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 ~CoreTabHelper() override;
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 void DidStartLoading(content::RenderViewHost* render_view_host) override;
60 void WasShown() override;
61 void WebContentsDestroyed() override;
62 void BeforeUnloadFired(const base::TimeTicks& proceed_time) override;
63 void BeforeUnloadDialogCancelled() override;
64 bool OnMessageReceived(const IPC::Message& message,
65 content::RenderFrameHost* render_frame_host) override;
67 void OnRequestThumbnailForContextNodeACK(const SkBitmap& bitmap,
68 const gfx::Size& original_size);
70 // Delegate for notifying our owner about stuff. Not owned by us.
71 CoreTabHelperDelegate* delegate_;
73 // The time when we started to create the new tab page. This time is from
74 // before we created this WebContents.
75 base::TimeTicks new_tab_start_time_;
77 // The time that we started to close this WebContents.
78 base::TimeTicks close_start_time_;
80 // The time when onbeforeunload ended.
81 base::TimeTicks before_unload_end_time_;
83 // The time when the tab was removed from view during close.
84 base::TimeTicks unload_detached_start_time_;
86 // Content restrictions, used to disable print/copy etc based on content's
87 // (full-page plugins for now only) permissions.
88 int content_restrictions_;
90 DISALLOW_COPY_AND_ASSIGN(CoreTabHelper);
93 #endif // CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_