1/* 2 * Copyright (C) 2012 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "ScrollingStateFixedNode.h" 28 29#include "GraphicsLayer.h" 30#include "ScrollingStateTree.h" 31#include "TextStream.h" 32#include <wtf/OwnPtr.h> 33 34#if ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS) 35 36namespace WebCore { 37 38PassRefPtr<ScrollingStateFixedNode> ScrollingStateFixedNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID) 39{ 40 return adoptRef(new ScrollingStateFixedNode(stateTree, nodeID)); 41} 42 43ScrollingStateFixedNode::ScrollingStateFixedNode(ScrollingStateTree& tree, ScrollingNodeID nodeID) 44 : ScrollingStateNode(FixedNode, tree, nodeID) 45{ 46} 47 48ScrollingStateFixedNode::ScrollingStateFixedNode(const ScrollingStateFixedNode& node, ScrollingStateTree& adoptiveTree) 49 : ScrollingStateNode(node, adoptiveTree) 50 , m_constraints(FixedPositionViewportConstraints(node.viewportConstraints())) 51{ 52} 53 54ScrollingStateFixedNode::~ScrollingStateFixedNode() 55{ 56} 57 58PassRefPtr<ScrollingStateNode> ScrollingStateFixedNode::clone(ScrollingStateTree& adoptiveTree) 59{ 60 return adoptRef(new ScrollingStateFixedNode(*this, adoptiveTree)); 61} 62 63void ScrollingStateFixedNode::updateConstraints(const FixedPositionViewportConstraints& constraints) 64{ 65 if (m_constraints == constraints) 66 return; 67 68 m_constraints = constraints; 69 setPropertyChanged(ViewportConstraints); 70} 71 72void ScrollingStateFixedNode::syncLayerPositionForViewportRect(const LayoutRect& viewportRect) 73{ 74 FloatPoint position = m_constraints.layerPositionForViewportRect(viewportRect); 75 if (layer().representsGraphicsLayer()) 76 static_cast<GraphicsLayer*>(layer())->syncPosition(position); 77} 78 79void ScrollingStateFixedNode::dumpProperties(TextStream& ts, int indent) const 80{ 81 ts << "(" << "Fixed node" << "\n"; 82 83 if (m_constraints.anchorEdges()) { 84 writeIndent(ts, indent + 1); 85 ts << "(anchor edges: "; 86 if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeLeft)) 87 ts << "AnchorEdgeLeft "; 88 if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeRight)) 89 ts << "AnchorEdgeRight "; 90 if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeTop)) 91 ts << "AnchorEdgeTop"; 92 if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeBottom)) 93 ts << "AnchorEdgeBottom"; 94 ts << ")\n"; 95 } 96 97 if (!m_constraints.alignmentOffset().isEmpty()) { 98 writeIndent(ts, indent + 1); 99 ts << "(alignment offset " << m_constraints.alignmentOffset().width() << " " << m_constraints.alignmentOffset().height() << ")\n"; 100 } 101 102 if (!m_constraints.viewportRectAtLastLayout().isEmpty()) { 103 writeIndent(ts, indent + 1); 104 FloatRect viewportRect = m_constraints.viewportRectAtLastLayout(); 105 ts << "(viewport rect at last layout: " << viewportRect.x() << " " << viewportRect.y() << " " << viewportRect.width() << " " << viewportRect.height() << ")\n"; 106 } 107 108 if (m_constraints.layerPositionAtLastLayout() != FloatPoint()) { 109 writeIndent(ts, indent + 1); 110 ts << "(layer position at last layout " << m_constraints.layerPositionAtLastLayout().x() << " " << m_constraints.layerPositionAtLastLayout().y() << ")\n"; 111 } 112} 113 114} // namespace WebCore 115 116#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS) 117