Cocoa: Support constrained windows for platform apps

chrome/browser/ui/cocoa/constrained_window_mac.h

 // 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.
 
 #ifndef CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_MAC_H_
 #define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_MAC_H_
 
 #import <Cocoa/Cocoa.h>
 
 #include "base/basictypes.h"
 #include "base/logging.h"
 #include "base/memory/scoped_nsobject.h"
 #include "chrome/browser/ui/constrained_window.h"
 
-@class BrowserWindowController;
+class ConstrainedWindowMac;
 @class GTMWindowSheetController;
 @class NSView;
 @class NSWindow;
 class TabContents;
 
+// Window controllers that allow hosting constrained windows should
+// implement this protocol.
+@protocol ConstrainedWindowSupport
+
+// Requests that |window| is opened as a per-tab sheet to the current tab.
+- (void)attachConstrainedWindow:(ConstrainedWindowMac*)window;
+
+// Closes the tab sheet |window| and potentially shows the next sheet in the
+// tab's sheet queue.
+- (void)removeConstrainedWindow:(ConstrainedWindowMac*)window;
+
+// Returns NO if constrained windows cannot be attached to this window.
+- (BOOL)canAttachConstrainedWindow;
+
+@end
+
 // Base class for constrained dialog delegates. Never inherit from this
 // directly.
 class ConstrainedWindowMacDelegate {
  public:
   ConstrainedWindowMacDelegate() : is_sheet_open_(false) {}
   virtual ~ConstrainedWindowMacDelegate() {}
 
   // Tells the delegate to either delete itself or set up a task to delete
   // itself later. Note that you MUST close the sheet belonging to your delegate
   // in this method.
@@ skipping 86 matching lines @@
   virtual void ShowConstrainedWindow() OVERRIDE;
   virtual void CloseConstrainedWindow() OVERRIDE;
 
   // Returns the TabContents that constrains this Constrained Window.
   TabContents* owner() const { return tab_contents_; }
 
   // Returns the window's delegate.
   ConstrainedWindowMacDelegate* delegate() { return delegate_; }
 
   // Makes the constrained window visible, if it is not yet visible.
-  void Realize(BrowserWindowController* controller);
+  void Realize(NSWindowController<ConstrainedWindowSupport>* controller);
 
  private:
   friend class ConstrainedWindow;
 
   // The TabContents that owns and constrains this ConstrainedWindow.
   TabContents* tab_contents_;
 
   // Delegate that provides the contents of this constrained window.
   ConstrainedWindowMacDelegate* delegate_;
 
   // Controller of the window that contains this sheet.
-  BrowserWindowController* controller_;
+  NSWindowController<ConstrainedWindowSupport>* controller_;
 
   // Stores if |ShowConstrainedWindow()| was called.
   bool should_be_visible_;
 
   // True when CloseConstrainedWindow has been called.
   bool closing_;
 
   DISALLOW_COPY_AND_ASSIGN(ConstrainedWindowMac);
 };
 
 #endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_MAC_H_