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
36 namespace WebCore {
37
LineSegmentRange(const InlineIterator & start,const InlineIterator & end)38 LineSegmentRange::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
isEnabledFor(const RenderBlock * renderer)44 bool 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
updateSegmentsForLine(LayoutSize lineOffset,LayoutUnit lineHeight)63 bool 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
updateSegmentsForLine(LayoutUnit lineTop,LayoutUnit lineHeight)73 bool 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
adjustLogicalLineTop(float minSegmentWidth)87 bool 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
shapeValue() const104 ShapeValue* ShapeInsideInfo::shapeValue() const
105 {
106 return m_renderer->style()->resolvedShapeInside();
107 }
108
computeFirstFitPositionForFloat(const LayoutSize floatSize) const109 LayoutUnit 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