Add ability to defined ranges with different styles in StyledLabel

ui/views/controls/styled_label.h

Index: ui/views/controls/styled_label.h
diff --git a/ui/views/controls/styled_label.h b/ui/views/controls/styled_label.h
index 3b683d2e4903e992c1ac7be3438df91db6924d37..86ed024465da4883d673cac26e28a6a4da32ee19 100644
--- a/ui/views/controls/styled_label.h
+++ b/ui/views/controls/styled_label.h
@@ -25,12 +25,26 @@ class StyledLabelListener;
 // of text.
 class VIEWS_EXPORT StyledLabel : public View, public LinkListener {
  public:
+  // Parameters that define label style for a styled label's text range.
+  struct RangeStyleInfo {
+    RangeStyleInfo();
+    ~RangeStyleInfo();
+
+    int font_style;
+    string16 tooltip;
+    bool disable_line_wrapping;
+    bool linkify;
+  };
+
   StyledLabel(const string16& text, StyledLabelListener* listener);
   virtual ~StyledLabel();
 
   // Marks the given range within |text_| as a link.
   void AddLink(const ui::Range& range);
 
+  // Marks the given range within |text_| with style defined by |style_info|.
+  void AddStyleRange(const ui::Range& range, const RangeStyleInfo& style_info);
+
   // View implementation:
   virtual gfx::Insets GetInsets() const OVERRIDE;
   virtual int GetHeightForWidth(int w) OVERRIDE;
@@ -40,13 +54,18 @@ class VIEWS_EXPORT StyledLabel : public View, public LinkListener {
   virtual void LinkClicked(Link* source, int event_flags) OVERRIDE;
 
  private:
-  struct LinkRange {
-    explicit LinkRange(const ui::Range& range) : range(range) {}
-    ~LinkRange() {}
+  struct StyleRange {
+    StyleRange(const ui::Range& range,
+                const RangeStyleInfo& style_info)
+        : range(range),
+          style_info(style_info) {
+    }
+    ~StyleRange() {}
 
-    bool operator<(const LinkRange& other) const;
+    bool operator<(const StyleRange& other) const;
 
     ui::Range range;
+    RangeStyleInfo style_info;
   };
 
   // Calculates how to layout child views, creates them and sets their size
@@ -62,10 +81,10 @@ class VIEWS_EXPORT StyledLabel : public View, public LinkListener {
   StyledLabelListener* listener_;
 
   // The ranges that should be linkified, sorted by start position.
-  std::priority_queue<LinkRange> link_ranges_;
+  std::priority_queue<StyleRange> style_ranges_;
 
-  // A mapping from Link* control to the range it corresponds to in |text_|.
-  std::map<Link*, ui::Range> link_targets_;
+  // A mapping from a link control to the range it corresponds to in |text_|.
+  std::map<View*, ui::Range> link_targets_;
 
   // This variable saves the result of the last GetHeightForWidth call in order
   // to avoid repeated calculation.