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Side by Side Diff: ui/gfx/font.h

Issue 11535014: Replace StyleRange with BreakList; update RenderText, etc. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Address comments. Created 7 years, 10 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef UI_GFX_FONT_H_ 5 #ifndef UI_GFX_FONT_H_
6 #define UI_GFX_FONT_H_ 6 #define UI_GFX_FONT_H_
7 7
8 #include <string> 8 #include <string>
9 9
10 #include "base/memory/ref_counted.h" 10 #include "base/memory/ref_counted.h"
11 #include "base/string16.h" 11 #include "base/string16.h"
12 #include "ui/base/ui_export.h" 12 #include "ui/base/ui_export.h"
13 #include "ui/gfx/native_widget_types.h" 13 #include "ui/gfx/native_widget_types.h"
14 14
15 namespace gfx { 15 namespace gfx {
16 16
17 class PlatformFont; 17 class PlatformFont;
18 18
19 // Font provides a wrapper around an underlying font. Copy and assignment 19 // Font provides a wrapper around an underlying font. Copy and assignment
20 // operators are explicitly allowed, and cheap. 20 // operators are explicitly allowed, and cheap.
21 class UI_EXPORT Font { 21 class UI_EXPORT Font {
22 public: 22 public:
23 // The following constants indicate the font style. 23 // The following constants indicate the font style.
24 enum FontStyle { 24 enum FontStyle {
25 NORMAL = 0, 25 NORMAL = 0,
26 BOLD = 1, 26 BOLD = 1,
27 ITALIC = 2, 27 ITALIC = 2,
28 UNDERLINED = 4, 28 UNDERLINE = 4,
29 }; 29 };
30 30
31 // Creates a font with the default name and style. 31 // Creates a font with the default name and style.
32 Font(); 32 Font();
33 33
34 // Creates a font that is a clone of another font object. 34 // Creates a font that is a clone of another font object.
35 Font(const Font& other); 35 Font(const Font& other);
36 gfx::Font& operator=(const Font& other); 36 gfx::Font& operator=(const Font& other);
37 37
38 // Creates a font from the specified native font. 38 // Creates a font from the specified native font.
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49 49
50 // Returns a new Font derived from the existing font. 50 // Returns a new Font derived from the existing font.
51 // |size_deta| is the size in pixels to add to the current font. For example, 51 // |size_deta| is the size in pixels to add to the current font. For example,
52 // a value of 5 results in a font 5 pixels bigger than this font. 52 // a value of 5 results in a font 5 pixels bigger than this font.
53 Font DeriveFont(int size_delta) const; 53 Font DeriveFont(int size_delta) const;
54 54
55 // Returns a new Font derived from the existing font. 55 // Returns a new Font derived from the existing font.
56 // |size_delta| is the size in pixels to add to the current font. See the 56 // |size_delta| is the size in pixels to add to the current font. See the
57 // single argument version of this method for an example. 57 // single argument version of this method for an example.
58 // The style parameter specifies the new style for the font, and is a 58 // The style parameter specifies the new style for the font, and is a
59 // bitmask of the values: BOLD, ITALIC and UNDERLINED. 59 // bitmask of the values: BOLD, ITALIC and UNDERLINE.
60 Font DeriveFont(int size_delta, int style) const; 60 Font DeriveFont(int size_delta, int style) const;
61 61
62 // Returns the number of vertical pixels needed to display characters from 62 // Returns the number of vertical pixels needed to display characters from
63 // the specified font. This may include some leading, i.e. height may be 63 // the specified font. This may include some leading, i.e. height may be
64 // greater than just ascent + descent. Specifically, the Windows and Mac 64 // greater than just ascent + descent. Specifically, the Windows and Mac
65 // implementations include leading and the Linux one does not. This may 65 // implementations include leading and the Linux one does not. This may
66 // need to be revisited in the future. 66 // need to be revisited in the future.
67 int GetHeight() const; 67 int GetHeight() const;
68 68
69 // Returns the baseline, or ascent, of the font. 69 // Returns the baseline, or ascent, of the font.
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105 PlatformFont* platform_font() const { return platform_font_.get(); } 105 PlatformFont* platform_font() const { return platform_font_.get(); }
106 106
107 private: 107 private:
108 // Wrapped platform font implementation. 108 // Wrapped platform font implementation.
109 scoped_refptr<PlatformFont> platform_font_; 109 scoped_refptr<PlatformFont> platform_font_;
110 }; 110 };
111 111
112 } // namespace gfx 112 } // namespace gfx
113 113
114 #endif // UI_GFX_FONT_H_ 114 #endif // UI_GFX_FONT_H_
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