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// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "CCScrollbarAnimationController.h"
#include "CCScrollbarLayerImpl.h"
#include <wtf/CurrentTime.h>
#if OS(ANDROID)
#include "CCScrollbarAnimationControllerLinearFade.h"
#endif
namespace cc {
#if OS(ANDROID)
PassOwnPtr<CCScrollbarAnimationController> CCScrollbarAnimationController::create(CCLayerImpl* scrollLayer)
{
static const double fadeoutDelay = 0.3;
static const double fadeoutLength = 0.3;
return CCScrollbarAnimationControllerLinearFade::create(scrollLayer, fadeoutDelay, fadeoutLength);
}
#else
PassOwnPtr<CCScrollbarAnimationController> CCScrollbarAnimationController::create(CCLayerImpl* scrollLayer)
{
return adoptPtr(new CCScrollbarAnimationController(scrollLayer));
}
#endif
CCScrollbarAnimationController::CCScrollbarAnimationController(CCLayerImpl* scrollLayer)
: m_horizontalScrollbarLayer(0)
, m_verticalScrollbarLayer(0)
{
CCScrollbarAnimationController::updateScrollOffsetAtTime(scrollLayer, 0);
}
CCScrollbarAnimationController::~CCScrollbarAnimationController()
{
}
void CCScrollbarAnimationController::didPinchGestureBegin()
{
didPinchGestureBeginAtTime(monotonicallyIncreasingTime());
}
void CCScrollbarAnimationController::didPinchGestureUpdate()
{
didPinchGestureUpdateAtTime(monotonicallyIncreasingTime());
}
void CCScrollbarAnimationController::didPinchGestureEnd()
{
didPinchGestureEndAtTime(monotonicallyIncreasingTime());
}
void CCScrollbarAnimationController::updateScrollOffset(CCLayerImpl* scrollLayer)
{
updateScrollOffsetAtTime(scrollLayer, monotonicallyIncreasingTime());
}
IntSize CCScrollbarAnimationController::getScrollLayerBounds(const CCLayerImpl* scrollLayer)
{
if (!scrollLayer->children().size())
return IntSize();
// Copy & paste from CCLayerTreeHostImpl...
// FIXME: Hardcoding the first child here is weird. Think of
// a cleaner way to get the contentBounds on the Impl side.
return scrollLayer->children()[0]->bounds();
}
void CCScrollbarAnimationController::updateScrollOffsetAtTime(CCLayerImpl* scrollLayer, double)
{
m_currentPos = scrollLayer->scrollPosition() + scrollLayer->scrollDelta();
m_totalSize = getScrollLayerBounds(scrollLayer);
m_maximum = scrollLayer->maxScrollPosition();
if (m_horizontalScrollbarLayer) {
m_horizontalScrollbarLayer->setCurrentPos(m_currentPos.x());
m_horizontalScrollbarLayer->setTotalSize(m_totalSize.width());
m_horizontalScrollbarLayer->setMaximum(m_maximum.width());
}
if (m_verticalScrollbarLayer) {
m_verticalScrollbarLayer->setCurrentPos(m_currentPos.y());
m_verticalScrollbarLayer->setTotalSize(m_totalSize.height());
m_verticalScrollbarLayer->setMaximum(m_maximum.height());
}
}
} // namespace cc
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