117 lines
4.7 KiB
C++
117 lines
4.7 KiB
C++
/*
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* Copyright (C) 2010, 2011 Apple Inc. 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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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED 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 ColumnInfo {
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WTF_MAKE_NONCOPYABLE(ColumnInfo); WTF_MAKE_FAST_ALLOCATED;
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public:
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ColumnInfo()
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: m_desiredColumnWidth(0)
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, m_desiredColumnCount(1)
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, m_progressionIsInline(true)
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, m_progressionIsReversed(false)
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, m_columnCount(1)
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, m_columnHeight(0)
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, m_minimumColumnHeight(0)
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, m_forcedBreaks(0)
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, m_maximumDistanceBetweenForcedBreaks(0)
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, m_forcedBreakOffset(0)
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, m_paginationUnit(Column)
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{
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}
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LayoutUnit desiredColumnWidth() const { return m_desiredColumnWidth; }
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void setDesiredColumnWidth(LayoutUnit width) { m_desiredColumnWidth = width; }
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unsigned desiredColumnCount() const { return m_desiredColumnCount; }
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void setDesiredColumnCount(unsigned count) { m_desiredColumnCount = count; }
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bool progressionIsInline() const { return m_progressionIsInline; }
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void setProgressionIsInline(bool progressionIsInline) { m_progressionIsInline = progressionIsInline; }
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bool progressionIsReversed() const { return m_progressionIsReversed; }
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void setProgressionIsReversed(bool reversed) { m_progressionIsReversed = reversed; }
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unsigned columnCount() const { return m_columnCount; }
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LayoutUnit columnHeight() const { return m_columnHeight; }
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// Set our count and height. This is enough info for a RenderBlock to compute page rects
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// dynamically.
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void setColumnCountAndHeight(int count, LayoutUnit height)
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{
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m_columnCount = count;
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m_columnHeight = height;
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}
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void setColumnHeight(LayoutUnit height) { m_columnHeight = height; }
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void updateMinimumColumnHeight(LayoutUnit height) { m_minimumColumnHeight = std::max(height, m_minimumColumnHeight); }
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LayoutUnit minimumColumnHeight() const { return m_minimumColumnHeight; }
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int forcedBreaks() const { return m_forcedBreaks; }
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LayoutUnit forcedBreakOffset() const { return m_forcedBreakOffset; }
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LayoutUnit maximumDistanceBetweenForcedBreaks() const { return m_maximumDistanceBetweenForcedBreaks; }
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void clearForcedBreaks()
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{
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m_forcedBreaks = 0;
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m_maximumDistanceBetweenForcedBreaks = 0;
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m_forcedBreakOffset = 0;
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}
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void addForcedBreak(LayoutUnit offsetFromFirstPage)
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{
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ASSERT(!m_columnHeight);
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LayoutUnit distanceFromLastBreak = offsetFromFirstPage - m_forcedBreakOffset;
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if (!distanceFromLastBreak)
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return;
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m_forcedBreaks++;
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m_maximumDistanceBetweenForcedBreaks = std::max(m_maximumDistanceBetweenForcedBreaks, distanceFromLastBreak);
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m_forcedBreakOffset = offsetFromFirstPage;
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}
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enum PaginationUnit { Column, Page };
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PaginationUnit paginationUnit() const { return m_paginationUnit; }
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void setPaginationUnit(PaginationUnit paginationUnit) { m_paginationUnit = paginationUnit; }
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private:
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LayoutUnit m_desiredColumnWidth;
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unsigned m_desiredColumnCount;
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bool m_progressionIsInline;
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bool m_progressionIsReversed;
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unsigned m_columnCount;
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LayoutUnit m_columnHeight;
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LayoutUnit m_minimumColumnHeight;
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int m_forcedBreaks; // FIXME: We will ultimately need to cache more information to balance around forced breaks properly.
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LayoutUnit m_maximumDistanceBetweenForcedBreaks;
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LayoutUnit m_forcedBreakOffset;
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PaginationUnit m_paginationUnit;
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};
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} // namespace WebCore
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