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authorThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
committerThe Android Open Source Project <initial-contribution@android.com>2009-03-03 18:28:41 -0800
commit648161bb0edfc3d43db63caed5cc5213bc6cb78f (patch)
tree4b825dc642cb6eb9a060e54bf8d69288fbee4904 /WebCore/page/animation/KeyframeAnimation.cpp
parenta65af38181ac7d34544586bdb5cd004de93897ad (diff)
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diff --git a/WebCore/page/animation/KeyframeAnimation.cpp b/WebCore/page/animation/KeyframeAnimation.cpp
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-/*
- * Copyright (C) 2007 Apple Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of
- * its contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
- * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include "config.h"
-#include "KeyframeAnimation.h"
-
-#include "CSSPropertyNames.h"
-#include "CSSStyleSelector.h"
-#include "CompositeAnimation.h"
-#include "EventNames.h"
-#include "RenderObject.h"
-#include "SystemTime.h"
-
-namespace WebCore {
-
-KeyframeAnimation::KeyframeAnimation(const Animation* animation, RenderObject* renderer, int index, CompositeAnimation* compAnim, RenderStyle* unanimatedStyle)
- : AnimationBase(animation, renderer, compAnim)
- , m_keyframes(renderer, animation->name())
- , m_index(index)
- , m_unanimatedStyle(unanimatedStyle)
-{
- // Get the keyframe RenderStyles
- if (m_object && m_object->element() && m_object->element()->isElementNode())
- m_object->document()->styleSelector()->keyframeStylesForAnimation(static_cast<Element*>(m_object->element()), unanimatedStyle, m_keyframes);
-
- // Update the m_transformFunctionListValid flag based on whether the function lists in the keyframes match.
- validateTransformFunctionList();
-}
-
-KeyframeAnimation::~KeyframeAnimation()
-{
- // Do the cleanup here instead of in the base class so the specialized methods get called
- if (!postActive())
- updateStateMachine(AnimationStateInputEndAnimation, -1);
-}
-
-void KeyframeAnimation::animate(CompositeAnimation* animation, RenderObject* renderer, const RenderStyle* currentStyle,
- const RenderStyle* targetStyle, RefPtr<RenderStyle>& animatedStyle)
-{
- // If we have not yet started, we will not have a valid start time, so just start the animation if needed.
- if (isNew() && m_animation->playState() == AnimPlayStatePlaying)
- updateStateMachine(AnimationStateInputStartAnimation, -1);
-
- // If we get this far and the animation is done, it means we are cleaning up a just finished animation.
- // If so, we need to send back the targetStyle.
- if (postActive()) {
- if (!animatedStyle)
- animatedStyle = const_cast<RenderStyle*>(targetStyle);
- return;
- }
-
- // If we are waiting for the start timer, we don't want to change the style yet.
- // Special case - if the delay time is 0, then we do want to set the first frame of the
- // animation right away. This avoids a flash when the animation starts.
- if (waitingToStart() && m_animation->delay() > 0)
- return;
-
- // FIXME: we need to be more efficient about determining which keyframes we are animating between.
- // We should cache the last pair or something.
-
- // Find the first key
- double elapsedTime = (m_startTime > 0) ? ((!paused() ? currentTime() : m_pauseTime) - m_startTime) : 0;
- if (elapsedTime < 0)
- elapsedTime = 0;
-
- double t = m_animation->duration() ? (elapsedTime / m_animation->duration()) : 1;
- int i = static_cast<int>(t);
- t -= i;
- if (m_animation->direction() && (i & 1))
- t = 1 - t;
-
- const RenderStyle* fromStyle = 0;
- const RenderStyle* toStyle = 0;
- double scale = 1;
- double offset = 0;
- Vector<KeyframeValue>::const_iterator endKeyframes = m_keyframes.endKeyframes();
- for (Vector<KeyframeValue>::const_iterator it = m_keyframes.beginKeyframes(); it != endKeyframes; ++it) {
- if (t < it->key()) {
- // The first key should always be 0, so we should never succeed on the first key
- if (!fromStyle)
- break;
- scale = 1.0 / (it->key() - offset);
- toStyle = it->style();
- break;
- }
-
- offset = it->key();
- fromStyle = it->style();
- }
-
- // If either style is 0 we have an invalid case, just stop the animation.
- if (!fromStyle || !toStyle) {
- updateStateMachine(AnimationStateInputEndAnimation, -1);
- return;
- }
-
- // Run a cycle of animation.
- // We know we will need a new render style, so make one if needed.
- if (!animatedStyle)
- animatedStyle = RenderStyle::clone(targetStyle);
-
- const TimingFunction* timingFunction = 0;
- if (fromStyle->animations() && fromStyle->animations()->size() > 0)
- timingFunction = &(fromStyle->animations()->animation(0)->timingFunction());
-
- double prog = progress(scale, offset, timingFunction);
-
- HashSet<int>::const_iterator endProperties = m_keyframes.endProperties();
- for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != endProperties; ++it) {
- if (blendProperties(this, *it, animatedStyle.get(), fromStyle, toStyle, prog))
- setAnimating();
- }
-}
-
-bool KeyframeAnimation::hasAnimationForProperty(int property) const
-{
- HashSet<int>::const_iterator end = m_keyframes.endProperties();
- for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it) {
- if (*it == property)
- return true;
- }
-
- return false;
-}
-
-void KeyframeAnimation::endAnimation(bool)
-{
- // Restore the original (unanimated) style
- if (m_object)
- setChanged(m_object->element());
-}
-
-bool KeyframeAnimation::shouldSendEventForListener(Document::ListenerType listenerType)
-{
- return m_object->document()->hasListenerType(listenerType);
-}
-
-void KeyframeAnimation::onAnimationStart(double elapsedTime)
-{
- sendAnimationEvent(eventNames().webkitAnimationStartEvent, elapsedTime);
-}
-
-void KeyframeAnimation::onAnimationIteration(double elapsedTime)
-{
- sendAnimationEvent(eventNames().webkitAnimationIterationEvent, elapsedTime);
-}
-
-void KeyframeAnimation::onAnimationEnd(double elapsedTime)
-{
- if (!sendAnimationEvent(eventNames().webkitAnimationEndEvent, elapsedTime)) {
- // We didn't dispatch an event, which would call endAnimation(), so we'll just call it here.
- endAnimation(true);
- }
-}
-
-bool KeyframeAnimation::sendAnimationEvent(const AtomicString& eventType, double elapsedTime)
-{
- Document::ListenerType listenerType;
- if (eventType == eventNames().webkitAnimationIterationEvent)
- listenerType = Document::ANIMATIONITERATION_LISTENER;
- else if (eventType == eventNames().webkitAnimationEndEvent)
- listenerType = Document::ANIMATIONEND_LISTENER;
- else {
- ASSERT(eventType == eventNames().webkitAnimationStartEvent);
- listenerType = Document::ANIMATIONSTART_LISTENER;
- }
-
- if (shouldSendEventForListener(listenerType)) {
- // Dispatch the event
- RefPtr<Element> element;
- if (m_object->node() && m_object->node()->isElementNode())
- element = static_cast<Element*>(m_object->node());
-
- ASSERT(!element || element->document() && !element->document()->inPageCache());
- if (!element)
- return false;
-
- // Keep a reference to this ImplicitAnimation so it doesn't go away in the handler
- RefPtr<KeyframeAnimation> retainer(this);
-
- // Call the event handler
- element->dispatchWebKitAnimationEvent(eventType, m_keyframes.animationName(), elapsedTime);
-
- // Restore the original (unanimated) style
- if (eventType == eventNames().webkitAnimationEndEvent && element->renderer())
- setChanged(element.get());
-
- return true; // Did dispatch an event
- }
-
- return false; // Did not dispatch an event
-}
-
-void KeyframeAnimation::overrideAnimations()
-{
- // This will override implicit animations that match the properties in the keyframe animation
- HashSet<int>::const_iterator end = m_keyframes.endProperties();
- for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it)
- compositeAnimation()->overrideImplicitAnimations(*it);
-}
-
-void KeyframeAnimation::resumeOverriddenAnimations()
-{
- // This will resume overridden implicit animations
- HashSet<int>::const_iterator end = m_keyframes.endProperties();
- for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it)
- compositeAnimation()->resumeOverriddenImplicitAnimations(*it);
-}
-
-bool KeyframeAnimation::affectsProperty(int property) const
-{
- HashSet<int>::const_iterator end = m_keyframes.endProperties();
- for (HashSet<int>::const_iterator it = m_keyframes.beginProperties(); it != end; ++it) {
- if (*it == property)
- return true;
- }
- return false;
-}
-
-void KeyframeAnimation::validateTransformFunctionList()
-{
- m_transformFunctionListValid = false;
-
- if (m_keyframes.size() < 2 || !m_keyframes.containsProperty(CSSPropertyWebkitTransform))
- return;
-
- Vector<KeyframeValue>::const_iterator end = m_keyframes.endKeyframes();
-
- // Empty transforms match anything, so find the first non-empty entry as the reference
- size_t firstIndex = 0;
- Vector<KeyframeValue>::const_iterator firstIt = end;
-
- for (Vector<KeyframeValue>::const_iterator it = m_keyframes.beginKeyframes(); it != end; ++it, ++firstIndex) {
- if (it->style()->transform().operations().size() > 0) {
- firstIt = it;
- break;
- }
- }
-
- if (firstIt == end)
- return;
-
- const TransformOperations* firstVal = &firstIt->style()->transform();
-
- // See if the keyframes are valid
- for (Vector<KeyframeValue>::const_iterator it = firstIt+1; it != end; ++it) {
- const TransformOperations* val = &it->style()->transform();
-
- // A null transform matches anything
- if (val->operations().isEmpty())
- continue;
-
- // If the sizes of the function lists don't match, the lists don't match
- if (firstVal->operations().size() != val->operations().size())
- return;
-
- // If the types of each function are not the same, the lists don't match
- for (size_t j = 0; j < firstVal->operations().size(); ++j) {
- if (!firstVal->operations()[j]->isSameType(*val->operations()[j]))
- return;
- }
- }
-
- // Keyframes are valid
- m_transformFunctionListValid = true;
-}
-
-} // namespace WebCore