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/*
* Copyright (C) 2012 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 "ScrollingStateFixedNode.h"
#include "GraphicsLayer.h"
#include "Logging.h"
#include "ScrollingStateTree.h"
#include <wtf/text/TextStream.h>
#if ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)
namespace WebCore {
Ref<ScrollingStateFixedNode> ScrollingStateFixedNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
{
return adoptRef(*new ScrollingStateFixedNode(stateTree, nodeID));
}
ScrollingStateFixedNode::ScrollingStateFixedNode(ScrollingStateTree& tree, ScrollingNodeID nodeID)
: ScrollingStateNode(FixedNode, tree, nodeID)
{
}
ScrollingStateFixedNode::ScrollingStateFixedNode(const ScrollingStateFixedNode& node, ScrollingStateTree& adoptiveTree)
: ScrollingStateNode(node, adoptiveTree)
, m_constraints(FixedPositionViewportConstraints(node.viewportConstraints()))
{
}
ScrollingStateFixedNode::~ScrollingStateFixedNode()
{
}
Ref<ScrollingStateNode> ScrollingStateFixedNode::clone(ScrollingStateTree& adoptiveTree)
{
return adoptRef(*new ScrollingStateFixedNode(*this, adoptiveTree));
}
void ScrollingStateFixedNode::updateConstraints(const FixedPositionViewportConstraints& constraints)
{
if (m_constraints == constraints)
return;
LOG_WITH_STREAM(Scrolling, stream << "ScrollingStateFixedNode " << scrollingNodeID() << " updateConstraints with viewport rect " << constraints.viewportRectAtLastLayout() << " layer pos at last layout " << constraints.layerPositionAtLastLayout() << " offset from top " << (constraints.layerPositionAtLastLayout().y() - constraints.viewportRectAtLastLayout().y()));
m_constraints = constraints;
setPropertyChanged(ViewportConstraints);
}
void ScrollingStateFixedNode::reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction action)
{
FloatPoint position = m_constraints.layerPositionForViewportRect(viewportRect);
if (layer().representsGraphicsLayer()) {
GraphicsLayer* graphicsLayer = static_cast<GraphicsLayer*>(layer());
LOG_WITH_STREAM(Scrolling, stream << "ScrollingStateFixedNode " << scrollingNodeID() <<" reconcileLayerPositionForViewportRect " << action << " position of layer " << graphicsLayer->primaryLayerID() << " to " << position);
switch (action) {
case ScrollingLayerPositionAction::Set:
graphicsLayer->setPosition(position);
break;
case ScrollingLayerPositionAction::SetApproximate:
graphicsLayer->setApproximatePosition(position);
break;
case ScrollingLayerPositionAction::Sync:
graphicsLayer->syncPosition(position);
break;
}
}
}
void ScrollingStateFixedNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
{
ts << "Fixed node";
ScrollingStateNode::dumpProperties(ts, behavior);
if (m_constraints.anchorEdges()) {
TextStream::GroupScope scope(ts);
ts << "anchor edges: ";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeLeft))
ts << "AnchorEdgeLeft ";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeRight))
ts << "AnchorEdgeRight ";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeTop))
ts << "AnchorEdgeTop";
if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeBottom))
ts << "AnchorEdgeBottom";
}
if (!m_constraints.alignmentOffset().isEmpty())
ts.dumpProperty("alignment offset", m_constraints.alignmentOffset());
if (!m_constraints.viewportRectAtLastLayout().isEmpty())
ts.dumpProperty("viewport rect at last layout", m_constraints.viewportRectAtLastLayout());
if (m_constraints.layerPositionAtLastLayout() != FloatPoint())
ts.dumpProperty("layer position at last layout", m_constraints.layerPositionAtLastLayout());
}
} // namespace WebCore
#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)
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