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1 /* | 1 /* |
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved. | 2 * Copyright (C) Research In Motion Limited 2010. 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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27 #include "wtf/text/Unicode.h" | 27 #include "wtf/text/Unicode.h" |
28 | 28 |
29 namespace blink { | 29 namespace blink { |
30 | 30 |
31 class Font; | 31 class Font; |
32 class LayoutObject; | 32 class LayoutObject; |
33 class ComputedStyle; | 33 class ComputedStyle; |
34 class SVGComputedStyle; | 34 class SVGComputedStyle; |
35 class SVGTextMetrics; | 35 class SVGTextMetrics; |
36 | 36 |
37 // Helper class used by SVGTextLayoutEngine to handle 'alignment-baseline' / 'do
minant-baseline' and 'baseline-shift'. | 37 // Helper class used by SVGTextLayoutEngine to handle 'alignment-baseline' / |
| 38 // 'dominant-baseline' and 'baseline-shift'. |
38 class SVGTextLayoutEngineBaseline { | 39 class SVGTextLayoutEngineBaseline { |
39 STACK_ALLOCATED(); | 40 STACK_ALLOCATED(); |
40 WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngineBaseline); | 41 WTF_MAKE_NONCOPYABLE(SVGTextLayoutEngineBaseline); |
41 | 42 |
42 public: | 43 public: |
43 SVGTextLayoutEngineBaseline(const Font&, float effectiveZoom); | 44 SVGTextLayoutEngineBaseline(const Font&, float effectiveZoom); |
44 | 45 |
45 float calculateBaselineShift(const ComputedStyle&) const; | 46 float calculateBaselineShift(const ComputedStyle&) const; |
46 float calculateAlignmentBaselineShift(bool isVerticalText, | 47 float calculateAlignmentBaselineShift(bool isVerticalText, |
47 LineLayoutItem) const; | 48 LineLayoutItem) const; |
48 | 49 |
49 private: | 50 private: |
50 EAlignmentBaseline dominantBaselineToAlignmentBaseline(bool isVerticalText, | 51 EAlignmentBaseline dominantBaselineToAlignmentBaseline(bool isVerticalText, |
51 LineLayoutItem) const; | 52 LineLayoutItem) const; |
52 | 53 |
53 const Font& m_font; | 54 const Font& m_font; |
54 | 55 |
55 // Everything we read from the m_font's font descriptor during layout is scale
d by the effective | 56 // Everything we read from the m_font's font descriptor during layout is |
56 // zoom, as fonts always are in computed style. Since layout inside SVG takes
place in unzoomed | 57 // scaled by the effective zoom, as fonts always are in computed style. Since |
57 // coordinates we have to compensate for zoom when reading values from the fon
t descriptor. | 58 // layout inside SVG takes place in unzoomed coordinates we have to compensate |
| 59 // for zoom when reading values from the font descriptor. |
58 float m_effectiveZoom; | 60 float m_effectiveZoom; |
59 }; | 61 }; |
60 | 62 |
61 } // namespace blink | 63 } // namespace blink |
62 | 64 |
63 #endif | 65 #endif |
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