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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.
*/
#include "config.h"
#include "LineWidth.h"
#include "RenderBlockFlow.h"
#include "RenderBlockInlines.h"
#include "RenderBoxInlines.h"
#include "RenderStyleInlines.h"
namespace WebCore {
LineWidth::LineWidth(RenderBlockFlow& block)
: m_block(block)
{
updateAvailableWidth();
}
bool LineWidth::fitsOnLine(bool ignoringTrailingSpace) const
{
return ignoringTrailingSpace ? fitsOnLineExcludingTrailingCollapsedWhitespace() : fitsOnLineIncludingExtraWidth(0);
}
bool LineWidth::fitsOnLineIncludingExtraWidth(float extra) const
{
auto adjustedCurrentWidth = currentWidth() + extra;
return adjustedCurrentWidth < m_availableWidth || WTF::areEssentiallyEqual(adjustedCurrentWidth, m_availableWidth);
}
bool LineWidth::fitsOnLineExcludingTrailingWhitespace(float extra) const
{
auto adjustedCurrentWidth = currentWidth() - m_trailingWhitespaceWidth + extra;
return adjustedCurrentWidth < m_availableWidth || WTF::areEssentiallyEqual(adjustedCurrentWidth, m_availableWidth);
}
bool LineWidth::fitsOnLineExcludingTrailingCollapsedWhitespace() const
{
auto adjustedCurrentWidth = currentWidth() - m_trailingCollapsedWhitespaceWidth;
return adjustedCurrentWidth < m_availableWidth || WTF::areEssentiallyEqual(adjustedCurrentWidth, m_availableWidth);
}
void LineWidth::updateAvailableWidth()
{
LayoutUnit height = m_block.logicalHeight();
auto lineHeight = std::max(0_lu, m_block.lineHeight());
m_left = m_block.logicalLeftOffsetForLine(height, lineHeight);
m_right = m_block.logicalRightOffsetForLine(height, lineHeight);
computeAvailableWidthFromLeftAndRight();
}
void LineWidth::commit()
{
m_committedWidth += m_uncommittedWidth;
m_uncommittedWidth = 0;
if (m_hasUncommittedReplaced) {
m_hasCommittedReplaced = true;
m_hasUncommittedReplaced = false;
}
m_hasCommitted = true;
}
inline static float availableWidthAtOffset(const RenderBlockFlow& block, const LayoutUnit& offset,
float& newLineLeft, float& newLineRight, const LayoutUnit& lineHeight = 0)
{
newLineLeft = block.logicalLeftOffsetForLine(offset, lineHeight);
newLineRight = block.logicalRightOffsetForLine(offset, lineHeight);
return std::max(0.0f, newLineRight - newLineLeft);
}
void LineWidth::updateLineDimension(LayoutUnit newLineTop, LayoutUnit newLineWidth, float newLineLeft, float newLineRight)
{
if (newLineWidth <= m_availableWidth)
return;
m_block.setLogicalHeight(newLineTop);
m_availableWidth = newLineWidth;
m_left = newLineLeft;
m_right = newLineRight;
}
void LineWidth::setTrailingWhitespaceWidth(float collapsedWhitespace, float borderPaddingMargin)
{
m_trailingCollapsedWhitespaceWidth = collapsedWhitespace;
m_trailingWhitespaceWidth = collapsedWhitespace + borderPaddingMargin;
}
void LineWidth::computeAvailableWidthFromLeftAndRight()
{
m_availableWidth = std::max<float>(0, m_right - m_left);
}
}
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