1/* 2 * Copyright (C) 2013 Nokia Corporation and/or its subsidiary(-ies). 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 THE COPYRIGHT HOLDERS ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27 28#if USE(COORDINATED_GRAPHICS) 29 30#include "ScrollingCoordinatorCoordinatedGraphics.h" 31 32#include "CoordinatedGraphicsLayer.h" 33#include "FrameView.h" 34#include "Page.h" 35#include "RenderLayer.h" 36#include "RenderLayerBacking.h" 37#include "ScrollingConstraints.h" 38#include "ScrollingStateFixedNode.h" 39#include "ScrollingStateScrollingNode.h" 40#include "ScrollingStateStickyNode.h" 41#include "ScrollingStateTree.h" 42#include "Settings.h" 43 44namespace WebCore { 45 46ScrollingCoordinatorCoordinatedGraphics::ScrollingCoordinatorCoordinatedGraphics(Page* page) 47 : ScrollingCoordinator(page) 48 , m_scrollingStateTree(ScrollingStateTree::create()) 49{ 50} 51 52ScrollingCoordinatorCoordinatedGraphics::~ScrollingCoordinatorCoordinatedGraphics() 53{ 54} 55 56ScrollingNodeID ScrollingCoordinatorCoordinatedGraphics::attachToStateTree(ScrollingNodeType nodeType, ScrollingNodeID newNodeID, ScrollingNodeID parentID) 57{ 58 return m_scrollingStateTree->attachNode(nodeType, newNodeID, parentID); 59} 60 61void ScrollingCoordinatorCoordinatedGraphics::detachFromStateTree(ScrollingNodeID nodeID) 62{ 63 ScrollingStateNode* node = m_scrollingStateTree->stateNodeForID(nodeID); 64 if (node && node->isFixedNode()) 65 toCoordinatedGraphicsLayer(node->graphicsLayer())->setFixedToViewport(false); 66 67 m_scrollingStateTree->detachNode(nodeID); 68} 69 70void ScrollingCoordinatorCoordinatedGraphics::clearStateTree() 71{ 72 m_scrollingStateTree->clear(); 73} 74 75void ScrollingCoordinatorCoordinatedGraphics::updateViewportConstrainedNode(ScrollingNodeID nodeID, const ViewportConstraints& constraints, GraphicsLayer* graphicsLayer) 76{ 77 ASSERT(supportsFixedPositionLayers()); 78 79 ScrollingStateNode* node = m_scrollingStateTree->stateNodeForID(nodeID); 80 if (!node) 81 return; 82 83 switch (constraints.constraintType()) { 84 case ViewportConstraints::FixedPositionConstaint: { 85 toCoordinatedGraphicsLayer(graphicsLayer)->setFixedToViewport(true); // FIXME : Use constraints! 86 ScrollingStateFixedNode* fixedNode = toScrollingStateFixedNode(node); 87 fixedNode->setScrollLayer(graphicsLayer); 88 break; 89 } 90 case ViewportConstraints::StickyPositionConstraint: 91 break; // FIXME : Support sticky elements. 92 default: 93 ASSERT_NOT_REACHED(); 94 } 95} 96 97void ScrollingCoordinatorCoordinatedGraphics::scrollableAreaScrollLayerDidChange(ScrollableArea* scrollableArea) 98{ 99 CoordinatedGraphicsLayer* layer = toCoordinatedGraphicsLayer(scrollLayerForScrollableArea(scrollableArea)); 100 if (!layer) 101 return; 102 103 layer->setScrollableArea(scrollableArea); 104} 105 106void ScrollingCoordinatorCoordinatedGraphics::willDestroyScrollableArea(ScrollableArea* scrollableArea) 107{ 108 CoordinatedGraphicsLayer* layer = toCoordinatedGraphicsLayer(scrollLayerForScrollableArea(scrollableArea)); 109 if (!layer) 110 return; 111 112 layer->setScrollableArea(0); 113} 114 115} // namespace WebCore 116 117#endif // USE(COORDINATED_GRAPHICS) 118