[Mac] Reveal Fullscreen Toolbar for Tab Strip Changes

chrome/browser/ui/cocoa/presentation_mode_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_PRESENTATION_MODE_CONTROLLER_H_
 #define CHROME_BROWSER_UI_COCOA_PRESENTATION_MODE_CONTROLLER_H_
 
 #include <Carbon/Carbon.h>
 #import <Cocoa/Cocoa.h>
 
@@ skipping 80 matching lines @@
   // The fraction of the AppKit Menubar that is showing. Ranges from 0 to 1.
   // Only used in AppKit Fullscreen.
   CGFloat menubarFraction_;
 
   // The fraction of the omnibox/tabstrip that is showing. Ranges from 0 to 1.
   // Used in both AppKit and Immersive Fullscreen.
   CGFloat toolbarFraction_;
 
   // A Carbon event handler that tracks the revealed fraction of the menu bar.
   EventHandlerRef menuBarTrackingHandler_;
+
+  // True when the toolbar is dropped to show tabstrip changes.
+  BOOL revealToolbarForTabStripChanges_;
 }
 
 @property(readonly, nonatomic) BOOL inPresentationMode;
 @property(nonatomic, assign) fullscreen_mac::SlidingStyle slidingStyle;
 @property(nonatomic, assign) CGFloat toolbarFraction;
 
 // Designated initializer.
 - (id)initWithBrowserController:(BrowserWindowController*)controller
                           style:(fullscreen_mac::SlidingStyle)style;
 
@@ skipping 19 matching lines @@
 - (void)overlayFrameChanged:(NSRect)frame;
 
 // Informs the controller that the overlay should be shown/hidden, possibly with
 // animation, possibly after a delay (only applicable for the animated case).
 - (void)ensureOverlayShownWithAnimation:(BOOL)animate delay:(BOOL)delay;
 - (void)ensureOverlayHiddenWithAnimation:(BOOL)animate delay:(BOOL)delay;
 
 // Cancels any running animation and timers.
 - (void)cancelAnimationAndTimers;
 
+// Animates the toolbar dropping down to show changes to the tab strip.
+- (void)revealToolbarForTabStripChanges;
+
 // In any fullscreen mode, the y offset to use for the content at the top of
 // the screen (tab strip, omnibox, bookmark bar, etc).
 // Ranges from 0 to -22.
 - (CGFloat)menubarOffset;
 
 // Returns true if the window is the main window.
 - (BOOL)isMainWindow;
 
 @end
 
 // Private methods exposed for testing.
 @interface PresentationModeController (ExposedForTesting)
 // Adjusts the AppKit Fullscreen options of the application.
 - (void)setSystemFullscreenModeTo:(base::mac::FullScreenMode)mode;
 
 // Callback for menu bar animations.
 - (void)setMenuBarRevealProgress:(CGFloat)progress;
 
 // Updates the local state that reflects the fraction of the toolbar area that
 // is showing. This function has the side effect of changing the AppKit
 // Fullscreen option for whether the menu bar is shown.
 - (void)changeToolbarFraction:(CGFloat)fraction;
 @end
 
 // Notification posted when we're about to enter or leave fullscreen.
 extern NSString* const kWillEnterFullscreenNotification;
 extern NSString* const kWillLeaveFullscreenNotification;
 
 #endif  // CHROME_BROWSER_UI_COCOA_PRESENTATION_MODE_CONTROLLER_H_