Index: Source/platform/scroll/ProgrammaticScrollAnimator.cpp |
diff --git a/Source/platform/scroll/ProgrammaticScrollAnimator.cpp b/Source/platform/scroll/ProgrammaticScrollAnimator.cpp |
new file mode 100644 |
index 0000000000000000000000000000000000000000..dfc4a43df032f5d6f01e6b0848e190fb3756073c |
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+++ b/Source/platform/scroll/ProgrammaticScrollAnimator.cpp |
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+/* |
+ * Copyright (C) 2014 Google 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: |
+ * |
+ * * Redistributions of source code must retain the above copyright |
+ * notice, this list of conditions and the following disclaimer. |
+ * * 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. |
+ * * Neither the name of Google Inc. 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 THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT |
+ * OWNER OR 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 "platform/scroll/ProgrammaticScrollAnimator.h" |
+ |
+#include "platform/geometry/FloatPoint.h" |
+#include "platform/geometry/IntPoint.h" |
+#include "platform/graphics/GraphicsLayer.h" |
+#include "platform/scroll/ScrollableArea.h" |
+#include "public/platform/Platform.h" |
+#include "public/platform/WebAnimation.h" |
+#include "public/platform/WebAnimationCurve.h" |
+#include "public/platform/WebCompositorSupport.h" |
+#include "public/platform/WebScrollOffsetAnimationCurve.h" |
+ |
+namespace WebCore { |
+ |
+PassOwnPtr<ProgrammaticScrollAnimator> ProgrammaticScrollAnimator::create(ScrollableArea* scrollableArea) |
+{ |
+ return adoptPtr(new ProgrammaticScrollAnimator(scrollableArea)); |
+} |
+ |
+ProgrammaticScrollAnimator::ProgrammaticScrollAnimator(ScrollableArea* scrollableArea) |
+ : m_scrollableArea(scrollableArea) |
+ , m_animationId(0) |
+ , m_startTime(0.0) |
+{ |
+} |
+ |
+ProgrammaticScrollAnimator::~ProgrammaticScrollAnimator() |
+{ |
+} |
+ |
+void ProgrammaticScrollAnimator::resetAnimationState() |
+{ |
+ m_animationCurve.clear(); |
+ m_animationId = 0; |
+ m_startTime = 0.0; |
+ m_scrollableArea->deregisterForAnimation(); |
+} |
+ |
+void ProgrammaticScrollAnimator::animateToOffset(FloatPoint offset) |
+{ |
+ m_startTime = 0.0; |
+ m_targetOffset = offset; |
+ OwnPtr<blink::WebScrollOffsetAnimationCurve> curve = adoptPtr(blink::Platform::current()->compositorSupport()->createScrollOffsetAnimationCurve(m_targetOffset, blink::WebAnimationCurve::TimingFunctionTypeEaseInOut)); |
+ if (m_scrollableArea->canUseCompositedScrollAnimations()) { |
+ OwnPtr<blink::WebAnimation> animation = adoptPtr(blink::Platform::current()->compositorSupport()->createAnimation(*curve, blink::WebAnimation::TargetPropertyScrollOffset)); |
+ m_animationId = animation->id(); |
+ m_scrollableArea->layerForScrolling()->addAnimation(animation.release()); |
+ return; |
+ } |
+ |
+ m_animationCurve = curve.release(); |
+ m_animationCurve->setInitialValue(FloatPoint(m_scrollableArea->scrollPosition())); |
Ian Vollick
2014/02/06 16:02:31
Will ::tickAnimation continue to be called through
|
+ if (!m_scrollableArea->registerForAnimation() || !m_scrollableArea->scheduleAnimation()) { |
+ resetAnimationState(); |
+ m_scrollableArea->setScrollOffsetFromProgrammaticAnimation(IntPoint(offset.x(), offset.y())); |
+ } |
+} |
+ |
+void ProgrammaticScrollAnimator::cancelAnimation() |
+{ |
+ if (m_animationId && m_scrollableArea->layerForScrolling()) |
+ m_scrollableArea->layerForScrolling()->removeAnimation(m_animationId); |
+ |
+ resetAnimationState(); |
+} |
+ |
+void ProgrammaticScrollAnimator::tickAnimation(double monotonicTime) |
+{ |
+ if (m_animationCurve) { |
+ if (!m_startTime) |
+ m_startTime = monotonicTime; |
+ double elapsedTime = monotonicTime - m_startTime; |
+ bool isFinished = (elapsedTime > m_animationCurve->duration()); |
+ FloatPoint offset = m_animationCurve->getValue(elapsedTime); |
+ m_scrollableArea->setScrollOffsetFromProgrammaticAnimation(IntPoint(offset.x(), offset.y())); |
+ |
+ if (isFinished) { |
+ resetAnimationState(); |
+ } else if (!m_scrollableArea->scheduleAnimation()) { |
+ m_scrollableArea->setScrollOffsetFromProgrammaticAnimation(IntPoint(m_targetOffset.x(), m_targetOffset.y())); |
+ resetAnimationState(); |
+ } |
+ } |
+} |
+ |
+void ProgrammaticScrollAnimator::notifyAnimationStarted(double monotonicTime) |
+{ |
+ m_startTime = monotonicTime; |
+} |
+ |
+void ProgrammaticScrollAnimator::notifyAnimationFinished(double monotonicTime) |
+{ |
+ resetAnimationState(); |
+} |
+ |
+void ProgrammaticScrollAnimator::canUseCompositedScrollAnimationsDidChange() |
+{ |
+ // If we're running an animation on the compositor thread but composited |
+ // scrolling is no longer available, we need to take over the animation on |
+ // the main thread. |
+ if (m_animationId && !m_scrollableArea->canUseCompositedScrollAnimations()) { |
+ cancelAnimation(); |
+ animateToOffset(m_targetOffset); |
+ } |
+} |
+ |
+} // namespace WebCore |