108 lines
4.2 KiB
C++
108 lines
4.2 KiB
C++
/*
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* Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "LayoutUnit.h"
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namespace WebCore {
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class FloatingObject;
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class RenderBlockFlow;
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class RenderObject;
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class RenderRubyRun;
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class RenderStyle;
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struct LineSegment;
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enum IndentTextOrNot { DoNotIndentText, IndentText };
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class LineWidth {
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public:
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LineWidth(RenderBlockFlow&, bool isFirstLine, IndentTextOrNot shouldIndentText);
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bool fitsOnLine(bool ignoringTrailingSpace = false) const;
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bool fitsOnLineIncludingExtraWidth(float extra) const;
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bool fitsOnLineExcludingTrailingWhitespace(float extra) const;
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float currentWidth() const { return m_committedWidth + m_uncommittedWidth; }
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// FIXME: We should eventually replace these three functions by ones that work on a higher abstraction.
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float uncommittedWidth() const { return m_uncommittedWidth; }
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float committedWidth() const { return m_committedWidth; }
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float availableWidth() const { return m_availableWidth; }
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float logicalLeftOffset() const { return m_left; }
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bool hasCommitted() const { return m_hasCommitted; }
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bool hasCommittedReplaced() const { return m_hasCommittedReplaced; }
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void updateAvailableWidth(LayoutUnit minimumHeight = 0_lu);
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void shrinkAvailableWidthForNewFloatIfNeeded(const FloatingObject&);
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void addUncommittedWidth(float delta)
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{
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m_uncommittedWidth += delta;
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}
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void addUncommittedReplacedWidth(float delta)
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{
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addUncommittedWidth(delta);
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m_hasUncommittedReplaced = true;
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}
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void commit();
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void applyOverhang(const RenderRubyRun&, RenderObject* startRenderer, RenderObject* endRenderer);
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void fitBelowFloats(bool isFirstLine = false);
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void setTrailingWhitespaceWidth(float collapsedWhitespace, float borderPaddingMargin = 0);
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IndentTextOrNot shouldIndentText() const { return m_shouldIndentText; }
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bool isFirstLine() const { return m_isFirstLine; }
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private:
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void computeAvailableWidthFromLeftAndRight();
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bool fitsOnLineExcludingTrailingCollapsedWhitespace() const;
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void updateLineDimension(LayoutUnit newLineTop, LayoutUnit newLineWidth, float newLineLeft, float newLineRight);
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void wrapNextToShapeOutside(bool isFirstLine);
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RenderBlockFlow& m_block;
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float m_uncommittedWidth { 0 };
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float m_committedWidth { 0 };
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float m_overhangWidth { 0 }; // The amount by which |m_availableWidth| has been inflated to account for possible contraction due to ruby overhang.
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float m_trailingWhitespaceWidth { 0 };
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float m_trailingCollapsedWhitespaceWidth { 0 };
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float m_left { 0 };
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float m_right { 0 };
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float m_availableWidth { 0 };
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bool m_isFirstLine { true };
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bool m_hasCommitted { false };
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bool m_hasCommittedReplaced { false };
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bool m_hasUncommittedReplaced { false };
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IndentTextOrNot m_shouldIndentText;
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};
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IndentTextOrNot requiresIndent(bool isFirstLine, bool isAfterHardLineBreak, const RenderStyle&);
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} // namespace WebCore
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