зеркало из https://github.com/mozilla/pjs.git
923 строки
32 KiB
C++
923 строки
32 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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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.
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// This means that we honor dynamic changes, which isn't what the
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// spec says to do, but WebKit seems to honor at least some of
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// them. See
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// http://lists.w3.org/Archives/Public/www-style/2011Apr/0079.html
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// In order to honor what the spec said, we'd copy more data over
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// (or potentially optimize BuildAnimations to avoid rebuilding it
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// in the first place).
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if (!ea->mAnimations.IsEmpty()) {
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for (PRUint32 newIdx = 0, newEnd = newAnimations.Length();
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newIdx != newEnd; ++newIdx) {
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ElementAnimation *newAnim = &newAnimations[newIdx];
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// Find the matching animation with this name in the old list
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// of animations. Because of this code, they must all have
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// the same start time, though they might differ in pause
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// state. So if a page uses multiple copies of the same
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// animation in one element's animation list, and gives them
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// different pause states, they, well, get what they deserve.
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// We'll use the last one since it's more likely to be the one
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// doing something.
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const ElementAnimation *oldAnim = nsnull;
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for (PRUint32 oldIdx = ea->mAnimations.Length(); oldIdx-- != 0; ) {
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const ElementAnimation *a = &ea->mAnimations[oldIdx];
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if (a->mName == newAnim->mName) {
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|
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.
|
|
}
|
|
|
|
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) {
|
|
PR_STATIC_ASSERT(sizeof(PLDHashNumber) == sizeof(PRUint32));
|
|
PR_STATIC_ASSERT(PLDHashNumber(-1) > PLDHashNumber(0));
|
|
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;
|
|
nsCSSKeyframeRule *mRule;
|
|
};
|
|
|
|
typedef InfallibleTArray<KeyframeData> KeyframeDataArray;
|
|
|
|
static PLDHashOperator
|
|
AppendKeyframeData(const float &aKey, nsCSSKeyframeRule *aRule, void *aData)
|
|
{
|
|
KeyframeDataArray *array = static_cast<KeyframeDataArray*>(aData);
|
|
KeyframeData *data = array->AppendElement();
|
|
data->mKey = aKey;
|
|
data->mRule = aRule;
|
|
return PL_DHASH_NEXT;
|
|
}
|
|
|
|
struct KeyframeDataComparator {
|
|
bool Equals(const KeyframeData& A, const KeyframeData& B) const {
|
|
return A.mKey == B.mKey;
|
|
}
|
|
bool LessThan(const KeyframeData& A, const KeyframeData& B) const {
|
|
return A.mKey < B.mKey;
|
|
}
|
|
};
|
|
|
|
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;
|
|
}
|
|
|
|
// Build the set of unique keyframes in the @keyframes rule. Per
|
|
// css3-animations, later keyframes with the same key replace
|
|
// earlier ones (no cascading).
|
|
nsDataHashtable<PercentageHashKey, nsCSSKeyframeRule*> keyframes;
|
|
keyframes.Init(16); // FIXME: make infallible!
|
|
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) {
|
|
keyframes.Put(key, kfRule);
|
|
}
|
|
}
|
|
}
|
|
|
|
KeyframeDataArray sortedKeyframes;
|
|
keyframes.EnumerateRead(AppendKeyframeData, &sortedKeyframes);
|
|
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;
|
|
}
|
|
|
|
AnimationProperty &propData = *aDest.mProperties.AppendElement();
|
|
propData.mProperty = prop;
|
|
|
|
KeyframeData *fromKeyframe = nsnull;
|
|
nsRefPtr<nsStyleContext> fromContext;
|
|
bool interpolated = true;
|
|
for (PRUint32 kfIdx = 0, kfEnd = sortedKeyframes.Length();
|
|
kfIdx != kfEnd; ++kfIdx) {
|
|
KeyframeData &toKeyframe = sortedKeyframes[kfIdx];
|
|
if (!toKeyframe.mRule->Declaration()->HasProperty(prop)) {
|
|
continue;
|
|
}
|
|
|
|
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::DispatchEvents()
|
|
{
|
|
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);
|
|
}
|
|
|