[Mac] Hover/Pressed background for the Omnibox decorations

chrome/browser/ui/cocoa/location_bar/autocomplete_text_field_cell.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.
 
 #include <vector>
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/mac/scoped_nsobject.h"
 #import "chrome/browser/ui/cocoa/styled_text_field_cell.h"
 
 @class AutocompleteTextField;
 class LocationBarDecoration;
 
 // AutocompleteTextFieldCell extends StyledTextFieldCell to provide support for
 // certain decorations to be applied to the field.  These are the search hint
 // ("Type to search" on the right-hand side), the keyword hint ("Press [Tab] to
 // search Engine" on the right-hand side), and keyword mode ("Search Engine:" in
 // a button-like token on the left-hand side).
 @interface AutocompleteTextFieldCell : StyledTextFieldCell {
  @private
   // Decorations which live to the left and right of the text, ordered
   // from outside in.  Decorations are owned by |LocationBarViewMac|.
   std::vector<LocationBarDecoration*> leftDecorations_;
   std::vector<LocationBarDecoration*> rightDecorations_;
 
+  // Decorations with tracking areas attached to the AutocompleteTextField.
+  std::vector<LocationBarDecoration*> mouseTrackingDecorations_;
+
   // If YES then the text field will not draw a focus ring or show the insertion
   // pointer.
   BOOL hideFocusState_;
 
   // YES if this field is shown in a popup window.
   BOOL isPopupMode_;
 
   // Retains the NSEvent that caused the controlView to become firstResponder.
   base::scoped_nsobject<NSEvent> focusEvent_;
 
   // The coordinate system line width that draws a single pixel line.
   CGFloat singlePixelLineWidth_;
 }
 
 @property(assign, nonatomic) BOOL isPopupMode;
 @property(assign, nonatomic) CGFloat singlePixelLineWidth;
 
 // Line height used for text in this cell.
 - (CGFloat)lineHeight;
 
+// Remove all of the tracking areas.
+- (void)clearTrackingArea;
+
 // Clear |leftDecorations_| and |rightDecorations_|.
 - (void)clearDecorations;
 
 // Add a new left-side decoration to the right of the existing
 // left-side decorations.
 - (void)addLeftDecoration:(LocationBarDecoration*)decoration;
 
 // Add a new right-side decoration to the left of the existing
 // right-side decorations.
 - (void)addRightDecoration:(LocationBarDecoration*)decoration;
@@ skipping 31 matching lines @@
 - (NSMenu*)decorationMenuForEvent:(NSEvent*)theEvent
                            inRect:(NSRect)cellFrame
                            ofView:(AutocompleteTextField*)controlView;
 
 // Called by |AutocompleteTextField| to let page actions intercept
 // clicks.  Returns |YES| if the click has been intercepted.
 - (BOOL)mouseDown:(NSEvent*)theEvent
            inRect:(NSRect)cellFrame
            ofView:(AutocompleteTextField*)controlView;
 
+// Called by |AutocompleteTextField| to pass the mouse up event to the omnibox
+// decorations.
+- (void)mouseUp:(NSEvent*)theEvent
+         inRect:(NSRect)cellFrame
+         ofView:(AutocompleteTextField*)controlView;
+
 // Overridden from StyledTextFieldCell to include decorations adjacent
 // to the text area which don't handle mouse clicks themselves.
 // Keyword-search bubble, for instance.
 - (NSRect)textCursorFrameForFrame:(NSRect)cellFrame;
 
-// Setup decoration tooltips on |controlView| by calling
-// |-addToolTip:forRect:|.
-- (void)updateToolTipsInRect:(NSRect)cellFrame
-                      ofView:(AutocompleteTextField*)controlView;
+// Setup decoration tooltips and mouse tracking on |controlView| by calling
+// |-addToolTip:forRect:| and |SetupTrackingArea()|.
+- (void)updateMouseTrackingAndToolTipsInRect:(NSRect)cellFrame
+                                      ofView:
+                                          (AutocompleteTextField*)controlView;
 
 // Gets and sets |hideFocusState|. This allows the text field to have focus but
 // to appear unfocused.
 - (BOOL)hideFocusState;
 - (void)setHideFocusState:(BOOL)hideFocusState
                    ofView:(AutocompleteTextField*)controlView;
 
 // Handles the |event| that caused |controlView| to become firstResponder.
 - (void)handleFocusEvent:(NSEvent*)event
                   ofView:(AutocompleteTextField*)controlView;
 @end
+
+// Methods which are either only for testing, or only public for testing.
+@interface AutocompleteTextFieldCell (TestingAPI)
+
+// Returns |mouseTrackingDecorations_|.
+- (const std::vector<LocationBarDecoration*>&)mouseTrackingDecorations;
+
+@end