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#include "config.h"
31#include "core/rendering/shapes/ShapeInsideInfo.h"
32
33#include "core/rendering/InlineIterator.h"
34#include "core/rendering/RenderBlock.h"
35
36namespace WebCore {
37
38LineSegmentRange::LineSegmentRange(const InlineIterator& start, const InlineIterator& end)
39    : start(start.root(), start.object(), start.offset())
40    , end(end.root(), end.object(), end.offset())
41    {
42    }
43
44bool ShapeInsideInfo::isEnabledFor(const RenderBlock* renderer)
45{
46    ShapeValue* shapeValue = renderer->style()->resolvedShapeInside();
47    if (!shapeValue)
48        return false;
49
50    switch (shapeValue->type()) {
51    case ShapeValue::Shape:
52        return shapeValue->shape() && shapeValue->shape()->type() != BasicShape::BasicShapeInsetRectangleType;
53    case ShapeValue::Image:
54        return shapeValue->isImageValid() && checkShapeImageOrigin(renderer->document(), *(shapeValue->image()->cachedImage()));
55    case ShapeValue::Box:
56    case ShapeValue::Outside:
57        return false;
58    }
59
60    return false;
61}
62
63bool ShapeInsideInfo::updateSegmentsForLine(LayoutSize lineOffset, LayoutUnit lineHeight)
64{
65    bool result = updateSegmentsForLine(lineOffset.height(), lineHeight);
66    for (size_t i = 0; i < m_segments.size(); i++) {
67        m_segments[i].logicalLeft -= lineOffset.width();
68        m_segments[i].logicalRight -= lineOffset.width();
69    }
70    return result;
71}
72
73bool ShapeInsideInfo::updateSegmentsForLine(LayoutUnit lineTop, LayoutUnit lineHeight)
74{
75    ASSERT(lineHeight >= 0);
76    m_shapeLineTop = lineTop - logicalTopOffset();
77    m_lineHeight = lineHeight;
78    m_segments.clear();
79    m_segmentRanges.clear();
80
81    if (lineOverlapsShapeBounds())
82        m_segments = computeSegmentsForLine(lineTop, lineHeight);
83
84    return m_segments.size();
85}
86
87bool ShapeInsideInfo::adjustLogicalLineTop(float minSegmentWidth)
88{
89    const Shape* shape = computedShape();
90    if (!shape || m_lineHeight <= 0 || logicalLineTop() > shapeLogicalBottom())
91        return false;
92
93    LayoutUnit newLineTop;
94    if (shape->firstIncludedIntervalLogicalTop(m_shapeLineTop, LayoutSize(minSegmentWidth, m_lineHeight), newLineTop)) {
95        if (newLineTop > m_shapeLineTop) {
96            m_shapeLineTop = newLineTop;
97            return true;
98        }
99    }
100
101    return false;
102}
103
104ShapeValue* ShapeInsideInfo::shapeValue() const
105{
106    return m_renderer->style()->resolvedShapeInside();
107}
108
109LayoutUnit ShapeInsideInfo::computeFirstFitPositionForFloat(const LayoutSize floatSize) const
110{
111    if (!computedShape() || !floatSize.width() || shapeLogicalBottom() < logicalLineTop())
112        return 0;
113
114    LayoutUnit firstFitPosition = 0;
115    if (computedShape()->firstIncludedIntervalLogicalTop(m_shapeLineTop, floatSize, firstFitPosition) && (m_shapeLineTop <= firstFitPosition))
116        return firstFitPosition;
117
118    return 0;
119}
120
121}
122