Share the code that builds the page menu in a common model, make Mac and Win ...

chrome/browser/cocoa/menu_controller.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_MENU_CONTROLLER_H_
+#define CHROME_BROWSER_COCOA_MENU_CONTROLLER_H_
+
+#import <Cocoa/Cocoa.h>
+
+#include "base/scoped_nsobject.h"
+#include "base/scoped_ptr.h"
+
+namespace menus {
+class MenuModel;
+}
+
+// A controller for the cross-platform menu model. The menu that's created
+// has the tag and represented object set for each menu item. The object is a
+// NSValue holding a pointer to the model for that level of the menu (to
+// allow for hierarchical menus). The tag is the index into that model for
+// that particular item. It is important that the model outlives this object
+// as it only maintains weak references.
+// TODO(pinkerton): Handle changes to the model. SimpleMenuModel doesn't yet
+// notify when changes are made.
+@interface MenuController : NSObject {
+ @private
+  scoped_nsobject<NSMenu> menu_;
+  BOOL useWithPopUpButtonCell_;  // If YES, 0th item is blank
+}
+
+// Builds a NSMenu from the pre-built model (must not be nil). Changes made
+// to the contents of the model after calling this will not be noticed. If
+// the menu will be displayed by a NSPopUpButtonCell, it needs to be of a
+// slightly different form (0th item is empty). Note this attribute of the menu
+// cannot be changed after it has been created.
+- (id)initWithModel:(menus::MenuModel*)model
+    useWithPopUpButtonCell:(BOOL)useWithCell;
+
+// Access to the constructed menu.
+- (NSMenu*)menu;
+
+@end
+
+// Exposed only for unit testing, do not call directly.
+@interface MenuController(PrivateExposedForTesting)
+- (BOOL)validateUserInterfaceItem:(id<NSValidatedUserInterfaceItem>)item;
+@end
+
+#endif  // CHROME_BROWSER_COCOA_MENU_CONTROLLER_H_