ui/gfx/platform_font_mac.h

   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_MAC_H_
   6 #define UI_GFX_PLATFORM_FONT_MAC_H_
   7
   8 #include "base/compiler_specific.h"
   9 #include "base/mac/scoped_nsobject.h"
  10 #include "ui/gfx/font_render_params.h"
  11 #include "ui/gfx/platform_font.h"
  12
  13 namespace gfx {
  14
  15 class PlatformFontMac : public PlatformFont {
  16  public:
  17   PlatformFontMac();
  18   explicit PlatformFontMac(NativeFont native_font);
  19   PlatformFontMac(const std::string& font_name,
  20                   int font_size);
  21
  22   // Overridden from PlatformFont:
  23   Font DeriveFont(int size_delta, int style) const override;
  24   int GetHeight() const override;
  25   int GetBaseline() const override;
  26   int GetCapHeight() const override;
  27   int GetExpectedTextWidth(int length) const override;
  28   int GetStyle() const override;
  29   std::string GetFontName() const override;
  30   std::string GetActualFontNameForTesting() const override;
  31   int GetFontSize() const override;
  32   const FontRenderParams& GetFontRenderParams() const override;
  33   NativeFont GetNativeFont() const override;
  34
  35  private:
  36   PlatformFontMac(const std::string& font_name, int font_size, int font_style);
  37   ~PlatformFontMac() override;
  38
  39   // Calculates and caches the font metrics and inits |render_params_|.
  40   void CalculateMetricsAndInitRenderParams();
  41
  42   // The NSFont instance for this object. If this object was constructed from an
  43   // NSFont instance, this holds that NSFont instance. Otherwise this NSFont
  44   // instance is constructed from the name, size, and style, and if there is no
  45   // active font that matched those criteria, this object may be nil.
  46   base::scoped_nsobject<NSFont> native_font_;
  47
  48   // The name/size/style trio that specify the font. Initialized in the
  49   // constructors.
  50   std::string font_name_;  // Corresponds to -[NSFont fontFamily].
  51   int font_size_;
  52   int font_style_;
  53
  54   // Cached metrics, generated in CalculateMetrics().
  55   int height_;
  56   int ascent_;
  57   int cap_height_;
  58   int average_width_;
  59
  60   // Details about how the font should be rendered.
  61   FontRenderParams render_params_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(PlatformFontMac);
  64 };
  65
  66 }  // namespace gfx
  67
  68 #endif  // UI_GFX_PLATFORM_FONT_MAC_H_