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/*
* Copyright (C) 2014 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. 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 INC. 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 "ScrollingTreeFrameScrollingNode.h"
#if ENABLE(ASYNC_SCROLLING)
#include "ScrollingStateTree.h"
#include "ScrollingTree.h"
namespace WebCore {
ScrollingTreeFrameScrollingNode::ScrollingTreeFrameScrollingNode(ScrollingTree& scrollingTree, ScrollingNodeID nodeID)
: ScrollingTreeScrollingNode(scrollingTree, FrameScrollingNode, nodeID)
{
}
ScrollingTreeFrameScrollingNode::~ScrollingTreeFrameScrollingNode()
{
}
void ScrollingTreeFrameScrollingNode::updateBeforeChildren(const ScrollingStateNode& stateNode)
{
ScrollingTreeScrollingNode::updateBeforeChildren(stateNode);
const ScrollingStateFrameScrollingNode& state = downcast<ScrollingStateFrameScrollingNode>(stateNode);
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::FrameScaleFactor))
m_frameScaleFactor = state.frameScaleFactor();
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::ReasonsForSynchronousScrolling))
m_synchronousScrollingReasons = state.synchronousScrollingReasons();
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::HeaderHeight))
m_headerHeight = state.headerHeight();
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::FooterHeight))
m_footerHeight = state.footerHeight();
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::BehaviorForFixedElements))
m_behaviorForFixed = state.scrollBehaviorForFixedElements();
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::TopContentInset))
m_topContentInset = state.topContentInset();
if (state.hasChangedProperty(ScrollingStateFrameScrollingNode::FixedElementsLayoutRelativeToFrame))
m_fixedElementsLayoutRelativeToFrame = state.fixedElementsLayoutRelativeToFrame();
}
void ScrollingTreeFrameScrollingNode::scrollBy(const FloatSize& delta)
{
setScrollPosition(scrollPosition() + delta);
}
void ScrollingTreeFrameScrollingNode::scrollByWithoutContentEdgeConstraints(const FloatSize& offset)
{
setScrollPositionWithoutContentEdgeConstraints(scrollPosition() + offset);
}
void ScrollingTreeFrameScrollingNode::setScrollPosition(const FloatPoint& scrollPosition)
{
FloatPoint newScrollPosition = scrollPosition.constrainedBetween(minimumScrollPosition(), maximumScrollPosition());
setScrollPositionWithoutContentEdgeConstraints(newScrollPosition);
}
FloatSize ScrollingTreeFrameScrollingNode::viewToContentsOffset(const FloatPoint& scrollPosition) const
{
return toFloatSize(scrollPosition) - FloatSize(0, headerHeight() + topContentInset());
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING)
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