| // 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_TAB_CONTENTS_CORE_TAB_HELPER_H_ |
| #define CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_ |
| |
| #include "base/time/time.h" |
| #include "content/public/browser/web_contents_observer.h" |
| #include "content/public/browser/web_contents_user_data.h" |
| |
| class CoreTabHelperDelegate; |
| |
| // Per-tab class to handle functionality that is core to the operation of tabs. |
| class CoreTabHelper : public content::WebContentsObserver, |
| public content::WebContentsUserData<CoreTabHelper> { |
| public: |
| virtual ~CoreTabHelper(); |
| |
| // Initial title assigned to NavigationEntries from Navigate. |
| static base::string16 GetDefaultTitle(); |
| |
| // Returns a human-readable description the tab's loading state. |
| base::string16 GetStatusText() const; |
| |
| // Notification that tab closing has started. This can be called multiple |
| // times, subsequent calls are ignored. |
| void OnCloseStarted(); |
| |
| // Notification that tab closing was cancelled. This can happen when a user |
| // cancels a window close via another tab's beforeunload dialog. |
| void OnCloseCanceled(); |
| |
| // Set the time during close when unload is started. Normally, this is set |
| // after the beforeunload dialog. However, for a window close, it is set |
| // after all the beforeunload dialogs have finished. |
| void OnUnloadStarted(); |
| |
| // Set the time during close when the tab is no longer visible. |
| void OnUnloadDetachedStarted(); |
| |
| void UpdateContentRestrictions(int content_restrictions); |
| |
| CoreTabHelperDelegate* delegate() const { return delegate_; } |
| void set_delegate(CoreTabHelperDelegate* d) { delegate_ = d; } |
| |
| void set_new_tab_start_time(const base::TimeTicks& time) { |
| new_tab_start_time_ = time; |
| } |
| |
| base::TimeTicks new_tab_start_time() const { return new_tab_start_time_; } |
| int content_restrictions() const { return content_restrictions_; } |
| |
| private: |
| explicit CoreTabHelper(content::WebContents* web_contents); |
| friend class content::WebContentsUserData<CoreTabHelper>; |
| |
| // content::WebContentsObserver overrides: |
| virtual void DidStartLoading( |
| content::RenderViewHost* render_view_host) OVERRIDE; |
| virtual void WasShown() OVERRIDE; |
| virtual void WebContentsDestroyed() OVERRIDE; |
| virtual void BeforeUnloadFired(const base::TimeTicks& proceed_time) OVERRIDE; |
| virtual void BeforeUnloadDialogCancelled() OVERRIDE; |
| virtual bool OnMessageReceived( |
| const IPC::Message& message, |
| content::RenderFrameHost* render_frame_host) OVERRIDE; |
| |
| void OnRequestThumbnailForContextNodeACK(const SkBitmap& bitmap, |
| const gfx::Size& original_size); |
| |
| // Delegate for notifying our owner about stuff. Not owned by us. |
| CoreTabHelperDelegate* delegate_; |
| |
| // The time when we started to create the new tab page. This time is from |
| // before we created this WebContents. |
| base::TimeTicks new_tab_start_time_; |
| |
| // The time that we started to close this WebContents. |
| base::TimeTicks close_start_time_; |
| |
| // The time when onbeforeunload ended. |
| base::TimeTicks before_unload_end_time_; |
| |
| // The time when the tab was removed from view during close. |
| base::TimeTicks unload_detached_start_time_; |
| |
| // Content restrictions, used to disable print/copy etc based on content's |
| // (full-page plugins for now only) permissions. |
| int content_restrictions_; |
| |
| DISALLOW_COPY_AND_ASSIGN(CoreTabHelper); |
| }; |
| |
| #endif // CHROME_BROWSER_UI_TAB_CONTENTS_CORE_TAB_HELPER_H_ |