| /* |
| * Copyright (C) 2019 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 "InlineElementBox.h" |
| #include "LineLayoutTraversalComplexPath.h" |
| #include "LineLayoutTraversalDisplayRunPath.h" |
| #include "LineLayoutTraversalSimplePath.h" |
| #include "RenderText.h" |
| #include <wtf/HashMap.h> |
| #include <wtf/IteratorRange.h> |
| #include <wtf/Variant.h> |
| #include <wtf/text/StringView.h> |
| |
| namespace WebCore { |
| |
| class RenderLineBreak; |
| |
| namespace LineLayoutTraversal { |
| |
| class ElementBoxIterator; |
| class TextBoxIterator; |
| |
| struct EndIterator { }; |
| |
| class Box { |
| public: |
| using PathVariant = Variant< |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| DisplayRunPath, |
| #endif |
| ComplexPath, |
| SimplePath |
| >; |
| |
| Box(PathVariant&&); |
| |
| FloatRect rect() const; |
| FloatRect logicalRect() const; |
| |
| bool isLeftToRightDirection() const; |
| bool dirOverride() const; |
| bool isLineBreak() const; |
| |
| protected: |
| friend class ElementBoxIterator; |
| friend class TextBoxIterator; |
| |
| PathVariant m_pathVariant; |
| }; |
| |
| class TextBox : public Box { |
| public: |
| TextBox(PathVariant&&); |
| |
| bool hasHyphen() const; |
| StringView text() const; |
| |
| // These offsets are relative to the text renderer (not flow). |
| unsigned localStartOffset() const; |
| unsigned localEndOffset() const; |
| unsigned length() const; |
| |
| bool isLastOnLine() const; |
| bool isLast() const; |
| }; |
| |
| class TextBoxIterator { |
| public: |
| TextBoxIterator() : m_textBox(ComplexPath { nullptr, { } }) { }; |
| TextBoxIterator(Box::PathVariant&&); |
| |
| TextBoxIterator& operator++() { return traverseNextInVisualOrder(); } |
| TextBoxIterator& traverseNextInVisualOrder(); |
| TextBoxIterator& traverseNextInTextOrder(); |
| |
| explicit operator bool() const { return !atEnd(); } |
| |
| bool operator==(const TextBoxIterator&) const; |
| bool operator!=(const TextBoxIterator& other) const { return !(*this == other); } |
| |
| bool operator==(EndIterator) const { return atEnd(); } |
| bool operator!=(EndIterator) const { return !atEnd(); } |
| |
| const TextBox& operator*() const { return m_textBox; } |
| const TextBox* operator->() const { return &m_textBox; } |
| |
| bool atEnd() const; |
| |
| private: |
| TextBox m_textBox; |
| }; |
| |
| class ElementBoxIterator { |
| public: |
| ElementBoxIterator() : m_box(ComplexPath { nullptr, { } }) { }; |
| ElementBoxIterator(Box::PathVariant&&); |
| |
| explicit operator bool() const { return !atEnd(); } |
| |
| const Box& operator*() const { return m_box; } |
| const Box* operator->() const { return &m_box; } |
| |
| bool atEnd() const; |
| |
| private: |
| Box m_box; |
| }; |
| |
| class TextBoxRange { |
| public: |
| TextBoxRange(TextBoxIterator begin) |
| : m_begin(begin) |
| { |
| } |
| |
| TextBoxIterator begin() const { return m_begin; } |
| EndIterator end() const { return { }; } |
| |
| private: |
| TextBoxIterator m_begin; |
| }; |
| |
| TextBoxIterator firstTextBoxFor(const RenderText&); |
| TextBoxIterator firstTextBoxInTextOrderFor(const RenderText&); |
| TextBoxRange textBoxesFor(const RenderText&); |
| ElementBoxIterator elementBoxFor(const RenderLineBreak&); |
| |
| // ----------------------------------------------- |
| |
| inline Box::Box(PathVariant&& path) |
| : m_pathVariant(WTFMove(path)) |
| { |
| } |
| |
| inline FloatRect Box::rect() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.rect(); |
| }); |
| } |
| |
| inline FloatRect Box::logicalRect() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.logicalRect(); |
| }); |
| } |
| |
| inline bool Box::isLeftToRightDirection() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isLeftToRightDirection(); |
| }); |
| } |
| |
| inline bool Box::dirOverride() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.dirOverride(); |
| }); |
| } |
| |
| inline bool Box::isLineBreak() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isLineBreak(); |
| }); |
| } |
| |
| inline bool TextBox::hasHyphen() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.hasHyphen(); |
| }); |
| } |
| |
| inline TextBox::TextBox(PathVariant&& path) |
| : Box(WTFMove(path)) |
| { |
| } |
| |
| inline StringView TextBox::text() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.text(); |
| }); |
| } |
| |
| inline unsigned TextBox::localStartOffset() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.localStartOffset(); |
| }); |
| } |
| |
| inline unsigned TextBox::localEndOffset() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.localEndOffset(); |
| }); |
| } |
| |
| inline unsigned TextBox::length() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.length(); |
| }); |
| } |
| |
| inline bool TextBox::isLastOnLine() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isLastOnLine(); |
| }); |
| } |
| |
| inline bool TextBox::isLast() const |
| { |
| return WTF::switchOn(m_pathVariant, [](auto& path) { |
| return path.isLast(); |
| }); |
| } |
| |
| } |
| } |