ui/gfx/linux_font_delegate.h

   1 // Copyright 2013 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_LINUX_FONT_DELEGATE_H_
   6 #define UI_GFX_LINUX_FONT_DELEGATE_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "ui/gfx/font_render_params.h"
  12 #include "ui/gfx/gfx_export.h"
  13
  14 namespace gfx {
  15
  16 // Allows a Linux platform-specific overriding of font preferences.
  17 class GFX_EXPORT LinuxFontDelegate {
  18  public:
  19   virtual ~LinuxFontDelegate() {}
  20
  21   // Sets the dynamically loaded singleton that provides font preferences.
  22   // This pointer is not owned, and if this method is called a second time,
  23   // the first instance is not deleted.
  24   static void SetInstance(LinuxFontDelegate* instance);
  25
  26   // Returns a LinuxFontDelegate instance for the toolkit used in
  27   // the user's desktop environment.
  28   //
  29   // Can return NULL, in case no toolkit has been set. (For example, if we're
  30   // running with the "--ash" flag.)
  31   static const LinuxFontDelegate* instance();
  32
  33   // Returns the default font rendering settings.
  34   virtual FontRenderParams GetDefaultFontRenderParams() const = 0;
  35
  36   // Returns details about the default UI font. |style_out| holds a bitfield of
  37   // gfx::Font::Style values.
  38   virtual void GetDefaultFontDescription(
  39       std::string* family_out,
  40       int* size_pixels_out,
  41       int* style_out,
  42       FontRenderParams* params_out) const = 0;
  43 };
  44
  45 }  // namespace gfx
  46
  47 #endif  // UI_GFX_LINUX_FONT_DELEGATE_H_