[Mac] Middle clicking on home button does not work. It should open home in new

tab. backward button, forward button and reload button have the same problem.

XIB Changes:
* Add ToolbarButton for buttons which should handle middle clicking.
* Switch the home button to be ToolbarButton instead of NSButton.
* Back/forward and reload buttons inherit from ToolbarButton instead of
  NSButton.

BUG=45795
TEST=Middle click on the home button create new tab with home page, or on the
 reload button create new tab with current page. Middle click on the
 back/forward buttons also work with new tab. unit_tests include
 TestbarButtonTest.* suites for testint that.
R=pinkerton@chromium.org,avi@chromium.org,viettrungluu@chromium.org,mark@chromium.org,shess@chromium.org,rohitrao@chromium.org
Review URL: http://codereview.chromium.org/6703004

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@79245 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 33 insertions, 0 deletions

diff --git a/chrome/browser/ui/cocoa/toolbar/toolbar_button.h b/chrome/browser/ui/cocoa/toolbar/toolbar_button.h
new file mode 100644
index 0000000..c35d1e5
--- /dev/null
+++ b/chrome/browser/ui/cocoa/toolbar/toolbar_button.h
@@ -0,0 +1,33 @@
+// Copyright (c) 2011 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_UI_COCOA_TOOLBAR_TOOLBAR_BUTTON_H_
+#define CHROME_BROWSER_UI_COCOA_TOOLBAR_TOOLBAR_BUTTON_H_
+#pragma once
+
+#import <Cocoa/Cocoa.h>
+
+// NSButton subclass which handles middle mouse clicking.
+
+@interface ToolbarButton : NSButton {
+ @protected
+  // YES when middle mouse clicks should be handled.
+  BOOL handleMiddleClick_;
+
+  // YES when a middle mouse click is being handled. This is set to YES by an
+  // NSOtherMouseDown event, and NO by an NSOtherMouseUp event. While this is
+  // YES, other mouse button events should be ignored.
+  BOOL handlingMiddleClick_;
+}
+
+// Whether or not to handle the mouse middle click events.
+@property(assign, nonatomic) BOOL handleMiddleClick;
+
+@end
+
+@interface ToolbarButton (ExposedForTesting)
+- (BOOL)shouldHandleEvent:(NSEvent*)theEvent;
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_TOOLBAR_TOOLBAR_BUTTON_H_