chrome/browser/ui/cocoa/fullscreen_mode_controller.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_UI_COCOA_FULLSCREEN_MODE_CONTROLLER_H_
   6 #define CHROME_BROWSER_UI_COCOA_FULLSCREEN_MODE_CONTROLLER_H_
   7
   8 #include <Carbon/Carbon.h>
   9 #import <Cocoa/Cocoa.h>
  10
  11 #import "base/mac/scoped_nsobject.h"
  12 #import "ui/base/cocoa/tracking_area.h"
  13
  14 @class BrowserWindowController;
  15
  16 // This class is responsible for managing the menu bar and tabstrip animation
  17 // when in --enable-simplified-fullscreen. By default, in fullscreen, only the
  18 // toolbar and not the tabstrip are visible. When the user mouses near the top
  19 // of the screen, then the full tabstrip becomes available. If the user mouses
  20 // to the very top of the screen, the menubar also becomes visible.
  21 //
  22 // There is one instance of this class per BrowserWindowController, and it is
  23 // created when fullscreen is being entered and is destroyed when fullscreen
  24 // is exited.
  25 @interface FullscreenModeController : NSObject<NSAnimationDelegate> {
  26  @private
  27   enum FullscreenToolbarState {
  28     kFullscreenToolbarOnly,
  29     kFullscreenToolbarAndTabstrip,
  30   };
  31
  32   // The browser for which this is managing fullscreen. Weak, owns self.
  33   BrowserWindowController* controller_;
  34
  35   // The tracking area used to observe the top region of the fullscren window,
  36   // to initiate the animations to bring down the tabstrip.
  37   ui::ScopedCrTrackingArea trackingArea_;
  38
  39   // The animation that is either showing or hiding the tabstrip. Nil when no
  40   // animation is running.
  41   base::scoped_nsobject<NSAnimation> animation_;
  42
  43   // The current and destination states of |animation_|. When no animation is
  44   // running, these values are equal.
  45   FullscreenToolbarState destinationState_;
  46   FullscreenToolbarState currentState_;
  47
  48   // A Carbon event handler that tracks the revealed fraction of the menu bar.
  49   EventHandlerRef menuBarTrackingHandler_;
  50
  51   // A fraction in the range [0.0, 1.0] that indicates how much of the
  52   // menu bar is visible. Updated via |menuBarTrackingHandler_|.
  53   CGFloat menuBarRevealFraction_;
  54 }
  55
  56 // Designated initializer. Must be called after making the window fullscreen.
  57 - (id)initWithBrowserWindowController:(BrowserWindowController*)bwc;
  58
  59 // Returns the pixel height of the menu bar, adjusted for fractional visibility.
  60 - (CGFloat)menuBarHeight;
  61
  62 @end
  63
  64 #endif  // CHROME_BROWSER_UI_COCOA_FULLSCREEN_MODE_CONTROLLER_H_