| /* |
| * 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 |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include "InlineRect.h" |
| #include "LayoutBox.h" |
| #include "TextFlags.h" |
| #include <unicode/ubidi.h> |
| #include <wtf/OptionSet.h> |
| |
| namespace WebCore { |
| namespace InlineDisplay { |
| |
| struct Box { |
| WTF_MAKE_STRUCT_FAST_ALLOCATED; |
| struct Text { |
| WTF_MAKE_STRUCT_FAST_ALLOCATED; |
| public: |
| Text(size_t position, size_t length, const String& originalContent, String adjustedContentToRender = String(), bool hasHyphen = false); |
| |
| size_t start() const { return m_start; } |
| size_t end() const { return start() + length(); } |
| size_t length() const { return m_length; } |
| StringView originalContent() const { return StringView(m_originalContent).substring(m_start, m_length); } |
| StringView renderedContent() const { return m_adjustedContentToRender.isNull() ? originalContent() : m_adjustedContentToRender; } |
| |
| bool hasHyphen() const { return m_hasHyphen; } |
| |
| private: |
| size_t m_start { 0 }; |
| size_t m_length { 0 }; |
| bool m_hasHyphen { false }; |
| String m_originalContent; |
| String m_adjustedContentToRender; |
| }; |
| |
| enum class Type { |
| Text, |
| Ellipsis, |
| SoftLineBreak, |
| LineBreakBox, |
| AtomicInlineLevelBox, |
| NonRootInlineBox, |
| RootInlineBox, |
| GenericInlineLevelBox |
| }; |
| struct Expansion; |
| enum class PositionWithinInlineLevelBox { |
| First = 1 << 0, |
| Last = 1 << 1 |
| }; |
| Box(size_t lineIndex, Type, const Layout::Box&, UBiDiLevel, const Layout::InlineRect&, const Layout::InlineRect& inkOverflow, Expansion, std::optional<Text> = std::nullopt, bool hasContent = true, OptionSet<PositionWithinInlineLevelBox> = { PositionWithinInlineLevelBox::First, PositionWithinInlineLevelBox::Last }); |
| |
| bool isText() const { return m_type == Type::Text; } |
| bool isEllipsis() const { return m_type == Type::Ellipsis; } |
| bool isSoftLineBreak() const { return m_type == Type::SoftLineBreak; } |
| bool isLineBreakBox() const { return m_type == Type::LineBreakBox; } |
| bool isLineBreak() const { return isSoftLineBreak() || isLineBreakBox(); } |
| bool isAtomicInlineLevelBox() const { return m_type == Type::AtomicInlineLevelBox; } |
| bool isInlineBox() const { return isNonRootInlineBox() || isRootInlineBox(); } |
| bool isNonRootInlineBox() const { return m_type == Type::NonRootInlineBox; } |
| bool isRootInlineBox() const { return m_type == Type::RootInlineBox; } |
| bool isGenericInlineLevelBox() const { return m_type == Type::GenericInlineLevelBox; } |
| bool isInlineLevelBox() const { return isAtomicInlineLevelBox() || isLineBreakBox() || isInlineBox() || isGenericInlineLevelBox(); } |
| bool isNonRootInlineLevelBox() const { return isInlineLevelBox() && !isRootInlineBox(); } |
| Type type() const { return m_type; } |
| |
| UBiDiLevel bidiLevel() const { return m_bidiLevel; } |
| |
| bool hasContent() const { return m_hasContent; } |
| |
| const Layout::InlineRect& logicalRect() const { return m_logicalRect; } |
| const Layout::InlineRect& inkOverflow() const { return m_inkOverflow; } |
| |
| Layout::InlineLayoutUnit logicalTop() const { return logicalRect().top(); } |
| Layout::InlineLayoutUnit logicalBottom() const { return logicalRect().bottom(); } |
| Layout::InlineLayoutUnit logicalLeft() const { return logicalRect().left(); } |
| Layout::InlineLayoutUnit logicalRight() const { return logicalRect().right(); } |
| |
| Layout::InlineLayoutUnit logicalWidth() const { return logicalRect().width(); } |
| Layout::InlineLayoutUnit logicalHeight() const { return logicalRect().height(); } |
| |
| void moveVertically(Layout::InlineLayoutUnit offset) { m_logicalRect.moveVertically(offset); } |
| void moveHorizontally(Layout::InlineLayoutUnit offset) { m_logicalRect.moveHorizontally(offset); } |
| void adjustInkOverflow(const Layout::InlineRect& childBorderBox) { return m_inkOverflow.expandToContain(childBorderBox); } |
| void truncate(Layout::InlineLayoutUnit truncatedwidth = 0.f); |
| |
| std::optional<Text>& text() { return m_text; } |
| const std::optional<Text>& text() const { return m_text; } |
| |
| struct Expansion { |
| ExpansionBehavior behavior { DefaultExpansion }; |
| Layout::InlineLayoutUnit horizontalExpansion { 0 }; |
| }; |
| Expansion expansion() const { return m_expansion; } |
| |
| const Layout::Box& layoutBox() const { return m_layoutBox; } |
| const RenderStyle& style() const { return !lineIndex() ? layoutBox().firstLineStyle() : layoutBox().style(); } |
| |
| size_t lineIndex() const { return m_lineIndex; } |
| // These functions tell you whether this display box is the first/last for the associated inline level box (Layout::Box) and not whether it's the first/last box on the line. |
| // (e.g. always true for atomic boxes, but inline boxes spanning over multiple lines can produce individual first/last boxes). |
| bool isFirstBox() const { return m_isFirstWithinInlineLevelBox; } |
| bool isLastBox() const { return m_isLastWithinInlineLevelBox; } |
| |
| private: |
| const size_t m_lineIndex { 0 }; |
| const Type m_type { Type::GenericInlineLevelBox }; |
| CheckedRef<const Layout::Box> m_layoutBox; |
| UBiDiLevel m_bidiLevel { UBIDI_DEFAULT_LTR }; |
| Layout::InlineRect m_logicalRect; |
| Layout::InlineRect m_inkOverflow; |
| bool m_hasContent : 1; |
| bool m_isFirstWithinInlineLevelBox : 1; |
| bool m_isLastWithinInlineLevelBox : 1; |
| Expansion m_expansion; |
| std::optional<Text> m_text; |
| }; |
| |
| inline Box::Box(size_t lineIndex, Type type, const Layout::Box& layoutBox, UBiDiLevel bidiLevel, const Layout::InlineRect& logicalRect, const Layout::InlineRect& inkOverflow, Expansion expansion, std::optional<Text> text, bool hasContent, OptionSet<PositionWithinInlineLevelBox> positionWithinInlineLevelBox) |
| : m_lineIndex(lineIndex) |
| , m_type(type) |
| , m_layoutBox(layoutBox) |
| , m_bidiLevel(bidiLevel) |
| , m_logicalRect(logicalRect) |
| , m_inkOverflow(inkOverflow) |
| , m_hasContent(hasContent) |
| , m_isFirstWithinInlineLevelBox(positionWithinInlineLevelBox.contains(PositionWithinInlineLevelBox::First)) |
| , m_isLastWithinInlineLevelBox(positionWithinInlineLevelBox.contains(PositionWithinInlineLevelBox::Last)) |
| , m_expansion(expansion) |
| , m_text(text) |
| { |
| } |
| |
| inline Box::Text::Text(size_t start, size_t length, const String& originalContent, String adjustedContentToRender, bool hasHyphen) |
| : m_start(start) |
| , m_length(length) |
| , m_hasHyphen(hasHyphen) |
| , m_originalContent(originalContent) |
| , m_adjustedContentToRender(adjustedContentToRender) |
| { |
| } |
| |
| inline void Box::truncate(Layout::InlineLayoutUnit truncatedwidth) |
| { |
| m_logicalRect.setWidth(truncatedwidth); |
| m_inkOverflow.setRight(m_logicalRect.right()); |
| } |
| |
| } |
| } |
| #endif |