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