(yield t)}destroy(){for(const e of this._markers.values())this._destroyMarker(e);this._markers=null,this.stopListening()}*getMarkersGroup(e){for(const t of this._markers.values())t.name.startsWith(e+':')&&(yield t)}_destroyMarker(e){e.stopListening(),e._liveRange.detach(),e._liveRange=null}}t.a=d,Object(l.a)(d,r.c);class c{constructor(e,t){this.name=e,this._liveRange=t,this._liveRange.delegate('change:range').to(this),this._liveRange.delegate('change:content').to(this)}getStart(){if(!this._liveRange)throw new s.b('marker-destroyed: Cannot use a destroyed marker instance.');return o.a.createFromPosition(this._liveRange.start)}getEnd(){if(!this._liveRange)throw new s.b('marker-destroyed: Cannot use a destroyed marker instance.');return o.a.createFromPosition(this._liveRange.end)}getRange(){if(!this._liveRange)throw new s.b('marker-destroyed: Cannot use a destroyed marker instance.');return i.a.createFromRange(this._liveRange)}}Object(l.a)(c,r.c)},function(e,t,a){'use strict';var n=a(50);class o extends n.a{constructor(e){super(),this.editor=e}set(e,t,a={}){if('string'==typeof t){const e=t;t=(t,a)=>{this.editor.execute(e),a()}}super.set(e,t,a)}}t.a=o},function(e,t,a){'use strict';var n=a(410),o=a(163),i=a(176),r=a(71),s=a(424),l=a(259),d=a(12),c=a(4);class m{constructor(e){this.model=e,this.view=new n.a,this.mapper=new o.a,this.modelToView=new i.a(this.model,{mapper:this.mapper,viewSelection:this.view.selection}),this.listenTo(this.model,'change',(e,t,a)=>{this.modelToView.convertChange(t,a)},{priority:'low'}),this.listenTo(this.model,'changesDone',()=>{const e=this.model.selection;this.modelToView.convertSelection(e),this.view.render()},{priority:'low'}),this.listenTo(this.model.markers,'add',(e,t)=>{this.modelToView.convertMarker('addMarker',t.name,t.getRange())}),this.listenTo(this.model.markers,'remove',(e,t)=>{this.modelToView.convertMarker('removeMarker',t.name,t.getRange())}),this.listenTo(this.view,'selectionChange',Object(s.a)(this.model,this.mapper)),this.modelToView.on('insert:$text',Object(r.f)(),{priority:'lowest'}),this.modelToView.on('remove',Object(r.h)(),{priority:'low'}),this.modelToView.on('selection',Object(l.a)(),{priority:'low'}),this.modelToView.on('selection',Object(l.b)(),{priority:'low'}),this.modelToView.on('selection',Object(l.d)(),{priority:'low'}),this.modelToView.on('selection',Object(l.c)(),{priority:'low'})}createRoot(e,t='main'){const a=this.view.createRoot(e,t),n=this.model.getRoot(t);return this.mapper.bindElements(n,a),a}destroy(){this.view.destroy(),this.stopListening()}}t.a=m,Object(c.a)(m,d.a)},function(e,t,a){'use strict';var n=a(111),o=a(411),i=a(153),r=a(253),s=a(74),l=a(94),d=a(16),c=a(254),m=a(417),u=a(419),p=a(420),g=a(421),f=a(4),h=a(12),b=a(422);class _{constructor(){this.domRoots=new Map,this.selection=new n.a,this.domConverter=new i.a,this.roots=new Map,this.set('isReadOnly',!1),this.set('isFocused',!1),this.renderer=new o.a(this.domConverter,this.selection),this.renderer.bind('isFocused').to(this),this._observers=new Map,this.addObserver(c.a),this.addObserver(m.a),this.addObserver(u.a),this.addObserver(p.a),this.addObserver(g.a),Object(s.f)(this),Object(l.b)(this),this.decorate('render')}addObserver(e){let t=this._observers.get(e);if(t)return t;t=new e(this),this._observers.set(e,t);for(const[a,n]of this.domRoots)t.observe(n,a);return t.enable(),t}getObserver(e){return this._observers.get(e)}createRoot(e,t='main'){const a='string'==typeof e?e:e.tagName,n=new r.a(a.toLowerCase(),t);return n.document=this,this.roots.set(t,n),n.on('change:children',(e,t)=>this.renderer.markToSync('children',t)),n.on('change:attributes',(e,t)=>this.renderer.markToSync('attributes',t)),n.on('change:text',(e,t)=>this.renderer.markToSync('text',t)),this.domConverter.isElement(e)&&this.attachDomRoot(e,t),n}attachDomRoot(e,t='main'){const a=this.getRoot(t);this.domRoots.set(t,e),this.domConverter.bindElements(e,a),this.renderer.markToSync('children',a),this.renderer.domDocuments.add(e.ownerDocument);for(const a of this._observers.values())a.observe(e,t)}getRoot(e='main'){return this.roots.get(e)}getDomRoot(e='main'){return this.domRoots.get(e)}render(){this.disableObservers(),this.renderer.render(),this.enableObservers()}focus(){if(!this.isFocused){const e=this.selection.editableElement;e?(this.domConverter.focus(e),this.render()):d.a.warn('view-focus-no-selection: There is no selection in any editable to focus.')}}scrollToTheSelection(){const e=this.selection.getFirstRange();e&&Object(b.a)({target:this.domConverter.viewRangeToDom(e),viewportOffset:20})}disableObservers(){for(const e of this._observers.values())e.disable()}enableObservers(){for(const e of this._observers.values())e.enable()}destroy(){for(const e of this._observers.values())e.destroy()}}t.a=_,Object(f.a)(_,h.a)},function(e,t,a){'use strict';var n=a(35),o=a(22),i=a(74),r=a(4),s=a(251),l=a(412),d=a(413),c=a(16),m=a(12),u=a(0);class p{constructor(e,t){this.domDocuments=new Set,this.domConverter=e,this.markedAttributes=new Set,this.markedChildren=new Set,this.markedTexts=new Set,this.selection=t,this._inlineFiller=null,this.isFocused=!1,this._fakeSelectionContainer=null}markToSync(e,t){if('text'===e)this.domConverter.mapViewToDom(t.parent)&&this.markedTexts.add(t);else{if(!this.domConverter.mapViewToDom(t))return;if('attributes'===e)this.markedAttributes.add(t);else if('children'===e)this.markedChildren.add(t);else throw new u.b('view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.')}}render(){let e;this._inlineFiller&&!this._isSelectionInInlineFiller()&&this._removeInlineFiller(),this._inlineFiller?e=this._getInlineFillerPosition():this._needsInlineFillerAtSelection()&&(e=this.selection.getFirstPosition(),this.markedChildren.add(e.parent));for(const t of this.markedTexts)!this.markedChildren.has(t.parent)&&this.domConverter.mapViewToDom(t.parent)&&this._updateText(t,{inlineFillerPosition:e});for(const e of this.markedAttributes)this._updateAttrs(e);for(const t of this.markedChildren)this._updateChildren(t,{inlineFillerPosition:e});if(e){const t=this.domConverter.viewPositionToDom(e),a=t.parent.ownerDocument;this._inlineFiller=Object(i.i)(t.parent)?t.parent:this._addInlineFiller(a,t.parent,t.offset)}else this._inlineFiller=null;this._updateSelection(),this._updateFocus(),this.markedTexts.clear(),this.markedAttributes.clear(),this.markedChildren.clear()}_addInlineFiller(e,t,a){const n=t instanceof Array?t:t.childNodes,o=n[a];if(this.domConverter.isText(o))return o.data=i.b+o.data,o;else{const o=e.createTextNode(i.b);return Array.isArray(t)?n.splice(a,0,o):Object(l.a)(t,a,o),o}}_getInlineFillerPosition(){const e=this.selection.getFirstPosition();return e.parent.is('text')?o.a.createBefore(this.selection.getFirstPosition().parent):e}_isSelectionInInlineFiller(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const e=this.selection.getFirstPosition(),t=this.domConverter.viewPositionToDom(e);return t&&this.domConverter.isText(t.parent)&&Object(i.i)(t.parent)}_removeInlineFiller(){const e=this._inlineFiller;if(!Object(i.i)(e))throw new u.b('view-renderer-filler-was-lost: The inline filler node was lost.');Object(i.h)(e)?e.parentNode.removeChild(e):e.data=e.data.substr(i.c),this._inlineFiller=null}_needsInlineFillerAtSelection(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const e=this.selection.getFirstPosition(),t=e.parent,a=e.offset;if(!this.domConverter.mapViewToDom(t.root))return!1;if(!t.is('element'))return!1;if(a===t.getFillerOffset())return!1;const o=e.nodeBefore,i=e.nodeAfter;return o instanceof n.a||i instanceof n.a?!1:!0}_updateText(e,t){const a=this.domConverter.findCorrespondingDomText(e),n=this.domConverter.viewToDom(e,a.ownerDocument),o=a.data;let r=n.data;const s=t.inlineFillerPosition;s&&s.parent==e.parent&&s.offset==e.index&&(r=i.b+r),o!=r&&(a.data=r)}_updateAttrs(e){const t=this.domConverter.mapViewToDom(e),a=Array.from(t.attributes).map((e)=>e.name),n=e.getAttributeKeys();for(const a of n)t.setAttribute(a,e.getAttribute(a));for(const n of a)e.hasAttribute(n)||t.removeAttribute(n)}_updateChildren(e,t){function a(e,t){if(e===t)return!0;return n.isText(e)&&n.isText(t)?e.data===t.data:Object(i.g)(e,n.blockFiller)&&Object(i.g)(t,n.blockFiller)}const n=this.domConverter,o=n.mapViewToDom(e);if(o){const r=o.ownerDocument,c=t.inlineFillerPosition,m=o.childNodes,u=Array.from(n.viewChildrenToDom(e,r,{bind:!0}));c&&c.parent==e&&this._addInlineFiller(r,u,c.offset);const p=Object(s.a)(m,u,a);let g=0;const i=new Set;for(const e of p)'insert'===e?(Object(l.a)(o,g,u[g]),g++):'delete'===e?(i.add(m[g]),Object(d.a)(m[g])):g++;for(const e of i)e.parentNode||this.domConverter.unbindDomElement(e)}}_updateSelection(){if(0===this.selection.rangeCount)return this._removeDomSelection(),void this._removeFakeSelection();const e=this.domConverter.mapViewToDom(this.selection.editableElement);this.isFocused&&e&&(this.selection.isFake?this._updateFakeSelection(e):(this._removeFakeSelection(),this._updateDomSelection(e)))}_updateFakeSelection(e){const t=e.ownerDocument;this._fakeSelectionContainer||(this._fakeSelectionContainer=t.createElement('div'),this._fakeSelectionContainer.style.position='fixed',this._fakeSelectionContainer.style.top=0,this._fakeSelectionContainer.style.left='-9999px',this._fakeSelectionContainer.appendChild(t.createTextNode('\xA0'))),this._fakeSelectionContainer.parentElement||e.appendChild(this._fakeSelectionContainer);const a=this.selection.fakeSelectionLabel||'\xA0';this._fakeSelectionContainer.firstChild.data=a;const n=t.getSelection();n.removeAllRanges();const o=t.createRange();o.selectNodeContents(this._fakeSelectionContainer),n.addRange(o),this.domConverter.bindFakeSelection(this._fakeSelectionContainer,this.selection)}_updateDomSelection(e){const t=e.ownerDocument.defaultView.getSelection();if(this._domSelectionNeedsUpdate(t)){const e=this.domConverter.viewPositionToDom(this.selection.anchor),a=this.domConverter.viewPositionToDom(this.selection.focus);t.collapse(e.parent,e.offset),t.extend(a.parent,a.offset)}}_domSelectionNeedsUpdate(e){if(!this.domConverter.isDomSelectionCorrect(e))return!0;const t=e&&this.domConverter.domSelectionToView(e);if(t&&this.selection.isEqual(t))return!1;if(!this.selection.isCollapsed&&this.selection.isSimilar(t)){const e={oldSelection:t,currentSelection:this.selection};return c.a.warn('renderer-skipped-selection-rendering: The selection was not rendered due to its similarity to the current one.',e),!1}return!0}_removeDomSelection(){for(const e of this.domDocuments){const t=e.getSelection();if(t.rangeCount){const t=e.activeElement,a=this.domConverter.mapDomToView(t);t&&a&&e.getSelection().removeAllRanges()}}}_removeFakeSelection(){const e=this._fakeSelectionContainer;e&&e.remove()}_updateFocus(){if(this.isFocused){const e=this.selection.editableElement;e&&this.domConverter.focus(e)}}}t.a=p,Object(r.a)(p,m.a)},function(e,t){'use strict';t.a=function(e,t,a){e.insertBefore(a,e.childNodes[t]||null)}},function(e,t){'use strict';t.a=function(e){const t=e.parentNode;t&&t.removeChild(e)}},function(e,t){'use strict';t.a=function(e){let t=0;for(;e.previousSibling;)e=e.previousSibling,t++;return t}},function(e,t,a){'use strict';t.a=function(e,t){const a=Object(n.a)(e),o=Object(n.a)(t);let r=0;for(;a[r]==o[r]&&a[r];)r++;return 0==r?null:a[r-1]};var n=a(252)},function(e,t,a){'use strict';var n=a(96);t.a=function(e,t,a){a='function'==typeof a?a:void 0;var o=a?a(e,t):void 0;return o===void 0?Object(n.a)(e,t,a):!!o}},function(e,t,a){'use strict';var n=a(61),o=a(254),i=a(16),r=a(255);class s extends n.a{constructor(e){super(e),this.mutationObserver=e.getObserver(o.a),this.document=e,this.selection=e.selection,this.domConverter=e.domConverter,this._documents=new WeakSet,this._fireSelectionChangeDoneDebounced=Object(r.a)((e)=>this.document.fire('selectionChangeDone',e),200),this._clearInfiniteLoopInterval=setInterval(()=>this._clearInfiniteLoop(),1e3),this._loopbackCounter=0}observe(e){const t=e.ownerDocument;this._documents.has(t)||(this.listenTo(t,'selectionchange',()=>{this._handleSelectionChange(t)}),this._documents.add(t))}destroy(){super.destroy(),clearInterval(this._clearInfiniteLoopInterval),this._fireSelectionChangeDoneDebounced.cancel()}_handleSelectionChange(e){if(this.isEnabled&&(this.document.isFocused||this.document.isReadOnly)){this.mutationObserver.flush();const t=e.defaultView.getSelection(),a=this.domConverter.domSelectionToView(t);if(!(this.selection.isEqual(a)&&this.domConverter.isDomSelectionCorrect(t))){if(60<++this._loopbackCounter)return void i.a.warn('selectionchange-infinite-loop: Selection change observer detected an infinite rendering loop.');if(this.selection.isSimilar(a))this.document.render();else{const 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image')}}}t.a=b,b.defaultStyles={imageStyleFull:{name:'imageStyleFull',title:'Full size image',icon:c.a,isDefault:!0},imageStyleSide:{name:'imageStyleSide',title:'Side image',icon:h.a,className:'image-style-side'},imageStyleAlignLeft:{name:'imageStyleAlignLeft',title:'Left aligned image',icon:u.a,className:'image-style-align-left'},imageStyleAlignCenter:{name:'imageStyleAlignCenter',title:'Centered image',icon:g.a,className:'image-style-align-center'},imageStyleAlignRight:{name:'imageStyleAlignRight',title:'Right aligned image',icon:h.a,className:'image-style-align-right'}},b.defaultIcons={full:c.a,left:u.a,right:h.a,center:g.a}},function(e,t,a){'use strict';var n=a(11),o=a(36);class i extends n.a{constructor(e,t){super(e),this.style=t}refresh(){const e=this.editor.document.selection.getSelectedElement();this.isEnabled=Object(o.a)(e),this.value=!!e&&(this.style.isDefault?!e.hasAttribute('imageStyle'):e.getAttribute('imageStyle')==this.style.name)}execute(e={}){if(this.value)return;const t=this.editor.document,a=t.selection.getSelectedElement();t.enqueueChanges(()=>{const n=e.batch||t.batch();n.setAttribute(a,'imageStyle',this.style.name)})}}t.a=i},function(e,t,a){'use strict';function n(e,t,a,n){const o=t.input,i=t.output;if(a.test(o,{class:e.className})&&Object(s.a)(i)){const r=[...i.getAttributeKeys(),'imageStyle'];n.schema.check({name:'image',inside:t.context,attributes:r})&&(a.consume(o,{class:e.className}),i.setAttribute('imageStyle',e.name))}}function o(e,t){for(const a of t)if(a.name===e)return a}function i(e,t,a){return t&&('changeAttribute'==e||'removeAttribute'==e)&&(a.removeClass(t.className),!0)}function r(e,t,a){return t&&('addAttribute'==e||'changeAttribute'==e)&&(a.addClass(t.className),!0)}t.a=function(e){return(t,a,n,s)=>{const l=t.name.split(':')[0],d=l+':imageStyle';if(n.test(a.item,d)){const t=o(a.attributeNewValue,e),c=o(a.attributeOldValue,e),m=s.mapper.toViewElement(a.item),u=i(l,c,m),p=r(l,t,m);(u||p)&&n.consume(a.item,d)}}},t.b=function(e){const t=e.filter((e)=>!e.isDefault);return(e,a,o,i)=>{for(const r of t)n(r,a,o,i)}};var s=a(36)},function(e){e.exports=''},function(e){e.exports=''},function(e){e.exports=''},function(e){e.exports=''},function(e,t,a){'use strict';var n=a(6),o=a(2),i=a(262),r=a(157),s=a(36),l=a(273);class d extends o.a{static get requires(){return[r.a]}static get pluginName(){return'ImageToolbar'}afterInit(){const e=this.editor,t=e.config.get('image.toolbar');t&&t.length&&(this._balloon=this.editor.plugins.get('ContextualBalloon'),this._toolbar=new i.a,n.a.extend(this._toolbar.template,{attributes:{class:'ck-editor-toolbar'}}),this._toolbar.fillFromConfig(t,e.ui.componentFactory),this.listenTo(e.editing.view,'render',()=>{this._checkIsVisible()},{priority:'low'}),this.listenTo(e.ui.focusTracker,'change:isFocused',()=>{this._checkIsVisible()},{priority:'low'}))}_checkIsVisible(){const e=this.editor;e.ui.focusTracker.isFocused?Object(s.b)(e.editing.view.selection)?this._showToolbar():this._hideToolbar():this._hideToolbar()}_showToolbar(){const e=this.editor;this._isVisible?Object(l.b)(e):!this._balloon.hasView(this._toolbar)&&this._balloon.add({view:this._toolbar,position:Object(l.a)(e),balloonClassName:'ck-toolbar-container ck-editor-toolbar-container'})}_hideToolbar(){this._isVisible&&this._balloon.remove(this._toolbar)}get _isVisible(){return this._balloon.visibleView==this._toolbar}}t.a=d},function(e,t,a){'use strict';function n(e){return e.getAncestors().find((e)=>e instanceof l.a)}var o=a(2),i=a(550),r=a(38),s=a(551),l=a(277),d=a(157),c=a(268),m=a(21),u=a(554),p=a(555),g=a.n(p),f=a(556),h=a.n(f);const b='Ctrl+K';class _ extends o.a{static get requires(){return[s.a,d.a]}static get pluginName(){return'Link'}init(){const e=this.editor;e.editing.view.addObserver(i.a),this.formView=this._createForm(),this._balloon=e.plugins.get(d.a),this._createToolbarLinkButton(),this._attachActions()}_createForm(){const e=this.editor,t=new u.a(e.locale),a=e.commands.get('link'),n=e.commands.get('unlink');return t.urlInputView.bind('value').to(a,'value'),t.urlInputView.bind('isReadOnly').to(a,'isEnabled',(e)=>!e),t.saveButtonView.bind('isEnabled').to(a),t.unlinkButtonView.bind('isEnabled').to(n),this.listenTo(t,'submit',()=>{e.execute('link',t.urlInputView.inputView.element.value),this._hidePanel(!0)}),this.listenTo(t,'unlink',()=>{e.execute('unlink'),this._hidePanel(!0)}),this.listenTo(t,'cancel',()=>this._hidePanel(!0)),t.keystrokes.set('Esc',(e,t)=>{this._hidePanel(!0),t()}),t}_createToolbarLinkButton(){const e=this.editor,a=e.commands.get('link'),n=e.t;e.keystrokes.set(b,(e,t)=>{t(),a.isEnabled&&this._showPanel(!0)}),e.ui.componentFactory.add('link',(e)=>{const t=new m.a(e);return t.isEnabled=!0,t.label=n('Link'),t.icon=g.a,t.keystroke=b,t.tooltip=!0,t.bind('isEnabled').to(a,'isEnabled'),this.listenTo(t,'execute',()=>this._showPanel(!0)),t})}_attachActions(){const e=this.editor.editing.view;this.listenTo(e,'click',()=>{const e=this._getSelectedLinkElement();e&&this._showPanel()}),this.editor.keystrokes.set('Tab',(e,t)=>{this._balloon.visibleView!==this.formView||this.formView.focusTracker.isFocused||(this.formView.focus(),t())},{priority:'high'}),this.editor.keystrokes.set('Esc',(e,t)=>{this._balloon.visibleView===this.formView&&(this._hidePanel(),t())}),Object(c.a)({emitter:this.formView,activator:()=>this._balloon.hasView(this.formView),contextElements:[this._balloon.view.element],callback:()=>this._hidePanel()})}_showPanel(e){const t=this.editor,a=t.commands.get('link'),n=t.commands.get('unlink'),o=t.editing,i=o.view,r=i.selection.isCollapsed,s=this._getSelectedLinkElement();this.formView.unlinkButtonView.isVisible=n.isEnabled,this.formView.urlInputView.inputView.element.value=a.value||'',this.listenTo(i,'render',()=>{const e=this._getSelectedLinkElement(),t=i.selection.isCollapsed;r&&!t||s!==e?this._hidePanel(!0):this._balloon.updatePosition(this._getBalloonPositionData())}),this._balloon.hasView(this.formView)?e&&this._balloon.visibleView===this.formView&&this.formView.urlInputView.select():(this._balloon.add({view:this.formView,position:this._getBalloonPositionData()}),e&&this.formView.urlInputView.select())}_hidePanel(e){this.stopListening(this.editor.editing.view,'render');this._balloon.hasView(this.formView)&&(e&&this.editor.editing.view.focus(),this.stopListening(this.editor.editing.view,'render'),this._balloon.remove(this.formView))}_getBalloonPositionData(){const e=this.editor.editing.view,t=this._getSelectedLinkElement(),a=t?e.domConverter.mapViewToDom(t):e.domConverter.viewRangeToDom(e.selection.getFirstRange());return{target:a}}_getSelectedLinkElement(){const e=this.editor.editing.view.selection;if(e.isCollapsed)return n(e.getFirstPosition());else{const t=e.getFirstRange().getTrimmed(),a=n(t.start),o=n(t.end);return a&&a==o?r.a.createIn(a).getTrimmed().isEqual(t)?a:null:null}}}t.a=_},function(e,t,a){'use strict';var n=a(75);class o extends n.a{constructor(e){super(e),this.domEventType='click'}onDomEvent(e){this.fire(e.type,e)}}t.a=o},function(e,t,a){'use strict';var n=a(2),o=a(51),i=a(43),r=a(277),s=a(552),l=a(553);class d extends n.a{init(){const e=this.editor,t=e.data,a=e.editing;e.document.schema.allow({name:'$inline',attributes:'linkHref',inside:'$block'}),e.document.schema.allow({name:'$inline',attributes:'linkHref',inside:'$clipboardHolder'}),Object(o.a)().for(t.modelToView,a.modelToView).fromAttribute('linkHref').toElement((e)=>{const t=new r.a('a',{href:e});return t.priority=5,t}),Object(i.a)().for(t.viewToModel).from({name:'a',attribute:{href:/.?/}}).toAttribute((e)=>({key:'linkHref',value:e.getAttribute('href')})),e.commands.add('link',new s.a(e)),e.commands.add('unlink',new l.a(e))}}t.a=d},function(e,t,a){'use strict';var 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a=t.isCollapsed?[Object(o.a)(t.getFirstPosition(),t.getAttribute('linkHref'))]:t.getRanges(),n=e.batch();for(const e of a)n.removeAttribute(e,'linkHref')})}}t.a=i},function(e,t,a){'use strict';var n=a(7),o=a(6),i=a(112),r=a(21),s=a(269),l=a(270),d=a(271),c=a(62),m=a(114),u=a(50);class p extends n.a{constructor(e){super(e);const a=e.t;this.focusTracker=new c.a,this.keystrokes=new u.a,this.urlInputView=this._createUrlInput(),this.saveButtonView=this._createButton(a('Save')),this.saveButtonView.type='submit',this.cancelButtonView=this._createButton(a('Cancel'),'cancel'),this.unlinkButtonView=this._createButton(a('Unlink'),'unlink'),this._focusables=new i.a,this._focusCycler=new m.a({focusables:this._focusables,focusTracker:this.focusTracker,keystrokeHandler:this.keystrokes,actions:{focusPrevious:'shift + tab',focusNext:'tab'}}),o.a.extend(this.saveButtonView.template,{attributes:{class:['ck-button-action']}}),this.template=new 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t=(e)=>(t,a)=>{const n=this.editor.commands.get(e);n.isEnabled&&(this.editor.execute(e),a())};this.editor.keystrokes.set('Tab',t('indentList')),this.editor.keystrokes.set('Shift+Tab',t('outdentList'))}_addButton(e,t,a){const n=this.editor,o=n.commands.get(e);n.ui.componentFactory.add(e,(i)=>{const r=new d.a(i);return r.set({label:t,icon:a,tooltip:!0}),r.bind('isOn','isEnabled').to(o,'value','isEnabled'),this.listenTo(r,'execute',()=>n.execute(e)),r})}}t.a=c},function(e,t,a){'use strict';function n(e){let t=1;for(const a of e.getChildren())if('ul'==a.name||'ol'==a.name)for(const e of a.getChildren())t+=n(e);return t}var o=a(560),i=a(561),r=a(2),s=a(115),l=a(562);class d extends r.a{static get requires(){return[s.a]}init(){const e=this.editor,t=e.document.schema;t.registerItem('listItem','$block'),t.allow({name:'listItem',inside:'$root',attributes:['type','indent']}),t.requireAttributes('listItem',['type','indent']);const 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a=this.editor.document,n=Array.from(a.selection.getSelectedBlocks()).filter((e)=>i(e,a.schema)),r=!0===this.value;a.enqueueChanges(()=>{const i=t.batch||a.batch();if(r){let t=n[n.length-1].nextSibling,a=e,o=[];for(;t&&'listItem'==t.name&&0!==t.getAttribute('indent');){const e=t.getAttribute('indent');e=e.getAttribute('indent');){if(a.getAttribute('indent')==e.getAttribute('indent'))return a;a=a[t?'nextSibling':'previousSibling']}return null}var i=a(11),r=a(63);class s extends i.a{constructor(e,t){super(e),this._indentBy='forward'==t?1:-1}refresh(){this.isEnabled=this._checkEnabled()}execute(){const e=this.editor.document,t=e.batch();let a=Array.from(e.selection.getSelectedBlocks());e.enqueueChanges(()=>{const e=a[a.length-1];for(let t=e.nextSibling;t&&'listItem'==t.name&&t.getAttribute('indent')>e.getAttribute('indent');)a.push(t),t=t.nextSibling;0>this._indentBy&&(a=a.reverse());for(const e of a){const 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r='numbered'==t.attributeNewValue?'ol':'ul';i=w.a.rename(i,r),s(i,i.nextSibling),s(i.previousSibling,i)},t.j=function(e,t,a,n){if(!a.consume(t.item,'remove'))return;let o=n.mapper.toViewPosition(t.sourcePosition);o=o.getLastMatchingPosition((e)=>!e.item.is('li'));const i=o.nodeAfter;w.a.breakContainer(_.a.createBefore(i)),w.a.breakContainer(_.a.createAfter(i));const r=i.parent,l=r.previousSibling,c=k.a.createOn(r);w.a.remove(c),l&&l.nextSibling&&s(l,l.nextSibling),d(t.item.getAttribute('indent')+1,t.sourcePosition,c.start,i,n.mapper),'$graveyard'==t.item.root.rootName&&n.mapper.unbindModelElement(t.item)},t.f=function(e,t,a,n){if(!a.consume(t.item,'changeAttribute:indent'))return;const o=n.mapper.toViewElement(t.item);w.a.breakContainer(_.a.createBefore(o)),w.a.breakContainer(_.a.createAfter(o));const i=o.parent,r=i.previousSibling,c=k.a.createOn(i);w.a.remove(c);let 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t)null!==a.parent&&a.remove(),a.parent=this;this._children.insertNodes(e,t)}removeChildren(e,t=1){const a=this._children.removeNodes(e,t);for(const n of a)n.parent=null;return a}toJSON(){const e=[];for(const t of this._children)e.push(t.toJSON());return e}static fromJSON(e){const t=[];for(const a of e)a.name?t.push(i.a.fromJSON(a)):t.push(r.a.fromJSON(a));return new d(t)}}t.a=d},function(e,t,a){'use strict';var n=a(67);class o{constructor(e){this.baseVersion=e}toJSON(){const e=Object(n.a)(this,!0);return e.__className=this.constructor.className,delete e.delta,e}static get className(){return'engine.model.operation.Operation'}static fromJSON(e){return new this(e.baseVersion)}}t.a=o},function(e,t,a){'use strict';var n=a(29),o=a(96);class i extends n.a{get type(){return'remove'}getReversed(){const e=this.sourcePosition._getTransformedByInsertion(this.targetPosition,this.howMany);return new o.a(this.getMovedRangeStart(),this.howMany,e,this.baseVersion+1)}static get className(){return'engine.model.operation.RemoveOperation'}}t.a=i},function(e,t){'use strict';t.a=function(e,t,a){var n=-1,o=e.length;0>t&&(t=-t>o?0:o+t),a=a>o?o:a,0>a&&(a+=o),o=t>a?0:a-t>>>0,t>>>=0;for(var i=Array(o);++n{const l=t.matcher.matchAll(n.input);if(l)for(const a of l){const l=e instanceof Function?e(n.input):new i.a(e);if(!l)continue;const c=Array.from(l.getAttributeKeys());if(!d.schema.check({name:l.name,attributes:c,inside:n.context}))continue;if(!o.consume(n.input,t.consume||a.match))continue;n.context.push(l);const m=d.convertChildren(n.input,o,n),u=r.a.createAt(l,'end');s.a.insert(u,m),n.context.pop(),n.output=l;break}}},'normal')}toAttribute(e,t){this._setCallback(function(a){return(o,i,r,s)=>{const d=a.matcher.matchAll(i.input);if(d)for(const o of d){if(!r.consume(i.input,a.consume||o.match))continue;i.output||(i.output=s.convertChildren(i.input,r,i));let d;if(!(e instanceof Function))d={key:e,value:t?t:i.input.getAttribute(a.attributeKey)};else 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t=Object(s.b)(this.position,e);return{range:t}}static get className(){return'engine.model.operation.InsertOperation'}static fromJSON(e,t){const a=[];for(const n of e.nodes)n.name?a.push(l.a.fromJSON(n)):a.push(d.a.fromJSON(n));return new c(o.a.fromJSON(e.position,t),a,e.baseVersion)}}t.a=c},function(e,t,a){'use strict';var n=a(95),o=a(133),i=a(135),r=a(137),s=a(396),d=a(88);t.a=function(e,t,a){var l=-1,c=o.a,m=e.length,u=!0,p=[],g=p;if(a)u=!1,c=i.a;else if(m>=200){var f=t?null:Object(s.a)(e);if(f)return Object(d.a)(f);u=!1,c=r.a,g=new n.a}else g=t?[]:p;outer:for(;++l{this._listener.fire('_keydown:'+Object(o.a)(t),t)})}set(e,t,a={}){const n=Object(o.d)(e),i=a.priority;this._listener.listenTo(this._listener,'_keydown:'+n,(e,a)=>{t(a,()=>{a.preventDefault(),a.stopPropagation(),e.stop()}),e.return=!0},{priority:i})}press(e){return!!this._listener.fire('_keydown:'+Object(o.a)(e),e)}destroy(){this._listener.stopListening()}}},function(e,t,a){'use strict';t.a=function(){return new l};var n=a(69),o=a(257),i=a(90),r=a(45),s=a(92),d=a(0);class l{constructor(){this._dispatchers=[],this._from=null}for(...e){return this._dispatchers=e,this}fromElement(e){return this._from={type:'element',name:e,priority:null},this}fromAttribute(e){return this._from={type:'attribute',key:e,priority:null},this}fromMarker(e){return this._from={type:'marker',name:e,priority:null},this}withPriority(e){return this._from.priority=e,this}toElement(e){const t=null===this._from.priority?'normal':this._from.priority;for(const a of this._dispatchers)if('element'==this._from.type)e='string'==typeof e?new r.a(e):e,a.on('insert:'+this._from.name,Object(n.e)(e),{priority:t});else if('attribute'==this._from.type)e='string'==typeof e?new i.a(e):e,a.on('addAttribute:'+this._from.key,Object(n.m)(e),{priority:t}),a.on('changeAttribute:'+this._from.key,Object(n.m)(e),{priority:t}),a.on('removeAttribute:'+this._from.key,Object(n.l)(e),{priority:t}),a.on('selectionAttribute:'+this._from.key,Object(o.e)(e),{priority:t});else{const t=null===this._from.priority?'normal':this._from.priority;e='string'==typeof e?new s.a(e):e,a.on('addMarker:'+this._from.name,Object(n.g)(e),{priority:t}),a.on('removeMarker:'+this._from.name,Object(n.j)(e),{priority:t})}}toHighlight(e){const t=null===this._from.priority?'normal':this._from.priority;if('marker'!=this._from.type)throw new d.b('build-model-converter-non-marker-to-highlight: Conversion to a highlight is supported only from model markers.');for(const a of 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a=0;8>a;a++)e+=t(65536*(1+Math.random())).toString(16).substring(1);return e}},function(e,t){'use strict';t.a=function(e,t){return e===t||e!==e&&t!==t}},function(e,t,a){'use strict';function n(e,t,a,n,o){return{done:!1,value:{type:e,item:t,previousPosition:a,nextPosition:n,length:o}}}var o=a(26),i=a(65),r=a(5),s=a(2),d=a(0);class l{constructor(e={}){if(!e.boundaries&&!e.startPosition)throw new d.b('model-tree-walker-no-start-position: Neither boundaries nor starting position have been defined.');const t=e.direction||'forward';if('forward'!=t&&'backward'!=t)throw new d.b('model-tree-walker-unknown-direction: Only `backward` and `forward` direction 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a=Object.getPrototypeOf;t.a=function(e){return a(Object(e))}},function(e,t,a){'use strict';var n=a(62);t.a=function(e,t,a,o){a||(a={});for(var i=-1,r=t.length;++i'string'==typeof e?new o.a(e):e))}var o=a(33),i=a(4),r=a(32),s=a(8);class d{constructor(e){this._children=[],e&&this.insertChildren(0,e)}[Symbol.iterator](){return this._children[Symbol.iterator]()}get childCount(){return this._children.length}get isEmpty(){return 0===this.childCount}get root(){return this}get parent(){return null}is(e){return'documentFragment'==e}appendChildren(e){return this.insertChildren(this.childCount,e)}getChild(e){return this._children[e]}getChildIndex(e){return this._children.indexOf(e)}getChildren(){return this._children[Symbol.iterator]()}insertChildren(e,t){this._fireChange('children',this);let a=0;t=n(t);for(const n of t)null!==n.parent&&n.remove(),n.parent=this,this._children.splice(e,0,n),e++,a++;return a}removeChildren(e,t=1){this._fireChange('children',this);for(let a=e;at?0:t,n)):[]}},function(e,t,a){'use strict';var o=a(40),i=a(13);t.a=function(e,t,a){var n=e?e.length:0;return n?(t=a||void 0===t?1:Object(i.a)(t),t=n-t,Object(o.a)(e,0,0>t?0:t)):[]}},function(e,t){'use strict';t.a=function(e){return e&&e.length?e[0]:void 0}},function(e,t,a){'use strict';var o=a(95),i=a(133),r=a(135),s=a(30),d=a(136),l=a(137);t.a=function(e,t,a){for(var c=a?r.a:i.a,m=e[0].length,u=e.length,p=u,g=Array(u),f=Infinity,h=[];p--;){var b=e[p];p&&t&&(b=Object(s.a)(b,Object(d.a)(t))),f=n(b.length,f),g[p]=!a&&(t||120<=m&&120<=b.length)?new o.a(p&&b):void 0}b=e[0];var _=-1,y=g[0];outer:for(;++_{e.has(a)&&o.call(this,a,r,i,n.range,n.sourcePosition)},{priority:'high'})}function o(e,t,a,n,o){const r=n.end.offset-n.start.offset;let s=n.start;('move'==e||'remove'==e||'reinsert'==e)&&(s=s._getTransformedByInsertion(o,r));const d=this._getTransformedByDocumentChange(e,t,s,r,o);('move'==e||'remove'==e||'reinsert'==e)&&3==d.length&&(d[2]=n);const l=i.a.createFromRanges(d),c=!l.isEqual(this),m=this.containsPosition(s),u=o&&(this.containsPosition(o)||this.start.isEqual(o));if(c){const t=i.a.createFromRange(this);this.start=l.start,this.end=l.end,this.fire('change:range',t,{type:e,batch:a,range:n,sourcePosition:o})}else(m||u)&&this.fire('change:content',i.a.createFromRange(this),{type:e,batch:a,range:n,sourcePosition:o})}var i=a(3),r=a(8),s=a(4);class d extends i.a{constructor(e,t){super(e,t),n.call(this)}detach(){this.stopListening()}}t.a=d,Object(s.a)(d,r.c)},function(e,t){'use strict';function a(e){let t=0;for(const a of e)t++;return t}t.a=a},function(e,t,a){'use strict';function n(e,t,a){let n=Object(f.a)(e);return a&&(n=n.slice(n.indexOf(a)+1)),n.some((e)=>e.tagName&&t.includes(e.tagName.toLowerCase()))}function o(e,t){for(;e&&e!=p.a.document;)t(e),e=e.parentNode}var 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p{constructor(e){this._schema=e,this._allowed=[],this._disallowed=[],this._requiredAttributes=[]}allow(e,t){this._addPath('_allowed',e,t)}disallow(e,t){this._addPath('_disallowed',e,t)}requireAttributes(e){this._requiredAttributes.push(e)}toJSON(){const e=Object(d.a)(this);return e._schema='[model.Schema]',e}_addPath(e,t,a){t=t.slice(),Object(l.a)(a)||(a=[a]);for(const n of a)this[e].push({path:t,attribute:n})}_getPaths(e,t){const a='allow'===e?this._allowed:this._disallowed,n=[];for(const o of a)o.attribute===t&&n.push(o.path);return n}_checkRequiredAttributes(e){let t=!0;for(const a of this._requiredAttributes){t=!0;for(const n of a)if(-1==e.indexOf(n)){t=!1;break}if(t)break}return t}_hasMatchingPath(e,t,a){const o=this._getPaths(e,a);for(const i of o)if(n(this._schema,t,i))return!0;return!1}}},function(e,t,a){'use strict';var n=a(149),o=a(2),i=a(3),r=a(8),s=a(0),d=a(4);class l{constructor(){this._markers=new Map}[Symbol.iterator](){return this._markers.values()}has(e){return this._markers.has(e)}get(e){return this._markers.get(e)||null}set(e,t){const a=e instanceof c?e.name:e,o=this._markers.get(a);if(o){const e=o.getRange();if(e.isEqual(t))return o;this.remove(a)}const i=n.a.createFromRange(t),r=new c(a,i);return this._markers.set(a,r),this.fire('add:'+a,r),r}remove(e){const t=e instanceof c?e.name:e,a=this._markers.get(t);return!!a&&(this._markers.delete(t),this.fire('remove:'+t,a),this._destroyMarker(a),!0)}*getMarkersAtPosition(e){for(const t of this)t.getRange().containsPosition(e)&&(yield t)}destroy(){for(const e of this._markers.values())this._destroyMarker(e);this._markers=null,this.stopListening()}*getMarkersGroup(e){for(const t of this._markers.values())t.name.startsWith(e+':')&&(yield t)}_destroyMarker(e){e.stopListening(),e._liveRange.detach(),e._liveRange=null}}t.a=l,Object(d.a)(l,r.c);class c{constructor(e,t){this.name=e,this._liveRange=t,this._liveRange.delegate('change:range').to(this),this._liveRange.delegate('change:content').to(this)}getStart(){if(!this._liveRange)throw new s.b('marker-destroyed: Cannot use a destroyed marker instance.');return o.a.createFromPosition(this._liveRange.start)}getEnd(){if(!this._liveRange)throw new s.b('marker-destroyed: Cannot use a destroyed marker instance.');return o.a.createFromPosition(this._liveRange.end)}getRange(){if(!this._liveRange)throw new s.b('marker-destroyed: Cannot use a destroyed marker instance.');return i.a.createFromRange(this._liveRange)}}Object(d.a)(c,r.c)},function(e,t,a){'use strict';var n=a(48);class o extends n.a{constructor(e){super(),this.editor=e}set(e,t,a={}){if('string'==typeof t){const e=t;t=(t,a)=>{this.editor.execute(e),a()}}super.set(e,t,a)}}t.a=o},function(e,t,a){'use strict';var n=a(408),o=a(161),i=a(174),r=a(69),s=a(422),d=a(257),l=a(11),c=a(4);class m{constructor(e){this.model=e,this.view=new n.a,this.mapper=new o.a,this.modelToView=new i.a(this.model,{mapper:this.mapper,viewSelection:this.view.selection}),this.listenTo(this.model,'change',(e,t,a)=>{this.modelToView.convertChange(t,a)},{priority:'low'}),this.listenTo(this.model,'changesDone',()=>{const e=this.model.selection;this.modelToView.convertSelection(e),this.view.render()},{priority:'low'}),this.listenTo(this.model.markers,'add',(e,t)=>{this.modelToView.convertMarker('addMarker',t.name,t.getRange())}),this.listenTo(this.model.markers,'remove',(e,t)=>{this.modelToView.convertMarker('removeMarker',t.name,t.getRange())}),this.listenTo(this.view,'selectionChange',Object(s.a)(this.model,this.mapper)),this.modelToView.on('insert:$text',Object(r.f)(),{priority:'lowest'}),this.modelToView.on('remove',Object(r.h)(),{priority:'low'}),this.modelToView.on('selection',Object(d.a)(),{priority:'low'}),this.modelToView.on('selection',Object(d.b)(),{priority:'low'}),this.modelToView.on('selection',Object(d.d)(),{priority:'low'}),this.modelToView.on('selection',Object(d.c)(),{priority:'low'})}createRoot(e,t='main'){const a=this.view.createRoot(e,t),n=this.model.getRoot(t);return this.mapper.bindElements(n,a),a}destroy(){this.view.destroy(),this.stopListening()}}t.a=m,Object(c.a)(m,l.a)},function(e,t,a){'use strict';var n=a(109),o=a(409),i=a(151),r=a(251),s=a(72),d=a(92),l=a(16),c=a(252),m=a(415),u=a(417),p=a(418),g=a(419),f=a(4),h=a(11),b=a(420);class _{constructor(){this.domRoots=new Map,this.selection=new n.a,this.domConverter=new i.a,this.roots=new Map,this.set('isReadOnly',!1),this.set('isFocused',!1),this.renderer=new o.a(this.domConverter,this.selection),this.renderer.bind('isFocused').to(this),this._observers=new Map,this.addObserver(c.a),this.addObserver(m.a),this.addObserver(u.a),this.addObserver(p.a),this.addObserver(g.a),Object(s.f)(this),Object(d.b)(this),this.decorate('render')}addObserver(e){let t=this._observers.get(e);if(t)return t;t=new e(this),this._observers.set(e,t);for(const[a,n]of this.domRoots)t.observe(n,a);return t.enable(),t}getObserver(e){return this._observers.get(e)}createRoot(e,t='main'){const a='string'==typeof e?e:e.tagName,n=new r.a(a.toLowerCase(),t);return n.document=this,this.roots.set(t,n),n.on('change:children',(e,t)=>this.renderer.markToSync('children',t)),n.on('change:attributes',(e,t)=>this.renderer.markToSync('attributes',t)),n.on('change:text',(e,t)=>this.renderer.markToSync('text',t)),this.domConverter.isElement(e)&&this.attachDomRoot(e,t),n}attachDomRoot(e,t='main'){const a=this.getRoot(t);this.domRoots.set(t,e),this.domConverter.bindElements(e,a),this.renderer.markToSync('children',a),this.renderer.domDocuments.add(e.ownerDocument);for(const a of this._observers.values())a.observe(e,t)}getRoot(e='main'){return this.roots.get(e)}getDomRoot(e='main'){return this.domRoots.get(e)}render(){this.disableObservers(),this.renderer.render(),this.enableObservers()}focus(){if(!this.isFocused){const e=this.selection.editableElement;e?(this.domConverter.focus(e),this.render()):l.a.warn('view-focus-no-selection: There is no selection in any editable to focus.')}}scrollToTheSelection(){const e=this.selection.getFirstRange();e&&Object(b.a)({target:this.domConverter.viewRangeToDom(e),viewportOffset:20})}disableObservers(){for(const e of this._observers.values())e.disable()}enableObservers(){for(const e of this._observers.values())e.enable()}destroy(){for(const e of this._observers.values())e.destroy()}}t.a=_,Object(f.a)(_,h.a)},function(e,t,a){'use strict';function n(e){if('false'==e.getAttribute('contenteditable'))return!1;const t=e.findAncestor((e)=>e.hasAttribute('contenteditable'));return!t||'true'==t.getAttribute('contenteditable')}var o=a(33),i=a(22),r=a(72),s=a(4),d=a(249),l=a(410),c=a(411),m=a(16),u=a(11),p=a(0);class g{constructor(e,t){this.domDocuments=new Set,this.domConverter=e,this.markedAttributes=new Set,this.markedChildren=new Set,this.markedTexts=new Set,this.selection=t,this._inlineFiller=null,this.isFocused=!1,this._fakeSelectionContainer=null}markToSync(e,t){if('text'===e)this.domConverter.mapViewToDom(t.parent)&&this.markedTexts.add(t);else{if(!this.domConverter.mapViewToDom(t))return;if('attributes'===e)this.markedAttributes.add(t);else if('children'===e)this.markedChildren.add(t);else throw new p.b('view-renderer-unknown-type: Unknown type passed to Renderer.markToSync.')}}render(){let e;this._inlineFiller&&!this._isSelectionInInlineFiller()&&this._removeInlineFiller(),this._inlineFiller?e=this._getInlineFillerPosition():this._needsInlineFillerAtSelection()&&(e=this.selection.getFirstPosition(),this.markedChildren.add(e.parent));for(const t of this.markedTexts)!this.markedChildren.has(t.parent)&&this.domConverter.mapViewToDom(t.parent)&&this._updateText(t,{inlineFillerPosition:e});for(const e of this.markedAttributes)this._updateAttrs(e);for(const t of this.markedChildren)this._updateChildren(t,{inlineFillerPosition:e});if(e){const t=this.domConverter.viewPositionToDom(e),a=t.parent.ownerDocument;this._inlineFiller=Object(r.i)(t.parent)?t.parent:this._addInlineFiller(a,t.parent,t.offset)}else this._inlineFiller=null;this._updateSelection(),this._updateFocus(),this.markedTexts.clear(),this.markedAttributes.clear(),this.markedChildren.clear()}_addInlineFiller(e,t,a){const n=t instanceof Array?t:t.childNodes,o=n[a];if(this.domConverter.isText(o))return o.data=r.b+o.data,o;else{const o=e.createTextNode(r.b);return Array.isArray(t)?n.splice(a,0,o):Object(l.a)(t,a,o),o}}_getInlineFillerPosition(){const e=this.selection.getFirstPosition();return e.parent.is('text')?i.a.createBefore(this.selection.getFirstPosition().parent):e}_isSelectionInInlineFiller(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const e=this.selection.getFirstPosition(),t=this.domConverter.viewPositionToDom(e);return t&&this.domConverter.isText(t.parent)&&Object(r.i)(t.parent)}_removeInlineFiller(){const e=this._inlineFiller;if(!Object(r.i)(e))throw new p.b('view-renderer-filler-was-lost: The inline filler node was lost.');Object(r.h)(e)?e.parentNode.removeChild(e):e.data=e.data.substr(r.c),this._inlineFiller=null}_needsInlineFillerAtSelection(){if(1!=this.selection.rangeCount||!this.selection.isCollapsed)return!1;const e=this.selection.getFirstPosition(),t=e.parent,a=e.offset;if(!this.domConverter.mapViewToDom(t.root))return!1;if(!t.is('element'))return!1;if(!n(t))return!1;if(a===t.getFillerOffset())return!1;const i=e.nodeBefore,r=e.nodeAfter;return i instanceof o.a||r instanceof o.a?!1:!0}_updateText(e,t){const a=this.domConverter.findCorrespondingDomText(e),n=this.domConverter.viewToDom(e,a.ownerDocument),o=a.data;let i=n.data;const s=t.inlineFillerPosition;s&&s.parent==e.parent&&s.offset==e.index&&(i=r.b+i),o!=i&&(a.data=i)}_updateAttrs(e){const t=this.domConverter.mapViewToDom(e),a=Array.from(t.attributes).map((e)=>e.name),n=e.getAttributeKeys();for(const a of n)t.setAttribute(a,e.getAttribute(a));for(const n of a)e.hasAttribute(n)||t.removeAttribute(n)}_updateChildren(e,t){function a(e,t){if(e===t)return!0;return n.isText(e)&&n.isText(t)?e.data===t.data:Object(r.g)(e,n.blockFiller)&&Object(r.g)(t,n.blockFiller)}const n=this.domConverter,o=n.mapViewToDom(e);if(o){const r=o.ownerDocument,s=t.inlineFillerPosition,m=o.childNodes,u=Array.from(n.viewChildrenToDom(e,r,{bind:!0}));s&&s.parent==e&&this._addInlineFiller(r,u,s.offset);const p=Object(d.a)(m,u,a);let g=0;const i=new Set;for(const e of p)'insert'===e?(Object(l.a)(o,g,u[g]),g++):'delete'===e?(i.add(m[g]),Object(c.a)(m[g])):g++;for(const e of i)e.parentNode||this.domConverter.unbindDomElement(e)}}_updateSelection(){if(0===this.selection.rangeCount)return this._removeDomSelection(),void this._removeFakeSelection();const e=this.domConverter.mapViewToDom(this.selection.editableElement);this.isFocused&&e&&(this.selection.isFake?this._updateFakeSelection(e):(this._removeFakeSelection(),this._updateDomSelection(e)))}_updateFakeSelection(e){const t=e.ownerDocument;this._fakeSelectionContainer||(this._fakeSelectionContainer=t.createElement('div'),this._fakeSelectionContainer.style.position='fixed',this._fakeSelectionContainer.style.top=0,this._fakeSelectionContainer.style.left='-9999px',this._fakeSelectionContainer.appendChild(t.createTextNode('\xA0'))),this._fakeSelectionContainer.parentElement||e.appendChild(this._fakeSelectionContainer);const a=this.selection.fakeSelectionLabel||'\xA0';this._fakeSelectionContainer.firstChild.data=a;const n=t.getSelection();n.removeAllRanges();const o=t.createRange();o.selectNodeContents(this._fakeSelectionContainer),n.addRange(o),this.domConverter.bindFakeSelection(this._fakeSelectionContainer,this.selection)}_updateDomSelection(e){const t=e.ownerDocument.defaultView.getSelection();if(this._domSelectionNeedsUpdate(t)){const e=this.domConverter.viewPositionToDom(this.selection.anchor),a=this.domConverter.viewPositionToDom(this.selection.focus);t.collapse(e.parent,e.offset),t.extend(a.parent,a.offset)}}_domSelectionNeedsUpdate(e){if(!this.domConverter.isDomSelectionCorrect(e))return!0;const t=e&&this.domConverter.domSelectionToView(e);if(t&&this.selection.isEqual(t))return!1;if(!this.selection.isCollapsed&&this.selection.isSimilar(t)){const e={oldSelection:t,currentSelection:this.selection};return m.a.warn('renderer-skipped-selection-rendering: The selection was not rendered due to its similarity to the current one.',e),!1}return!0}_removeDomSelection(){for(const e of this.domDocuments){const t=e.getSelection();if(t.rangeCount){const t=e.activeElement,a=this.domConverter.mapDomToView(t);t&&a&&e.getSelection().removeAllRanges()}}}_removeFakeSelection(){const e=this._fakeSelectionContainer;e&&e.remove()}_updateFocus(){if(this.isFocused){const e=this.selection.editableElement;e&&this.domConverter.focus(e)}}}t.a=g,Object(s.a)(g,u.a)},function(e,t){'use strict';t.a=function(e,t,a){e.insertBefore(a,e.childNodes[t]||null)}},function(e,t){'use strict';t.a=function(e){const t=e.parentNode;t&&t.removeChild(e)}},function(e,t){'use strict';t.a=function(e){let t=0;for(;e.previousSibling;)e=e.previousSibling,t++;return t}},function(e,t,a){'use strict';t.a=function(e,t){const a=Object(n.a)(e),o=Object(n.a)(t);let r=0;for(;a[r]==o[r]&&a[r];)r++;return 0==r?null:a[r-1]};var n=a(250)},function(e,t,a){'use strict';var n=a(94);t.a=function(e,t,a){a='function'==typeof a?a:void 0;var o=a?a(e,t):void 0;return o===void 0?Object(n.a)(e,t,a):!!o}},function(e,t,a){'use strict';var n=a(59),o=a(252),i=a(16),r=a(253);class s extends n.a{constructor(e){super(e),this.mutationObserver=e.getObserver(o.a),this.document=e,this.selection=e.selection,this.domConverter=e.domConverter,this._documents=new WeakSet,this._fireSelectionChangeDoneDebounced=Object(r.a)((e)=>this.document.fire('selectionChangeDone',e),200),this._clearInfiniteLoopInterval=setInterval(()=>this._clearInfiniteLoop(),1e3),this._loopbackCounter=0}observe(e){const t=e.ownerDocument;this._documents.has(t)||(this.listenTo(t,'selectionchange',()=>{this._handleSelectionChange(t)}),this._documents.add(t))}destroy(){super.destroy(),clearInterval(this._clearInfiniteLoopInterval),this._fireSelectionChangeDoneDebounced.cancel()}_handleSelectionChange(e){if(this.isEnabled&&(this.document.isFocused||this.document.isReadOnly)){this.mutationObserver.flush();const t=e.defaultView.getSelection(),a=this.domConverter.domSelectionToView(t);if(!(this.selection.isEqual(a)&&this.domConverter.isDomSelectionCorrect(t))){if(60<++this._loopbackCounter)return void i.a.warn('selectionchange-infinite-loop: Selection change observer detected an infinite rendering loop.');if(this.selection.isSimilar(a))this.document.render();else{const e={oldSelection:this.selection,newSelection:a,domSelection:t};this.document.fire('selectionChange',e),this._fireSelectionChangeDoneDebounced(e)}}}}_clearInfiniteLoop(){this._loopbackCounter=0}}t.a=s},function(e,t){'use strict';var a=Date.now;t.a=a},function(e,t,a){'use strict';var n=a(73);class o extends n.a{constructor(e){super(e),this.domEventType=['focus','blur'],this.useCapture=!0,e.on('focus',()=>{e.isFocused=!0,this._renderTimeoutId=setTimeout(()=>e.render(),0)}),e.on('blur',(t,a)=>{const n=e.selection.editableElement;(null===n||n===a.target)&&(e.isFocused=!1,e.render())})}onDomEvent(e){this.fire(e.type,e)}destroy(){this._renderTimeoutId&&clearTimeout(this._renderTimeoutId),super.destroy()}}t.a=o},function(e,t,a){'use strict';var n=a(73),o=a(28);class i extends n.a{constructor(e){super(e),this.domEventType=['keydown','keyup']}onDomEvent(e){this.fire(e.type,e,{keyCode:e.keyCode,altKey:e.altKey,ctrlKey:e.ctrlKey||e.metaKey,shiftKey:e.shiftKey,get keystroke(){return Object(o.a)(this)}})}}t.a=i},function(e,t,a){'use strict';function n(e){return e==r.c.arrowright||e==r.c.arrowleft||e==r.c.arrowup||e==r.c.arrowdown}var o=a(59),i=a(109),r=a(28),s=a(253);class d extends o.a{constructor(e){super(e),this._fireSelectionChangeDoneDebounced=Object(s.a)((e)=>this.document.fire('selectionChangeDone',e),200)}observe(){const e=this.document;e.on('keydown',(t,a)=>{const o=e.selection;o.isFake&&n(a.keyCode)&&this.isEnabled&&(a.preventDefault(),this._handleSelectionMove(a.keyCode))},{priority:'lowest'})}destroy(){super.destroy(),this._fireSelectionChangeDoneDebounced.cancel()}_handleSelectionMove(e){const t=this.document.selection,a=i.a.createFromSelection(t);a.setFake(!1),(e==r.c.arrowleft||e==r.c.arrowup)&&a.collapseToStart(),(e==r.c.arrowright||e==r.c.arrowdown)&&a.collapseToEnd();const n={oldSelection:t,newSelection:a,domSelection:null};this.document.fire('selectionChange',n),this._fireSelectionChangeDoneDebounced(n)}}t.a=d},function(e,t,a){'use strict';function n({target:e,viewportOffset:t=0}){const a=c(e);for(let n=a,r=null;n;){let s;s=n==a?m(e):m(r),i(s,()=>u(e,n));const d=u(e,n);o(n,d,t),n.parent==n?n=null:(r=n.frameElement,n=n.parent)}}function o(e,t,a){const n=t.clone().moveBy(0,a),o=t.clone().moveBy(0,-a),i=new g.a(e).excludeScrollbarsAndBorders();if(![o,n].every((e)=>i.contains(e))){let{scrollX:c,scrollY:m}=e;s(o,i)?m-=i.top-t.top+a:r(n,i)&&(m+=t.bottom-i.bottom+a),d(t,i)?c-=i.left-t.left+a:l(t,i)&&(c+=t.right-i.right+a),e.scrollTo(c,m)}}function i(e,t){const a=c(e);for(let n,o;e!=a.document.body;)o=t(),n=new 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o.a({tag:'ul',attributes:{class:['ck-reset','ck-list']},children:this.items}),this.items.on('add',(e,t)=>{this.focusTracker.add(t.element)}),this.items.on('remove',(e,t)=>{this.focusTracker.remove(t.element)})}init(){this.keystrokes.listenTo(this.element),super.init()}focus(){this._focusCycler.focusFirst()}focusLast(){this._focusCycler.focusLast()}}t.a=d},function(e,t,a){'use strict';var n=a(7),o=a(6),i=a(48);class r extends n.a{constructor(){super(),this.set('tabindex',-1),this.keystrokes=new i.a;const e=this.bindTemplate;this.template=new o.a({tag:'li',attributes:{class:['ck-list__item',e.to('class'),e.if('isActive','ck-list__item_active')],style:e.to('style'),tabindex:e.to('tabindex')},children:[{text:e.to('label')}],on:{click:e.to('execute')}})}init(){const e=(e,t)=>{this.fire('execute'),t()};this.keystrokes.listenTo(this.element),this.keystrokes.set('Enter',e),this.keystrokes.set('Space',e)}focus(){this.element.focus()}}t.a=r},function(e,t,a){'use strict';t.a=function(e,t){const a=new n.a(t);a.bind('label','isOn','isEnabled','withText','keystroke','tooltip').to(e);const r=new i.a(t);return new o.a(t,a,r)};var n=a(21),o=a(519),i=a(520)},function(e,t,a){'use strict';var n=a(7),o=a(6),i=a(60),r=a(48);class s extends n.a{constructor(e,t,a){super(e),o.a.extend(t.template,{attributes:{class:['ck-dropdown__button']}}),this.buttonView=t,this.panelView=a,this.set('isOpen',!1),this.focusTracker=new i.a,this.keystrokes=new r.a,this.template=new o.a({tag:'div',attributes:{class:['ck-dropdown']},children:[t,a]}),this.listenTo(t,'execute',()=>{this.isOpen=!this.isOpen}),a.bind('isVisible').to(this,'isOpen')}init(){this.keystrokes.listenTo(this.element),this.focusTracker.add(this.element);const e=(e,t)=>{this.isOpen&&(this.buttonView.focus(),this.isOpen=!1,t())};this.keystrokes.set('arrowdown',(e,t)=>{this.buttonView.isEnabled&&!this.isOpen&&(this.isOpen=!0,t())}),this.keystrokes.set('arrowright',(e,t)=>{this.isOpen&&t()}),this.keystrokes.set('arrowleft',e),this.keystrokes.set('esc',e),super.init()}focus(){this.buttonView.focus()}}t.a=s},function(e,t,a){'use strict';var n=a(7),o=a(6);class i extends n.a{constructor(e){super(e);const t=this.bindTemplate;this.set('isVisible',!1),this.children=this.createCollection(),this.template=new o.a({tag:'div',attributes:{class:['ck-reset','ck-dropdown__panel',t.if('isVisible','ck-dropdown__panel-visible')]},children:this.children,on:{selectstart:t.to((e)=>e.preventDefault())}})}}t.a=i},function(e,t,a){'use strict';var n=a(1),o=a(522);class i extends n.a{static get requires(){return[o.a]}static get pluginName(){return'ImageCaption'}}t.a=i},function(e,t,a){'use strict';function n(e,t,a,n){if('insert'===t){const e=new 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o=a.getFirstPosition(),i=r(o.parent);i&&(t=e.toViewElement(i)),t&&(t.removeClass('ck-hidden'),this._lastSelectedCaption=t)}_fixCaptionVisibility(e){const t=r(e),a=this.editor.editing.mapper;if(t){const e=a.toViewElement(t);e&&(t.childCount?e.removeClass('ck-hidden'):e.addClass('ck-hidden'))}}}t.a=_},function(e,t,a){'use strict';t.a=function(e,t){return()=>{const a=new o.a('figcaption');return a.document=e,a.setCustomProperty(s,!0),Object(i.a)(a,t),Object(r.e)(a)}},t.b=function(e){for(const t of e.getChildren())if(t instanceof n.a&&'caption'==t.name)return t;return null},t.c=function(e){const t=e.parent;return'figcaption'==e.name&&t&&'figure'==t.name&&t.hasClass('image')?{name:!0}:null};var n=a(5),o=a(89),i=a(524),r=a(154);const s=Symbol('imageCaption')},function(e,t,a){'use strict';function n(e){const t=e.document;e.removeClass('ck-placeholder'),e.removeAttribute('data-placeholder'),c.has(t)&&c.get(t).delete(e)}function o(e){const t=c.get(e);for(const[a,n]of t)i(a,n)}function 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t=this.editor,a=t.commands.get(e.name);t.ui.componentFactory.add(e.name,(n)=>{const o=new i.a(n);return o.set({label:e.title,icon:e.icon,tooltip:!0}),o.bind('isEnabled').to(a,'isEnabled'),o.bind('isOn').to(a,'value'),this.listenTo(o,'execute',()=>t.execute(e.name)),o})}}t.a=r},function(e,t,a){'use strict';function n(e){const t=b.defaultStyles,a=b.defaultIcons;if('string'==typeof e)t[e]?e=Object.assign({},t[e]):(d.a.warn('image-style-not-found: There is no such image style of given name.',{name:e}),e={name:e});else if(t[e.name]){const a=t[e.name],n=Object.assign({},e);for(const t in a)e.hasOwnProperty(t)||(n[t]=a[t]);e=n}return'string'==typeof e.icon&&a[e.icon]&&(e.icon=a[e.icon]),e}var o=a(1),i=a(527),r=a(265),s=a(528),d=a(16),l=a(529),c=a.n(l),m=a(530),u=a.n(m),p=a(531),g=a.n(p),f=a(532),h=a.n(f);class b extends o.a{static get requires(){return[r.a]}static get pluginName(){return'ImageStyleEngine'}init(){const e=this.editor,t=e.document,a=t.schema,n=e.data,o=e.editing;e.config.define('image.styles',['imageStyleFull','imageStyleSide']);const r=this.imageStyles;a.allow({name:'image',attributes:'imageStyle',inside:'$root'});const d=Object(s.a)(r);o.modelToView.on('addAttribute:imageStyle:image',d),n.modelToView.on('addAttribute:imageStyle:image',d),o.modelToView.on('changeAttribute:imageStyle:image',d),n.modelToView.on('changeAttribute:imageStyle:image',d),o.modelToView.on('removeAttribute:imageStyle:image',d),n.modelToView.on('removeAttribute:imageStyle:image',d),n.viewToModel.on('element:figure',Object(s.b)(r),{priority:'low'});for(const t of r)e.commands.add(t.name,new i.a(e,t))}get imageStyles(){if(this._cachedImageStyles)return this._cachedImageStyles;const e=[],t=this.editor,a=this.localizedDefaultStylesTitles,o=t.config.get('image.styles');for(let t of o)t=n(t),a[t.title]&&(t.title=a[t.title]),e.push(t);return this._cachedImageStyles=e}get localizedDefaultStylesTitles(){const e=this.editor.t;return{"Full size image":e('Full size image'),"Side image":e('Side image'),"Left aligned image":e('Left aligned image'),"Centered image":e('Centered image'),"Right aligned image":e('Right aligned image')}}}t.a=b,b.defaultStyles={imageStyleFull:{name:'imageStyleFull',title:'Full size image',icon:c.a,isDefault:!0},imageStyleSide:{name:'imageStyleSide',title:'Side image',icon:h.a,className:'image-style-side'},imageStyleAlignLeft:{name:'imageStyleAlignLeft',title:'Left aligned image',icon:u.a,className:'image-style-align-left'},imageStyleAlignCenter:{name:'imageStyleAlignCenter',title:'Centered image',icon:g.a,className:'image-style-align-center'},imageStyleAlignRight:{name:'imageStyleAlignRight',title:'Right aligned image',icon:h.a,className:'image-style-align-right'}},b.defaultIcons={full:c.a,left:u.a,right:h.a,center:g.a}},function(e,t,a){'use strict';var n=a(12),o=a(34);class i extends n.a{constructor(e,t){super(e),this.style=t}refresh(){const e=this.editor.document.selection.getSelectedElement();this.isEnabled=Object(o.a)(e),this.value=!!e&&(this.style.isDefault?!e.hasAttribute('imageStyle'):e.getAttribute('imageStyle')==this.style.name)}execute(e={}){if(this.value)return;const t=this.editor.document,a=t.selection.getSelectedElement();t.enqueueChanges(()=>{const n=e.batch||t.batch();this.style.isDefault?n.removeAttribute(a,'imageStyle'):n.setAttribute(a,'imageStyle',this.style.name)})}}t.a=i},function(e,t,a){'use strict';function n(e,t,a,n){const o=t.input,i=t.output;if(a.test(o,{class:e.className})&&Object(s.a)(i)){const r=[...i.getAttributeKeys(),'imageStyle'];n.schema.check({name:'image',inside:t.context,attributes:r})&&(a.consume(o,{class:e.className}),i.setAttribute('imageStyle',e.name))}}function o(e,t){for(const a of t)if(a.name===e)return a}function i(e,t,a){return t&&('changeAttribute'==e||'removeAttribute'==e)&&(a.removeClass(t.className),!0)}function r(e,t,a){return t&&('addAttribute'==e||'changeAttribute'==e)&&(a.addClass(t.className),!0)}t.a=function(e){return(t,a,n,s)=>{const d=t.name.split(':')[0],l=d+':imageStyle';if(n.test(a.item,l)){const t=o(a.attributeNewValue,e),c=o(a.attributeOldValue,e),m=s.mapper.toViewElement(a.item),u=i(d,c,m),p=r(d,t,m);(u||p)&&n.consume(a.item,l)}}},t.b=function(e){const t=e.filter((e)=>!e.isDefault);return(e,a,o,i)=>{for(const r of t)n(r,a,o,i)}};var s=a(34)},function(e){e.exports=''},function(e){e.exports=''},function(e){e.exports=''},function(e){e.exports=''},function(e,t,a){'use strict';var n=a(6),o=a(1),i=a(260),r=a(155),s=a(34),d=a(271);class l extends o.a{static get requires(){return[r.a]}static get pluginName(){return'ImageToolbar'}afterInit(){const e=this.editor,t=e.config.get('image.toolbar');t&&t.length&&(this._balloon=this.editor.plugins.get('ContextualBalloon'),this._toolbar=new i.a,n.a.extend(this._toolbar.template,{attributes:{class:'ck-editor-toolbar'}}),this._toolbar.fillFromConfig(t,e.ui.componentFactory),this.listenTo(e.editing.view,'render',()=>{this._checkIsVisible()},{priority:'low'}),this.listenTo(e.ui.focusTracker,'change:isFocused',()=>{this._checkIsVisible()},{priority:'low'}))}_checkIsVisible(){const e=this.editor;e.ui.focusTracker.isFocused?Object(s.b)(e.editing.view.selection)?this._showToolbar():this._hideToolbar():this._hideToolbar()}_showToolbar(){const e=this.editor;this._isVisible?Object(d.b)(e):!this._balloon.hasView(this._toolbar)&&this._balloon.add({view:this._toolbar,position:Object(d.a)(e),balloonClassName:'ck-toolbar-container ck-editor-toolbar-container'})}_hideToolbar(){this._isVisible&&this._balloon.remove(this._toolbar)}get _isVisible(){return this._balloon.visibleView==this._toolbar}}t.a=l},function(e,t,a){'use strict';function n(e){return e.getAncestors().find((e)=>e instanceof d.a)}var o=a(1),i=a(535),r=a(36),s=a(536),d=a(275),l=a(155),c=a(266),m=a(21),u=a(539),p=a(540),g=a.n(p);const f='Ctrl+K';class h extends o.a{static get requires(){return[s.a,l.a]}static get pluginName(){return'Link'}init(){const e=this.editor;e.editing.view.addObserver(i.a),this.formView=this._createForm(),this._balloon=e.plugins.get(l.a),this._createToolbarLinkButton(),this._attachActions()}_createForm(){const e=this.editor,t=new u.a(e.locale),a=e.commands.get('link'),n=e.commands.get('unlink');return t.urlInputView.bind('value').to(a,'value'),t.urlInputView.bind('isReadOnly').to(a,'isEnabled',(e)=>!e),t.saveButtonView.bind('isEnabled').to(a),t.unlinkButtonView.bind('isEnabled').to(n),this.listenTo(t,'submit',()=>{e.execute('link',t.urlInputView.inputView.element.value),this._hidePanel(!0)}),this.listenTo(t,'unlink',()=>{e.execute('unlink'),this._hidePanel(!0)}),this.listenTo(t,'cancel',()=>this._hidePanel(!0)),t.keystrokes.set('Esc',(e,t)=>{this._hidePanel(!0),t()}),t}_createToolbarLinkButton(){const e=this.editor,a=e.commands.get('link'),n=e.t;e.keystrokes.set(f,(e,t)=>{t(),a.isEnabled&&this._showPanel(!0)}),e.ui.componentFactory.add('link',(e)=>{const t=new m.a(e);return t.isEnabled=!0,t.label=n('Link'),t.icon=g.a,t.keystroke=f,t.tooltip=!0,t.bind('isEnabled').to(a,'isEnabled'),this.listenTo(t,'execute',()=>this._showPanel(!0)),t})}_attachActions(){const e=this.editor.editing.view;this.listenTo(e,'click',()=>{const e=this._getSelectedLinkElement();e&&this._showPanel()}),this.editor.keystrokes.set('Tab',(e,t)=>{this._balloon.visibleView!==this.formView||this.formView.focusTracker.isFocused||(this.formView.focus(),t())},{priority:'high'}),this.editor.keystrokes.set('Esc',(e,t)=>{this._balloon.visibleView===this.formView&&(this._hidePanel(),t())}),Object(c.a)({emitter:this.formView,activator:()=>this._balloon.hasView(this.formView),contextElements:[this._balloon.view.element],callback:()=>this._hidePanel()})}_showPanel(e){const t=this.editor,a=t.commands.get('link'),n=t.commands.get('unlink'),o=t.editing,i=o.view,r=i.selection.isCollapsed,s=this._getSelectedLinkElement();this.formView.unlinkButtonView.isVisible=n.isEnabled,this.formView.urlInputView.inputView.element.value=a.value||'',this.listenTo(i,'render',()=>{const e=this._getSelectedLinkElement(),t=i.selection.isCollapsed;r&&!t||s!==e?this._hidePanel(!0):this._balloon.updatePosition(this._getBalloonPositionData())}),this._balloon.hasView(this.formView)?e&&this._balloon.visibleView===this.formView&&this.formView.urlInputView.select():(this._balloon.add({view:this.formView,position:this._getBalloonPositionData()}),e&&this.formView.urlInputView.select())}_hidePanel(e){this.stopListening(this.editor.editing.view,'render');this._balloon.hasView(this.formView)&&(e&&this.editor.editing.view.focus(),this.stopListening(this.editor.editing.view,'render'),this._balloon.remove(this.formView))}_getBalloonPositionData(){const e=this.editor.editing.view,t=this._getSelectedLinkElement(),a=t?e.domConverter.mapViewToDom(t):e.domConverter.viewRangeToDom(e.selection.getFirstRange());return{target:a}}_getSelectedLinkElement(){const e=this.editor.editing.view.selection;if(e.isCollapsed)return n(e.getFirstPosition());else{const t=e.getFirstRange().getTrimmed(),a=n(t.start),o=n(t.end);return a&&a==o?r.a.createIn(a).getTrimmed().isEqual(t)?a:null:null}}}t.a=h},function(e,t,a){'use strict';var n=a(73);class o extends n.a{constructor(e){super(e),this.domEventType='click'}onDomEvent(e){this.fire(e.type,e)}}t.a=o},function(e,t,a){'use strict';var n=a(1),o=a(49),i=a(41),r=a(275),s=a(537),d=a(538);class l extends n.a{init(){const e=this.editor,t=e.data,a=e.editing;e.document.schema.allow({name:'$inline',attributes:'linkHref',inside:'$block'}),e.document.schema.allow({name:'$inline',attributes:'linkHref',inside:'$clipboardHolder'}),Object(o.a)().for(t.modelToView,a.modelToView).fromAttribute('linkHref').toElement((e)=>{const t=new r.a('a',{href:e});return t.priority=5,t}),Object(i.a)().for(t.viewToModel).from({name:'a',attribute:{href:/.?/}}).toAttribute((e)=>({key:'linkHref',value:e.getAttribute('href')})),e.commands.add('link',new s.a(e)),e.commands.add('unlink',new d.a(e))}}t.a=l},function(e,t,a){'use strict';var n=a(12),o=a(26),i=a(3),r=a(276);class s extends n.a{refresh(){const e=this.editor.document;this.value=e.selection.getAttribute('linkHref'),this.isEnabled=e.schema.checkAttributeInSelection(e.selection,'linkHref')}execute(e){const t=this.editor.document,a=t.selection;t.enqueueChanges(()=>{const n=t.batch();if(a.isCollapsed){const t=a.getFirstPosition();if(a.hasAttribute('linkHref')){const t=Object(r.a)(a.getFirstPosition(),a.getAttribute('linkHref'));n.setAttribute(t,'linkHref',e),a.setRanges([t])}else{const r=new o.a(e,{linkHref:e});n.insert(t,r),a.setRanges([i.a.createOn(r)])}}else{const o=t.schema.getValidRanges(a.getRanges(),'linkHref');for(const t of o)n.setAttribute(t,'linkHref',e)}})}}t.a=s},function(e,t,a){'use strict';var n=a(12),o=a(276);class i extends n.a{refresh(){this.isEnabled=this.editor.document.selection.hasAttribute('linkHref')}execute(){const e=this.editor.document,t=e.selection;e.enqueueChanges(()=>{const 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webpackUniversalModuleDefinition(root, factory) {\n\tif(typeof exports === 'object' && typeof module === 'object')\n\t\tmodule.exports = factory();\n\telse if(typeof define === 'function' && define.amd)\n\t\tdefine([], factory);\n\telse if(typeof exports === 'object')\n\t\texports[\"ClassicEditor\"] = factory();\n\telse\n\t\troot[\"ClassicEditor\"] = factory();\n})(this, function() {\nreturn \n\n\n// WEBPACK FOOTER //\n// webpack/universalModuleDefinition","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module module:engine/view/writer\n */\n\nimport Position from './position';\nimport ContainerElement from './containerelement';\nimport AttributeElement from './attributeelement';\nimport EmptyElement from './emptyelement';\nimport UIElement from './uielement';\nimport Text from './text';\nimport Range from './range';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport DocumentFragment from './documentfragment';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n/**\n * Contains functions used for composing view tree.\n *\n * @namespace writer\n */\n\nconst writer = {\n\tbreakAttributes,\n\tbreakContainer,\n\tmergeAttributes,\n\tmergeContainers,\n\tinsert,\n\tremove,\n\tclear,\n\tmove,\n\twrap,\n\twrapPosition,\n\tunwrap,\n\trename\n};\n\nexport default writer;\n\n/**\n * Breaks attribute nodes at provided position or at boundaries of provided range. It breaks attribute elements inside\n * up to a container element.\n *\n * In following examples `

` is a container, `` and `` are attribute nodes:\n *\n *\t\t

foobar{}

->

foobar[]

\n *\t\t

foo{}bar

->

foo{}bar

\n *\t\t

foob{}ar

->

foob[]ar

\n *\t\t

fo{oba}r

->

foobar

\n *\n * **Note:** {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n *\n * **Note:** Difference between {@link module:engine/view/writer~writer.breakAttributes breakAttributes} and\n * {@link module:engine/view/writer~writer.breakContainer breakContainer} is that `breakAttributes` breaks all\n * {@link module:engine/view/attributeelement~AttributeElement attribute elements} that are ancestors of given `position`, up to the first\n * encountered {@link module:engine/view/containerelement~ContainerElement container element}. `breakContainer` assumes that given\n * `position`\n * is directly in container element and breaks that container element.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container`\n * when {@link module:engine/view/range~Range#start start}\n * and {@link module:engine/view/range~Range#end end} positions of a passed range are not placed inside same parent container.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element`\n * when trying to break attributes\n * inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element`\n * when trying to break attributes\n * inside {@link module:engine/view/uielement~UIElement UIElement}.\n *\n * @see module:engine/view/attributeelement~AttributeElement\n * @see module:engine/view/containerelement~ContainerElement\n * @see module:engine/view/writer~writer.breakContainer\n * @function module:engine/view/writer~writer.breakAttributes\n * @param {module:engine/view/position~Position|module:engine/view/range~Range} positionOrRange Position where to break attribute elements.\n * @returns {module:engine/view/position~Position|module:engine/view/range~Range} New position or range, after breaking the attribute\n * elements.\n */\nexport function breakAttributes( positionOrRange ) {\n\tif ( positionOrRange instanceof Position ) {\n\t\treturn _breakAttributes( positionOrRange );\n\t} else {\n\t\treturn _breakAttributesRange( positionOrRange );\n\t}\n}\n\n/**\n * Breaks {@link module:engine/view/containerelement~ContainerElement container view element} into two, at the given position. Position\n * has to be directly inside container element and cannot be in root. Does not break if position is at the beginning\n * or at the end of it's parent element.\n *\n *\t\t

foo^bar

->

foo

bar

\n *\t\t

foo

^

bar

->

foo

bar

\n *\t\t

^foobar

-> ^

foobar

\n *\t\t

foobar^

->

foobar

^\n *\n * **Note:** Difference between {@link module:engine/view/writer~writer.breakAttributes breakAttributes} and\n * {@link module:engine/view/writer~writer.breakContainer breakContainer} is that `breakAttributes` breaks all\n * {@link module:engine/view/attributeelement~AttributeElement attribute elements} that are ancestors of given `position`, up to the first\n * encountered {@link module:engine/view/containerelement~ContainerElement container element}. `breakContainer` assumes that given\n * `position`\n * is directly in container element and breaks that container element.\n *\n * @see module:engine/view/attributeelement~AttributeElement\n * @see module:engine/view/containerelement~ContainerElement\n * @see module:engine/view/writer~writer.breakAttributes\n * @function module:engine/view/writer~writer.breakContainer\n * @param {module:engine/view/position~Position} position Position where to break element.\n * @returns {module:engine/view/position~Position} Position between broken elements. If element has not been broken, the returned position\n * is placed either before it or after it.\n */\nexport function breakContainer( position ) {\n\tconst element = position.parent;\n\n\tif ( !( element.is( 'containerElement' ) ) ) {\n\t\t/**\n\t\t * Trying to break an element which is not a container element.\n\t\t *\n\t\t * @error view-writer-break-non-container-element\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-break-non-container-element: Trying to break an element which is not a container element.' );\n\t}\n\n\tif ( !element.parent ) {\n\t\t/**\n\t\t * Trying to break root element.\n\t\t *\n\t\t * @error view-writer-break-root\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-break-root: Trying to break root element.' );\n\t}\n\n\tif ( position.isAtStart ) {\n\t\treturn Position.createBefore( element );\n\t} else if ( !position.isAtEnd ) {\n\t\tconst newElement = element.clone( false );\n\n\t\tinsert( Position.createAfter( element ), newElement );\n\n\t\tconst sourceRange = new Range( position, Position.createAt( element, 'end' ) );\n\t\tconst targetPosition = new Position( newElement, 0 );\n\n\t\tmove( sourceRange, targetPosition );\n\t}\n\n\treturn Position.createAfter( element );\n}\n\n/**\n * Merges {@link module:engine/view/attributeelement~AttributeElement attribute elements}. It also merges text nodes if needed.\n * Only {@link module:engine/view/attributeelement~AttributeElement#isSimilar similar} attribute elements can be merged.\n *\n * In following examples `

` is a container and `` is an attribute element:\n *\n *\t\t

foo[]bar

->

foo{}bar

\n *\t\t

foo[]bar

->

foo{}bar

\n *\t\t

a[]b

->

a[]b

\n *\n * It will also take care about empty attributes when merging:\n *\n *\t\t

[]

->

[]

\n *\t\t

foo[]bar

->

foo{}bar

\n *\n * **Note:** Difference between {@link module:engine/view/writer~writer.mergeAttributes mergeAttributes} and\n * {@link module:engine/view/writer~writer.mergeContainers mergeContainers} is that `mergeAttributes` merges two\n * {@link module:engine/view/attributeelement~AttributeElement attribute elements} or {@link module:engine/view/text~Text text nodes}\n * while `mergeContainer` merges two {@link module:engine/view/containerelement~ContainerElement container elements}.\n *\n * @see module:engine/view/attributeelement~AttributeElement\n * @see module:engine/view/containerelement~ContainerElement\n * @see module:engine/view/writer~writer.mergeContainers\n * @function module:engine/view/writer~writer.mergeAttributes\n * @param {module:engine/view/position~Position} position Merge position.\n * @returns {module:engine/view/position~Position} Position after merge.\n */\nexport function mergeAttributes( position ) {\n\tconst positionOffset = position.offset;\n\tconst positionParent = position.parent;\n\n\t// When inside text node - nothing to merge.\n\tif ( positionParent.is( 'text' ) ) {\n\t\treturn position;\n\t}\n\n\t// When inside empty attribute - remove it.\n\tif ( positionParent.is( 'attributeElement' ) && positionParent.childCount === 0 ) {\n\t\tconst parent = positionParent.parent;\n\t\tconst offset = positionParent.index;\n\t\tpositionParent.remove();\n\n\t\treturn mergeAttributes( new Position( parent, offset ) );\n\t}\n\n\tconst nodeBefore = positionParent.getChild( positionOffset - 1 );\n\tconst nodeAfter = positionParent.getChild( positionOffset );\n\n\t// Position should be placed between two nodes.\n\tif ( !nodeBefore || !nodeAfter ) {\n\t\treturn position;\n\t}\n\n\t// When position is between two text nodes.\n\tif ( nodeBefore.is( 'text' ) && nodeAfter.is( 'text' ) ) {\n\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t}\n\t// When selection is between two same attribute elements.\n\telse if ( nodeBefore.is( 'attributeElement' ) && nodeAfter.is( 'attributeElement' ) && nodeBefore.isSimilar( nodeAfter ) ) {\n\t\t// Move all children nodes from node placed after selection and remove that node.\n\t\tconst count = nodeBefore.childCount;\n\t\tnodeBefore.appendChildren( nodeAfter.getChildren() );\n\t\tnodeAfter.remove();\n\n\t\t// New position is located inside the first node, before new nodes.\n\t\t// Call this method recursively to merge again if needed.\n\t\treturn mergeAttributes( new Position( nodeBefore, count ) );\n\t}\n\n\treturn position;\n}\n\n/**\n * Merges two {@link module:engine/view/containerelement~ContainerElement container elements} that are before and after given position.\n * Precisely, the element after the position is removed and it's contents are moved to element before the position.\n *\n *\t\t

foo

^

bar

->

foo^bar

\n *\t\t
foo
^

bar

->
foo^bar
\n *\n * **Note:** Difference between {@link module:engine/view/writer~writer.mergeAttributes mergeAttributes} and\n * {@link module:engine/view/writer~writer.mergeContainers mergeContainers} is that `mergeAttributes` merges two\n * {@link module:engine/view/attributeelement~AttributeElement attribute elements} or {@link module:engine/view/text~Text text nodes}\n * while `mergeContainer` merges two {@link module:engine/view/containerelement~ContainerElement container elements}.\n *\n * @see module:engine/view/attributeelement~AttributeElement\n * @see module:engine/view/containerelement~ContainerElement\n * @see module:engine/view/writer~writer.mergeAttributes\n * @function module:engine/view/writer~writer.mergeContainers\n * @param {module:engine/view/position~Position} position Merge position.\n * @returns {module:engine/view/position~Position} Position after merge.\n */\nexport function mergeContainers( position ) {\n\tconst prev = position.nodeBefore;\n\tconst next = position.nodeAfter;\n\n\tif ( !prev || !next || !prev.is( 'containerElement' ) || !next.is( 'containerElement' ) ) {\n\t\t/**\n\t\t * Element before and after given position cannot be merged.\n\t\t *\n\t\t * @error view-writer-merge-containers-invalid-position\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-merge-containers-invalid-position: ' +\n\t\t\t'Element before and after given position cannot be merged.' );\n\t}\n\n\tconst lastChild = prev.getChild( prev.childCount - 1 );\n\tconst newPosition = lastChild instanceof Text ? Position.createAt( lastChild, 'end' ) : Position.createAt( prev, 'end' );\n\n\tmove( Range.createIn( next ), Position.createAt( prev, 'end' ) );\n\tremove( Range.createOn( next ) );\n\n\treturn newPosition;\n}\n\n/**\n * Insert node or nodes at specified position. Takes care about breaking attributes before insertion\n * and merging them afterwards.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n * contains instances that are not {@link module:engine/view/text~Text Texts},\n * {@link module:engine/view/attributeelement~AttributeElement AttributeElements},\n * {@link module:engine/view/containerelement~ContainerElement ContainerElements},\n * {@link module:engine/view/emptyelement~EmptyElement EmptyElements} or\n * {@link module:engine/view/uielement~UIElement UIElements}.\n *\n * @function insert\n * @param {module:engine/view/position~Position} position Insertion position.\n * @param {module:engine/view/text~Text|module:engine/view/attributeelement~AttributeElement|\n * module:engine/view/containerelement~ContainerElement|module:engine/view/emptyelement~EmptyElement|\n * module:engine/view/uielement~UIElement|Iterable.} nodes Node or nodes to insert.\n * @returns {module:engine/view/range~Range} Range around inserted nodes.\n */\nexport function insert( position, nodes ) {\n\tnodes = isIterable( nodes ) ? [ ...nodes ] : [ nodes ];\n\n\t// Check if nodes to insert are instances of AttributeElements, ContainerElements, EmptyElements, UIElements or Text.\n\tvalidateNodesToInsert( nodes );\n\n\tconst container = getParentContainer( position );\n\n\tif ( !container ) {\n\t\t/**\n\t\t * Position's parent container cannot be found.\n\t\t *\n\t\t * @error view-writer-invalid-position-container\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-invalid-position-container' );\n\t}\n\n\tconst insertionPosition = _breakAttributes( position, true );\n\n\tconst length = container.insertChildren( insertionPosition.offset, nodes );\n\tconst endPosition = insertionPosition.getShiftedBy( length );\n\tconst start = mergeAttributes( insertionPosition );\n\n\t// When no nodes were inserted - return collapsed range.\n\tif ( length === 0 ) {\n\t\treturn new Range( start, start );\n\t} else {\n\t\t// If start position was merged - move end position.\n\t\tif ( !start.isEqual( insertionPosition ) ) {\n\t\t\tendPosition.offset--;\n\t\t}\n\n\t\tconst end = mergeAttributes( endPosition );\n\n\t\treturn new Range( start, end );\n\t}\n}\n\n/**\n * Removes provided range from the container.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n * same parent container.\n *\n * @function module:engine/view/writer~writer.remove\n * @param {module:engine/view/range~Range} range Range to remove from container. After removing, it will be updated\n * to a collapsed range showing the new position.\n * @returns {module:engine/view/documentfragment~DocumentFragment} Document fragment containing removed nodes.\n */\nexport function remove( range ) {\n\tvalidateRangeContainer( range );\n\n\t// If range is collapsed - nothing to remove.\n\tif ( range.isCollapsed ) {\n\t\treturn new DocumentFragment();\n\t}\n\n\t// Break attributes at range start and end.\n\tconst { start: breakStart, end: breakEnd } = _breakAttributesRange( range, true );\n\tconst parentContainer = breakStart.parent;\n\n\tconst count = breakEnd.offset - breakStart.offset;\n\n\t// Remove nodes in range.\n\tconst removed = parentContainer.removeChildren( breakStart.offset, count );\n\n\t// Merge after removing.\n\tconst mergePosition = mergeAttributes( breakStart );\n\trange.start = mergePosition;\n\trange.end = Position.createFromPosition( mergePosition );\n\n\t// Return removed nodes.\n\treturn new DocumentFragment( removed );\n}\n\n/**\n * Removes matching elements from given range.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n * same parent container.\n *\n * @function module:engine/view/writer~writer.clear\n * @param {module:engine/view/range~Range} range Range to clear.\n * @param {module:engine/view/element~Element} element Element to remove.\n */\nexport function clear( range, element ) {\n\tvalidateRangeContainer( range );\n\n\t// Create walker on given range.\n\t// We walk backward because when we remove element during walk it modifies range end position.\n\tconst walker = range.getWalker( {\n\t\tdirection: 'backward',\n\t\tignoreElementEnd: true\n\t} );\n\n\t// Let's walk.\n\tfor ( const current of walker ) {\n\t\tconst item = current.item;\n\t\tlet rangeToRemove;\n\n\t\t// When current item matches to the given element.\n\t\tif ( item.is( 'element' ) && element.isSimilar( item ) ) {\n\t\t\t// Create range on this element.\n\t\t\trangeToRemove = Range.createOn( item );\n\t\t// When range starts inside Text or TextProxy element.\n\t\t} else if ( !current.nextPosition.isAfter( range.start ) && ( item.is( 'text' ) || item.is( 'textProxy' ) ) ) {\n\t\t\t// We need to check if parent of this text matches to given element.\n\t\t\tconst parentElement = item.getAncestors().find( ancestor => {\n\t\t\t\treturn ancestor.is( 'element' ) && element.isSimilar( ancestor );\n\t\t\t} );\n\n\t\t\t// If it is then create range inside this element.\n\t\t\tif ( parentElement ) {\n\t\t\t\trangeToRemove = Range.createIn( parentElement );\n\t\t\t}\n\t\t}\n\n\t\t// If we have found element to remove.\n\t\tif ( rangeToRemove ) {\n\t\t\t// We need to check if element range stick out of the given range and truncate if it is.\n\t\t\tif ( rangeToRemove.end.isAfter( range.end ) ) {\n\t\t\t\trangeToRemove.end = range.end;\n\t\t\t}\n\n\t\t\tif ( rangeToRemove.start.isBefore( range.start ) ) {\n\t\t\t\trangeToRemove.start = range.start;\n\t\t\t}\n\n\t\t\t// At the end we remove range with found element.\n\t\t\tremove( rangeToRemove );\n\t\t}\n\t}\n}\n\n/**\n * Moves nodes from provided range to target position.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n * same parent container.\n *\n * @function module:engine/view/writer~writer.move\n * @param {module:engine/view/range~Range} sourceRange Range containing nodes to move.\n * @param {module:engine/view/position~Position} targetPosition Position to insert.\n * @returns {module:engine/view/range~Range} Range in target container. Inserted nodes are placed between\n * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions.\n */\nexport function move( sourceRange, targetPosition ) {\n\tlet nodes;\n\n\tif ( targetPosition.isAfter( sourceRange.end ) ) {\n\t\ttargetPosition = _breakAttributes( targetPosition, true );\n\n\t\tconst parent = targetPosition.parent;\n\t\tconst countBefore = parent.childCount;\n\n\t\tsourceRange = _breakAttributesRange( sourceRange, true );\n\n\t\tnodes = remove( sourceRange );\n\n\t\ttargetPosition.offset += ( parent.childCount - countBefore );\n\t} else {\n\t\tnodes = remove( sourceRange );\n\t}\n\n\treturn insert( targetPosition, nodes );\n}\n\n/**\n * Wraps elements within range with provided {@link module:engine/view/attributeelement~AttributeElement AttributeElement}.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-invalid-range-container`\n * when {@link module:engine/view/range~Range#start}\n * and {@link module:engine/view/range~Range#end} positions are not placed inside same parent container.\n * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n * an instance of {module:engine/view/attributeelement~AttributeElement AttributeElement}.\n *\n * @function module:engine/view/writer~writer.wrap\n * @param {module:engine/view/range~Range} range Range to wrap.\n * @param {module:engine/view/attributeelement~AttributeElement} attribute Attribute element to use as wrapper.\n */\nexport function wrap( range, attribute ) {\n\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\tthrow new CKEditorError( 'view-writer-wrap-invalid-attribute' );\n\t}\n\n\tvalidateRangeContainer( range );\n\n\t// If range is collapsed - nothing to wrap.\n\tif ( range.isCollapsed ) {\n\t\treturn range;\n\t}\n\n\t// Range around one element.\n\tif ( range.end.isEqual( range.start.getShiftedBy( 1 ) ) ) {\n\t\tconst node = range.start.nodeAfter;\n\n\t\tif ( node instanceof AttributeElement && wrapAttributeElement( attribute, node ) ) {\n\t\t\treturn range;\n\t\t}\n\t}\n\n\t// Range is inside single attribute and spans on all children.\n\tif ( rangeSpansOnAllChildren( range ) && wrapAttributeElement( attribute, range.start.parent ) ) {\n\t\tconst parent = range.start.parent.parent;\n\t\tconst index = range.start.parent.index;\n\n\t\treturn Range.createFromParentsAndOffsets( parent, index, parent, index + 1 );\n\t}\n\n\t// Break attributes at range start and end.\n\tconst { start: breakStart, end: breakEnd } = _breakAttributesRange( range, true );\n\tconst parentContainer = breakStart.parent;\n\n\t// Unwrap children located between break points.\n\tconst unwrappedRange = unwrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t// Wrap all children with attribute.\n\tconst newRange = wrapChildren( parentContainer, unwrappedRange.start.offset, unwrappedRange.end.offset, attribute );\n\n\t// Merge attributes at the both ends and return a new range.\n\tconst start = mergeAttributes( newRange.start );\n\n\t// If start position was merged - move end position back.\n\tif ( !start.isEqual( newRange.start ) ) {\n\t\tnewRange.end.offset--;\n\t}\n\tconst end = mergeAttributes( newRange.end );\n\n\treturn new Range( start, end );\n}\n\n/**\n * Wraps position with provided attribute. Returns new position after wrapping. This method will also merge newly\n * added attribute with its siblings whenever possible.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError} `view-writer-wrap-invalid-attribute` when passed attribute element is not\n * an instance of {module:engine/view/attributeelement~AttributeElement AttributeElement}.\n *\n * @param {module:engine/view/position~Position} position\n * @param {module:engine/view/attributeelement~AttributeElement} attribute\n * @returns {module:engine/view/position~Position} New position after wrapping.\n */\nexport function wrapPosition( position, attribute ) {\n\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\tthrow new CKEditorError( 'view-writer-wrap-invalid-attribute' );\n\t}\n\n\t// Return same position when trying to wrap with attribute similar to position parent.\n\tif ( attribute.isSimilar( position.parent ) ) {\n\t\treturn movePositionToTextNode( Position.createFromPosition( position ) );\n\t}\n\n\t// When position is inside text node - break it and place new position between two text nodes.\n\tif ( position.parent.is( 'text' ) ) {\n\t\tposition = breakTextNode( position );\n\t}\n\n\t// Create fake element that will represent position, and will not be merged with other attributes.\n\tconst fakePosition = new AttributeElement();\n\tfakePosition.priority = Number.POSITIVE_INFINITY;\n\tfakePosition.isSimilar = () => false;\n\n\t// Insert fake element in position location.\n\tposition.parent.insertChildren( position.offset, fakePosition );\n\n\t// Range around inserted fake attribute element.\n\tconst wrapRange = new Range( position, position.getShiftedBy( 1 ) );\n\n\t// Wrap fake element with attribute (it will also merge if possible).\n\twrap( wrapRange, attribute );\n\n\t// Remove fake element and place new position there.\n\tconst newPosition = new Position( fakePosition.parent, fakePosition.index );\n\tfakePosition.remove();\n\n\t// If position is placed between text nodes - merge them and return position inside.\n\tconst nodeBefore = newPosition.nodeBefore;\n\tconst nodeAfter = newPosition.nodeAfter;\n\n\tif ( nodeBefore instanceof Text && nodeAfter instanceof Text ) {\n\t\treturn mergeTextNodes( nodeBefore, nodeAfter );\n\t}\n\n\t// If position is next to text node - move position inside.\n\treturn movePositionToTextNode( newPosition );\n}\n\n/**\n * Unwraps nodes within provided range from attribute element.\n *\n * Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when\n * {@link module:engine/view/range~Range#start start} and {@link module:engine/view/range~Range#end end} positions are not placed inside\n * same parent container.\n *\n * @param {module:engine/view/range~Range} range\n * @param {module:engine/view/attributeelement~AttributeElement} element\n */\nexport function unwrap( range, attribute ) {\n\tif ( !( attribute instanceof AttributeElement ) ) {\n\t\t/**\n\t\t * Attribute element need to be instance of attribute element.\n\t\t *\n\t\t * @error view-writer-unwrap-invalid-attribute\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-unwrap-invalid-attribute' );\n\t}\n\n\tvalidateRangeContainer( range );\n\n\t// If range is collapsed - nothing to unwrap.\n\tif ( range.isCollapsed ) {\n\t\treturn range;\n\t}\n\n\t// Range around one element - check if AttributeElement can be unwrapped partially when it's not similar.\n\t// For example:\n\t// unwrap with:\t

result: \n\tif ( range.end.isEqual( range.start.getShiftedBy( 1 ) ) ) {\n\t\tconst node = range.start.nodeAfter;\n\n\t\t// Unwrap single attribute element.\n\t\tif ( !attribute.isSimilar( node ) && node instanceof AttributeElement && unwrapAttributeElement( attribute, node ) ) {\n\t\t\treturn range;\n\t\t}\n\t}\n\n\t// Break attributes at range start and end.\n\tconst { start: breakStart, end: breakEnd } = _breakAttributesRange( range, true );\n\tconst parentContainer = breakStart.parent;\n\n\t// Unwrap children located between break points.\n\tconst newRange = unwrapChildren( parentContainer, breakStart.offset, breakEnd.offset, attribute );\n\n\t// Merge attributes at the both ends and return a new range.\n\tconst start = mergeAttributes( newRange.start );\n\n\t// If start position was merged - move end position back.\n\tif ( !start.isEqual( newRange.start ) ) {\n\t\tnewRange.end.offset--;\n\t}\n\tconst end = mergeAttributes( newRange.end );\n\n\treturn new Range( start, end );\n}\n\n/**\n * Renames element by creating a copy of renamed element but with changed name and then moving contents of the\n * old element to the new one. Keep in mind that this will invalidate all {@link module:engine/view/position~Position positions} which\n * has renamed element as {@link module:engine/view/position~Position#parent a parent}.\n *\n * New element has to be created because `Element#tagName` property in DOM is readonly.\n *\n * Since this function creates a new element and removes the given one, the new element is returned to keep reference.\n *\n * @param {module:engine/view/containerelement~ContainerElement} viewElement Element to be renamed.\n * @param {String} newName New name for element.\n */\nexport function rename( viewElement, newName ) {\n\tconst newElement = new ContainerElement( newName, viewElement.getAttributes() );\n\n\tinsert( Position.createAfter( viewElement ), newElement );\n\tmove( Range.createIn( viewElement ), Position.createAt( newElement ) );\n\tremove( Range.createOn( viewElement ) );\n\n\treturn newElement;\n}\n\n/**\n * Attribute element need to be instance of attribute element.\n *\n * @error view-writer-wrap-invalid-attribute\n */\n\n// Returns first parent container of specified {@link module:engine/view/position~Position Position}.\n// Position's parent node is checked as first, then next parents are checked.\n// Note that {@link module:engine/view/documentfragment~DocumentFragment DocumentFragment} is treated like a container.\n//\n// @param {module:engine/view/position~Position} position Position used as a start point to locate parent container.\n// @returns {module:engine/view/containerelement~ContainerElement|module:engine/view/documentfragment~DocumentFragment|undefined}\n// Parent container element or `undefined` if container is not found.\nfunction getParentContainer( position ) {\n\tlet parent = position.parent;\n\n\twhile ( !isContainerOrFragment( parent ) ) {\n\t\tif ( !parent ) {\n\t\t\treturn undefined;\n\t\t}\n\t\tparent = parent.parent;\n\t}\n\n\treturn parent;\n}\n\n// Function used by both public breakAttributes (without splitting text nodes) and by other methods (with\n// splitting text nodes).\n//\n// @param {module:engine/view/range~Range} range Range which `start` and `end` positions will be used to break attributes.\n// @param {Boolean} [forceSplitText = false] If set to `true`, will break text nodes even if they are directly in\n// container element. This behavior will result in incorrect view state, but is needed by other view writing methods\n// which then fixes view state. Defaults to `false`.\n// @returns {module:engine/view/range~Range} New range with located at break positions.\nfunction _breakAttributesRange( range, forceSplitText = false ) {\n\tconst rangeStart = range.start;\n\tconst rangeEnd = range.end;\n\n\tvalidateRangeContainer( range );\n\n\t// Break at the collapsed position. Return new collapsed range.\n\tif ( range.isCollapsed ) {\n\t\tconst position = _breakAttributes( range.start, forceSplitText );\n\n\t\treturn new Range( position, position );\n\t}\n\n\tconst breakEnd = _breakAttributes( rangeEnd, forceSplitText );\n\tconst count = breakEnd.parent.childCount;\n\tconst breakStart = _breakAttributes( rangeStart, forceSplitText );\n\n\t// Calculate new break end offset.\n\tbreakEnd.offset += breakEnd.parent.childCount - count;\n\n\treturn new Range( breakStart, breakEnd );\n}\n\n// Function used by public breakAttributes (without splitting text nodes) and by other methods (with\n// splitting text nodes).\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-empty-element` when break position\n// is placed inside {@link module:engine/view/emptyelement~EmptyElement EmptyElement}.\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-cannot-break-ui-element` when break position\n// is placed inside {@link module:engine/view/uielement~UIElement UIElement}.\n//\n// @param {module:engine/view/position~Position} position Position where to break attributes.\n// @param {Boolean} [forceSplitText = false] If set to `true`, will break text nodes even if they are directly in\n// container element. This behavior will result in incorrect view state, but is needed by other view writing methods\n// which then fixes view state. Defaults to `false`.\n// @returns {module:engine/view/position~Position} New position after breaking the attributes.\nfunction _breakAttributes( position, forceSplitText = false ) {\n\tconst positionOffset = position.offset;\n\tconst positionParent = position.parent;\n\n\t// If position is placed inside EmptyElement - throw an exception as we cannot break inside.\n\tif ( position.parent.is( 'emptyElement' ) ) {\n\t\t/**\n\t\t * Cannot break inside EmptyElement instance.\n\t\t *\n\t\t * @error view-writer-cannot-break-empty-element\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-cannot-break-empty-element' );\n\t}\n\n\t// If position is placed inside UIElement - throw an exception as we cannot break inside.\n\tif ( position.parent.is( 'uiElement' ) ) {\n\t\t/**\n\t\t * Cannot break inside UIElement instance.\n\t\t *\n\t\t * @error view-writer-cannot-break-ui-element\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-cannot-break-ui-element' );\n\t}\n\n\t// There are no attributes to break and text nodes breaking is not forced.\n\tif ( !forceSplitText && positionParent.is( 'text' ) && isContainerOrFragment( positionParent.parent ) ) {\n\t\treturn Position.createFromPosition( position );\n\t}\n\n\t// Position's parent is container, so no attributes to break.\n\tif ( isContainerOrFragment( positionParent ) ) {\n\t\treturn Position.createFromPosition( position );\n\t}\n\n\t// Break text and start again in new position.\n\tif ( positionParent.is( 'text' ) ) {\n\t\treturn _breakAttributes( breakTextNode( position ), forceSplitText );\n\t}\n\n\tconst length = positionParent.childCount;\n\n\t//

foobar{}

\n\t//

foobar[]

\n\t//

foobar[]

\n\tif ( positionOffset == length ) {\n\t\tconst newPosition = new Position( positionParent.parent, positionParent.index + 1 );\n\n\t\treturn _breakAttributes( newPosition, forceSplitText );\n\t} else\n\t//

foo{}bar

\n\t//

foo[]bar

\n\t//

foo{}bar

\n\tif ( positionOffset === 0 ) {\n\t\tconst newPosition = new Position( positionParent.parent, positionParent.index );\n\n\t\treturn _breakAttributes( newPosition, forceSplitText );\n\t}\n\t//

foob{}ar

\n\t//

foob[]ar

\n\t//

foob[]ar

\n\t//

foob[]ar

\n\telse {\n\t\tconst offsetAfter = positionParent.index + 1;\n\n\t\t// Break element.\n\t\tconst clonedNode = positionParent.clone();\n\n\t\t// Insert cloned node to position's parent node.\n\t\tpositionParent.parent.insertChildren( offsetAfter, clonedNode );\n\n\t\t// Get nodes to move.\n\t\tconst count = positionParent.childCount - positionOffset;\n\t\tconst nodesToMove = positionParent.removeChildren( positionOffset, count );\n\n\t\t// Move nodes to cloned node.\n\t\tclonedNode.appendChildren( nodesToMove );\n\n\t\t// Create new position to work on.\n\t\tconst newPosition = new Position( positionParent.parent, offsetAfter );\n\n\t\treturn _breakAttributes( newPosition, forceSplitText );\n\t}\n}\n\n// Unwraps children from provided `attribute`. Only children contained in `parent` element between\n// `startOffset` and `endOffset` will be unwrapped.\n//\n// @param {module:engine/view/element~Element} parent\n// @param {Number} startOffset\n// @param {Number} endOffset\n// @param {module:engine/view/element~Element} attribute\nfunction unwrapChildren( parent, startOffset, endOffset, attribute ) {\n\tlet i = startOffset;\n\tconst unwrapPositions = [];\n\n\t// Iterate over each element between provided offsets inside parent.\n\twhile ( i < endOffset ) {\n\t\tconst child = parent.getChild( i );\n\n\t\t// If attributes are the similar, then unwrap.\n\t\tif ( child.isSimilar( attribute ) ) {\n\t\t\tconst unwrapped = child.getChildren();\n\t\t\tconst count = child.childCount;\n\n\t\t\t// Replace wrapper element with its children\n\t\t\tchild.remove();\n\t\t\tparent.insertChildren( i, unwrapped );\n\n\t\t\t// Save start and end position of moved items.\n\t\t\tunwrapPositions.push(\n\t\t\t\tnew Position( parent, i ),\n\t\t\t\tnew Position( parent, i + count )\n\t\t\t);\n\n\t\t\t// Skip elements that were unwrapped. Assuming that there won't be another element to unwrap in child\n\t\t\t// elements.\n\t\t\ti += count;\n\t\t\tendOffset += count - 1;\n\t\t} else {\n\t\t\t// If other nested attribute is found start unwrapping there.\n\t\t\tif ( child.is( 'attributeElement' ) ) {\n\t\t\t\tunwrapChildren( child, 0, child.childCount, attribute );\n\t\t\t}\n\n\t\t\ti++;\n\t\t}\n\t}\n\n\t// Merge at each unwrap.\n\tlet offsetChange = 0;\n\n\tfor ( const position of unwrapPositions ) {\n\t\tposition.offset -= offsetChange;\n\n\t\t// Do not merge with elements outside selected children.\n\t\tif ( position.offset == startOffset || position.offset == endOffset ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst newPosition = mergeAttributes( position );\n\n\t\t// If nodes were merged - other merge offsets will change.\n\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\toffsetChange++;\n\t\t\tendOffset--;\n\t\t}\n\t}\n\n\treturn Range.createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n}\n\n// Wraps children with provided `attribute`. Only children contained in `parent` element between\n// `startOffset` and `endOffset` will be wrapped.\n//\n// @param {module:engine/view/element~Element} parent\n// @param {Number} startOffset\n// @param {Number} endOffset\n// @param {module:engine/view/element~Element} attribute\nfunction wrapChildren( parent, startOffset, endOffset, attribute ) {\n\tlet i = startOffset;\n\tconst wrapPositions = [];\n\n\twhile ( i < endOffset ) {\n\t\tconst child = parent.getChild( i );\n\t\tconst isText = child.is( 'text' );\n\t\tconst isAttribute = child.is( 'attributeElement' );\n\t\tconst isEmpty = child.is( 'emptyElement' );\n\t\tconst isUI = child.is( 'uiElement' );\n\n\t\t// Wrap text, empty elements, ui elements or attributes with higher or equal priority.\n\t\tif ( isText || isEmpty || isUI || ( isAttribute && shouldABeOutsideB( attribute, child ) ) ) {\n\t\t\t// Clone attribute.\n\t\t\tconst newAttribute = attribute.clone();\n\n\t\t\t// Wrap current node with new attribute;\n\t\t\tchild.remove();\n\t\t\tnewAttribute.appendChildren( child );\n\t\t\tparent.insertChildren( i, newAttribute );\n\n\t\t\twrapPositions.push(\tnew Position( parent, i ) );\n\t\t}\n\t\t// If other nested attribute is found start wrapping there.\n\t\telse if ( isAttribute ) {\n\t\t\twrapChildren( child, 0, child.childCount, attribute );\n\t\t}\n\n\t\ti++;\n\t}\n\n\t// Merge at each wrap.\n\tlet offsetChange = 0;\n\n\tfor ( const position of wrapPositions ) {\n\t\tposition.offset -= offsetChange;\n\n\t\t// Do not merge with elements outside selected children.\n\t\tif ( position.offset == startOffset ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\tconst newPosition = mergeAttributes( position );\n\n\t\t// If nodes were merged - other merge offsets will change.\n\t\tif ( !newPosition.isEqual( position ) ) {\n\t\t\toffsetChange++;\n\t\t\tendOffset--;\n\t\t}\n\t}\n\n\treturn Range.createFromParentsAndOffsets( parent, startOffset, parent, endOffset );\n}\n\n// Checks if first {@link module:engine/view/attributeelement~AttributeElement AttributeElement} provided to the function\n// can be wrapped otuside second element. It is done by comparing elements'\n// {@link module:engine/view/attributeelement~AttributeElement#priority priorities}, if both have same priority\n// {@link module:engine/view/element~Element#getIdentity identities} are compared.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} a\n// @param {module:engine/view/attributeelement~AttributeElement} b\n// @returns {Boolean}\nfunction shouldABeOutsideB( a, b ) {\n\tif ( a.priority < b.priority ) {\n\t\treturn true;\n\t} else if ( a.priority > b.priority ) {\n\t\treturn false;\n\t}\n\n\t// When priorities are equal and names are different - use identities.\n\treturn a.getIdentity() < b.getIdentity();\n}\n\n// Returns new position that is moved to near text node. Returns same position if there is no text node before of after\n// specified position.\n//\n//\t\t

foo[]

->

foo{}

\n//\t\t

[]foo

->

{}foo

\n//\n// @param {module:engine/view/position~Position} position\n// @returns {module:engine/view/position~Position} Position located inside text node or same position if there is no text nodes\n// before or after position location.\nfunction movePositionToTextNode( position ) {\n\tconst nodeBefore = position.nodeBefore;\n\n\tif ( nodeBefore && nodeBefore.is( 'text' ) ) {\n\t\treturn new Position( nodeBefore, nodeBefore.data.length );\n\t}\n\n\tconst nodeAfter = position.nodeAfter;\n\n\tif ( nodeAfter && nodeAfter.is( 'text' ) ) {\n\t\treturn new Position( nodeAfter, 0 );\n\t}\n\n\treturn position;\n}\n\n// Breaks text node into two text nodes when possible.\n//\n//\t\t

foo{}bar

->

foo[]bar

\n//\t\t

{}foobar

->

[]foobar

\n//\t\t

foobar{}

->

foobar[]

\n//\n// @param {module:engine/view/position~Position} position Position that need to be placed inside text node.\n// @returns {module:engine/view/position~Position} New position after breaking text node.\nfunction breakTextNode( position ) {\n\tif ( position.offset == position.parent.data.length ) {\n\t\treturn new Position( position.parent.parent, position.parent.index + 1 );\n\t}\n\n\tif ( position.offset === 0 ) {\n\t\treturn new Position( position.parent.parent, position.parent.index );\n\t}\n\n\t// Get part of the text that need to be moved.\n\tconst textToMove = position.parent.data.slice( position.offset );\n\n\t// Leave rest of the text in position's parent.\n\tposition.parent.data = position.parent.data.slice( 0, position.offset );\n\n\t// Insert new text node after position's parent text node.\n\tposition.parent.parent.insertChildren( position.parent.index + 1, new Text( textToMove ) );\n\n\t// Return new position between two newly created text nodes.\n\treturn new Position( position.parent.parent, position.parent.index + 1 );\n}\n\n// Merges two text nodes into first node. Removes second node and returns merge position.\n//\n// @param {module:engine/view/text~Text} t1 First text node to merge. Data from second text node will be moved at the end of\n// this text node.\n// @param {module:engine/view/text~Text} t2 Second text node to merge. This node will be removed after merging.\n// @returns {module:engine/view/position~Position} Position after merging text nodes.\nfunction mergeTextNodes( t1, t2 ) {\n\t// Merge text data into first text node and remove second one.\n\tconst nodeBeforeLength = t1.data.length;\n\tt1.data += t2.data;\n\tt2.remove();\n\n\treturn new Position( t1, nodeBeforeLength );\n}\n\n// Wraps one {@link module:engine/view/attributeelement~AttributeElement AttributeElement} into another by merging them if possible.\n// When merging is possible - all attributes, styles and classes are moved from wrapper element to element being\n// wrapped.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n// @param {module:engine/view/attributeelement~AttributeElement} toWrap AttributeElement to wrap using wrapper element.\n// @returns {Boolean} Returns `true` if elements are merged.\nfunction wrapAttributeElement( wrapper, toWrap ) {\n\t// Can't merge if name or priority differs.\n\tif ( wrapper.name !== toWrap.name || wrapper.priority !== toWrap.priority ) {\n\t\treturn false;\n\t}\n\n\t// Check if attributes can be merged.\n\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t// Classes and styles should be checked separately.\n\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\t// If some attributes are different we cannot wrap.\n\t\tif ( toWrap.hasAttribute( key ) && toWrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t// Check if styles can be merged.\n\tfor ( const key of wrapper.getStyleNames() ) {\n\t\tif ( toWrap.hasStyle( key ) && toWrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t// Move all attributes/classes/styles from wrapper to wrapped AttributeElement.\n\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t// Classes and styles should be checked separately.\n\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\t// Move only these attributes that are not present - other are similar.\n\t\tif ( !toWrap.hasAttribute( key ) ) {\n\t\t\ttoWrap.setAttribute( key, wrapper.getAttribute( key ) );\n\t\t}\n\t}\n\n\tfor ( const key of wrapper.getStyleNames() ) {\n\t\tif ( !toWrap.hasStyle( key ) ) {\n\t\t\ttoWrap.setStyle( key, wrapper.getStyle( key ) );\n\t\t}\n\t}\n\n\tfor ( const key of wrapper.getClassNames() ) {\n\t\tif ( !toWrap.hasClass( key ) ) {\n\t\t\ttoWrap.addClass( key );\n\t\t}\n\t}\n\n\treturn true;\n}\n\n// Unwraps {@link module:engine/view/attributeelement~AttributeElement AttributeElement} from another by removing corresponding attributes,\n// classes and styles. All attributes, classes and styles from wrapper should be present inside element being unwrapped.\n//\n// @param {module:engine/view/attributeelement~AttributeElement} wrapper Wrapper AttributeElement.\n// @param {module:engine/view/attributeelement~AttributeElement} toUnwrap AttributeElement to unwrap using wrapper element.\n// @returns {Boolean} Returns `true` if elements are unwrapped.\nfunction unwrapAttributeElement( wrapper, toUnwrap ) {\n\t// Can't unwrap if name or priority differs.\n\tif ( wrapper.name !== toUnwrap.name || wrapper.priority !== toUnwrap.priority ) {\n\t\treturn false;\n\t}\n\n\t// Check if AttributeElement has all wrapper attributes.\n\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t// Classes and styles should be checked separately.\n\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\t// If some attributes are missing or different we cannot unwrap.\n\t\tif ( !toUnwrap.hasAttribute( key ) || toUnwrap.getAttribute( key ) !== wrapper.getAttribute( key ) ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t// Check if AttributeElement has all wrapper classes.\n\tif ( !toUnwrap.hasClass( ...wrapper.getClassNames() ) ) {\n\t\treturn false;\n\t}\n\n\t// Check if AttributeElement has all wrapper styles.\n\tfor ( const key of wrapper.getStyleNames() ) {\n\t\t// If some styles are missing or different we cannot unwrap.\n\t\tif ( !toUnwrap.hasStyle( key ) || toUnwrap.getStyle( key ) !== wrapper.getStyle( key ) ) {\n\t\t\treturn false;\n\t\t}\n\t}\n\n\t// Remove all wrapper's attributes from unwrapped element.\n\tfor ( const key of wrapper.getAttributeKeys() ) {\n\t\t// Classes and styles should be checked separately.\n\t\tif ( key === 'class' || key === 'style' ) {\n\t\t\tcontinue;\n\t\t}\n\n\t\ttoUnwrap.removeAttribute( key );\n\t}\n\n\t// Remove all wrapper's classes from unwrapped element.\n\ttoUnwrap.removeClass( ...wrapper.getClassNames() );\n\n\t// Remove all wrapper's styles from unwrapped element.\n\ttoUnwrap.removeStyle( ...wrapper.getStyleNames() );\n\n\treturn true;\n}\n\n// Returns `true` if range is located in same {@link module:engine/view/attributeelement~AttributeElement AttributeElement}\n// (`start` and `end` positions are located inside same {@link module:engine/view/attributeelement~AttributeElement AttributeElement}),\n// starts on 0 offset and ends after last child node.\n//\n// @param {module:engine/view/range~Range} Range\n// @returns {Boolean}\nfunction rangeSpansOnAllChildren( range ) {\n\treturn range.start.parent == range.end.parent && range.start.parent.is( 'attributeElement' ) &&\n\t\trange.start.offset === 0 && range.end.offset === range.start.parent.childCount;\n}\n\n// Checks if provided nodes are valid to insert. Checks if each node is an instance of\n// {@link module:engine/view/text~Text Text} or {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n// {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElement} or\n// {@link module:engine/view/uielement~UIElement UIElement}.\n//\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-insert-invalid-node` when nodes to insert\n// contains instances that are not {@link module:engine/view/text~Text Texts},\n// {@link module:engine/view/emptyelement~EmptyElement EmptyElements},\n// {@link module:engine/view/uielement~UIElement UIElements},\n// {@link module:engine/view/attributeelement~AttributeElement AttributeElements} or\n// {@link module:engine/view/containerelement~ContainerElement ContainerElements}.\n//\n// @param Iterable. nodes\nfunction validateNodesToInsert( nodes ) {\n\tfor ( const node of nodes ) {\n\t\tif ( !validNodesToInsert.some( ( validNode => node instanceof validNode ) ) ) { // eslint-disable-line no-use-before-define\n\t\t\t/**\n\t\t\t * Inserted nodes should be valid to insert. of {@link module:engine/view/attributeelement~AttributeElement AttributeElement},\n\t\t\t * {@link module:engine/view/containerelement~ContainerElement ContainerElement},\n\t\t\t * {@link module:engine/view/emptyelement~EmptyElement EmptyElement},\n\t\t\t * {@link module:engine/view/uielement~UIElement UIElement}, {@link module:engine/view/text~Text Text}.\n\t\t\t *\n\t\t\t * @error view-writer-insert-invalid-node\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-writer-insert-invalid-node' );\n\t\t}\n\n\t\tif ( !node.is( 'text' ) ) {\n\t\t\tvalidateNodesToInsert( node.getChildren() );\n\t\t}\n\t}\n}\n\nconst validNodesToInsert = [ Text, AttributeElement, ContainerElement, EmptyElement, UIElement ];\n\n// Checks if node is ContainerElement or DocumentFragment, because in most cases they should be treated the same way.\n//\n// @param {module:engine/view/node~Node} node\n// @returns {Boolean} Returns `true` if node is instance of ContainerElement or DocumentFragment.\nfunction isContainerOrFragment( node ) {\n\treturn node && ( node.is( 'containerElement' ) || node.is( 'documentFragment' ) );\n}\n\n// Checks if {@link module:engine/view/range~Range#start range start} and {@link module:engine/view/range~Range#end range end} are placed\n// inside same {@link module:engine/view/containerelement~ContainerElement container element}.\n// Throws {@link module:utils/ckeditorerror~CKEditorError CKEditorError} `view-writer-invalid-range-container` when validation fails.\n//\n// @param {module:engine/view/range~Range} range\nfunction validateRangeContainer( range ) {\n\tconst startContainer = getParentContainer( range.start );\n\tconst endContainer = getParentContainer( range.end );\n\n\tif ( !startContainer || !endContainer || startContainer !== endContainer ) {\n\t\t/**\n\t\t * Range container is invalid. This can happen if {@link module:engine/view/range~Range#start range start} and\n\t\t * {@link module:engine/view/range~Range#end range end} positions are not placed inside same container or\n\t\t * parent container for these positions cannot be found.\n\t\t *\n\t\t * @error view-writer-invalid-range-container\n\t\t */\n\t\tthrow new CKEditorError( 'view-writer-invalid-range-container' );\n\t}\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/view/writer.js\n// module id = 93\n// module chunks = 0","import apply from './_apply';\nimport toInteger from './toInteger';\n\n/** Used as the `TypeError` message for \"Functions\" methods. */\nvar FUNC_ERROR_TEXT = 'Expected a function';\n\n/* Built-in method references for those with the same name as other `lodash` methods. */\nvar nativeMax = Math.max;\n\n/**\n * Creates a function that invokes `func` with the `this` binding of the\n * created function and arguments from `start` and beyond provided as\n * an array.\n *\n * **Note:** This method is based on the\n * [rest parameter](https://mdn.io/rest_parameters).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Function\n * @param {Function} func The function to apply a rest parameter to.\n * @param {number} [start=func.length-1] The start position of the rest parameter.\n * @returns {Function} Returns the new function.\n * @example\n *\n * var say = _.rest(function(what, names) {\n * return what + ' ' + _.initial(names).join(', ') +\n * (_.size(names) > 1 ? ', & ' : '') + _.last(names);\n * });\n *\n * say('hello', 'fred', 'barney', 'pebbles');\n * // => 'hello fred, barney, & pebbles'\n */\nfunction rest(func, start) {\n if (typeof func != 'function') {\n throw new TypeError(FUNC_ERROR_TEXT);\n }\n start = nativeMax(start === undefined ? (func.length - 1) : toInteger(start), 0);\n return function() {\n var args = arguments,\n index = -1,\n length = nativeMax(args.length - start, 0),\n array = Array(length);\n\n while (++index < length) {\n array[index] = args[start + index];\n }\n switch (start) {\n case 0: return func.call(this, array);\n case 1: return func.call(this, args[0], array);\n case 2: return func.call(this, args[0], args[1], array);\n }\n var otherArgs = Array(start + 1);\n index = -1;\n while (++index < start) {\n otherArgs[index] = args[index];\n }\n otherArgs[start] = array;\n return apply(func, this, otherArgs);\n };\n}\n\nexport default rest;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/rest.js\n// module id = 9\n// module chunks = 0"," \t// The module cache\n \tvar installedModules = {};\n\n \t// The require function\n \tfunction __webpack_require__(moduleId) {\n\n \t\t// Check if module is in cache\n \t\tif(installedModules[moduleId]) {\n \t\t\treturn installedModules[moduleId].exports;\n \t\t}\n \t\t// Create a new module (and put it into the cache)\n \t\tvar module = installedModules[moduleId] = {\n \t\t\ti: moduleId,\n \t\t\tl: false,\n \t\t\texports: {}\n \t\t};\n\n \t\t// Execute the module function\n \t\tmodules[moduleId].call(module.exports, module, module.exports, __webpack_require__);\n\n \t\t// Flag the module as loaded\n \t\tmodule.l = true;\n\n \t\t// Return the exports of the module\n \t\treturn module.exports;\n \t}\n\n\n \t// expose the modules object (__webpack_modules__)\n \t__webpack_require__.m = modules;\n\n \t// expose the module cache\n \t__webpack_require__.c = installedModules;\n\n \t// define getter function for harmony exports\n \t__webpack_require__.d = function(exports, name, getter) {\n \t\tif(!__webpack_require__.o(exports, name)) {\n \t\t\tObject.defineProperty(exports, name, {\n \t\t\t\tconfigurable: false,\n \t\t\t\tenumerable: true,\n \t\t\t\tget: getter\n \t\t\t});\n \t\t}\n \t};\n\n \t// getDefaultExport function for compatibility with non-harmony modules\n \t__webpack_require__.n = function(module) {\n \t\tvar getter = module && module.__esModule ?\n \t\t\tfunction getDefault() { return module['default']; } :\n \t\t\tfunction getModuleExports() { return module; };\n \t\t__webpack_require__.d(getter, 'a', getter);\n \t\treturn getter;\n \t};\n\n \t// Object.prototype.hasOwnProperty.call\n \t__webpack_require__.o = function(object, property) { return Object.prototype.hasOwnProperty.call(object, property); };\n\n \t// __webpack_public_path__\n \t__webpack_require__.p = \"\";\n\n \t// Load entry module and return exports\n \treturn __webpack_require__(__webpack_require__.s = 279);\n\n\n\n// WEBPACK FOOTER //\n// webpack/bootstrap 49a568eb53341071c0d6","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module utils/ckeditorerror\n */\n\n/**\n * URL to the documentation with error codes.\n */\nexport const DOCUMENTATION_URL =\n\t'https://ckeditor5.github.io/docs/nightly/ckeditor5/latest/framework/guides/support/error-codes.html';\n\n/**\n * The CKEditor error class.\n *\n * All errors will be shortened during the minification process in order to reduce the code size.\n * Therefore, all error messages should be documented in the same way as those in {@link module:utils/log}.\n *\n * Read more in the {@link module:utils/log} module.\n *\n * @extends Error\n */\nexport default class CKEditorError extends Error {\n\t/**\n\t * Creates an instance of the CKEditorError class.\n\t *\n\t * Read more about error logging in the {@link module:utils/log} module.\n\t *\n\t * @param {String} message The error message in an `error-name: Error message.` format.\n\t * During the minification process the \"Error message\" part will be removed to limit the code size\n\t * and a link to this error documentation will be added to the `message`.\n\t * @param {Object} [data] Additional data describing the error. A stringified version of this object\n\t * will be appended to the error message, so the data are quickly visible in the console. The original\n\t * data object will also be later available under the {@link #data} property.\n\t */\n\tconstructor( message, data ) {\n\t\tmessage = attachLinkToDocumentation( message );\n\n\t\tif ( data ) {\n\t\t\tmessage += ' ' + JSON.stringify( data );\n\t\t}\n\n\t\tsuper( message );\n\n\t\t/**\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = 'CKEditorError';\n\n\t\t/**\n\t\t * The additional error data passed to the constructor.\n\t\t *\n\t\t * @member {Object}\n\t\t */\n\t\tthis.data = data;\n\t}\n\n\t/**\n\t * Checks if error is an instance of CKEditorError class.\n\t *\n\t * @param {Object} error Object to check.\n\t * @returns {Boolean}\n\t */\n\tstatic isCKEditorError( error ) {\n\t\treturn error instanceof CKEditorError;\n\t}\n}\n\n/**\n * Attaches link to the documentation at the end of the error message.\n *\n * @param {String} message Message to be logged.\n * @returns {String}\n */\nexport function attachLinkToDocumentation( message ) {\n\tconst matchedErrorName = message.match( /^([^:]+):/ );\n\n\tif ( !matchedErrorName ) {\n\t\treturn message;\n\t}\n\n\treturn message + ` Read more: ${ DOCUMENTATION_URL }#${ matchedErrorName[ 1 ] }.\\n`;\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/ckeditorerror.js\n// module id = 0\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/position\n */\n\nimport TreeWalker from './treewalker';\nimport last from '@ckeditor/ckeditor5-utils/src/lib/lodash/last';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport Text from './text';\n\n/**\n * Represents a position in the model tree.\n *\n * **Note:** Position is based on offsets, not indexes. This means that position in element containing two text nodes\n * with data `foo` and `bar`, position between them has offset `3`, not `1`.\n * See {@link module:engine/model/position~Position#path} for more.\n *\n * Since position in a model is represented by a {@link module:engine/model/position~Position#root position root} and\n * {@link module:engine/model/position~Position#path position path} it is possible to create positions placed in non-existing elements.\n * This requirement is important for {@link module:engine/model/operation/transform~transform operational transformation}.\n *\n * Also, {@link module:engine/model/operation/operation~Operation operations}\n * kept in {@link module:engine/model/document~Document#history document history}\n * are storing positions (and ranges) which were correct when those operations were applied, but may not be correct\n * after document got changed.\n *\n * When changes are applied to model, it may also happen that {@link module:engine/model/position~Position#parent position parent}\n * will change even if position path has not changed. Keep in mind, that if a position leads to non-existing element,\n * {@link module:engine/model/position~Position#parent} and some other properties and methods will throw errors.\n *\n * In most cases, position with wrong path is caused by an error in code, but it is sometimes needed, as described above.\n */\nexport default class Position {\n\t/**\n\t * Creates a position.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} root Root of the position.\n\t * @param {Array.} path Position path. See {@link module:engine/model/position~Position#path}.\n\t */\n\tconstructor( root, path ) {\n\t\tif ( !root.is( 'element' ) && !root.is( 'documentFragment' ) ) {\n\t\t\t/**\n\t\t\t * Position root is invalid.\n\t\t\t *\n\t\t\t * Positions can only be anchored in elements or document fragments.\n\t\t\t *\n\t\t\t * @error model-position-root-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-root-invalid: Position root invalid.' );\n\t\t}\n\n\t\tif ( !( path instanceof Array ) || path.length === 0 ) {\n\t\t\t/**\n\t\t\t * Position path must be an array with at least one item.\n\t\t\t *\n\t\t\t * @error model-position-path-incorrect\n\t\t\t * @param path\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-path-incorrect: Position path must be an array with at least one item.', { path } );\n\t\t}\n\n\t\t// Normalize the root and path (if element was passed).\n\t\tpath = root.getPath().concat( path );\n\t\troot = root.root;\n\n\t\t/**\n\t\t * Root of the position path.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t\t * module:engine/model/position~Position#root\n\t\t */\n\t\tthis.root = root;\n\n\t\t/**\n\t\t * Position of the node in the tree. **Path contains offsets, not indexes.**\n\t\t *\n\t\t * Position can be placed before, after or in a {@link module:engine/model/node~Node node} if that node has\n\t\t * {@link module:engine/model/node~Node#offsetSize} greater than `1`. Items in position path are\n\t\t * {@link module:engine/model/node~Node#startOffset starting offsets} of position ancestors, starting from direct root children,\n\t\t * down to the position offset in it's parent.\n\t\t *\n\t\t *\t\t ROOT\n\t\t *\t\t |- P before: [ 0 ] after: [ 1 ]\n\t\t *\t\t |- UL before: [ 1 ] after: [ 2 ]\n\t\t *\t\t |- LI before: [ 1, 0 ] after: [ 1, 1 ]\n\t\t *\t\t | |- foo before: [ 1, 0, 0 ] after: [ 1, 0, 3 ]\n\t\t *\t\t |- LI before: [ 1, 1 ] after: [ 1, 2 ]\n\t\t *\t\t |- bar before: [ 1, 1, 0 ] after: [ 1, 1, 3 ]\n\t\t *\n\t\t * `foo` and `bar` are representing {@link module:engine/model/text~Text text nodes}. Since text nodes has offset size\n\t\t * greater than `1` you can place position offset between their start and end:\n\t\t *\n\t\t *\t\t ROOT\n\t\t *\t\t |- P\n\t\t *\t\t |- UL\n\t\t *\t\t |- LI\n\t\t *\t\t | |- f^o|o ^ has path: [ 1, 0, 1 ] | has path: [ 1, 0, 2 ]\n\t\t *\t\t |- LI\n\t\t *\t\t |- b^a|r ^ has path: [ 1, 1, 1 ] | has path: [ 1, 1, 2 ]\n\t\t *\n\t\t * @member {Array.} module:engine/model/position~Position#path\n\t\t */\n\t\tthis.path = path;\n\t}\n\n\t/**\n\t * Offset at which this position is located in its {@link module:engine/model/position~Position#parent parent}. It is equal\n\t * to the last item in position {@link module:engine/model/position~Position#path path}.\n\t *\n\t * @type {Number}\n\t */\n\tget offset() {\n\t\treturn last( this.path );\n\t}\n\n\t/**\n\t * @param {Number} newOffset\n\t */\n\tset offset( newOffset ) {\n\t\tthis.path[ this.path.length - 1 ] = newOffset;\n\t}\n\n\t/**\n\t * Parent element of this position.\n\t *\n\t * Keep in mind that `parent` value is calculated when the property is accessed.\n\t * If {@link module:engine/model/position~Position#path position path}\n\t * leads to a non-existing element, `parent` property will throw error.\n\t *\n\t * Also it is a good idea to cache `parent` property if it is used frequently in an algorithm (i.e. in a long loop).\n\t *\n\t * @readonly\n\t * @type {module:engine/model/element~Element}\n\t */\n\tget parent() {\n\t\tlet parent = this.root;\n\n\t\tfor ( let i = 0; i < this.path.length - 1; i++ ) {\n\t\t\tparent = parent.getChild( parent.offsetToIndex( this.path[ i ] ) );\n\t\t}\n\n\t\treturn parent;\n\t}\n\n\t/**\n\t * Position {@link module:engine/model/position~Position#offset offset} converted to an index in position's parent node. It is\n\t * equal to the {@link module:engine/model/node~Node#index index} of a node after this position. If position is placed\n\t * in text node, position index is equal to the index of that text node.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget index() {\n\t\treturn this.parent.offsetToIndex( this.offset );\n\t}\n\n\t/**\n\t * Returns {@link module:engine/model/text~Text text node} instance in which this position is placed or `null` if this\n\t * position is not in a text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/text~Text|null}\n\t */\n\tget textNode() {\n\t\tconst node = this.parent.getChild( this.index );\n\n\t\treturn ( node instanceof Text && node.startOffset < this.offset ) ? node : null;\n\t}\n\n\t/**\n\t * Node directly after this position or `null` if this position is in text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/model/node~Node|null}\n\t */\n\tget nodeAfter() {\n\t\treturn this.textNode === null ? this.parent.getChild( this.index ) : null;\n\t}\n\n\t/**\n\t * Node directly before this position or `null` if this position is in text node.\n\t *\n\t * @readonly\n\t * @type {Node}\n\t */\n\tget nodeBefore() {\n\t\treturn this.textNode === null ? this.parent.getChild( this.index - 1 ) : null;\n\t}\n\n\t/**\n\t * Is `true` if position is at the beginning of its {@link module:engine/model/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtStart() {\n\t\treturn this.offset === 0;\n\t}\n\n\t/**\n\t * Is `true` if position is at the end of its {@link module:engine/model/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtEnd() {\n\t\treturn this.offset == this.parent.maxOffset;\n\t}\n\n\t/**\n\t * Checks whether this position is before or after given position.\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {module:engine/model/position~PositionRelation}\n\t */\n\tcompareWith( otherPosition ) {\n\t\tif ( this.root != otherPosition.root ) {\n\t\t\treturn 'different';\n\t\t}\n\n\t\tconst result = compareArrays( this.path, otherPosition.path );\n\n\t\tswitch ( result ) {\n\t\t\tcase 'same':\n\t\t\t\treturn 'same';\n\n\t\t\tcase 'prefix':\n\t\t\t\treturn 'before';\n\n\t\t\tcase 'extension':\n\t\t\t\treturn 'after';\n\n\t\t\tdefault:\n\t\t\t\tif ( this.path[ result ] < otherPosition.path[ result ] ) {\n\t\t\t\t\treturn 'before';\n\t\t\t\t} else {\n\t\t\t\t\treturn 'after';\n\t\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Gets the farthest position which matches the callback using\n\t * {@link module:engine/model/treewalker~TreeWalker TreeWalker}.\n\t *\n\t * For example:\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text' );\n\t * \t\t// []foo -> foo[]\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text', { direction: 'backward' } );\n\t * \t\t// foo[] -> []foo\n\t *\n\t * \t\tgetLastMatchingPosition( value => false );\n\t * \t\t// Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/model/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t *\n\t * @returns {module:engine/model/position~Position} The position after the last item which matches the `skip` callback test.\n\t */\n\tgetLastMatchingPosition( skip, options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\t\ttreeWalker.skip( skip );\n\n\t\treturn treeWalker.position;\n\t}\n\n\t/**\n\t * Returns a path to this position's parent. Parent path is equal to position {@link module:engine/model/position~Position#path path}\n\t * but without the last item.\n\t *\n\t * This method returns the parent path even if the parent does not exists.\n\t *\n\t * @returns {Array.} Path to the parent.\n\t */\n\tgetParentPath() {\n\t\treturn this.path.slice( 0, -1 );\n\t}\n\n\t/**\n\t * Returns ancestors array of this position, that is this position's parent and its ancestors.\n\t *\n\t * @returns {Array.} Array with ancestors.\n\t */\n\tgetAncestors() {\n\t\tif ( this.parent.is( 'documentFragment' ) ) {\n\t\t\treturn [ this.parent ];\n\t\t} else {\n\t\t\treturn this.parent.getAncestors( { includeSelf: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns the slice of two position {@link #path paths} which is identical. The {@link #root roots}\n\t * of these two paths must be identical.\n\t *\n\t * @param {module:engine/model/position~Position} position The second position.\n\t * @returns {Array.} The common path.\n\t */\n\tgetCommonPath( position ) {\n\t\tif ( this.root != position.root ) {\n\t\t\treturn [];\n\t\t}\n\n\t\t// We find on which tree-level start and end have the lowest common ancestor\n\t\tconst cmp = compareArrays( this.path, position.path );\n\t\t// If comparison returned string it means that arrays are same.\n\t\tconst diffAt = ( typeof cmp == 'string' ) ? Math.min( this.path.length, position.path.length ) : cmp;\n\n\t\treturn this.path.slice( 0, diffAt );\n\t}\n\n\t/**\n\t * Returns an {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both positions. The {@link #root roots} of these two positions must be identical.\n\t *\n\t * @param {module:engine/model/position~Position} position The second position.\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( position ) {\n\t\tconst ancestorsA = this.getAncestors();\n\t\tconst ancestorsB = position.getAncestors();\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Returns a new instance of `Position`, that has same {@link #parent parent} but it's offset\n\t * is shifted by `shift` value (can be a negative value).\n\t *\n\t * @param {Number} shift Offset shift. Can be a negative value.\n\t * @returns {module:engine/model/position~Position} Shifted position.\n\t */\n\tgetShiftedBy( shift ) {\n\t\tconst shifted = Position.createFromPosition( this );\n\n\t\tconst offset = shifted.offset + shift;\n\t\tshifted.offset = offset < 0 ? 0 : offset;\n\n\t\treturn shifted;\n\t}\n\n\t/**\n\t * Checks whether this position is after given position.\n\t *\n\t * @see module:engine/model/position~Position#isBefore\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if this position is after given position.\n\t */\n\tisAfter( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'after';\n\t}\n\n\t/**\n\t * Checks whether this position is before given position.\n\t *\n\t * **Note:** watch out when using negation of the value returned by this method, because the negation will also\n\t * be `true` if positions are in different roots and you might not expect this. You should probably use\n\t * `a.isAfter( b ) || a.isEqual( b )` or `!a.isBefore( p ) && a.root == b.root` in most scenarios. If your\n\t * condition uses multiple `isAfter` and `isBefore` checks, build them so they do not use negated values, i.e.:\n\t *\n\t *\t\tif ( a.isBefore( b ) && c.isAfter( d ) ) {\n\t *\t\t\t// do A.\n\t *\t\t} else {\n\t *\t\t\t// do B.\n\t *\t\t}\n\t *\n\t * or, if you have only one if-branch:\n\t *\n\t *\t\tif ( !( a.isBefore( b ) && c.isAfter( d ) ) {\n\t *\t\t\t// do B.\n\t *\t\t}\n\t *\n\t * rather than:\n\t *\n\t *\t\tif ( !a.isBefore( b ) || && !c.isAfter( d ) ) {\n\t *\t\t\t// do B.\n\t *\t\t} else {\n\t *\t\t\t// do A.\n\t *\t\t}\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if this position is before given position.\n\t */\n\tisBefore( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'before';\n\t}\n\n\t/**\n\t * Checks whether this position is equal to given position.\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions are same.\n\t */\n\tisEqual( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'same';\n\t}\n\n\t/**\n\t * Checks whether this position is touching given position. Positions touch when there are no text nodes\n\t * or empty nodes in a range between them. Technically, those positions are not equal but in many cases\n\t * they are very similar or even indistinguishable.\n\t *\n\t * **Note:** this method traverses model document so it can be only used when range is up-to-date with model document.\n\t *\n\t * @param {module:engine/model/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions touch.\n\t */\n\tisTouching( otherPosition ) {\n\t\tlet left = null;\n\t\tlet right = null;\n\t\tconst compare = this.compareWith( otherPosition );\n\n\t\tswitch ( compare ) {\n\t\t\tcase 'same':\n\t\t\t\treturn true;\n\n\t\t\tcase 'before':\n\t\t\t\tleft = Position.createFromPosition( this );\n\t\t\t\tright = Position.createFromPosition( otherPosition );\n\t\t\t\tbreak;\n\n\t\t\tcase 'after':\n\t\t\t\tleft = Position.createFromPosition( otherPosition );\n\t\t\t\tright = Position.createFromPosition( this );\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\treturn false;\n\t\t}\n\n\t\t// Cached for optimization purposes.\n\t\tlet leftParent = left.parent;\n\n\t\twhile ( left.path.length + right.path.length ) {\n\t\t\tif ( left.isEqual( right ) ) {\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\tif ( left.path.length > right.path.length ) {\n\t\t\t\tif ( left.offset !== leftParent.maxOffset ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\tleft.path = left.path.slice( 0, -1 );\n\t\t\t\tleftParent = leftParent.parent;\n\t\t\t\tleft.offset++;\n\t\t\t} else {\n\t\t\t\tif ( right.offset !== 0 ) {\n\t\t\t\t\treturn false;\n\t\t\t\t}\n\n\t\t\t\tright.path = right.path.slice( 0, -1 );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by removing `howMany` nodes starting from `deletePosition`.\n\t * It may happen that this position is in a removed node. If that is the case, `null` is returned instead.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} deletePosition Position before the first removed node.\n\t * @param {Number} howMany How many nodes are removed.\n\t * @returns {module:engine/model/position~Position|null} Transformed position or `null`.\n\t */\n\t_getTransformedByDeletion( deletePosition, howMany ) {\n\t\tconst transformed = Position.createFromPosition( this );\n\n\t\t// This position can't be affected if deletion was in a different root.\n\t\tif ( this.root != deletePosition.root ) {\n\t\t\treturn transformed;\n\t\t}\n\n\t\tif ( compareArrays( deletePosition.getParentPath(), this.getParentPath() ) == 'same' ) {\n\t\t\t// If nodes are removed from the node that is pointed by this position...\n\t\t\tif ( deletePosition.offset < this.offset ) {\n\t\t\t\t// And are removed from before an offset of that position...\n\t\t\t\tif ( deletePosition.offset + howMany > this.offset ) {\n\t\t\t\t\t// Position is in removed range, it's no longer in the tree.\n\t\t\t\t\treturn null;\n\t\t\t\t} else {\n\t\t\t\t\t// Decrement the offset accordingly.\n\t\t\t\t\ttransformed.offset -= howMany;\n\t\t\t\t}\n\t\t\t}\n\t\t} else if ( compareArrays( deletePosition.getParentPath(), this.getParentPath() ) == 'prefix' ) {\n\t\t\t// If nodes are removed from a node that is on a path to this position...\n\t\t\tconst i = deletePosition.path.length - 1;\n\n\t\t\tif ( deletePosition.offset <= this.path[ i ] ) {\n\t\t\t\t// And are removed from before next node of that path...\n\t\t\t\tif ( deletePosition.offset + howMany > this.path[ i ] ) {\n\t\t\t\t\t// If the next node of that path is removed return null\n\t\t\t\t\t// because the node containing this position got removed.\n\t\t\t\t\treturn null;\n\t\t\t\t} else {\n\t\t\t\t\t// Otherwise, decrement index on that path.\n\t\t\t\t\ttransformed.path[ i ] -= howMany;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by inserting `howMany` nodes at `insertPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} insertPosition Position where nodes are inserted.\n\t * @param {Number} howMany How many nodes are inserted.\n\t * @param {Boolean} insertBefore Flag indicating whether nodes are inserted before or after `insertPosition`.\n\t * This is important only when `insertPosition` and this position are same. If that is the case and the flag is\n\t * set to `true`, this position will get transformed. If the flag is set to `false`, it won't.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\t_getTransformedByInsertion( insertPosition, howMany, insertBefore ) {\n\t\tconst transformed = Position.createFromPosition( this );\n\n\t\t// This position can't be affected if insertion was in a different root.\n\t\tif ( this.root != insertPosition.root ) {\n\t\t\treturn transformed;\n\t\t}\n\n\t\tif ( compareArrays( insertPosition.getParentPath(), this.getParentPath() ) == 'same' ) {\n\t\t\t// If nodes are inserted in the node that is pointed by this position...\n\t\t\tif ( insertPosition.offset < this.offset || ( insertPosition.offset == this.offset && insertBefore ) ) {\n\t\t\t\t// And are inserted before an offset of that position...\n\t\t\t\t// \"Push\" this positions offset.\n\t\t\t\ttransformed.offset += howMany;\n\t\t\t}\n\t\t} else if ( compareArrays( insertPosition.getParentPath(), this.getParentPath() ) == 'prefix' ) {\n\t\t\t// If nodes are inserted in a node that is on a path to this position...\n\t\t\tconst i = insertPosition.path.length - 1;\n\n\t\t\tif ( insertPosition.offset <= this.path[ i ] ) {\n\t\t\t\t// And are inserted before next node of that path...\n\t\t\t\t// \"Push\" the index on that path.\n\t\t\t\ttransformed.path[ i ] += howMany;\n\t\t\t}\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a copy of this position that is updated by moving `howMany` nodes from `sourcePosition` to `targetPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} sourcePosition Position before the first element to move.\n\t * @param {module:engine/model/position~Position} targetPosition Position where moved elements will be inserted.\n\t * @param {Number} howMany How many consecutive nodes to move, starting from `sourcePosition`.\n\t * @param {Boolean} insertBefore Flag indicating whether moved nodes are pasted before or after `insertPosition`.\n\t * This is important only when `targetPosition` and this position are same. If that is the case and the flag is\n\t * set to `true`, this position will get transformed by range insertion. If the flag is set to `false`, it won't.\n\t * @param {Boolean} [sticky] Flag indicating whether this position \"sticks\" to range, that is if it should be moved\n\t * with the moved range if it is equal to one of range's boundaries.\n\t * @returns {module:engine/model/position~Position} Transformed position.\n\t */\n\t_getTransformedByMove( sourcePosition, targetPosition, howMany, insertBefore, sticky ) {\n\t\t// Moving a range removes nodes from their original position. We acknowledge this by proper transformation.\n\t\tlet transformed = this._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\t// Then we update target position, as it could be affected by nodes removal too.\n\t\ttargetPosition = targetPosition._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tif ( transformed === null || ( sticky && transformed.isEqual( sourcePosition ) ) ) {\n\t\t\t// This position is inside moved range (or sticks to it).\n\t\t\t// In this case, we calculate a combination of this position, move source position and target position.\n\t\t\ttransformed = this._getCombined( sourcePosition, targetPosition );\n\t\t} else {\n\t\t\t// This position is not inside a removed range.\n\t\t\t// In next step, we simply reflect inserting `howMany` nodes, which might further affect the position.\n\t\t\ttransformed = transformed._getTransformedByInsertion( targetPosition, howMany, insertBefore );\n\t\t}\n\n\t\treturn transformed;\n\t}\n\n\t/**\n\t * Returns a new position that is a combination of this position and given positions.\n\t *\n\t * The combined position is a copy of this position transformed by moving a range starting at `source` position\n\t * to the `target` position. It is expected that this position is inside the moved range.\n\t *\n\t * Example:\n\t *\n\t *\t\tlet original = new Position( root, [ 2, 3, 1 ] );\n\t *\t\tlet source = new Position( root, [ 2, 2 ] );\n\t *\t\tlet target = new Position( otherRoot, [ 1, 1, 3 ] );\n\t *\t\toriginal._getCombined( source, target ); // path is [ 1, 1, 4, 1 ], root is `otherRoot`\n\t *\n\t * Explanation:\n\t *\n\t * We have a position `[ 2, 3, 1 ]` and move some nodes from `[ 2, 2 ]` to `[ 1, 1, 3 ]`. The original position\n\t * was inside moved nodes and now should point to the new place. The moved nodes will be after\n\t * positions `[ 1, 1, 3 ]`, `[ 1, 1, 4 ]`, `[ 1, 1, 5 ]`. Since our position was in the second moved node,\n\t * the transformed position will be in a sub-tree of a node at `[ 1, 1, 4 ]`. Looking at original path, we\n\t * took care of `[ 2, 3 ]` part of it. Now we have to add the rest of the original path to the transformed path.\n\t * Finally, the transformed position will point to `[ 1, 1, 4, 1 ]`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} source Beginning of the moved range.\n\t * @param {module:engine/model/position~Position} target Position where the range is moved.\n\t * @returns {module:engine/model/position~Position} Combined position.\n\t */\n\t_getCombined( source, target ) {\n\t\tconst i = source.path.length - 1;\n\n\t\t// The first part of a path to combined position is a path to the place where nodes were moved.\n\t\tconst combined = Position.createFromPosition( target );\n\n\t\t// Then we have to update the rest of the path.\n\n\t\t// Fix the offset because this position might be after `from` position and we have to reflect that.\n\t\tcombined.offset = combined.offset + this.path[ i ] - source.offset;\n\n\t\t// Then, add the rest of the path.\n\t\t// If this position is at the same level as `from` position nothing will get added.\n\t\tcombined.path = combined.path.concat( this.path.slice( i + 1 ) );\n\n\t\treturn combined;\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/model/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/model/item~Item model item} and `'before'` or `'after'` (sets position before or after given model item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link module:engine/model/position~Position.createBefore},\n\t * * {@link module:engine/model/position~Position.createAfter},\n\t * * {@link module:engine/model/position~Position.createFromParentAndOffset},\n\t * * {@link module:engine/model/position~Position.createFromPosition}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset=0] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tstatic createAt( itemOrPosition, offset ) {\n\t\tif ( itemOrPosition instanceof Position ) {\n\t\t\treturn this.createFromPosition( itemOrPosition );\n\t\t} else {\n\t\t\tconst node = itemOrPosition;\n\n\t\t\tif ( offset == 'end' ) {\n\t\t\t\toffset = node.maxOffset;\n\t\t\t} else if ( offset == 'before' ) {\n\t\t\t\treturn this.createBefore( node );\n\t\t\t} else if ( offset == 'after' ) {\n\t\t\t\treturn this.createAfter( node );\n\t\t\t} else if ( !offset ) {\n\t\t\t\toffset = 0;\n\t\t\t}\n\n\t\t\treturn this.createFromParentAndOffset( node, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Creates a new position, after given {@link module:engine/model/item~Item model item}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item after which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic createAfter( item ) {\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position after a root element.\n\t\t\t *\n\t\t\t * @error model-position-after-root\n\t\t\t * @param {module:engine/model/item~Item} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-after-root: You cannot make a position after root.', { root: item } );\n\t\t}\n\n\t\treturn this.createFromParentAndOffset( item.parent, item.endOffset );\n\t}\n\n\t/**\n\t * Creates a new position, before the given {@link module:engine/model/item~Item model item}.\n\t *\n\t * @param {module:engine/model/item~Item} item Item before which the position should be placed.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic createBefore( item ) {\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position before a root element.\n\t\t\t *\n\t\t\t * @error model-position-before-root\n\t\t\t * @param {module:engine/model/item~Item} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-before-root: You cannot make a position before root.', { root: item } );\n\t\t}\n\n\t\treturn this.createFromParentAndOffset( item.parent, item.startOffset );\n\t}\n\n\t/**\n\t * Creates a new position from the parent element and an offset in that element.\n\t *\n\t * @param {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment} parent Position's parent.\n\t * @param {Number} offset Position's offset.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic createFromParentAndOffset( parent, offset ) {\n\t\tif ( !parent.is( 'element' ) && !parent.is( 'documentFragment' ) ) {\n\t\t\t/**\n\t\t\t * Position parent have to be a model element or model document fragment.\n\t\t\t *\n\t\t\t * @error model-position-parent-incorrect\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'model-position-parent-incorrect: Position parent have to be a element or document fragment.' );\n\t\t}\n\n\t\tconst path = parent.getPath();\n\n\t\tpath.push( offset );\n\n\t\treturn new this( parent.root, path );\n\t}\n\n\t/**\n\t * Creates a new position, which is equal to passed position.\n\t *\n\t * @param {module:engine/model/position~Position} position Position to be cloned.\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tstatic createFromPosition( position ) {\n\t\treturn new this( position.root, position.path.slice() );\n\t}\n\n\t/**\n\t * Creates a `Position` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Position`.\n\t * @returns {module:engine/model/position~Position} `Position` instance created using given plain object.\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\tif ( json.root === '$graveyard' ) {\n\t\t\treturn new Position( doc.graveyard, json.path );\n\t\t}\n\n\t\tif ( !doc.hasRoot( json.root ) ) {\n\t\t\t/**\n\t\t\t * Cannot create position for document. Root with specified name does not exist.\n\t\t\t *\n\t\t\t * @error model-position-fromjson-no-root\n\t\t\t * @param {String} rootName\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'model-position-fromjson-no-root: Cannot create position for document. Root with specified name does not exist.',\n\t\t\t\t{ rootName: json.root }\n\t\t\t);\n\t\t}\n\n\t\treturn new Position( doc.getRoot( json.root ), json.path );\n\t}\n}\n\n/**\n * A flag indicating whether this position is `'before'` or `'after'` or `'same'` as given position.\n * If positions are in different roots `'different'` flag is returned.\n *\n * @typedef {String} module:engine/model/position~PositionRelation\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/position.js\n// module id = 1\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module core/plugin\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The base class for CKEditor plugin classes.\n *\n * @implements module:core/plugin~PluginInterface\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Plugin {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor instance.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor} #editor\n\t\t */\n\t\tthis.editor = editor;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n}\n\nmix( Plugin, ObservableMixin );\n\n/**\n * The base interface for CKEditor plugins.\n *\n * In its minimal form it can be a simple function (it will be used as a constructor) which accepts\n * {@link module:core/editor/editor~Editor the editor} as a parm.\n * It can also implement a few methods which, when present, will be used to properly initialize and destroy the plugin.\n *\n *\t\t// A simple plugin which enables a data processor.\n *\t\tfunction MyPlugin( editor ) {\n *\t\t\teditor.data.processor = new MyDataProcessor();\n *\t\t}\n *\n * In most cases, however, you'll want to inherit from the {@link module:core/plugin~Plugin} class which implements the\n * {@link module:utils/observablemixin~ObservableMixin} and is, therefore, more convenient:\n *\n *\t\tclass MyPlugin extends Plugin {\n *\t\t\tinit() {\n *\t\t\t\t// `listenTo()` and `editor` are available thanks to `Plugin`.\n *\t\t\t\t// By using `listenTo()` you'll ensure that the listener will be removed when\n *\t\t\t\t// the plugin is destroyed.\n *\t\t\t\tthis.listenTo( this.editor, 'dataReady', () => {\n *\t\t\t\t\t// Do something when data is ready.\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n * @interface PluginInterface\n */\n\n/**\n * Creates a new plugin instance. This is the first step of a plugin initialization.\n * See also {@link #init} and {@link #afterInit}.\n *\n * A plugin is always instantiated after its {@link module:core/plugin~PluginInterface.requires dependencies} and the\n * {@link #init} and {@link #afterInit} methods are called in the same order.\n *\n * Usually, you'll want to put your plugin's initialization code in the {@link #init} method.\n * The constructor can be understood as \"before init\" and used in special cases, just like\n * {@link #afterInit} servers for the special \"after init\" scenarios (e.g. code which depends on other\n * plugins, but which doesn't {@link module:core/plugin~PluginInterface.requires explicitly require} them).\n *\n * @method #constructor\n * @param {module:core/editor/editor~Editor} editor\n */\n\n/**\n * An array of plugins required by this plugin.\n *\n * To keep a plugin class definition tight it's recommended to define this property as a static getter:\n *\n *\t\timport Image from './image.js';\n *\n *\t\texport default class ImageCaption {\n *\t\t\tstatic get requires() {\n *\t\t\t\treturn [ Image ];\n *\t\t\t}\n *\t\t}\n *\n * @static\n * @readonly\n * @member {Array.|undefined} module:core/plugin~PluginInterface.requires\n */\n\n/**\n * Optional name of the plugin. If set, the plugin will be available in\n * {@link module:core/plugincollection~PluginCollection#get} by its\n * name and its constructor. If not, then only by its constructor.\n *\n * The name should reflect the constructor name.\n *\n * To keep a plugin class definition tight it's recommended to define this property as a static getter:\n *\n *\t\texport default class ImageCaption {\n *\t\t\tstatic get pluginName() {\n *\t\t\t\treturn 'ImageCaption';\n *\t\t\t}\n *\t\t}\n *\n * Note: The native `Function.name` property could not be used to keep the plugin name because\n * it will be mangled during code minification.\n *\n * Naming a plugin is necessary to enable removing it through the\n * {@link module:core/editor/editorconfig~EditorConfig#removePlugins `config.removePlugins`} option.\n *\n * @static\n * @readonly\n * @member {String|undefined} module:core/plugin~PluginInterface.pluginName\n */\n\n/**\n * The second stage (after plugin {@link #constructor}) of plugin initialization.\n * Unlike the plugin constructor this method can be asynchronous.\n *\n * A plugin's `init()` method is called after its {@link module:core/plugin~PluginInterface.requires dependencies} are initialized,\n * so in the same order as constructors of these plugins.\n *\n * **Note:** This method is optional. A plugin instance does not need to have to have it defined.\n *\n * @method #init\n * @returns {null|Promise}\n */\n\n/**\n * The third (and last) stage of plugin initialization. See also {@link #constructor} and {@link #init}.\n *\n * **Note:** This method is optional. A plugin instance does not need to have to have it defined.\n *\n * @method #afterInit\n * @returns {null|Promise}\n */\n\n/**\n * Destroys the plugin.\n *\n * **Note:** This method is optional. A plugin instance does not need to have to have it defined.\n *\n * @method #destroy\n * @returns {null|Promise}\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-core/src/plugin.js\n// module id = 2\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/range\n */\n\nimport Position from './position';\nimport TreeWalker from './treewalker';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Range class. Range is iterable.\n */\nexport default class Range {\n\t/**\n\t * Creates a range spanning from `start` position to `end` position.\n\t *\n\t * **Note:** Constructor creates it's own {@link module:engine/model/position~Position Position} instances basing on passed values.\n\t *\n\t * @param {module:engine/model/position~Position} start Start position.\n\t * @param {module:engine/model/position~Position} [end] End position. If not set, range will be collapsed at `start` position.\n\t */\n\tconstructor( start, end = null ) {\n\t\t/**\n\t\t * Start position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position}\n\t\t */\n\t\tthis.start = Position.createFromPosition( start );\n\n\t\t/**\n\t\t * End position.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/position~Position}\n\t\t */\n\t\tthis.end = end ? Position.createFromPosition( end ) : Position.createFromPosition( start );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/item~Item items} that are in this range and returns\n\t * them together with additional information like length or {@link module:engine/model/position~Position positions},\n\t * grouped as {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t * It iterates over all {@link module:engine/model/textproxy~TextProxy text contents} that are inside the range\n\t * and all the {@link module:engine/model/element~Element}s that are entered into when iterating over this range.\n\t *\n\t * This iterator uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range\n\t * and `ignoreElementEnd` option set to `true`.\n\t *\n\t * @returns {Iterable.}\n\t */\n\t* [ Symbol.iterator ]() {\n\t\tyield* new TreeWalker( { boundaries: this, ignoreElementEnd: true } );\n\t}\n\n\t/**\n\t * Returns whether the range is collapsed, that is if {@link #start} and\n\t * {@link #end} positions are equal.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isCollapsed() {\n\t\treturn this.start.isEqual( this.end );\n\t}\n\n\t/**\n\t * Returns whether this range is flat, that is if {@link #start} position and\n\t * {@link #end} position are in the same {@link module:engine/model/position~Position#parent}.\n\t *\n\t * @type {Boolean}\n\t */\n\tget isFlat() {\n\t\treturn this.start.parent === this.end.parent;\n\t}\n\n\t/**\n\t * Range root element.\n\t *\n\t * @type {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.start.root;\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link module:engine/model/position~Position position}.\n\t *\n\t * @param {module:engine/model/position~Position} position Position to check.\n\t * @returns {Boolean} `true` if given {@link module:engine/model/position~Position position} is contained\n\t * in this range,`false` otherwise.\n\t */\n\tcontainsPosition( position ) {\n\t\treturn position.isAfter( this.start ) && position.isBefore( this.end );\n\t}\n\n\t/**\n\t * Checks whether this range contains given {@link ~Range range}.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to check.\n\t * @param {Boolean} [loose=false] Whether the check is loose or strict. If the check is strict (`false`), compared range cannot\n\t * start or end at the same position as this range boundaries. If the check is loose (`true`), compared range can start, end or\n\t * even be equal to this range. Note that collapsed ranges are always compared in strict mode.\n\t * @returns {Boolean} `true` if given {@link ~Range range} boundaries are contained by this range, `false` otherwise.\n\t */\n\tcontainsRange( otherRange, loose = false ) {\n\t\tif ( otherRange.isCollapsed ) {\n\t\t\tloose = false;\n\t\t}\n\n\t\tconst containsStart = this.containsPosition( otherRange.start ) || ( loose && this.start.isEqual( otherRange.start ) );\n\t\tconst containsEnd = this.containsPosition( otherRange.end ) || ( loose && this.end.isEqual( otherRange.end ) );\n\n\t\treturn containsStart && containsEnd;\n\t}\n\n\t/**\n\t * Checks whether given {@link module:engine/model/item~Item} is inside this range.\n\t *\n\t * @param {module:engine/model/item~Item} item Model item to check.\n\t */\n\tcontainsItem( item ) {\n\t\tconst pos = Position.createBefore( item );\n\n\t\treturn this.containsPosition( pos ) || this.start.isEqual( pos );\n\t}\n\n\t/**\n\t * Two ranges are equal if their {@link #start} and {@link #end} positions are equal.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges are equal, `false` otherwise.\n\t */\n\tisEqual( otherRange ) {\n\t\treturn this.start.isEqual( otherRange.start ) && this.end.isEqual( otherRange.end );\n\t}\n\n\t/**\n\t * Checks and returns whether this range intersects with given range.\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to compare with.\n\t * @returns {Boolean} `true` if ranges intersect, `false` otherwise.\n\t */\n\tisIntersecting( otherRange ) {\n\t\treturn this.start.isBefore( otherRange.end ) && this.end.isAfter( otherRange.start );\n\t}\n\n\t/**\n\t * Computes which part(s) of this {@link ~Range range} is not a part of given {@link ~Range range}.\n\t * Returned array contains zero, one or two {@link ~Range ranges}.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = new Range( new Position( root, [ 2, 7 ] ), new Position( root, [ 4, 0, 1 ] ) );\n\t *\t\tlet otherRange = new Range( new Position( root, [ 1 ] ), new Position( root, [ 5 ] ) );\n\t *\t\tlet transformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has no ranges because `otherRange` contains `range`\n\t *\n\t *\t\totherRange = new Range( new Position( root, [ 1 ] ), new Position( root, [ 3 ] ) );\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has one range: from [ 3 ] to [ 4, 0, 1 ]\n\t *\n\t *\t\totherRange = new Range( new Position( root, [ 3 ] ), new Position( root, [ 4 ] ) );\n\t *\t\ttransformed = range.getDifference( otherRange );\n\t *\t\t// transformed array has two ranges: from [ 2, 7 ] to [ 3 ] and from [ 4 ] to [ 4, 0, 1 ]\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to differentiate against.\n\t * @returns {Array.} The difference between ranges.\n\t */\n\tgetDifference( otherRange ) {\n\t\tconst ranges = [];\n\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect.\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the start to the middle of this range.\n\t\t\t\tranges.push( new Range( this.start, otherRange.start ) );\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// add shrunken range - from the middle of this range to the end.\n\t\t\t\tranges.push( new Range( otherRange.end, this.end ) );\n\t\t\t}\n\t\t} else {\n\t\t\t// Ranges do not intersect, return the original range.\n\t\t\tranges.push( Range.createFromRange( this ) );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an intersection of this {@link ~Range range} and given {@link ~Range range}.\n\t * Intersection is a common part of both of those ranges. If ranges has no common part, returns `null`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = new Range( new Position( root, [ 2, 7 ] ), new Position( root, [ 4, 0, 1 ] ) );\n\t *\t\tlet otherRange = new Range( new Position( root, [ 1 ] ), new Position( root, [ 2 ] ) );\n\t *\t\tlet transformed = range.getIntersection( otherRange ); // null - ranges have no common part\n\t *\n\t *\t\totherRange = new Range( new Position( root, [ 3 ] ), new Position( root, [ 5 ] ) );\n\t *\t\ttransformed = range.getIntersection( otherRange ); // range from [ 3 ] to [ 4, 0, 1 ]\n\t *\n\t * @param {module:engine/model/range~Range} otherRange Range to check for intersection.\n\t * @returns {module:engine/model/range~Range|null} A common part of given ranges or `null` if ranges have no common part.\n\t */\n\tgetIntersection( otherRange ) {\n\t\tif ( this.isIntersecting( otherRange ) ) {\n\t\t\t// Ranges intersect, so a common range will be returned.\n\t\t\t// At most, it will be same as this range.\n\t\t\tlet commonRangeStart = this.start;\n\t\t\tlet commonRangeEnd = this.end;\n\n\t\t\tif ( this.containsPosition( otherRange.start ) ) {\n\t\t\t\t// Given range start is inside this range. This means thaNt we have to\n\t\t\t\t// shrink common range to the given range start.\n\t\t\t\tcommonRangeStart = otherRange.start;\n\t\t\t}\n\n\t\t\tif ( this.containsPosition( otherRange.end ) ) {\n\t\t\t\t// Given range end is inside this range. This means that we have to\n\t\t\t\t// shrink common range to the given range end.\n\t\t\t\tcommonRangeEnd = otherRange.end;\n\t\t\t}\n\n\t\t\treturn new Range( commonRangeStart, commonRangeEnd );\n\t\t}\n\n\t\t// Ranges do not intersect, so they do not have common part.\n\t\treturn null;\n\t}\n\n\t/**\n\t * Computes and returns the smallest set of {@link #isFlat flat} ranges, that covers this range in whole.\n\t *\n\t * See an example of a model structure (`[` and `]` are range boundaries):\n\t *\n\t *\t\troot root\n\t *\t\t |- element DIV DIV P2 P3 DIV\n\t *\t\t | |- element H H P1 f o o b a r H P4\n\t *\t\t | | |- \"fir[st\" fir[st lorem se]cond ipsum\n\t *\t\t | |- element P1\n\t *\t\t | | |- \"lorem\" ||\n\t *\t\t |- element P2 ||\n\t *\t\t | |- \"foo\" VV\n\t *\t\t |- element P3\n\t *\t\t | |- \"bar\" root\n\t *\t\t |- element DIV DIV [P2 P3] DIV\n\t *\t\t | |- element H H [P1] f o o b a r H P4\n\t *\t\t | | |- \"se]cond\" fir[st] lorem [se]cond ipsum\n\t *\t\t | |- element P4\n\t *\t\t | | |- \"ipsum\"\n\t *\n\t * As it can be seen, letters contained in the range are: `stloremfoobarse`, spread across different parents.\n\t * We are looking for minimal set of flat ranges that contains the same nodes.\n\t *\n\t * Minimal flat ranges for above range `( [ 0, 0, 3 ], [ 3, 0, 2 ] )` will be:\n\t *\n\t *\t\t( [ 0, 0, 3 ], [ 0, 0, 5 ] ) = \"st\"\n\t *\t\t( [ 0, 1 ], [ 0, 2 ] ) = element P1 (\"lorem\")\n\t *\t\t( [ 1 ], [ 3 ] ) = element P2, element P3 (\"foobar\")\n\t *\t\t( [ 3, 0, 0 ], [ 3, 0, 2 ] ) = \"se\"\n\t *\n\t * **Note:** if an {@link module:engine/model/element~Element element} is not wholly contained in this range, it won't be returned\n\t * in any of the returned flat ranges. See in the example how `H` elements at the beginning and at the end of the range\n\t * were omitted. Only their parts that were wholly in the range were returned.\n\t *\n\t * **Note:** this method is not returning flat ranges that contain no nodes.\n\t *\n\t * @returns {Array.} Array of flat ranges covering this range.\n\t */\n\tgetMinimalFlatRanges() {\n\t\tconst ranges = [];\n\t\tconst diffAt = this.start.getCommonPath( this.end ).length;\n\n\t\tconst pos = Position.createFromPosition( this.start );\n\t\tlet posParent = pos.parent;\n\n\t\t// Go up.\n\t\twhile ( pos.path.length > diffAt + 1 ) {\n\t\t\tconst howMany = posParent.maxOffset - pos.offset;\n\n\t\t\tif ( howMany !== 0 ) {\n\t\t\t\tranges.push( new Range( pos, pos.getShiftedBy( howMany ) ) );\n\t\t\t}\n\n\t\t\tpos.path = pos.path.slice( 0, -1 );\n\t\t\tpos.offset++;\n\t\t\tposParent = posParent.parent;\n\t\t}\n\n\t\t// Go down.\n\t\twhile ( pos.path.length <= this.end.path.length ) {\n\t\t\tconst offset = this.end.path[ pos.path.length - 1 ];\n\t\t\tconst howMany = offset - pos.offset;\n\n\t\t\tif ( howMany !== 0 ) {\n\t\t\t\tranges.push( new Range( pos, pos.getShiftedBy( howMany ) ) );\n\t\t\t}\n\n\t\t\tpos.offset = offset;\n\t\t\tpos.path.push( 0 );\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Creates a {@link module:engine/model/treewalker~TreeWalker TreeWalker} instance with this range as a boundary.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @param {module:engine/model/position~Position} [options.startPosition]\n\t * @param {Boolean} [options.singleCharacters=false]\n\t * @param {Boolean} [options.shallow=false]\n\t * @param {Boolean} [options.ignoreElementEnd=false]\n\t */\n\tgetWalker( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\treturn new TreeWalker( options );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/item~Item items} that are in this range and returns\n\t * them.\n\t *\n\t * This method uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range and `ignoreElementEnd` option\n\t * set to `true`. However it returns only {@link module:engine/model/item~Item model items},\n\t * not {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/model/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @method getItems\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @returns {Iterable.}\n\t */\n\t* getItems( options = {} ) {\n\t\toptions.boundaries = this;\n\t\toptions.ignoreElementEnd = true;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.item;\n\t\t}\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all {@link module:engine/model/position~Position positions} that are boundaries or\n\t * contained in this range.\n\t *\n\t * This method uses {@link module:engine/model/treewalker~TreeWalker} with `boundaries` set to this range. However it returns only\n\t * {@link module:engine/model/position~Position positions}, not {@link module:engine/model/treewalker~TreeWalkerValue}.\n\t *\n\t * You may specify additional options for the tree walker. See {@link module:engine/model/treewalker~TreeWalker} for\n\t * a full list of available options.\n\t *\n\t * @param {Object} options Object with configuration options. See {@link module:engine/model/treewalker~TreeWalker}.\n\t * @returns {Iterable.}\n\t */\n\t* getPositions( options = {} ) {\n\t\toptions.boundaries = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\n\t\tyield treeWalker.position;\n\n\t\tfor ( const value of treeWalker ) {\n\t\t\tyield value.nextPosition;\n\t\t}\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by given `delta`.\n\t *\n\t * **Note:** transformation may break one range into multiple ranges (e.g. when a part of the range is\n\t * moved to a different part of document tree). For this reason, an array is returned by this method and it\n\t * may contain one or more `Range` instances.\n\t *\n\t * @param {module:engine/model/delta/delta~Delta} delta Delta to transform range by.\n\t * @returns {Array.} Range which is the result of transformation.\n\t */\n\tgetTransformedByDelta( delta ) {\n\t\tconst ranges = [ Range.createFromRange( this ) ];\n\n\t\t// Operation types that a range can be transformed by.\n\t\tconst supportedTypes = new Set( [ 'insert', 'move', 'remove', 'reinsert' ] );\n\n\t\tfor ( const operation of delta.operations ) {\n\t\t\tif ( supportedTypes.has( operation.type ) ) {\n\t\t\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\t\t\tconst result = ranges[ i ]._getTransformedByDocumentChange(\n\t\t\t\t\t\toperation.type,\n\t\t\t\t\t\tdelta.type,\n\t\t\t\t\t\toperation.targetPosition || operation.position,\n\t\t\t\t\t\toperation.howMany || operation.nodes.maxOffset,\n\t\t\t\t\t\toperation.sourcePosition\n\t\t\t\t\t);\n\n\t\t\t\t\tranges.splice( i, 1, ...result );\n\n\t\t\t\t\ti += result.length - 1;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by multiple `deltas`.\n\t *\n\t * **Note:** transformation may break one range into multiple ranges (e.g. when a part of the range is\n\t * moved to a different part of document tree). For this reason, an array is returned by this method and it\n\t * may contain one or more `Range` instances.\n\t *\n\t * @param {Iterable.} deltas Deltas to transform the range by.\n\t * @returns {Array.} Range which is the result of transformation.\n\t */\n\tgetTransformedByDeltas( deltas ) {\n\t\tconst ranges = [ Range.createFromRange( this ) ];\n\n\t\tfor ( const delta of deltas ) {\n\t\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\t\tconst result = ranges[ i ].getTransformedByDelta( delta );\n\n\t\t\t\tranges.splice( i, 1, ...result );\n\t\t\t\ti += result.length - 1;\n\t\t\t}\n\t\t}\n\n\t\t// It may happen that a range is split into two, and then the part of second \"piece\" is moved into first\n\t\t// \"piece\". In this case we will have incorrect third range, which should not be included in the result --\n\t\t// because it is already included in the first \"piece\". In this loop we are looking for all such ranges that\n\t\t// are inside other ranges and we simply remove them.\n\t\tfor ( let i = 0; i < ranges.length; i++ ) {\n\t\t\tconst range = ranges[ i ];\n\n\t\t\tfor ( let j = i + 1; j < ranges.length; j++ ) {\n\t\t\t\tconst next = ranges[ j ];\n\n\t\t\t\tif ( range.containsRange( next ) || next.containsRange( range ) || range.isEqual( next ) ) {\n\t\t\t\t\tranges.splice( j, 1 );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn ranges;\n\t}\n\n\t/**\n\t * Returns an {@link module:engine/model/element~Element} or {@link module:engine/model/documentfragment~DocumentFragment}\n\t * which is a common ancestor of the range's both ends (in which the entire range is contained).\n\t *\n\t * @returns {module:engine/model/element~Element|module:engine/model/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor() {\n\t\treturn this.start.getCommonAncestor( this.end );\n\t}\n\n\t/**\n\t * Returns a range that is a result of transforming this range by a change in the model document.\n\t *\n\t * @protected\n\t * @param {'insert'|'move'|'remove'|'reinsert'} type Change type.\n\t * @param {String} deltaType Type of delta that introduced the change.\n\t * @param {module:engine/model/position~Position} targetPosition Position before the first changed node.\n\t * @param {Number} howMany How many nodes has been changed.\n\t * @param {module:engine/model/position~Position} sourcePosition Source position of changes.\n\t * @returns {Array.}\n\t */\n\t_getTransformedByDocumentChange( type, deltaType, targetPosition, howMany, sourcePosition ) {\n\t\tif ( type == 'insert' ) {\n\t\t\treturn this._getTransformedByInsertion( targetPosition, howMany, false, false );\n\t\t} else {\n\t\t\tconst sourceRange = Range.createFromPositionAndShift( sourcePosition, howMany );\n\n\t\t\t// Edge case for merge delta.\n\t\t\tif (\n\t\t\t\tdeltaType == 'merge' &&\n\t\t\t\tthis.isCollapsed &&\n\t\t\t\t( this.start.isEqual( sourceRange.start ) || this.start.isEqual( sourceRange.end ) )\n\t\t\t) {\n\t\t\t\t// Collapsed range is in merged element, at the beginning or at the end of it.\n\t\t\t\t// Without fix, the range would end up in the graveyard, together with removed element.\n\t\t\t\t//

foo

[]bar

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foobar

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foo[]bar

\n\t\t\t\t//

foo

bar[]

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\n\t\t\t\t//\n\t\t\t\t// In most cases, `sourceRange.start.offset` for merge delta's move operation would be 0,\n\t\t\t\t// so this formula might look overcomplicated.\n\t\t\t\t// However in some scenarios, after operational transformation, move operation might not\n\t\t\t\t// in fact start from 0 and we need to properly count new offset.\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-engine/pull/1133#issuecomment-329080668.\n\t\t\t\tconst offset = this.start.offset - sourceRange.start.offset;\n\n\t\t\t\treturn [ new Range( targetPosition.getShiftedBy( offset ) ) ];\n\t\t\t}\n\t\t\t//\n\t\t\t// Edge case for split delta.\n\t\t\t//\n\t\t\tif ( deltaType == 'split' && this.isCollapsed && this.end.isEqual( sourceRange.end ) ) {\n\t\t\t\t// Collapsed range is at the end of split element.\n\t\t\t\t// Without fix, the range would end up at the end of split (old) element instead of at the end of new element.\n\t\t\t\t// That would happen because this range is not technically inside moved range. Last step below shows the fix.\n\t\t\t\t//

foobar[]

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\n\t\t\t\treturn [ new Range( targetPosition.getShiftedBy( howMany ) ) ];\n\t\t\t}\n\t\t\t//\n\t\t\t// Other edge cases:\n\t\t\t//\n\t\t\t// In all examples `[]` is `this` and `{}` is `sourceRange`, while `^` is move target position.\n\t\t\t//\n\t\t\t// Example:\n\t\t\t//

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\n\t\t\tif (\n\t\t\t\t( sourceRange.containsPosition( this.start ) || sourceRange.start.isEqual( this.start ) ) &&\n\t\t\t\tthis.containsPosition( sourceRange.end ) &&\n\t\t\t\tthis.end.isAfter( targetPosition )\n\t\t\t) {\n\t\t\t\tconst start = this.start._getCombined(\n\t\t\t\t\tsourcePosition,\n\t\t\t\t\ttargetPosition._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t\t);\n\t\t\t\tconst end = this.end._getTransformedByMove( sourcePosition, targetPosition, howMany, false, false );\n\n\t\t\t\treturn [ new Range( start, end ) ];\n\t\t\t}\n\n\t\t\t// Example:\n\t\t\t//

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c[d

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\n\t\t\tif (\n\t\t\t\t( sourceRange.containsPosition( this.end ) || sourceRange.end.isEqual( this.end ) ) &&\n\t\t\t\tthis.containsPosition( sourceRange.start ) &&\n\t\t\t\tthis.start.isBefore( targetPosition )\n\t\t\t) {\n\t\t\t\tconst start = this.start._getTransformedByMove(\n\t\t\t\t\tsourcePosition,\n\t\t\t\t\ttargetPosition,\n\t\t\t\t\thowMany,\n\t\t\t\t\ttrue,\n\t\t\t\t\tfalse\n\t\t\t\t);\n\t\t\t\tconst end = this.end._getCombined(\n\t\t\t\t\tsourcePosition,\n\t\t\t\t\ttargetPosition._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t\t);\n\n\t\t\t\treturn [ new Range( start, end ) ];\n\t\t\t}\n\n\t\t\treturn this._getTransformedByMove( sourcePosition, targetPosition, howMany );\n\t\t}\n\t}\n\n\t/**\n\t * Returns an array containing one or two {@link ~Range ranges} that are a result of transforming this\n\t * {@link ~Range range} by inserting `howMany` nodes at `insertPosition`. Two {@link ~Range ranges} are\n\t * returned if the insertion was inside this {@link ~Range range} and `spread` is set to `true`.\n\t *\n\t * Examples:\n\t *\n\t *\t\tlet range = new Range( new Position( root, [ 2, 7 ] ), new Position( root, [ 4, 0, 1 ] ) );\n\t *\t\tlet transformed = range._getTransformedByInsertion( new Position( root, [ 1 ] ), 2 );\n\t *\t\t// transformed array has one range from [ 4, 7 ] to [ 6, 0, 1 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( new Position( root, [ 4, 0, 0 ] ), 4 );\n\t *\t\t// transformed array has one range from [ 2, 7 ] to [ 4, 0, 5 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( new Position( root, [ 3, 2 ] ), 4 );\n\t *\t\t// transformed array has one range, which is equal to original range\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( new Position( root, [ 3, 2 ] ), 4, true );\n\t *\t\t// transformed array has two ranges: from [ 2, 7 ] to [ 3, 2 ] and from [ 3, 6 ] to [ 4, 0, 1 ]\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( new Position( root, [ 4, 0, 1 ] ), 4, false, false );\n\t *\t\t// transformed array has one range which is equal to original range because insertion is after the range boundary\n\t *\n\t *\t\ttransformed = range._getTransformedByInsertion( new Position( root, [ 4, 0, 1 ] ), 4, false, true );\n\t *\t\t// transformed array has one range: from [ 2, 7 ] to [ 4, 0, 5 ] because range was expanded\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} insertPosition Position where nodes are inserted.\n\t * @param {Number} howMany How many nodes are inserted.\n\t * @param {Boolean} [spread] Flag indicating whether this {~Range range} should be spread if insertion\n\t * was inside the range. Defaults to `false`.\n\t * @param {Boolean} [isSticky] Flag indicating whether insertion should expand a range if it is in a place of\n\t * range boundary. Defaults to `false`.\n\t * @returns {Array.} Result of the transformation.\n\t */\n\t_getTransformedByInsertion( insertPosition, howMany, spread = false, isSticky = false ) {\n\t\tif ( spread && this.containsPosition( insertPosition ) ) {\n\t\t\t// Range has to be spread. The first part is from original start to the spread point.\n\t\t\t// The other part is from spread point to the original end, but transformed by\n\t\t\t// insertion to reflect insertion changes.\n\n\t\t\treturn [\n\t\t\t\tnew Range( this.start, insertPosition ),\n\t\t\t\tnew Range(\n\t\t\t\t\tinsertPosition._getTransformedByInsertion( insertPosition, howMany, true ),\n\t\t\t\t\tthis.end._getTransformedByInsertion( insertPosition, howMany, this.isCollapsed )\n\t\t\t\t)\n\t\t\t];\n\t\t} else {\n\t\t\tconst range = Range.createFromRange( this );\n\n\t\t\tconst insertBeforeStart = range.isCollapsed ? true : !isSticky;\n\t\t\tconst insertBeforeEnd = range.isCollapsed ? true : isSticky;\n\n\t\t\trange.start = range.start._getTransformedByInsertion( insertPosition, howMany, insertBeforeStart );\n\t\t\trange.end = range.end._getTransformedByInsertion( insertPosition, howMany, insertBeforeEnd );\n\n\t\t\treturn [ range ];\n\t\t}\n\t}\n\n\t/**\n\t * Returns an array containing {@link ~Range ranges} that are a result of transforming this\n\t * {@link ~Range range} by moving `howMany` nodes from `sourcePosition` to `targetPosition`.\n\t *\n\t * @protected\n\t * @param {module:engine/model/position~Position} sourcePosition Position from which nodes are moved.\n\t * @param {module:engine/model/position~Position} targetPosition Position to where nodes are moved.\n\t * @param {Number} howMany How many nodes are moved.\n\t * @returns {Array.} Result of the transformation.\n\t */\n\t_getTransformedByMove( sourcePosition, targetPosition, howMany ) {\n\t\tif ( this.isCollapsed ) {\n\t\t\tconst newPos = this.start._getTransformedByMove( sourcePosition, targetPosition, howMany, true, false );\n\n\t\t\treturn [ new Range( newPos ) ];\n\t\t}\n\n\t\tlet result;\n\n\t\tconst moveRange = new Range( sourcePosition, sourcePosition.getShiftedBy( howMany ) );\n\n\t\tconst differenceSet = this.getDifference( moveRange );\n\t\tlet difference = null;\n\n\t\tconst common = this.getIntersection( moveRange );\n\n\t\tif ( differenceSet.length == 1 ) {\n\t\t\t// `moveRange` and this range may intersect.\n\t\t\tdifference = new Range(\n\t\t\t\tdifferenceSet[ 0 ].start._getTransformedByDeletion( sourcePosition, howMany ),\n\t\t\t\tdifferenceSet[ 0 ].end._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t);\n\t\t} else if ( differenceSet.length == 2 ) {\n\t\t\t// `moveRange` is inside this range.\n\t\t\tdifference = new Range(\n\t\t\t\tthis.start,\n\t\t\t\tthis.end._getTransformedByDeletion( sourcePosition, howMany )\n\t\t\t);\n\t\t} // else, `moveRange` contains this range.\n\n\t\tconst insertPosition = targetPosition._getTransformedByDeletion( sourcePosition, howMany );\n\n\t\tif ( difference ) {\n\t\t\tresult = difference._getTransformedByInsertion( insertPosition, howMany, common !== null );\n\t\t} else {\n\t\t\tresult = [];\n\t\t}\n\n\t\tif ( common ) {\n\t\t\tresult.push( new Range(\n\t\t\t\tcommon.start._getCombined( moveRange.start, insertPosition ),\n\t\t\t\tcommon.end._getCombined( moveRange.start, insertPosition )\n\t\t\t) );\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Creates a new range, spreading from specified {@link module:engine/model/position~Position position} to a position moved by\n\t * given `shift`. If `shift` is a negative value, shifted position is treated as the beginning of the range.\n\t *\n\t * @param {module:engine/model/position~Position} position Beginning of the range.\n\t * @param {Number} shift How long the range should be.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic createFromPositionAndShift( position, shift ) {\n\t\tconst start = position;\n\t\tconst end = position.getShiftedBy( shift );\n\n\t\treturn shift > 0 ? new this( start, end ) : new this( end, start );\n\t}\n\n\t/**\n\t * Creates a range from given parents and offsets.\n\t *\n\t * @param {module:engine/model/element~Element} startElement Start position parent element.\n\t * @param {Number} startOffset Start position offset.\n\t * @param {module:engine/model/element~Element} endElement End position parent element.\n\t * @param {Number} endOffset End position offset.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic createFromParentsAndOffsets( startElement, startOffset, endElement, endOffset ) {\n\t\treturn new this(\n\t\t\tPosition.createFromParentAndOffset( startElement, startOffset ),\n\t\t\tPosition.createFromParentAndOffset( endElement, endOffset )\n\t\t);\n\t}\n\n\t/**\n\t * Creates a new instance of `Range` which is equal to passed range.\n\t *\n\t * @param {module:engine/model/range~Range} range Range to clone.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic createFromRange( range ) {\n\t\treturn new this( range.start, range.end );\n\t}\n\n\t/**\n\t * Creates a range inside an {@link module:engine/model/element~Element element} which starts before the first child of\n\t * that element and ends after the last child of that element.\n\t *\n\t * @param {module:engine/model/element~Element} element Element which is a parent for the range.\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic createIn( element ) {\n\t\treturn this.createFromParentsAndOffsets( element, 0, element, element.maxOffset );\n\t}\n\n\t/**\n\t * Creates a range that starts before given {@link module:engine/model/item~Item model item} and ends after it.\n\t *\n\t * @param {module:engine/model/item~Item} item\n\t * @returns {module:engine/model/range~Range}\n\t */\n\tstatic createOn( item ) {\n\t\treturn this.createFromPositionAndShift( Position.createBefore( item ), item.offsetSize );\n\t}\n\n\t/**\n\t * Creates a collapsed range at given {@link module:engine/model/position~Position position}\n\t * or on the given {@link module:engine/model/item~Item item}.\n\t *\n\t * @param {module:engine/model/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset=0] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/model/item~Item model item}.\n\t */\n\tstatic createCollapsedAt( itemOrPosition, offset ) {\n\t\tconst start = Position.createAt( itemOrPosition, offset );\n\t\tconst end = Position.createFromPosition( start );\n\n\t\treturn new Range( start, end );\n\t}\n\n\t/**\n\t * Combines all ranges from the passed array into a one range. At least one range has to be passed.\n\t * Passed ranges must not have common parts.\n\t *\n\t * The first range from the array is a reference range. If other ranges start or end on the exactly same position where\n\t * the reference range, they get combined into one range.\n\t *\n\t *\t\t[ ][] [ ][ ][ ][ ][] [ ] // Passed ranges, shown sorted\n\t *\t\t[ ] // The result of the function if the first range was a reference range.\n\t *\t [ ] // The result of the function if the third-to-seventh range was a reference range.\n\t *\t [ ] // The result of the function if the last range was a reference range.\n\t *\n\t * @param {Array.} ranges Ranges to combine.\n\t * @returns {module:engine/model/range~Range} Combined range.\n\t */\n\tstatic createFromRanges( ranges ) {\n\t\tif ( ranges.length === 0 ) {\n\t\t\t/**\n\t\t\t * At least one range has to be passed to\n\t\t\t * {@link module:engine/model/range~Range.createFromRanges `Range.createFromRanges()`}.\n\t\t\t *\n\t\t\t * @error range-create-from-ranges-empty-array\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'range-create-from-ranges-empty-array: At least one range has to be passed.' );\n\t\t} else if ( ranges.length == 1 ) {\n\t\t\treturn this.createFromRange( ranges[ 0 ] );\n\t\t}\n\n\t\t// 1. Set the first range in `ranges` array as a reference range.\n\t\t// If we are going to return just a one range, one of the ranges need to be the reference one.\n\t\t// Other ranges will be stuck to that range, if possible.\n\t\tconst ref = ranges[ 0 ];\n\n\t\t// 2. Sort all the ranges so it's easier to process them.\n\t\tranges.sort( ( a, b ) => {\n\t\t\treturn a.start.isAfter( b.start ) ? 1 : -1;\n\t\t} );\n\n\t\t// 3. Check at which index the reference range is now.\n\t\tconst refIndex = ranges.indexOf( ref );\n\n\t\t// 4. At this moment we don't need the original range.\n\t\t// We are going to modify the result and we need to return a new instance of Range.\n\t\t// We have to create a copy of the reference range.\n\t\tconst result = new this( ref.start, ref.end );\n\n\t\t// 5. Ranges should be checked and glued starting from the range that is closest to the reference range.\n\t\t// Since ranges are sorted, start with the range with index that is closest to reference range index.\n\t\tfor ( let i = refIndex - 1; i >= 0; i++ ) {\n\t\t\tif ( ranges[ i ].end.isEqual( result.start ) ) {\n\t\t\t\tresult.start = Position.createFromPosition( ranges[ i ].start );\n\t\t\t} else {\n\t\t\t\t// If ranges are not starting/ending at the same position there is no point in looking further.\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\t// 6. Ranges should be checked and glued starting from the range that is closest to the reference range.\n\t\t// Since ranges are sorted, start with the range with index that is closest to reference range index.\n\t\tfor ( let i = refIndex + 1; i < ranges.length; i++ ) {\n\t\t\tif ( ranges[ i ].start.isEqual( result.end ) ) {\n\t\t\t\tresult.end = Position.createFromPosition( ranges[ i ].end );\n\t\t\t} else {\n\t\t\t\t// If ranges are not starting/ending at the same position there is no point in looking further.\n\t\t\t\tbreak;\n\t\t\t}\n\t\t}\n\n\t\treturn result;\n\t}\n\n\t/**\n\t * Creates a `Range` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Range`.\n\t * @param {module:engine/model/document~Document} doc Document object that will be range owner.\n\t * @returns {module:engine/model/element~Element} `Range` instance created using given plain object.\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\treturn new this( Position.fromJSON( json.start, doc ), Position.fromJSON( json.end, doc ) );\n\t}\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/range.js\n// module id = 3\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module utils/mix\n */\n\n/**\n * Copies enumerable properties and symbols from the objects given as 2nd+ parameters to the\n * prototype of first object (a constructor).\n *\n *\t\tclass Editor {\n *\t\t\t...\n *\t\t}\n *\n *\t\tconst SomeMixin = {\n *\t\t\ta() {\n *\t\t\t\treturn 'a';\n *\t\t\t}\n *\t\t};\n *\n *\t\tmix( Editor, SomeMixin, ... );\n *\n *\t\tnew Editor().a(); // -> 'a'\n *\n * Note: Properties which already exist in the base class will not be overriden.\n *\n * @param {Function} [baseClass] Class which prototype will be extended.\n * @param {Object} [...mixins] Objects from which to get properties.\n */\nexport default function mix( baseClass, ...mixins ) {\n\tmixins.forEach( mixin => {\n\t\tObject.getOwnPropertyNames( mixin ).concat( Object.getOwnPropertySymbols( mixin ) )\n\t\t\t.forEach( key => {\n\t\t\t\tif ( key in baseClass.prototype ) {\n\t\t\t\t\treturn;\n\t\t\t\t}\n\n\t\t\t\tconst sourceDescriptor = Object.getOwnPropertyDescriptor( mixin, key );\n\t\t\t\tsourceDescriptor.enumerable = false;\n\n\t\t\t\tObject.defineProperty( baseClass.prototype, key, sourceDescriptor );\n\t\t\t} );\n\t} );\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/mix.js\n// module id = 4\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/element\n */\n\nimport Node from './node';\nimport NodeList from './nodelist';\nimport Text from './text';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n/**\n * Model element. Type of {@link module:engine/model/node~Node node} that has a {@link module:engine/model/element~Element#name name} and\n * {@link module:engine/model/element~Element#getChildren child nodes}.\n *\n * **Important**: see {@link module:engine/model/node~Node} to read about restrictions using `Element` and `Node` API.\n */\nexport default class Element extends Node {\n\t/**\n\t * Creates a model element.\n\t *\n\t * @param {String} name Element's name.\n\t * @param {Object} [attrs] Element's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t * @param {module:engine/model/node~Node|Iterable.} [children]\n\t * One or more nodes to be inserted as children of created element.\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper( attrs );\n\n\t\t/**\n\t\t * Element name.\n\t\t *\n\t\t * @member {String} module:engine/model/element~Element#name\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * List of children nodes.\n\t\t *\n\t\t * @private\n\t\t * @member {module:engine/model/nodelist~NodeList} module:engine/model/element~Element#_children\n\t\t */\n\t\tthis._children = new NodeList();\n\n\t\tif ( children ) {\n\t\t\tthis.insertChildren( 0, children );\n\t\t}\n\t}\n\n\t/**\n\t * Number of this element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Sum of {module:engine/model/node~Node#offsetSize offset sizes} of all of this element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget maxOffset() {\n\t\treturn this._children.maxOffset;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this element, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this.childCount === 0;\n\t}\n\n\t/**\n\t * Checks whether given model tree object is of given type.\n\t *\n\t *\t\tobj.name; // 'listItem'\n\t *\t\tobj instanceof Element; // true\n\t *\n\t *\t\tobj.is( 'element' ); // true\n\t *\t\tobj.is( 'listItem' ); // true\n\t *\t\tobj.is( 'element', 'listItem' ); // true\n\t *\t\tobj.is( 'text' ); // false\n\t *\t\tobj.is( 'element', 'image' ); // false\n\t *\n\t * Read more in {@link module:engine/model/node~Node#is}.\n\t *\n\t * @param {String} type Type to check when `name` parameter is present.\n\t * Otherwise, it acts like the `name` parameter.\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tif ( !name ) {\n\t\t\treturn type == 'element' || type == this.name;\n\t\t} else {\n\t\t\treturn type == 'element' && name == this.name;\n\t\t}\n\t}\n\n\t/**\n\t * Gets the child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/model/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children.getNode( index );\n\t}\n\n\t/**\n\t * Returns an iterator that iterates over all of this element's children.\n\t *\n\t * @returns {Iterable.}\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an index of the given child node. Returns `null` if given node is not a child of this element.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number} Child node's index in this element.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.getNodeIndex( node );\n\t}\n\n\t/**\n\t * Returns the starting offset of given child. Starting offset is equal to the sum of\n\t * {module:engine/model/node~Node#offsetSize offset sizes} of all node's siblings that are before it. Returns `null` if\n\t * given node is not a child of this element.\n\t *\n\t * @param {module:engine/model/node~Node} node Child node to look for.\n\t * @returns {Number} Child node's starting offset.\n\t */\n\tgetChildStartOffset( node ) {\n\t\treturn this._children.getNodeStartOffset( node );\n\t}\n\n\t/**\n\t * Creates a copy of this element and returns it. Created element has the same name and attributes as the original element.\n\t * If clone is deep, the original element's children are also cloned. If not, then empty element is removed.\n\t *\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any child.\n\t */\n\tclone( deep = false ) {\n\t\tconst children = deep ? Array.from( this._children ).map( node => node.clone( true ) ) : null;\n\n\t\treturn new Element( this.name, this.getAttributes(), children );\n\t}\n\n\t/**\n\t * Returns index of a node that occupies given offset. If given offset is too low, returns `0`. If given offset is\n\t * too high, returns {@link module:engine/model/element~Element#getChildIndex index after last child}.\n\t *\n\t *\t\tconst textNode = new Text( 'foo' );\n\t *\t\tconst pElement = new Element( 'p' );\n\t *\t\tconst divElement = new Element( [ textNode, pElement ] );\n\t *\t\tdivElement.offsetToIndex( -1 ); // Returns 0, because offset is too low.\n\t *\t\tdivElement.offsetToIndex( 0 ); // Returns 0, because offset 0 is taken by `textNode` which is at index 0.\n\t *\t\tdivElement.offsetToIndex( 1 ); // Returns 0, because `textNode` has `offsetSize` equal to 3, so it occupies offset 1 too.\n\t *\t\tdivElement.offsetToIndex( 2 ); // Returns 0.\n\t *\t\tdivElement.offsetToIndex( 3 ); // Returns 1.\n\t *\t\tdivElement.offsetToIndex( 4 ); // Returns 2. There are no nodes at offset 4, so last available index is returned.\n\t *\n\t * @param {Number} offset Offset to look for.\n\t * @returns {Number}\n\t */\n\toffsetToIndex( offset ) {\n\t\treturn this._children.offsetToIndex( offset );\n\t}\n\n\t/**\n\t * {@link module:engine/model/element~Element#insertChildren Inserts} one or more nodes at the end of this element.\n\t *\n\t * @param {module:engine/model/node~Node|Iterable.} nodes Nodes to be inserted.\n\t */\n\tappendChildren( nodes ) {\n\t\tthis.insertChildren( this.childCount, nodes );\n\t}\n\n\t/**\n\t * Inserts one or more nodes at the given index and sets {@link module:engine/model/node~Node#parent parent} of these nodes\n\t * to this element.\n\t *\n\t * @param {Number} index Index at which nodes should be inserted.\n\t * @param {module:engine/model/node~Node|Iterable.} nodes Nodes to be inserted.\n\t */\n\tinsertChildren( index, nodes ) {\n\t\tnodes = normalize( nodes );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode.remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\t\t}\n\n\t\tthis._children.insertNodes( index, nodes );\n\t}\n\n\t/**\n\t * Removes one or more nodes starting at the given index and sets\n\t * {@link module:engine/model/node~Node#parent parent} of these nodes to `null`.\n\t *\n\t * @param {Number} index Index of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.} Array containing removed nodes.\n\t */\n\tremoveChildren( index, howMany = 1 ) {\n\t\tconst nodes = this._children.removeNodes( index, howMany );\n\n\t\tfor ( const node of nodes ) {\n\t\t\tnode.parent = null;\n\t\t}\n\n\t\treturn nodes;\n\t}\n\n\t/**\n\t * Returns a descendant node by its path relative to this element.\n\t *\n\t *\t\t// ac\n\t *\t\tthis.getNodeByPath( [ 0 ] ); // -> \"a\"\n\t *\t\tthis.getNodeByPath( [ 1 ] ); // -> \n\t *\t\tthis.getNodeByPath( [ 1, 0 ] ); // -> \"c\"\n\t *\n\t * @param {Array.} relativePath Path of the node to find, relative to this element.\n\t * @returns {module:engine/model/node~Node}\n\t */\n\tgetNodeByPath( relativePath ) {\n\t\tlet node = this; // eslint-disable-line consistent-this\n\n\t\tfor ( const index of relativePath ) {\n\t\t\tnode = node.getChild( node.offsetToIndex( index ) );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Converts `Element` instance to plain object and returns it. Takes care of converting all of this element's children.\n\t *\n\t * @returns {Object} `Element` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.name = this.name;\n\n\t\tif ( this._children.length > 0 ) {\n\t\t\tjson.children = [];\n\n\t\t\tfor ( const node of this._children ) {\n\t\t\t\tjson.children.push( node.toJSON() );\n\t\t\t}\n\t\t}\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates an `Element` instance from given plain object (i.e. parsed JSON string).\n\t * Converts `Element` children to proper nodes.\n\t *\n\t * @param {Object} json Plain object to be converted to `Element`.\n\t * @returns {module:engine/model/element~Element} `Element` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\tlet children = null;\n\n\t\tif ( json.children ) {\n\t\t\tchildren = [];\n\n\t\t\tfor ( const child of json.children ) {\n\t\t\t\tif ( child.name ) {\n\t\t\t\t\t// If child has name property, it is an Element.\n\t\t\t\t\tchildren.push( Element.fromJSON( child ) );\n\t\t\t\t} else {\n\t\t\t\t\t// Otherwise, it is a Text node.\n\t\t\t\t\tchildren.push( Text.fromJSON( child ) );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn new Element( json.name, json.attributes, children );\n\t}\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/model/node~Node|Iterable.}\n// @return {Iterable.}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\treturn typeof node == 'string' ? new Text( node ) : node;\n\t\t} );\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/element.js\n// module id = 5\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module ui/template\n */\n\n/* global document */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport EmitterMixin from '@ckeditor/ckeditor5-utils/src/emittermixin';\nimport View from './view';\nimport ViewCollection from './viewcollection';\nimport cloneDeepWith from '@ckeditor/ckeditor5-utils/src/lib/lodash/cloneDeepWith';\nimport isObject from '@ckeditor/ckeditor5-utils/src/lib/lodash/isObject';\nimport log from '@ckeditor/ckeditor5-utils/src/log';\n\nconst xhtmlNs = 'http://www.w3.org/1999/xhtml';\n\n/**\n * A basic Template class. It renders a DOM HTML element or text from a\n * {@link module:ui/template~TemplateDefinition definition} and supports element attributes, children,\n * bindings to {@link module:utils/observablemixin~Observable observables} and DOM event propagation.\n *\n * A simple template can look like this:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\tclass: 'foo',\n *\t\t\t\tstyle: {\n *\t\t\t\t\tbackgroundColor: 'yellow'\n *\t\t\t\t}\n *\t\t\t},\n *\t\t\ton: {\n *\t\t\t\tclick: bind.to( 'clicked' )\n *\t\t\t}\n *\t\t\tchildren: [\n *\t\t\t\t'A paragraph.'\n *\t\t\t]\n *\t\t} ).render();\n *\n * and it will render the following HTML element:\n *\n *\t\t

A paragraph.

\n *\n * Additionally, the `observable` will always fire `clicked` upon clicking `

` in DOM.\n *\n * See {@link module:ui/template~TemplateDefinition} to know more about templates and complex\n * template definitions.\n *\n* @mixes module:utils/emittermixin~EmitterMixin\n */\nexport default class Template {\n\t/**\n\t * Creates an instance of the {@link ~Template} class.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} def The definition of the template.\n\t */\n\tconstructor( def ) {\n\t\tObject.assign( this, normalize( clone( def ) ) );\n\n\t\t/**\n\t\t * Indicates whether this particular Template instance has been\n\t\t * {@link #render rendered}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {Boolean}\n\t\t */\n\t\tthis._isRendered = false;\n\n\t\t/**\n\t\t * The tag (`tagName`) of this template, e.g. `div`. It also indicates that the template\n\t\t * renders to an HTML element.\n\t\t *\n\t\t * @member {String} #tag\n\t\t */\n\n\t\t/**\n\t\t * Text of the template. It also indicates that the template renders to a DOM text node.\n\t\t *\n\t\t * @member {Array.} #text\n\t\t */\n\n\t\t/**\n\t\t * Attributes of the template, e.g. `{ id: [ 'ck-id' ] }`, corresponding with\n\t\t * attributes of an HTML element.\n\t\t *\n\t\t * **Note**: This property only makes sense when {@link #tag} is defined.\n\t\t *\n\t\t * @member {Object} #attributes\n\t\t */\n\n\t\t/**\n\t\t * Children of the template, sub–templates. Each one is an independent\n\t\t * instance of {@link ~Template}.\n\t\t *\n\t\t * **Note**: This property only makes sense when {@link #tag} is defined.\n\t\t *\n\t\t * @member {module:utils/collection~Collection.} #children\n\t\t */\n\n\t\t/**\n\t\t * DOM event listeners of the template.\n\t\t *\n\t\t * @member {Object} #eventListeners\n\t\t */\n\n\t\t/**\n\t\t * Data used by the {@link #revert} method to restore a node to its original state.\n\t\t *\n\t\t * See: {@link #apply}.\n\t\t *\n\t\t * @readonly\n\t\t * @protected\n\t\t * @member {module:ui/template~RenderData}\n\t\t */\n\t\tthis._revertData = null;\n\t}\n\n\t/**\n\t * Renders a DOM Node (an HTML element or text) out of the template.\n\t *\n\t *\t\tconst domNode = new Template( { ... } ).render();\n\t *\n\t * See: {@link #apply}.\n\t *\n\t * @returns {HTMLElement|Text}\n\t */\n\trender() {\n\t\tconst node = this._renderNode( {\n\t\t\tintoFragment: true\n\t\t} );\n\n\t\tthis._isRendered = true;\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Applies the template to an existing DOM Node, either HTML element or text.\n\t *\n\t * **Note:** No new DOM nodes will be created. Applying extends\n\t * {@link module:ui/template~TemplateDefinition attributes} and\n\t * {@link module:ui/template~TemplateDefinition event listeners} only.\n\t *\n\t * **Note:** Existing `class` and `style` attributes are extended when a template\n\t * is applied to an HTML element, while other attributes and `textContent` are overridden.\n\t *\n\t * **Note:** The process of applying a template can be easily reverted using\n\t * {@link module:ui/template~Template#revert} method.\n\t *\n\t *\t\tconst element = document.createElement( 'div' );\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\tattrs: {\n\t *\t\t\t\tid: 'first-div',\n\t *\t\t\t\tclass: bind.to( 'divClass' )\n\t *\t\t\t},\n\t *\t\t\ton: {\n\t *\t\t\t\tclick: bind( 'elementClicked' ) // Will be fired by the observable.\n\t *\t\t\t}\n\t *\t\t\tchildren: [\n\t *\t\t\t\t'Div text.'\n\t *\t\t\t]\n\t *\t\t} ).apply( element );\n\t *\n\t *\t\telement.outerHTML == \"

Div text.
\"\n\t *\n\t * @see module:ui/template~Template#render\n\t * @see module:ui/template~Template#revert\n\t * @param {Node} node Root node for the template to apply.\n\t */\n\tapply( node ) {\n\t\tthis._revertData = getEmptyRevertData();\n\n\t\tthis._renderNode( {\n\t\t\tnode,\n\t\t\tisApplying: true,\n\t\t\trevertData: this._revertData\n\t\t} );\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Reverts a template {@link module:ui/template~Template#apply applied} to a DOM node.\n\t *\n\t * @param {Node} node Root node for the template to revert. In most of the cases, it is the\n\t * same node used by {@link module:ui/template~Template#apply}.\n\t */\n\trevert( node ) {\n\t\tif ( !this._revertData ) {\n\t\t\t/**\n\t\t\t * Attempting reverting a template which has not been applied yet.\n\t\t\t *\n\t\t\t * @error ui-template-revert-not-applied\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'ui-template-revert-not-applied: Attempting reverting a template which has not been applied yet.' );\n\t\t}\n\n\t\tthis._revertTemplateFromNode( node, this._revertData );\n\t}\n\n\t/**\n\t * An entry point to the interface which binds DOM nodes to\n\t * {@link module:utils/observablemixin~Observable observables}.\n\t * There are two types of bindings:\n\t *\n\t * * HTML element attributes or text `textContent` synchronized with attributes of an\n\t * {@link module:utils/observablemixin~Observable}. Learn more about {@link module:ui/template~BindChain#to}\n\t * and {@link module:ui/template~BindChain#if}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\tattrs: {\n\t *\t\t\t\t// Binds element's \"class\" attribute to observable#classAttribute.\n\t *\t\t\t\tclass: bind.to( 'classAttribute' )\n\t *\t\t\t}\n\t *\t\t} ).render();\n\t *\n\t * * DOM events fired on HTML element propagated through\n\t * {@link module:utils/observablemixin~Observable}. Learn more about {@link module:ui/template~BindChain#to}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tnew Template( {\n\t *\t\t\ton: {\n\t *\t\t\t\t// Will be fired by the observable.\n\t *\t\t\t\tclick: bind( 'elementClicked' )\n\t *\t\t\t}\n\t *\t\t} ).render();\n\t *\n\t * Also see {@link module:ui/view~View#bindTemplate}.\n\t *\n\t * @param {module:utils/observablemixin~Observable} observable An observable which provides boundable attributes.\n\t * @param {module:utils/emittermixin~Emitter} emitter An emitter that listens to observable attribute\n\t * changes or DOM Events (depending on the kind of the binding). Usually, a {@link module:ui/view~View} instance.\n\t * @returns {module:ui/template~BindChain}\n\t */\n\tstatic bind( observable, emitter ) {\n\t\treturn {\n\t\t\tto( eventNameOrFunctionOrAttribute, callback ) {\n\t\t\t\treturn new TemplateToBinding( {\n\t\t\t\t\teventNameOrFunction: eventNameOrFunctionOrAttribute,\n\t\t\t\t\tattribute: eventNameOrFunctionOrAttribute,\n\t\t\t\t\tobservable, emitter, callback\n\t\t\t\t} );\n\t\t\t},\n\n\t\t\tif( attribute, valueIfTrue, callback ) {\n\t\t\t\treturn new TemplateIfBinding( {\n\t\t\t\t\tobservable, emitter, attribute, valueIfTrue, callback\n\t\t\t\t} );\n\t\t\t}\n\t\t};\n\t}\n\n\t/**\n\t * Extends an existing {@link module:ui/template~Template} instance with some additional content\n\t * from another {@link module:ui/template~TemplateDefinition}.\n\t *\n\t *\t\tconst bind = Template.bind( observable, emitter );\n\t *\n\t *\t\tconst template = new Template( {\n\t *\t\t\ttag: 'p',\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'a',\n\t *\t\t\t\tdata-x: bind.to( 'foo' )\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t{\n\t *\t\t\t\t\ttag: 'span',\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\tclass: 'b'\n\t *\t\t\t\t\t},\n\t *\t\t\t\t\tchildren: [\n\t *\t\t\t\t\t\t'Span'\n\t *\t\t\t\t\t]\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t } );\n\t *\n\t *\t\t// Instance-level extension.\n\t *\t\tTemplate.extend( template, {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'b',\n\t *\t\t\t\tdata-x: bind.to( 'bar' )\n\t *\t\t\t},\n\t *\t\t\tchildren: [\n\t *\t\t\t\t{\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\tclass: 'c'\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\t\t\t]\n\t *\t\t} );\n\t *\n\t *\t\t// Child extension.\n\t *\t\tTemplate.extend( template.children.get( 0 ), {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: 'd'\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t * the `outerHTML` of `template.render()` is:\n\t *\n\t *\t\t

\n\t *\t\t\tSpan\n\t *\t\t

\n\t *\n\t * @param {module:ui/template~Template} template An existing template instance to be extended.\n\t * @param {module:ui/template~TemplateDefinition} def Additional definition to be applied to a template.\n\t */\n\tstatic extend( template, def ) {\n\t\tif ( template._isRendered ) {\n\t\t\t/**\n\t\t\t * Extending a template after rendering may not work as expected. To make sure\n\t\t\t * the {@link module:ui/template~Template.extend extending} works for an element,\n\t\t\t * make sure it happens before {@link #render} is called.\n\t\t\t *\n\t\t\t * @error template-extend-render\n\t\t\t */\n\t\t\tlog.warn( 'template-extend-render: Attempting to extend a template which has already been rendered.' );\n\t\t}\n\n\t\textendTemplate( template, normalize( clone( def ) ) );\n\t}\n\n\t/**\n\t * Renders a DOM Node (either an HTML element or text) out of the template.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderNode( data ) {\n\t\tlet isInvalid;\n\n\t\tif ( data.node ) {\n\t\t\t// When applying, a definition cannot have \"tag\" and \"text\" at the same time.\n\t\t\tisInvalid = this.tag && this.text;\n\t\t} else {\n\t\t\t// When rendering, a definition must have either \"tag\" or \"text\": XOR( this.tag, this.text ).\n\t\t\tisInvalid = this.tag ? this.text : !this.text;\n\t\t}\n\n\t\tif ( isInvalid ) {\n\t\t\t/**\n\t\t\t * Node definition cannot have \"tag\" and \"text\" properties at the same time.\n\t\t\t * Node definition must have either \"tag\" or \"text\" when rendering new Node.\n\t\t\t *\n\t\t\t * @error ui-template-wrong-syntax\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-wrong-syntax: Node definition must have either \"tag\" or \"text\" when rendering new Node.'\n\t\t\t);\n\t\t}\n\n\t\tif ( this.text ) {\n\t\t\treturn this._renderText( data );\n\t\t} else {\n\t\t\treturn this._renderElement( data );\n\t\t}\n\t}\n\n\t/**\n\t * Renders an HTML element out of the template.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderElement( data ) {\n\t\tlet node = data.node;\n\n\t\tif ( !node ) {\n\t\t\tnode = data.node = document.createElementNS( this.ns || xhtmlNs, this.tag );\n\t\t}\n\n\t\tthis._renderAttributes( data );\n\t\tthis._renderElementChildren( data );\n\t\tthis._setUpListeners( data );\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Renders a text node out of {@link module:ui/template~Template#text}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderText( data ) {\n\t\tlet node = data.node;\n\n\t\t// Save the original textContent to revert it in #revert().\n\t\tif ( node ) {\n\t\t\tdata.revertData.text = node.textContent;\n\t\t} else {\n\t\t\tnode = data.node = document.createTextNode( '' );\n\t\t}\n\n\t\t// Check if this Text Node is bound to Observable. Cases:\n\t\t//\n\t\t//\t\ttext: [ Template.bind( ... ).to( ... ) ]\n\t\t//\n\t\t//\t\ttext: [\n\t\t//\t\t\t'foo',\n\t\t//\t\t\tTemplate.bind( ... ).to( ... ),\n\t\t//\t\t\t...\n\t\t//\t\t]\n\t\t//\n\t\tif ( hasTemplateBinding( this.text ) ) {\n\t\t\tthis._bindToObservable( {\n\t\t\t\tschema: this.text,\n\t\t\t\tupdater: getTextUpdater( node ),\n\t\t\t\tdata\n\t\t\t} );\n\t\t}\n\t\t// Simply set text. Cases:\n\t\t//\n\t\t//\t\ttext: [ 'all', 'are', 'static' ]\n\t\t//\n\t\t//\t\ttext: [ 'foo' ]\n\t\t//\n\t\telse {\n\t\t\tnode.textContent = this.text.join( '' );\n\t\t}\n\n\t\treturn node;\n\t}\n\n\t/**\n\t * Renders an HTML element attributes out of {@link module:ui/template~Template#attributes}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderAttributes( data ) {\n\t\tlet attrName, attrValue, domAttrValue, attrNs;\n\n\t\tif ( !this.attributes ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst node = data.node;\n\t\tconst revertData = data.revertData;\n\n\t\tfor ( attrName in this.attributes ) {\n\t\t\t// Current attribute value in DOM.\n\t\t\tdomAttrValue = node.getAttribute( attrName );\n\n\t\t\t// The value to be set.\n\t\t\tattrValue = this.attributes[ attrName ];\n\n\t\t\t// Save revert data.\n\t\t\tif ( revertData ) {\n\t\t\t\trevertData.attributes[ attrName ] = domAttrValue;\n\t\t\t}\n\n\t\t\t// Detect custom namespace:\n\t\t\t//\n\t\t\t//\t\tclass: {\n\t\t\t//\t\t\tns: 'abc',\n\t\t\t//\t\t\tvalue: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tattrNs = ( isObject( attrValue[ 0 ] ) && attrValue[ 0 ].ns ) ? attrValue[ 0 ].ns : null;\n\n\t\t\t// Activate binding if one is found. Cases:\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\tTemplate.bind( ... ).to( ... )\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t'bar',\n\t\t\t//\t\t\tTemplate.bind( ... ).to( ... ),\n\t\t\t//\t\t\t'baz'\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\t//\t\tclass: {\n\t\t\t//\t\t\tns: 'abc',\n\t\t\t//\t\t\tvalue: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tif ( hasTemplateBinding( attrValue ) ) {\n\t\t\t\t// Normalize attributes with additional data like namespace:\n\t\t\t\t//\n\t\t\t\t//\t\tclass: {\n\t\t\t\t//\t\t\tns: 'abc',\n\t\t\t\t//\t\t\tvalue: [ ... ]\n\t\t\t\t//\t\t}\n\t\t\t\t//\n\t\t\t\tconst valueToBind = attrNs ? attrValue[ 0 ].value : attrValue;\n\n\t\t\t\t// Extend the original value of attributes like \"style\" and \"class\",\n\t\t\t\t// don't override them.\n\t\t\t\tif ( revertData && shouldExtend( attrName ) ) {\n\t\t\t\t\tvalueToBind.unshift( domAttrValue );\n\t\t\t\t}\n\n\t\t\t\tthis._bindToObservable( {\n\t\t\t\t\tschema: valueToBind,\n\t\t\t\t\tupdater: getAttributeUpdater( node, attrName, attrNs ),\n\t\t\t\t\tdata\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Style attribute could be an Object so it needs to be parsed in a specific way.\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\twidth: '100px',\n\t\t\t//\t\t\theight: Template.bind( ... ).to( ... )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\telse if ( attrName == 'style' && typeof attrValue[ 0 ] !== 'string' ) {\n\t\t\t\tthis._renderStyleAttribute( attrValue[ 0 ], data );\n\t\t\t}\n\n\t\t\t// Otherwise simply set the static attribute:\n\t\t\t//\n\t\t\t//\t\tclass: [ 'foo' ]\n\t\t\t//\n\t\t\t//\t\tclass: [ 'all', 'are', 'static' ]\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t{\n\t\t\t//\t\t\t\tns: 'abc',\n\t\t\t//\t\t\t\tvalue: [ 'foo' ]\n\t\t\t//\t\t\t}\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\telse {\n\t\t\t\t// Extend the original value of attributes like \"style\" and \"class\",\n\t\t\t\t// don't override them.\n\t\t\t\tif ( revertData && domAttrValue && shouldExtend( attrName ) ) {\n\t\t\t\t\tattrValue.unshift( domAttrValue );\n\t\t\t\t}\n\n\t\t\t\tattrValue = attrValue\n\t\t\t\t\t// Retrieve \"values\" from:\n\t\t\t\t\t//\n\t\t\t\t\t//\t\tclass: [\n\t\t\t\t\t//\t\t\t{\n\t\t\t\t\t//\t\t\t\tns: 'abc',\n\t\t\t\t\t//\t\t\t\tvalue: [ ... ]\n\t\t\t\t\t//\t\t\t}\n\t\t\t\t\t//\t\t]\n\t\t\t\t\t//\n\t\t\t\t\t.map( val => val ? ( val.value || val ) : val )\n\t\t\t\t\t// Flatten the array.\n\t\t\t\t\t.reduce( ( prev, next ) => prev.concat( next ), [] )\n\t\t\t\t\t// Convert into string.\n\t\t\t\t\t.reduce( arrayValueReducer, '' );\n\n\t\t\t\tif ( !isFalsy( attrValue ) ) {\n\t\t\t\t\tnode.setAttributeNS( attrNs, attrName, attrValue );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Renders the `style` attribute of an HTML element based on\n\t * {@link module:ui/template~Template#attributes}.\n\t *\n\t * Style attribute is an {Object} with static values:\n\t *\n\t *\t\tattributes: {\n\t *\t\t\tstyle: {\n\t *\t\t\t\tcolor: 'red'\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * or values bound to {@link module:ui/model~Model} properties:\n\t *\n\t *\t\tattributes: {\n\t *\t\t\tstyle: {\n\t *\t\t\t\tcolor: bind.to( ... )\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * Note: `style` attribute is rendered without setting the namespace. It does not seem to be\n\t * needed.\n\t *\n\t * @private\n\t * @param {Object} styles Styles located in `attributes.style` of {@link module:ui/template~TemplateDefinition}.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderStyleAttribute( styles, data ) {\n\t\tconst node = data.node;\n\n\t\tfor ( const styleName in styles ) {\n\t\t\tconst styleValue = styles[ styleName ];\n\n\t\t\t// Cases:\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\tcolor: bind.to( 'attribute' )\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\tif ( hasTemplateBinding( styleValue ) ) {\n\t\t\t\tthis._bindToObservable( {\n\t\t\t\t\tschema: [ styleValue ],\n\t\t\t\t\tupdater: getStyleUpdater( node, styleName ),\n\t\t\t\t\tdata\n\t\t\t\t} );\n\t\t\t}\n\n\t\t\t// Cases:\n\t\t\t//\n\t\t\t//\t\tstyle: {\n\t\t\t//\t\t\tcolor: 'red'\n\t\t\t//\t\t}\n\t\t\t//\n\t\t\telse {\n\t\t\t\tnode.style[ styleName ] = styleValue;\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * Recursively renders HTML element's children from {@link module:ui/template~Template#children}.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_renderElementChildren( data ) {\n\t\tconst node = data.node;\n\t\tconst container = data.intoFragment ? document.createDocumentFragment() : node;\n\t\tconst isApplying = data.isApplying;\n\t\tlet childIndex = 0;\n\n\t\tfor ( const child of this.children ) {\n\t\t\tif ( isViewCollection( child ) ) {\n\t\t\t\tif ( !isApplying ) {\n\t\t\t\t\tchild.setParent( node );\n\n\t\t\t\t\tfor ( const view of child ) {\n\t\t\t\t\t\tcontainer.appendChild( view.element );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t} else if ( isView( child ) ) {\n\t\t\t\tif ( !isApplying ) {\n\t\t\t\t\tcontainer.appendChild( child.element );\n\t\t\t\t}\n\t\t\t} else {\n\t\t\t\tif ( isApplying ) {\n\t\t\t\t\tconst revertData = data.revertData;\n\t\t\t\t\tconst childRevertData = getEmptyRevertData();\n\n\t\t\t\t\trevertData.children.push( childRevertData );\n\n\t\t\t\t\tchild._renderNode( {\n\t\t\t\t\t\tnode: container.childNodes[ childIndex++ ],\n\t\t\t\t\t\tisApplying: true,\n\t\t\t\t\t\trevertData: childRevertData\n\t\t\t\t\t} );\n\t\t\t\t} else {\n\t\t\t\t\tcontainer.appendChild( child.render() );\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tif ( data.intoFragment ) {\n\t\t\tnode.appendChild( container );\n\t\t}\n\t}\n\n\t/**\n\t * Activates `on` event listeners from the {@link module:ui/template~TemplateDefinition}\n\t * on an HTML element.\n\t *\n\t * @protected\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t */\n\t_setUpListeners( data ) {\n\t\tif ( !this.eventListeners ) {\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const key in this.eventListeners ) {\n\t\t\tconst revertBindings = this.eventListeners[ key ].map( schemaItem => {\n\t\t\t\tconst [ domEvtName, domSelector ] = key.split( '@' );\n\n\t\t\t\treturn schemaItem.activateDomEventListener( domEvtName, domSelector, data );\n\t\t\t} );\n\n\t\t\tif ( data.revertData ) {\n\t\t\t\tdata.revertData.bindings.push( revertBindings );\n\t\t\t}\n\t\t}\n\t}\n\n\t/**\n\t * For a given {@link module:ui/template~TemplateValueSchema} containing {@link module:ui/template~TemplateBinding}\n\t * activates the binding and sets its initial value.\n\t *\n\t * Note: {@link module:ui/template~TemplateValueSchema} can be for an HTML element attributes or\n\t * text node `textContent`.\n\t *\n\t * @protected\n\t * @param {Object} options Binding options.\n\t * @param {module:ui/template~TemplateValueSchema} options.schema\n\t * @param {Function} options.updater A function which updates DOM (like attribute or text).\n\t * @param {module:ui/template~RenderData} options.data Rendering data.\n\t */\n\t_bindToObservable( { schema, updater, data } ) {\n\t\tconst revertData = data.revertData;\n\n\t\t// Set initial values.\n\t\tsyncValueSchemaValue( schema, updater, data );\n\n\t\tconst revertBindings = schema\n\t\t\t// Filter \"falsy\" (false, undefined, null, '') value schema components out.\n\t\t\t.filter( item => !isFalsy( item ) )\n\t\t\t// Filter inactive bindings from schema, like static strings ('foo'), numbers (42), etc.\n\t\t\t.filter( item => item.observable )\n\t\t\t// Once only the actual binding are left, let the emitter listen to observable change:attribute event.\n\t\t\t// TODO: Reduce the number of listeners attached as many bindings may listen\n\t\t\t// to the same observable attribute.\n\t\t\t.map( templateBinding => templateBinding.activateAttributeListener( schema, updater, data ) );\n\n\t\tif ( revertData ) {\n\t\t\trevertData.bindings.push( revertBindings );\n\t\t}\n\t}\n\n\t/**\n\t * Reverts {@link module:ui/template~RenderData#revertData template data} from a node to\n\t * return it to the the original state.\n\t *\n\t * @protected\n\t * @param {HTMLElement|Text} node A node to be reverted.\n\t * @param {module:ui/template~RenderData#revertData} revertData Stores information about\n\t * what changes have been made by {@link #apply} to the node.\n\t */\n\t_revertTemplateFromNode( node, revertData ) {\n\t\tfor ( const binding of revertData.bindings ) {\n\t\t\t// Each binding may consist of several observable+observable#attribute.\n\t\t\t// like the following has 2:\n\t\t\t//\n\t\t\t//\t\tclass: [\n\t\t\t//\t\t\t'x',\n\t\t\t//\t\t\tbind.to( 'foo' ),\n\t\t\t//\t\t\t'y',\n\t\t\t//\t\t\tbind.to( 'bar' )\n\t\t\t//\t\t]\n\t\t\t//\n\t\t\tfor ( const revertBinding of binding ) {\n\t\t\t\trevertBinding();\n\t\t\t}\n\t\t}\n\n\t\tif ( revertData.text ) {\n\t\t\tnode.textContent = revertData.text;\n\n\t\t\treturn;\n\t\t}\n\n\t\tfor ( const attrName in revertData.attributes ) {\n\t\t\tconst attrValue = revertData.attributes[ attrName ];\n\n\t\t\t// When the attribute has **not** been set before #apply().\n\t\t\tif ( attrValue === null ) {\n\t\t\t\tnode.removeAttribute( attrName );\n\t\t\t} else {\n\t\t\t\tnode.setAttribute( attrName, attrValue );\n\t\t\t}\n\t\t}\n\n\t\tfor ( let i = 0; i < revertData.children.length; ++i ) {\n\t\t\tthis._revertTemplateFromNode( node.childNodes[ i ], revertData.children[ i ] );\n\t\t}\n\t}\n}\n\nmix( Template, EmitterMixin );\n\n/**\n * Describes a binding created by {@link module:ui/template~Template.bind} interface.\n *\n * @protected\n */\nexport class TemplateBinding {\n\t/**\n\t * Creates an instance of the {@link module:ui/template~TemplateBinding} class.\n\t *\n\t * @param {module:ui/template~TemplateDefinition} def The definition of the binding.\n\t */\n\tconstructor( def ) {\n\t\tObject.assign( this, def );\n\n\t\t/**\n\t\t * An observable instance of the binding. It either:\n\t\t *\n\t\t * * provides the attribute with the value\n\t\t * * or passes the event when a corresponding DOM event is fired.\n\t\t *\n\t\t * @member {module:utils/observablemixin~ObservableMixin} module:ui/template~TemplateBinding#observable\n\t\t */\n\n\t\t/**\n\t\t * An {@link module:utils/emittermixin~Emitter} used by the binding to:\n\t\t *\n\t\t * * listen to the attribute change in the {@link module:ui/template~TemplateBinding#observable},\n\t\t * * or listen to the event in the DOM.\n\t\t *\n\t\t * @member {module:utils/emittermixin~EmitterMixin} module:ui/template~TemplateBinding#emitter\n\t\t */\n\n\t\t/**\n\t\t * The name of the {@link module:ui/template~TemplateBinding#observable observed attribute}.\n\t\t *\n\t\t * @member {String} module:ui/template~TemplateBinding#attribute\n\t\t */\n\n\t\t/**\n\t\t * A custom function to process the value of the {@link module:ui/template~TemplateBinding#attribute}.\n\t\t *\n\t\t * @member {Function} [module:ui/template~TemplateBinding#callback]\n\t\t */\n\t}\n\n\t/**\n\t * Returns the value of the binding. It is the value of the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}. The value may be processed by the\n\t * {@link module:ui/template~TemplateBinding#callback}, if such has been passed to the binding.\n\t *\n\t * @param {Node} [node] A native DOM node, passed to the custom {@link module:ui/template~TemplateBinding#callback}.\n\t * @returns {*} The value of {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}.\n\t */\n\tgetValue( node ) {\n\t\tconst value = this.observable[ this.attribute ];\n\n\t\treturn this.callback ? this.callback( value, node ) : value;\n\t}\n\n\t/**\n\t * Activates the listener which waits for changes of the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable}, then updates the DOM with the aggregated\n\t * value of {@link module:ui/template~TemplateValueSchema}.\n\t *\n\t * @param {module:ui/template~TemplateValueSchema} schema A full schema to generate an attribute or text in DOM.\n\t * @param {Function} updater A DOM updater function used to update native DOM attribute or text.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t * @returns {Function} A function to sever the listener binding.\n\t */\n\tactivateAttributeListener( schema, updater, data ) {\n\t\tconst callback = () => syncValueSchemaValue( schema, updater, data );\n\n\t\tthis.emitter.listenTo( this.observable, 'change:' + this.attribute, callback );\n\n\t\t// Allows revert of the listener.\n\t\treturn () => {\n\t\t\tthis.emitter.stopListening( this.observable, 'change:' + this.attribute, callback );\n\t\t};\n\t}\n}\n\n/**\n * Describes either:\n *\n * * a binding to an {@link module:utils/observablemixin~Observable},\n * * or a native DOM event binding.\n *\n * It is created by the {@link module:ui/template~BindChain#to} method.\n *\n * @protected\n */\nexport class TemplateToBinding extends TemplateBinding {\n\t/**\n\t * Activates the listener for the native DOM event, which when fired, is propagated by\n\t * the {@link module:ui/template~TemplateBinding#emitter}.\n\t *\n\t * @param {String} domEvtName A name of the native DOM event.\n\t * @param {String} domSelector A selector in DOM to filter delegated events.\n\t * @param {module:ui/template~RenderData} data Rendering data.\n\t * @returns {Function} A function to sever the listener binding.\n\t */\n\tactivateDomEventListener( domEvtName, domSelector, data ) {\n\t\tconst callback = ( evt, domEvt ) => {\n\t\t\tif ( !domSelector || domEvt.target.matches( domSelector ) ) {\n\t\t\t\tif ( typeof this.eventNameOrFunction == 'function' ) {\n\t\t\t\t\tthis.eventNameOrFunction( domEvt );\n\t\t\t\t} else {\n\t\t\t\t\tthis.observable.fire( this.eventNameOrFunction, domEvt );\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t\tthis.emitter.listenTo( data.node, domEvtName, callback );\n\n\t\t// Allows revert of the listener.\n\t\treturn () => {\n\t\t\tthis.emitter.stopListening( data.node, domEvtName, callback );\n\t\t};\n\t}\n}\n\n/**\n * Describes a binding to {@link module:utils/observablemixin~ObservableMixin} created by {@link module:ui/template~BindChain#if}\n * method.\n *\n * @protected\n */\nexport class TemplateIfBinding extends TemplateBinding {\n\t/**\n\t * @inheritDoc\n\t */\n\tgetValue( node ) {\n\t\tconst value = super.getValue( node );\n\n\t\treturn isFalsy( value ) ? false : ( this.valueIfTrue || true );\n\t}\n\n\t/**\n\t * The value of the DOM attribute/text to be set if the {@link module:ui/template~TemplateBinding#attribute} in\n\t * {@link module:ui/template~TemplateBinding#observable} is `true`.\n\t *\n\t * @member {String} [module:ui/template~TemplateIfBinding#valueIfTrue]\n\t */\n}\n\n// Checks whether given {@link module:ui/template~TemplateValueSchema} contains a\n// {@link module:ui/template~TemplateBinding}.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @returns {Boolean}\nfunction hasTemplateBinding( schema ) {\n\tif ( !schema ) {\n\t\treturn false;\n\t}\n\n\t// Normalize attributes with additional data like namespace:\n\t//\n\t//\t\tclass: {\n\t//\t\t\tns: 'abc',\n\t//\t\t\tvalue: [ ... ]\n\t//\t\t}\n\t//\n\tif ( schema.value ) {\n\t\tschema = schema.value;\n\t}\n\n\tif ( Array.isArray( schema ) ) {\n\t\treturn schema.some( hasTemplateBinding );\n\t} else if ( schema instanceof TemplateBinding ) {\n\t\treturn true;\n\t}\n\n\treturn false;\n}\n\n// Assembles the value using {@link module:ui/template~TemplateValueSchema} and stores it in a form of\n// an Array. Each entry of an Array corresponds to one of {@link module:ui/template~TemplateValueSchema}\n// items.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @param {Node} node DOM Node updated when {@link module:utils/observablemixin~ObservableMixin} changes.\n// @return {Array}\nfunction getValueSchemaValue( schema, node ) {\n\treturn schema.map( schemaItem => {\n\t\t// Process {@link module:ui/template~TemplateBinding} bindings.\n\t\tif ( schemaItem instanceof TemplateBinding ) {\n\t\t\treturn schemaItem.getValue( node );\n\t\t}\n\n\t\t// All static values like strings, numbers, and \"falsy\" values (false, null, undefined, '', etc.) just pass.\n\t\treturn schemaItem;\n\t} );\n}\n\n// A function executed each time bound Observable attribute changes, which updates DOM with a value\n// constructed from {@link module:ui/template~TemplateValueSchema}.\n//\n// @param {module:ui/template~TemplateValueSchema} schema\n// @param {Function} updater A function which updates DOM (like attribute or text).\n// @param {Node} node DOM Node updated when {@link module:utils/observablemixin~ObservableMixin} changes.\nfunction syncValueSchemaValue( schema, updater, { node } ) {\n\tlet value = getValueSchemaValue( schema, node );\n\n\t// Check if schema is a single Template.bind.if, like:\n\t//\n\t//\t\tclass: Template.bind.if( 'foo' )\n\t//\n\tif ( schema.length == 1 && schema[ 0 ] instanceof TemplateIfBinding ) {\n\t\tvalue = value[ 0 ];\n\t} else {\n\t\tvalue = value.reduce( arrayValueReducer, '' );\n\t}\n\n\tif ( isFalsy( value ) ) {\n\t\tupdater.remove();\n\t} else {\n\t\tupdater.set( value );\n\t}\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of DOM Node to set or reset `textContent`.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @returns {Object}\nfunction getTextUpdater( node ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tnode.textContent = value;\n\t\t},\n\n\t\tremove() {\n\t\t\tnode.textContent = '';\n\t\t}\n\t};\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of DOM Node to set or reset an attribute.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @param {String} attrName Name of the attribute to be modified.\n// @param {String} [ns=null] Namespace to use.\n// @returns {Object}\nfunction getAttributeUpdater( el, attrName, ns ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tel.setAttributeNS( ns, attrName, value );\n\t\t},\n\n\t\tremove() {\n\t\t\tel.removeAttributeNS( ns, attrName );\n\t\t}\n\t};\n}\n\n// Returns an object consisting of `set` and `remove` functions, which\n// can be used in the context of CSSStyleDeclaration to set or remove a style.\n// @see module:ui/view~View#_bindToObservable\n//\n// @param {Node} node DOM Node to be modified.\n// @param {String} styleName Name of the style to be modified.\n// @returns {Object}\nfunction getStyleUpdater( el, styleName ) {\n\treturn {\n\t\tset( value ) {\n\t\t\tel.style[ styleName ] = value;\n\t\t},\n\n\t\tremove() {\n\t\t\tel.style[ styleName ] = null;\n\t\t}\n\t};\n}\n\n// Clones definition of the template.\n//\n// @param {module:ui/template~TemplateDefinition} def\n// @returns {module:ui/template~TemplateDefinition}\nfunction clone( def ) {\n\tconst clone = cloneDeepWith( def, value => {\n\t\t// Don't clone the `Template.bind`* bindings because of the references to Observable\n\t\t// and DomEmitterMixin instances inside, which would also be traversed and cloned by greedy\n\t\t// cloneDeepWith algorithm. There's no point in cloning Observable/DomEmitterMixins\n\t\t// along with the definition.\n\t\t//\n\t\t// Don't clone Template instances if provided as a child. They're simply #render()ed\n\t\t// and nothing should interfere.\n\t\t//\n\t\t// Also don't clone View instances if provided as a child of the Template. The template\n\t\t// instance will be extracted from the View during the normalization and there's no need\n\t\t// to clone it.\n\t\tif ( value && ( value instanceof TemplateBinding || isTemplate( value ) || isView( value ) || isViewCollection( value ) ) ) {\n\t\t\treturn value;\n\t\t}\n\t} );\n\n\treturn clone;\n}\n\n// Normalizes given {@link module:ui/template~TemplateDefinition}.\n//\n// See:\n// * {@link normalizeAttributes}\n// * {@link normalizeListeners}\n// * {@link normalizePlainTextDefinition}\n// * {@link normalizeTextDefinition}\n//\n// @param {module:ui/template~TemplateDefinition} def\n// @returns {module:ui/template~TemplateDefinition} Normalized definition.\nfunction normalize( def ) {\n\tif ( typeof def == 'string' ) {\n\t\tdef = normalizePlainTextDefinition( def );\n\t} else if ( def.text ) {\n\t\tnormalizeTextDefinition( def );\n\t}\n\n\tif ( def.on ) {\n\t\tdef.eventListeners = normalizeListeners( def.on );\n\n\t\t// Template mixes EmitterMixin, so delete #on to avoid collision.\n\t\tdelete def.on;\n\t}\n\n\tif ( !def.text ) {\n\t\tif ( def.attributes ) {\n\t\t\tnormalizeAttributes( def.attributes );\n\t\t}\n\n\t\tconst children = new ViewCollection();\n\n\t\tif ( def.children ) {\n\t\t\tif ( isViewCollection( def.children ) ) {\n\t\t\t\tchildren.add( def.children );\n\t\t\t} else {\n\t\t\t\tfor ( const child of def.children ) {\n\t\t\t\t\tif ( isTemplate( child ) || isView( child ) ) {\n\t\t\t\t\t\tchildren.add( child );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tchildren.add( new Template( child ) );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tdef.children = children;\n\t}\n\n\treturn def;\n}\n\n// Normalizes \"attributes\" section of {@link module:ui/template~TemplateDefinition}.\n//\n//\t\tattributes: {\n//\t\t\ta: 'bar',\n//\t\t\tb: {@link module:ui/template~TemplateBinding},\n//\t\t\tc: {\n//\t\t\t\tvalue: 'bar'\n//\t\t\t}\n//\t\t}\n//\n// becomes\n//\n//\t\tattributes: {\n//\t\t\ta: [ 'bar' ],\n//\t\t\tb: [ {@link module:ui/template~TemplateBinding} ],\n//\t\t\tc: {\n//\t\t\t\tvalue: [ 'bar' ]\n//\t\t\t}\n//\t\t}\n//\n// @param {Object} attrs\nfunction normalizeAttributes( attrs ) {\n\tfor ( const a in attrs ) {\n\t\tif ( attrs[ a ].value ) {\n\t\t\tattrs[ a ].value = [].concat( attrs[ a ].value );\n\t\t}\n\n\t\tarrayify( attrs, a );\n\t}\n}\n\n// Normalizes \"on\" section of {@link module:ui/template~TemplateDefinition}.\n//\n//\t\ton: {\n//\t\t\ta: 'bar',\n//\t\t\tb: {@link module:ui/template~TemplateBinding},\n//\t\t\tc: [ {@link module:ui/template~TemplateBinding}, () => { ... } ]\n//\t\t}\n//\n// becomes\n//\n//\t\ton: {\n//\t\t\ta: [ 'bar' ],\n//\t\t\tb: [ {@link module:ui/template~TemplateBinding} ],\n//\t\t\tc: [ {@link module:ui/template~TemplateBinding}, () => { ... } ]\n//\t\t}\n//\n// @param {Object} listeners\n// @returns {Object} Object containing normalized listeners.\nfunction normalizeListeners( listeners ) {\n\tfor ( const l in listeners ) {\n\t\tarrayify( listeners, l );\n\t}\n\n\treturn listeners;\n}\n\n// Normalizes \"string\" {@link module:ui/template~TemplateDefinition}.\n//\n//\t\t\"foo\"\n//\n// becomes\n//\n//\t\t{ text: [ 'foo' ] },\n//\n// @param {String} def\n// @returns {module:ui/template~TemplateDefinition} Normalized template definition.\nfunction normalizePlainTextDefinition( def ) {\n\treturn {\n\t\ttext: [ def ]\n\t};\n}\n\n// Normalizes text {@link module:ui/template~TemplateDefinition}.\n//\n//\t\tchildren: [\n//\t\t\t{ text: 'def' },\n//\t\t\t{ text: {@link module:ui/template~TemplateBinding} }\n//\t\t]\n//\n// becomes\n//\n//\t\tchildren: [\n//\t\t\t{ text: [ 'def' ] },\n//\t\t\t{ text: [ {@link module:ui/template~TemplateBinding} ] }\n//\t\t]\n//\n// @param {module:ui/template~TemplateDefinition} def\nfunction normalizeTextDefinition( def ) {\n\tif ( !Array.isArray( def.text ) ) {\n\t\tdef.text = [ def.text ];\n\t}\n}\n\n// Wraps an entry in Object in an Array, if not already one.\n//\n//\t\t{\n//\t\t\tx: 'y',\n//\t\t\ta: [ 'b' ]\n//\t\t}\n//\n// becomes\n//\n//\t\t{\n//\t\t\tx: [ 'y' ],\n//\t\t\ta: [ 'b' ]\n//\t\t}\n//\n// @param {Object} obj\n// @param {String} key\nfunction arrayify( obj, key ) {\n\tif ( !Array.isArray( obj[ key ] ) ) {\n\t\tobj[ key ] = [ obj[ key ] ];\n\t}\n}\n\n// A helper which concatenates the value avoiding unwanted\n// leading white spaces.\n//\n// @param {String} prev\n// @param {String} cur\n// @returns {String}\nfunction arrayValueReducer( prev, cur ) {\n\tif ( isFalsy( cur ) ) {\n\t\treturn prev;\n\t} else if ( isFalsy( prev ) ) {\n\t\treturn cur;\n\t} else {\n\t\treturn `${ prev } ${ cur }`;\n\t}\n}\n\n// Extends one object defined in the following format:\n//\n//\t\t{\n//\t\t\tkey1: [Array1],\n//\t\t\tkey2: [Array2],\n//\t\t\t...\n//\t\t\tkeyN: [ArrayN]\n//\t\t}\n//\n// with another object of the same data format.\n//\n// @param {Object} obj Base object.\n// @param {Object} ext Object extending base.\n// @returns {String}\nfunction extendObjectValueArray( obj, ext ) {\n\tfor ( const a in ext ) {\n\t\tif ( obj[ a ] ) {\n\t\t\tobj[ a ].push( ...ext[ a ] );\n\t\t} else {\n\t\t\tobj[ a ] = ext[ a ];\n\t\t}\n\t}\n}\n\n// A helper for {@link module:ui/template~Template#extend}. Recursively extends {@link module:ui/template~Template} instance\n// with content from {module:ui/template~TemplateDefinition}. See {@link module:ui/template~Template#extend} to learn more.\n//\n// @param {module:ui/template~Template} def A template instance to be extended.\n// @param {module:ui/template~TemplateDefinition} def A definition which is to extend the template instance.\nfunction extendTemplate( template, def ) {\n\tif ( def.attributes ) {\n\t\tif ( !template.attributes ) {\n\t\t\ttemplate.attributes = {};\n\t\t}\n\n\t\textendObjectValueArray( template.attributes, def.attributes );\n\t}\n\n\tif ( def.eventListeners ) {\n\t\tif ( !template.eventListeners ) {\n\t\t\ttemplate.eventListeners = {};\n\t\t}\n\n\t\textendObjectValueArray( template.eventListeners, def.eventListeners );\n\t}\n\n\tif ( def.text ) {\n\t\ttemplate.text.push( ...def.text );\n\t}\n\n\tif ( def.children && def.children.length ) {\n\t\tif ( template.children.length != def.children.length ) {\n\t\t\t/**\n\t\t\t * The number of children in extended definition does not match.\n\t\t\t *\n\t\t\t * @error ui-template-extend-children-mismatch\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'ui-template-extend-children-mismatch: The number of children in extended definition does not match.'\n\t\t\t);\n\t\t}\n\n\t\tlet childIndex = 0;\n\n\t\tfor ( const childDef of def.children ) {\n\t\t\textendTemplate( template.children.get( childIndex++ ), childDef );\n\t\t}\n\t}\n}\n\n// Checks if value is \"falsy\".\n// Note: 0 (Number) is not \"falsy\" in this context.\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isFalsy( value ) {\n\treturn !value && value !== 0;\n}\n\n// Checks if the item is an instance of {@link module:ui/view~View}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isView( item ) {\n\treturn item instanceof View;\n}\n\n// Checks if the item is an instance of {@link module:ui/template~Template}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isTemplate( item ) {\n\treturn item instanceof Template;\n}\n\n// Checks if the item is an instance of {@link module:ui/viewcollection~ViewCollection}\n//\n// @private\n// @param {*} value Value to be checked.\nfunction isViewCollection( item ) {\n\treturn item instanceof ViewCollection;\n}\n\n// Creates an empty skeleton for {@link module:ui/template~Template#revert}\n// data.\n//\n// @private\nfunction getEmptyRevertData() {\n\treturn {\n\t\tchildren: [],\n\t\tbindings: [],\n\t\tattributes: {}\n\t};\n}\n\n// Checks whether an attribute should be extended when\n// {@link module:ui/template~Template#apply} is called.\n//\n// @private\n// @param {String} attrName Attribute name to check.\nfunction shouldExtend( attrName ) {\n\treturn attrName == 'class' || attrName == 'style';\n}\n\n/**\n * A definition of the {@link module:ui/template~Template}. It describes what kind of\n * node a template will render (HTML element or text), attributes of an element, DOM event\n * listeners and children.\n *\n * Also see:\n * * {@link module:ui/template~TemplateValueSchema} to learn about HTML element attributes,\n * * {@link module:ui/template~TemplateListenerSchema} to learn about DOM event listeners.\n *\n * A sample definition on an HTML element can look like this:\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tchildren: [\n *\t\t\t\t{\n *\t\t\t\t\ttag: 'span',\n *\t\t\t\t\tattributes: { ... },\n *\t\t\t\t\tchildren: [ ... ],\n *\t\t\t\t},\n *\t\t\t\t{\n *\t\t\t\t\ttext: 'static–text'\n *\t\t\t\t},\n *\t\t\t\t'also-static–text',\n *\t\t\t],\n *\t\t\tattributes: {\n *\t\t\t\tclass: {@link module:ui/template~TemplateValueSchema},\n *\t\t\t\tid: {@link module:ui/template~TemplateValueSchema},\n *\t\t\t\tstyle: {@link module:ui/template~TemplateValueSchema}\n *\n *\t\t\t\t// ...\n *\t\t\t},\n *\t\t\ton: {\n *\t\t\t\t'click': {@link module:ui/template~TemplateListenerSchema}\n *\n *\t\t\t\t// Document.querySelector format is also accepted.\n *\t\t\t\t'keyup@a.some-class': {@link module:ui/template~TemplateListenerSchema}\n *\n *\t\t\t\t// ...\n *\t\t\t}\n *\t\t} );\n *\n * A {@link module:ui/view~View} or another {@link module:ui/template~Template} can also become a child\n * of a template. In case of a view {@link module:ui/view~View#element} is used:\n *\n *\t\tconst view = new SomeView();\n *\t\tconst childTemplate = new Template( { ... } );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\n *\t\t\tchildren: [\n *\t\t\t\t// view#element will be added as a child of this

.\n *\t\t\t\tview,\n *\n * \t\t\t\t// The output of childTemplate.render() will be added here.\n *\t\t\t\tchildTemplate\n *\t\t\t]\n *\t\t} );\n *\n * An entire {@link module:ui/viewcollection~ViewCollection} can be used as a child in the definition:\n *\n *\t\tconst collection = new ViewCollection();\n *\t\tcollection.add( someView );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\n *\t\t\tchildren: collection\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateDefinition\n * @type Object\n *\n * @property {String} tag See template {@link module:ui/template~Template#tag} property.\n *\n * @property {Array.} [children]\n * See template {@link module:ui/template~Template#children} property.\n *\n * @property {Object.} [attributes]\n * See template {@link module:ui/template~Template#attributes} property.\n *\n * @property {String|module:ui/template~TemplateValueSchema|Array.} [text]\n * See template {@link module:ui/template~Template#text} property.\n *\n * @property {Object.} [on]\n * See template {@link module:ui/template~Template#eventListeners} property.\n */\n\n/**\n * Describes a value of an HTML element attribute or `textContent`. It allows combining multiple\n * data sources like static values and {@link module:utils/observablemixin~Observable} attributes.\n *\n * Also see:\n * * {@link module:ui/template~TemplateDefinition} to learn where to use it,\n * * {@link module:ui/template~Template.bind} to learn how to configure\n * {@link module:utils/observablemixin~Observable} attribute bindings,\n * * {@link module:ui/template~Template#render} to learn how to render a template,\n * * {@link module:ui/template~BindChain#to `to()`} and {@link module:ui/template~BindChain#if `if()`}\n * methods to learn more about bindings.\n *\n * Attribute values can be described in many different ways:\n *\n *\t\t// Bind helper will create bindings to attributes of the observable.\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\t// A plain string schema.\n *\t\t\t\t'class': 'static-text',\n *\n *\t\t\t\t// An object schema, binds to the \"foo\" attribute of the\n *\t\t\t\t// observable and follows its value.\n *\t\t\t\t'class': bind.to( 'foo' ),\n *\n *\t\t\t\t// An array schema, combines the above.\n *\t\t\t\t'class': [\n *\t\t\t\t\t'static-text',\n *\t\t\t\t\tbind.to( 'bar', () => { ... } ),\n *\n * \t\t\t\t\t// Bindings can also be conditional.\n *\t\t\t\t\tbind.if( 'baz', 'class-when-baz-is-true' )\n *\t\t\t\t],\n *\n *\t\t\t\t// An array schema, with a custom namespace, e.g. useful for creating SVGs.\n *\t\t\t\t'class': {\n *\t\t\t\t\tns: 'http://ns.url',\n *\t\t\t\t\tvalue: [\n *\t\t\t\t\t\tbind.if( 'baz', 'value-when-true' ),\n *\t\t\t\t\t\t'static-text'\n *\t\t\t\t\t]\n *\t\t\t\t},\n *\n *\t\t\t\t// An object schema, specific for styles.\n *\t\t\t\tstyle: {\n *\t\t\t\t\tcolor: 'red',\n *\t\t\t\t\tbackgroundColor: bind.to( 'qux', () => { ... } )\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n * Text nodes can also be have complex values:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\t// Will render a \"foo\" text node.\n *\t\tnew Template( {\n *\t\t\ttext: 'foo'\n *\t\t} );\n *\n *\t\t// Will render a \"static text: {observable.foo}\" text node.\n *\t\t// The text of the node will be updated as the \"foo\" attribute changes.\n *\t\tnew Template( {\n *\t\t\ttext: [\n *\t\t\t\t'static text: ',\n *\t\t\t\tbind.to( 'foo', () => { ... } )\n *\t\t\t]\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateValueSchema\n * @type {Object|String|Array}\n */\n\n/**\n * Describes an event listener attached to an HTML element. Such listener can propagate DOM events\n * through an {@link module:utils/observablemixin~Observable} instance, execute custom callbacks\n * or both, if necessary.\n *\n * Also see:\n * * {@link module:ui/template~TemplateDefinition} to learn more about template definitions,\n * * {@link module:ui/template~BindChain#to `to()`} method, to learn more about bindings.\n *\n * Check out different ways of attaching event listeners below:\n *\n *\t\t// Bind helper will propagate events through the observable.\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\ton: {\n *\t\t\t\t// An object schema. The observable will fire 'clicked' event upon DOM 'click'.\n *\t\t\t\tclick: bind.to( 'clicked' )\n *\n *\t\t\t\t// An object schema. It will work for \"click\" event on \"a.foo\" children only.\n *\t\t\t\t'click@a.foo': bind.to( 'clicked' )\n *\n *\t\t\t\t// An array schema, makes the observable propagate multiple events.\n *\t\t\t\tclick: [\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\t\t\t\t\tbind.to( 'executed' )\n *\t\t\t\t],\n *\n *\t\t\t\t// An array schema with a custom callback.\n *\t\t\t\t'click@a.foo': {\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\t\t\t\t\tbind.to( evt => {\n *\t\t\t\t\t\tconsole.log( `${ evt.target } has been clicked!` );\n *\t\t\t\t\t} }\n *\t\t\t\t}\n *\t\t\t}\n *\t\t} );\n *\n * @typedef module:ui/template~TemplateListenerSchema\n * @type {Object|String|Array}\n */\n\n/**\n * The return value of {@link ~Template.bind `Template.bind()`}. It provides `to()` and `if()`\n * methods to create {@link module:utils/observablemixin~Observable observable} attribute and event bindings.\n *\n * @interface module:ui/template~BindChain\n */\n\n/**\n * Binds an {@link module:utils/observablemixin~Observable observable} to either:\n *\n * * an HTML element attribute or a text node `textContent` so remains in sync with the observable\n * attribute as it changes,\n * * or an HTML element DOM event, so the DOM events are propagated through an observable.\n *\n * Some common use–cases of `to()` bindings are presented below:\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'p',\n *\t\t\tattributes: {\n *\t\t\t\t// class=\"...\" attribute gets bound to `observable#a`\n *\t\t\t\tclass: bind.to( 'a' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t//

...

gets bound to observable#b; always `toUpperCase()`.\n *\t\t\t\t{\n *\t\t\t\t\ttext: bind.to( 'b', ( value, node ) => value.toUpperCase() )\n *\t\t\t\t}\n *\t\t\t],\n *\t\t\ton: {\n *\t\t\t\tclick: [\n *\t\t\t\t\t// an observable will fire \"clicked\" upon \"click\" in DOM.\n *\t\t\t\t\tbind.to( 'clicked' ),\n *\n *\t\t\t\t\t// A custom callback will be executed upon \"click\" in DOM.\n *\t\t\t\t\tbind.to( () => {\n *\t\t\t\t\t\t...\n *\t\t\t\t\t} )\n *\t\t\t\t]\n *\t\t\t}\n *\t\t} ).render();\n *\n * Learn more about using `to()` in the {@link module:ui/template~TemplateValueSchema} and\n * {@link module:ui/template~TemplateListenerSchema}.\n *\n * @method #to\n * @param {String|Function} eventNameOrFunctionOrAttribute An attribute name of\n * {@link module:utils/observablemixin~Observable} or a DOM event name or an event callback.\n * @param {Function} [callback] Allows processing of the value. Accepts `Node` and `value` as arguments.\n * @return {module:ui/template~TemplateBinding}\n */\n\n/**\n * Binds an {@link module:utils/observablemixin~Observable observable} to an HTML element attribute or a text\n * node `textContent` so remains in sync with the observable attribute as it changes.\n *\n * Unlike {@link module:ui/template~BindChain#to}, it controls the presence of the attribute/`textContent`\n * depending on the \"falseness\" of an {@link module:utils/observablemixin~Observable} attribute.\n *\n *\t\tconst bind = Template.bind( observable, emitter );\n *\n *\t\tnew Template( {\n *\t\t\ttag: 'input',\n *\t\t\tattributes: {\n *\t\t\t\t// when `observable#a` is not undefined/null/false/''\n *\t\t\t\t// when `observable#a` is undefined/null/false\n *\t\t\t\tchecked: bind.if( 'a' )\n *\t\t\t},\n *\t\t\tchildren: [\n *\t\t\t\t{\n *\t\t\t\t\t// \"b-is-not-set\" when `observable#b` is undefined/null/false/''\n *\t\t\t\t\t// when `observable#b` is not \"falsy\"\n *\t\t\t\t\ttext: bind.if( 'b', 'b-is-not-set', ( value, node ) => !value )\n *\t\t\t\t}\n *\t\t\t]\n *\t\t} ).render();\n *\n * Learn more about using `if()` in the {@link module:ui/template~TemplateValueSchema}.\n *\n * @method #if\n * @param {String} attribute An attribute name of {@link module:utils/observablemixin~Observable} used in the binding.\n * @param {String} [valueIfTrue] Value set when {@link module:utils/observablemixin~Observable} attribute is not\n * undefined/null/false/'' (empty string).\n * @param {Function} [callback] Allows processing of the value. Accepts `Node` and `value` as arguments.\n * @return {module:ui/template~TemplateBinding}\n */\n\n/**\n * The {@link module:ui/template~Template#_renderNode} configuration.\n *\n * @private\n * @interface module:ui/template~RenderData\n */\n\n/**\n * Tells {@link module:ui/template~Template#_renderNode} to render\n * children into `DocumentFragment` first and then append the fragment\n * to the parent element. It's a speed optimization.\n *\n * @member {Boolean} #intoFragment\n */\n\n/**\n * A node which is being rendered.\n *\n * @member {HTMLElement|Text} #node\n */\n\n/**\n * Indicates whether the {@module:ui/template~RenderNodeOptions#node} has\n * been provided by {@module:ui/template~Template#apply}.\n *\n * @member {Boolean} #isApplying\n */\n\n/**\n * An object storing the data that helps {@module:ui/template~Template#revert}\n * bringing back an element to its initial state, i.e. before\n * {@module:ui/template~Template#apply} was called.\n *\n * @member {Object} #revertData\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-ui/src/template.js\n// module id = 6\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module ui/view\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport ViewCollection from './viewcollection';\nimport Template from './template';\nimport DomEmitterMixin from '@ckeditor/ckeditor5-utils/src/dom/emittermixin';\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport Collection from '@ckeditor/ckeditor5-utils/src/collection';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\n\n/**\n * The basic view class, which represents an HTML element created out of a\n * {@link module:ui/view~View#template}. Views are building blocks of the user interface and handle\n * interaction\n *\n * Views {@link module:ui/view~View#addChildren aggregate} children in\n * {@link module:ui/view~View#createCollection collections} and manage the life cycle of DOM\n * listeners e.g. by handling initialization and destruction.\n *\n * See the {@link module:ui/template~TemplateDefinition} syntax to learn more about shaping view\n * elements, attributes and listeners.\n *\n *\t\tclass SampleView extends View {\n *\t\t\tconstructor( locale ) {\n *\t\t\t\tsuper( locale );\n *\n *\t\t\t\tconst bind = this.bindTemplate;\n *\n *\t\t\t\t// Views define their interface (state) using observable attributes.\n *\t\t\t\tthis.set( 'elementClass', 'bar' );\n *\n *\t\t\t\tthis.template = new Template( {\n *\t\t\t\t\ttag: 'p',\n *\n *\t\t\t\t\t// The element of the view can be defined with its children.\n *\t\t\t\t\tchildren: [\n *\t\t\t\t\t\t'Hello',\n *\t\t\t\t\t\t{\n *\t\t\t\t\t\t\ttag: 'b',\n *\t\t\t\t\t\t\tchildren: [ 'world!' ]\n *\t\t\t\t\t\t}\n *\t\t\t\t\t],\n *\t\t\t\t\tattributes: {\n *\t\t\t\t\t\tclass: [\n *\t\t\t\t\t\t\t'foo',\n *\n *\t\t\t\t\t\t\t// Observable attributes control the state of the view in DOM.\n *\t\t\t\t\t\t\tbind.to( 'elementClass' )\n *\t\t\t\t\t\t]\n *\t\t\t\t\t},\n *\t\t\t\t\ton: {\n *\t\t\t\t\t\t// Views listen to DOM events and propagate them.\n *\t\t\t\t\t\tclick: bind.to( 'clicked' )\n *\t\t\t\t\t}\n *\t\t\t\t} );\n *\t\t\t}\n *\t\t}\n *\n *\t\tconst view = new SampleView( locale );\n *\n *\t\t// Each view must be first initialized.\n *\t\tview.init();\n *\n *\t\t// Append

Helloworld

to the \n *\t\tdocument.body.appendChild( view.element );\n *\n *\t\t// Change the class attribute to

Helloworld

\n *\t\tview.elementClass = 'baz';\n *\n *\t\t// Respond to the \"click\" event in DOM by executing a custom action.\n *\t\tview.on( 'clicked', () => {\n *\t\t\tconsole.log( 'The view has been clicked!' );\n *\t\t} );\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class View {\n\t/**\n\t * Creates an instance of the {@link module:ui/view~View} class.\n\t *\n\t * Also see {@link #init}.\n\t *\n\t * @param {module:utils/locale~Locale} [locale] The localization services instance.\n\t */\n\tconstructor( locale ) {\n\t\t/**\n\t\t * A set of tools to localize the user interface.\n\t\t *\n\t\t * Also see {@link module:core/editor/editor~Editor#locale}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:utils/locale~Locale}\n\t\t */\n\t\tthis.locale = locale;\n\n\t\t/**\n\t\t * Shorthand for {@link module:utils/locale~Locale#t}.\n\t\t *\n\t\t * Note: If {@link #locale} instance hasn't been passed to the view this method may not\n\t\t * be available.\n\t\t *\n\t\t * @see module:utils/locale~Locale#t\n\t\t * @method\n\t\t */\n\t\tthis.t = locale && locale.t;\n\n\t\t/**\n\t\t * A flag set `true` after {@link #init initialization}. Because the process can be\n\t\t * asynchronous, this {@link module:utils/observablemixin~Observable observable} flag allows\n\t\t * deferring certain actions until it is finished.\n\t\t *\n\t\t * @readonly\n\t\t * @observable\n\t\t * @member {Boolean} #ready\n\t\t */\n\t\tthis.set( 'ready', false );\n\n\t\t/**\n\t\t * Collections registered with {@link #createCollection}.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set.}\n\t\t */\n\t\tthis._viewCollections = new Collection();\n\n\t\t/**\n\t\t * A collection of view instances, which have been added directly\n\t\t * into the {@link module:ui/template~Template#children}.\n\t\t *\n\t\t * @protected\n\t\t * @member {module:ui/viewcollection~ViewCollection}\n\t\t */\n\t\tthis._unboundChildren = this.createCollection();\n\n\t\t// Pass parent locale to its children.\n\t\tthis._viewCollections.on( 'add', ( evt, collection ) => {\n\t\t\tcollection.locale = locale;\n\t\t} );\n\n\t\t/**\n\t\t * Template of this view. It provides the {@link #element} representing\n\t\t * the view in DOM.\n\t\t *\n\t\t * @member {module:ui/template~Template} #template\n\t\t */\n\n\t\t/**\n\t\t * An internal, cached element of this view. See {@link #element}.\n\t\t *\n\t\t * @private\n\t\t * @member {HTMLElement} #_element\n\t\t */\n\n\t\t/**\n\t\t * Cached {@link @link module:ui/template~BindChain bind chain} object created by the\n\t\t * {@link #template}. See {@link #bindTemplate}.\n\t\t *\n\t\t * @private\n\t\t * @member {Object} #_bindTemplate\n\t\t */\n\t}\n\n\t/**\n\t * An HTML element of this view. The element is rendered on first reference\n\t * by the {@link #template}:\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor() {\n\t *\t\t\t\tsuper();\n\t *\n\t *\t\t\t\t// A template instance the #element will be created from.\n\t *\t\t\t\tthis.template = new Template( {\n\t *\t\t\t\t\ttag: 'p'\n\t *\n\t *\t\t\t\t\t// ...\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView();\n\t *\t\tview.init();\n\t *\n\t *\t\t// Renders the #template and appends the output to .\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t * The element of the view can also be assigned directly:\n\t *\n\t *\t\tview.element = document.querySelector( '#my-container' );\n\t *\n\t * @type {HTMLElement}\n\t */\n\tget element() {\n\t\tif ( this._element ) {\n\t\t\treturn this._element;\n\t\t}\n\n\t\t// No template means no element (a virtual view).\n\t\tif ( !this.template ) {\n\t\t\treturn null;\n\t\t}\n\n\t\tthis._addTemplateChildren();\n\n\t\treturn ( this._element = this.template.render() );\n\t}\n\n\tset element( el ) {\n\t\tthis._element = el;\n\t}\n\n\t/**\n\t * Shorthand for {@link module:ui/template~Template.bind}, a binding\n\t * {@link module:ui/template~BindChain interface} pre–configured for the view instance.\n\t *\n\t * It provides {@link module:ui/template~BindChain#to `to()`} and\n\t * {@link module:ui/template~BindChain#if `if()`} methods that initialize bindings with\n\t * observable attributes and attach DOM listeners.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tconst bind = this.bindTemplate;\n\t *\n\t *\t\t\t\t// These {@link module:utils/observablemixin~Observable observable} attributes will control\n\t *\t\t\t\t// the state of the view in DOM.\n\t *\t\t\t\tthis.set( {\n\t *\t\t\t\t\telementClass: 'foo',\n\t *\t\t\t\t \tisEnabled: true\n\t *\t\t\t\t } );\n\t *\n\t *\t\t\t\tthis.template = new Template( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n\t *\t\t\t\t\tattributes: {\n\t *\t\t\t\t\t\t// The class HTML attribute will follow elementClass\n\t *\t\t\t\t\t\t// and isEnabled view attributes.\n\t *\t\t\t\t\t\tclass: [\n\t *\t\t\t\t\t\t\tbind.to( 'elementClass' )\n\t *\t\t\t\t\t\t\tbind.if( 'isEnabled', 'present-when-enabled' )\n\t *\t\t\t\t\t\t]\n\t *\t\t\t\t\t},\n\t *\n\t *\t\t\t\t\ton: {\n\t *\t\t\t\t\t\t// The view will fire the \"clicked\" event upon clicking

in DOM.\n\t *\t\t\t\t\t\tclick: bind.to( 'clicked' )\n\t *\t\t\t\t\t}\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t * @method #bindTemplate\n\t */\n\tget bindTemplate() {\n\t\tif ( this._bindTemplate ) {\n\t\t\treturn this._bindTemplate;\n\t\t}\n\n\t\treturn ( this._bindTemplate = Template.bind( this, this ) );\n\t}\n\n\t/**\n\t * Creates a new collection of views, which can be used as\n\t * {@link module:ui/template~Template#children} of this view.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.items = this.createCollection();\n \t *\n\t *\t\t\t\tthis.template = new Template( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n\t *\t\t\t\t\t// `items` collection will render here.\n\t *\t\t\t\t\tchildren: this.items\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView( locale );\n\t *\t\tconst child = new ChildView( locale );\n\t *\n\t *\t\tview.init();\n\t *\n\t *\t\t// It will append

to the .\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t *\t\t// From now on the child is nested under its parent, which is also reflected in DOM.\n\t *\t\t//

\n\t *\t\tview.items.add( child );\n\t *\n\t * @returns {module:ui/viewcollection~ViewCollection} A new collection of view instances.\n\t */\n\tcreateCollection() {\n\t\tconst collection = new ViewCollection();\n\n\t\tthis._viewCollections.add( collection );\n\n\t\treturn collection;\n\t}\n\n\t/**\n\t * Registers a new child view under the view instance. Once registered, a child\n\t * view is managed by its parent, including {@link #init initization}\n\t * and {@link #destroy destruction}.\n\t *\n\t * To revert this, use {@link #removeChildren}.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.childA = new SomeChildView( locale );\n\t *\t\t\t\tthis.childB = new SomeChildView( locale );\n\t *\n\t *\t\t\t\tthis.template = new Template( { tag: 'p' } );\n\t *\n\t *\t\t\t\t// Register the children.\n\t *\t\t\t\tthis.addChildren( [ this.childA, this.childB ] );\n\t *\t\t\t}\n\t *\n\t *\t\t\tinit() {\n\t *\t\t\t\tthis.element.appendChild( this.childA.element );\n\t *\t\t\t\tthis.element.appendChild( this.childB.element );\n\t *\n\t *\t\t\t\treturn super.init();\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView( locale );\n\t *\n\t *\t\tview.init();\n\t *\n\t *\t\t// Will append

.\n\t *\t\tdocument.body.appendChild( view.element );\n\t *\n\t * **Note**: There's no need to add child views if they're already referenced in the\n\t * {@link #template}:\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor( locale ) {\n\t *\t\t\t\tsuper( locale );\n\t *\n\t *\t\t\t\tthis.childA = new SomeChildView( locale );\n\t *\t\t\t\tthis.childB = new SomeChildView( locale );\n\t *\n\t *\t\t\t\tthis.template = new Template( {\n\t *\t\t\t\t\ttag: 'p',\n\t *\n \t *\t\t\t\t\t// These children will be added automatically. There's no\n \t *\t\t\t\t\t// need to call {@link #addChildren} for any of them.\n\t *\t\t\t\t\tchildren: [ this.childA, this.childB ]\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\n\t *\t\t\t// ...\n\t *\t\t}\n\t *\n\t * @param {module:ui/view~View|Iterable.} children Children views to be registered.\n\t */\n\taddChildren( children ) {\n\t\tif ( !isIterable( children ) ) {\n\t\t\tchildren = [ children ];\n\t\t}\n\n\t\tchildren.map( c => this._unboundChildren.add( c ) );\n\t}\n\n\t/**\n\t * The opposite of {@link #addChildren}. Removes a child view from this view instance.\n\t * Once removed, the child is no longer managed by its parent, e.g. it can safely\n\t * become a child of another parent view.\n\t *\n\t * @see #addChildren\n\t * @param {module:ui/view~View|Iterable.} children Child views to be removed.\n\t */\n\tremoveChildren( children ) {\n\t\tif ( !isIterable( children ) ) {\n\t\t\tchildren = [ children ];\n\t\t}\n\n\t\tchildren.map( c => this._unboundChildren.remove( c ) );\n\t}\n\n\t/**\n\t * Initializes the view and its children added by {@link #addChildren} and residing in collections\n\t * created by the {@link #createCollection} method.\n\t *\n\t * In general, `init()` is the right place to keep the code which refers to the {@link #element}\n\t * and should be executed at the very beginning of the view's life cycle. It is possible to\n\t * {@link module:ui/template~Template.extend} the {@link #template} before the first reference of\n\t * the {@link #element}. To allow an early customization of the view (e.g. by its parent),\n\t * such references should be done in `init()`.\n\t *\n\t *\t\tclass SampleView extends View {\n\t *\t\t\tconstructor() {\n\t *\t\t\t\tthis.template = new Template( {\n\t *\t\t\t\t\t// ...\n\t *\t\t\t\t} );\n\t *\t\t\t},\n\t *\n\t *\t\t\tinit() {\n\t *\t\t\t\tsuper.init();\n\t *\n\t *\t\t\t\tfunction scroll() {\n\t *\t\t\t\t\t// A reference to #element would render the #template and make it non-extendable.\n\t *\t\t\t\t\tif ( window.scrollY > 0 ) {\n\t *\t\t\t\t\t\tthis.element.scrollLeft = 100;\n\t *\t\t\t\t\t} else {\n\t *\t\t\t\t\t\tthis.element.scrollLeft = 0;\n\t *\t\t\t\t\t}\n\t *\t\t\t\t}\n\t *\n\t *\t\t\t\tthis.listenTo( window, 'scroll', () => {\n\t *\t\t\t\t\tscroll();\n\t *\t\t\t\t} );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst view = new SampleView();\n\t *\n\t *\t\tTemplate.extend( view.template, {\n\t *\t\t\tattributes: {\n\t *\t\t\t\tclass: [\n\t *\t\t\t\t\t'additional-class'\n\t *\t\t\t\t]\n\t *\t\t\t}\n\t *\t\t} );\n\t *\n\t *\t\t// Late initialization allows customization of the view.\n\t *\t\tview.init();\n\t *\n\t * Once initialized, the view becomes {@link #ready}.\n\t */\n\tinit() {\n\t\tif ( this.ready ) {\n\t\t\t/**\n\t\t\t * This View has already been initialized.\n\t\t\t *\n\t\t\t * @error ui-view-init-reinit\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'ui-view-init-reinit: This View has already been initialized.' );\n\t\t}\n\n\t\t// Initialize collections in #_viewCollections.\n\t\tthis._viewCollections.map( c => c.init() );\n\n\t\t// Spread the word that this view is ready!\n\t\tthis.ready = true;\n\t}\n\n\t/**\n\t * Recursively destroys the view instance and child views added by {@link #addChildren} and\n\t * residing in collections created by the {@link #createCollection}.\n\t *\n\t * Destruction disables all event listeners:\n\t * * created on the view, e.g. `view.on( 'event', () => {} )`,\n\t * * defined in the {@link #template} for DOM events.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\n\t\tthis._viewCollections.map( c => c.destroy() );\n\t}\n\n\t/**\n\t * Recursively traverses {@link #template} in search of {@link module:ui/view~View}\n\t * instances and automatically registers them using {@link #addChildren} method.\n\t *\n\t * @protected\n\t */\n\t_addTemplateChildren() {\n\t\tconst search = def => {\n\t\t\tif ( def.children ) {\n\t\t\t\tfor ( const defOrView of def.children ) {\n\t\t\t\t\tif ( defOrView instanceof View ) {\n\t\t\t\t\t\tthis.addChildren( defOrView );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tsearch( defOrView );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\n\t\tsearch( this.template );\n\t}\n}\n\nmix( View, DomEmitterMixin );\nmix( View, ObservableMixin );\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-ui/src/view.js\n// module id = 7\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module utils/emittermixin\n */\n\nimport EventInfo from './eventinfo';\nimport uid from './uid';\nimport priorities from './priorities';\n\nconst _listeningTo = Symbol( 'listeningTo' );\nconst _emitterId = Symbol( 'emitterId' );\n\n/**\n * Mixin that injects the events API into its host.\n *\n * @mixin EmitterMixin\n * @implements module:utils/emittermixin~Emitter\n */\nconst EmitterMixin = {\n\t/**\n\t * Registers a callback function to be executed when an event is fired.\n\t *\n\t * Events can be grouped in namespaces using `:`.\n\t * When namespaced event is fired, it additionaly fires all callbacks for that namespace.\n\t *\n\t *\t\tmyEmitter.on( 'myGroup', genericCallback );\n\t *\t\tmyEmitter.on( 'myGroup:myEvent', specificCallback );\n\t *\n\t *\t\t// genericCallback is fired.\n\t *\t\tmyEmitter.fire( 'myGroup' );\n\t *\t\t// both genericCallback and specificCallback are fired.\n\t *\t\tmyEmitter.fire( 'myGroup:myEvent' );\n\t *\t\t// genericCallback is fired even though there are no callbacks for \"foo\".\n\t *\t\tmyEmitter.fire( 'myGroup:foo' );\n\t *\n\t * An event callback can {@link module:utils/eventinfo~EventInfo#stop stop the event} and\n\t * set the {@link module:utils/eventinfo~EventInfo#return return value} of the {@link #fire} method.\n\t *\n\t * @method #on\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Object} [options.context] The object that represents `this` in the callback. Defaults to the object firing the event.\n\t */\n\ton( event, callback, options = {} ) {\n\t\tcreateEventNamespace( this, event );\n\t\tconst lists = getCallbacksListsForNamespace( this, event );\n\t\tconst priority = priorities.get( options.priority );\n\n\t\tcallback = {\n\t\t\tcallback,\n\t\t\tcontext: options.context || this,\n\t\t\tpriority\n\t\t};\n\n\t\t// Add the callback to all callbacks list.\n\t\tfor ( const callbacks of lists ) {\n\t\t\t// Add the callback to the list in the right priority position.\n\t\t\tlet added = false;\n\n\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\tif ( callbacks[ i ].priority < priority ) {\n\t\t\t\t\tcallbacks.splice( i, 0, callback );\n\t\t\t\t\tadded = true;\n\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\n\t\t\t// Add at the end, if right place was not found.\n\t\t\tif ( !added ) {\n\t\t\t\tcallbacks.push( callback );\n\t\t\t}\n\t\t}\n\t},\n\n\t/**\n\t * Registers a callback function to be executed on the next time the event is fired only. This is similar to\n\t * calling {@link #on} followed by {@link #off} in the callback.\n\t *\n\t * @method #once\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Object} [options.context] The object that represents `this` in the callback. Defaults to the object firing the event.\n\t */\n\tonce( event, callback, options ) {\n\t\tconst onceCallback = function( event, ...args ) {\n\t\t\t// Go off() at the first call.\n\t\t\tevent.off();\n\n\t\t\t// Go with the original callback.\n\t\t\tcallback.call( this, event, ...args );\n\t\t};\n\n\t\t// Make a similar on() call, simply replacing the callback.\n\t\tthis.on( event, onceCallback, options );\n\t},\n\n\t/**\n\t * Stops executing the callback on the given event.\n\t *\n\t * @method #off\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to stop being called.\n\t * @param {Object} [context] The context object to be removed, pared with the given callback. To handle cases where\n\t * the same callback is used several times with different contexts.\n\t */\n\toff( event, callback, context ) {\n\t\tconst lists = getCallbacksListsForNamespace( this, event );\n\n\t\tfor ( const callbacks of lists ) {\n\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\tif ( callbacks[ i ].callback == callback ) {\n\t\t\t\t\tif ( !context || context == callbacks[ i ].context ) {\n\t\t\t\t\t\t// Remove the callback from the list (fixing the next index).\n\t\t\t\t\t\tcallbacks.splice( i, 1 );\n\t\t\t\t\t\ti--;\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t},\n\n\t/**\n\t * Registers a callback function to be executed when an event is fired in a specific (emitter) object.\n\t *\n\t * @method #listenTo\n\t * @param {module:utils/emittermixin~Emitter} emitter The object that fires the event.\n\t * @param {String} event The name of the event.\n\t * @param {Function} callback The function to be called on event.\n\t * @param {Object} [options={}] Additional options.\n\t * @param {module:utils/priorities~PriorityString|Number} [options.priority='normal'] The priority of this event callback. The higher\n\t * the priority value the sooner the callback will be fired. Events having the same priority are called in the\n\t * order they were added.\n\t * @param {Object} [options.context] The object that represents `this` in the callback. Defaults to the object firing the event.\n\t */\n\tlistenTo( emitter, event, callback, options ) {\n\t\tlet emitterInfo, eventCallbacks;\n\n\t\t// _listeningTo contains a list of emitters that this object is listening to.\n\t\t// This list has the following format:\n\t\t//\n\t\t// _listeningTo: {\n\t\t// emitterId: {\n\t\t// emitter: emitter,\n\t\t// callbacks: {\n\t\t// event1: [ callback1, callback2, ... ]\n\t\t// ....\n\t\t// }\n\t\t// },\n\t\t// ...\n\t\t// }\n\n\t\tif ( !this[ _listeningTo ] ) {\n\t\t\tthis[ _listeningTo ] = {};\n\t\t}\n\n\t\tconst emitters = this[ _listeningTo ];\n\n\t\tif ( !_getEmitterId( emitter ) ) {\n\t\t\t_setEmitterId( emitter );\n\t\t}\n\n\t\tconst emitterId = _getEmitterId( emitter );\n\n\t\tif ( !( emitterInfo = emitters[ emitterId ] ) ) {\n\t\t\temitterInfo = emitters[ emitterId ] = {\n\t\t\t\temitter,\n\t\t\t\tcallbacks: {}\n\t\t\t};\n\t\t}\n\n\t\tif ( !( eventCallbacks = emitterInfo.callbacks[ event ] ) ) {\n\t\t\teventCallbacks = emitterInfo.callbacks[ event ] = [];\n\t\t}\n\n\t\teventCallbacks.push( callback );\n\n\t\t// Finally register the callback to the event.\n\t\temitter.on( event, callback, options );\n\t},\n\n\t/**\n\t * Stops listening for events. It can be used at different levels:\n\t *\n\t * * To stop listening to a specific callback.\n\t * * To stop listening to a specific event.\n\t * * To stop listening to all events fired by a specific object.\n\t * * To stop listening to all events fired by all object.\n\t *\n\t * @method #stopListening\n\t * @param {module:utils/emittermixin~Emitter} [emitter] The object to stop listening to. If omitted, stops it for all objects.\n\t * @param {String} [event] (Requires the `emitter`) The name of the event to stop listening to. If omitted, stops it\n\t * for all events from `emitter`.\n\t * @param {Function} [callback] (Requires the `event`) The function to be removed from the call list for the given\n\t * `event`.\n\t */\n\tstopListening( emitter, event, callback ) {\n\t\tconst emitters = this[ _listeningTo ];\n\t\tlet emitterId = emitter && _getEmitterId( emitter );\n\t\tconst emitterInfo = emitters && emitterId && emitters[ emitterId ];\n\t\tconst eventCallbacks = emitterInfo && event && emitterInfo.callbacks[ event ];\n\n\t\t// Stop if nothing has been listened.\n\t\tif ( !emitters || ( emitter && !emitterInfo ) || ( event && !eventCallbacks ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\t// All params provided. off() that single callback.\n\t\tif ( callback ) {\n\t\t\temitter.off( event, callback );\n\t\t}\n\t\t// Only `emitter` and `event` provided. off() all callbacks for that event.\n\t\telse if ( eventCallbacks ) {\n\t\t\twhile ( ( callback = eventCallbacks.pop() ) ) {\n\t\t\t\temitter.off( event, callback );\n\t\t\t}\n\t\t\tdelete emitterInfo.callbacks[ event ];\n\t\t}\n\t\t// Only `emitter` provided. off() all events for that emitter.\n\t\telse if ( emitterInfo ) {\n\t\t\tfor ( event in emitterInfo.callbacks ) {\n\t\t\t\tthis.stopListening( emitter, event );\n\t\t\t}\n\t\t\tdelete emitters[ emitterId ];\n\t\t}\n\t\t// No params provided. off() all emitters.\n\t\telse {\n\t\t\tfor ( emitterId in emitters ) {\n\t\t\t\tthis.stopListening( emitters[ emitterId ].emitter );\n\t\t\t}\n\t\t\tdelete this[ _listeningTo ];\n\t\t}\n\t},\n\n\t/**\n\t * Fires an event, executing all callbacks registered for it.\n\t *\n\t * The first parameter passed to callbacks is an {@link module:utils/eventinfo~EventInfo} object,\n\t * followed by the optional `args` provided in the `fire()` method call.\n\t *\n\t * @method #fire\n\t * @param {String|module:utils/eventinfo~EventInfo} eventOrInfo The name of the event or `EventInfo` object if event is delegated.\n\t * @param {...*} [args] Additional arguments to be passed to the callbacks.\n\t * @returns {*} By default the method returns `undefined`. However, the return value can be changed by listeners\n\t * through modification of the {@link module:utils/eventinfo~EventInfo#return}'s value (the event info\n\t * is the first param of every callback).\n\t */\n\tfire( eventOrInfo, ...args ) {\n\t\tconst eventInfo = eventOrInfo instanceof EventInfo ? eventOrInfo : new EventInfo( this, eventOrInfo );\n\t\tconst event = eventInfo.name;\n\t\tlet callbacks = getCallbacksForEvent( this, event );\n\n\t\t// Record that the event passed this emitter on its path.\n\t\teventInfo.path.push( this );\n\n\t\t// Handle event listener callbacks first.\n\t\tif ( callbacks ) {\n\t\t\t// Arguments passed to each callback.\n\t\t\tconst callbackArgs = [ eventInfo, ...args ];\n\n\t\t\t// Copying callbacks array is the easiest and most secure way of preventing infinite loops, when event callbacks\n\t\t\t// are added while processing other callbacks. Previous solution involved adding counters (unique ids) but\n\t\t\t// failed if callbacks were added to the queue before currently processed callback.\n\t\t\t// If this proves to be too inefficient, another method is to change `.on()` so callbacks are stored if same\n\t\t\t// event is currently processed. Then, `.fire()` at the end, would have to add all stored events.\n\t\t\tcallbacks = Array.from( callbacks );\n\n\t\t\tfor ( let i = 0; i < callbacks.length; i++ ) {\n\t\t\t\tcallbacks[ i ].callback.apply( callbacks[ i ].context, callbackArgs );\n\n\t\t\t\t// Remove the callback from future requests if off() has been called.\n\t\t\t\tif ( eventInfo.off.called ) {\n\t\t\t\t\t// Remove the called mark for the next calls.\n\t\t\t\t\tdelete eventInfo.off.called;\n\n\t\t\t\t\tthis.off( event, callbacks[ i ].callback, callbacks[ i ].context );\n\t\t\t\t}\n\n\t\t\t\t// Do not execute next callbacks if stop() was called.\n\t\t\t\tif ( eventInfo.stop.called ) {\n\t\t\t\t\tbreak;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\t// Delegate event to other emitters if needed.\n\t\tif ( this._delegations ) {\n\t\t\tconst destinations = this._delegations.get( event );\n\t\t\tconst passAllDestinations = this._delegations.get( '*' );\n\n\t\t\tif ( destinations ) {\n\t\t\t\tfireDelegatedEvents( destinations, eventInfo, args );\n\t\t\t}\n\n\t\t\tif ( passAllDestinations ) {\n\t\t\t\tfireDelegatedEvents( passAllDestinations, eventInfo, args );\n\t\t\t}\n\t\t}\n\n\t\treturn eventInfo.return;\n\t},\n\n\t/**\n\t * Delegates selected events to another {@link module:utils/emittermixin~Emitter}. For instance:\n\t *\n\t *\t\temitterA.delegate( 'eventX' ).to( emitterB );\n\t *\t\temitterA.delegate( 'eventX', 'eventY' ).to( emitterC );\n\t *\n\t * then `eventX` is delegated (fired by) `emitterB` and `emitterC` along with `data`:\n\t *\n\t *\t\temitterA.fire( 'eventX', data );\n\t *\n\t * and `eventY` is delegated (fired by) `emitterC` along with `data`:\n\t *\n\t *\t\temitterA.fire( 'eventY', data );\n\t *\n\t * @method #delegate\n\t * @param {...String} events Event names that will be delegated to another emitter.\n\t * @returns {module:utils/emittermixin~EmitterMixinDelegateChain}\n\t */\n\tdelegate( ...events ) {\n\t\treturn {\n\t\t\tto: ( emitter, nameOrFunction ) => {\n\t\t\t\tif ( !this._delegations ) {\n\t\t\t\t\tthis._delegations = new Map();\n\t\t\t\t}\n\n\t\t\t\tfor ( const eventName of events ) {\n\t\t\t\t\tconst destinations = this._delegations.get( eventName );\n\n\t\t\t\t\tif ( !destinations ) {\n\t\t\t\t\t\tthis._delegations.set( eventName, new Map( [ [ emitter, nameOrFunction ] ] ) );\n\t\t\t\t\t} else {\n\t\t\t\t\t\tdestinations.set( emitter, nameOrFunction );\n\t\t\t\t\t}\n\t\t\t\t}\n\t\t\t}\n\t\t};\n\t},\n\n\t/**\n\t * Stops delegating events. It can be used at different levels:\n\t *\n\t * * To stop delegating all events.\n\t * * To stop delegating a specific event to all emitters.\n\t * * To stop delegating a specific event to a specific emitter.\n\t *\n\t * @method #stopDelegating\n\t * @param {String} [event] The name of the event to stop delegating. If omitted, stops it all delegations.\n\t * @param {module:utils/emittermixin~Emitter} [emitter] (requires `event`) The object to stop delegating a particular event to.\n\t * If omitted, stops delegation of `event` to all emitters.\n\t */\n\tstopDelegating( event, emitter ) {\n\t\tif ( !this._delegations ) {\n\t\t\treturn;\n\t\t}\n\n\t\tif ( !event ) {\n\t\t\tthis._delegations.clear();\n\t\t} else if ( !emitter ) {\n\t\t\tthis._delegations.delete( event );\n\t\t} else {\n\t\t\tconst destinations = this._delegations.get( event );\n\n\t\t\tif ( destinations ) {\n\t\t\t\tdestinations.delete( emitter );\n\t\t\t}\n\t\t}\n\t}\n};\n\nexport default EmitterMixin;\n\n/**\n * Checks if `listeningEmitter` listens to an emitter with given `listenedToEmitterId` and if so, returns that emitter.\n * If not, returns `null`.\n *\n * @protected\n * @param {module:utils/emittermixin~EmitterMixin} listeningEmitter Emitter that listens.\n * @param {String} listenedToEmitterId Unique emitter id of emitter listened to.\n * @returns {module:utils/emittermixin~EmitterMixin|null}\n */\nexport function _getEmitterListenedTo( listeningEmitter, listenedToEmitterId ) {\n\tif ( listeningEmitter[ _listeningTo ] && listeningEmitter[ _listeningTo ][ listenedToEmitterId ] ) {\n\t\treturn listeningEmitter[ _listeningTo ][ listenedToEmitterId ].emitter;\n\t}\n\n\treturn null;\n}\n\n/**\n * Sets emitter's unique id.\n *\n * **Note:** `_emitterId` can be set only once.\n *\n * @protected\n * @param {module:utils/emittermixin~EmitterMixin} emitter Emitter for which id will be set.\n * @param {String} [id] Unique id to set. If not passed, random unique id will be set.\n */\nexport function _setEmitterId( emitter, id ) {\n\tif ( !emitter[ _emitterId ] ) {\n\t\temitter[ _emitterId ] = id || uid();\n\t}\n}\n\n/**\n * Returns emitter's unique id.\n *\n * @protected\n * @param {module:utils/emittermixin~EmitterMixin} emitter Emitter which id will be returned.\n */\nexport function _getEmitterId( emitter ) {\n\treturn emitter[ _emitterId ];\n}\n\n// Gets the internal `_events` property of the given object.\n// `_events` property store all lists with callbacks for registered event names.\n// If there were no events registered on the object, empty `_events` object is created.\nfunction getEvents( source ) {\n\tif ( !source._events ) {\n\t\tObject.defineProperty( source, '_events', {\n\t\t\tvalue: {}\n\t\t} );\n\t}\n\n\treturn source._events;\n}\n\n// Creates event node for generic-specific events relation architecture.\nfunction makeEventNode() {\n\treturn {\n\t\tcallbacks: [],\n\t\tchildEvents: []\n\t};\n}\n\n// Creates an architecture for generic-specific events relation.\n// If needed, creates all events for given eventName, i.e. if the first registered event\n// is foo:bar:abc, it will create foo:bar:abc, foo:bar and foo event and tie them together.\n// It also copies callbacks from more generic events to more specific events when\n// specific events are created.\nfunction createEventNamespace( source, eventName ) {\n\tconst events = getEvents( source );\n\n\t// First, check if the event we want to add to the structure already exists.\n\tif ( events[ eventName ] ) {\n\t\t// If it exists, we don't have to do anything.\n\t\treturn;\n\t}\n\n\t// In other case, we have to create the structure for the event.\n\t// Note, that we might need to create intermediate events too.\n\t// I.e. if foo:bar:abc is being registered and we only have foo in the structure,\n\t// we need to also register foo:bar.\n\n\t// Currently processed event name.\n\tlet name = eventName;\n\t// Name of the event that is a child event for currently processed event.\n\tlet childEventName = null;\n\n\t// Array containing all newly created specific events.\n\tconst newEventNodes = [];\n\n\t// While loop can't check for ':' index because we have to handle generic events too.\n\t// In each loop, we truncate event name, going from the most specific name to the generic one.\n\t// I.e. foo:bar:abc -> foo:bar -> foo.\n\twhile ( name !== '' ) {\n\t\tif ( events[ name ] ) {\n\t\t\t// If the currently processed event name is already registered, we can be sure\n\t\t\t// that it already has all the structure created, so we can break the loop here\n\t\t\t// as no more events need to be registered.\n\t\t\tbreak;\n\t\t}\n\n\t\t// If this event is not yet registered, create a new object for it.\n\t\tevents[ name ] = makeEventNode();\n\t\t// Add it to the array with newly created events.\n\t\tnewEventNodes.push( events[ name ] );\n\n\t\t// Add previously processed event name as a child of this event.\n\t\tif ( childEventName ) {\n\t\t\tevents[ name ].childEvents.push( childEventName );\n\t\t}\n\n\t\tchildEventName = name;\n\t\t// If `.lastIndexOf()` returns -1, `.substr()` will return '' which will break the loop.\n\t\tname = name.substr( 0, name.lastIndexOf( ':' ) );\n\t}\n\n\tif ( name !== '' ) {\n\t\t// If name is not empty, we found an already registered event that was a parent of the\n\t\t// event we wanted to register.\n\n\t\t// Copy that event's callbacks to newly registered events.\n\t\tfor ( const node of newEventNodes ) {\n\t\t\tnode.callbacks = events[ name ].callbacks.slice();\n\t\t}\n\n\t\t// Add last newly created event to the already registered event.\n\t\tevents[ name ].childEvents.push( childEventName );\n\t}\n}\n\n// Gets an array containing callbacks list for a given event and it's more specific events.\n// I.e. if given event is foo:bar and there is also foo:bar:abc event registered, this will\n// return callback list of foo:bar and foo:bar:abc (but not foo).\n// Returns empty array if given event has not been yet registered.\nfunction getCallbacksListsForNamespace( source, eventName ) {\n\tconst eventNode = getEvents( source )[ eventName ];\n\n\tif ( !eventNode ) {\n\t\treturn [];\n\t}\n\n\tlet callbacksLists = [ eventNode.callbacks ];\n\n\tfor ( let i = 0; i < eventNode.childEvents.length; i++ ) {\n\t\tconst childCallbacksLists = getCallbacksListsForNamespace( source, eventNode.childEvents[ i ] );\n\n\t\tcallbacksLists = callbacksLists.concat( childCallbacksLists );\n\t}\n\n\treturn callbacksLists;\n}\n\n// Get the list of callbacks for a given event, but only if there any callbacks have been registered.\n// If there are no callbacks registered for given event, it checks if this is a specific event and looks\n// for callbacks for it's more generic version.\nfunction getCallbacksForEvent( source, eventName ) {\n\tlet event;\n\n\tif ( !source._events || !( event = source._events[ eventName ] ) || !event.callbacks.length ) {\n\t\t// There are no callbacks registered for specified eventName.\n\t\t// But this could be a specific-type event that is in a namespace.\n\t\tif ( eventName.indexOf( ':' ) > -1 ) {\n\t\t\t// If the eventName is specific, try to find callback lists for more generic event.\n\t\t\treturn getCallbacksForEvent( source, eventName.substr( 0, eventName.lastIndexOf( ':' ) ) );\n\t\t} else {\n\t\t\t// If this is a top-level generic event, return null;\n\t\t\treturn null;\n\t\t}\n\t}\n\n\treturn event.callbacks;\n}\n\n// Fires delegated events for given map of destinations.\n//\n// @private\n// * @param {Map.} destinations A map containing `[ {@link utils.Emitter}, \"event name\" ]` pair destinations.\n// * @param {utils.EventInfo} eventInfo The original event info object.\n// * @param {Array.<*>} fireArgs Arguments the original event was fired with.\nfunction fireDelegatedEvents( destinations, eventInfo, fireArgs ) {\n\tfor ( let [ emitter, name ] of destinations ) {\n\t\tif ( !name ) {\n\t\t\tname = eventInfo.name;\n\t\t} else if ( typeof name == 'function' ) {\n\t\t\tname = name( eventInfo.name );\n\t\t}\n\n\t\tconst delegatedInfo = new EventInfo( eventInfo.source, name );\n\n\t\tdelegatedInfo.path = [ ...eventInfo.path ];\n\n\t\temitter.fire( delegatedInfo, ...fireArgs );\n\t}\n}\n\n/**\n * Interface representing classes which mix in {@link module:utils/emittermixin~EmitterMixin}.\n *\n * @interface Emitter\n */\n\n/**\n * The return value of {@link ~EmitterMixin#delegate}.\n *\n * @interface module:utils/emittermixin~EmitterMixinDelegateChain\n */\n\n/**\n * Selects destination for {@link module:utils/emittermixin~EmitterMixin#delegate} events.\n *\n * @method #to\n * @param {module:utils/emittermixin~Emitter} emitter An `EmitterMixin` instance which is the destination for delegated events.\n * @param {String|Function} nameOrFunction A custom event name or function which converts the original name string.\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/emittermixin.js\n// module id = 8\n// module chunks = 0","import baseMatches from './_baseMatches';\nimport baseMatchesProperty from './_baseMatchesProperty';\nimport identity from './identity';\nimport isArray from './isArray';\nimport property from './property';\n\n/**\n * The base implementation of `_.iteratee`.\n *\n * @private\n * @param {*} [value=_.identity] The value to convert to an iteratee.\n * @returns {Function} Returns the iteratee.\n */\nfunction baseIteratee(value) {\n // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.\n // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.\n if (typeof value == 'function') {\n return value;\n }\n if (value == null) {\n return identity;\n }\n if (typeof value == 'object') {\n return isArray(value)\n ? baseMatchesProperty(value[0], value[1])\n : baseMatches(value);\n }\n return property(value);\n}\n\nexport default baseIteratee;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/_baseIteratee.js\n// module id = 10\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module core/command\n */\n\nimport ObservableMixin from '@ckeditor/ckeditor5-utils/src/observablemixin';\nimport mix from '@ckeditor/ckeditor5-utils/src/mix';\n\n/**\n * The base class for CKEditor commands.\n *\n * Commands are the main way to manipulate editor contents and state. They are mostly used by UI elements (or by other\n * commands) to make changes in the model. Commands are available in every part of code that has access to\n * the {@link module:core/editor/editor~Editor editor} instance.\n *\n * Instances of registered commands can be retrieved from {@link module:core/editor/editor~Editor#commands}.\n * The easiest way to execute a command is through {@link module:core/editor/editor~Editor#execute}.\n *\n * By default commands are disabled when the editor is in {@link module:core/editor/editor~Editor#isReadOnly read-only} mode.\n *\n * @mixes module:utils/observablemixin~ObservableMixin\n */\nexport default class Command {\n\t/**\n\t * Creates a new `Command` instance.\n\t *\n\t * @param {module:core/editor/editor~Editor} editor Editor on which this command will be used.\n\t */\n\tconstructor( editor ) {\n\t\t/**\n\t\t * The editor on which this command will be used.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:core/editor/editor~Editor}\n\t\t */\n\t\tthis.editor = editor;\n\n\t\t/**\n\t\t * The value of a command. Concrete command class should define what it represents.\n\t\t *\n\t\t * For example, the `bold` command's value is whether the selection starts in a bolded text.\n\t\t * And the value of the `link` command may be an object with links details.\n\t\t *\n\t\t * It's possible for a command to have no value (e.g. for stateless actions such as `uploadImage`).\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member #value\n\t\t */\n\t\tthis.set( 'value', undefined );\n\n\t\t/**\n\t\t * Flag indicating whether a command is enabled or disabled.\n\t\t * A disabled command should do nothing when executed.\n\t\t *\n\t\t * @observable\n\t\t * @readonly\n\t\t * @member {Boolean} #isEnabled\n\t\t */\n\t\tthis.set( 'isEnabled', false );\n\n\t\tthis.decorate( 'execute' );\n\n\t\t// By default every command is refreshed when changes are applied to the model.\n\t\tthis.listenTo( this.editor.document, 'changesDone', () => {\n\t\t\tthis.refresh();\n\t\t} );\n\n\t\tthis.on( 'execute', evt => {\n\t\t\tif ( !this.isEnabled ) {\n\t\t\t\tevt.stop();\n\t\t\t}\n\t\t}, { priority: 'high' } );\n\n\t\t// By default commands are disabled when the editor is in read-only mode.\n\t\tthis.listenTo( editor, 'change:isReadOnly', ( evt, name, value ) => {\n\t\t\tif ( value ) {\n\t\t\t\t// See a ticket about overriding observable properties\n\t\t\t\t// https://github.com/ckeditor/ckeditor5-utils/issues/171.\n\t\t\t\tthis.on( 'change:isEnabled', forceDisable, { priority: 'lowest' } );\n\t\t\t\tthis.isEnabled = false;\n\t\t\t} else {\n\t\t\t\tthis.off( 'change:isEnabled', forceDisable );\n\t\t\t\tthis.refresh();\n\t\t\t}\n\t\t} );\n\n\t\tfunction forceDisable() {\n\t\t\tthis.isEnabled = false;\n\t\t}\n\t}\n\n\t/**\n\t * Refreshes the command. The command should update its {@link #isEnabled} and {@link #value} property\n\t * in this method.\n\t *\n\t * This method is automatically called when\n\t * {@link module:engine/model/document~Document#event:changesDone any changes are applied to the model}.\n\t */\n\trefresh() {\n\t\tthis.isEnabled = true;\n\t}\n\n\t/**\n\t * Executes the command.\n\t *\n\t * A command may accept parameters. They will be passed from {@link module:core/editor/editor~Editor#execute}\n\t * to the command.\n\t *\n\t * The `execute()` method will automatically abort when the command is disabled ({@link #isEnabled} is `false`).\n\t * This behavior is implemented by a high priority listener to the {@link #event:execute} event.\n\t *\n\t * @fires execute\n\t */\n\texecute() {}\n\n\t/**\n\t * Destroys the command.\n\t */\n\tdestroy() {\n\t\tthis.stopListening();\n\t}\n\n\t/**\n\t * Event fired by the {@link #execute} method. The command action is a listener to this event so it's\n\t * possible to change/cancel the behavior of the command by listening to this event.\n\t *\n\t * See {@link module:utils/observablemixin~ObservableMixin.decorate} for more information and samples.\n\t *\n\t * **Note:** This event is fired even if command is disabled. However, it is automatically blocked\n\t * by a high priority listener in order to prevent command execution.\n\t *\n\t * @event execute\n\t */\n}\n\nmix( Command, ObservableMixin );\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-core/src/command.js\n// module id = 11\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module utils/observablemixin\n */\n\nimport EmitterMixin from './emittermixin';\nimport CKEditorError from './ckeditorerror';\nimport extend from './lib/lodash/extend';\nimport isObject from './lib/lodash/isObject';\n\nconst attributesSymbol = Symbol( 'attributes' );\nconst boundObservablesSymbol = Symbol( 'boundObservables' );\nconst boundAttributesSymbol = Symbol( 'boundAttributes' );\n\n/**\n * Mixin that injects the \"observable attributes\" and data binding functionality.\n * Used mainly in the {@link module:ui/model~Model} class.\n *\n * @mixin ObservableMixin\n * @mixes module:utils/emittermixin~EmitterMixin\n * @implements module:utils/observablemixin~Observable\n */\nconst ObservableMixin = {\n\t/**\n\t * Creates and sets the value of an observable attribute of this object. Such an attribute becomes a part\n\t * of the state and is be observable.\n\t *\n\t * It accepts also a single object literal containing key/value pairs with attributes to be set.\n\t *\n\t * This method throws the observable-set-cannot-override error if the observable instance already\n\t * have a property with a given attribute name. This prevents from mistakenly overriding existing\n\t * properties and methods, but means that `foo.set( 'bar', 1 )` may be slightly slower than `foo.bar = 1`.\n\t *\n\t * @method #set\n\t * @param {String} name The attributes name.\n\t * @param {*} value The attributes value.\n\t */\n\tset( name, value ) {\n\t\t// If the first parameter is an Object, iterate over its properties.\n\t\tif ( isObject( name ) ) {\n\t\t\tObject.keys( name ).forEach( attr => {\n\t\t\t\tthis.set( attr, name[ attr ] );\n\t\t\t}, this );\n\n\t\t\treturn;\n\t\t}\n\n\t\tinitObservable( this );\n\n\t\tconst attributes = this[ attributesSymbol ];\n\n\t\tif ( ( name in this ) && !attributes.has( name ) ) {\n\t\t\t/**\n\t\t\t * Cannot override an existing property.\n\t\t\t *\n\t\t\t * This error is thrown when trying to {@link ~Observable#set set} an attribute with\n\t\t\t * a name of an already existing property. For example:\n\t\t\t *\n\t\t\t *\t\tlet observable = new Model();\n\t\t\t *\t\tobservable.property = 1;\n\t\t\t *\t\tobservable.set( 'property', 2 );\t\t// throws\n\t\t\t *\n\t\t\t *\t\tobservable.set( 'attr', 1 );\n\t\t\t *\t\tobservable.set( 'attr', 2 );\t\t\t// ok, because this is an existing attribute.\n\t\t\t *\n\t\t\t * @error observable-set-cannot-override\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-set-cannot-override: Cannot override an existing property.' );\n\t\t}\n\n\t\tObject.defineProperty( this, name, {\n\t\t\tenumerable: true,\n\t\t\tconfigurable: true,\n\n\t\t\tget() {\n\t\t\t\treturn attributes.get( name );\n\t\t\t},\n\n\t\t\tset( value ) {\n\t\t\t\tconst oldValue = attributes.get( name );\n\n\t\t\t\t// Allow undefined as an initial value like A.define( 'x', undefined ) (#132).\n\t\t\t\t// Note: When attributes map has no such own property, then its value is undefined.\n\t\t\t\tif ( oldValue !== value || !attributes.has( name ) ) {\n\t\t\t\t\tattributes.set( name, value );\n\t\t\t\t\tthis.fire( 'change:' + name, name, value, oldValue );\n\t\t\t\t}\n\t\t\t}\n\t\t} );\n\n\t\tthis[ name ] = value;\n\t},\n\n\t/**\n\t * Binds observable attributes to another objects implementing {@link ~ObservableMixin}\n\t * interface (like {@link module:ui/model~Model}).\n\t *\n\t * Once bound, the observable will immediately share the current state of attributes\n\t * of the observable it is bound to and react to the changes to these attributes\n\t * in the future.\n\t *\n\t * **Note**: To release the binding use {@link module:utils/observablemixin~ObservableMixin#unbind}.\n\t *\n\t *\t\tA.bind( 'a' ).to( B );\n\t *\t\tA.bind( 'a' ).to( B, 'b' );\n\t *\t\tA.bind( 'a', 'b' ).to( B, 'c', 'd' );\n\t *\t\tA.bind( 'a' ).to( B, 'b', C, 'd', ( b, d ) => b + d );\n\t *\n\t * @method #bind\n\t * @param {...String} bindAttrs Observable attributes that will be bound to another observable(s).\n\t * @returns {module:utils/observablemixin~BindChain}\n\t */\n\tbind( ...bindAttrs ) {\n\t\tif ( !bindAttrs.length || !isStringArray( bindAttrs ) ) {\n\t\t\t/**\n\t\t\t * All attributes must be strings.\n\t\t\t *\n\t\t\t * @error observable-bind-wrong-attrs\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-wrong-attrs: All attributes must be strings.' );\n\t\t}\n\n\t\tif ( ( new Set( bindAttrs ) ).size !== bindAttrs.length ) {\n\t\t\t/**\n\t\t\t * Attributes must be unique.\n\t\t\t *\n\t\t\t * @error observable-bind-duplicate-attrs\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-duplicate-attrs: Attributes must be unique.' );\n\t\t}\n\n\t\tinitObservable( this );\n\n\t\tconst boundAttributes = this[ boundAttributesSymbol ];\n\n\t\tbindAttrs.forEach( attrName => {\n\t\t\tif ( boundAttributes.has( attrName ) ) {\n\t\t\t\t/**\n\t\t\t\t * Cannot bind the same attribute more that once.\n\t\t\t\t *\n\t\t\t\t * @error observable-bind-rebind\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'observable-bind-rebind: Cannot bind the same attribute more that once.' );\n\t\t\t}\n\t\t} );\n\n\t\tconst bindings = new Map();\n\n\t\t/**\n\t\t * @typedef Binding\n\t\t * @type Object\n\t\t * @property {Array} attr Attribute which is bound.\n\t\t * @property {Array} to Array of observable–attribute components of the binding (`{ observable: ..., attr: .. }`).\n\t\t * @property {Array} callback A function which processes `to` components.\n\t\t */\n\t\tbindAttrs.forEach( a => {\n\t\t\tconst binding = { attr: a, to: [] };\n\n\t\t\tboundAttributes.set( a, binding );\n\t\t\tbindings.set( a, binding );\n\t\t} );\n\n\t\t/**\n\t\t * @typedef BindChain\n\t\t * @type Object\n\t\t * @property {Function} to See {@link ~ObservableMixin#_bindTo}.\n\t\t * @property {module:utils/observablemixin~Observable} _observable The observable which initializes the binding.\n\t\t * @property {Array} _bindAttrs Array of `_observable` attributes to be bound.\n\t\t * @property {Array} _to Array of `to()` observable–attributes (`{ observable: toObservable, attrs: ...toAttrs }`).\n\t\t * @property {Map} _bindings Stores bindings to be kept in\n\t\t * {@link ~ObservableMixin#_boundAttributes}/{@link ~ObservableMixin#_boundObservables}\n\t\t * initiated in this binding chain.\n\t\t */\n\t\treturn {\n\t\t\tto: bindTo,\n\n\t\t\t_observable: this,\n\t\t\t_bindAttrs: bindAttrs,\n\t\t\t_to: [],\n\t\t\t_bindings: bindings\n\t\t};\n\t},\n\n\t/**\n\t * Removes the binding created with {@link ~ObservableMixin#bind}.\n\t *\n\t *\t\tA.unbind( 'a' );\n\t *\t\tA.unbind();\n\t *\n\t * @method #unbind\n\t * @param {...String} [unbindAttrs] Observable attributes to be unbound. All the bindings will\n\t * be released if no attributes provided.\n\t */\n\tunbind( ...unbindAttrs ) {\n\t\t// Nothing to do here if not inited yet.\n\t\tif ( !( attributesSymbol in this ) ) {\n\t\t\treturn;\n\t\t}\n\n\t\tconst boundAttributes = this[ boundAttributesSymbol ];\n\t\tconst boundObservables = this[ boundObservablesSymbol ];\n\n\t\tif ( unbindAttrs.length ) {\n\t\t\tif ( !isStringArray( unbindAttrs ) ) {\n\t\t\t\t/**\n\t\t\t\t * Attributes must be strings.\n\t\t\t\t *\n\t\t\t\t * @error observable-unbind-wrong-attrs\n\t\t\t\t */\n\t\t\t\tthrow new CKEditorError( 'observable-unbind-wrong-attrs: Attributes must be strings.' );\n\t\t\t}\n\n\t\t\tunbindAttrs.forEach( attrName => {\n\t\t\t\tconst binding = boundAttributes.get( attrName );\n\t\t\t\tlet toObservable, toAttr, toAttrs, toAttrBindings;\n\n\t\t\t\tbinding.to.forEach( to => {\n\t\t\t\t\t// TODO: ES6 destructuring.\n\t\t\t\t\ttoObservable = to[ 0 ];\n\t\t\t\t\ttoAttr = to[ 1 ];\n\t\t\t\t\ttoAttrs = boundObservables.get( toObservable );\n\t\t\t\t\ttoAttrBindings = toAttrs[ toAttr ];\n\n\t\t\t\t\ttoAttrBindings.delete( binding );\n\n\t\t\t\t\tif ( !toAttrBindings.size ) {\n\t\t\t\t\t\tdelete toAttrs[ toAttr ];\n\t\t\t\t\t}\n\n\t\t\t\t\tif ( !Object.keys( toAttrs ).length ) {\n\t\t\t\t\t\tboundObservables.delete( toObservable );\n\t\t\t\t\t\tthis.stopListening( toObservable, 'change' );\n\t\t\t\t\t}\n\t\t\t\t} );\n\n\t\t\t\tboundAttributes.delete( attrName );\n\t\t\t} );\n\t\t} else {\n\t\t\tboundObservables.forEach( ( bindings, boundObservable ) => {\n\t\t\t\tthis.stopListening( boundObservable, 'change' );\n\t\t\t} );\n\n\t\t\tboundObservables.clear();\n\t\t\tboundAttributes.clear();\n\t\t}\n\t},\n\n\t/**\n\t * Turns the given methods of this object into event-based ones. This means that the new method will fire an event\n\t * (named after the method) and the original action will be plugged as a listener to that event.\n\t *\n\t * This is a very simplified method decoration. Itself it doesn't change the behavior of a method (expect adding the event),\n\t * but it allows to modify it later on by listening to the method's event.\n\t *\n\t * For example, in order to cancel the method execution one can stop the event:\n\t *\n\t *\t\tclass Foo {\n\t *\t\t\tconstructor() {\n\t *\t\t\t\tthis.decorate( 'method' );\n\t *\t\t\t}\n\t *\n\t *\t\t\tmethod() {\n\t *\t\t\t\tconsole.log( 'called!' );\n\t *\t\t\t}\n\t *\t\t}\n\t *\n\t *\t\tconst foo = new Foo();\n\t *\t\tfoo.on( 'method', ( evt ) => {\n\t *\t\t\tevt.stop();\n\t *\t\t}, { priority: 'high' } );\n\t *\n\t *\t\tfoo.method(); // Nothing is logged.\n\t *\n\t *\n\t * Note: we used a high priority listener here to execute this callback before the one which\n\t * calls the orignal method (which used the default priority).\n\t *\n\t * It's also possible to change the return value:\n\t *\n\t *\t\tfoo.on( 'method', ( evt ) => {\n\t *\t\t\tevt.return = 'Foo!';\n\t *\t\t} );\n\t *\n\t *\t\tfoo.method(); // -> 'Foo'\n\t *\n\t * Finally, it's possible to access and modify the parameters:\n\t *\n\t *\t\tmethod( a, b ) {\n\t *\t\t\tconsole.log( `${ a }, ${ b }` );\n\t *\t\t}\n\t *\n\t *\t\t// ...\n\t *\n\t *\t\tfoo.on( 'method', ( evt, args ) => {\n\t *\t\t\targs[ 0 ] = 3;\n\t *\n\t *\t\t\tconsole.log( args[ 1 ] ); // -> 2\n\t *\t\t}, { priority: 'high' } );\n\t *\n\t *\t\tfoo.method( 1, 2 ); // -> '3, 2'\n\t *\n\t * @method #decorate\n\t * @param {String} methodName Name of the method to decorate.\n\t */\n\tdecorate( methodName ) {\n\t\tconst originalMethod = this[ methodName ];\n\n\t\tif ( !originalMethod ) {\n\t\t\t/**\n\t\t\t * Cannot decorate an undefined method.\n\t\t\t *\n\t\t\t * @error observablemixin-cannot-decorate-undefined\n\t\t\t * @param {Object} object The object which method should be decorated.\n\t\t\t * @param {String} methodName Name of the method which does not exist.\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'observablemixin-cannot-decorate-undefined: Cannot decorate an undefined method.',\n\t\t\t\t{ object: this, methodName }\n\t\t\t);\n\t\t}\n\n\t\tthis.on( methodName, ( evt, args ) => {\n\t\t\tevt.return = originalMethod.apply( this, args );\n\t\t} );\n\n\t\tthis[ methodName ] = function( ...args ) {\n\t\t\treturn this.fire( methodName, args );\n\t\t};\n\t}\n\n\t/**\n\t * @private\n\t * @member ~ObservableMixin#_boundAttributes\n\t */\n\n\t/**\n\t * @private\n\t * @member ~ObservableMixin#_boundObservables\n\t */\n\n\t/**\n\t * @private\n\t * @member ~ObservableMixin#_bindTo\n\t */\n};\n\nexport default ObservableMixin;\n\n// Init symbol properties needed to for the observable mechanism to work.\n//\n// @private\n// @param {module:utils/observablemixin~ObservableMixin} observable\nfunction initObservable( observable ) {\n\t// Do nothing if already inited.\n\tif ( attributesSymbol in observable ) {\n\t\treturn;\n\t}\n\n\t// The internal hash containing the observable's state.\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, attributesSymbol, {\n\t\tvalue: new Map()\n\t} );\n\n\t// Map containing bindings to external observables. It shares the binding objects\n\t// (`{ observable: A, attr: 'a', to: ... }`) with {@link module:utils/observablemixin~ObservableMixin#_boundAttributes} and\n\t// it is used to observe external observables to update own attributes accordingly.\n\t// See {@link module:utils/observablemixin~ObservableMixin#bind}.\n\t//\n\t//\t\tA.bind( 'a', 'b', 'c' ).to( B, 'x', 'y', 'x' );\n\t//\t\tconsole.log( A._boundObservables );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\tB: {\n\t//\t\t\t\t\tx: Set( [\n\t//\t\t\t\t\t\t{ observable: A, attr: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\t\t\t{ observable: A, attr: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\ty: Set( [\n\t//\t\t\t\t\t\t{ observable: A, attr: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t}\n\t//\t\t\t} )\n\t//\n\t//\t\tA.bind( 'd' ).to( B, 'z' ).to( C, 'w' ).as( callback );\n\t//\t\tconsole.log( A._boundObservables );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\tB: {\n\t//\t\t\t\t\tx: Set( [\n\t//\t\t\t\t\t\t{ observable: A, attr: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\t\t\t{ observable: A, attr: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\ty: Set( [\n\t//\t\t\t\t\t\t{ observable: A, attr: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\t\t] ),\n\t//\t\t\t\t\tz: Set( [\n\t//\t\t\t\t\t\t{ observable: A, attr: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t},\n\t//\t\t\t\tC: {\n\t//\t\t\t\t\tw: Set( [\n\t//\t\t\t\t\t\t{ observable: A, attr: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t\t\t] )\n\t//\t\t\t\t}\n\t//\t\t\t} )\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, boundObservablesSymbol, {\n\t\tvalue: new Map()\n\t} );\n\n\t// Object that stores which attributes of this observable are bound and how. It shares\n\t// the binding objects (`{ observable: A, attr: 'a', to: ... }`) with {@link utils.ObservableMixin#_boundObservables}.\n\t// This data structure is a reverse of {@link utils.ObservableMixin#_boundObservables} and it is helpful for\n\t// {@link utils.ObservableMixin#unbind}.\n\t//\n\t// See {@link utils.ObservableMixin#bind}.\n\t//\n\t//\t\tA.bind( 'a', 'b', 'c' ).to( B, 'x', 'y', 'x' );\n\t//\t\tconsole.log( A._boundAttributes );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\ta: { observable: A, attr: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\tb: { observable: A, attr: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\tc: { observable: A, attr: 'c', to: [ [ B, 'x' ] ] }\n\t//\t\t\t} )\n\t//\n\t//\t\tA.bind( 'd' ).to( B, 'z' ).to( C, 'w' ).as( callback );\n\t//\t\tconsole.log( A._boundAttributes );\n\t//\n\t//\t\t\tMap( {\n\t//\t\t\t\ta: { observable: A, attr: 'a', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\tb: { observable: A, attr: 'b', to: [ [ B, 'y' ] ] },\n\t//\t\t\t\tc: { observable: A, attr: 'c', to: [ [ B, 'x' ] ] },\n\t//\t\t\t\td: { observable: A, attr: 'd', to: [ [ B, 'z' ], [ C, 'w' ] ], callback: callback }\n\t//\t\t\t} )\n\t//\n\t// @private\n\t// @type {Map}\n\tObject.defineProperty( observable, boundAttributesSymbol, {\n\t\tvalue: new Map()\n\t} );\n}\n\n// A chaining for {@link module:utils/observablemixin~ObservableMixin#bind} providing `.to()` interface.\n//\n// @private\n// @param {...[Observable|String|Function]} args Arguments of the `.to( args )` binding.\nfunction bindTo( ...args ) {\n\tconst parsedArgs = parseBindToArgs( ...args );\n\tconst bindingsKeys = Array.from( this._bindings.keys() );\n\tconst numberOfBindings = bindingsKeys.length;\n\n\t// Eliminate A.bind( 'x' ).to( B, C )\n\tif ( !parsedArgs.callback && parsedArgs.to.length > 1 ) {\n\t\t/**\n\t\t * Binding multiple observables only possible with callback.\n\t\t *\n\t\t * @error observable-bind-no-callback\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-no-callback: Binding multiple observables only possible with callback.' );\n\t}\n\n\t// Eliminate A.bind( 'x', 'y' ).to( B, callback )\n\tif ( numberOfBindings > 1 && parsedArgs.callback ) {\n\t\t/**\n\t\t * Cannot bind multiple attributes and use a callback in one binding.\n\t\t *\n\t\t * @error observable-bind-to-extra-callback\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-extra-callback: Cannot bind multiple attributes and use a callback in one binding.' );\n\t}\n\n\tparsedArgs.to.forEach( to => {\n\t\t// Eliminate A.bind( 'x', 'y' ).to( B, 'a' )\n\t\tif ( to.attrs.length && to.attrs.length !== numberOfBindings ) {\n\t\t\t/**\n\t\t\t * The number of attributes must match.\n\t\t\t *\n\t\t\t * @error observable-bind-to-attrs-length\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'observable-bind-to-attrs-length: The number of attributes must match.' );\n\t\t}\n\n\t\t// When no to.attrs specified, observing source attributes instead i.e.\n\t\t// A.bind( 'x', 'y' ).to( B ) -> Observe B.x and B.y\n\t\tif ( !to.attrs.length ) {\n\t\t\tto.attrs = this._bindAttrs;\n\t\t}\n\t} );\n\n\tthis._to = parsedArgs.to;\n\n\t// Fill {@link BindChain#_bindings} with callback. When the callback is set there's only one binding.\n\tif ( parsedArgs.callback ) {\n\t\tthis._bindings.get( bindingsKeys[ 0 ] ).callback = parsedArgs.callback;\n\t}\n\n\tattachBindToListeners( this._observable, this._to );\n\n\t// Update observable._boundAttributes and observable._boundObservables.\n\tupdateBindToBound( this );\n\n\t// Set initial values of bound attributes.\n\tthis._bindAttrs.forEach( attrName => {\n\t\tupdateBoundObservableAttr( this._observable, attrName );\n\t} );\n}\n\n// Check if all entries of the array are of `String` type.\n//\n// @private\n// @param {Array} arr An array to be checked.\n// @returns {Boolean}\nfunction isStringArray( arr ) {\n\treturn arr.every( a => typeof a == 'string' );\n}\n\n// Parses and validates {@link Observable#bind}`.to( args )` arguments and returns\n// an object with a parsed structure. For example\n//\n//\t\tA.bind( 'x' ).to( B, 'a', C, 'b', call );\n//\n// becomes\n//\n//\t\t{\n//\t\t\tto: [\n//\t\t\t\t{ observable: B, attrs: [ 'a' ] },\n//\t\t\t\t{ observable: C, attrs: [ 'b' ] },\n//\t\t\t],\n//\t\t\tcallback: call\n// \t\t}\n//\n// @private\n// @param {...*} args Arguments of {@link Observable#bind}`.to( args )`.\n// @returns {Object}\nfunction parseBindToArgs( ...args ) {\n\t// Eliminate A.bind( 'x' ).to()\n\tif ( !args.length ) {\n\t\t/**\n\t\t * Invalid argument syntax in `to()`.\n\t\t *\n\t\t * @error observable-bind-to-parse-error\n\t\t */\n\t\tthrow new CKEditorError( 'observable-bind-to-parse-error: Invalid argument syntax in `to()`.' );\n\t}\n\n\tconst parsed = { to: [] };\n\tlet lastObservable;\n\n\tif ( typeof args[ args.length - 1 ] == 'function' ) {\n\t\tparsed.callback = args.pop();\n\t}\n\n\targs.forEach( a => {\n\t\tif ( typeof a == 'string' ) {\n\t\t\tlastObservable.attrs.push( a );\n\t\t} else if ( typeof a == 'object' ) {\n\t\t\tlastObservable = { observable: a, attrs: [] };\n\t\t\tparsed.to.push( lastObservable );\n\t\t} else {\n\t\t\tthrow new CKEditorError( 'observable-bind-to-parse-error: Invalid argument syntax in `to()`.' );\n\t\t}\n\t} );\n\n\treturn parsed;\n}\n\n// Synchronizes {@link module:utils/observablemixin#_boundObservables} with {@link Binding}.\n//\n// @private\n// @param {Binding} binding A binding to store in {@link Observable#_boundObservables}.\n// @param {Observable} toObservable A observable, which is a new component of `binding`.\n// @param {String} toAttrName A name of `toObservable`'s attribute, a new component of the `binding`.\nfunction updateBoundObservables( observable, binding, toObservable, toAttrName ) {\n\tconst boundObservables = observable[ boundObservablesSymbol ];\n\tconst bindingsToObservable = boundObservables.get( toObservable );\n\tconst bindings = bindingsToObservable || {};\n\n\tif ( !bindings[ toAttrName ] ) {\n\t\tbindings[ toAttrName ] = new Set();\n\t}\n\n\t// Pass the binding to a corresponding Set in `observable._boundObservables`.\n\tbindings[ toAttrName ].add( binding );\n\n\tif ( !bindingsToObservable ) {\n\t\tboundObservables.set( toObservable, bindings );\n\t}\n}\n\n// Synchronizes {@link Observable#_boundAttributes} and {@link Observable#_boundObservables}\n// with {@link BindChain}.\n//\n// Assuming the following binding being created\n//\n// \t\tA.bind( 'a', 'b' ).to( B, 'x', 'y' );\n//\n// the following bindings were initialized by {@link Observable#bind} in {@link BindChain#_bindings}:\n//\n// \t\t{\n// \t\t\ta: { observable: A, attr: 'a', to: [] },\n// \t\t\tb: { observable: A, attr: 'b', to: [] },\n// \t\t}\n//\n// Iterate over all bindings in this chain and fill their `to` properties with\n// corresponding to( ... ) arguments (components of the binding), so\n//\n// \t\t{\n// \t\t\ta: { observable: A, attr: 'a', to: [ B, 'x' ] },\n// \t\t\tb: { observable: A, attr: 'b', to: [ B, 'y' ] },\n// \t\t}\n//\n// Then update the structure of {@link Observable#_boundObservables} with updated\n// binding, so it becomes:\n//\n// \t\tMap( {\n// \t\t\tB: {\n// \t\t\t\tx: Set( [\n// \t\t\t\t\t{ observable: A, attr: 'a', to: [ [ B, 'x' ] ] }\n// \t\t\t\t] ),\n// \t\t\t\ty: Set( [\n// \t\t\t\t\t{ observable: A, attr: 'b', to: [ [ B, 'y' ] ] },\n// \t\t\t\t] )\n//\t\t\t}\n// \t\t} )\n//\n// @private\n// @param {BindChain} chain The binding initialized by {@link Observable#bind}.\nfunction updateBindToBound( chain ) {\n\tlet toAttr;\n\n\tchain._bindings.forEach( ( binding, attrName ) => {\n\t\t// Note: For a binding without a callback, this will run only once\n\t\t// like in A.bind( 'x', 'y' ).to( B, 'a', 'b' )\n\t\t// TODO: ES6 destructuring.\n\t\tchain._to.forEach( to => {\n\t\t\ttoAttr = to.attrs[ binding.callback ? 0 : chain._bindAttrs.indexOf( attrName ) ];\n\n\t\t\tbinding.to.push( [ to.observable, toAttr ] );\n\t\t\tupdateBoundObservables( chain._observable, binding, to.observable, toAttr );\n\t\t} );\n\t} );\n}\n\n// Updates an attribute of a {@link Observable} with a value\n// determined by an entry in {@link Observable#_boundAttributes}.\n//\n// @private\n// @param {Observable} observable A observable which attribute is to be updated.\n// @param {String} attrName An attribute to be updated.\nfunction updateBoundObservableAttr( observable, attrName ) {\n\tconst boundAttributes = observable[ boundAttributesSymbol ];\n\tconst binding = boundAttributes.get( attrName );\n\tlet attrValue;\n\n\t// When a binding with callback is created like\n\t//\n\t// \t\tA.bind( 'a' ).to( B, 'b', C, 'c', callback );\n\t//\n\t// collect B.b and C.c, then pass them to callback to set A.a.\n\tif ( binding.callback ) {\n\t\tattrValue = binding.callback.apply( observable, binding.to.map( to => to[ 0 ][ to[ 1 ] ] ) );\n\t} else {\n\t\tattrValue = binding.to[ 0 ];\n\t\tattrValue = attrValue[ 0 ][ attrValue[ 1 ] ];\n\t}\n\n\tif ( observable.hasOwnProperty( attrName ) ) {\n\t\tobservable[ attrName ] = attrValue;\n\t} else {\n\t\tobservable.set( attrName, attrValue );\n\t}\n}\n\n// Starts listening to changes in {@link BindChain._to} observables to update\n// {@link BindChain._observable} {@link BindChain._bindAttrs}. Also sets the\n// initial state of {@link BindChain._observable}.\n//\n// @private\n// @param {BindChain} chain The chain initialized by {@link Observable#bind}.\nfunction attachBindToListeners( observable, toBindings ) {\n\ttoBindings.forEach( to => {\n\t\tconst boundObservables = observable[ boundObservablesSymbol ];\n\t\tlet bindings;\n\n\t\t// If there's already a chain between the observables (`observable` listens to\n\t\t// `to.observable`), there's no need to create another `change` event listener.\n\t\tif ( !boundObservables.get( to.observable ) ) {\n\t\t\tobservable.listenTo( to.observable, 'change', ( evt, attrName ) => {\n\t\t\t\tbindings = boundObservables.get( to.observable )[ attrName ];\n\n\t\t\t\t// Note: to.observable will fire for any attribute change, react\n\t\t\t\t// to changes of attributes which are bound only.\n\t\t\t\tif ( bindings ) {\n\t\t\t\t\tbindings.forEach( binding => {\n\t\t\t\t\t\tupdateBoundObservableAttr( observable, binding.attr );\n\t\t\t\t\t} );\n\t\t\t\t}\n\t\t\t} );\n\t\t}\n\t} );\n}\n\nextend( ObservableMixin, EmitterMixin );\n\n/**\n * Fired when an attribute changed value.\n *\n *\t\tobservable.set( 'prop', 1 );\n *\n *\t\tobservable.on( 'change:prop', ( evt, propertyName, newValue, oldValue ) => {\n *\t\t\tconsole.log( `${ propertyName } has changed from ${ oldValue } to ${ newValue }` );\n *\t\t} )\n *\n *\t\tobservable.prop = 2; // -> 'prop has changed from 1 to 2'\n *\n * @event module:utils/observablemixin~ObservableMixin#change:{attribute}\n * @param {String} name The attribute name.\n * @param {*} value The new attribute value.\n * @param {*} oldValue The previous attribute value.\n */\n\n/**\n * Interface representing classes which mix in {@link module:utils/observablemixin~ObservableMixin}.\n *\n * @interface Observable\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/observablemixin.js\n// module id = 12\n// module chunks = 0","import toFinite from './toFinite';\n\n/**\n * Converts `value` to an integer.\n *\n * **Note:** This function is loosely based on\n * [`ToInteger`](http://www.ecma-international.org/ecma-262/6.0/#sec-tointeger).\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to convert.\n * @returns {number} Returns the converted integer.\n * @example\n *\n * _.toInteger(3.2);\n * // => 3\n *\n * _.toInteger(Number.MIN_VALUE);\n * // => 0\n *\n * _.toInteger(Infinity);\n * // => 1.7976931348623157e+308\n *\n * _.toInteger('3.2');\n * // => 3\n */\nfunction toInteger(value) {\n var result = toFinite(value),\n remainder = result % 1;\n\n return result === result ? (remainder ? result - remainder : result) : 0;\n}\n\nexport default toInteger;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/toInteger.js\n// module id = 13\n// module chunks = 0","import isArrayLike from './isArrayLike';\nimport isObjectLike from './isObjectLike';\n\n/**\n * This method is like `_.isArrayLike` except that it also checks if `value`\n * is an object.\n *\n * @static\n * @memberOf _\n * @since 4.0.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an array-like object,\n * else `false`.\n * @example\n *\n * _.isArrayLikeObject([1, 2, 3]);\n * // => true\n *\n * _.isArrayLikeObject(document.body.children);\n * // => true\n *\n * _.isArrayLikeObject('abc');\n * // => false\n *\n * _.isArrayLikeObject(_.noop);\n * // => false\n */\nfunction isArrayLikeObject(value) {\n return isObjectLike(value) && isArrayLike(value);\n}\n\nexport default isArrayLikeObject;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/isArrayLikeObject.js\n// module id = 14\n// module chunks = 0","/**\n * Checks if `value` is classified as an `Array` object.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @type {Function}\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is correctly classified,\n * else `false`.\n * @example\n *\n * _.isArray([1, 2, 3]);\n * // => true\n *\n * _.isArray(document.body.children);\n * // => false\n *\n * _.isArray('abc');\n * // => false\n *\n * _.isArray(_.noop);\n * // => false\n */\nvar isArray = Array.isArray;\n\nexport default isArray;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/isArray.js\n// module id = 15\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/* global console */\n\n/**\n * @module utils/log\n */\n\nimport { attachLinkToDocumentation } from './ckeditorerror';\n\n/**\n * The logging module.\n *\n * This object features two functions that should be used across CKEditor code base to log errors and warnings.\n * Despite being an overridable interface for native `console.*` this module serves also the goal to limit the\n * code size of a minified CKEditor package. During minification process the messages will be shortened and\n * links to their documentation will be logged to the console.\n *\n * All errors and warning should be documented in the following way:\n *\n *\t\t/**\n *\t\t * Error thrown when a plugin cannot be loaded due to JavaScript errors, lack of plugins with a given name, etc.\n *\t\t *\n *\t\t * @error plugin-load\n *\t\t * @param pluginName The name of the plugin that could not be loaded.\n *\t\t * @param moduleName The name of the module which tried to load this plugin.\n *\t\t * /\n *\t\tlog.error( 'plugin-load: It was not possible to load the \"{$pluginName}\" plugin in module \"{$moduleName}', {\n *\t\t\tpluginName: 'foo',\n *\t\t\tmoduleName: 'bar'\n *\t\t} );\n *\n * ### Warning vs Error vs Throw\n *\n * * Whenever a potentially incorrect situation occurs, which does not directly lead to an incorrect behavior,\n * log a warning.\n * * Whenever an incorrect situation occurs, but the app may continue working (although perhaps incorrectly),\n * log an error.\n * * Whenever it's really bad and it does not make sense to continue working, throw a {@link module:utils/ckeditorerror~CKEditorError}.\n *\n * @namespace\n */\nconst log = {\n\t/**\n\t * Logs an error to the console.\n\t *\n\t * Read more about error logging in the {@link module:utils/log} module.\n\t *\n\t * @param {String} message The error message in an `error-name: Error message.` format.\n\t * During the minification process the \"Error message\" part will be removed to limit the code size\n\t * and a link to this error documentation will be logged to the console.\n\t * @param {Object} [data] Additional data describing the error.\n\t */\n\terror( message, data ) {\n\t\tconsole.error( attachLinkToDocumentation( message ), data );\n\t},\n\n\t/**\n\t * Logs a warning to the console.\n\t *\n\t * Read more about error logging in the {@link module:utils/log} module.\n\t *\n\t * @param {String} message The warning message in a `warning-name: Warning message.` format.\n\t * During the minification process the \"Warning message\" part will be removed to limit the code size\n\t * and a link to this error documentation will be logged to the console.\n\t * @param {Object} [data] Additional data describing the warning.\n\t */\n\twarn( message, data ) {\n\t\tconsole.warn( attachLinkToDocumentation( message ), data );\n\t}\n};\n\nexport default log;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/log.js\n// module id = 16\n// module chunks = 0","/**\n * Checks if `value` is the\n * [language type](http://www.ecma-international.org/ecma-262/6.0/#sec-ecmascript-language-types)\n * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Lang\n * @param {*} value The value to check.\n * @returns {boolean} Returns `true` if `value` is an object, else `false`.\n * @example\n *\n * _.isObject({});\n * // => true\n *\n * _.isObject([1, 2, 3]);\n * // => true\n *\n * _.isObject(_.noop);\n * // => true\n *\n * _.isObject(null);\n * // => false\n */\nfunction isObject(value) {\n var type = typeof value;\n return !!value && (type == 'object' || type == 'function');\n}\n\nexport default isObject;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/isObject.js\n// module id = 17\n// module chunks = 0","/**\n * Gets the last element of `array`.\n *\n * @static\n * @memberOf _\n * @since 0.1.0\n * @category Array\n * @param {Array} array The array to query.\n * @returns {*} Returns the last element of `array`.\n * @example\n *\n * _.last([1, 2, 3]);\n * // => 3\n */\nfunction last(array) {\n var length = array ? array.length : 0;\n return length ? array[length - 1] : undefined;\n}\n\nexport default last;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/last.js\n// module id = 18\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/delta/deltafactory\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\nimport OperationFactory from '../operation/operationfactory';\n\nconst deserializers = new Map();\n\n/**\n * A factory class for creating operations.\n *\n * Delta is a single, from the user action point of view, change in the editable document, like insert, split or\n * rename element. Delta is composed of operations, which are unit changes needed to be done to execute user action.\n *\n * Multiple deltas are grouped into a single {@link module:engine/model/batch~Batch}.\n */\nexport default class DeltaFactory {\n\t/**\n\t * Creates InsertDelta from deserialized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json\n\t * @param {module:engine/model/document~Document} doc Document on which this delta will be applied.\n\t * @returns {module:engine/model/delta/insertdelta~InsertDelta}\n\t */\n\tstatic fromJSON( json, doc ) {\n\t\tif ( !deserializers.has( json.__className ) ) {\n\t\t\t/**\n\t\t\t * This delta has no defined deserializer.\n\t\t\t *\n\t\t\t * @error delta-fromjson-no-deserializer\n\t\t\t * @param {String} name\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'delta-fromjson-no-deserializer: This delta has no defined deserializer',\n\t\t\t\t{ name: json.__className }\n\t\t\t);\n\t\t}\n\n\t\tconst Delta = deserializers.get( json.__className );\n\n\t\tconst delta = new Delta();\n\n\t\tfor ( const operation of json.operations ) {\n\t\t\tdelta.addOperation( OperationFactory.fromJSON( operation, doc ) );\n\t\t}\n\n\t\t// Rewrite all other properties.\n\t\tfor ( const prop in json ) {\n\t\t\tif ( prop != '__className' && delta[ prop ] === undefined ) {\n\t\t\t\tdelta[ prop ] = json[ prop ];\n\t\t\t}\n\t\t}\n\n\t\treturn delta;\n\t}\n\n\t/**\n\t * Registers a class for delta factory.\n\t *\n\t * @param {Function} Delta A delta class to register.\n\t */\n\tstatic register( Delta ) {\n\t\tdeserializers.set( Delta.className, Delta );\n\t}\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/delta/deltafactory.js\n// module id = 19\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/batch\n */\n\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * `Batch` instance groups document changes ({@link module:engine/model/delta/delta~Delta deltas}). All deltas grouped in a single `Batch`\n * can be reverted together, so you can think about `Batch` as of a single undo step. If you want to extend given undo step you\n * can call another method on the same `Batch` object. If you want to create a separate undo step you can create a new `Batch`.\n *\n * For example to create two separate undo steps you can call:\n *\n *\t\tdoc.batch().insert( firstPosition, 'foo' );\n *\t\tdoc.batch().insert( secondPosition, 'bar' );\n *\n * To create a single undo step:\n *\n *\t\tconst batch = doc.batch();\n *\t\tbatch.insert( firstPosition, 'foo' );\n *\t\tbatch.insert( secondPosition, 'bar' );\n *\n * Note that all document modification methods (insert, remove, split, etc.) are chainable so you can shorten code to:\n *\n *\t\tdoc.batch().insert( firstPosition, 'foo' ).insert( secondPosition, 'bar' );\n */\nexport default class Batch {\n\t/**\n\t * Creates `Batch` instance. Not recommended to use directly, use {@link module:engine/model/document~Document#batch} instead.\n\t *\n\t * @param {module:engine/model/document~Document} document Document which this Batch changes.\n\t * @param {'transparent'|'default'} [type='default'] Type of the batch.\n\t */\n\tconstructor( document, type = 'default' ) {\n\t\t/**\n\t\t * Document which this batch changes.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/document~Document} module:engine/model/batch~Batch#document\n\t\t */\n\t\tthis.document = document;\n\n\t\t/**\n\t\t * Array of deltas which compose this batch.\n\t\t *\n\t\t * @readonly\n\t\t * @member {Array.} module:engine/model/batch~Batch#deltas\n\t\t */\n\t\tthis.deltas = [];\n\n\t\t/**\n\t\t * Type of the batch.\n\t\t *\n\t\t * Can be one of the following values:\n\t\t * * `'default'` - all \"normal\" batches, most commonly used type.\n\t\t * * `'transparent'` - batch that should be ignored by other features, i.e. initial batch or collaborative editing changes.\n\t\t *\n\t\t * @readonly\n\t\t * @member {'transparent'|'default'} module:engine/model/batch~Batch#type\n\t\t */\n\t\tthis.type = type;\n\t}\n\n\t/**\n\t * Returns this batch base version, which is equal to the base version of first delta in the batch.\n\t * If there are no deltas in the batch, it returns `null`.\n\t *\n\t * @readonly\n\t * @type {Number|null}\n\t */\n\tget baseVersion() {\n\t\treturn this.deltas.length > 0 ? this.deltas[ 0 ].baseVersion : null;\n\t}\n\n\t/**\n\t * Adds delta to the batch instance. All modification methods (insert, remove, split, etc.) use this method\n\t * to add created deltas.\n\t *\n\t * @param {module:engine/model/delta/delta~Delta} delta Delta to add.\n\t * @return {module:engine/model/delta/delta~Delta} Added delta.\n\t */\n\taddDelta( delta ) {\n\t\tdelta.batch = this;\n\t\tthis.deltas.push( delta );\n\n\t\treturn delta;\n\t}\n\n\t/**\n\t * Gets an iterable collection of operations.\n\t *\n\t * @returns {Iterable.}\n\t */\n\t* getOperations() {\n\t\tfor ( const delta of this.deltas ) {\n\t\t\tyield* delta.operations;\n\t\t}\n\t}\n}\n\n/**\n * Function to register batch methods. To make code scalable `Batch` do not have modification\n * methods built in. They can be registered using this method.\n *\n * This method checks if there is no naming collision and throws `batch-register-taken` if the method name\n * is already taken.\n *\n * Besides that no magic happens here, the method is added to the `Batch` class prototype.\n *\n * For example:\n *\n *\t\tBatch.register( 'insert', function( position, nodes ) {\n *\t\t\t// You can use a class inheriting from `Delta` if that class should handle OT in a special way.\n *\t\t\tconst delta = new Delta();\n *\n *\t\t\t// Add delta to the Batch instance. It is important to add a delta to the batch before applying any operation.\n *\t\t\tthis.addDelta( delta );\n *\n *\t\t\t// Create operations which should be components of this delta.\n *\t\t\tconst operation = new InsertOperation( position, nodes, this.document.version );\n *\n *\t\t\t// Add operation to the delta. It is important to add operation before applying it.\n *\t\t\tdelta.addOperation( operation );\n *\n *\t\t\t// Remember to apply every operation, no magic, you need to do it manually.\n *\t\t\tthis.document.applyOperation( operation );\n *\n *\t\t\t// Make this method chainable.\n *\t\t\treturn this;\n *\t\t} );\n *\n * @method module:engine/model/batch~Batch.register\n * @param {String} name Method name.\n * @param {Function} creator Method body.\n */\nexport function register( name, creator ) {\n\tif ( Batch.prototype[ name ] ) {\n\t\t/**\n\t\t * This batch method name is already taken.\n\t\t *\n\t\t * @error batch-register-taken\n\t\t * @param {String} name\n\t\t */\n\t\tthrow new CKEditorError(\n\t\t\t'model-batch-register-taken: This batch method name is already taken.',\n\t\t\t{ name } );\n\t}\n\n\tBatch.prototype[ name ] = creator;\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/batch.js\n// module id = 20\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module ui/button/buttonview\n */\n\nimport View from '../view';\nimport Template from '../template';\nimport IconView from '../icon/iconview';\nimport TooltipView from '../tooltip/tooltipview';\n\nimport { getEnvKeystrokeText } from '@ckeditor/ckeditor5-utils/src/keyboard';\n\n/**\n * The button view class.\n *\n *\t\tconst view = new ButtonView();\n *\n *\t\tview.set( {\n *\t\t\tlabel: 'A button',\n *\t\t\tkeystroke: 'Ctrl+B',\n *\t\t\ttooltip: true,\n *\t\t\twithText: true\n *\t\t} );\n *\n *\t\tview.init();\n *\n *\t\tdocument.body.append( view.element );\n *\n * @extends module:ui/view~View\n */\nexport default class ButtonView extends View {\n\t/**\n\t * @inheritDoc\n\t */\n\tconstructor( locale ) {\n\t\tsuper( locale );\n\n\t\t/**\n\t\t * The label of the button view visible to the user when {@link #withText} is `true`.\n\t\t * It can also be used to create a {@link #tooltip}.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #label\n\t\t */\n\t\tthis.set( 'label' );\n\n\t\t/**\n\t\t * (Optional) The keystroke associated with the button, i.e. CTRL+B,\n\t\t * in the string format compatible with {@link module:utils/keyboard}.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #keystroke\n\t\t */\n\t\tthis.set( 'keystroke' );\n\n\t\t/**\n\t\t * (Optional) Tooltip of the button, i.e. displayed when hovering the button with the mouse cursor.\n\t\t *\n\t\t * * If defined as a `Boolean` (e.g. `true`), then combination of `label` and `keystroke` will be set as a tooltip.\n\t\t * * If defined as a `String`, tooltip will equal the exact text of that `String`.\n\t\t * * If defined as a `Function`, `label` and `keystroke` will be passed to that function, which is to return\n\t\t * a string with the tooltip text.\n\t\t *\n\t\t *\t\tconst view = new ButtonView( locale );\n\t\t *\t\tview.tooltip = ( label, keystroke ) => `A tooltip for ${ label } and ${ keystroke }.`\n\t\t *\n\t\t * @observable\n\t\t * @default false\n\t\t * @member {Boolean|String|Function} #tooltip\n\t\t */\n\t\tthis.set( 'tooltip' );\n\n\t\t/**\n\t\t * (Optional) The position of the tooltip. See {@link module:ui/tooltip/tooltipview~TooltipView#position}\n\t\t * to learn more about the available position values.\n\t\t *\n\t\t * **Note:** It makes sense only when the {@link #tooltip `tooltip` attribute} is defined.\n\t\t *\n\t\t * @observable\n\t\t * @default 's'\n\t\t * @member {'s'|'n'} #position\n\t\t */\n\t\tthis.set( 'tooltipPosition', 's' );\n\n\t\t/**\n\t\t * The HTML type of the button. Default `button`.\n\t\t *\n\t\t * @observable\n\t\t * @member {'button'|'submit'|'reset'|'menu'} #type\n\t\t */\n\t\tthis.set( 'type', 'button' );\n\n\t\t/**\n\t\t * Controls whether the button view is \"on\". It makes sense when a feature it represents\n\t\t * is currently active, e.g. a bold button is \"on\" when the selection is in the bold text.\n\t\t *\n\t\t * To disable the button, use {@link #isEnabled} instead.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isOn\n\t\t */\n\t\tthis.set( 'isOn', false );\n\n\t\t/**\n\t\t * Controls whether the button view is enabled, i.e. it can be clicked and execute an action.\n\t\t *\n\t\t * To change the \"on\" state of the button, use {@link #isOn} instead.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isEnabled\n\t\t */\n\t\tthis.set( 'isEnabled', true );\n\n\t\t/**\n\t\t * Controls whether the button view is visible. Visible by default, buttons are hidden\n\t\t * using a CSS class.\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #isVisible\n\t\t */\n\t\tthis.set( 'isVisible', true );\n\n\t\t/**\n\t\t * (Optional) Controls whether the label of the button is hidden (e.g. an icon–only button).\n\t\t *\n\t\t * @observable\n\t\t * @member {Boolean} #withText\n\t\t */\n\t\tthis.set( 'withText', false );\n\n\t\t/**\n\t\t * (Optional) An XML {@link module:ui/icon/iconview~IconView#content content} of the icon.\n\t\t * When defined, an {@link #iconView} will be added to the button.\n\t\t *\n\t\t * @observable\n\t\t * @member {String} #icon\n\t\t */\n\t\tthis.set( 'icon' );\n\n\t\t/**\n\t\t * (Optional) Controls the `tabindex` HTML attribute of the button. By default, the button is focusable\n\t\t * but does not included in the Tab order.\n\t\t *\n\t\t * @observable\n\t\t * @default -1\n\t\t * @member {String} #tabindex\n\t\t */\n\t\tthis.set( 'tabindex', -1 );\n\n\t\t/**\n\t\t * Tooltip of the button bound to the template.\n\t\t *\n\t\t * @see #tooltip\n\t\t * @see #_getTooltipString\n\t\t * @private\n\t\t * @observable\n\t\t * @member {Boolean} #_tooltipString\n\t\t */\n\t\tthis.bind( '_tooltipString' ).to(\n\t\t\tthis, 'tooltip',\n\t\t\tthis, 'label',\n\t\t\tthis, 'keystroke',\n\t\t\tthis._getTooltipString.bind( this )\n\t\t);\n\n\t\t/**\n\t\t * Tooltip of the button view. It is configurable using the {@link #tooltip tooltip attribute}.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/tooltip/tooltipview~TooltipView} #tooltipView\n\t\t */\n\t\tthis.tooltipView = this._createTooltipView();\n\n\t\t/**\n\t\t * (Optional) The icon view of the button. Only present when the {@link #icon icon attribute} is defined.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:ui/icon/iconview~IconView} #iconView\n\t\t */\n\n\t\tconst bind = this.bindTemplate;\n\n\t\tthis.template = new Template( {\n\t\t\ttag: 'button',\n\n\t\t\tattributes: {\n\t\t\t\tclass: [\n\t\t\t\t\t'ck-button',\n\t\t\t\t\tbind.to( 'isEnabled', value => value ? 'ck-enabled' : 'ck-disabled' ),\n\t\t\t\t\tbind.if( 'isVisible', 'ck-hidden', value => !value ),\n\t\t\t\t\tbind.to( 'isOn', value => value ? 'ck-on' : 'ck-off' ),\n\t\t\t\t\tbind.if( 'withText', 'ck-button_with-text' )\n\t\t\t\t],\n\t\t\t\ttype: bind.to( 'type', value => value ? value : 'button' ),\n\t\t\t\ttabindex: bind.to( 'tabindex' )\n\t\t\t},\n\n\t\t\tchildren: [\n\t\t\t\t{\n\t\t\t\t\ttag: 'span',\n\n\t\t\t\t\tattributes: {\n\t\t\t\t\t\tclass: [ 'ck-button__label' ]\n\t\t\t\t\t},\n\n\t\t\t\t\tchildren: [\n\t\t\t\t\t\t{\n\t\t\t\t\t\t\ttext: bind.to( 'label' )\n\t\t\t\t\t\t}\n\t\t\t\t\t]\n\t\t\t\t},\n\t\t\t\tthis.tooltipView\n\t\t\t],\n\n\t\t\ton: {\n\t\t\t\tmousedown: bind.to( evt => {\n\t\t\t\t\tevt.preventDefault();\n\t\t\t\t} ),\n\n\t\t\t\tclick: bind.to( evt => {\n\t\t\t\t\t// We can't make the button disabled using the disabled attribute, because it won't be focusable.\n\t\t\t\t\t// Though, shouldn't this condition be moved to the button controller?\n\t\t\t\t\tif ( this.isEnabled ) {\n\t\t\t\t\t\tthis.fire( 'execute' );\n\t\t\t\t\t} else {\n\t\t\t\t\t\t// Prevent the default when button is disabled, to block e.g.\n\t\t\t\t\t\t// automatic form submitting. See ckeditor/ckeditor5-link#74.\n\t\t\t\t\t\tevt.preventDefault();\n\t\t\t\t\t}\n\t\t\t\t} )\n\t\t\t}\n\t\t} );\n\n\t\t/**\n\t\t * Fired when the button view is clicked. It won't be fired when the button {@link #isEnabled}\n\t\t * is `false`.\n\t\t *\n\t\t * @event execute\n\t\t */\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tinit() {\n\t\tif ( this.icon ) {\n\t\t\tconst iconView = this.iconView = new IconView();\n\n\t\t\ticonView.bind( 'content' ).to( this, 'icon' );\n\t\t\tthis.element.insertBefore( iconView.element, this.element.firstChild );\n\n\t\t\t// Make sure the icon will be destroyed along with the button.\n\t\t\tthis.addChildren( iconView );\n\t\t}\n\n\t\tsuper.init();\n\t}\n\n\t/**\n\t * Focuses the {@link #element} of the button.\n\t */\n\tfocus() {\n\t\tthis.element.focus();\n\t}\n\n\t/**\n\t * Creates a {@link module:ui/tooltip/tooltipview~TooltipView} instance and binds it with button\n\t * attributes.\n\t *\n\t * @private\n\t * @returns {module:ui/tooltip/tooltipview~TooltipView}\n\t */\n\t_createTooltipView() {\n\t\tconst tooltipView = new TooltipView();\n\n\t\ttooltipView.bind( 'text' ).to( this, '_tooltipString' );\n\t\ttooltipView.bind( 'position' ).to( this, 'tooltipPosition' );\n\n\t\treturn tooltipView;\n\t}\n\n\t/**\n\t * Gets the text for the {@link #tooltipView} from the combination of\n\t * {@link #tooltip}, {@link #label} and {@link #keystroke} attributes.\n\t *\n\t * @private\n\t * @see #tooltip\n\t * @see #_tooltipString\n\t * @param {Boolean|String|Function} tooltip Button tooltip.\n\t * @param {String} label Button label.\n\t * @param {String} keystroke Button keystroke.\n\t * @returns {String}\n\t */\n\t_getTooltipString( tooltip, label, keystroke ) {\n\t\tif ( tooltip ) {\n\t\t\tif ( typeof tooltip == 'string' ) {\n\t\t\t\treturn tooltip;\n\t\t\t} else {\n\t\t\t\tif ( keystroke ) {\n\t\t\t\t\tkeystroke = getEnvKeystrokeText( keystroke );\n\t\t\t\t}\n\n\t\t\t\tif ( tooltip instanceof Function ) {\n\t\t\t\t\treturn tooltip( label, keystroke );\n\t\t\t\t} else {\n\t\t\t\t\treturn `${ label }${ keystroke ? ` (${ keystroke })` : '' }`;\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\treturn '';\n\t}\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-ui/src/button/buttonview.js\n// module id = 21\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/view/position\n */\n\nimport TreeWalker from './treewalker';\n\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport EditableElement from './editableelement';\n\n/**\n * Position in the tree. Position is always located before or after a node.\n */\nexport default class Position {\n\t/**\n\t * Creates a position.\n\t *\n\t * @param {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment} parent Position parent.\n\t * @param {Number} offset Position offset.\n\t */\n\tconstructor( parent, offset ) {\n\t\t/**\n\t\t * Position parent.\n\t\t *\n\t\t * @member {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t\t * module:engine/view/position~Position#parent\n\t\t */\n\t\tthis.parent = parent;\n\n\t\t/**\n\t\t * Position offset.\n\t\t *\n\t\t * @member {Number} module:engine/view/position~Position#offset\n\t\t */\n\t\tthis.offset = offset;\n\t}\n\n\t/**\n\t * Node directly after the position. Equals `null` when there is no node after position or position is located\n\t * inside text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nodeAfter() {\n\t\tif ( this.parent.is( 'text' ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.parent.getChild( this.offset ) || null;\n\t}\n\n\t/**\n\t * Node directly before the position. Equals `null` when there is no node before position or position is located\n\t * inside text node.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|null}\n\t */\n\tget nodeBefore() {\n\t\tif ( this.parent.is( 'text' ) ) {\n\t\t\treturn null;\n\t\t}\n\n\t\treturn this.parent.getChild( this.offset - 1 ) || null;\n\t}\n\n\t/**\n\t * Is `true` if position is at the beginning of its {@link module:engine/view/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtStart() {\n\t\treturn this.offset === 0;\n\t}\n\n\t/**\n\t * Is `true` if position is at the end of its {@link module:engine/view/position~Position#parent parent}, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isAtEnd() {\n\t\tconst endOffset = this.parent.is( 'text' ) ? this.parent.data.length : this.parent.childCount;\n\n\t\treturn this.offset === endOffset;\n\t}\n\n\t/**\n\t * Position's root, that is the root of the position's parent element.\n\t *\n\t * @readonly\n\t * @type {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment}\n\t */\n\tget root() {\n\t\treturn this.parent.root;\n\t}\n\n\t/**\n\t * {@link module:engine/view/editableelement~EditableElement EditableElement} instance that contains this position, or `null` if\n\t * position is not inside an editable element.\n\t *\n\t * @type {module:engine/view/editableelement~EditableElement|null}\n\t */\n\tget editableElement() {\n\t\tlet editable = this.parent;\n\n\t\twhile ( !( editable instanceof EditableElement ) ) {\n\t\t\tif ( editable.parent ) {\n\t\t\t\teditable = editable.parent;\n\t\t\t} else {\n\t\t\t\treturn null;\n\t\t\t}\n\t\t}\n\n\t\treturn editable;\n\t}\n\n\t/**\n\t * Returns a new instance of Position with offset incremented by `shift` value.\n\t *\n\t * @param {Number} shift How position offset should get changed. Accepts negative values.\n\t * @returns {module:engine/view/position~Position} Shifted position.\n\t */\n\tgetShiftedBy( shift ) {\n\t\tconst shifted = Position.createFromPosition( this );\n\n\t\tconst offset = shifted.offset + shift;\n\t\tshifted.offset = offset < 0 ? 0 : offset;\n\n\t\treturn shifted;\n\t}\n\n\t/**\n\t * Gets the farthest position which matches the callback using\n\t * {@link module:engine/view/treewalker~TreeWalker TreeWalker}.\n\t *\n\t * For example:\n\t *\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text' ); //

{}foo

->

foo[]

\n\t * \t\tgetLastMatchingPosition( value => value.type == 'text', { direction: 'backward' } ); //

foo[]

->

{}foo

\n\t * \t\tgetLastMatchingPosition( value => false ); // Do not move the position.\n\t *\n\t * @param {Function} skip Callback function. Gets {@link module:engine/view/treewalker~TreeWalkerValue} and should\n\t * return `true` if the value should be skipped or `false` if not.\n\t * @param {Object} options Object with configuration options. See {@link module:engine/view/treewalker~TreeWalker}.\n\t *\n\t * @returns {module:engine/view/position~Position} The position after the last item which matches the `skip` callback test.\n\t */\n\tgetLastMatchingPosition( skip, options = {} ) {\n\t\toptions.startPosition = this;\n\n\t\tconst treeWalker = new TreeWalker( options );\n\t\ttreeWalker.skip( skip );\n\n\t\treturn treeWalker.position;\n\t}\n\n\t/**\n\t * Returns ancestors array of this position, that is this position's parent and it's ancestors.\n\t *\n\t * @returns {Array} Array with ancestors.\n\t */\n\tgetAncestors() {\n\t\tif ( this.parent.is( 'documentFragment' ) ) {\n\t\t\treturn [ this.parent ];\n\t\t} else {\n\t\t\treturn this.parent.getAncestors( { includeSelf: true } );\n\t\t}\n\t}\n\n\t/**\n\t * Returns a {@link module:engine/view/node~Node} or {@link module:engine/view/documentfragment~DocumentFragment}\n\t * which is a common ancestor of both positions.\n\t *\n\t * @param {module:engine/view/position~Position} position\n\t * @returns {module:engine/view/node~Node|module:engine/view/documentfragment~DocumentFragment|null}\n\t */\n\tgetCommonAncestor( position ) {\n\t\tconst ancestorsA = this.getAncestors();\n\t\tconst ancestorsB = position.getAncestors();\n\n\t\tlet i = 0;\n\n\t\twhile ( ancestorsA[ i ] == ancestorsB[ i ] && ancestorsA[ i ] ) {\n\t\t\ti++;\n\t\t}\n\n\t\treturn i === 0 ? null : ancestorsA[ i - 1 ];\n\t}\n\n\t/**\n\t * Checks whether this position equals given position.\n\t *\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} True if positions are same.\n\t */\n\tisEqual( otherPosition ) {\n\t\treturn ( this.parent == otherPosition.parent && this.offset == otherPosition.offset );\n\t}\n\n\t/**\n\t * Checks whether this position is located before given position. When method returns `false` it does not mean that\n\t * this position is after give one. Two positions may be located inside separate roots and in that situation this\n\t * method will still return `false`.\n\t *\n\t * @see module:engine/view/position~Position#isAfter\n\t * @see module:engine/view/position~Position#compareWith\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} Returns `true` if this position is before given position.\n\t */\n\tisBefore( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'before';\n\t}\n\n\t/**\n\t * Checks whether this position is located after given position. When method returns `false` it does not mean that\n\t * this position is before give one. Two positions may be located inside separate roots and in that situation this\n\t * method will still return `false`.\n\t *\n\t * @see module:engine/view/position~Position#isBefore\n\t * @see module:engine/view/position~Position#compareWith\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {Boolean} Returns `true` if this position is after given position.\n\t */\n\tisAfter( otherPosition ) {\n\t\treturn this.compareWith( otherPosition ) == 'after';\n\t}\n\n\t/**\n\t * Checks whether this position is before, after or in same position that other position. Two positions may be also\n\t * different when they are located in separate roots.\n\t *\n\t * @param {module:engine/view/position~Position} otherPosition Position to compare with.\n\t * @returns {module:engine/view/position~PositionRelation}\n\t */\n\tcompareWith( otherPosition ) {\n\t\tif ( this.isEqual( otherPosition ) ) {\n\t\t\treturn 'same';\n\t\t}\n\n\t\t// If positions have same parent.\n\t\tif ( this.parent === otherPosition.parent ) {\n\t\t\treturn this.offset - otherPosition.offset < 0 ? 'before' : 'after';\n\t\t}\n\n\t\t// Get path from root to position's parent element.\n\t\tconst path = this.getAncestors();\n\t\tconst otherPath = otherPosition.getAncestors();\n\n\t\t// Compare both path arrays to find common ancestor.\n\t\tconst result = compareArrays( path, otherPath );\n\n\t\tlet commonAncestorIndex;\n\n\t\tswitch ( result ) {\n\t\t\tcase 0:\n\t\t\t\t// No common ancestors found.\n\t\t\t\treturn 'different';\n\n\t\t\tcase 'prefix':\n\t\t\t\tcommonAncestorIndex = path.length - 1;\n\t\t\t\tbreak;\n\n\t\t\tcase 'extension':\n\t\t\t\tcommonAncestorIndex = otherPath.length - 1;\n\t\t\t\tbreak;\n\n\t\t\tdefault:\n\t\t\t\tcommonAncestorIndex = result - 1;\n\t\t}\n\n\t\t// Common ancestor of two positions.\n\t\tconst commonAncestor = path[ commonAncestorIndex ];\n\t\tconst nextAncestor1 = path[ commonAncestorIndex + 1 ];\n\t\tconst nextAncestor2 = otherPath[ commonAncestorIndex + 1 ];\n\n\t\t// Check if common ancestor is not one of the parents.\n\t\tif ( commonAncestor === this.parent ) {\n\t\t\tconst index = this.offset - nextAncestor2.index;\n\n\t\t\treturn index <= 0 ? 'before' : 'after';\n\t\t} else if ( commonAncestor === otherPosition.parent ) {\n\t\t\tconst index = nextAncestor1.index - otherPosition.offset;\n\n\t\t\treturn index < 0 ? 'before' : 'after';\n\t\t}\n\n\t\tconst index = nextAncestor1.index - nextAncestor2.index;\n\n\t\t// Compare indexes of next ancestors inside common one.\n\t\treturn index < 0 ? 'before' : 'after';\n\t}\n\n\t/**\n\t * Creates position at the given location. The location can be specified as:\n\t *\n\t * * a {@link module:engine/view/position~Position position},\n\t * * parent element and offset (offset defaults to `0`),\n\t * * parent element and `'end'` (sets position at the end of that element),\n\t * * {@link module:engine/view/item~Item view item} and `'before'` or `'after'` (sets position before or after given view item).\n\t *\n\t * This method is a shortcut to other constructors such as:\n\t *\n\t * * {@link module:engine/view/position~Position.createBefore},\n\t * * {@link module:engine/view/position~Position.createAfter},\n\t * * {@link module:engine/view/position~Position.createFromPosition}.\n\t *\n\t * @param {module:engine/view/item~Item|module:engine/model/position~Position} itemOrPosition\n\t * @param {Number|'end'|'before'|'after'} [offset=0] Offset or one of the flags. Used only when\n\t * first parameter is a {@link module:engine/view/item~Item view item}.\n\t */\n\tstatic createAt( itemOrPosition, offset ) {\n\t\tif ( itemOrPosition instanceof Position ) {\n\t\t\treturn this.createFromPosition( itemOrPosition );\n\t\t} else {\n\t\t\tconst node = itemOrPosition;\n\n\t\t\tif ( offset == 'end' ) {\n\t\t\t\toffset = node.is( 'text' ) ? node.data.length : node.childCount;\n\t\t\t} else if ( offset == 'before' ) {\n\t\t\t\treturn this.createBefore( node );\n\t\t\t} else if ( offset == 'after' ) {\n\t\t\t\treturn this.createAfter( node );\n\t\t\t} else if ( !offset ) {\n\t\t\t\toffset = 0;\n\t\t\t}\n\n\t\t\treturn new Position( node, offset );\n\t\t}\n\t}\n\n\t/**\n\t * Creates a new position after given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item after which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic createAfter( item ) {\n\t\t// TextProxy is not a instance of Node so we need do handle it in specific way.\n\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\treturn new Position( item.textNode, item.offsetInText + item.data.length );\n\t\t}\n\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You can not make a position after a root.\n\t\t\t *\n\t\t\t * @error view-position-after-root\n\t\t\t * @param {module:engine/view/node~Node} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-position-after-root: You can not make position after root.', { root: item } );\n\t\t}\n\n\t\treturn new Position( item.parent, item.index + 1 );\n\t}\n\n\t/**\n\t * Creates a new position before given view item.\n\t *\n\t * @param {module:engine/view/item~Item} item View item before which the position should be located.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic createBefore( item ) {\n\t\t// TextProxy is not a instance of Node so we need do handle it in specific way.\n\t\tif ( item.is( 'textProxy' ) ) {\n\t\t\treturn new Position( item.textNode, item.offsetInText );\n\t\t}\n\n\t\tif ( !item.parent ) {\n\t\t\t/**\n\t\t\t * You cannot make a position before a root.\n\t\t\t *\n\t\t\t * @error view-position-before-root\n\t\t\t * @param {module:engine/view/node~Node} root\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'view-position-before-root: You can not make position before root.', { root: item } );\n\t\t}\n\n\t\treturn new Position( item.parent, item.index );\n\t}\n\n\t/**\n\t * Creates and returns a new instance of `Position`, which is equal to the passed position.\n\t *\n\t * @param {module:engine/view/position~Position} position Position to be cloned.\n\t * @returns {module:engine/view/position~Position}\n\t */\n\tstatic createFromPosition( position ) {\n\t\treturn new this( position.parent, position.offset );\n\t}\n}\n\n/**\n * A flag indicating whether this position is `'before'` or `'after'` or `'same'` as given position.\n * If positions are in different roots `'different'` flag is returned.\n *\n * @typedef {String} module:engine/view/position~PositionRelation\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/view/position.js\n// module id = 22\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/writer\n */\n\nimport Node from './node';\nimport Text from './text';\nimport TextProxy from './textproxy';\nimport Range from './range';\nimport DocumentFragment from './documentfragment';\nimport NodeList from './nodelist';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\n\n/**\n * Contains functions used for composing model tree, grouped together under \"model writer\" name. Those functions\n * are built on top of {@link module:engine/model/node~Node node}, and it's child classes', APIs.\n *\n * Model writer API has multiple advantages and it is highly recommended to use it when changing model tree and nodes:\n * * model writer API {@link module:engine/model/writer~writer.normalizeNodes normalizes inserted nodes}, which means that you can insert\n * not only {@link module:engine/model/node~Node nodes}, but also `String`s, {@link module:engine/model/textproxy~TextProxy text proxies}\n * and\n * {@link module:engine/model/documentfragment~DocumentFragment document fragments},\n * * model writer API operates on {@link module:engine/model/position~Position positions}, which means that you have\n * better control over manipulating model tree as positions operate on offsets rather than indexes,\n * * model writer API automatically merges {@link module:engine/model/text~Text text nodes} with same attributes, which means\n * lower memory usage and better efficiency.\n *\n * @namespace writer\n */\nconst writer = {\n\tinsert,\n\tremove,\n\tmove,\n\tsetAttribute,\n\tremoveAttribute,\n\tnormalizeNodes\n};\n\nexport default writer;\n\n/**\n * Inserts given nodes at given position.\n *\n * @function module:engine/model/writer~writer.insert\n * @param {module:engine/model/position~Position} position Position at which nodes should be inserted.\n * @param {module:engine/model/node~NodeSet} nodes Nodes to insert.\n * @returns {module:engine/model/range~Range} Range spanning over inserted elements.\n */\nexport function insert( position, nodes ) {\n\tnodes = normalizeNodes( nodes );\n\n\t// We have to count offset before inserting nodes because they can get merged and we would get wrong offsets.\n\tconst offset = nodes.reduce( ( sum, node ) => sum + node.offsetSize, 0 );\n\tconst parent = position.parent;\n\n\t// Insertion might be in a text node, we should split it if that's the case.\n\t_splitNodeAtPosition( position );\n\tconst index = position.index;\n\n\t// Insert nodes at given index. After splitting we have a proper index and insertion is between nodes,\n\t// using basic `Element` API.\n\tparent.insertChildren( index, nodes );\n\n\t// Merge text nodes, if possible. Merging is needed only at points where inserted nodes \"touch\" \"old\" nodes.\n\t_mergeNodesAtIndex( parent, index + nodes.length );\n\t_mergeNodesAtIndex( parent, index );\n\n\treturn new Range( position, position.getShiftedBy( offset ) );\n}\n\n/**\n * Removed nodes in given range. Only {@link module:engine/model/range~Range#isFlat flat} ranges are accepted.\n *\n * @function module:engine/model/writer~writer.remove\n * @param {module:engine/model/range~Range} range Range containing nodes to remove.\n * @returns {Array.}\n */\nexport function remove( range ) {\n\tif ( !range.isFlat ) {\n\t\t/**\n\t\t * Trying to remove a range which starts and ends in different element.\n\t\t *\n\t\t * @error model-writer-remove-range-not-flat\n\t\t */\n\t\tthrow new CKEditorError( 'model-writer-remove-range-not-flat: ' +\n\t\t\t'Trying to remove a range which starts and ends in different element.' );\n\t}\n\n\tconst parent = range.start.parent;\n\n\t// Range may be inside text nodes, we have to split them if that's the case.\n\t_splitNodeAtPosition( range.start );\n\t_splitNodeAtPosition( range.end );\n\n\t// Remove the text nodes using basic `Element` API.\n\tconst removed = parent.removeChildren( range.start.index, range.end.index - range.start.index );\n\n\t// Merge text nodes, if possible. After some nodes were removed, node before and after removed range will be\n\t// touching at the position equal to the removed range beginning. We check merging possibility there.\n\t_mergeNodesAtIndex( parent, range.start.index );\n\n\treturn removed;\n}\n\n/**\n * Moves nodes in given range to given target position. Only {@link module:engine/model/range~Range#isFlat flat} ranges are accepted.\n *\n * @param {module:engine/model/range~Range} sourceRange Range containing nodes to move.\n * @param {module:engine/model/position~Position} targetPosition Position to which nodes should be moved.\n * @returns {module:engine/model/range~Range} Range containing moved nodes.\n */\nexport function move( sourceRange, targetPosition ) {\n\tif ( !sourceRange.isFlat ) {\n\t\t/**\n\t\t * Trying to move a range which starts and ends in different element.\n\t\t *\n\t\t * @error model-writer-move-range-not-flat\n\t\t */\n\t\tthrow new CKEditorError( 'model-writer-move-range-not-flat: ' +\n\t\t\t'Trying to move a range which starts and ends in different element.' );\n\t}\n\n\tconst nodes = this.remove( sourceRange );\n\n\t// We have to fix `targetPosition` because model changed after nodes from `sourceRange` got removed and\n\t// that change might have an impact on `targetPosition`.\n\ttargetPosition = targetPosition._getTransformedByDeletion( sourceRange.start, sourceRange.end.offset - sourceRange.start.offset );\n\n\treturn this.insert( targetPosition, nodes );\n}\n\n/**\n * Sets given attribute on nodes in given range.\n *\n * @param {module:engine/model/range~Range} range Range containing nodes that should have the attribute set.\n * @param {String} key Key of attribute to set.\n * @param {*} value Attribute value.\n */\nexport function setAttribute( range, key, value ) {\n\t// Range might start or end in text nodes, so we have to split them.\n\t_splitNodeAtPosition( range.start );\n\t_splitNodeAtPosition( range.end );\n\n\t// Iterate over all items in the range.\n\tfor ( const item of range.getItems() ) {\n\t\t// Iterator will return `TextProxy` instances but we know that those text proxies will\n\t\t// always represent full text nodes (this is guaranteed thanks to splitting we did before).\n\t\t// So, we can operate on those text proxies' text nodes.\n\t\tconst node = item.is( 'textProxy' ) ? item.textNode : item;\n\n\t\tif ( value !== null ) {\n\t\t\tnode.setAttribute( key, value );\n\t\t} else {\n\t\t\tnode.removeAttribute( key );\n\t\t}\n\n\t\t// After attributes changing it may happen that some text nodes can be merged. Try to merge with previous node.\n\t\t_mergeNodesAtIndex( node.parent, node.index );\n\t}\n\n\t// Try to merge last changed node with it's previous sibling (not covered by the loop above).\n\t_mergeNodesAtIndex( range.end.parent, range.end.index );\n}\n\n/**\n * Removes given attribute from nodes in given range.\n *\n * @param {module:engine/model/range~Range} range Range containing nodes that should have the attribute removed.\n * @param {String} key Key of attribute to remove.\n */\nexport function removeAttribute( range, key ) {\n\tthis.setAttribute( range, key, null );\n}\n\n/**\n * Normalizes given object or an array of objects to an array of {@link module:engine/model/node~Node nodes}. See\n * {@link module:engine/model/node~NodeSet NodeSet} for details on how normalization is performed.\n *\n * @param {module:engine/model/node~NodeSet} nodes Objects to normalize.\n * @returns {Array.} Normalized nodes.\n */\nexport function normalizeNodes( nodes ) {\n\tconst normalized = [];\n\n\tif ( !( nodes instanceof Array ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Convert instances of classes other than Node.\n\tfor ( let i = 0; i < nodes.length; i++ ) {\n\t\tif ( typeof nodes[ i ] == 'string' ) {\n\t\t\tnormalized.push( new Text( nodes[ i ] ) );\n\t\t} else if ( nodes[ i ] instanceof TextProxy ) {\n\t\t\tnormalized.push( new Text( nodes[ i ].data, nodes[ i ].getAttributes() ) );\n\t\t} else if ( nodes[ i ] instanceof DocumentFragment || nodes[ i ] instanceof NodeList ) {\n\t\t\tfor ( const child of nodes[ i ] ) {\n\t\t\t\tnormalized.push( child );\n\t\t\t}\n\t\t} else if ( nodes[ i ] instanceof Node ) {\n\t\t\tnormalized.push( nodes[ i ] );\n\t\t}\n\t\t// Skip unrecognized type.\n\t}\n\n\t// Merge text nodes.\n\tfor ( let i = 1; i < normalized.length; i++ ) {\n\t\tconst node = normalized[ i ];\n\t\tconst prev = normalized[ i - 1 ];\n\n\t\tif ( node instanceof Text && prev instanceof Text && _haveSameAttributes( node, prev ) ) {\n\t\t\t// Doing this instead changing prev.data because .data is readonly.\n\t\t\tnormalized.splice( i - 1, 2, new Text( prev.data + node.data, prev.getAttributes() ) );\n\t\t\ti--;\n\t\t}\n\t}\n\n\treturn normalized;\n}\n\n/**\n * Checks if nodes before and after given index in given element are {@link module:engine/model/text~Text text nodes} and\n * merges them into one node if they have same attributes.\n *\n * Merging is done by removing two text nodes and inserting a new text node containing data from both merged text nodes.\n *\n * @ignore\n * @private\n * @param {module:engine/model/element~Element} element Parent element of nodes to merge.\n * @param {Number} index Index between nodes to merge.\n */\nfunction _mergeNodesAtIndex( element, index ) {\n\tconst nodeBefore = element.getChild( index - 1 );\n\tconst nodeAfter = element.getChild( index );\n\n\t// Check if both of those nodes are text objects with same attributes.\n\tif ( nodeBefore && nodeAfter && nodeBefore.is( 'text' ) && nodeAfter.is( 'text' ) && _haveSameAttributes( nodeBefore, nodeAfter ) ) {\n\t\t// Append text of text node after index to the before one.\n\t\tconst mergedNode = new Text( nodeBefore.data + nodeAfter.data, nodeBefore.getAttributes() );\n\n\t\t// Remove separate text nodes.\n\t\telement.removeChildren( index - 1, 2 );\n\n\t\t// Insert merged text node.\n\t\telement.insertChildren( index - 1, mergedNode );\n\t}\n}\n\n/**\n * Checks if given position is in a text node, and if so, splits the text node in two text nodes, each of them\n * containing a part of original text node.\n *\n * @ignore\n * @private\n * @param {module:engine/model/position~Position} position Position at which node should be split.\n */\nfunction _splitNodeAtPosition( position ) {\n\tconst textNode = position.textNode;\n\tconst element = position.parent;\n\n\tif ( textNode ) {\n\t\tconst offsetDiff = position.offset - textNode.startOffset;\n\t\tconst index = textNode.index;\n\n\t\telement.removeChildren( index, 1 );\n\n\t\tconst firstPart = new Text( textNode.data.substr( 0, offsetDiff ), textNode.getAttributes() );\n\t\tconst secondPart = new Text( textNode.data.substr( offsetDiff ), textNode.getAttributes() );\n\n\t\telement.insertChildren( index, [ firstPart, secondPart ] );\n\t}\n}\n\n/**\n * Checks whether two given nodes have same attributes.\n *\n * @ignore\n * @private\n * @param {module:engine/model/node~Node} nodeA Node to check.\n * @param {module:engine/model/node~Node} nodeB Node to check.\n * @returns {Boolean} `true` if nodes have same attributes, `false` otherwise.\n */\nfunction _haveSameAttributes( nodeA, nodeB ) {\n\tconst iteratorA = nodeA.getAttributes();\n\tconst iteratorB = nodeB.getAttributes();\n\n\tfor ( const attr of iteratorA ) {\n\t\tif ( attr[ 1 ] !== nodeB.getAttribute( attr[ 0 ] ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\titeratorB.next();\n\t}\n\n\treturn iteratorB.next().done;\n}\n\n/**\n * Value that can be normalized to an array of {@link module:engine/model/node~Node nodes}.\n *\n * Non-arrays are normalized as follows:\n * * {@link module:engine/model/node~Node Node} is left as is,\n * * {@link module:engine/model/textproxy~TextProxy TextProxy} and `String` are normalized to {@link module:engine/model/text~Text Text},\n * * {@link module:engine/model/nodelist~NodeList NodeList} is normalized to an array containing all nodes that are in that node list,\n * * {@link module:engine/model/documentfragment~DocumentFragment DocumentFragment} is normalized to an array containing all of it's\n * * children.\n *\n * Arrays are processed item by item like non-array values and flattened to one array. Normalization always results in\n * a flat array of {@link module:engine/model/node~Node nodes}. Consecutive text nodes (or items normalized to text nodes) will be\n * merged if they have same attributes.\n *\n * @typedef {module:engine/model/node~Node|module:engine/model/textproxy~TextProxy|String|\n * module:engine/model/nodelist~NodeList|module:engine/model/documentfragment~DocumentFragment|Iterable}\n * module:engine/model/node~NodeSet\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/writer.js\n// module id = 23\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/delta/delta\n */\n\nimport clone from '@ckeditor/ckeditor5-utils/src/lib/lodash/clone';\nimport DeltaFactory from './deltafactory';\n\n/**\n * Base class for all deltas.\n *\n * Delta is a single, from the user action point of view, change in the editable document, like insert, split or\n * rename element. Delta is composed of operations, which are unit changes needed to be done to execute user action.\n *\n * Multiple deltas are grouped into a single {@link module:engine/model/batch~Batch}.\n */\nexport default class Delta {\n\t/**\n\t * Creates a delta instance.\n\t */\n\tconstructor() {\n\t\t/**\n\t\t * {@link module:engine/model/batch~Batch} which delta is a part of. This property is null by default and set by the\n\t\t * {@link module:engine/model/batch~Batch#addDelta} method.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/batch~Batch} module:engine/model/delta/delta~Delta#batch\n\t\t */\n\t\tthis.batch = null;\n\n\t\t/**\n\t\t * Array of operations which compose delta.\n\t\t *\n\t\t * @readonly\n\t\t * @member {module:engine/model/operation/operation~Operation[]} module:engine/model/delta/delta~Delta#operations\n\t\t */\n\t\tthis.operations = [];\n\t}\n\n\t/**\n\t * Returns delta base version which is equal to the base version of the first operation in delta. If there\n\t * are no operations in delta, returns `null`.\n\t *\n\t * @see module:engine/model/document~Document\n\t * @type {Number|null}\n\t */\n\tget baseVersion() {\n\t\tif ( this.operations.length > 0 ) {\n\t\t\treturn this.operations[ 0 ].baseVersion;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * @param {Number} baseVersion\n\t */\n\tset baseVersion( baseVersion ) {\n\t\tfor ( const operation of this.operations ) {\n\t\t\toperation.baseVersion = baseVersion++;\n\t\t}\n\t}\n\n\t/**\n\t * A class that will be used when creating reversed delta.\n\t *\n\t * @private\n\t * @type {Function}\n\t */\n\tget _reverseDeltaClass() {\n\t\treturn Delta;\n\t}\n\n\t/**\n\t * Delta type.\n\t *\n\t * @readonly\n\t * @member {String} #type\n\t */\n\n\t/**\n\t * Add operation to the delta.\n\t *\n\t * @param {module:engine/model/operation/operation~Operation} operation Operation instance.\n\t */\n\taddOperation( operation ) {\n\t\toperation.delta = this;\n\t\tthis.operations.push( operation );\n\n\t\treturn operation;\n\t}\n\n\t/**\n\t * Creates and returns a delta that has the same parameters as this delta.\n\t *\n\t * @returns {module:engine/model/delta/delta~Delta} Clone of this delta.\n\t */\n\tclone() {\n\t\tconst delta = new this.constructor();\n\n\t\tfor ( const op of this.operations ) {\n\t\t\tdelta.addOperation( op.clone() );\n\t\t}\n\n\t\treturn delta;\n\t}\n\n\t/**\n\t * Creates and returns a reverse delta. Reverse delta when executed right after the original delta will bring back\n\t * tree model state to the point before the original delta execution. In other words, it reverses changes done\n\t * by the original delta.\n\t *\n\t * Keep in mind that tree model state may change since executing the original delta, so reverse delta may be \"outdated\".\n\t * In that case you will need to {@link module:engine/model/delta/transform~transform} it by all deltas that were executed after\n\t * the original delta.\n\t *\n\t * @returns {module:engine/model/delta/delta~Delta} Reversed delta.\n\t */\n\tgetReversed() {\n\t\tconst delta = new this._reverseDeltaClass();\n\n\t\tfor ( const op of this.operations ) {\n\t\t\tdelta.addOperation( op.getReversed() );\n\t\t}\n\n\t\tdelta.operations.reverse();\n\n\t\tfor ( let i = 0; i < delta.operations.length; i++ ) {\n\t\t\tdelta.operations[ i ].baseVersion = this.operations[ this.operations.length - 1 ].baseVersion + i + 1;\n\t\t}\n\n\t\treturn delta;\n\t}\n\n\t/**\n\t * Custom toJSON method to make deltas serializable.\n\t *\n\t * @returns {Object} Clone of this delta with added class name.\n\t */\n\ttoJSON() {\n\t\tconst json = clone( this );\n\n\t\tjson.__className = this.constructor.className;\n\n\t\t// Remove parent batch to avoid circular dependencies.\n\t\tdelete json.batch;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Delta class name. Used by {@link #toJSON} method for serialization and\n\t * {@link module:engine/model/delta/deltafactory~DeltaFactory.fromJSON} during deserialization.\n\t *\n\t * @type {String}\n\t * @readonly\n\t */\n\tstatic get className() {\n\t\treturn 'engine.model.delta.Delta';\n\t}\n}\n\nDeltaFactory.register( Delta );\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/delta/delta.js\n// module id = 24\n// module chunks = 0","import arrayPush from './_arrayPush';\nimport isFlattenable from './_isFlattenable';\n\n/**\n * The base implementation of `_.flatten` with support for restricting flattening.\n *\n * @private\n * @param {Array} array The array to flatten.\n * @param {number} depth The maximum recursion depth.\n * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.\n * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.\n * @param {Array} [result=[]] The initial result value.\n * @returns {Array} Returns the new flattened array.\n */\nfunction baseFlatten(array, depth, predicate, isStrict, result) {\n var index = -1,\n length = array.length;\n\n predicate || (predicate = isFlattenable);\n result || (result = []);\n\n while (++index < length) {\n var value = array[index];\n if (depth > 0 && predicate(value)) {\n if (depth > 1) {\n // Recursively flatten arrays (susceptible to call stack limits).\n baseFlatten(value, depth - 1, predicate, isStrict, result);\n } else {\n arrayPush(result, value);\n }\n } else if (!isStrict) {\n result[result.length] = value;\n }\n }\n return result;\n}\n\nexport default baseFlatten;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/_baseFlatten.js\n// module id = 25\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/text\n */\n\nimport Node from './node';\n\n/**\n * Model text node. Type of {@link module:engine/model/node~Node node} that contains {@link module:engine/model/text~Text#data text data}.\n *\n * **Important:** see {@link module:engine/model/node~Node} to read about restrictions using `Text` and `Node` API.\n *\n * **Note:** keep in mind that `Text` instances might indirectly got removed from model tree when model is changed.\n * This happens when {@link module:engine/model/writer~writer model writer} is used to change model and the text node is merged with\n * another text node. Then, both text nodes are removed and a new text node is inserted into the model. Because of\n * this behavior, keeping references to `Text` is not recommended. Instead, consider creating\n * {@link module:engine/model/liveposition~LivePosition live position} placed before the text node.\n */\nexport default class Text extends Node {\n\t/**\n\t * Creates a text node.\n\t *\n\t * @param {String} data Node's text.\n\t * @param {Object} [attrs] Node's attributes. See {@link module:utils/tomap~toMap} for a list of accepted values.\n\t */\n\tconstructor( data, attrs ) {\n\t\tsuper( attrs );\n\n\t\t/**\n\t\t * Text data contained in this text node.\n\t\t *\n\t\t * @type {String}\n\t\t */\n\t\tthis.data = data || '';\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget offsetSize() {\n\t\treturn this.data.length;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tis( type ) {\n\t\treturn type == 'text';\n\t}\n\n\t/**\n\t * Creates a copy of this text node and returns it. Created text node has same text data and attributes as original text node.\n\t */\n\tclone() {\n\t\treturn new Text( this.data, this.getAttributes() );\n\t}\n\n\t/**\n\t * Converts `Text` instance to plain object and returns it.\n\t *\n\t * @returns {Object} `Text` instance converted to plain object.\n\t */\n\ttoJSON() {\n\t\tconst json = super.toJSON();\n\n\t\tjson.data = this.data;\n\n\t\treturn json;\n\t}\n\n\t/**\n\t * Creates a `Text` instance from given plain object (i.e. parsed JSON string).\n\t *\n\t * @param {Object} json Plain object to be converted to `Text`.\n\t * @returns {module:engine/model/text~Text} `Text` instance created using given plain object.\n\t */\n\tstatic fromJSON( json ) {\n\t\treturn new Text( json.data, json.attributes );\n\t}\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/text.js\n// module id = 26\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/view/element\n */\n\nimport Node from './node';\nimport Text from './text';\nimport objectToMap from '@ckeditor/ckeditor5-utils/src/objecttomap';\nimport isIterable from '@ckeditor/ckeditor5-utils/src/isiterable';\nimport isPlainObject from '@ckeditor/ckeditor5-utils/src/lib/lodash/isPlainObject';\nimport Matcher from './matcher';\n\n/**\n * View element.\n *\n * Editing engine does not define fixed HTML DTD. This is why the type of the {@link module:engine/view/element~Element} need to\n * be defined by the feature developer. Creating an element you should use {@link module:engine/view/containerelement~ContainerElement}\n * class, {@link module:engine/view/attributeelement~AttributeElement} class or {@link module:engine/view/emptyelement~EmptyElement} class.\n *\n * Note that for view elements which are not created from model, like elements from mutations, paste or\n * {@link module:engine/controller/datacontroller~DataController#set data.set} it is not possible to define the type of the element, so\n * these will be instances of the {@link module:engine/view/element~Element}.\n *\n * @extends module:engine/view/node~Node\n */\nexport default class Element extends Node {\n\t/**\n\t * Creates a view element.\n\t *\n\t * Attributes can be passed in various formats:\n\t *\n\t *\t\tnew Element( 'div', { 'class': 'editor', 'contentEditable': 'true' } ); // object\n\t *\t\tnew Element( 'div', [ [ 'class', 'editor' ], [ 'contentEditable', 'true' ] ] ); // map-like iterator\n\t *\t\tnew Element( 'div', mapOfAttributes ); // map\n\t *\n\t * @param {String} name Node name.\n\t * @param {Object|Iterable} [attrs] Collection of attributes.\n\t * @param {module:engine/view/node~Node|Iterable.} [children]\n\t * List of nodes to be inserted into created element.\n\t */\n\tconstructor( name, attrs, children ) {\n\t\tsuper();\n\n\t\t/**\n\t\t * Name of the element.\n\t\t *\n\t\t * @readonly\n\t\t * @member {String}\n\t\t */\n\t\tthis.name = name;\n\n\t\t/**\n\t\t * Map of attributes, where attributes names are keys and attributes values are values.\n\t\t *\n\t\t * @protected\n\t\t * @member {Map} #_attrs\n\t\t */\n\t\tif ( isPlainObject( attrs ) ) {\n\t\t\tthis._attrs = objectToMap( attrs );\n\t\t} else {\n\t\t\tthis._attrs = new Map( attrs );\n\t\t}\n\n\t\t/**\n\t\t * Array of child nodes.\n\t\t *\n\t\t * @protected\n\t\t * @member {Array.}\n\t\t */\n\t\tthis._children = [];\n\n\t\tif ( children ) {\n\t\t\tthis.insertChildren( 0, children );\n\t\t}\n\n\t\t/**\n\t\t * Set of classes associated with element instance.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set}\n\t\t */\n\t\tthis._classes = new Set();\n\n\t\tif ( this._attrs.has( 'class' ) ) {\n\t\t\t// Remove class attribute and handle it by class set.\n\t\t\tconst classString = this._attrs.get( 'class' );\n\t\t\tparseClasses( this._classes, classString );\n\t\t\tthis._attrs.delete( 'class' );\n\t\t}\n\n\t\t/**\n\t\t * Map of styles.\n\t\t *\n\t\t * @protected\n\t\t * @member {Set} module:engine/view/element~Element#_styles\n\t\t */\n\t\tthis._styles = new Map();\n\n\t\tif ( this._attrs.has( 'style' ) ) {\n\t\t\t// Remove style attribute and handle it by styles map.\n\t\t\tparseInlineStyles( this._styles, this._attrs.get( 'style' ) );\n\t\t\tthis._attrs.delete( 'style' );\n\t\t}\n\n\t\t/**\n\t\t * Map of custom properties.\n\t\t * Custom properties can be added to element instance, will be cloned but not rendered into DOM.\n\t\t *\n\t\t * @protected\n\t\t * @memeber {Map}\n\t\t */\n\t\tthis._customProperties = new Map();\n\t}\n\n\t/**\n\t * Number of element's children.\n\t *\n\t * @readonly\n\t * @type {Number}\n\t */\n\tget childCount() {\n\t\treturn this._children.length;\n\t}\n\n\t/**\n\t * Is `true` if there are no nodes inside this element, `false` otherwise.\n\t *\n\t * @readonly\n\t * @type {Boolean}\n\t */\n\tget isEmpty() {\n\t\treturn this._children.length === 0;\n\t}\n\n\t/**\n\t * Checks whether given view tree object is of given type.\n\t *\n\t * Read more in {@link module:engine/view/node~Node#is}.\n\t *\n\t * @param {String} type\n\t * @param {String} [name] Element name.\n\t * @returns {Boolean}\n\t */\n\tis( type, name = null ) {\n\t\tif ( !name ) {\n\t\t\treturn type == 'element' || type == this.name;\n\t\t} else {\n\t\t\treturn type == 'element' && name == this.name;\n\t\t}\n\t}\n\n\t/**\n\t * Clones provided element.\n\t *\n\t * @param {Boolean} [deep=false] If set to `true` clones element and all its children recursively. When set to `false`,\n\t * element will be cloned without any children.\n\t * @returns {module:engine/view/element~Element} Clone of this element.\n\t */\n\tclone( deep = false ) {\n\t\tconst childrenClone = [];\n\n\t\tif ( deep ) {\n\t\t\tfor ( const child of this.getChildren() ) {\n\t\t\t\tchildrenClone.push( child.clone( deep ) );\n\t\t\t}\n\t\t}\n\n\t\t// ContainerElement and AttributeElement should be also cloned properly.\n\t\tconst cloned = new this.constructor( this.name, this._attrs, childrenClone );\n\n\t\t// Classes and styles are cloned separately - this solution is faster than adding them back to attributes and\n\t\t// parse once again in constructor.\n\t\tcloned._classes = new Set( this._classes );\n\t\tcloned._styles = new Map( this._styles );\n\n\t\t// Clone custom properties.\n\t\tcloned._customProperties = new Map( this._customProperties );\n\n\t\t// Clone filler offset method.\n\t\t// We can't define this method in a prototype because it's behavior which\n\t\t// is changed by e.g. toWidget() function from ckeditor5-widget. Perhaps this should be one of custom props.\n\t\tcloned.getFillerOffset = this.getFillerOffset;\n\n\t\treturn cloned;\n\t}\n\n\t/**\n\t * {@link module:engine/view/element~Element#insertChildren Insert} a child node or a list of child nodes at the end of this node\n\t * and sets the parent of these nodes to this element.\n\t *\n\t * @fires module:engine/view/node~Node#change\n\t * @param {module:engine/view/node~Node|Iterable.} nodes Node or the list of nodes to be inserted.\n\t * @returns {Number} Number of appended nodes.\n\t */\n\tappendChildren( nodes ) {\n\t\treturn this.insertChildren( this.childCount, nodes );\n\t}\n\n\t/**\n\t * Gets child at the given index.\n\t *\n\t * @param {Number} index Index of child.\n\t * @returns {module:engine/view/node~Node} Child node.\n\t */\n\tgetChild( index ) {\n\t\treturn this._children[ index ];\n\t}\n\n\t/**\n\t * Gets index of the given child node. Returns `-1` if child node is not found.\n\t *\n\t * @param {module:engine/view/node~Node} node Child node.\n\t * @returns {Number} Index of the child node.\n\t */\n\tgetChildIndex( node ) {\n\t\treturn this._children.indexOf( node );\n\t}\n\n\t/**\n\t * Gets child nodes iterator.\n\t *\n\t * @returns {Iterable.} Child nodes iterator.\n\t */\n\tgetChildren() {\n\t\treturn this._children[ Symbol.iterator ]();\n\t}\n\n\t/**\n\t * Returns an iterator that contains the keys for attributes. Order of inserting attributes is not preserved.\n\t *\n\t * @returns {Iterator.} Keys for attributes.\n\t */\n\t* getAttributeKeys() {\n\t\tif ( this._classes.size > 0 ) {\n\t\t\tyield 'class';\n\t\t}\n\n\t\tif ( this._styles.size > 0 ) {\n\t\t\tyield 'style';\n\t\t}\n\n\t\t// This is not an optimal solution because of https://github.com/ckeditor/ckeditor5-engine/issues/454.\n\t\t// It can be simplified to `yield* this._attrs.keys();`.\n\t\tfor ( const key of this._attrs.keys() ) {\n\t\t\tyield key;\n\t\t}\n\t}\n\n\t/**\n\t * Returns iterator that iterates over this element's attributes.\n\t *\n\t * Attributes are returned as arrays containing two items. First one is attribute key and second is attribute value.\n\t * This format is accepted by native `Map` object and also can be passed in `Node` constructor.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t* getAttributes() {\n\t\tyield* this._attrs.entries();\n\n\t\tif ( this._classes.size > 0 ) {\n\t\t\tyield [ 'class', this.getAttribute( 'class' ) ];\n\t\t}\n\n\t\tif ( this._styles.size > 0 ) {\n\t\t\tyield [ 'style', this.getAttribute( 'style' ) ];\n\t\t}\n\t}\n\n\t/**\n\t * Gets attribute by key. If attribute is not present - returns undefined.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {String|undefined} Attribute value.\n\t */\n\tgetAttribute( key ) {\n\t\tif ( key == 'class' ) {\n\t\t\tif ( this._classes.size > 0 ) {\n\t\t\t\treturn [ ...this._classes ].join( ' ' );\n\t\t\t}\n\n\t\t\treturn undefined;\n\t\t}\n\n\t\tif ( key == 'style' ) {\n\t\t\tif ( this._styles.size > 0 ) {\n\t\t\t\tlet styleString = '';\n\n\t\t\t\tfor ( const [ property, value ] of this._styles ) {\n\t\t\t\t\tstyleString += `${ property }:${ value };`;\n\t\t\t\t}\n\n\t\t\t\treturn styleString;\n\t\t\t}\n\n\t\t\treturn undefined;\n\t\t}\n\n\t\treturn this._attrs.get( key );\n\t}\n\n\t/**\n\t * Returns a boolean indicating whether an attribute with the specified key exists in the element.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {Boolean} `true` if attribute with the specified key exists in the element, false otherwise.\n\t */\n\thasAttribute( key ) {\n\t\tif ( key == 'class' ) {\n\t\t\treturn this._classes.size > 0;\n\t\t}\n\n\t\tif ( key == 'style' ) {\n\t\t\treturn this._styles.size > 0;\n\t\t}\n\n\t\treturn this._attrs.has( key );\n\t}\n\n\t/**\n\t * Adds or overwrite attribute with a specified key and value.\n\t *\n\t * @param {String} key Attribute key.\n\t * @param {String} value Attribute value.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\tsetAttribute( key, value ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tif ( key == 'class' ) {\n\t\t\tparseClasses( this._classes, value );\n\t\t} else if ( key == 'style' ) {\n\t\t\tparseInlineStyles( this._styles, value );\n\t\t} else {\n\t\t\tthis._attrs.set( key, value );\n\t\t}\n\t}\n\n\t/**\n\t * Inserts a child node or a list of child nodes on the given index and sets the parent of these nodes to\n\t * this element.\n\t *\n\t * @param {Number} index Position where nodes should be inserted.\n\t * @param {module:engine/view/node~Node|Iterable.} nodes Node or the list of nodes to be inserted.\n\t * @fires module:engine/view/node~Node#change\n\t * @returns {Number} Number of inserted nodes.\n\t */\n\tinsertChildren( index, nodes ) {\n\t\tthis._fireChange( 'children', this );\n\t\tlet count = 0;\n\n\t\tnodes = normalize( nodes );\n\n\t\tfor ( const node of nodes ) {\n\t\t\t// If node that is being added to this element is already inside another element, first remove it from the old parent.\n\t\t\tif ( node.parent !== null ) {\n\t\t\t\tnode.remove();\n\t\t\t}\n\n\t\t\tnode.parent = this;\n\n\t\t\tthis._children.splice( index, 0, node );\n\t\t\tindex++;\n\t\t\tcount++;\n\t\t}\n\n\t\treturn count;\n\t}\n\n\t/**\n\t * Removes attribute from the element.\n\t *\n\t * @param {String} key Attribute key.\n\t * @returns {Boolean} Returns true if an attribute existed and has been removed.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\tremoveAttribute( key ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\t// Remove class attribute.\n\t\tif ( key == 'class' ) {\n\t\t\tif ( this._classes.size > 0 ) {\n\t\t\t\tthis._classes.clear();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\treturn false;\n\t\t}\n\n\t\t// Remove style attribute.\n\t\tif ( key == 'style' ) {\n\t\t\tif ( this._styles.size > 0 ) {\n\t\t\t\tthis._styles.clear();\n\n\t\t\t\treturn true;\n\t\t\t}\n\n\t\t\treturn false;\n\t\t}\n\n\t\t// Remove other attributes.\n\t\treturn this._attrs.delete( key );\n\t}\n\n\t/**\n\t * Removes number of child nodes starting at the given index and set the parent of these nodes to `null`.\n\t *\n\t * @param {Number} index Number of the first node to remove.\n\t * @param {Number} [howMany=1] Number of nodes to remove.\n\t * @returns {Array.} The array of removed nodes.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\tremoveChildren( index, howMany = 1 ) {\n\t\tthis._fireChange( 'children', this );\n\n\t\tfor ( let i = index; i < index + howMany; i++ ) {\n\t\t\tthis._children[ i ].parent = null;\n\t\t}\n\n\t\treturn this._children.splice( index, howMany );\n\t}\n\n\t/**\n\t * Checks if this element is similar to other element.\n\t * Both elements should have the same name and attributes to be considered as similar. Two similar elements\n\t * can contain different set of children nodes.\n\t *\n\t * @param {module:engine/view/element~Element} otherElement\n\t * @returns {Boolean}\n\t */\n\tisSimilar( otherElement ) {\n\t\tif ( !( otherElement instanceof Element ) ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// If exactly the same Element is provided - return true immediately.\n\t\tif ( this === otherElement ) {\n\t\t\treturn true;\n\t\t}\n\n\t\t// Check element name.\n\t\tif ( this.name != otherElement.name ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check number of attributes, classes and styles.\n\t\tif ( this._attrs.size !== otherElement._attrs.size || this._classes.size !== otherElement._classes.size ||\n\t\t\tthis._styles.size !== otherElement._styles.size ) {\n\t\t\treturn false;\n\t\t}\n\n\t\t// Check if attributes are the same.\n\t\tfor ( const [ key, value ] of this._attrs ) {\n\t\t\tif ( !otherElement._attrs.has( key ) || otherElement._attrs.get( key ) !== value ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if classes are the same.\n\t\tfor ( const className of this._classes ) {\n\t\t\tif ( !otherElement._classes.has( className ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\t// Check if styles are the same.\n\t\tfor ( const [ property, value ] of this._styles ) {\n\t\t\tif ( !otherElement._styles.has( property ) || otherElement._styles.get( property ) !== value ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Adds specified class.\n\t *\n\t *\t\telement.addClass( 'foo' ); // Adds 'foo' class.\n\t *\t\telement.addClass( 'foo', 'bar' ); // Adds 'foo' and 'bar' classes.\n\t *\n\t * @param {...String} className\n\t * @fires module:engine/view/node~Node#change\n\t */\n\taddClass( ...className ) {\n\t\tthis._fireChange( 'attributes', this );\n\t\tclassName.forEach( name => this._classes.add( name ) );\n\t}\n\n\t/**\n\t * Removes specified class.\n\t *\n \t *\t\telement.removeClass( 'foo' ); // Removes 'foo' class.\n\t *\t\telement.removeClass( 'foo', 'bar' ); // Removes both 'foo' and 'bar' classes.\n\t *\n\t * @param {...String} className\n\t * @fires module:engine/view/node~Node#change\n\t */\n\tremoveClass( ...className ) {\n\t\tthis._fireChange( 'attributes', this );\n\t\tclassName.forEach( name => this._classes.delete( name ) );\n\t}\n\n\t/**\n\t * Returns true if class is present.\n\t * If more then one class is provided - returns true only when all classes are present.\n\t *\n\t *\t\telement.hasClass( 'foo' ); // Returns true if 'foo' class is present.\n\t *\t\telement.hasClass( 'foo', 'bar' ); // Returns true if 'foo' and 'bar' classes are both present.\n\t *\n\t * @param {...String} className\n\t */\n\thasClass( ...className ) {\n\t\tfor ( const name of className ) {\n\t\t\tif ( !this._classes.has( name ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Returns iterator that contains all class names.\n\t *\n\t * @returns {Iterator.}\n\t */\n\tgetClassNames() {\n\t\treturn this._classes.keys();\n\t}\n\n\t/**\n\t * Adds style to the element.\n\t *\n\t *\t\telement.setStyle( 'color', 'red' );\n\t *\t\telement.setStyle( {\n\t *\t\t\tcolor: 'red',\n\t *\t\t\tposition: 'fixed'\n\t *\t\t} );\n\t *\n\t * @param {String|Object} property Property name or object with key - value pairs.\n\t * @param {String} [value] Value to set. This parameter is ignored if object is provided as the first parameter.\n\t * @fires module:engine/view/node~Node#change\n\t */\n\tsetStyle( property, value ) {\n\t\tthis._fireChange( 'attributes', this );\n\n\t\tif ( isPlainObject( property ) ) {\n\t\t\tconst keys = Object.keys( property );\n\n\t\t\tfor ( const key of keys ) {\n\t\t\t\tthis._styles.set( key, property[ key ] );\n\t\t\t}\n\t\t} else {\n\t\t\tthis._styles.set( property, value );\n\t\t}\n\t}\n\n\t/**\n\t * Returns style value for given property.\n\t * Undefined is returned if style does not exist.\n\t *\n\t * @param {String} property\n\t * @returns {String|undefined}\n\t */\n\tgetStyle( property ) {\n\t\treturn this._styles.get( property );\n\t}\n\n\t/**\n\t * Returns iterator that contains all style names.\n\t *\n\t * @returns {Iterator.}\n\t */\n\tgetStyleNames() {\n\t\treturn this._styles.keys();\n\t}\n\n\t/**\n\t * Returns true if style keys are present.\n\t * If more then one style property is provided - returns true only when all properties are present.\n\t *\n\t *\t\telement.hasStyle( 'color' ); // Returns true if 'border-top' style is present.\n\t *\t\telement.hasStyle( 'color', 'border-top' ); // Returns true if 'color' and 'border-top' styles are both present.\n\t *\n\t * @param {...String} property\n\t */\n\thasStyle( ...property ) {\n\t\tfor ( const name of property ) {\n\t\t\tif ( !this._styles.has( name ) ) {\n\t\t\t\treturn false;\n\t\t\t}\n\t\t}\n\n\t\treturn true;\n\t}\n\n\t/**\n\t * Removes specified style.\n\t *\n\t *\t\telement.removeStyle( 'color' ); // Removes 'color' style.\n\t *\t\telement.removeStyle( 'color', 'border-top' ); // Removes both 'color' and 'border-top' styles.\n\t *\n\t * @param {...String} property\n\t * @fires module:engine/view/node~Node#change\n\t */\n\tremoveStyle( ...property ) {\n\t\tthis._fireChange( 'attributes', this );\n\t\tproperty.forEach( name => this._styles.delete( name ) );\n\t}\n\n\t/**\n\t * Returns ancestor element that match specified pattern.\n\t * Provided patterns should be compatible with {@link module:engine/view/matcher~Matcher Matcher} as it is used internally.\n\t *\n\t * @see module:engine/view/matcher~Matcher\n\t * @param {Object|String|RegExp|Function} patterns Patterns used to match correct ancestor.\n\t * See {@link module:engine/view/matcher~Matcher}.\n\t * @returns {module:engine/view/element~Element|null} Found element or `null` if no matching ancestor was found.\n\t */\n\tfindAncestor( ...patterns ) {\n\t\tconst matcher = new Matcher( ...patterns );\n\t\tlet parent = this.parent;\n\n\t\twhile ( parent ) {\n\t\t\tif ( matcher.match( parent ) ) {\n\t\t\t\treturn parent;\n\t\t\t}\n\n\t\t\tparent = parent.parent;\n\t\t}\n\n\t\treturn null;\n\t}\n\n\t/**\n\t * Sets a custom property. Unlike attributes, custom properties are not rendered to the DOM,\n\t * so they can be used to add special data to elements.\n\t *\n\t * @param {String|Symbol} key\n\t * @param {*} value\n\t */\n\tsetCustomProperty( key, value ) {\n\t\tthis._customProperties.set( key, value );\n\t}\n\n\t/**\n\t * Returns the custom property value for the given key.\n\t *\n\t * @param {String|Symbol} key\n\t * @returns {*}\n\t */\n\tgetCustomProperty( key ) {\n\t\treturn this._customProperties.get( key );\n\t}\n\n\t/**\n\t * Removes the custom property stored under the given key.\n\t *\n\t * @param {String|Symbol} key\n\t * @returns {Boolean} Returns true if property was removed.\n\t */\n\tremoveCustomProperty( key ) {\n\t\treturn this._customProperties.delete( key );\n\t}\n\n\t/**\n\t * Returns an iterator which iterates over this element's custom properties.\n\t * Iterator provides [key, value] pair for each stored property.\n\t *\n\t * @returns {Iterable.<*>}\n\t */\n\t* getCustomProperties() {\n\t\tyield* this._customProperties.entries();\n\t}\n\n\t/**\n\t * Returns identity string based on element's name, styles, classes and other attributes.\n\t * Two elements that {@link #isSimilar are similar} will have same identity string.\n\t * It has the following format:\n\t *\n\t *\t\t'name class=\"class1,class2\" style=\"style1:value1;style2:value2\" attr1=\"val1\" attr2=\"val2\"'\n \t *\n\t * For example:\n\t *\n\t *\t\tconst element = new ViewElement( 'foo' );\n\t *\t\telement.setAttribute( 'banana', '10' );\n\t *\t\telement.setAttribute( 'apple', '20' );\n\t *\t\telement.setStyle( 'color', 'red' );\n\t *\t\telement.setStyle( 'border-color', 'white' );\n\t *\t\telement.addClass( 'baz' );\n\t *\n\t *\t\t// returns 'foo class=\"baz\" style=\"border-color:white;color:red\" apple=\"20\" banana=\"10\"'\n\t *\t\telement.getIdentity();\n\t *\n\t * NOTE: Classes, styles and other attributes are sorted alphabetically.\n\t *\n\t * @returns {String}\n\t */\n\tgetIdentity() {\n\t\tconst classes = Array.from( this._classes ).sort().join( ',' );\n\t\tconst styles = Array.from( this._styles ).map( i => `${ i[ 0 ] }:${ i[ 1 ] }` ).sort().join( ';' );\n\t\tconst attributes = Array.from( this._attrs ).map( i => `${ i[ 0 ] }=\"${ i[ 1 ] }\"` ).sort().join( ' ' );\n\n\t\treturn this.name +\n\t\t\t( classes == '' ? '' : ` class=\"${ classes }\"` ) +\n\t\t\t( styles == '' ? '' : ` style=\"${ styles }\"` ) +\n\t\t\t( attributes == '' ? '' : ` ${ attributes }` );\n\t}\n\n\t/**\n\t * Returns block {@link module:engine/view/filler filler} offset or `null` if block filler is not needed.\n\t *\n\t * @abstract\n\t * @method module:engine/view/element~Element#getFillerOffset\n\t */\n}\n\n// Parses inline styles and puts property - value pairs into styles map.\n// Styles map is cleared before insertion.\n//\n// @param {Map.} stylesMap Map to insert parsed properties and values.\n// @param {String} stylesString Styles to parse.\nfunction parseInlineStyles( stylesMap, stylesString ) {\n\t// `null` if no quote was found in input string or last found quote was a closing quote. See below.\n\tlet quoteType = null;\n\tlet propertyNameStart = 0;\n\tlet propertyValueStart = 0;\n\tlet propertyName = null;\n\n\tstylesMap.clear();\n\n\t// Do not set anything if input string is empty.\n\tif ( stylesString === '' ) {\n\t\treturn;\n\t}\n\n\t// Fix inline styles that do not end with `;` so they are compatible with algorithm below.\n\tif ( stylesString.charAt( stylesString.length - 1 ) != ';' ) {\n\t\tstylesString = stylesString + ';';\n\t}\n\n\t// Seek the whole string for \"special characters\".\n\tfor ( let i = 0; i < stylesString.length; i++ ) {\n\t\tconst char = stylesString.charAt( i );\n\n\t\tif ( quoteType === null ) {\n\t\t\t// No quote found yet or last found quote was a closing quote.\n\t\t\tswitch ( char ) {\n\t\t\t\tcase ':':\n\t\t\t\t\t// Most of time colon means that property name just ended.\n\t\t\t\t\t// Sometimes however `:` is found inside property value (for example in background image url).\n\t\t\t\t\tif ( !propertyName ) {\n\t\t\t\t\t\t// Treat this as end of property only if property name is not already saved.\n\t\t\t\t\t\t// Save property name.\n\t\t\t\t\t\tpropertyName = stylesString.substr( propertyNameStart, i - propertyNameStart );\n\t\t\t\t\t\t// Save this point as the start of property value.\n\t\t\t\t\t\tpropertyValueStart = i + 1;\n\t\t\t\t\t}\n\n\t\t\t\t\tbreak;\n\n\t\t\t\tcase '\"':\n\t\t\t\tcase '\\'':\n\t\t\t\t\t// Opening quote found (this is an opening quote, because `quoteType` is `null`).\n\t\t\t\t\tquoteType = char;\n\n\t\t\t\t\tbreak;\n\n\t\t\t\t// eslint-disable-next-line no-case-declarations\n\t\t\t\tcase ';':\n\t\t\t\t\t// Property value just ended.\n\t\t\t\t\t// Use previously stored property value start to obtain property value.\n\t\t\t\t\tconst propertyValue = stylesString.substr( propertyValueStart, i - propertyValueStart );\n\n\t\t\t\t\tif ( propertyName ) {\n\t\t\t\t\t\t// Save parsed part.\n\t\t\t\t\t\tstylesMap.set( propertyName.trim(), propertyValue.trim() );\n\t\t\t\t\t}\n\n\t\t\t\t\tpropertyName = null;\n\n\t\t\t\t\t// Save this point as property name start. Property name starts immediately after previous property value ends.\n\t\t\t\t\tpropertyNameStart = i + 1;\n\n\t\t\t\t\tbreak;\n\t\t\t}\n\t\t} else if ( char === quoteType ) {\n\t\t\t// If a quote char is found and it is a closing quote, mark this fact by `null`-ing `quoteType`.\n\t\t\tquoteType = null;\n\t\t}\n\t}\n}\n\n// Parses class attribute and puts all classes into classes set.\n// Classes set s cleared before insertion.\n//\n// @param {Set.} classesSet Set to insert parsed classes.\n// @param {String} classesString String with classes to parse.\nfunction parseClasses( classesSet, classesString ) {\n\tconst classArray = classesString.split( /\\s+/ );\n\tclassesSet.clear();\n\tclassArray.forEach( name => classesSet.add( name ) );\n}\n\n// Converts strings to Text and non-iterables to arrays.\n//\n// @param {String|module:engine/view/node~Node|Iterable.}\n// @return {Iterable.}\nfunction normalize( nodes ) {\n\t// Separate condition because string is iterable.\n\tif ( typeof nodes == 'string' ) {\n\t\treturn [ new Text( nodes ) ];\n\t}\n\n\tif ( !isIterable( nodes ) ) {\n\t\tnodes = [ nodes ];\n\t}\n\n\t// Array.from to enable .map() on non-arrays.\n\treturn Array.from( nodes )\n\t\t.map( node => {\n\t\t\treturn typeof node == 'string' ? new Text( node ) : node;\n\t\t} );\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/view/element.js\n// module id = 27\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * Set of utils related to keyboard support.\n *\n * @module utils/keyboard\n */\n\nimport CKEditorError from './ckeditorerror';\nimport env from './env';\n\n/**\n * Object with `keyName => keyCode` pairs for a set of known keys.\n *\n * Contains:\n *\n * * `a-z`,\n * * `0-9`,\n * * `f1-f12`,\n * * `arrow(left|up|right|bottom)`,\n * * `backspace`, `delete`, `enter`, `esc`, `tab`,\n * * `ctrl`, `cmd`, `shift`, `alt`.\n */\nexport const keyCodes = generateKnownKeyCodes();\n\n/**\n * Converts a key name or a {@link module:utils/keyboard~KeystrokeInfo keystroke info} into a key code.\n *\n * Note: Key names are matched with {@link module:utils/keyboard~keyCodes} in a case-insensitive way.\n *\n * @param {String|module:utils/keyboard~KeystrokeInfo} Key name (see {@link module:utils/keyboard~keyCodes})\n * or a keystroke data object.\n * @returns {Number} Key or keystroke code.\n */\nexport function getCode( key ) {\n\tlet keyCode;\n\n\tif ( typeof key == 'string' ) {\n\t\tkeyCode = keyCodes[ key.toLowerCase() ];\n\n\t\tif ( !keyCode ) {\n\t\t\t/**\n\t\t\t * Unknown key name. Only key names contained by the {@link module:utils/keyboard~keyCodes} can be used.\n\t\t\t *\n\t\t\t * @errror keyboard-unknown-key\n\t\t\t * @param {String} key\n\t\t\t */\n\t\t\tthrow new CKEditorError( 'keyboard-unknown-key: Unknown key name.', { key } );\n\t\t}\n\t} else {\n\t\tkeyCode = key.keyCode +\n\t\t\t( key.altKey ? keyCodes.alt : 0 ) +\n\t\t\t( key.ctrlKey ? keyCodes.ctrl : 0 ) +\n\t\t\t( key.shiftKey ? keyCodes.shift : 0 );\n\t}\n\n\treturn keyCode;\n}\n\n/**\n * Parses keystroke and returns a keystroke code that will match the code returned by\n * link {@link module:utils/keyboard.getCode} for a corresponding {@link module:utils/keyboard~KeystrokeInfo keystroke info}.\n *\n * The keystroke can be passed in two formats:\n *\n * * as a single string – e.g. `ctrl + A`,\n * * as an array of {@link module:utils/keyboard~keyCodes known key names} and key codes – e.g.:\n * * `[ 'ctrl', 32 ]` (ctrl + space),\n * * `[ 'ctrl', 'a' ]` (ctrl + A).\n *\n * Note: Key names are matched with {@link module:utils/keyboard~keyCodes} in a case-insensitive way.\n *\n * Note: Only keystrokes with a single non-modifier key are supported (e.g. `ctrl+A` is OK, but `ctrl+A+B` is not).\n *\n * @param {String|Array.} keystroke Keystroke definition.\n * @returns {Number} Keystroke code.\n */\nexport function parseKeystroke( keystroke ) {\n\tif ( typeof keystroke == 'string' ) {\n\t\tkeystroke = splitKeystrokeText( keystroke );\n\t}\n\n\treturn keystroke\n\t\t.map( key => ( typeof key == 'string' ) ? getCode( key ) : key )\n\t\t.reduce( ( key, sum ) => sum + key, 0 );\n}\n\n/**\n * It translates any keystroke string text like `\"CTRL+A\"` to an\n * environment–specific keystroke, i.e. `\"⌘A\"` on Mac OSX.\n *\n * @param {String} keystroke Keystroke text.\n * @returns {String} Keystroke text specific for the environment.\n */\nexport function getEnvKeystrokeText( keystroke ) {\n\tconst split = splitKeystrokeText( keystroke );\n\n\tif ( env.mac ) {\n\t\tif ( split[ 0 ].toLowerCase() == 'ctrl' ) {\n\t\t\treturn '⌘' + ( split[ 1 ] || '' );\n\t\t}\n\t}\n\n\treturn keystroke;\n}\n\nfunction generateKnownKeyCodes() {\n\tconst keyCodes = {\n\t\tarrowleft: 37,\n\t\tarrowup: 38,\n\t\tarrowright: 39,\n\t\tarrowdown: 40,\n\t\tbackspace: 8,\n\t\tdelete: 46,\n\t\tenter: 13,\n\t\tspace: 32,\n\t\tesc: 27,\n\t\ttab: 9,\n\n\t\t// The idea about these numbers is that they do not collide with any real key codes, so we can use them\n\t\t// like bit masks.\n\t\tctrl: 0x110000,\n\t\t// Has the same code as ctrl, because their behaviour should be unified across the editor.\n\t\t// See http://ckeditor.github.io/editor-recommendations/general-policies#ctrl-vs-cmd\n\t\tcmd: 0x110000,\n\t\tshift: 0x220000,\n\t\talt: 0x440000\n\t};\n\n\t// a-z\n\tfor ( let code = 65; code <= 90; code++ ) {\n\t\tconst letter = String.fromCharCode( code );\n\n\t\tkeyCodes[ letter.toLowerCase() ] = code;\n\t}\n\n\t// 0-9\n\tfor ( let code = 48; code <= 57; code++ ) {\n\t\tkeyCodes[ code - 48 ] = code;\n\t}\n\n\t// F1-F12\n\tfor ( let code = 112; code <= 123; code++ ) {\n\t\tkeyCodes[ 'f' + ( code - 111 ) ] = code;\n\t}\n\n\treturn keyCodes;\n}\n\nfunction splitKeystrokeText( keystroke ) {\n\treturn keystroke.split( /\\s*\\+\\s*/ );\n}\n\n/**\n * Information about a keystroke.\n *\n * @interface module:utils/keyboard~KeystrokeInfo\n */\n\n/**\n * The [key code](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode).\n *\n * @member {Number} module:utils/keyboard~KeystrokeInfo#keyCode\n */\n\n/**\n * Whether the Alt modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#altKey\n */\n\n/**\n * Whether the Ctrl or Cmd modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#ctrlKey\n */\n\n/**\n * Whether the Shift modifier was pressed.\n *\n * @member {Bolean} module:utils/keyboard~KeystrokeInfo#shiftKey\n */\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/keyboard.js\n// module id = 28\n// module chunks = 0","/**\n * @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.\n * For licensing, see LICENSE.md.\n */\n\n/**\n * @module engine/model/operation/moveoperation\n */\n\nimport Operation from './operation';\nimport Position from '../position';\nimport Range from '../range';\nimport CKEditorError from '@ckeditor/ckeditor5-utils/src/ckeditorerror';\nimport compareArrays from '@ckeditor/ckeditor5-utils/src/comparearrays';\nimport writer from './../writer';\n\n/**\n * Operation to move a range of {@link module:engine/model/item~Item model items}\n * to given {@link module:engine/model/position~Position target position}.\n *\n * @extends module:engine/model/operation/operation~Operation\n */\nexport default class MoveOperation extends Operation {\n\t/**\n\t * Creates a move operation.\n\t *\n\t * @param {module:engine/model/position~Position} sourcePosition\n\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t * @param {Number} howMany Offset size of moved range. Moved range will start from `sourcePosition` and end at\n\t * `sourcePosition` with offset shifted by `howMany`.\n\t * @param {module:engine/model/position~Position} targetPosition Position at which moved nodes will be inserted.\n\t * @param {Number} baseVersion {@link module:engine/model/document~Document#version} on which operation can be applied.\n\t */\n\tconstructor( sourcePosition, howMany, targetPosition, baseVersion ) {\n\t\tsuper( baseVersion );\n\n\t\t/**\n\t\t * Position before the first {@link module:engine/model/item~Item model item} to move.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/moveoperation~MoveOperation#sourcePosition\n\t\t */\n\t\tthis.sourcePosition = Position.createFromPosition( sourcePosition );\n\n\t\t/**\n\t\t * Offset size of moved range.\n\t\t *\n\t\t * @member {Number} module:engine/model/operation/moveoperation~MoveOperation#howMany\n\t\t */\n\t\tthis.howMany = howMany;\n\n\t\t/**\n\t\t * Position at which moved nodes will be inserted.\n\t\t *\n\t\t * @member {module:engine/model/position~Position} module:engine/model/operation/moveoperation~MoveOperation#targetPosition\n\t\t */\n\t\tthis.targetPosition = Position.createFromPosition( targetPosition );\n\n\t\t/**\n\t\t * Defines whether `MoveOperation` is sticky. If `MoveOperation` is sticky, during\n\t\t * {@link module:engine/model/operation/transform~transform operational transformation} if there will be an operation that\n\t\t * inserts some nodes at the position equal to the boundary of this `MoveOperation`, that operation will\n\t\t * get their insertion path updated to the position where this `MoveOperation` moves the range.\n\t\t *\n\t\t * @member {Boolean} module:engine/model/operation/moveoperation~MoveOperation#isSticky\n\t\t */\n\t\tthis.isSticky = false;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tget type() {\n\t\treturn 'move';\n\t}\n\n\t/**\n\t * Creates and returns an operation that has the same parameters as this operation.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation} Clone of this operation.\n\t */\n\tclone() {\n\t\tconst op = new this.constructor( this.sourcePosition, this.howMany, this.targetPosition, this.baseVersion );\n\t\top.isSticky = this.isSticky;\n\n\t\treturn op;\n\t}\n\n\t/**\n\t * Returns the start position of the moved range after it got moved. This may be different than\n\t * {@link module:engine/model/operation/moveoperation~MoveOperation#targetPosition} in some cases, i.e. when a range is moved\n\t * inside the same parent but {@link module:engine/model/operation/moveoperation~MoveOperation#targetPosition targetPosition}\n\t * is after {@link module:engine/model/operation/moveoperation~MoveOperation#sourcePosition sourcePosition}.\n\t *\n\t *\t\t vv vv\n\t *\t\tabcdefg ===> adefbcg\n\t *\t\t ^ ^\n\t *\t\t targetPos\tmovedRangeStart\n\t *\t\t offset 6\toffset 4\n\t *\n\t * @returns {module:engine/model/position~Position}\n\t */\n\tgetMovedRangeStart() {\n\t\treturn this.targetPosition._getTransformedByDeletion( this.sourcePosition, this.howMany );\n\t}\n\n\t/**\n\t * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.\n\t *\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tgetReversed() {\n\t\tconst newTargetPosition = this.sourcePosition._getTransformedByInsertion( this.targetPosition, this.howMany );\n\n\t\tconst op = new this.constructor( this.getMovedRangeStart(), this.howMany, newTargetPosition, this.baseVersion + 1 );\n\t\top.isSticky = this.isSticky;\n\n\t\treturn op;\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\t_execute() {\n\t\tconst sourceElement = this.sourcePosition.parent;\n\t\tconst targetElement = this.targetPosition.parent;\n\t\tconst sourceOffset = this.sourcePosition.offset;\n\t\tconst targetOffset = this.targetPosition.offset;\n\n\t\t// Validate whether move operation has correct parameters.\n\t\t// Validation is pretty complex but move operation is one of the core ways to manipulate the document state.\n\t\t// We expect that many errors might be connected with one of scenarios described below.\n\t\tif ( !sourceElement || !targetElement ) {\n\t\t\t/**\n\t\t\t * Source position or target position is invalid.\n\t\t\t *\n\t\t\t * @error move-operation-position-invalid\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-position-invalid: Source position or target position is invalid.'\n\t\t\t);\n\t\t} else if ( sourceOffset + this.howMany > sourceElement.maxOffset ) {\n\t\t\t/**\n\t\t\t * The nodes which should be moved do not exist.\n\t\t\t *\n\t\t\t * @error move-operation-nodes-do-not-exist\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-nodes-do-not-exist: The nodes which should be moved do not exist.'\n\t\t\t);\n\t\t} else if ( sourceElement === targetElement && sourceOffset < targetOffset && targetOffset < sourceOffset + this.howMany ) {\n\t\t\t/**\n\t\t\t * Trying to move a range of nodes into the middle of that range.\n\t\t\t *\n\t\t\t * @error move-operation-range-into-itself\n\t\t\t */\n\t\t\tthrow new CKEditorError(\n\t\t\t\t'move-operation-range-into-itself: Trying to move a range of nodes to the inside of that range.'\n\t\t\t);\n\t\t} else if ( this.sourcePosition.root == this.targetPosition.root ) {\n\t\t\tif ( compareArrays( this.sourcePosition.getParentPath(), this.targetPosition.getParentPath() ) == 'prefix' ) {\n\t\t\t\tconst i = this.sourcePosition.path.length - 1;\n\n\t\t\t\tif ( this.targetPosition.path[ i ] >= sourceOffset && this.targetPosition.path[ i ] < sourceOffset + this.howMany ) {\n\t\t\t\t\t/**\n\t\t\t\t\t * Trying to move a range of nodes into one of nodes from that range.\n\t\t\t\t\t *\n\t\t\t\t\t * @error move-operation-node-into-itself\n\t\t\t\t\t */\n\t\t\t\t\tthrow new CKEditorError(\n\t\t\t\t\t\t'move-operation-node-into-itself: Trying to move a range of nodes into one of nodes from that range.'\n\t\t\t\t\t);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\n\t\tconst range = writer.move( Range.createFromPositionAndShift( this.sourcePosition, this.howMany ), this.targetPosition );\n\n\t\treturn {\n\t\t\tsourcePosition: this.sourcePosition,\n\t\t\trange\n\t\t};\n\t}\n\n\t/**\n\t * @inheritDoc\n\t */\n\tstatic get className() {\n\t\treturn 'engine.model.operation.MoveOperation';\n\t}\n\n\t/**\n\t * Creates `MoveOperation` object from deserilized object, i.e. from parsed JSON string.\n\t *\n\t * @param {Object} json Deserialized JSON object.\n\t * @param {module:engine/model/document~Document} document Document on which this operation will be applied.\n\t * @returns {module:engine/model/operation/moveoperation~MoveOperation}\n\t */\n\tstatic fromJSON( json, document ) {\n\t\tconst sourcePosition = Position.fromJSON( json.sourcePosition, document );\n\t\tconst targetPosition = Position.fromJSON( json.targetPosition, document );\n\n\t\tconst move = new this( sourcePosition, json.howMany, targetPosition, json.baseVersion );\n\n\t\tif ( json.isSticky ) {\n\t\t\tmove.isSticky = true;\n\t\t}\n\n\t\treturn move;\n\t}\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-engine/src/model/operation/moveoperation.js\n// module id = 29\n// module chunks = 0","/**\n * A specialized version of `_.map` for arrays without support for iteratee\n * shorthands.\n *\n * @private\n * @param {Array} array The array to iterate over.\n * @param {Function} iteratee The function invoked per iteration.\n * @returns {Array} Returns the new mapped array.\n */\nfunction arrayMap(array, iteratee) {\n var index = -1,\n length = array.length,\n result = Array(length);\n\n while (++index < length) {\n result[index] = iteratee(array[index], index, array);\n }\n return result;\n}\n\nexport default arrayMap;\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// ../ckeditor5-utils/src/lib/lodash/_arrayMap.js\n// module id = 30\n// module chunks = 0","/*\n\tMIT License http://www.opensource.org/licenses/mit-license.php\n\tAuthor Tobias Koppers @sokra\n*/\n// css base code, injected by the css-loader\nmodule.exports = function(useSourceMap) {\n\tvar list = [];\n\n\t// return the list of modules as css string\n\tlist.toString = function toString() {\n\t\treturn this.map(function (item) {\n\t\t\tvar content = cssWithMappingToString(item, useSourceMap);\n\t\t\tif(item[2]) {\n\t\t\t\treturn \"@media \" + item[2] + \"{\" + content + \"}\";\n\t\t\t} else {\n\t\t\t\treturn content;\n\t\t\t}\n\t\t}).join(\"\");\n\t};\n\n\t// import a list of modules into the list\n\tlist.i = function(modules, mediaQuery) {\n\t\tif(typeof modules === \"string\")\n\t\t\tmodules = [[null, modules, \"\"]];\n\t\tvar alreadyImportedModules = {};\n\t\tfor(var i = 0; i < this.length; i++) {\n\t\t\tvar id = this[i][0];\n\t\t\tif(typeof id === \"number\")\n\t\t\t\talreadyImportedModules[id] = true;\n\t\t}\n\t\tfor(i = 0; i < modules.length; i++) {\n\t\t\tvar item = modules[i];\n\t\t\t// skip already imported module\n\t\t\t// this implementation is not 100% perfect for weird media query combinations\n\t\t\t// when a module is imported multiple times with different media queries.\n\t\t\t// I hope this will never occur (Hey this way we have smaller bundles)\n\t\t\tif(typeof item[0] !== \"number\" || !alreadyImportedModules[item[0]]) {\n\t\t\t\tif(mediaQuery && !item[2]) {\n\t\t\t\t\titem[2] = mediaQuery;\n\t\t\t\t} else if(mediaQuery) {\n\t\t\t\t\titem[2] = \"(\" + item[2] + \") and (\" + mediaQuery + \")\";\n\t\t\t\t}\n\t\t\t\tlist.push(item);\n\t\t\t}\n\t\t}\n\t};\n\treturn list;\n};\n\nfunction cssWithMappingToString(item, useSourceMap) {\n\tvar content = item[1] || '';\n\tvar cssMapping = item[3];\n\tif (!cssMapping) {\n\t\treturn content;\n\t}\n\n\tif (useSourceMap && typeof btoa === 'function') {\n\t\tvar sourceMapping = toComment(cssMapping);\n\t\tvar sourceURLs = cssMapping.sources.map(function (source) {\n\t\t\treturn '/*# sourceURL=' + cssMapping.sourceRoot + source + ' */'\n\t\t});\n\n\t\treturn [content].concat(sourceURLs).concat([sourceMapping]).join('\\n');\n\t}\n\n\treturn [content].join('\\n');\n}\n\n// Adapted from convert-source-map (MIT)\nfunction toComment(sourceMap) {\n\t// eslint-disable-next-line no-undef\n\tvar base64 = btoa(unescape(encodeURIComponent(JSON.stringify(sourceMap))));\n\tvar data = 'sourceMappingURL=data:application/json;charset=utf-8;base64,' + base64;\n\n\treturn '/*# ' + data + ' */';\n}\n\n\n\n//////////////////\n// WEBPACK FOOTER\n// /workspace/ckeditor5/node_modules/css-loader/lib/css-base.js\n// module id = 31\n// module chunks = 0","/*\n\tMIT License http://www.opensource.org/licenses/mit-license.php\n\tAuthor Tobias Koppers @sokra\n*/\n\nvar stylesInDom = {};\n\nvar\tmemoize = function (fn) {\n\tvar memo;\n\n\treturn function () {\n\t\tif (typeof memo === \"undefined\") memo = fn.apply(this, arguments);\n\t\treturn memo;\n\t};\n};\n\nvar isOldIE = memoize(function () {\n\t// Test for IE <= 9 as proposed by Browserhacks\n\t// @see http://browserhacks.com/#hack-e71d8692f65334173fee715c222cb805\n\t// Tests for existence of standard globals is to allow style-loader\n\t// to operate correctly into non-standard environments\n\t// @see https://github.com/webpack-contrib/style-loader/issues/177\n\treturn window && document && document.all && !window.atob;\n});\n\nvar getElement = (function (fn) {\n\tvar memo = {};\n\n\treturn function(selector) {\n\t\tif (typeof memo[selector] === \"undefined\") {\n\t\t\tmemo[selector] = fn.call(this, selector);\n\t\t}\n\n\t\treturn memo[selector]\n\t};\n})(function (target) {\n\treturn document.querySelector(target)\n});\n\nvar singleton = null;\nvar\tsingletonCounter = 0;\nvar\tstylesInsertedAtTop = [];\n\nvar\tfixUrls = require(\"./urls\");\n\nmodule.exports = function(list, options) {\n\tif (typeof DEBUG !== \"undefined\" && DEBUG) {\n\t\tif (typeof document !== \"object\") throw new Error(\"The style-loader cannot be used in a non-browser environment\");\n\t}\n\n\toptions = options || {};\n\n\toptions.attrs = typeof options.attrs === \"object\" ? options.attrs : {};\n\n\t// Force single-tag solution on IE6-9, which has a hard limit on the # of