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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" |
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27 // | | ascent (baseline) +------------------+ | 27 // | | ascent (baseline) +------------------+ |
28 // | height | | cap height | | 28 // | height | | cap height | |
29 // | |-------------------+------------------+ | 29 // | |-------------------+------------------+ |
30 // | | descent (height - baseline) | | 30 // | | descent (height - baseline) | |
31 // +--------+--------------------------------------+ | 31 // +--------+--------------------------------------+ |
32 class GFX_EXPORT Font { | 32 class GFX_EXPORT Font { |
33 public: | 33 public: |
34 // The following constants indicate the font style. | 34 // The following constants indicate the font style. |
35 enum FontStyle { | 35 enum FontStyle { |
36 NORMAL = 0, | 36 NORMAL = 0, |
37 BOLD = 1, | 37 ITALIC = 1, |
38 ITALIC = 2, | 38 UNDERLINE = 2, |
39 UNDERLINE = 4, | 39 }; |
| 40 |
| 41 enum class Weight { |
| 42 INVALID = -1, |
| 43 THIN = 100, |
| 44 EXTRA_LIGHT = 200, |
| 45 LIGHT = 300, |
| 46 NORMAL = 400, |
| 47 MEDIUM = 500, |
| 48 SEMIBOLD = 600, |
| 49 BOLD = 700, |
| 50 EXTRA_BOLD = 800, |
| 51 BLACK = 900, |
40 }; | 52 }; |
41 | 53 |
42 // Creates a font with the default name and style. | 54 // Creates a font with the default name and style. |
43 Font(); | 55 Font(); |
44 | 56 |
45 // Creates a font that is a clone of another font object. | 57 // Creates a font that is a clone of another font object. |
46 Font(const Font& other); | 58 Font(const Font& other); |
47 Font& operator=(const Font& other); | 59 Font& operator=(const Font& other); |
48 | 60 |
49 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_IOS) | 61 #if defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_IOS) |
50 // Creates a font from the specified native font. | 62 // Creates a font from the specified native font. |
51 explicit Font(NativeFont native_font); | 63 explicit Font(NativeFont native_font); |
52 #endif | 64 #endif |
53 | 65 |
54 // Constructs a Font object with the specified PlatformFont object. The Font | 66 // Constructs a Font object with the specified PlatformFont object. The Font |
55 // object takes ownership of the PlatformFont object. | 67 // object takes ownership of the PlatformFont object. |
56 explicit Font(PlatformFont* platform_font); | 68 explicit Font(PlatformFont* platform_font); |
57 | 69 |
58 // Creates a font with the specified name in UTF-8 and size in pixels. | 70 // Creates a font with the specified name in UTF-8 and size in pixels. |
59 Font(const std::string& font_name, int font_size); | 71 Font(const std::string& font_name, int font_size); |
60 | 72 |
61 ~Font(); | 73 ~Font(); |
62 | 74 |
63 // Returns a new Font derived from the existing font. | 75 // Returns a new Font derived from the existing font. |
64 // |size_delta| is the size in pixels to add to the current font. For example, | 76 // |size_delta| is the size in pixels to add to the current font. For example, |
65 // a value of 5 results in a font 5 pixels bigger than this font. | 77 // a value of 5 results in a font 5 pixels bigger than this font. |
66 // The style parameter specifies the new style for the font, and is a | 78 // The style parameter specifies the new style for the font, and is a |
67 // bitmask of the values: BOLD, ITALIC and UNDERLINE. | 79 // bitmask of the values: ITALIC and UNDERLINE. |
68 Font Derive(int size_delta, int style) const; | 80 Font Derive(int size_delta, int style, gfx::Font::Weight weight) const; |
69 | 81 |
70 // Returns the number of vertical pixels needed to display characters from | 82 // Returns the number of vertical pixels needed to display characters from |
71 // the specified font. This may include some leading, i.e. height may be | 83 // the specified font. This may include some leading, i.e. height may be |
72 // greater than just ascent + descent. Specifically, the Windows and Mac | 84 // greater than just ascent + descent. Specifically, the Windows and Mac |
73 // implementations include leading and the Linux one does not. This may | 85 // implementations include leading and the Linux one does not. This may |
74 // need to be revisited in the future. | 86 // need to be revisited in the future. |
75 int GetHeight() const; | 87 int GetHeight() const; |
76 | 88 |
| 89 // Returns the font weight. |
| 90 gfx::Font::Weight GetWeight() const; |
| 91 |
77 // Returns the baseline, or ascent, of the font. | 92 // Returns the baseline, or ascent, of the font. |
78 int GetBaseline() const; | 93 int GetBaseline() const; |
79 | 94 |
80 // Returns the cap height of the font. | 95 // Returns the cap height of the font. |
81 int GetCapHeight() const; | 96 int GetCapHeight() const; |
82 | 97 |
83 // Returns the expected number of horizontal pixels needed to display the | 98 // Returns the expected number of horizontal pixels needed to display the |
84 // specified length of characters. Call gfx::GetStringWidth() to retrieve the | 99 // specified length of characters. Call gfx::GetStringWidth() to retrieve the |
85 // actual number. | 100 // actual number. |
86 int GetExpectedTextWidth(int length) const; | 101 int GetExpectedTextWidth(int length) const; |
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111 | 126 |
112 // Raw access to the underlying platform font implementation. Can be | 127 // Raw access to the underlying platform font implementation. Can be |
113 // static_cast to a known implementation type if needed. | 128 // static_cast to a known implementation type if needed. |
114 PlatformFont* platform_font() const { return platform_font_.get(); } | 129 PlatformFont* platform_font() const { return platform_font_.get(); } |
115 | 130 |
116 private: | 131 private: |
117 // Wrapped platform font implementation. | 132 // Wrapped platform font implementation. |
118 scoped_refptr<PlatformFont> platform_font_; | 133 scoped_refptr<PlatformFont> platform_font_; |
119 }; | 134 }; |
120 | 135 |
| 136 #ifndef NDEBUG |
| 137 GFX_EXPORT std::ostream& operator<<(std::ostream& stream, |
| 138 const gfx::Font::Weight weight); |
| 139 #endif |
| 140 |
121 } // namespace gfx | 141 } // namespace gfx |
122 | 142 |
123 #endif // UI_GFX_FONT_H_ | 143 #endif // UI_GFX_FONT_H_ |
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