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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)
43 , m_minimumColumnHeight(0)
45 , m_maximumDistanceBetweenForcedBreaks(0)
46 , m_forcedBreakOffset(0)
50 LayoutUnit desiredColumnWidth() const { return m_desiredColumnWidth; }
51 void setDesiredColumnWidth(LayoutUnit width) { m_desiredColumnWidth = width; }
53 unsigned desiredColumnCount() const { return m_desiredColumnCount; }
54 void setDesiredColumnCount(unsigned count) { m_desiredColumnCount = count; }
56 enum Axis { InlineAxis, BlockAxis };
58 Axis progressionAxis() const { return m_progressionAxis; }
59 void setProgressionAxis(Axis progressionAxis) { m_progressionAxis = progressionAxis; }
61 unsigned columnCount() const { return m_columnCount; }
62 LayoutUnit columnHeight() const { return m_columnHeight; }
64 // Set our count and height. This is enough info for a RenderBlock to compute page rects
66 void setColumnCountAndHeight(int count, LayoutUnit height)
68 m_columnCount = count;
69 m_columnHeight = height;
71 void setColumnHeight(LayoutUnit height) { m_columnHeight = height; }
73 void updateMinimumColumnHeight(LayoutUnit height) { m_minimumColumnHeight = std::max(height, m_minimumColumnHeight); }
74 LayoutUnit minimumColumnHeight() const { return m_minimumColumnHeight; }
76 int forcedBreaks() const { return m_forcedBreaks; }
77 int forcedBreakOffset() const { return m_forcedBreakOffset; }
78 int maximumDistanceBetweenForcedBreaks() const { return m_maximumDistanceBetweenForcedBreaks; }
79 void clearForcedBreaks()
82 m_maximumDistanceBetweenForcedBreaks = 0;
83 m_forcedBreakOffset = 0;
85 void addForcedBreak(int offsetFromFirstPage)
87 ASSERT(!m_columnHeight);
88 int distanceFromLastBreak = offsetFromFirstPage - m_forcedBreakOffset;
89 if (!distanceFromLastBreak)
92 m_maximumDistanceBetweenForcedBreaks = std::max(m_maximumDistanceBetweenForcedBreaks, distanceFromLastBreak);
93 m_forcedBreakOffset = offsetFromFirstPage;
97 LayoutUnit m_desiredColumnWidth;
98 unsigned m_desiredColumnCount;
99 Axis m_progressionAxis;
101 unsigned m_columnCount;
102 LayoutUnit m_columnHeight;
103 LayoutUnit m_minimumColumnHeight;
104 int m_forcedBreaks; // FIXME: We will ultimately need to cache more information to balance around forced breaks properly.
105 int m_maximumDistanceBetweenForcedBreaks;
106 int m_forcedBreakOffset;