Allow various font weights in gfx.

ui/gfx/font_list_impl.h

 // Copyright 2014 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_IMPL_H_
 #define UI_GFX_FONT_LIST_IMPL_H_
 
 #include <string>
 #include <vector>
 
 #include "base/memory/ref_counted.h"
+#include "ui/gfx/font.h"
 
 namespace gfx {
 
-class Font;
-
 // FontListImpl is designed to provide the implementation of FontList and
 // intended to be used only from FontList.  You must not use this class
 // directly.
 //
 // FontListImpl represents a list of fonts either in the form of Font vector or
 // in the form of a string representing font names, styles, and size.
 //
 // FontListImpl could be initialized either way without conversion to the other
 // form. The conversion to the other form is done only when asked to get the
 // other form.
 //
 // For the format of font description string, see font_list.h for details.
 class FontListImpl : public base::RefCounted<FontListImpl> {
  public:
   // Creates a font list from a string representing font names, styles, and
   // size.
   explicit FontListImpl(const std::string& font_description_string);
 
-  // Creates a font list from font names, styles and size.
+  // Creates a font list from font names, styles, size and weight.
   FontListImpl(const std::vector<std::string>& font_names,
                int font_style,
-               int font_size);
+               int font_size,
+               Font::Weight font_weight);
 
   // Creates a font list from a Font vector.
   // All fonts in this vector should have the same style and size.
   explicit FontListImpl(const std::vector<Font>& fonts);
 
   // Creates a font list from a Font.
   explicit FontListImpl(const Font& font);
 
   // Returns a new FontListImpl with the same font names but resized and the
-  // given style. |size_delta| is the size in pixels to add to the current font
-  // size. |font_style| specifies the new style, which is a bitmask of the
-  // values: Font::BOLD, Font::ITALIC and Font::UNDERLINE.
-  FontListImpl* Derive(int size_delta, int font_style) const;
+  // given style and weight. |size_delta| is the size in pixels to add to the
+  // current font size. |font_style| specifies the new style, which is a
+  // bitmask of the values: Font::ITALIC and Font::UNDERLINE.
+  FontListImpl* Derive(int size_delta,
+                       int font_style,
+                       Font::Weight weight) const;
 
   // Returns the height of this font list, which is max(ascent) + max(descent)
   // for all the fonts in the font list.
   int GetHeight() const;
 
   // Returns the baseline of this font list, which is max(baseline) for all the
   // fonts in the font list.
   int GetBaseline() const;
 
   // Returns the cap height of this font list.
   // Currently returns the cap height of the primary font.
   int GetCapHeight() const;
 
   // Returns the expected number of horizontal pixels needed to display the
   // specified length of characters. Call GetStringWidth() to retrieve the
   // actual number.
   int GetExpectedTextWidth(int length) const;
 
-  // Returns the |gfx::Font::FontStyle| style flags for this font list.
+  // Returns the |Font::FontStyle| style flags for this font list.
   int GetFontStyle() const;
 
   // Returns the font size in pixels.
   int GetFontSize() const;
 
+  // Returns the font weight.
+  Font::Weight GetFontWeight() const;
+
   // Returns the Font vector.
   const std::vector<Font>& GetFonts() const;
 
   // Returns the first font in the list.
   const Font& GetPrimaryFont() const;
 
  private:
   friend class base::RefCounted<FontListImpl>;
 
   ~FontListImpl();
@@ skipping 20 matching lines @@
   // TODO(derat): Remove laziness so that this can be removed.
   mutable std::string font_description_string_;
 
   // The cached common height and baseline of the fonts in the font list.
   mutable int common_height_;
   mutable int common_baseline_;
 
   // Cached font style and size.
   mutable int font_style_;
   mutable int font_size_;
+  mutable Font::Weight font_weight_;
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_FONT_LIST_IMPL_H_