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79f6403b7a
This implements my proposal in http://lists.w3.org/Archives/Public/www-style/2011Apr/0381.html and http://lists.w3.org/Archives/Public/www-style/2011Apr/0387.html . I think it was a serious mistake to implement what the spec says, and I'm fixing that mistake so that we have a chance to change the spec. In other words, when an @keyframes rule has two key selectors at the same time, the later one no longer overrides the entirety of the earlier one. The overriding is done for each property that's in the later rule. (And the -moz-animation-timing-function is taken only from the keyframe actually used for the given property; if there's no declaration there then the computed value of the property is used.) The test for @keyframes cascade fails without the patch; the test for @keyframes cascade2 tests behavior that works both before and after the patch.
958 lines
34 KiB
C++
958 lines
34 KiB
C++
/* vim: set shiftwidth=2 tabstop=8 autoindent cindent expandtab: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is nsAnimationManager, an implementation of part
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* of css3-animations.
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*
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* The Initial Developer of the Original Code is the Mozilla Foundation.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* L. David Baron <dbaron@dbaron.org>, Mozilla Corporation (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsAnimationManager.h"
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#include "nsPresContext.h"
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#include "nsRuleProcessorData.h"
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#include "nsStyleSet.h"
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#include "nsCSSRules.h"
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#include "nsStyleAnimation.h"
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#include "nsSMILKeySpline.h"
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#include "nsEventDispatcher.h"
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using namespace mozilla;
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struct AnimationPropertySegment
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{
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float mFromKey, mToKey;
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nsStyleAnimation::Value mFromValue, mToValue;
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css::ComputedTimingFunction mTimingFunction;
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};
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struct AnimationProperty
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{
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nsCSSProperty mProperty;
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InfallibleTArray<AnimationPropertySegment> mSegments;
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};
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/**
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* Data about one animation (i.e., one of the values of
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* 'animation-name') running on an element.
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*/
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struct ElementAnimation
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{
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ElementAnimation()
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: mLastNotification(LAST_NOTIFICATION_NONE)
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{
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}
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nsString mName; // empty string for 'none'
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float mIterationCount; // NS_IEEEPositiveInfinity() means infinite
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PRUint8 mDirection;
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PRUint8 mFillMode;
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PRUint8 mPlayState;
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bool FillsForwards() const {
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return mFillMode == NS_STYLE_ANIMATION_FILL_MODE_BOTH ||
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mFillMode == NS_STYLE_ANIMATION_FILL_MODE_FORWARDS;
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}
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bool FillsBackwards() const {
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return mFillMode == NS_STYLE_ANIMATION_FILL_MODE_BOTH ||
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mFillMode == NS_STYLE_ANIMATION_FILL_MODE_BACKWARDS;
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}
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bool IsPaused() const {
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return mPlayState == NS_STYLE_ANIMATION_PLAY_STATE_PAUSED;
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}
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TimeStamp mStartTime; // with delay taken into account
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TimeStamp mPauseStart;
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TimeDuration mIterationDuration;
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enum {
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LAST_NOTIFICATION_NONE = PRUint32(-1),
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LAST_NOTIFICATION_END = PRUint32(-2)
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};
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// One of the above constants, or an integer for the iteration
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// whose start we last notified on.
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PRUint32 mLastNotification;
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InfallibleTArray<AnimationProperty> mProperties;
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};
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typedef nsAnimationManager::EventArray EventArray;
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typedef nsAnimationManager::AnimationEventInfo AnimationEventInfo;
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/**
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* Data about all of the animations running on an element.
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*/
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struct ElementAnimations : public mozilla::css::CommonElementAnimationData
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{
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ElementAnimations(dom::Element *aElement, nsIAtom *aElementProperty,
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nsAnimationManager *aAnimationManager)
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: CommonElementAnimationData(aElement, aElementProperty,
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aAnimationManager),
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mNeedsRefreshes(true)
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{
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}
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void EnsureStyleRuleFor(TimeStamp aRefreshTime,
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EventArray &aEventsToDispatch);
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bool IsForElement() const { // rather than for a pseudo-element
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return mElementProperty == nsGkAtoms::animationsProperty;
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}
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void PostRestyleForAnimation(nsPresContext *aPresContext) {
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nsRestyleHint hint = IsForElement() ? eRestyle_Self : eRestyle_Subtree;
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aPresContext->PresShell()->RestyleForAnimation(mElement, hint);
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}
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// This style rule contains the style data for currently animating
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// values. It only matches when styling with animation. When we
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// style without animation, we need to not use it so that we can
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// detect any new changes; if necessary we restyle immediately
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// afterwards with animation.
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// NOTE: If we don't need to apply any styles, mStyleRule will be
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// null, but mStyleRuleRefreshTime will still be valid.
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nsRefPtr<css::AnimValuesStyleRule> mStyleRule;
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// The refresh time associated with mStyleRule.
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TimeStamp mStyleRuleRefreshTime;
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// False when we know that our current style rule is valid
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// indefinitely into the future (because all of our animations are
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// either completed or paused). May be invalidated by a style change.
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bool mNeedsRefreshes;
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InfallibleTArray<ElementAnimation> mAnimations;
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};
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static void
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ElementAnimationsPropertyDtor(void *aObject,
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nsIAtom *aPropertyName,
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void *aPropertyValue,
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void *aData)
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{
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ElementAnimations *ea = static_cast<ElementAnimations*>(aPropertyValue);
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#ifdef DEBUG
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NS_ABORT_IF_FALSE(!ea->mCalledPropertyDtor, "can't call dtor twice");
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ea->mCalledPropertyDtor = true;
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#endif
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delete ea;
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}
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void
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ElementAnimations::EnsureStyleRuleFor(TimeStamp aRefreshTime,
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EventArray& aEventsToDispatch)
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{
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if (!mNeedsRefreshes) {
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// All of our animations are paused or completed.
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mStyleRuleRefreshTime = aRefreshTime;
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return;
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}
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// mStyleRule may be null and valid, if we have no style to apply.
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if (mStyleRuleRefreshTime.IsNull() ||
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mStyleRuleRefreshTime != aRefreshTime) {
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mStyleRuleRefreshTime = aRefreshTime;
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mStyleRule = nsnull;
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// We'll set mNeedsRefreshes to true below in all cases where we need them.
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mNeedsRefreshes = false;
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// FIXME(spec): assume that properties in higher animations override
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// those in lower ones.
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// Therefore, we iterate from last animation to first.
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nsCSSPropertySet properties;
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for (PRUint32 animIdx = mAnimations.Length(); animIdx-- != 0; ) {
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ElementAnimation &anim = mAnimations[animIdx];
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if (anim.mProperties.Length() == 0 ||
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anim.mIterationDuration.ToMilliseconds() <= 0.0) {
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// No animation data.
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continue;
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}
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TimeDuration currentTimeDuration;
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if (anim.IsPaused()) {
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// FIXME: avoid recalculating every time
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currentTimeDuration = anim.mPauseStart - anim.mStartTime;
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} else {
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currentTimeDuration = aRefreshTime - anim.mStartTime;
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}
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// Set |currentIterationCount| to the (fractional) number of
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// iterations we've completed up to the current position.
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double currentIterationCount =
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currentTimeDuration / anim.mIterationDuration;
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bool dispatchStartOrIteration = false;
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if (currentIterationCount >= double(anim.mIterationCount)) {
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// Dispatch 'animationend' when needed.
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if (IsForElement() &&
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anim.mLastNotification !=
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ElementAnimation::LAST_NOTIFICATION_END) {
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anim.mLastNotification = ElementAnimation::LAST_NOTIFICATION_END;
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AnimationEventInfo ei(mElement, anim.mName, NS_ANIMATION_END,
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currentTimeDuration);
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aEventsToDispatch.AppendElement(ei);
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}
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if (!anim.FillsForwards()) {
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// No animation data.
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continue;
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}
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currentIterationCount = double(anim.mIterationCount);
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} else {
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if (!anim.IsPaused()) {
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mNeedsRefreshes = true;
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}
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if (currentIterationCount < 0.0) {
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if (!anim.FillsBackwards()) {
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// No animation data.
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continue;
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}
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currentIterationCount = 0.0;
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} else {
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dispatchStartOrIteration = !anim.IsPaused();
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}
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}
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// Set |positionInIteration| to the position from 0% to 100% along
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// the keyframes.
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NS_ABORT_IF_FALSE(currentIterationCount >= 0.0, "must be positive");
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PRUint32 whichIteration = int(currentIterationCount);
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if (whichIteration == anim.mIterationCount) {
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// When the animation's iteration count is an integer (as it
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// normally is), we need to end at 100% of its last iteration
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// rather than 0% of the next one.
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--whichIteration;
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}
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double positionInIteration =
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currentIterationCount - double(whichIteration);
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if (anim.mDirection == NS_STYLE_ANIMATION_DIRECTION_ALTERNATE &&
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(whichIteration & 1) == 1) {
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positionInIteration = 1.0 - positionInIteration;
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}
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// Dispatch 'animationstart' or 'animationiteration' when needed.
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if (IsForElement() && dispatchStartOrIteration &&
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whichIteration != anim.mLastNotification) {
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// Notify 'animationstart' even if a negative delay puts us
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// past the first iteration.
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// Note that when somebody changes the animation-duration
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// dynamically, this will fire an extra iteration event
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// immediately in many cases. It's not clear to me if that's the
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// right thing to do.
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PRUint32 message =
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anim.mLastNotification == ElementAnimation::LAST_NOTIFICATION_NONE
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? NS_ANIMATION_START : NS_ANIMATION_ITERATION;
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anim.mLastNotification = whichIteration;
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AnimationEventInfo ei(mElement, anim.mName, message,
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currentTimeDuration);
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aEventsToDispatch.AppendElement(ei);
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}
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NS_ABORT_IF_FALSE(0.0 <= positionInIteration &&
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positionInIteration <= 1.0,
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"position should be in [0-1]");
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for (PRUint32 propIdx = 0, propEnd = anim.mProperties.Length();
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propIdx != propEnd; ++propIdx)
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{
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const AnimationProperty &prop = anim.mProperties[propIdx];
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NS_ABORT_IF_FALSE(prop.mSegments[0].mFromKey == 0.0,
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"incorrect first from key");
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NS_ABORT_IF_FALSE(prop.mSegments[prop.mSegments.Length() - 1].mToKey
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== 1.0,
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"incorrect last to key");
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if (properties.HasProperty(prop.mProperty)) {
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// A later animation already set this property.
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continue;
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}
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properties.AddProperty(prop.mProperty);
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NS_ABORT_IF_FALSE(prop.mSegments.Length() > 0,
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"property should not be in animations if it "
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"has no segments");
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// FIXME: Maybe cache the current segment?
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const AnimationPropertySegment *segment = prop.mSegments.Elements();
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while (segment->mToKey < positionInIteration) {
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NS_ABORT_IF_FALSE(segment->mFromKey < segment->mToKey,
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"incorrect keys");
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++segment;
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NS_ABORT_IF_FALSE(segment->mFromKey == (segment-1)->mToKey,
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"incorrect keys");
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}
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NS_ABORT_IF_FALSE(segment->mFromKey < segment->mToKey,
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"incorrect keys");
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NS_ABORT_IF_FALSE(segment - prop.mSegments.Elements() <
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prop.mSegments.Length(),
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"ran off end");
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if (!mStyleRule) {
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// Allocate the style rule now that we know we have animation data.
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mStyleRule = new css::AnimValuesStyleRule();
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}
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double positionInSegment = (positionInIteration - segment->mFromKey) /
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(segment->mToKey - segment->mFromKey);
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double valuePosition =
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segment->mTimingFunction.GetValue(positionInSegment);
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nsStyleAnimation::Value *val =
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mStyleRule->AddEmptyValue(prop.mProperty);
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#ifdef DEBUG
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bool result =
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#endif
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nsStyleAnimation::Interpolate(prop.mProperty,
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segment->mFromValue, segment->mToValue,
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valuePosition, *val);
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NS_ABORT_IF_FALSE(result, "interpolate must succeed now");
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}
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}
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}
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}
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ElementAnimations*
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nsAnimationManager::GetElementAnimations(dom::Element *aElement,
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nsCSSPseudoElements::Type aPseudoType,
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bool aCreateIfNeeded)
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{
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if (!aCreateIfNeeded && PR_CLIST_IS_EMPTY(&mElementData)) {
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// Early return for the most common case.
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return nsnull;
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}
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nsIAtom *propName;
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if (aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement) {
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propName = nsGkAtoms::animationsProperty;
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} else if (aPseudoType == nsCSSPseudoElements::ePseudo_before) {
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propName = nsGkAtoms::animationsOfBeforeProperty;
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} else if (aPseudoType == nsCSSPseudoElements::ePseudo_after) {
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propName = nsGkAtoms::animationsOfAfterProperty;
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} else {
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NS_ASSERTION(!aCreateIfNeeded,
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"should never try to create transitions for pseudo "
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"other than :before or :after");
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return nsnull;
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}
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ElementAnimations *ea = static_cast<ElementAnimations*>(
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aElement->GetProperty(propName));
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if (!ea && aCreateIfNeeded) {
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// FIXME: Consider arena-allocating?
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ea = new ElementAnimations(aElement, propName, this);
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if (!ea) {
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NS_WARNING("out of memory");
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return nsnull;
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}
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nsresult rv = aElement->SetProperty(propName, ea,
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ElementAnimationsPropertyDtor, nsnull);
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if (NS_FAILED(rv)) {
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NS_WARNING("SetProperty failed");
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delete ea;
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return nsnull;
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}
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AddElementData(ea);
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}
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return ea;
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}
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/* virtual */ void
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nsAnimationManager::RulesMatching(ElementRuleProcessorData* aData)
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{
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NS_ABORT_IF_FALSE(aData->mPresContext == mPresContext,
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"pres context mismatch");
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nsIStyleRule *rule =
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GetAnimationRule(aData->mElement,
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nsCSSPseudoElements::ePseudo_NotPseudoElement);
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if (rule) {
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aData->mRuleWalker->Forward(rule);
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}
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}
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/* virtual */ void
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nsAnimationManager::RulesMatching(PseudoElementRuleProcessorData* aData)
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{
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NS_ABORT_IF_FALSE(aData->mPresContext == mPresContext,
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"pres context mismatch");
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if (aData->mPseudoType != nsCSSPseudoElements::ePseudo_before &&
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aData->mPseudoType != nsCSSPseudoElements::ePseudo_after) {
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return;
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}
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// FIXME: Do we really want to be the only thing keeping a
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// pseudo-element alive? I *think* the non-animation restyle should
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// handle that, but should add a test.
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nsIStyleRule *rule = GetAnimationRule(aData->mElement, aData->mPseudoType);
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if (rule) {
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aData->mRuleWalker->Forward(rule);
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}
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}
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/* virtual */ void
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nsAnimationManager::RulesMatching(AnonBoxRuleProcessorData* aData)
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{
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}
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#ifdef MOZ_XUL
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/* virtual */ void
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nsAnimationManager::RulesMatching(XULTreeRuleProcessorData* aData)
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{
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}
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#endif
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/* virtual */ size_t
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nsAnimationManager::SizeOfExcludingThis(nsMallocSizeOfFun aMallocSizeOf) const
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{
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return CommonAnimationManager::SizeOfExcludingThis(aMallocSizeOf);
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// Measurement of the following members may be added later if DMD finds it is
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// worthwhile:
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// - mKeyframesRules
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// - mPendingEvents
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}
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/* virtual */ size_t
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nsAnimationManager::SizeOfIncludingThis(nsMallocSizeOfFun aMallocSizeOf) const
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{
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return aMallocSizeOf(this) + SizeOfExcludingThis(aMallocSizeOf);
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}
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nsIStyleRule*
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nsAnimationManager::CheckAnimationRule(nsStyleContext* aStyleContext,
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mozilla::dom::Element* aElement)
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{
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if (!mPresContext->IsProcessingAnimationStyleChange()) {
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// Everything that causes our animation data to change triggers a
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// style change, which in turn triggers a non-animation restyle.
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// Likewise, when we initially construct frames, we're not in a
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// style change, but also not in an animation restyle.
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const nsStyleDisplay *disp = aStyleContext->GetStyleDisplay();
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ElementAnimations *ea =
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GetElementAnimations(aElement, aStyleContext->GetPseudoType(), false);
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if (!ea &&
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disp->mAnimations.Length() == 1 &&
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disp->mAnimations[0].GetName().IsEmpty()) {
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return nsnull;
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}
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// build the animations list
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InfallibleTArray<ElementAnimation> newAnimations;
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BuildAnimations(aStyleContext, newAnimations);
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if (newAnimations.IsEmpty()) {
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if (ea) {
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ea->Destroy();
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}
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return nsnull;
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}
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TimeStamp refreshTime = mPresContext->RefreshDriver()->MostRecentRefresh();
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if (ea) {
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// The cached style rule is invalid.
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ea->mStyleRule = nsnull;
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ea->mStyleRuleRefreshTime = TimeStamp();
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// Copy over the start times and (if still paused) pause starts
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// for each animation (matching on name only) that was also in the
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// old list of animations.
|
|
// This means that we honor dynamic changes, which isn't what the
|
|
// spec says to do, but WebKit seems to honor at least some of
|
|
// them. See
|
|
// http://lists.w3.org/Archives/Public/www-style/2011Apr/0079.html
|
|
// In order to honor what the spec said, we'd copy more data over
|
|
// (or potentially optimize BuildAnimations to avoid rebuilding it
|
|
// in the first place).
|
|
if (!ea->mAnimations.IsEmpty()) {
|
|
for (PRUint32 newIdx = 0, newEnd = newAnimations.Length();
|
|
newIdx != newEnd; ++newIdx) {
|
|
ElementAnimation *newAnim = &newAnimations[newIdx];
|
|
|
|
// Find the matching animation with this name in the old list
|
|
// of animations. Because of this code, they must all have
|
|
// the same start time, though they might differ in pause
|
|
// state. So if a page uses multiple copies of the same
|
|
// animation in one element's animation list, and gives them
|
|
// different pause states, they, well, get what they deserve.
|
|
// We'll use the last one since it's more likely to be the one
|
|
// doing something.
|
|
const ElementAnimation *oldAnim = nsnull;
|
|
for (PRUint32 oldIdx = ea->mAnimations.Length(); oldIdx-- != 0; ) {
|
|
const ElementAnimation *a = &ea->mAnimations[oldIdx];
|
|
if (a->mName == newAnim->mName) {
|
|
oldAnim = a;
|
|
break;
|
|
}
|
|
}
|
|
if (!oldAnim) {
|
|
continue;
|
|
}
|
|
|
|
newAnim->mStartTime = oldAnim->mStartTime;
|
|
newAnim->mLastNotification = oldAnim->mLastNotification;
|
|
|
|
if (oldAnim->IsPaused()) {
|
|
if (newAnim->IsPaused()) {
|
|
// Copy pause start just like start time.
|
|
newAnim->mPauseStart = oldAnim->mPauseStart;
|
|
} else {
|
|
// Handle change in pause state by adjusting start
|
|
// time to unpause.
|
|
newAnim->mStartTime += refreshTime - oldAnim->mPauseStart;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
ea = GetElementAnimations(aElement, aStyleContext->GetPseudoType(),
|
|
true);
|
|
}
|
|
ea->mAnimations.SwapElements(newAnimations);
|
|
ea->mNeedsRefreshes = true;
|
|
|
|
ea->EnsureStyleRuleFor(refreshTime, mPendingEvents);
|
|
// We don't actually dispatch the mPendingEvents now. We'll either
|
|
// dispatch them the next time we get a refresh driver notification
|
|
// or the next time somebody calls
|
|
// nsPresShell::FlushPendingNotifications.
|
|
if (!mPendingEvents.IsEmpty()) {
|
|
mPresContext->Document()->SetNeedStyleFlush();
|
|
}
|
|
}
|
|
|
|
return GetAnimationRule(aElement, aStyleContext->GetPseudoType());
|
|
}
|
|
|
|
class PercentageHashKey : public PLDHashEntryHdr
|
|
{
|
|
public:
|
|
typedef const float& KeyType;
|
|
typedef const float* KeyTypePointer;
|
|
|
|
PercentageHashKey(KeyTypePointer aKey) : mValue(*aKey) { }
|
|
PercentageHashKey(const PercentageHashKey& toCopy) : mValue(toCopy.mValue) { }
|
|
~PercentageHashKey() { }
|
|
|
|
KeyType GetKey() const { return mValue; }
|
|
bool KeyEquals(KeyTypePointer aKey) const { return *aKey == mValue; }
|
|
|
|
static KeyTypePointer KeyToPointer(KeyType aKey) { return &aKey; }
|
|
static PLDHashNumber HashKey(KeyTypePointer aKey) {
|
|
MOZ_STATIC_ASSERT(sizeof(PLDHashNumber) == sizeof(PRUint32),
|
|
"this hash function assumes PLDHashNumber is PRUint32");
|
|
MOZ_STATIC_ASSERT(PLDHashNumber(-1) > PLDHashNumber(0),
|
|
"this hash function assumes PLDHashNumber is PRUint32");
|
|
float key = *aKey;
|
|
NS_ABORT_IF_FALSE(0.0f <= key && key <= 1.0f, "out of range");
|
|
return PLDHashNumber(key * PR_UINT32_MAX);
|
|
}
|
|
enum { ALLOW_MEMMOVE = true };
|
|
|
|
private:
|
|
const float mValue;
|
|
};
|
|
|
|
struct KeyframeData {
|
|
float mKey;
|
|
PRUint32 mIndex; // store original order since sort algorithm is not stable
|
|
nsCSSKeyframeRule *mRule;
|
|
};
|
|
|
|
struct KeyframeDataComparator {
|
|
bool Equals(const KeyframeData& A, const KeyframeData& B) const {
|
|
return A.mKey == B.mKey && A.mIndex == B.mIndex;
|
|
}
|
|
bool LessThan(const KeyframeData& A, const KeyframeData& B) const {
|
|
return A.mKey < B.mKey || (A.mKey == B.mKey && A.mIndex < B.mIndex);
|
|
}
|
|
};
|
|
|
|
class ResolvedStyleCache {
|
|
public:
|
|
ResolvedStyleCache() {
|
|
mCache.Init(16); // FIXME: make infallible!
|
|
}
|
|
nsStyleContext* Get(nsPresContext *aPresContext,
|
|
nsStyleContext *aParentStyleContext,
|
|
nsCSSKeyframeRule *aKeyframe);
|
|
|
|
private:
|
|
nsRefPtrHashtable<nsPtrHashKey<nsCSSKeyframeRule>, nsStyleContext> mCache;
|
|
};
|
|
|
|
nsStyleContext*
|
|
ResolvedStyleCache::Get(nsPresContext *aPresContext,
|
|
nsStyleContext *aParentStyleContext,
|
|
nsCSSKeyframeRule *aKeyframe)
|
|
{
|
|
// FIXME (spec): The css3-animations spec isn't very clear about how
|
|
// properties are resolved when they have values that depend on other
|
|
// properties (e.g., values in 'em'). I presume that they're resolved
|
|
// relative to the other styles of the element. The question is
|
|
// whether they are resolved relative to other animations: I assume
|
|
// that they're not, since that would prevent us from caching a lot of
|
|
// data that we'd really like to cache (in particular, the
|
|
// nsStyleAnimation::Value values in AnimationPropertySegment).
|
|
nsStyleContext *result = mCache.GetWeak(aKeyframe);
|
|
if (!result) {
|
|
nsCOMArray<nsIStyleRule> rules;
|
|
rules.AppendObject(aKeyframe);
|
|
nsRefPtr<nsStyleContext> resultStrong = aPresContext->StyleSet()->
|
|
ResolveStyleByAddingRules(aParentStyleContext, rules);
|
|
mCache.Put(aKeyframe, resultStrong);
|
|
result = resultStrong;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void
|
|
nsAnimationManager::BuildAnimations(nsStyleContext* aStyleContext,
|
|
InfallibleTArray<ElementAnimation>& aAnimations)
|
|
{
|
|
NS_ABORT_IF_FALSE(aAnimations.IsEmpty(), "expect empty array");
|
|
|
|
ResolvedStyleCache resolvedStyles;
|
|
|
|
const nsStyleDisplay *disp = aStyleContext->GetStyleDisplay();
|
|
TimeStamp now = mPresContext->RefreshDriver()->MostRecentRefresh();
|
|
for (PRUint32 animIdx = 0, animEnd = disp->mAnimations.Length();
|
|
animIdx != animEnd; ++animIdx) {
|
|
const nsAnimation& aSrc = disp->mAnimations[animIdx];
|
|
ElementAnimation& aDest = *aAnimations.AppendElement();
|
|
|
|
aDest.mName = aSrc.GetName();
|
|
aDest.mIterationCount = aSrc.GetIterationCount();
|
|
aDest.mDirection = aSrc.GetDirection();
|
|
aDest.mFillMode = aSrc.GetFillMode();
|
|
aDest.mPlayState = aSrc.GetPlayState();
|
|
|
|
aDest.mStartTime = now + TimeDuration::FromMilliseconds(aSrc.GetDelay());
|
|
if (aDest.IsPaused()) {
|
|
aDest.mPauseStart = now;
|
|
} else {
|
|
aDest.mPauseStart = TimeStamp();
|
|
}
|
|
|
|
aDest.mIterationDuration = TimeDuration::FromMilliseconds(aSrc.GetDuration());
|
|
|
|
nsCSSKeyframesRule *rule = KeyframesRuleFor(aDest.mName);
|
|
if (!rule) {
|
|
// no segments
|
|
continue;
|
|
}
|
|
|
|
// While current drafts of css3-animations say that later keyframes
|
|
// with the same key entirely replace earlier ones (no cascading),
|
|
// this is a bad idea and contradictory to the rest of CSS. So
|
|
// we're going to keep all the keyframes for each key and then do
|
|
// the replacement on a per-property basis rather than a per-rule
|
|
// basis, just like everything else in CSS.
|
|
|
|
AutoInfallibleTArray<KeyframeData, 16> sortedKeyframes;
|
|
|
|
for (PRUint32 ruleIdx = 0, ruleEnd = rule->StyleRuleCount();
|
|
ruleIdx != ruleEnd; ++ruleIdx) {
|
|
css::Rule* cssRule = rule->GetStyleRuleAt(ruleIdx);
|
|
NS_ABORT_IF_FALSE(cssRule, "must have rule");
|
|
NS_ABORT_IF_FALSE(cssRule->GetType() == css::Rule::KEYFRAME_RULE,
|
|
"must be keyframe rule");
|
|
nsCSSKeyframeRule *kfRule = static_cast<nsCSSKeyframeRule*>(cssRule);
|
|
|
|
const nsTArray<float> &keys = kfRule->GetKeys();
|
|
for (PRUint32 keyIdx = 0, keyEnd = keys.Length();
|
|
keyIdx != keyEnd; ++keyIdx) {
|
|
float key = keys[keyIdx];
|
|
// FIXME (spec): The spec doesn't say what to do with
|
|
// out-of-range keyframes. We'll ignore them.
|
|
// (And PercentageHashKey currently assumes we either ignore or
|
|
// clamp them.)
|
|
if (0.0f <= key && key <= 1.0f) {
|
|
KeyframeData *data = sortedKeyframes.AppendElement();
|
|
data->mKey = key;
|
|
data->mIndex = ruleIdx;
|
|
data->mRule = kfRule;
|
|
}
|
|
}
|
|
}
|
|
|
|
sortedKeyframes.Sort(KeyframeDataComparator());
|
|
|
|
if (sortedKeyframes.Length() == 0) {
|
|
// no segments
|
|
continue;
|
|
}
|
|
|
|
// Record the properties that are present in any keyframe rules we
|
|
// are using.
|
|
nsCSSPropertySet properties;
|
|
|
|
for (PRUint32 kfIdx = 0, kfEnd = sortedKeyframes.Length();
|
|
kfIdx != kfEnd; ++kfIdx) {
|
|
css::Declaration *decl = sortedKeyframes[kfIdx].mRule->Declaration();
|
|
for (PRUint32 propIdx = 0, propEnd = decl->Count();
|
|
propIdx != propEnd; ++propIdx) {
|
|
properties.AddProperty(decl->OrderValueAt(propIdx));
|
|
}
|
|
}
|
|
|
|
for (nsCSSProperty prop = nsCSSProperty(0);
|
|
prop < eCSSProperty_COUNT_no_shorthands;
|
|
prop = nsCSSProperty(prop + 1)) {
|
|
if (!properties.HasProperty(prop) ||
|
|
nsCSSProps::kAnimTypeTable[prop] == eStyleAnimType_None) {
|
|
continue;
|
|
}
|
|
|
|
// Build a list of the keyframes to use for this property. This
|
|
// means we need every keyframe with the property in it, except
|
|
// for those keyframes where a later keyframe with the *same key*
|
|
// also has the property.
|
|
AutoInfallibleTArray<PRUint32, 16> keyframesWithProperty;
|
|
float lastKey = 100.0f; // an invalid key
|
|
for (PRUint32 kfIdx = 0, kfEnd = sortedKeyframes.Length();
|
|
kfIdx != kfEnd; ++kfIdx) {
|
|
KeyframeData &kf = sortedKeyframes[kfIdx];
|
|
if (!kf.mRule->Declaration()->HasProperty(prop)) {
|
|
continue;
|
|
}
|
|
if (kf.mKey == lastKey) {
|
|
// Replace previous occurrence of same key.
|
|
keyframesWithProperty[keyframesWithProperty.Length() - 1] = kfIdx;
|
|
} else {
|
|
keyframesWithProperty.AppendElement(kfIdx);
|
|
}
|
|
lastKey = kf.mKey;
|
|
}
|
|
|
|
AnimationProperty &propData = *aDest.mProperties.AppendElement();
|
|
propData.mProperty = prop;
|
|
|
|
KeyframeData *fromKeyframe = nsnull;
|
|
nsRefPtr<nsStyleContext> fromContext;
|
|
bool interpolated = true;
|
|
for (PRUint32 wpIdx = 0, wpEnd = keyframesWithProperty.Length();
|
|
wpIdx != wpEnd; ++wpIdx) {
|
|
PRUint32 kfIdx = keyframesWithProperty[wpIdx];
|
|
KeyframeData &toKeyframe = sortedKeyframes[kfIdx];
|
|
|
|
nsRefPtr<nsStyleContext> toContext =
|
|
resolvedStyles.Get(mPresContext, aStyleContext, toKeyframe.mRule);
|
|
|
|
if (fromKeyframe) {
|
|
interpolated = interpolated &&
|
|
BuildSegment(propData.mSegments, prop, aSrc,
|
|
fromKeyframe->mKey, fromContext,
|
|
fromKeyframe->mRule->Declaration(),
|
|
toKeyframe.mKey, toContext);
|
|
} else {
|
|
if (toKeyframe.mKey != 0.0f) {
|
|
// There's no data for this property at 0%, so use the
|
|
// cascaded value above us.
|
|
interpolated = interpolated &&
|
|
BuildSegment(propData.mSegments, prop, aSrc,
|
|
0.0f, aStyleContext, nsnull,
|
|
toKeyframe.mKey, toContext);
|
|
}
|
|
}
|
|
|
|
fromContext = toContext;
|
|
fromKeyframe = &toKeyframe;
|
|
}
|
|
|
|
if (fromKeyframe->mKey != 1.0f) {
|
|
// There's no data for this property at 100%, so use the
|
|
// cascaded value above us.
|
|
interpolated = interpolated &&
|
|
BuildSegment(propData.mSegments, prop, aSrc,
|
|
fromKeyframe->mKey, fromContext,
|
|
fromKeyframe->mRule->Declaration(),
|
|
1.0f, aStyleContext);
|
|
}
|
|
|
|
// If we failed to build any segments due to inability to
|
|
// interpolate, remove the property from the animation. (It's not
|
|
// clear if this is the right thing to do -- we could run some of
|
|
// the segments, but it's really not clear whether we should skip
|
|
// values (which?) or skip segments, so best to skip the whole
|
|
// thing for now.)
|
|
if (!interpolated) {
|
|
aDest.mProperties.RemoveElementAt(aDest.mProperties.Length() - 1);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
bool
|
|
nsAnimationManager::BuildSegment(InfallibleTArray<AnimationPropertySegment>&
|
|
aSegments,
|
|
nsCSSProperty aProperty,
|
|
const nsAnimation& aAnimation,
|
|
float aFromKey, nsStyleContext* aFromContext,
|
|
mozilla::css::Declaration* aFromDeclaration,
|
|
float aToKey, nsStyleContext* aToContext)
|
|
{
|
|
nsStyleAnimation::Value fromValue, toValue, dummyValue;
|
|
if (!ExtractComputedValueForTransition(aProperty, aFromContext, fromValue) ||
|
|
!ExtractComputedValueForTransition(aProperty, aToContext, toValue) ||
|
|
// Check that we can interpolate between these values
|
|
// (If this is ever a performance problem, we could add a
|
|
// CanInterpolate method, but it seems fine for now.)
|
|
!nsStyleAnimation::Interpolate(aProperty, fromValue, toValue,
|
|
0.5, dummyValue)) {
|
|
return false;
|
|
}
|
|
|
|
AnimationPropertySegment &segment = *aSegments.AppendElement();
|
|
|
|
segment.mFromValue = fromValue;
|
|
segment.mToValue = toValue;
|
|
segment.mFromKey = aFromKey;
|
|
segment.mToKey = aToKey;
|
|
const nsTimingFunction *tf;
|
|
if (aFromDeclaration &&
|
|
aFromDeclaration->HasProperty(eCSSProperty_animation_timing_function)) {
|
|
tf = &aFromContext->GetStyleDisplay()->mAnimations[0].GetTimingFunction();
|
|
} else {
|
|
tf = &aAnimation.GetTimingFunction();
|
|
}
|
|
segment.mTimingFunction.Init(*tf);
|
|
|
|
return true;
|
|
}
|
|
|
|
nsIStyleRule*
|
|
nsAnimationManager::GetAnimationRule(mozilla::dom::Element* aElement,
|
|
nsCSSPseudoElements::Type aPseudoType)
|
|
{
|
|
NS_ABORT_IF_FALSE(
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_NotPseudoElement ||
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_before ||
|
|
aPseudoType == nsCSSPseudoElements::ePseudo_after,
|
|
"forbidden pseudo type");
|
|
|
|
ElementAnimations *ea =
|
|
GetElementAnimations(aElement, aPseudoType, false);
|
|
if (!ea) {
|
|
return nsnull;
|
|
}
|
|
|
|
NS_WARN_IF_FALSE(ea->mStyleRuleRefreshTime ==
|
|
mPresContext->RefreshDriver()->MostRecentRefresh(),
|
|
"should already have refreshed style rule");
|
|
|
|
if (mPresContext->IsProcessingRestyles() &&
|
|
!mPresContext->IsProcessingAnimationStyleChange()) {
|
|
// During the non-animation part of processing restyles, we don't
|
|
// add the animation rule.
|
|
|
|
if (ea->mStyleRule) {
|
|
ea->PostRestyleForAnimation(mPresContext);
|
|
}
|
|
|
|
return nsnull;
|
|
}
|
|
|
|
return ea->mStyleRule;
|
|
}
|
|
|
|
/* virtual */ void
|
|
nsAnimationManager::WillRefresh(mozilla::TimeStamp aTime)
|
|
{
|
|
NS_ABORT_IF_FALSE(mPresContext,
|
|
"refresh driver should not notify additional observers "
|
|
"after pres context has been destroyed");
|
|
if (!mPresContext->GetPresShell()) {
|
|
// Someone might be keeping mPresContext alive past the point
|
|
// where it has been torn down; don't bother doing anything in
|
|
// this case. But do get rid of all our transitions so we stop
|
|
// triggering refreshes.
|
|
RemoveAllElementData();
|
|
return;
|
|
}
|
|
|
|
// FIXME: check that there's at least one style rule that's not
|
|
// in its "done" state, and if there isn't, remove ourselves from
|
|
// the refresh driver (but leave the animations!).
|
|
for (PRCList *l = PR_LIST_HEAD(&mElementData); l != &mElementData;
|
|
l = PR_NEXT_LINK(l)) {
|
|
ElementAnimations *ea = static_cast<ElementAnimations*>(l);
|
|
nsRefPtr<css::AnimValuesStyleRule> oldStyleRule = ea->mStyleRule;
|
|
ea->EnsureStyleRuleFor(mPresContext->RefreshDriver()->MostRecentRefresh(),
|
|
mPendingEvents);
|
|
if (oldStyleRule != ea->mStyleRule) {
|
|
ea->PostRestyleForAnimation(mPresContext);
|
|
}
|
|
}
|
|
|
|
DispatchEvents(); // may destroy us
|
|
}
|
|
|
|
void
|
|
nsAnimationManager::DoDispatchEvents()
|
|
{
|
|
EventArray events;
|
|
mPendingEvents.SwapElements(events);
|
|
for (PRUint32 i = 0, i_end = events.Length(); i < i_end; ++i) {
|
|
AnimationEventInfo &info = events[i];
|
|
nsEventDispatcher::Dispatch(info.mElement, mPresContext, &info.mEvent);
|
|
|
|
if (!mPresContext) {
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
nsCSSKeyframesRule*
|
|
nsAnimationManager::KeyframesRuleFor(const nsSubstring& aName)
|
|
{
|
|
if (mKeyframesListIsDirty) {
|
|
mKeyframesListIsDirty = false;
|
|
|
|
nsTArray<nsCSSKeyframesRule*> rules;
|
|
mPresContext->StyleSet()->AppendKeyframesRules(mPresContext, rules);
|
|
|
|
// Per css3-animations, the last @keyframes rule specified wins.
|
|
mKeyframesRules.Clear();
|
|
for (PRUint32 i = 0, i_end = rules.Length(); i != i_end; ++i) {
|
|
nsCSSKeyframesRule *rule = rules[i];
|
|
mKeyframesRules.Put(rule->GetName(), rule);
|
|
}
|
|
}
|
|
|
|
return mKeyframesRules.Get(aName);
|
|
}
|
|
|