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/*
* Copyright (C) 2013 Adobe Systems Incorporated. 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 THE COPYRIGHT HOLDERS AND 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 THE
* COPYRIGHT HOLDER OR 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.
*/
#ifndef LineWidth_h
#define LineWidth_h
#include "platform/LayoutUnit.h"
namespace WebCore {
class FloatingObject;
class RenderBlock;
class RenderObject;
class RenderRubyRun;
class RenderBlockFlow;
struct LineSegment;
enum IndentTextOrNot { DoNotIndentText, IndentText };
class LineWidth {
public:
LineWidth(RenderBlockFlow&, bool isFirstLine, IndentTextOrNot shouldIndentText);
bool fitsOnLine() const { return currentWidth() <= (m_availableWidth + LayoutUnit::epsilon()); }
bool fitsOnLine(float extra) const { return currentWidth() + extra <= (m_availableWidth + LayoutUnit::epsilon()); }
float currentWidth() const { return m_committedWidth + m_uncommittedWidth; }
// FIXME: We should eventually replace these three functions by ones that work on a higher abstraction.
float uncommittedWidth() const { return m_uncommittedWidth; }
float committedWidth() const { return m_committedWidth; }
float availableWidth() const { return m_availableWidth; }
void updateAvailableWidth(LayoutUnit minimumHeight = 0);
void shrinkAvailableWidthForNewFloatIfNeeded(FloatingObject*);
void addUncommittedWidth(float delta) { m_uncommittedWidth += delta; }
void commit();
void applyOverhang(RenderRubyRun*, RenderObject* startRenderer, RenderObject* endRenderer);
void fitBelowFloats();
void updateCurrentShapeSegment();
bool shouldIndentText() const { return m_shouldIndentText == IndentText; }
private:
void computeAvailableWidthFromLeftAndRight();
RenderBlockFlow& m_block;
float m_uncommittedWidth;
float m_committedWidth;
float m_overhangWidth; // The amount by which |m_availableWidth| has been inflated to account for possible contraction due to ruby overhang.
float m_left;
float m_right;
float m_availableWidth;
const LineSegment* m_segment;
bool m_isFirstLine;
IndentTextOrNot m_shouldIndentText;
};
}
#endif // LineWidth_h
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