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      1 // Copyright (c) 2011 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 CHROME_BROWSER_UI_COCOA_LOCATION_BAR_KEYWORD_HINT_DECORATION_H_
      6 #define CHROME_BROWSER_UI_COCOA_LOCATION_BAR_KEYWORD_HINT_DECORATION_H_
      7 #pragma once
      8 
      9 #include <string>
     10 
     11 #import "chrome/browser/ui/cocoa/location_bar/location_bar_decoration.h"
     12 
     13 #import "base/memory/scoped_nsobject.h"
     14 #include "base/string16.h"
     15 
     16 // Draws the keyword hint, "Press [tab] to search <site>".
     17 
     18 class KeywordHintDecoration : public LocationBarDecoration {
     19  public:
     20   KeywordHintDecoration(NSFont* font);
     21   virtual ~KeywordHintDecoration();
     22 
     23   // Calculates the message to display and where to place the [tab]
     24   // image.
     25   void SetKeyword(const string16& keyword, bool is_extension_keyword);
     26 
     27   // Implement |LocationBarDecoration|.
     28   virtual void DrawInFrame(NSRect frame, NSView* control_view);
     29   virtual CGFloat GetWidthForSpace(CGFloat width);
     30 
     31  private:
     32   // Fetch and cache the [tab] image.
     33   NSImage* GetHintImage();
     34 
     35   // Attributes for drawing the hint string, such as font and color.
     36   scoped_nsobject<NSDictionary> attributes_;
     37 
     38   // Cache for the [tab] image.
     39   scoped_nsobject<NSImage> hint_image_;
     40 
     41   // The text to display to the left and right of the hint image.
     42   scoped_nsobject<NSString> hint_prefix_;
     43   scoped_nsobject<NSString> hint_suffix_;
     44 
     45   DISALLOW_COPY_AND_ASSIGN(KeywordHintDecoration);
     46 };
     47 
     48 #endif  // CHROME_BROWSER_UI_COCOA_LOCATION_BAR_KEYWORD_HINT_DECORATION_H_
     49