1/*
2 * Copyright (C) 2012 Adobe Systems Incorporated. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above
9 *    copyright notice, this list of conditions and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above
12 *    copyright notice, this list of conditions and the following
13 *    disclaimer in the documentation and/or other materials
14 *    provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER "AS IS" AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE
20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
21 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
22 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
23 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
25 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
26 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#ifndef ShapeInsideInfo_h
31#define ShapeInsideInfo_h
32
33#if ENABLE(CSS_SHAPES)
34
35#include "ShapeInfo.h"
36#include <wtf/PassOwnPtr.h>
37#include <wtf/Vector.h>
38
39namespace WebCore {
40
41class InlineIterator;
42class RenderBlock;
43class RenderObject;
44
45struct LineSegmentIterator {
46    RenderObject* root;
47    RenderObject* object;
48    unsigned offset;
49    LineSegmentIterator(RenderObject* root, RenderObject* object, unsigned offset)
50        : root(root)
51        , object(object)
52        , offset(offset)
53    {
54    }
55};
56
57struct LineSegmentRange {
58    LineSegmentIterator start;
59    LineSegmentIterator end;
60    LineSegmentRange(const InlineIterator& start, const InlineIterator& end);
61};
62
63typedef Vector<LineSegmentRange> SegmentRangeList;
64
65class ShapeInsideInfo : public ShapeInfo<RenderBlock, &RenderStyle::resolvedShapeInside, &Shape::getIncludedIntervals> {
66public:
67    static PassOwnPtr<ShapeInsideInfo> createInfo(const RenderBlock* renderer) { return adoptPtr(new ShapeInsideInfo(renderer)); }
68
69    static bool isEnabledFor(const RenderBlock* renderer);
70
71    virtual bool computeSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight) OVERRIDE
72    {
73        m_segmentRanges.clear();
74        return ShapeInfo<RenderBlock, &RenderStyle::resolvedShapeInside, &Shape::getIncludedIntervals>::computeSegmentsForLine(lineTop, lineHeight);
75    }
76
77    bool hasSegments() const
78    {
79        return lineOverlapsShapeBounds() && m_segments.size();
80    }
81    const SegmentList& segments() const
82    {
83        ASSERT(hasSegments());
84        return m_segments;
85    }
86    SegmentRangeList& segmentRanges() { return m_segmentRanges; }
87    const SegmentRangeList& segmentRanges() const { return m_segmentRanges; }
88    const LineSegment* currentSegment() const
89    {
90        if (!hasSegments())
91            return 0;
92        ASSERT(m_segmentRanges.size() < m_segments.size());
93        return &m_segments[m_segmentRanges.size()];
94    }
95    bool adjustLogicalLineTop(float minSegmentWidth);
96
97    void setNeedsLayout(bool value) { m_needsLayout = value; }
98    bool needsLayout() { return m_needsLayout; }
99
100protected:
101    virtual LayoutRect computedShapeLogicalBoundingBox() const OVERRIDE { return computedShape()->shapePaddingLogicalBoundingBox(); }
102
103private:
104    ShapeInsideInfo(const RenderBlock* renderer)
105    : ShapeInfo<RenderBlock, &RenderStyle::resolvedShapeInside, &Shape::getIncludedIntervals> (renderer)
106    , m_needsLayout(false)
107    { }
108
109    SegmentRangeList m_segmentRanges;
110    bool m_needsLayout:1;
111};
112
113}
114#endif
115#endif
116