| /* |
| * Copyright (C) 2019-2021 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 "InlineIteratorBoxLegacyPath.h" |
| #include "InlineIteratorBoxModernPath.h" |
| #include "LegacyInlineElementBox.h" |
| #include <variant> |
| |
| namespace WebCore { |
| |
| class RenderLineBreak; |
| class RenderObject; |
| class RenderStyle; |
| |
| namespace InlineIterator { |
| |
| class LineIterator; |
| class BoxIterator; |
| class LeafBoxIterator; |
| class TextBoxIterator; |
| |
| struct EndIterator { }; |
| |
| class Box { |
| public: |
| using PathVariant = std::variant< |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| BoxModernPath, |
| #endif |
| BoxLegacyPath |
| >; |
| |
| Box(PathVariant&&); |
| |
| bool isText() const; |
| bool isInlineBox() const; |
| bool isRootInlineBox() const; |
| |
| FloatRect rect() const; |
| |
| float logicalTop() const { return isHorizontal() ? rect().y() : rect().x(); } |
| float logicalBottom() const { return isHorizontal() ? rect().maxY() : rect().maxX(); } |
| float logicalLeft() const { return isHorizontal() ? rect().x() : rect().y(); } |
| float logicalRight() const { return isHorizontal() ? rect().maxX() : rect().maxY(); } |
| float logicalWidth() const { return isHorizontal() ? rect().width() : rect().height(); } |
| float logicalHeight() const { return isHorizontal() ? rect().height() : rect().width(); } |
| |
| bool isHorizontal() const; |
| bool isLineBreak() const; |
| |
| unsigned minimumCaretOffset() const; |
| unsigned maximumCaretOffset() const; |
| unsigned leftmostCaretOffset() const { return isLeftToRightDirection() ? minimumCaretOffset() : maximumCaretOffset(); } |
| unsigned rightmostCaretOffset() const { return isLeftToRightDirection() ? maximumCaretOffset() : minimumCaretOffset(); } |
| |
| unsigned char bidiLevel() const; |
| TextDirection direction() const { return bidiLevel() % 2 ? TextDirection::RTL : TextDirection::LTR; } |
| bool isLeftToRightDirection() const { return direction() == TextDirection::LTR; } |
| |
| RenderObject::HighlightState selectionState() const; |
| |
| const RenderObject& renderer() const; |
| const RenderStyle& style() const; |
| |
| // FIXME: Remove. For intermediate porting steps only. |
| const LegacyInlineBox* legacyInlineBox() const; |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| const InlineDisplay::Box* inlineBox() const; |
| #endif |
| |
| LeafBoxIterator nextOnLine() const; |
| LeafBoxIterator previousOnLine() const; |
| LeafBoxIterator nextOnLineIgnoringLineBreak() const; |
| LeafBoxIterator previousOnLineIgnoringLineBreak() const; |
| |
| LineIterator line() const; |
| |
| protected: |
| friend class BoxIterator; |
| friend class InlineBoxIterator; |
| friend class LeafBoxIterator; |
| friend class TextBoxIterator; |
| |
| // To help with debugging. |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| const BoxModernPath& modernPath() const; |
| #endif |
| const BoxLegacyPath& legacyPath() const; |
| |
| PathVariant m_pathVariant; |
| }; |
| |
| class BoxIterator { |
| public: |
| explicit operator bool() const { return !atEnd(); } |
| |
| bool operator==(const BoxIterator&) const; |
| bool operator!=(const BoxIterator& other) const { return !(*this == other); } |
| |
| bool operator==(EndIterator) const { return atEnd(); } |
| bool operator!=(EndIterator) const { return !atEnd(); } |
| |
| const Box& operator*() const { return m_box; } |
| const Box* operator->() const { return &m_box; } |
| |
| bool atEnd() const; |
| |
| protected: |
| BoxIterator() : m_box(BoxLegacyPath { nullptr }) { }; |
| BoxIterator(Box::PathVariant&&); |
| BoxIterator(const Box&); |
| |
| Box m_box; |
| }; |
| |
| class LeafBoxIterator : public BoxIterator { |
| public: |
| LeafBoxIterator() = default; |
| LeafBoxIterator(Box::PathVariant&&); |
| LeafBoxIterator(const Box&); |
| |
| LeafBoxIterator& traverseNextOnLine(); |
| LeafBoxIterator& traversePreviousOnLine(); |
| LeafBoxIterator& traverseNextOnLineIgnoringLineBreak(); |
| LeafBoxIterator& traversePreviousOnLineIgnoringLineBreak(); |
| }; |
| |
| LeafBoxIterator boxFor(const RenderLineBreak&); |
| LeafBoxIterator boxFor(const RenderBox&); |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| LeafBoxIterator boxFor(const LayoutIntegration::InlineContent&, size_t boxIndex); |
| #endif |
| |
| // ----------------------------------------------- |
| |
| inline Box::Box(PathVariant&& path) |
| : m_pathVariant(WTFMove(path)) |
| { |
| } |
| |
| inline bool Box::isText() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isText(); |
| }); |
| } |
| |
| inline bool Box::isInlineBox() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isInlineBox(); |
| }); |
| } |
| |
| inline bool Box::isRootInlineBox() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isRootInlineBox(); |
| }); |
| } |
| |
| inline FloatRect Box::rect() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.rect(); |
| }); |
| } |
| |
| inline bool Box::isHorizontal() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isHorizontal(); |
| }); |
| } |
| |
| inline bool Box::isLineBreak() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isLineBreak(); |
| }); |
| } |
| |
| inline unsigned Box::minimumCaretOffset() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.minimumCaretOffset(); |
| }); |
| } |
| |
| inline unsigned Box::maximumCaretOffset() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.maximumCaretOffset(); |
| }); |
| } |
| |
| inline unsigned char Box::bidiLevel() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.bidiLevel(); |
| }); |
| } |
| |
| inline const RenderObject& Box::renderer() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) -> const RenderObject& { |
| return path.renderer(); |
| }); |
| } |
| |
| inline const LegacyInlineBox* Box::legacyInlineBox() const |
| { |
| if (!std::holds_alternative<BoxLegacyPath>(m_pathVariant)) |
| return nullptr; |
| return std::get<BoxLegacyPath>(m_pathVariant).legacyInlineBox(); |
| } |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| inline const InlineDisplay::Box* Box::inlineBox() const |
| { |
| if (!std::holds_alternative<BoxModernPath>(m_pathVariant)) |
| return nullptr; |
| return &std::get<BoxModernPath>(m_pathVariant).box(); |
| } |
| #endif |
| |
| } |
| } |