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Side by Side Diff: gfx/font.h

Issue 6246027: Move src/gfx/ to src/ui/gfx... (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: '' Created 9 years, 10 months ago
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1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2006-2008 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 GFX_FONT_H_ 5 #ifndef GFX_FONT_H_
6 #define GFX_FONT_H_ 6 #define GFX_FONT_H_
7 #pragma once 7 #pragma once
8 8
9 #include <string> 9 #include "ui/gfx/font.h"
10 10 // TODO(sail): remove this file once all includes have been updated.
11 #include "base/ref_counted.h"
12 #include "base/string16.h"
13 #include "gfx/native_widget_types.h"
14
15 namespace gfx {
16
17 class PlatformFont;
18
19 // Font provides a wrapper around an underlying font. Copy and assignment
20 // operators are explicitly allowed, and cheap.
21 class Font {
22 public:
23 // The following constants indicate the font style.
24 enum FontStyle {
25 NORMAL = 0,
26 BOLD = 1,
27 ITALIC = 2,
28 UNDERLINED = 4,
29 };
30
31 // Creates a font with the default name and style.
32 Font();
33
34 // Creates a font that is a clone of another font object.
35 Font(const Font& other);
36 gfx::Font& operator=(const Font& other);
37
38 // Creates a font from the specified native font.
39 explicit Font(NativeFont native_font);
40
41 // Construct a Font object with the specified PlatformFont object. The Font
42 // object takes ownership of the PlatformFont object.
43 explicit Font(PlatformFont* platform_font);
44
45 // Creates a font with the specified name and size.
46 Font(const string16& font_name, int font_size);
47
48 ~Font();
49
50 // Returns a new Font derived from the existing font.
51 // size_deta is the size to add to the current font. For example, a value
52 // of 5 results in a font 5 units bigger than this font.
53 Font DeriveFont(int size_delta) const;
54
55 // Returns a new Font derived from the existing font.
56 // size_delta is the size to add to the current font. See the single
57 // argument version of this method for an example.
58 // The style parameter specifies the new style for the font, and is a
59 // bitmask of the values: BOLD, ITALIC and UNDERLINED.
60 Font DeriveFont(int size_delta, int style) const;
61
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
64 // greater than just ascent + descent. Specifically, the Windows and Mac
65 // implementations include leading and the Linux one does not. This may
66 // need to be revisited in the future.
67 int GetHeight() const;
68
69 // Returns the baseline, or ascent, of the font.
70 int GetBaseline() const;
71
72 // Returns the average character width for the font.
73 int GetAverageCharacterWidth() const;
74
75 // Returns the number of horizontal pixels needed to display the specified
76 // string.
77 int GetStringWidth(const string16& text) const;
78
79 // Returns the expected number of horizontal pixels needed to display the
80 // specified length of characters. Call GetStringWidth() to retrieve the
81 // actual number.
82 int GetExpectedTextWidth(int length) const;
83
84 // Returns the style of the font.
85 int GetStyle() const;
86
87 // Returns the font name.
88 string16 GetFontName() const;
89
90 // Returns the font size in pixels.
91 int GetFontSize() const;
92
93 // Returns the native font handle.
94 // Lifetime lore:
95 // Windows: This handle is owned by the Font object, and should not be
96 // destroyed by the caller.
97 // Mac: Caller must release this object.
98 // Gtk: This handle is created on demand, and must be freed by calling
99 // pango_font_description_free() when the caller is done using it.
100 NativeFont GetNativeFont() const;
101
102 // Raw access to the underlying platform font implementation. Can be
103 // static_cast to a known implementation type if needed.
104 PlatformFont* platform_font() const { return platform_font_.get(); }
105
106 private:
107 // Wrapped platform font implementation.
108 scoped_refptr<PlatformFont> platform_font_;
109 };
110
111 } // namespace gfx
112 11
113 #endif // GFX_FONT_H_ 12 #endif // GFX_FONT_H_
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