Implement Tab Detaching in Fullscreen Mode on Mac OSX

chrome/browser/ui/cocoa/browser_window_controller_private.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/ui/cocoa/browser_window_controller_private.h"
 
 #include <cmath>
 
 #import "base/auto_reset.h"
 #include "base/command_line.h"
@@ skipping 106 matching lines @@
 - (void)createTabStripController {
   DCHECK([overlayableContentsController_ activeContainer]);
   DCHECK([[overlayableContentsController_ activeContainer] window]);
   tabStripController_.reset([[TabStripController alloc]
       initWithView:[self tabStripView]
         switchView:[overlayableContentsController_ activeContainer]
            browser:browser_.get()
           delegate:self]);
 }
 
+- (void)updateFullscreenCollectionBehavior {
+  // Set the window to participate in Lion Fullscreen mode.  Setting this flag
+  // has no effect on Snow Leopard or earlier.  Panels can share a fullscreen
+  // space with a tabbed window, but they can not be primary fullscreen
+  // windows.
+  // This ensures the fullscreen button is appropriately positioned. It must
+  // be done before calling layoutSubviews because the new avatar button's
+  // position depends on the fullscreen button's position, as well as
+  // TabStripController's rightIndentForControls.
+  // The fullscreen button's position may depend on the old avatar button's
+  // width, but that does not require calling layoutSubviews first.
+  NSWindow* window = [self window];
+  NSUInteger collectionBehavior = [window collectionBehavior];
+  collectionBehavior &= ~NSWindowCollectionBehaviorFullScreenAuxiliary;
+  collectionBehavior &= ~NSWindowCollectionBehaviorFullScreenPrimary;
+  collectionBehavior |= browser_->type() == Browser::TYPE_TABBED ||
+                                browser_->type() == Browser::TYPE_POPUP
+                            ? NSWindowCollectionBehaviorFullScreenPrimary
+                            : NSWindowCollectionBehaviorFullScreenAuxiliary;
+  [window setCollectionBehavior:collectionBehavior];
+}
+
 - (void)saveWindowPositionIfNeeded {
   if (!chrome::ShouldSaveWindowPlacement(browser_.get()))
     return;
 
   // If we're in fullscreen mode, save the position of the regular window
   // instead.
   NSWindow* window =
       [self isInAnyFullscreenMode] ? savedRegularWindow_ : [self window];
 
   // Window positions are stored relative to the origin of the primary monitor.
@@ skipping 1086 matching lines @@
   return nil;
 }
 
 - (BOOL)isFullscreenForTabContent {
   return browser_->exclusive_access_manager()
                  ->fullscreen_controller()
                  ->IsWindowFullscreenForTabOrPending();
 }
 
 @end  // @implementation BrowserWindowController(Private)