| /* |
| * Copyright (C) 2020 Apple Inc. All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, |
| * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS |
| * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
| * THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| #include "LayoutIntegrationLineIteratorLegacyPath.h" |
| #include "LayoutIntegrationLineIteratorModernPath.h" |
| #include <wtf/Variant.h> |
| |
| namespace WebCore { |
| |
| namespace LayoutIntegration { |
| |
| class LineIterator; |
| class PathIterator; |
| class RunIterator; |
| |
| struct EndLineIterator { }; |
| |
| class PathLine { |
| public: |
| using PathVariant = Variant< |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| LineIteratorModernPath, |
| #endif |
| LineIteratorLegacyPath |
| >; |
| |
| PathLine(PathVariant&&); |
| |
| LayoutUnit top() const; |
| LayoutUnit bottom() const; |
| LayoutUnit selectionTop() const; |
| LayoutUnit selectionTopForHitTesting() const; |
| LayoutUnit selectionBottom() const; |
| LayoutUnit selectionHeight() const; |
| LayoutUnit lineBoxTop() const; |
| LayoutUnit lineBoxBottom() const; |
| |
| LayoutRect selectionRect() const; |
| |
| float y() const; |
| float contentLogicalLeft() const; |
| float contentLogicalRight() const; |
| float logicalHeight() const; |
| |
| int blockDirectionPointInLine() const; |
| |
| bool isHorizontal() const; |
| |
| const RenderBlockFlow& containingBlock() const; |
| const RootInlineBox* legacyRootInlineBox() const; |
| |
| protected: |
| friend class LineIterator; |
| |
| PathVariant m_pathVariant; |
| }; |
| |
| class LineIterator { |
| public: |
| LineIterator() : m_line(LineIteratorLegacyPath { nullptr }) { }; |
| LineIterator(const RootInlineBox* rootInlineBox) : m_line(LineIteratorLegacyPath { rootInlineBox }) { }; |
| LineIterator(PathLine::PathVariant&&); |
| |
| LineIterator& operator++() { return traverseNext(); } |
| LineIterator& traverseNext(); |
| LineIterator& traversePrevious(); |
| |
| LineIterator next() const; |
| LineIterator previous() const; |
| |
| explicit operator bool() const { return !atEnd(); } |
| |
| bool operator==(const LineIterator&) const; |
| bool operator!=(const LineIterator& other) const { return !(*this == other); } |
| |
| bool operator==(EndLineIterator) const { return atEnd(); } |
| bool operator!=(EndLineIterator) const { return !atEnd(); } |
| |
| const PathLine& operator*() const { return m_line; } |
| const PathLine* operator->() const { return &m_line; } |
| |
| bool atEnd() const; |
| |
| RunIterator firstRun() const; |
| RunIterator lastRun() const; |
| |
| RunIterator closestRunForPoint(const IntPoint& pointInContents, bool editableOnly); |
| RunIterator closestRunForLogicalLeftPosition(int position, bool editableOnly = false); |
| |
| RunIterator logicalStartRun() const; |
| RunIterator logicalEndRun() const; |
| RunIterator logicalStartRunWithNode() const; |
| RunIterator logicalEndRunWithNode() const; |
| |
| private: |
| PathLine m_line; |
| }; |
| |
| LineIterator firstLineFor(const RenderBlockFlow&); |
| LineIterator lastLineFor(const RenderBlockFlow&); |
| |
| // ----------------------------------------------- |
| |
| inline PathLine::PathLine(PathVariant&& path) |
| : m_pathVariant(WTFMove(path)) |
| { |
| } |
| |
| inline LayoutUnit PathLine::top() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.top(); |
| }); |
| } |
| |
| inline LayoutUnit PathLine::bottom() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.bottom(); |
| }); |
| } |
| |
| inline LayoutUnit PathLine::selectionTop() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.selectionTop(); |
| }); |
| } |
| |
| inline LayoutUnit PathLine::selectionTopForHitTesting() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.selectionTopForHitTesting(); |
| }); |
| } |
| |
| inline LayoutUnit PathLine::selectionBottom() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.selectionBottom(); |
| }); |
| } |
| |
| inline LayoutUnit PathLine::selectionHeight() const |
| { |
| return selectionBottom() - selectionTop(); |
| } |
| |
| inline LayoutUnit PathLine::lineBoxTop() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.lineBoxTop(); |
| }); |
| } |
| |
| inline LayoutUnit PathLine::lineBoxBottom() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.lineBoxBottom(); |
| }); |
| } |
| |
| inline LayoutRect PathLine::selectionRect() const |
| { |
| return { LayoutPoint { contentLogicalLeft(), selectionTop() }, LayoutPoint { contentLogicalRight(), selectionBottom() } }; |
| } |
| |
| inline float PathLine::y() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.y(); |
| }); |
| } |
| |
| inline float PathLine::contentLogicalLeft() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.contentLogicalLeft(); |
| }); |
| } |
| |
| inline float PathLine::contentLogicalRight() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.contentLogicalRight(); |
| }); |
| } |
| |
| inline float PathLine::logicalHeight() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.logicalHeight(); |
| }); |
| } |
| |
| inline bool PathLine::isHorizontal() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.isHorizontal(); |
| }); |
| } |
| |
| inline const RenderBlockFlow& PathLine::containingBlock() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) -> const RenderBlockFlow& { |
| return path.containingBlock(); |
| }); |
| } |
| |
| inline const RootInlineBox* PathLine::legacyRootInlineBox() const |
| { |
| return WTF::switchOn(m_pathVariant, [](const auto& path) { |
| return path.legacyRootInlineBox(); |
| }); |
| } |
| |
| } |
| } |
| |