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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 |
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 * Library General Public License for more details. | 12 * Library General Public License for more details. |
13 * | 13 * |
14 * You should have received a copy of the GNU Library General Public License | 14 * You should have received a copy of the GNU Library General Public License |
15 * along with this library; see the file COPYING.LIB. If not, write to | 15 * along with this library; see the file COPYING.LIB. If not, write to |
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | 16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
17 * Boston, MA 02110-1301, USA. | 17 * Boston, MA 02110-1301, USA. |
18 */ | 18 */ |
19 | 19 |
20 #ifndef SVGTextChunkBuilder_h | 20 #ifndef SVGTextChunkBuilder_h |
21 #define SVGTextChunkBuilder_h | 21 #define SVGTextChunkBuilder_h |
22 | 22 |
23 #include "wtf/Allocator.h" | 23 #include "wtf/Allocator.h" |
24 #include "wtf/Vector.h" | 24 #include "wtf/Vector.h" |
25 | 25 |
26 namespace blink { | 26 namespace blink { |
27 | 27 |
28 class AffineTransform; | |
29 class SVGInlineTextBox; | 28 class SVGInlineTextBox; |
30 struct SVGTextFragment; | 29 struct SVGTextFragment; |
31 | 30 |
32 // SVGTextChunkBuilder performs the third layout phase for SVG text. | 31 // SVGTextChunkBuilder performs the third layout phase for SVG text. |
33 // | 32 // |
34 // Phase one built the layout information from the SVG DOM stored in the LayoutS
VGInlineText objects (SVGTextLayoutAttributes). | 33 // Phase one built the layout information from the SVG DOM stored in the LayoutS
VGInlineText objects (SVGTextLayoutAttributes). |
35 // Phase two performed the actual per-character layout, computing the final posi
tions for each character, stored in the SVGInlineTextBox objects (SVGTextFragmen
t). | 34 // Phase two performed the actual per-character layout, computing the final posi
tions for each character, stored in the SVGInlineTextBox objects (SVGTextFragmen
t). |
36 // Phase three performs all modifications that have to be applied to each indivi
dual text chunk (text-anchor & textLength). | 35 // Phase three performs all modifications that have to be applied to each indivi
dual text chunk (text-anchor & textLength). |
37 | 36 |
38 class SVGTextChunkBuilder { | 37 class SVGTextChunkBuilder { |
39 STACK_ALLOCATED(); | 38 STACK_ALLOCATED(); |
40 WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder); | 39 WTF_MAKE_NONCOPYABLE(SVGTextChunkBuilder); |
41 public: | 40 public: |
42 SVGTextChunkBuilder(); | 41 SVGTextChunkBuilder(); |
43 | 42 |
44 void processTextChunks(const Vector<SVGInlineTextBox*>&); | 43 void processTextChunks(const Vector<SVGInlineTextBox*>&); |
45 | 44 |
46 protected: | 45 protected: |
47 typedef Vector<SVGInlineTextBox*>::const_iterator BoxListConstIterator; | 46 typedef Vector<SVGInlineTextBox*>::const_iterator BoxListConstIterator; |
48 | 47 |
49 virtual void handleTextChunk(BoxListConstIterator boxStart, BoxListConstIter
ator boxEnd); | 48 virtual void handleTextChunk(BoxListConstIterator boxStart, BoxListConstIter
ator boxEnd); |
50 | 49 |
51 private: | 50 private: |
52 void processTextLengthSpacingCorrection(bool isVerticalText, float textLengt
hShift, Vector<SVGTextFragment>&, unsigned& atCharacter); | 51 void processTextLengthSpacingCorrection(bool isVerticalText, float textLengt
hShift, Vector<SVGTextFragment>&, unsigned& atCharacter); |
53 void applyTextLengthScaleAdjustment(const AffineTransform&, Vector<SVGTextFr
agment>&); | 52 void applyTextLengthScaleAdjustment(float textLengthScale, float textLengthB
ias, Vector<SVGTextFragment>&); |
54 void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift,
Vector<SVGTextFragment>&); | 53 void processTextAnchorCorrection(bool isVerticalText, float textAnchorShift,
Vector<SVGTextFragment>&); |
55 }; | 54 }; |
56 | 55 |
57 class SVGTextPathChunkBuilder final : public SVGTextChunkBuilder { | 56 class SVGTextPathChunkBuilder final : public SVGTextChunkBuilder { |
58 STACK_ALLOCATED(); | 57 STACK_ALLOCATED(); |
59 WTF_MAKE_NONCOPYABLE(SVGTextPathChunkBuilder); | 58 WTF_MAKE_NONCOPYABLE(SVGTextPathChunkBuilder); |
60 public: | 59 public: |
61 SVGTextPathChunkBuilder(); | 60 SVGTextPathChunkBuilder(); |
62 | 61 |
63 float totalLength() const { return m_totalLength; } | 62 float totalLength() const { return m_totalLength; } |
64 unsigned totalCharacters() const { return m_totalCharacters; } | 63 unsigned totalCharacters() const { return m_totalCharacters; } |
65 float totalTextAnchorShift() const { return m_totalTextAnchorShift; } | 64 float totalTextAnchorShift() const { return m_totalTextAnchorShift; } |
66 | 65 |
67 private: | 66 private: |
68 void handleTextChunk(BoxListConstIterator boxStart, BoxListConstIterator box
End) override; | 67 void handleTextChunk(BoxListConstIterator boxStart, BoxListConstIterator box
End) override; |
69 | 68 |
70 float m_totalLength; | 69 float m_totalLength; |
71 unsigned m_totalCharacters; | 70 unsigned m_totalCharacters; |
72 float m_totalTextAnchorShift; | 71 float m_totalTextAnchorShift; |
73 }; | 72 }; |
74 | 73 |
75 } // namespace blink | 74 } // namespace blink |
76 | 75 |
77 #endif | 76 #endif |
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