Constrained window sheet controller (test patch)

chrome/browser/ui/cocoa/constrained_window/constrained_window_sheet_controller.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_CONSTRAINED_WINDOW_SHEET_CONTROLLER_H_
+#define CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_CONTROLLER_H_
+
+#import <Cocoa/Cocoa.h>
+#include <vector>
+
+#include "base/memory/scoped_vector.h"
+#include "base/memory/scoped_nsobject.h"
+
+// This class can be used to implement tab modal sheets. Each tab can have
+// a single sheet and only the active tab's sheet will be visible.
+@interface ConstrainedWindowSheetController : NSObject <NSAnimationDelegate> {
+ @private
+  scoped_nsobject<NSMutableArray> sheets_;
+  scoped_nsobject<NSWindow> parentWindow_;
+  scoped_nsobject<NSView> activeView_;
+}
+
+// Returns a sheet controller for |parentWindow|. If a sheet controller does not
+// exist yet then one will be created.
++ (ConstrainedWindowSheetController*)
+    controllerForParentWindow:(NSWindow*)parentWindow;
+
+// Find a controller that's managing the given sheet. If no such controller
+// exists then nil is returned.
++ (ConstrainedWindowSheetController*)controllerForSheet:(NSWindow*)sheet;
+
+// Shows the given sheet over |parentView|. If |parentView| is not the active
+// view then the sheet is not shown until the |parentView| becomes active.
+- (void)showSheet:(NSWindow*)sheet
+    forParentView:(NSView*)parentView;
+
+// Closes the given sheet. If the parent view of the sheet is currently active
+// then an asynchronous animation will be run and the sheet will be closed
+// at the end of the animation.
+- (void)closeSheet:(NSWindow*)sheet;
+
+// Make |parentView| the current active view. If |parentView| has an attached
+// sheet then the sheet is made visible.
+- (void)parentViewDidBecomeActive:(NSView*)parentView;
+
+// Gets the number of sheets attached to the controller's window.
+- (int)sheetCount;
+
+// Testing only API. End any pending animation for the given sheet.
+- (void)endAnimationForSheet:(NSWindow*)sheet;
+
+@end
+
+#endif  // CHROME_BROWSER_UI_COCOA_CONSTRAINED_WINDOW_CONSTRAINED_WINDOW_SHEET_CONTROLLER_H_