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feat($compile): multiple transclusion via named slots
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@petebacondarwin
petebacondarwin committed Oct 2, 2015
1 parent 049d3de commit e0abcdb
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Showing 3 changed files with 421 additions and 10 deletions.
69 changes: 66 additions & 3 deletions src/ng/compile.js
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Original file line number Diff line number Diff line change
Expand Up @@ -1472,7 +1472,7 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {

function createBoundTranscludeFn(scope, transcludeFn, previousBoundTranscludeFn) {

var boundTranscludeFn = function(transcludedScope, cloneFn, controllers, futureParentElement, containingScope) {
var boundTranscludeFn = function boundTranscludeFn(transcludedScope, cloneFn, controllers, futureParentElement, containingScope) {

if (!transcludedScope) {
transcludedScope = scope.$new(false, containingScope);
Expand All @@ -1486,6 +1486,13 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
});
};

// We need to attach the transclusion slots onto the boundTranscludeFn
// so that they are available for directives such as `ngTransclude`
var boundSlots = boundTranscludeFn.$$slots = createMap();
for (var slotName in transcludeFn.$$slots) {
boundSlots[slotName] = createBoundTranscludeFn(scope, transcludeFn.$$slots[slotName], previousBoundTranscludeFn);
}

return boundTranscludeFn;
}

Expand Down Expand Up @@ -1826,6 +1833,52 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
// on the same element more than once.
nonTlbTranscludeDirective: nonTlbTranscludeDirective
});
} else if (isObject(directiveValue)) {

// We have multiple transclusion zones - match them and collect them up into slots
$template = [];
var slots = createMap();
var slotNames = createMap();
var filledSlots = createMap();

// Parse the slot names: if they start with a ? then they are optional
forEach(directiveValue, function(slotName, key) {
var optional = (slotName.charAt(0) === '?');
slotName = optional ? slotName.substring(1) : slotName;
slotNames[key] = slotName;
slots[slotName] = [];
// filledSlots will contain true for all slots that are either
// optional or have been filled
filledSlots[slotName] = optional;
});


forEach($compileNode.children(), function(node) {
var slotName = slotNames[directiveNormalize(nodeName_(node))];
var slot = $template;
if (slotName) {
filledSlots[slotName] = true;
slots[slotName].push(node);
} else {
$template.push(node);
}
});

// Check for required slots that were not filled
forEach(filledSlots, function(filled, slotName) {
if (!filled) {
throw $compileMinErr('reqslot', 'Required transclusion slot `{0}` was not filled.', slotName);
}
});

// Compile each slot into a transclusion function and attach them to the default transclusion function
childTranscludeFn = compilationGenerator(mightHaveMultipleTransclusionError, $template, transcludeFn);
forEach(Object.keys(slots), function(slotName) {
slots[slotName] = compilationGenerator(mightHaveMultipleTransclusionError, slots[slotName], transcludeFn);
});
childTranscludeFn.$$slots = slots;
$compileNode.empty(); // clear contents

} else {
$template = jqLite(jqLiteClone(compileNode)).contents();
$compileNode.empty(); // clear contents
Expand Down Expand Up @@ -2134,11 +2187,11 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {

// This is the function that is injected as `$transclude`.
// Note: all arguments are optional!
function controllersBoundTransclude(scope, cloneAttachFn, futureParentElement) {
function controllersBoundTransclude(scope, cloneAttachFn, futureParentElement, slotName) {
var transcludeControllers;

// No scope passed in:
if (!isScope(scope)) {
slotName = futureParentElement;
futureParentElement = cloneAttachFn;
cloneAttachFn = scope;
scope = undefined;
Expand All @@ -2150,6 +2203,16 @@ function $CompileProvider($provide, $$sanitizeUriProvider) {
if (!futureParentElement) {
futureParentElement = hasElementTranscludeDirective ? $element.parent() : $element;
}
if (slotName) {
var slotTranscludeFn = boundTranscludeFn.$$slots[slotName];
if (!slotTranscludeFn) {
throw $compileMinErr('noslot',
'No parent directive that requires a transclusion with slot name "{0}". ' +
'Element: {1}',
slotName, startingTag($element));
}
return slotTranscludeFn(scope, cloneAttachFn, transcludeControllers, futureParentElement, scopeToChild);
}
return boundTranscludeFn(scope, cloneAttachFn, transcludeControllers, futureParentElement, scopeToChild);
}
}
Expand Down
73 changes: 66 additions & 7 deletions src/ng/directive/ngTransclude.js
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Original file line number Diff line number Diff line change
Expand Up @@ -8,12 +8,20 @@
* @description
* Directive that marks the insertion point for the transcluded DOM of the nearest parent directive that uses transclusion.
*
* You can specify that you want to insert a named transclusion slot, instead of the default slot, by providing the slot name
* as the value of the `ng-transclude` or `ng-transclude-slot` attribute.
*
* Any existing content of the element that this directive is placed on will be removed before the transcluded content is inserted.
*
* @element ANY
*
* @param {string} ngTransclude|ngTranscludeSlot the name of the slot to insert at this point. If this is not provided or empty then
* the default slot is used.
*
* @example
<example module="transcludeExample">
* ### Default transclusion
* This example demonstrates simple transclusion.
<example name="simpleTranscludeExample" module="transcludeExample">
<file name="index.html">
<script>
angular.module('transcludeExample', [])
Expand Down Expand Up @@ -53,21 +61,72 @@
</file>
</example>
*
*/
* @example
* ### Multi-slot transclusion
<example name="multiSlotTranscludeExample" module="multiSlotTranscludeExample">
<file name="index.html">
<div ng-controller="ExampleController">
<input ng-model="title" aria-label="title"> <br/>
<textarea ng-model="text" aria-label="text"></textarea> <br/>
<pane>
<pane-title><a ng-href="{{link}}">{{title}}</a></pane-title>
<pane-body><p>{{text}}</p></pane-body>
</pane>
</div>
</file>
<file name="app.js">
angular.module('multiSlotTranscludeExample', [])
.directive('pane', function(){
return {
restrict: 'E',
transclude: {
'paneTitle': '?title',
'paneBody': 'body'
},
template: '<div style="border: 1px solid black;">' +
'<div ng-transclude="title" style="background-color: gray"></div>' +
'<div ng-transclude="body"></div>' +
'</div>'
};
})
.controller('ExampleController', ['$scope', function($scope) {
$scope.title = 'Lorem Ipsum';
$scope.link = "https://google.com";
$scope.text = 'Neque porro quisquam est qui dolorem ipsum quia dolor...';
}]);
</file>
<file name="protractor.js" type="protractor">
it('should have transcluded the title and the body', function() {
var titleElement = element(by.model('title'));
titleElement.clear();
titleElement.sendKeys('TITLE');
var textElement = element(by.model('text'));
textElement.clear();
textElement.sendKeys('TEXT');
expect(element(by.binding('title')).getText()).toEqual('TITLE');
expect(element(by.binding('text')).getText()).toEqual('TEXT');
});
</file>
</example> */
var ngTranscludeMinErr = minErr('ngTransclude');
var ngTranscludeDirective = ngDirective({
restrict: 'EAC',
link: function($scope, $element, $attrs, controller, $transclude) {

function ngTranscludeCloneAttachFn(clone) {
$element.empty();
$element.append(clone);
}

if (!$transclude) {
throw minErr('ngTransclude')('orphan',
throw ngTranscludeMinErr('orphan',
'Illegal use of ngTransclude directive in the template! ' +
'No parent directive that requires a transclusion found. ' +
'Element: {0}',
startingTag($element));
}

$transclude(function(clone) {
$element.empty();
$element.append(clone);
});
$transclude(ngTranscludeCloneAttachFn, null, $attrs.ngTransclude || $attrs.ngTranscludeSlot);
}
});

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