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/*
* Copyright (C) 2010, 2011 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. ``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
* 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
#include "LayoutUnit.h"
namespace WebCore {
class ColumnInfo {
WTF_MAKE_NONCOPYABLE(ColumnInfo); WTF_MAKE_FAST_ALLOCATED;
public:
ColumnInfo()
: m_desiredColumnWidth(0)
, m_desiredColumnCount(1)
, m_progressionIsInline(true)
, m_progressionIsReversed(false)
, m_columnCount(1)
, m_columnHeight(0)
, m_minimumColumnHeight(0)
, m_forcedBreaks(0)
, m_maximumDistanceBetweenForcedBreaks(0)
, m_forcedBreakOffset(0)
, m_paginationUnit(Column)
{
}
LayoutUnit desiredColumnWidth() const { return m_desiredColumnWidth; }
void setDesiredColumnWidth(LayoutUnit width) { m_desiredColumnWidth = width; }
unsigned desiredColumnCount() const { return m_desiredColumnCount; }
void setDesiredColumnCount(unsigned count) { m_desiredColumnCount = count; }
bool progressionIsInline() const { return m_progressionIsInline; }
void setProgressionIsInline(bool progressionIsInline) { m_progressionIsInline = progressionIsInline; }
bool progressionIsReversed() const { return m_progressionIsReversed; }
void setProgressionIsReversed(bool reversed) { m_progressionIsReversed = reversed; }
unsigned columnCount() const { return m_columnCount; }
LayoutUnit columnHeight() const { return m_columnHeight; }
// Set our count and height. This is enough info for a RenderBlock to compute page rects
// dynamically.
void setColumnCountAndHeight(int count, LayoutUnit height)
{
m_columnCount = count;
m_columnHeight = height;
}
void setColumnHeight(LayoutUnit height) { m_columnHeight = height; }
void updateMinimumColumnHeight(LayoutUnit height) { m_minimumColumnHeight = std::max(height, m_minimumColumnHeight); }
LayoutUnit minimumColumnHeight() const { return m_minimumColumnHeight; }
int forcedBreaks() const { return m_forcedBreaks; }
LayoutUnit forcedBreakOffset() const { return m_forcedBreakOffset; }
LayoutUnit maximumDistanceBetweenForcedBreaks() const { return m_maximumDistanceBetweenForcedBreaks; }
void clearForcedBreaks()
{
m_forcedBreaks = 0;
m_maximumDistanceBetweenForcedBreaks = 0;
m_forcedBreakOffset = 0;
}
void addForcedBreak(LayoutUnit offsetFromFirstPage)
{
ASSERT(!m_columnHeight);
LayoutUnit distanceFromLastBreak = offsetFromFirstPage - m_forcedBreakOffset;
if (!distanceFromLastBreak)
return;
m_forcedBreaks++;
m_maximumDistanceBetweenForcedBreaks = std::max(m_maximumDistanceBetweenForcedBreaks, distanceFromLastBreak);
m_forcedBreakOffset = offsetFromFirstPage;
}
enum PaginationUnit { Column, Page };
PaginationUnit paginationUnit() const { return m_paginationUnit; }
void setPaginationUnit(PaginationUnit paginationUnit) { m_paginationUnit = paginationUnit; }
private:
LayoutUnit m_desiredColumnWidth;
unsigned m_desiredColumnCount;
bool m_progressionIsInline;
bool m_progressionIsReversed;
unsigned m_columnCount;
LayoutUnit m_columnHeight;
LayoutUnit m_minimumColumnHeight;
int m_forcedBreaks; // FIXME: We will ultimately need to cache more information to balance around forced breaks properly.
LayoutUnit m_maximumDistanceBetweenForcedBreaks;
LayoutUnit m_forcedBreakOffset;
PaginationUnit m_paginationUnit;
};
} // namespace WebCore