212 lines
7.0 KiB
C++
212 lines
7.0 KiB
C++
/*
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* Copyright (C) 2019 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 "LayerAncestorClippingStack.h"
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#include "GraphicsLayer.h"
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#include "ScrollingConstraints.h"
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#include "ScrollingCoordinator.h"
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#include <wtf/text/TextStream.h>
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namespace WebCore {
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LayerAncestorClippingStack::LayerAncestorClippingStack(Vector<CompositedClipData>&& clipDataStack)
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{
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m_stack.reserveInitialCapacity(clipDataStack.size());
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for (auto& clipDataEntry : clipDataStack)
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m_stack.uncheckedAppend({ WTFMove(clipDataEntry), 0, nullptr });
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}
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bool LayerAncestorClippingStack::equalToClipData(const Vector<CompositedClipData>& clipDataStack) const
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{
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if (m_stack.size() != clipDataStack.size())
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return false;
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for (unsigned i = 0; i < m_stack.size(); ++i) {
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if (m_stack[i].clipData != clipDataStack[i])
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return false;
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}
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return true;
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}
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bool LayerAncestorClippingStack::hasAnyScrollingLayers() const
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{
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for (const auto& entry : m_stack) {
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if (entry.clipData.isOverflowScroll)
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return true;
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}
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return false;
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}
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void LayerAncestorClippingStack::clear(ScrollingCoordinator* scrollingCoordinator)
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{
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for (auto& entry : m_stack) {
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if (entry.overflowScrollProxyNodeID) {
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ASSERT(scrollingCoordinator);
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scrollingCoordinator->unparentChildrenAndDestroyNode(entry.overflowScrollProxyNodeID);
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entry.overflowScrollProxyNodeID = 0;
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}
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GraphicsLayer::unparentAndClear(entry.clippingLayer);
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}
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}
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void LayerAncestorClippingStack::detachFromScrollingCoordinator(ScrollingCoordinator& scrollingCoordinator)
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{
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for (auto& entry : m_stack) {
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if (entry.overflowScrollProxyNodeID) {
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scrollingCoordinator.unparentChildrenAndDestroyNode(entry.overflowScrollProxyNodeID);
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entry.overflowScrollProxyNodeID = 0;
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}
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}
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}
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GraphicsLayer* LayerAncestorClippingStack::firstClippingLayer() const
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{
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return m_stack.first().clippingLayer.get();
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}
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GraphicsLayer* LayerAncestorClippingStack::lastClippingLayer() const
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{
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return m_stack.last().clippingLayer.get();
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}
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ScrollingNodeID LayerAncestorClippingStack::lastOverflowScrollProxyNodeID() const
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{
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for (auto& entry : WTF::makeReversedRange(m_stack)) {
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if (entry.overflowScrollProxyNodeID)
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return entry.overflowScrollProxyNodeID;
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}
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return 0;
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}
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void LayerAncestorClippingStack::updateScrollingNodeLayers(ScrollingCoordinator& scrollingCoordinator)
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{
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for (const auto& entry : m_stack) {
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if (!entry.clipData.isOverflowScroll)
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continue;
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scrollingCoordinator.setNodeLayers(entry.overflowScrollProxyNodeID, { entry.clippingLayer.get() });
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}
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}
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bool LayerAncestorClippingStack::updateWithClipData(ScrollingCoordinator* scrollingCoordinator, Vector<CompositedClipData>&& clipDataStack)
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{
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bool stackChanged = false;
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int clipEntryCount = clipDataStack.size();
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int stackEntryCount = m_stack.size();
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for (int i = 0; i < clipEntryCount; ++i) {
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auto& clipDataEntry = clipDataStack[i];
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if (i >= stackEntryCount) {
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m_stack.append({ WTFMove(clipDataEntry), 0, nullptr });
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stackChanged = true;
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continue;
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}
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auto& existingEntry = m_stack[i];
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if (existingEntry.clipData != clipDataEntry)
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stackChanged = true;
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if (existingEntry.clipData.isOverflowScroll && !clipDataEntry.isOverflowScroll) {
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ASSERT(scrollingCoordinator);
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scrollingCoordinator->unparentChildrenAndDestroyNode(existingEntry.overflowScrollProxyNodeID);
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existingEntry.overflowScrollProxyNodeID = 0;
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}
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existingEntry.clipData = WTFMove(clipDataEntry);
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}
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if (stackEntryCount > clipEntryCount) {
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for (int i = clipEntryCount; i < stackEntryCount; ++i) {
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auto& entry = m_stack[i];
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if (entry.overflowScrollProxyNodeID) {
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ASSERT(scrollingCoordinator);
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scrollingCoordinator->unparentChildrenAndDestroyNode(entry.overflowScrollProxyNodeID);
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}
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GraphicsLayer::unparentAndClear(entry.clippingLayer);
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}
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m_stack.shrink(clipEntryCount);
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stackChanged = true;
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} else
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m_stack.shrinkToFit();
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return stackChanged;
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}
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Vector<CompositedClipData> LayerAncestorClippingStack::compositedClipData() const
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{
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Vector<CompositedClipData> clipData;
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clipData.reserveInitialCapacity(m_stack.size());
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for (const auto& entry : m_stack)
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clipData.uncheckedAppend(entry.clipData);
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return clipData;
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}
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static TextStream& operator<<(TextStream& ts, const LayerAncestorClippingStack::ClippingStackEntry& entry)
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{
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ts.dumpProperty("layer", entry.clipData.clippingLayer.get());
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ts.dumpProperty("clip", entry.clipData.clipRect);
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ts.dumpProperty("isOverflowScroll", entry.clipData.isOverflowScroll);
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if (entry.overflowScrollProxyNodeID)
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ts.dumpProperty("overflowScrollProxyNodeID", entry.overflowScrollProxyNodeID);
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if (entry.clippingLayer)
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ts.dumpProperty("clippingLayer", entry.clippingLayer->primaryLayerID());
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return ts;
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}
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TextStream& operator<<(TextStream& ts, const LayerAncestorClippingStack& clipStack)
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{
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TextStream multilineStream;
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multilineStream.setIndent(ts.indent() + 2);
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{
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TextStream::GroupScope scope(ts);
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multilineStream << "LayerAncestorClippingStack";
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for (unsigned i = 0; i < clipStack.stack().size(); ++i) {
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auto& entry = clipStack.stack()[i];
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TextStream::GroupScope entryScope(multilineStream);
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multilineStream << "entry " << i;
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multilineStream << entry;
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}
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ts << multilineStream.release();
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}
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return ts;
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}
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} // namespace WebCore
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