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.
5 #ifndef CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_
6 #define CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_
8 #include "base/time/time.h"
9 #include "content/public/browser/web_contents_observer.h"
10 #include "content/public/browser/web_contents_user_data.h"
12 class CoreTabHelperDelegate
;
14 // Per-tab class to handle functionality that is core to the operation of tabs.
15 class CoreTabHelper
: public content::WebContentsObserver
,
16 public content::WebContentsUserData
<CoreTabHelper
> {
18 virtual ~CoreTabHelper();
20 // Initial title assigned to NavigationEntries from Navigate.
21 static base::string16
GetDefaultTitle();
23 // Returns a human-readable description the tab's loading state.
24 base::string16
GetStatusText() const;
26 // Notification that tab closing has started. This can be called multiple
27 // times, subsequent calls are ignored.
28 void OnCloseStarted();
30 // Notification that tab closing was cancelled. This can happen when a user
31 // cancels a window close via another tab's beforeunload dialog.
32 void OnCloseCanceled();
34 // Set the time during close when unload is started. Normally, this is set
35 // after the beforeunload dialog. However, for a window close, it is set
36 // after all the beforeunload dialogs have finished.
37 void OnUnloadStarted();
39 // Set the time during close when the tab is no longer visible.
40 void OnUnloadDetachedStarted();
42 void UpdateContentRestrictions(int content_restrictions
);
44 CoreTabHelperDelegate
* delegate() const { return delegate_
; }
45 void set_delegate(CoreTabHelperDelegate
* d
) { delegate_
= d
; }
47 void set_new_tab_start_time(const base::TimeTicks
& time
) {
48 new_tab_start_time_
= time
;
51 base::TimeTicks
new_tab_start_time() const { return new_tab_start_time_
; }
52 int content_restrictions() const { return content_restrictions_
; }
55 explicit CoreTabHelper(content::WebContents
* web_contents
);
56 friend class content::WebContentsUserData
<CoreTabHelper
>;
58 // content::WebContentsObserver overrides:
59 virtual void DidStartLoading(
60 content::RenderViewHost
* render_view_host
) OVERRIDE
;
61 virtual void WasShown() OVERRIDE
;
62 virtual void WebContentsDestroyed(
63 content::WebContents
* web_contents
) OVERRIDE
;
64 virtual void BeforeUnloadFired(const base::TimeTicks
& proceed_time
) OVERRIDE
;
65 virtual void BeforeUnloadDialogCancelled() OVERRIDE
;
66 virtual bool OnMessageReceived(const IPC::Message
& message
) OVERRIDE
;
68 void OnRequestThumbnailForContextNodeACK(const SkBitmap
& bitmap
,
69 const gfx::Size
& original_size
);
71 // Delegate for notifying our owner about stuff. Not owned by us.
72 CoreTabHelperDelegate
* delegate_
;
74 // The time when we started to create the new tab page. This time is from
75 // before we created this WebContents.
76 base::TimeTicks new_tab_start_time_
;
78 // The time that we started to close this WebContents.
79 base::TimeTicks close_start_time_
;
81 // The time when onbeforeunload ended.
82 base::TimeTicks before_unload_end_time_
;
84 // The time when the tab was removed from view during close.
85 base::TimeTicks unload_detached_start_time_
;
87 // Content restrictions, used to disable print/copy etc based on content's
88 // (full-page plugins for now only) permissions.
89 int content_restrictions_
;
91 DISALLOW_COPY_AND_ASSIGN(CoreTabHelper
);
94 #endif // CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_