1 // Copyright (c) 2011 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 // For print preview, a print preview (PP) tab is linked with the initiator tab 6 // that initiated the printing operation. If the tab initiates a second 7 // printing operation while the first print preview tab is still open, that PP 8 // tab is focused/activated. There may be more than one PP tab open. There is a 9 // 1:1 relationship between PP tabs and initiating tabs. This class manages PP 10 // tabs and initiator tabs. 11 #ifndef CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_ 12 13 #define CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_ 14 #pragma once 15 16 #include <map> 17 18 #include "base/memory/ref_counted.h" 19 #include "chrome/browser/sessions/session_id.h" 20 #include "content/common/notification_observer.h" 21 #include "content/common/notification_registrar.h" 22 23 class Browser; 24 class TabContents; 25 26 namespace printing { 27 28 class PrintPreviewTabController 29 : public base::RefCounted<PrintPreviewTabController>, 30 public NotificationObserver { 31 public: 32 PrintPreviewTabController(); 33 34 virtual ~PrintPreviewTabController(); 35 36 static PrintPreviewTabController* GetInstance(); 37 38 // Initiate print preview for |initiator_tab|. 39 // Call this instead of GetOrCreatePreviewTab(). 40 static void PrintPreview(TabContents* initiator_tab); 41 42 // Get/Create the print preview tab for |initiator_tab|. 43 // Exposed for unit tests. 44 TabContents* GetOrCreatePreviewTab(TabContents* initiator_tab); 45 46 // Returns preview tab for |tab|. 47 // Returns |tab| if |tab| is a preview tab. 48 // Returns NULL if no preview tab exists for |tab|. 49 TabContents* GetPrintPreviewForTab(TabContents* tab) const; 50 51 // Returns initiator tab for |preview_tab|. 52 // Returns NULL if no initiator tab exists for |preview_tab|. 53 TabContents* GetInitiatorTab(TabContents* preview_tab); 54 55 // Notification observer implementation. 56 virtual void Observe(NotificationType type, 57 const NotificationSource& source, 58 const NotificationDetails& details); 59 60 // Returns true if |tab| is a print preview tab. 61 static bool IsPrintPreviewTab(TabContents* tab); 62 63 private: 64 friend class base::RefCounted<PrintPreviewTabController>; 65 66 // 1:1 relationship between initiator tab and print preview tab. 67 // Key: Preview tab. 68 // Value: Initiator tab. 69 typedef std::map<TabContents*, TabContents*> PrintPreviewTabMap; 70 71 // Creates a new print preview tab. 72 TabContents* CreatePrintPreviewTab(TabContents* initiator_tab); 73 74 // Adds/Removes observers for notifications from |tab|. 75 void AddObservers(TabContents* tab); 76 void RemoveObservers(TabContents* tab); 77 78 PrintPreviewTabMap preview_tab_map_; 79 80 // A registrar for listening notifications. 81 NotificationRegistrar registrar_; 82 83 // True if the controller is waiting for a new preview tab via 84 // NavigationType::NEW_PAGE. 85 bool waiting_for_new_preview_page_; 86 87 DISALLOW_COPY_AND_ASSIGN(PrintPreviewTabController); 88 }; 89 90 } // namespace printing 91 92 #endif // CHROME_BROWSER_PRINTING_PRINT_PREVIEW_TAB_CONTROLLER_H_ 93