187 lines
8.0 KiB
C++
187 lines
8.0 KiB
C++
/*
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* Copyright (C) 2012 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "ScrollingStateStickyNode.h"
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#if ENABLE(ASYNC_SCROLLING)
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#include "GraphicsLayer.h"
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#include "Logging.h"
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#include "ScrollingStateFixedNode.h"
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#include "ScrollingStateFrameScrollingNode.h"
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#include "ScrollingStateOverflowScrollProxyNode.h"
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#include "ScrollingStateOverflowScrollingNode.h"
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#include "ScrollingStateTree.h"
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#include "ScrollingTree.h"
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#include <wtf/text/TextStream.h>
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namespace WebCore {
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Ref<ScrollingStateStickyNode> ScrollingStateStickyNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
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{
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return adoptRef(*new ScrollingStateStickyNode(stateTree, nodeID));
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}
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ScrollingStateStickyNode::ScrollingStateStickyNode(ScrollingStateTree& tree, ScrollingNodeID nodeID)
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: ScrollingStateNode(ScrollingNodeType::Sticky, tree, nodeID)
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{
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}
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ScrollingStateStickyNode::ScrollingStateStickyNode(const ScrollingStateStickyNode& node, ScrollingStateTree& adoptiveTree)
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: ScrollingStateNode(node, adoptiveTree)
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, m_constraints(StickyPositionViewportConstraints(node.viewportConstraints()))
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{
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}
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ScrollingStateStickyNode::~ScrollingStateStickyNode() = default;
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Ref<ScrollingStateNode> ScrollingStateStickyNode::clone(ScrollingStateTree& adoptiveTree)
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{
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return adoptRef(*new ScrollingStateStickyNode(*this, adoptiveTree));
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}
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OptionSet<ScrollingStateNode::Property> ScrollingStateStickyNode::applicableProperties() const
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{
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constexpr OptionSet<Property> nodeProperties = { Property::ViewportConstraints };
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auto properties = ScrollingStateNode::applicableProperties();
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properties.add(nodeProperties);
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return properties;
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}
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void ScrollingStateStickyNode::updateConstraints(const StickyPositionViewportConstraints& constraints)
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{
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if (m_constraints == constraints)
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return;
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LOG_WITH_STREAM(Scrolling, stream << "ScrollingStateStickyNode " << scrollingNodeID() << " updateConstraints with constraining rect " << constraints.constrainingRectAtLastLayout() << " sticky offset " << constraints.stickyOffsetAtLastLayout() << " layer pos at last layout " << constraints.layerPositionAtLastLayout());
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m_constraints = constraints;
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setPropertyChanged(Property::ViewportConstraints);
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}
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FloatPoint ScrollingStateStickyNode::computeLayerPosition(const LayoutRect& viewportRect) const
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{
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// This logic follows ScrollingTreeStickyNode::computeLayerPosition().
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auto computeLayerPositionForScrollingNode = [&](ScrollingStateNode& scrollingStateNode) {
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FloatRect constrainingRect;
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if (is<ScrollingStateFrameScrollingNode>(scrollingStateNode))
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constrainingRect = viewportRect;
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else {
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auto& overflowScrollingNode = downcast<ScrollingStateOverflowScrollingNode>(scrollingStateNode);
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constrainingRect = FloatRect(overflowScrollingNode.scrollPosition(), m_constraints.constrainingRectAtLastLayout().size());
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}
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return m_constraints.layerPositionForConstrainingRect(constrainingRect);
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};
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for (auto* ancestor = parent(); ancestor; ancestor = ancestor->parent()) {
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if (is<ScrollingStateOverflowScrollProxyNode>(*ancestor)) {
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auto& overflowProxyNode = downcast<ScrollingStateOverflowScrollProxyNode>(*ancestor);
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auto overflowNode = scrollingStateTree().stateNodeForID(overflowProxyNode.overflowScrollingNode());
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if (!overflowNode)
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break;
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return computeLayerPositionForScrollingNode(*overflowNode);
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}
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if (is<ScrollingStateScrollingNode>(*ancestor))
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return computeLayerPositionForScrollingNode(*ancestor);
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if (is<ScrollingStateFixedNode>(*ancestor) || is<ScrollingStateStickyNode>(*ancestor)) {
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// FIXME: Do we need scrolling tree nodes at all for nested cases?
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return m_constraints.layerPositionAtLastLayout();
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}
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}
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ASSERT_NOT_REACHED();
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return m_constraints.layerPositionAtLastLayout();
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}
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void ScrollingStateStickyNode::reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction action)
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{
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FloatPoint position = computeLayerPosition(viewportRect);
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if (layer().representsGraphicsLayer()) {
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auto* graphicsLayer = static_cast<GraphicsLayer*>(layer());
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LOG_WITH_STREAM(Compositing, stream << "ScrollingStateStickyNode " << scrollingNodeID() << " reconcileLayerPositionForViewportRect " << action << " position of layer " << graphicsLayer->primaryLayerID() << " to " << position << " sticky offset " << m_constraints.stickyOffsetAtLastLayout());
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switch (action) {
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case ScrollingLayerPositionAction::Set:
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graphicsLayer->setPosition(position);
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break;
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case ScrollingLayerPositionAction::SetApproximate:
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graphicsLayer->setApproximatePosition(position);
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break;
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case ScrollingLayerPositionAction::Sync:
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graphicsLayer->syncPosition(position);
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break;
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}
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}
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}
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void ScrollingStateStickyNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
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{
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ts << "Sticky node";
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ScrollingStateNode::dumpProperties(ts, behavior);
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if (m_constraints.anchorEdges()) {
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TextStream::GroupScope scope(ts);
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ts << "anchor edges: ";
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeLeft))
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ts << "AnchorEdgeLeft ";
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeRight))
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ts << "AnchorEdgeRight ";
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeTop))
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ts << "AnchorEdgeTop ";
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeBottom))
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ts << "AnchorEdgeBottom";
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}
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeLeft))
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ts.dumpProperty("left offset", m_constraints.leftOffset());
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeRight))
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ts.dumpProperty("right offset", m_constraints.rightOffset());
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeTop))
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ts.dumpProperty("top offset", m_constraints.topOffset());
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if (m_constraints.hasAnchorEdge(ViewportConstraints::AnchorEdgeBottom))
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ts.dumpProperty("bottom offset", m_constraints.bottomOffset());
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ts.dumpProperty("containing block rect", m_constraints.containingBlockRect());
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ts.dumpProperty("sticky box rect", m_constraints.stickyBoxRect());
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ts.dumpProperty("constraining rect", m_constraints.constrainingRectAtLastLayout());
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ts.dumpProperty("sticky offset at last layout", m_constraints.stickyOffsetAtLastLayout());
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ts.dumpProperty("layer position at last layout", m_constraints.layerPositionAtLastLayout());
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}
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} // namespace WebCore
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#endif // ENABLE(ASYNC_SCROLLING)
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