mac, fullscreen: Major refactor.

chrome/browser/ui/cocoa/fullscreen_mode_controller.h

-// Copyright 2013 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_FULLSCREEN_MODE_CONTROLLER_H_
-#define CHROME_BROWSER_UI_COCOA_FULLSCREEN_MODE_CONTROLLER_H_
-
-#include <Carbon/Carbon.h>
-#import <Cocoa/Cocoa.h>
-
-#import "base/mac/scoped_nsobject.h"
-#import "ui/base/cocoa/tracking_area.h"
-
-@class BrowserWindowController;
-
-// This class is responsible for managing the menu bar and tabstrip animation
-// when in --enable-simplified-fullscreen. By default, in fullscreen, only the
-// toolbar and not the tabstrip are visible. When the user mouses near the top
-// of the screen, then the full tabstrip becomes available. If the user mouses
-// to the very top of the screen, the menubar also becomes visible.
-//
-// There is one instance of this class per BrowserWindowController, and it is
-// created when fullscreen is being entered and is destroyed when fullscreen
-// is exited.
-@interface FullscreenModeController : NSObject<NSAnimationDelegate> {
- @private
-  enum FullscreenToolbarState {
-    kFullscreenToolbarOnly,
-    kFullscreenToolbarAndTabstrip,
-  };
-
-  // The browser for which this is managing fullscreen. Weak, owns self.
-  BrowserWindowController* controller_;
-
-  // The tracking area used to observe the top region of the fullscren window,
-  // to initiate the animations to bring down the tabstrip.
-  ui::ScopedCrTrackingArea trackingArea_;
-
-  // The animation that is either showing or hiding the tabstrip. Nil when no
-  // animation is running.
-  base::scoped_nsobject<NSAnimation> animation_;
-
-  // The current and destination states of |animation_|. When no animation is
-  // running, these values are equal.
-  FullscreenToolbarState destinationState_;
-  FullscreenToolbarState currentState_;
-
-  // A Carbon event handler that tracks the revealed fraction of the menu bar.
-  EventHandlerRef menuBarTrackingHandler_;
-
-  // A fraction in the range [0.0, 1.0] that indicates how much of the
-  // menu bar is visible. Updated via |menuBarTrackingHandler_|.
-  CGFloat menuBarRevealFraction_;
-}
-
-// Designated initializer. Must be called after making the window fullscreen.
-- (id)initWithBrowserWindowController:(BrowserWindowController*)bwc;
-
-// Returns the pixel height of the menu bar, adjusted for fractional visibility.
-- (CGFloat)menuBarHeight;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_FULLSCREEN_MODE_CONTROLLER_H_