ui/gfx: Allow for font-specific rendering settings.

ui/gfx/font_list.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef UI_GFX_FONT_LIST_H_
 #define UI_GFX_FONT_LIST_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/gfx_export.h"
 
 namespace gfx {
 
 class FontListImpl;
+struct FontRenderParams;
 
 // FontList represents a list of fonts and provides metrics which are common
 // in the fonts.  FontList is copyable and it's quite cheap to copy.
 //
 // The format of font description string complies with that of Pango detailed at
 // http://developer.gnome.org/pango/stable/pango-Fonts.html#pango-font-description-from-string
 // The format is "<FONT_FAMILY_LIST>,[STYLES] <SIZE>" where
 //     FONT_FAMILY_LIST is a comma-separated list of font family names,
 //     STYLES is a space-separated list of style names ("Bold" and "Italic"),
 //     SIZE is a font size in pixel with the suffix "px".
@@ skipping 76 matching lines @@
   int GetFontStyle() const;
 
   // Returns a string representing font names, styles, and size. If the FontList
   // is initialized by a vector of Font, use the first font's style and size
   // for the description.
   const std::string& GetFontDescriptionString() const;
 
   // Returns the font size in pixels.
   int GetFontSize() const;
 
+  // Returns an object describing how the primary font should be rendered.

[msw, 2014/07/12 00:27:31]

Can we avoid this? I'd rather users explicitly call GetPrimaryFont if they need
the params for that font. (Otherwise users might mistakenly apply the primary
font's settings to other fonts in the list)

[Daniel Erat, 2014/07/12 01:55:32]

sure, i just did this to match the style of the rest of FontList

[msw, 2014/07/12 02:26:40]

Yeah, it's a gray area, but good to avoid non-obvious implicit primary font use.

+  const FontRenderParams& GetFontRenderParams() const;
+
   // Returns the Font vector.
   const std::vector<Font>& GetFonts() const;
 
   // Returns the first font in the list.
   const Font& GetPrimaryFont() const;
 
  private:
   explicit FontList(FontListImpl* impl);
 
   static const scoped_refptr<FontListImpl>& GetDefaultImpl();
 
   scoped_refptr<FontListImpl> impl_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_FONT_LIST_H_