2 * Copyright (C) 2010, 2011 Apple Inc. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 #include "LayoutTypes.h"
30 #include <wtf/Vector.h>
35 WTF_MAKE_NONCOPYABLE(ColumnInfo); WTF_MAKE_FAST_ALLOCATED;
38 : m_desiredColumnWidth(0)
39 , m_desiredColumnCount(1)
40 , m_progressionAxis(InlineAxis)
41 , m_progressionIsReversed(false)
44 , m_minimumColumnHeight(0)
46 , m_maximumDistanceBetweenForcedBreaks(0)
47 , m_forcedBreakOffset(0)
48 , m_paginationUnit(Column)
52 LayoutUnit desiredColumnWidth() const { return m_desiredColumnWidth; }
53 void setDesiredColumnWidth(LayoutUnit width) { m_desiredColumnWidth = width; }
55 unsigned desiredColumnCount() const { return m_desiredColumnCount; }
56 void setDesiredColumnCount(unsigned count) { m_desiredColumnCount = count; }
58 enum Axis { InlineAxis, BlockAxis };
60 Axis progressionAxis() const { return m_progressionAxis; }
61 void setProgressionAxis(Axis progressionAxis) { m_progressionAxis = progressionAxis; }
63 bool progressionIsReversed() const { return m_progressionIsReversed; }
64 void setProgressionIsReversed(bool reversed) { m_progressionIsReversed = reversed; }
66 unsigned columnCount() const { return m_columnCount; }
67 LayoutUnit columnHeight() const { return m_columnHeight; }
69 // Set our count and height. This is enough info for a RenderBlock to compute page rects
71 void setColumnCountAndHeight(int count, LayoutUnit height)
73 m_columnCount = count;
74 m_columnHeight = height;
76 void setColumnHeight(LayoutUnit height) { m_columnHeight = height; }
78 void updateMinimumColumnHeight(LayoutUnit height) { m_minimumColumnHeight = std::max(height, m_minimumColumnHeight); }
79 LayoutUnit minimumColumnHeight() const { return m_minimumColumnHeight; }
81 int forcedBreaks() const { return m_forcedBreaks; }
82 LayoutUnit forcedBreakOffset() const { return m_forcedBreakOffset; }
83 LayoutUnit maximumDistanceBetweenForcedBreaks() const { return m_maximumDistanceBetweenForcedBreaks; }
84 void clearForcedBreaks()
87 m_maximumDistanceBetweenForcedBreaks = 0;
88 m_forcedBreakOffset = 0;
90 void addForcedBreak(LayoutUnit offsetFromFirstPage)
92 ASSERT(!m_columnHeight);
93 LayoutUnit distanceFromLastBreak = offsetFromFirstPage - m_forcedBreakOffset;
94 if (!distanceFromLastBreak)
97 m_maximumDistanceBetweenForcedBreaks = std::max(m_maximumDistanceBetweenForcedBreaks, distanceFromLastBreak);
98 m_forcedBreakOffset = offsetFromFirstPage;
101 enum PaginationUnit { Column, Page };
102 PaginationUnit paginationUnit() const { return m_paginationUnit; }
103 void setPaginationUnit(PaginationUnit paginationUnit) { m_paginationUnit = paginationUnit; }
106 LayoutUnit m_desiredColumnWidth;
107 unsigned m_desiredColumnCount;
108 Axis m_progressionAxis;
109 bool m_progressionIsReversed;
111 unsigned m_columnCount;
112 LayoutUnit m_columnHeight;
113 LayoutUnit m_minimumColumnHeight;
114 int m_forcedBreaks; // FIXME: We will ultimately need to cache more information to balance around forced breaks properly.
115 LayoutUnit m_maximumDistanceBetweenForcedBreaks;
116 LayoutUnit m_forcedBreakOffset;
117 PaginationUnit m_paginationUnit;