1 // Copyright (c) 2012 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_TAB_CONTENTS_TAB_CONTENTS_CONTROLLER_H_ 6 #define CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_TAB_CONTENTS_CONTROLLER_H_ 7 8 #include <Cocoa/Cocoa.h> 9 10 #include "base/memory/scoped_ptr.h" 11 12 class FullscreenObserver; 13 14 namespace content { 15 class WebContents; 16 } 17 18 // A class that controls the WebContents view. It internally creates a container 19 // view (the NSView accessed by calling |-view|) which manages the layout and 20 // display of the WebContents view. 21 // 22 // Client code that inserts [controller view] into the view hierarchy needs to 23 // beforehand call the |-ensureContentsSizeDoesNotChange| method. This will 24 // avoid multiple resize messages being sent to the renderer and triggering 25 // redundant and costly layouts. After the view has been inserted, client code 26 // calls |-ensureContentsVisible| to display the WebContents view. 27 // 28 // AutoEmbedFullscreen mode: When enabled, TabContentsController will observe 29 // for WebContents fullscreen changes and automatically swap the normal 30 // WebContents view with the fullscreen view (if different). In addition, if a 31 // WebContents is being screen-captured, the view will be centered within the 32 // container view, sized to the aspect ratio of the capture video resolution, 33 // and scaling will be avoided whenever possible. 34 @interface TabContentsController : NSViewController { 35 @private 36 content::WebContents* contents_; // weak 37 // When |fullscreenObserver_| is not-NULL, TabContentsController monitors for 38 // and auto-embeds fullscreen widgets as a subview. 39 scoped_ptr<FullscreenObserver> fullscreenObserver_; 40 // Set to true while TabContentsController is embedding a fullscreen widget 41 // view as a subview instead of the normal WebContentsView render view. Note: 42 // This will be false in the case of non-Flash fullscreen. 43 BOOL isEmbeddingFullscreenWidget_; 44 } 45 @property(readonly, nonatomic) content::WebContents* webContents; 46 47 // Create the contents of a tab represented by |contents|. 48 - (id)initWithContents:(content::WebContents*)contents; 49 50 // Call when the container view owned by TabContentsController is about to be 51 // resized and inserted into the view hierarchy, so as to not trigger 52 // unnecessary content re-layout. 53 - (void)ensureContentsSizeDoesNotChange; 54 55 // Call after the container view is inserted into the view hierarchy and 56 // properly sized. Then, this method will select either the WebContents view or 57 // the fullscreen view and swap it into the view hierarchy for display. 58 - (void)ensureContentsVisible; 59 60 // Call to change the underlying web contents object. View is not changed, 61 // call |-ensureContentsVisible| to display the |newContents|'s render widget 62 // host view. 63 - (void)changeWebContents:(content::WebContents*)newContents; 64 65 // Called when the tab contents is the currently selected tab and is about to be 66 // removed from the view hierarchy. 67 - (void)willBecomeUnselectedTab; 68 69 // Called when the tab contents is about to be put into the view hierarchy as 70 // the selected tab. Handles things such as ensuring the toolbar is correctly 71 // enabled. 72 - (void)willBecomeSelectedTab; 73 74 // Called when the tab contents is updated in some non-descript way (the 75 // notification from the model isn't specific). |updatedContents| could reflect 76 // an entirely new tab contents object. 77 - (void)tabDidChange:(content::WebContents*)updatedContents; 78 79 // Called to switch the container's subview to the WebContents-owned fullscreen 80 // widget or back to WebContentsView's widget. 81 - (void)toggleFullscreenWidget:(BOOL)enterFullscreen; 82 83 @end 84 85 #endif // CHROME_BROWSER_UI_COCOA_TAB_CONTENTS_TAB_CONTENTS_CONTROLLER_H_ 86
