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fix($animate): use a scheduled timeout in favor of a fallback propert…
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…y to close transitions

With ngAnimate, CSS transitions, that are not properlty triggered, are forceably closed off
by appling a fallback property. The fallback property approach works, however, its styling
itself may effect CSS inheritance or cause the element to render improperly. Therefore, its
best to stick to using a scheduled timeout to run sometime after the highest animation time
has passed.

Closes angular#5255
Closes angular#5241
Closes angular#5405
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@matsko @jamesdaily
matsko authored and jamesdaily committed Jan 27, 2014
1 parent 039c548 commit 8b0b35b
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Showing 3 changed files with 128 additions and 171 deletions.
11 changes: 0 additions & 11 deletions css/angular.css
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Original file line number Diff line number Diff line change
Expand Up @@ -9,14 +9,3 @@
ng\:form {
display: block;
}

/* The styles below ensure that the CSS transition will ALWAYS
* animate and close. A nasty bug occurs with CSS transitions where
* when the active class isn't set, or if the active class doesn't
* contain any styles to transition to, then, if ngAnimate is used,
* it will appear as if the webpage is broken due to the forever hanging
* animations. The border-spacing (!ie) and zoom (ie) CSS properties are
* used below since they trigger a transition without making the browser
* animate anything and they're both highly underused CSS properties */
.ng-animate-start { border-spacing:1px 1px; -ms-zoom:1.0001; }
.ng-animate-active { border-spacing:0px 0px; -ms-zoom:1; }
110 changes: 76 additions & 34 deletions src/ngAnimate/animate.js
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Original file line number Diff line number Diff line change
Expand Up @@ -881,27 +881,73 @@ angular.module('ngAnimate', ['ng'])
var ANIMATION_ITERATION_COUNT_KEY = 'IterationCount';
var NG_ANIMATE_PARENT_KEY = '$$ngAnimateKey';
var NG_ANIMATE_CSS_DATA_KEY = '$$ngAnimateCSS3Data';
var NG_ANIMATE_FALLBACK_CLASS_NAME = 'ng-animate-start';
var NG_ANIMATE_FALLBACK_ACTIVE_CLASS_NAME = 'ng-animate-active';
var ELAPSED_TIME_MAX_DECIMAL_PLACES = 3;
var CLOSING_TIME_BUFFER = 1.5;
var ONE_SECOND = 1000;

var animationCounter = 0;
var lookupCache = {};
var parentCounter = 0;
var animationReflowQueue = [];
var animationElementQueue = [];
var animationTimer;
var closingAnimationTime = 0;
var timeOut = false;
function afterReflow(element, callback) {
$timeout.cancel(animationTimer);

var animationReflowQueue = [], animationTimer, timeOut = false;
function afterReflow(callback) {
animationReflowQueue.push(callback);
$timeout.cancel(animationTimer);

var node = extractElementNode(element);
element = angular.element(node);
animationElementQueue.push(element);

var elementData = element.data(NG_ANIMATE_CSS_DATA_KEY);
closingAnimationTime = Math.max(closingAnimationTime,
(elementData.maxDelay + elementData.maxDuration) * CLOSING_TIME_BUFFER * ONE_SECOND);

//by placing a counter we can avoid an accidental
//race condition which may close an animation when
//a follow-up animation is midway in its animation
elementData.animationCount = animationCounter;

animationTimer = $timeout(function() {
forEach(animationReflowQueue, function(fn) {
fn();
});

//copy the list of elements so that successive
//animations won't conflict if they're added before
//the closing animation timeout has run
var elementQueueSnapshot = [];
var animationCounterSnapshot = animationCounter;
forEach(animationElementQueue, function(elm) {
elementQueueSnapshot.push(elm);
});

$timeout(function() {
closeAllAnimations(elementQueueSnapshot, animationCounterSnapshot);
elementQueueSnapshot = null;
}, closingAnimationTime, false);

animationReflowQueue = [];
animationElementQueue = [];
animationTimer = null;
lookupCache = {};
closingAnimationTime = 0;
animationCounter++;
}, 10, false);
}

function closeAllAnimations(elements, count) {
forEach(elements, function(element) {
var elementData = element.data(NG_ANIMATE_CSS_DATA_KEY);
if(elementData && elementData.animationCount == count) {
(elementData.closeAnimationFn || noop)();
}
});
}

function getElementAnimationDetails(element, cacheKey) {
var data = cacheKey ? lookupCache[cacheKey] : null;
if(!data) {
Expand Down Expand Up @@ -1007,6 +1053,7 @@ angular.module('ngAnimate', ['ng'])
timeout is empty (this would cause a flicker bug normally
in the page. There is also no point in performing an animation
that only has a delay and no duration */
var maxDelay = Math.max(timings.transitionDelay, timings.animationDelay);
var maxDuration = Math.max(timings.transitionDuration, timings.animationDuration);
if(maxDuration === 0) {
element.removeClass(className);
Expand All @@ -1016,13 +1063,9 @@ angular.module('ngAnimate', ['ng'])
//temporarily disable the transition so that the enter styles
//don't animate twice (this is here to avoid a bug in Chrome/FF).
var activeClassName = '';
if(timings.transitionDuration > 0) {
element.addClass(NG_ANIMATE_FALLBACK_CLASS_NAME);
activeClassName += NG_ANIMATE_FALLBACK_ACTIVE_CLASS_NAME + ' ';
blockTransitions(element);
} else {
timings.transitionDuration > 0 ?
blockTransitions(element) :
blockKeyframeAnimations(element);
}

forEach(className.split(' '), function(klass, i) {
activeClassName += (i > 0 ? ' ' : '') + klass + '-active';
Expand All @@ -1032,6 +1075,7 @@ angular.module('ngAnimate', ['ng'])
className : className,
activeClassName : activeClassName,
maxDuration : maxDuration,
maxDelay : maxDelay,
classes : className + ' ' + activeClassName,
timings : timings,
stagger : stagger,
Expand Down Expand Up @@ -1066,30 +1110,28 @@ angular.module('ngAnimate', ['ng'])
}

function animateRun(element, className, activeAnimationComplete) {
var data = element.data(NG_ANIMATE_CSS_DATA_KEY);
var elementData = element.data(NG_ANIMATE_CSS_DATA_KEY);
var node = extractElementNode(element);
if(node.className.indexOf(className) == -1 || !data) {
if(node.className.indexOf(className) == -1 || !elementData) {
activeAnimationComplete();
return;
}

var timings = data.timings;
var stagger = data.stagger;
var maxDuration = data.maxDuration;
var activeClassName = data.activeClassName;
var maxDelayTime = Math.max(timings.transitionDelay, timings.animationDelay) * 1000;
var timings = elementData.timings;
var stagger = elementData.stagger;
var maxDuration = elementData.maxDuration;
var activeClassName = elementData.activeClassName;
var maxDelayTime = Math.max(timings.transitionDelay, timings.animationDelay) * ONE_SECOND;
var startTime = Date.now();
var css3AnimationEvents = ANIMATIONEND_EVENT + ' ' + TRANSITIONEND_EVENT;
var ii = data.ii;
var ii = elementData.ii;

var applyFallbackStyle, style = '', appliedStyles = [];
var style = '', appliedStyles = [];
if(timings.transitionDuration > 0) {
var propertyStyle = timings.transitionPropertyStyle;
if(propertyStyle.indexOf('all') == -1) {
applyFallbackStyle = true;
var fallbackProperty = $sniffer.msie ? '-ms-zoom' : 'border-spacing';
style += CSS_PREFIX + 'transition-property: ' + propertyStyle + ', ' + fallbackProperty + '; ';
style += CSS_PREFIX + 'transition-duration: ' + timings.transitionDurationStyle + ', ' + timings.transitionDuration + 's; ';
style += CSS_PREFIX + 'transition-property: ' + propertyStyle + ';';
style += CSS_PREFIX + 'transition-duration: ' + timings.transitionDurationStyle + 's;';
appliedStyles.push(CSS_PREFIX + 'transition-property');
appliedStyles.push(CSS_PREFIX + 'transition-duration');
}
Expand All @@ -1098,10 +1140,6 @@ angular.module('ngAnimate', ['ng'])
if(ii > 0) {
if(stagger.transitionDelay > 0 && stagger.transitionDuration === 0) {
var delayStyle = timings.transitionDelayStyle;
if(applyFallbackStyle) {
delayStyle += ', ' + timings.transitionDelay + 's';
}

style += CSS_PREFIX + 'transition-delay: ' +
prepareStaggerDelay(delayStyle, stagger.transitionDelay, ii) + '; ';
appliedStyles.push(CSS_PREFIX + 'transition-delay');
Expand All @@ -1124,19 +1162,24 @@ angular.module('ngAnimate', ['ng'])

element.on(css3AnimationEvents, onAnimationProgress);
element.addClass(activeClassName);
elementData.closeAnimationFn = function() {
onEnd();
activeAnimationComplete();
};
return onEnd;

// This will automatically be called by $animate so
// there is no need to attach this internally to the
// timeout done method.
return function onEnd(cancelled) {
function onEnd(cancelled) {
element.off(css3AnimationEvents, onAnimationProgress);
element.removeClass(activeClassName);
animateClose(element, className);
var node = extractElementNode(element);
for (var i in appliedStyles) {
node.style.removeProperty(appliedStyles[i]);
}
};
}

function onAnimationProgress(event) {
event.stopPropagation();
Expand Down Expand Up @@ -1202,7 +1245,7 @@ angular.module('ngAnimate', ['ng'])
//data from the element which will not make the 2nd animation
//happen in the first place
var cancel = preReflowCancellation;
afterReflow(function() {
afterReflow(element, function() {
unblockTransitions(element);
unblockKeyframeAnimations(element);
//once the reflow is complete then we point cancel to
Expand All @@ -1218,7 +1261,6 @@ angular.module('ngAnimate', ['ng'])

function animateClose(element, className) {
element.removeClass(className);
element.removeClass(NG_ANIMATE_FALLBACK_CLASS_NAME);
element.removeData(NG_ANIMATE_CSS_DATA_KEY);
}

Expand Down Expand Up @@ -1268,7 +1310,7 @@ angular.module('ngAnimate', ['ng'])
beforeAddClass : function(element, className, animationCompleted) {
var cancellationMethod = animateBefore(element, suffixClasses(className, '-add'));
if(cancellationMethod) {
afterReflow(function() {
afterReflow(element, function() {
unblockTransitions(element);
unblockKeyframeAnimations(element);
animationCompleted();
Expand All @@ -1285,7 +1327,7 @@ angular.module('ngAnimate', ['ng'])
beforeRemoveClass : function(element, className, animationCompleted) {
var cancellationMethod = animateBefore(element, suffixClasses(className, '-remove'));
if(cancellationMethod) {
afterReflow(function() {
afterReflow(element, function() {
unblockTransitions(element);
unblockKeyframeAnimations(element);
animationCompleted();
Expand Down
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