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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef UI_GFX_PLATFORM_FONT_PANGO_H_ | |
| 6 #define UI_GFX_PLATFORM_FONT_PANGO_H_ | |
| 7 | |
| 8 #include <string> | |
| 9 | |
| 10 #include "base/compiler_specific.h" | |
| 11 #include "base/memory/scoped_ptr.h" | |
| 12 #include "skia/ext/refptr.h" | |
| 13 #include "third_party/skia/include/core/SkRefCnt.h" | |
| 14 #include "ui/gfx/font_render_params.h" | |
| 15 #include "ui/gfx/platform_font.h" | |
| 16 | |
| 17 class SkTypeface; | |
| 18 class SkPaint; | |
| 19 | |
| 20 namespace gfx { | |
| 21 | |
| 22 class GFX_EXPORT PlatformFontPango : public PlatformFont { | |
| 23 public: | |
| 24 PlatformFontPango(); | |
| 25 explicit PlatformFontPango(NativeFont native_font); | |
| 26 PlatformFontPango(const std::string& font_name, int font_size_pixels); | |
| 27 | |
| 28 // Converts |gfx_font| to a new pango font. Free the returned font with | |
| 29 // pango_font_description_free(). | |
| 30 static PangoFontDescription* PangoFontFromGfxFont(const gfx::Font& gfx_font); | |
| 31 | |
| 32 // Resets and reloads the cached system font used by the default constructor. | |
| 33 // This function is useful when the system font has changed, for example, when | |
| 34 // the locale has changed. | |
| 35 static void ReloadDefaultFont(); | |
| 36 | |
| 37 #if defined(OS_CHROMEOS) | |
| 38 // Sets the default font. |font_description| is a Pango font description that | |
| 39 // will be passed to pango_font_description_from_string(). | |
| 40 static void SetDefaultFontDescription(const std::string& font_description); | |
| 41 #endif | |
| 42 | |
| 43 // Overridden from PlatformFont: | |
| 44 virtual Font DeriveFont(int size_delta, int style) const override; | |
| 45 virtual int GetHeight() const override; | |
| 46 virtual int GetBaseline() const override; | |
| 47 virtual int GetCapHeight() const override; | |
| 48 virtual int GetExpectedTextWidth(int length) const override; | |
| 49 virtual int GetStyle() const override; | |
| 50 virtual std::string GetFontName() const override; | |
| 51 virtual std::string GetActualFontNameForTesting() const override; | |
| 52 virtual int GetFontSize() const override; | |
| 53 virtual const FontRenderParams& GetFontRenderParams() const override; | |
| 54 virtual NativeFont GetNativeFont() const override; | |
| 55 | |
| 56 private: | |
| 57 // Create a new instance of this object with the specified properties. Called | |
| 58 // from DeriveFont. | |
| 59 PlatformFontPango(const skia::RefPtr<SkTypeface>& typeface, | |
| 60 const std::string& name, | |
| 61 int size_pixels, | |
| 62 int style, | |
| 63 const FontRenderParams& params); | |
| 64 virtual ~PlatformFontPango(); | |
| 65 | |
| 66 // Initializes this object based on the passed-in details. If |typeface| is | |
| 67 // empty, a new typeface will be loaded. | |
| 68 void InitFromDetails( | |
| 69 const skia::RefPtr<SkTypeface>& typeface, | |
| 70 const std::string& font_family, | |
| 71 int font_size_pixels, | |
| 72 int style, | |
| 73 const FontRenderParams& params); | |
| 74 | |
| 75 // Initializes this object as a copy of another PlatformFontPango. | |
| 76 void InitFromPlatformFont(const PlatformFontPango* other); | |
| 77 | |
| 78 // Potentially slow call to get pango metrics (average width). | |
| 79 void InitPangoMetrics(); | |
| 80 | |
| 81 // Setup a Skia context to use the current typeface. | |
| 82 void PaintSetup(SkPaint* paint) const; | |
| 83 | |
| 84 // Make |this| a copy of |other|. | |
| 85 void CopyFont(const Font& other); | |
| 86 | |
| 87 // The average width of a character, initialized and cached if needed. | |
| 88 double GetAverageWidth() const; | |
| 89 | |
| 90 skia::RefPtr<SkTypeface> typeface_; | |
| 91 | |
| 92 // Additional information about the face. | |
| 93 // Skia actually expects a family name and not a font name. | |
| 94 std::string font_family_; | |
| 95 int font_size_pixels_; | |
| 96 int style_; | |
| 97 | |
| 98 // Information describing how the font should be rendered. | |
| 99 FontRenderParams font_render_params_; | |
| 100 | |
| 101 // Cached metrics, generated at construction. | |
| 102 int ascent_pixels_; | |
| 103 int height_pixels_; | |
| 104 int cap_height_pixels_; | |
| 105 | |
| 106 // The pango metrics are much more expensive so we wait until we need them | |
| 107 // to compute them. | |
| 108 bool pango_metrics_inited_; | |
| 109 double average_width_pixels_; | |
| 110 | |
| 111 // The default font, used for the default constructor. | |
| 112 static Font* default_font_; | |
| 113 | |
| 114 #if defined(OS_CHROMEOS) | |
| 115 // A Pango font description. | |
| 116 static std::string* default_font_description_; | |
| 117 #endif | |
| 118 | |
| 119 DISALLOW_COPY_AND_ASSIGN(PlatformFontPango); | |
| 120 }; | |
| 121 | |
| 122 } // namespace gfx | |
| 123 | |
| 124 #endif // UI_GFX_PLATFORM_FONT_PANGO_H_ | |
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Chromium Code Reviews
Issue 854713003:
More old files deletion. (Closed)
Base URL: https://github.com/domokit/mojo.git@master