| /* |
| * 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 |
| |
| #if ENABLE(LAYOUT_FORMATTING_CONTEXT) |
| |
| #include "FormattingConstraints.h" |
| #include "InlineContentBreaker.h" |
| #include "InlineFormattingState.h" |
| #include "InlineLine.h" |
| |
| namespace WebCore { |
| namespace Layout { |
| |
| class FloatingContext; |
| struct LineCandidate; |
| |
| class LineBuilder { |
| public: |
| LineBuilder(InlineFormattingContext&, FloatingState&, HorizontalConstraints rootHorizontalConstraints, const InlineItems&, std::optional<IntrinsicWidthMode> = std::nullopt); |
| LineBuilder(const InlineFormattingContext&, const InlineItems&, std::optional<IntrinsicWidthMode>); |
| |
| struct InlineItemRange { |
| bool isEmpty() const { return start == end; } |
| size_t size() const { return end - start; } |
| size_t start { 0 }; |
| size_t end { 0 }; |
| }; |
| using FloatList = Vector<const Box*>; |
| struct LineContent { |
| InlineItemRange inlineItemRange; |
| size_t partialTrailingContentLength { 0 }; |
| std::optional<InlineLayoutUnit> overflowLogicalWidth; |
| const FloatList& floats; |
| bool hasIntrusiveFloat { false }; |
| InlineLayoutPoint logicalTopLeft; |
| InlineLayoutUnit lineLogicalWidth { 0 }; |
| InlineLayoutUnit contentLogicalWidth { 0 }; |
| InlineLayoutUnit hangingWhitespaceWidth { 0 }; |
| bool isLastLineWithInlineContent { true }; |
| size_t nonSpanningInlineLevelBoxCount { 0 }; |
| Vector<int32_t> visualOrderList; |
| const Line::RunList& runs; |
| }; |
| LineContent layoutInlineContent(const InlineItemRange&, size_t partialLeadingContentLength, std::optional<InlineLayoutUnit> overflowingLogicalWidth, const InlineRect& initialLineLogicalRect, bool isFirstLine); |
| |
| struct IntrinsicContent { |
| InlineItemRange inlineItemRange; |
| InlineLayoutUnit logicalWidth { 0 }; |
| const FloatList& floats; |
| }; |
| IntrinsicContent computedIntrinsicWidth(const InlineItemRange&, bool isFirstLine); |
| |
| private: |
| void candidateContentForLine(LineCandidate&, size_t inlineItemIndex, const InlineItemRange& needsLayoutRange, InlineLayoutUnit currentLogicalRight); |
| size_t nextWrapOpportunity(size_t startIndex, const LineBuilder::InlineItemRange& layoutRange) const; |
| |
| struct Result { |
| InlineContentBreaker::IsEndOfLine isEndOfLine { InlineContentBreaker::IsEndOfLine::No }; |
| struct CommittedContentCount { |
| size_t value { 0 }; |
| bool isRevert { false }; |
| }; |
| CommittedContentCount committedCount { }; |
| size_t partialTrailingContentLength { 0 }; |
| std::optional<InlineLayoutUnit> overflowLogicalWidth { }; |
| }; |
| struct UsedConstraints { |
| InlineRect logicalRect; |
| bool isConstrainedByFloat { false }; |
| }; |
| UsedConstraints initialConstraintsForLine(const InlineRect& initialLineLogicalRect, bool isFirstLine) const; |
| std::optional<HorizontalConstraints> floatConstraints(const InlineRect& lineLogicalRect) const; |
| |
| void handleFloatContent(const InlineItem&); |
| Result handleInlineContent(InlineContentBreaker&, const InlineItemRange& needsLayoutRange, const LineCandidate&); |
| size_t rebuildLine(const InlineItemRange& needsLayoutRange, const InlineItem& lastInlineItemToAdd); |
| size_t rebuildLineForTrailingSoftHyphen(const InlineItemRange& layoutRange); |
| void commitPartialContent(const InlineContentBreaker::ContinuousContent::RunList&, const InlineContentBreaker::Result::PartialTrailingContent&); |
| void initialize(const UsedConstraints&, bool isFirstLine, size_t leadingInlineTextItemIndex, size_t partialLeadingContentLength, std::optional<InlineLayoutUnit> overflowingLogicalWidth); |
| struct CommittedContent { |
| size_t inlineItemCount { 0 }; |
| size_t partialTrailingContentLength { 0 }; |
| std::optional<InlineLayoutUnit> overflowLogicalWidth { }; |
| }; |
| CommittedContent placeInlineContent(const InlineItemRange&); |
| InlineItemRange close(const InlineItemRange& needsLayoutRange, const CommittedContent&); |
| |
| InlineLayoutUnit inlineItemWidth(const InlineItem&, InlineLayoutUnit contentLogicalLeft) const; |
| bool isLastLineWithInlineContent(const InlineItemRange& lineRange, size_t lastInlineItemIndex, bool hasPartialTrailingContent) const; |
| |
| std::optional<IntrinsicWidthMode> intrinsicWidthMode() const { return m_intrinsicWidthMode; } |
| bool isInIntrinsicWidthMode() const { return !!intrinsicWidthMode(); } |
| |
| const InlineFormattingContext& formattingContext() const { return m_inlineFormattingContext; } |
| InlineFormattingState* formattingState() { return m_inlineFormattingState; } |
| FloatingState* floatingState() { return m_floatingState; } |
| const FloatingState* floatingState() const { return m_floatingState; } |
| const ContainerBox& root() const; |
| const LayoutState& layoutState() const; |
| |
| private: |
| bool m_isFirstLine { false }; |
| std::optional<IntrinsicWidthMode> m_intrinsicWidthMode; |
| const InlineFormattingContext& m_inlineFormattingContext; |
| InlineFormattingState* m_inlineFormattingState { nullptr }; |
| FloatingState* m_floatingState { nullptr }; |
| std::optional<HorizontalConstraints> m_rootHorizontalConstraints; |
| |
| Line m_line; |
| InlineRect m_lineLogicalRect; |
| const InlineItems& m_inlineItems; |
| FloatList m_floats; |
| std::optional<InlineTextItem> m_partialLeadingTextItem; |
| std::optional<InlineLayoutUnit> m_overflowingLogicalWidth; |
| Vector<const InlineItem*> m_wrapOpportunityList; |
| Vector<InlineItem> m_lineSpanningInlineBoxes; |
| unsigned m_successiveHyphenatedLineCount { 0 }; |
| bool m_contentIsConstrainedByFloat { false }; |
| }; |
| |
| } |
| } |
| #endif |