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1 /* | 1 /* |
2 * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved. | 2 * Copyright (C) Research In Motion Limited 2010-2012. All rights reserved. |
3 * | 3 * |
4 * This library is free software; you can redistribute it and/or | 4 * This library is free software; you can redistribute it and/or |
5 * modify it under the terms of the GNU Library General Public | 5 * modify it under the terms of the GNU Library General Public |
6 * License as published by the Free Software Foundation; either | 6 * License as published by the Free Software Foundation; either |
7 * version 2 of the License, or (at your option) any later version. | 7 * version 2 of the License, or (at your option) any later version. |
8 * | 8 * |
9 * This library is distributed in the hope that it will be useful, | 9 * This library is distributed in the hope that it will be useful, |
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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36 // It extracts the x/y/dx/dy/rotate values from the SVGTextPositioningElements i
n the DOM. | 36 // It extracts the x/y/dx/dy/rotate values from the SVGTextPositioningElements i
n the DOM. |
37 // These values are propagated to the corresponding RenderSVGInlineText renderer
s. | 37 // These values are propagated to the corresponding RenderSVGInlineText renderer
s. |
38 // The first layout phase only extracts the relevant information needed in Rende
rBlockLineLayout | 38 // The first layout phase only extracts the relevant information needed in Rende
rBlockLineLayout |
39 // to create the InlineBox tree based on text chunk boundaries & BiDi informatio
n. | 39 // to create the InlineBox tree based on text chunk boundaries & BiDi informatio
n. |
40 // The second layout phase is carried out by SVGTextLayoutEngine. | 40 // The second layout phase is carried out by SVGTextLayoutEngine. |
41 | 41 |
42 class SVGTextLayoutAttributesBuilder { | 42 class SVGTextLayoutAttributesBuilder { |
43 WTF_MAKE_NONCOPYABLE(SVGTextLayoutAttributesBuilder); | 43 WTF_MAKE_NONCOPYABLE(SVGTextLayoutAttributesBuilder); |
44 public: | 44 public: |
45 SVGTextLayoutAttributesBuilder(); | 45 SVGTextLayoutAttributesBuilder(); |
46 void buildLayoutAttributesForWholeTree(RenderSVGText*); | 46 bool buildLayoutAttributesForForSubtree(RenderSVGText*); |
47 void buildLayoutAttributesForTextRenderer(RenderSVGInlineText*); | 47 void buildLayoutAttributesForTextRenderer(RenderSVGInlineText*); |
48 | 48 |
49 void rebuildMetricsForWholeTree(RenderSVGText*); | |
50 void rebuildMetricsForTextRenderer(RenderSVGInlineText*); | 49 void rebuildMetricsForTextRenderer(RenderSVGInlineText*); |
51 | 50 |
52 // Invoked whenever the underlying DOM tree changes, so that m_textPositions
is rebuild. | 51 // Invoked whenever the underlying DOM tree changes, so that m_textPositions
is rebuild. |
53 void clearTextPositioningElements() { m_textPositions.clear(); } | 52 void clearTextPositioningElements() { m_textPositions.clear(); } |
| 53 unsigned numberOfTextPositioningElements() const { return m_textPositions.si
ze(); } |
54 | 54 |
55 private: | 55 private: |
56 struct TextPosition { | 56 struct TextPosition { |
57 TextPosition(SVGTextPositioningElement* newElement = 0, unsigned newStar
t = 0, unsigned newLength = 0) | 57 TextPosition(SVGTextPositioningElement* newElement = 0, unsigned newStar
t = 0, unsigned newLength = 0) |
58 : element(newElement) | 58 : element(newElement) |
59 , start(newStart) | 59 , start(newStart) |
60 , length(newLength) | 60 , length(newLength) |
61 { | 61 { |
62 } | 62 } |
63 | 63 |
64 SVGTextPositioningElement* element; | 64 SVGTextPositioningElement* element; |
65 unsigned start; | 65 unsigned start; |
66 unsigned length; | 66 unsigned length; |
67 }; | 67 }; |
68 | 68 |
69 bool buildLayoutAttributesIfNeeded(RenderSVGText*); | 69 void buildCharacterDataMap(RenderSVGText*); |
70 void collectTextPositioningElements(RenderObject*, const UChar*& lastCharact
er); | 70 void collectTextPositioningElements(RenderObject*, const UChar*& lastCharact
er); |
71 void buildLayoutAttributes(RenderSVGText*); | |
72 void fillCharacterDataMap(const TextPosition&); | 71 void fillCharacterDataMap(const TextPosition&); |
73 | 72 |
74 private: | 73 private: |
75 unsigned m_textLength; | 74 unsigned m_textLength; |
76 Vector<TextPosition> m_textPositions; | 75 Vector<TextPosition> m_textPositions; |
77 SVGCharacterDataMap m_characterDataMap; | 76 SVGCharacterDataMap m_characterDataMap; |
78 SVGTextMetricsBuilder m_metricsBuilder; | 77 SVGTextMetricsBuilder m_metricsBuilder; |
79 }; | 78 }; |
80 | 79 |
81 } // namespace WebCore | 80 } // namespace WebCore |
82 | 81 |
83 #endif // ENABLE(SVG) | 82 #endif // ENABLE(SVG) |
84 #endif | 83 #endif |
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