[Mac] First part of Omnibox decoration refactor. Enable ev bubble.

chrome/browser/cocoa/location_bar/bubble_decoration.h

+// Copyright (c) 2010 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 CHROME_BROWSER_COCOA_LOCATION_BAR_BUBBLE_DECORATION_H_
+#define CHROME_BROWSER_COCOA_LOCATION_BAR_BUBBLE_DECORATION_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/gtest_prod_util.h"
+#include "base/scoped_nsobject.h"
+#include "chrome/browser/cocoa/location_bar/location_bar_decoration.h"
+
+// Draws an outlined rounded rect, with an optional image to the left
+// and an optional text label to the right.
+
+class BubbleDecoration : public LocationBarDecoration {
+ public:
+  // |font| will be used when drawing the label, and cannot be |nil|.
+  BubbleDecoration(NSFont* font);
+  ~BubbleDecoration();
+
+  // Setup the drawing parameters.
+  void SetImage(NSImage* image);
+  void SetLabel(NSString* label);
+  void SetColors(NSColor* border_color,
+                 NSColor* background_color,
+                 NSColor* text_color);
+
+  // Implement |LocationBarDecoration|.
+  virtual void DrawInFrame(NSRect frame, NSView* control_view);
+  virtual CGFloat GetWidthForSpace(CGFloat width);
+
+ protected:
+  // Helper returning bubble width for the given |image| and |label|
+  // assuming |font_| (for sizing text).  Arguments can be nil.
+  CGFloat GetWidthForImageAndLabel(NSImage* image, NSString* label);
+
+ private:
+  friend class SelectedKeywordDecorationTest;
+  FRIEND_TEST_ALL_PREFIXES(SelectedKeywordDecorationTest,
+                           UsesPartialKeywordIfNarrow);
+
+  // Contains font attribute for drawing |label_|.
+  scoped_nsobject<NSDictionary> attributes_;
+
+  // Image drawn in the left side of the bubble.
+  scoped_nsobject<NSImage> image_;
+
+  // Label to draw to right of image.  Can be |nil|.
+  scoped_nsobject<NSString> label_;
+
+  // Colors used to draw the bubble, should be set by the subclass
+  // constructor.
+  scoped_nsobject<NSColor> background_color_;
+  scoped_nsobject<NSColor> border_color_;
+  scoped_nsobject<NSColor> text_color_;
+
+  DISALLOW_COPY_AND_ASSIGN(BubbleDecoration);
+};
+
+#endif  // CHROME_BROWSER_COCOA_LOCATION_BAR_BUBBLE_DECORATION_H_