256 lines
6.9 KiB
C++
256 lines
6.9 KiB
C++
/*
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* Copyright (C) 2020 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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#pragma once
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#include "FontBaseline.h"
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#include "LayoutIntegrationLineIteratorLegacyPath.h"
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#include "LayoutIntegrationLineIteratorModernPath.h"
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#include <wtf/Variant.h>
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namespace WebCore {
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namespace LayoutIntegration {
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class LineIterator;
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class PathIterator;
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class RunIterator;
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struct EndLineIterator { };
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class PathLine {
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public:
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using PathVariant = Variant<
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#if ENABLE(LAYOUT_FORMATTING_CONTEXT)
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LineIteratorModernPath,
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#endif
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LineIteratorLegacyPath
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>;
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PathLine(PathVariant&&);
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LayoutUnit top() const;
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LayoutUnit bottom() const;
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LayoutUnit selectionTop() const;
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LayoutUnit selectionTopForHitTesting() const;
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LayoutUnit selectionBottom() const;
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LayoutUnit selectionHeight() const;
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LayoutUnit lineBoxTop() const;
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LayoutUnit lineBoxBottom() const;
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LayoutRect selectionRect() const;
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float y() const;
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float contentLogicalLeft() const;
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float contentLogicalRight() const;
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float logicalHeight() const;
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int blockDirectionPointInLine() const;
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bool isHorizontal() const;
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FontBaseline baselineType() const;
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const RenderBlockFlow& containingBlock() const;
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const LegacyRootInlineBox* legacyRootInlineBox() const;
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protected:
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friend class LineIterator;
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PathVariant m_pathVariant;
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};
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class LineIterator {
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public:
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LineIterator() : m_line(LineIteratorLegacyPath { nullptr }) { };
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LineIterator(const LegacyRootInlineBox* rootInlineBox) : m_line(LineIteratorLegacyPath { rootInlineBox }) { };
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LineIterator(PathLine::PathVariant&&);
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LineIterator& operator++() { return traverseNext(); }
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LineIterator& traverseNext();
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LineIterator& traversePrevious();
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LineIterator next() const;
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LineIterator previous() const;
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bool isFirst() const { return !previous(); }
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explicit operator bool() const { return !atEnd(); }
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bool operator==(const LineIterator&) const;
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bool operator!=(const LineIterator& other) const { return !(*this == other); }
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bool operator==(EndLineIterator) const { return atEnd(); }
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bool operator!=(EndLineIterator) const { return !atEnd(); }
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const PathLine& operator*() const { return m_line; }
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const PathLine* operator->() const { return &m_line; }
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bool atEnd() const;
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RunIterator firstRun() const;
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RunIterator lastRun() const;
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RunIterator closestRunForPoint(const IntPoint& pointInContents, bool editableOnly);
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RunIterator closestRunForLogicalLeftPosition(int position, bool editableOnly = false);
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RunIterator logicalStartRun() const;
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RunIterator logicalEndRun() const;
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RunIterator logicalStartRunWithNode() const;
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RunIterator logicalEndRunWithNode() const;
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private:
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PathLine m_line;
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};
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LineIterator firstLineFor(const RenderBlockFlow&);
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LineIterator lastLineFor(const RenderBlockFlow&);
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// -----------------------------------------------
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inline PathLine::PathLine(PathVariant&& path)
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: m_pathVariant(WTFMove(path))
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{
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}
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inline LayoutUnit PathLine::top() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.top();
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});
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}
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inline LayoutUnit PathLine::bottom() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.bottom();
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});
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}
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inline LayoutUnit PathLine::selectionTop() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.selectionTop();
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});
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}
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inline LayoutUnit PathLine::selectionTopForHitTesting() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.selectionTopForHitTesting();
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});
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}
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inline LayoutUnit PathLine::selectionBottom() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.selectionBottom();
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});
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}
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inline LayoutUnit PathLine::selectionHeight() const
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{
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return selectionBottom() - selectionTop();
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}
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inline LayoutUnit PathLine::lineBoxTop() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.lineBoxTop();
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});
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}
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inline LayoutUnit PathLine::lineBoxBottom() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.lineBoxBottom();
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});
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}
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inline LayoutRect PathLine::selectionRect() const
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{
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return { LayoutPoint { contentLogicalLeft(), selectionTop() }, LayoutPoint { contentLogicalRight(), selectionBottom() } };
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}
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inline float PathLine::y() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.y();
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});
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}
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inline float PathLine::contentLogicalLeft() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.contentLogicalLeft();
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});
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}
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inline float PathLine::contentLogicalRight() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.contentLogicalRight();
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});
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}
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inline float PathLine::logicalHeight() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.logicalHeight();
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});
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}
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inline bool PathLine::isHorizontal() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.isHorizontal();
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});
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}
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inline FontBaseline PathLine::baselineType() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.baselineType();
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});
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}
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inline const RenderBlockFlow& PathLine::containingBlock() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) -> const RenderBlockFlow& {
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return path.containingBlock();
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});
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}
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inline const LegacyRootInlineBox* PathLine::legacyRootInlineBox() const
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{
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return WTF::switchOn(m_pathVariant, [](const auto& path) {
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return path.legacyRootInlineBox();
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});
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}
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}
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}
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