Mac: implement DnD of URLs onto Omnibox.

chrome/browser/cocoa/autocomplete_text_field.h

 // Copyright (c) 2009 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_AUTOCOMPLETE_TEXT_FIELD_H_
 #define CHROME_BROWSER_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_
 
 #import <Cocoa/Cocoa.h>
-#import "chrome/browser/cocoa/styled_text_field.h"
 
 #include "base/scoped_nsobject.h"
+#import "chrome/browser/cocoa/styled_text_field.h"
+#import "chrome/browser/cocoa/url_drop_target.h"
 
 @class AutocompleteTextFieldCell;
 
 // AutocompleteTextField intercepts UI actions for forwarding to
 // AutocompleteEditViewMac (*), and provides a custom look.  It works
 // together with AutocompleteTextFieldEditor (mostly for intercepting
 // user actions) and AutocompleteTextFieldCell (mostly for custom
 // drawing).
 //
 // For historical reasons, chrome/browser/autocomplete is the core
@@ skipping 46 matching lines @@
   // return true if |cmd| is handled, false if the caller should
   // handle it.
   // TODO(shess): For now, I think having the code which makes these
   // decisions closer to the other autocomplete code is worthwhile,
   // since it calls a wide variety of methods which otherwise aren't
   // clearly relevent to expose here.  But consider pulling more of
   // the AutocompleteEditViewMac calls up to here.
   virtual bool OnDoCommandBySelector(SEL cmd) = 0;
 };
 
-@interface AutocompleteTextField : StyledTextField {
+@interface AutocompleteTextField : StyledTextField<URLDropTarget> {
  @private
   // Undo manager for this text field.  We use a specific instance rather than
   // the standard undo manager in order to let us clear the undo stack at will.
   scoped_nsobject<NSUndoManager> undoManager_;
 
   AutocompleteTextFieldObserver* observer_;  // weak, owned by location bar.
+
+  // Handles being a drag-and-drop target.
+  scoped_nsobject<URLDropTargetHandler> dropHandler_;
 }
 
 @property AutocompleteTextFieldObserver* observer;
 
 // Convenience method to return the cell, casted appropriately.
 - (AutocompleteTextFieldCell*)autocompleteTextFieldCell;
 
 // Superclass aborts editing before changing the string, which causes
 // problems for undo.  This version modifies the field editor's
 // contents if the control is already being edited.
 - (void)setAttributedStringValue:(NSAttributedString*)aString;
 
 // Clears the undo chain for this text field.
 - (void)clearUndoChain;
 
 @end
 
 #endif  // CHROME_BROWSER_COCOA_AUTOCOMPLETE_TEXT_FIELD_H_