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1 /* | 1 /* |
2 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> | 2 * Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org> |
3 * Copyright (C) 2009 Apple Inc. All rights reserved. | 3 * Copyright (C) 2009 Apple Inc. All rights reserved. |
4 * | 4 * |
5 * This library is free software; you can redistribute it and/or | 5 * This library is free software; you can redistribute it and/or |
6 * modify it under the terms of the GNU Library General Public | 6 * modify it under the terms of the GNU Library General Public |
7 * License as published by the Free Software Foundation; either | 7 * License as published by the Free Software Foundation; either |
8 * version 2 of the License, or (at your option) any later version. | 8 * version 2 of the License, or (at your option) any later version. |
9 * | 9 * |
10 * This library is distributed in the hope that it will be useful, | 10 * This library is distributed in the hope that it will be useful, |
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of | 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 * Library General Public License for more details. | 13 * Library General Public License for more details. |
14 * | 14 * |
15 * You should have received a copy of the GNU Library General Public License | 15 * You should have received a copy of the GNU Library General Public License |
16 * along with this library; see the file COPYING.LIB. If not, write to | 16 * along with this library; see the file COPYING.LIB. If not, write to |
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, | 17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
18 * Boston, MA 02110-1301, USA. | 18 * Boston, MA 02110-1301, USA. |
19 */ | 19 */ |
20 | 20 |
21 #ifndef LayoutSVGTextPath_h | 21 #ifndef LayoutSVGTextPath_h |
22 #define LayoutSVGTextPath_h | 22 #define LayoutSVGTextPath_h |
23 | 23 |
24 #include "core/layout/svg/LayoutSVGInline.h" | 24 #include "core/layout/svg/LayoutSVGInline.h" |
25 | 25 |
26 namespace blink { | 26 namespace blink { |
27 | 27 |
28 // This class maps a 1D location in the "path space"; [0, path length] to a | |
29 // (2D) point on the path and provides the normal (angle from the x-axis) for | |
30 // said point. | |
31 class PathPositionMapper { | |
fs
2016/02/10 19:34:50
I guess this could go in platform/, but with this
| |
32 USING_FAST_MALLOC(PathPositionMapper); | |
33 public: | |
34 static PassOwnPtr<PathPositionMapper> create(const Path& path) | |
35 { | |
36 return adoptPtr(new PathPositionMapper(path)); | |
37 } | |
38 | |
39 enum PositionType { | |
40 OnPath, | |
41 BeforePath, | |
42 AfterPath, | |
43 }; | |
44 PositionType pointAndNormalAtLength(float length, FloatPoint&, float& angle) ; | |
45 float length() const { return m_pathLength; } | |
46 | |
47 private: | |
48 explicit PathPositionMapper(const Path&); | |
49 | |
50 Path::PositionCalculator m_positionCalculator; | |
51 float m_pathLength; | |
52 }; | |
53 | |
28 class LayoutSVGTextPath final : public LayoutSVGInline { | 54 class LayoutSVGTextPath final : public LayoutSVGInline { |
29 public: | 55 public: |
30 explicit LayoutSVGTextPath(Element*); | 56 explicit LayoutSVGTextPath(Element*); |
31 | 57 |
32 Path layoutPath() const; | 58 PassOwnPtr<PathPositionMapper> layoutPath() const; |
33 float calculateStartOffset(float) const; | 59 float calculateStartOffset(float) const; |
34 | 60 |
35 bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override; | 61 bool isChildAllowed(LayoutObject*, const ComputedStyle&) const override; |
36 | 62 |
37 bool isOfType(LayoutObjectType type) const override { return type == LayoutO bjectSVGTextPath || LayoutSVGInline::isOfType(type); } | 63 bool isOfType(LayoutObjectType type) const override { return type == LayoutO bjectSVGTextPath || LayoutSVGInline::isOfType(type); } |
38 | 64 |
39 const char* name() const override { return "LayoutSVGTextPath"; } | 65 const char* name() const override { return "LayoutSVGTextPath"; } |
40 }; | 66 }; |
41 | 67 |
42 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGTextPath, isSVGTextPath()); | 68 DEFINE_LAYOUT_OBJECT_TYPE_CASTS(LayoutSVGTextPath, isSVGTextPath()); |
43 | 69 |
44 } // namespace blink | 70 } // namespace blink |
45 | 71 |
46 #endif // LayoutSVGTextPath_h | 72 #endif // LayoutSVGTextPath_h |
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