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_PRINTING_BACKGROUND_PRINTING_MANAGER_H_ 6 #define CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_ 7 8 #include <map> 9 #include <set> 10 11 #include "base/compiler_specific.h" 12 #include "base/threading/non_thread_safe.h" 13 #include "content/public/browser/notification_observer.h" 14 #include "content/public/browser/notification_registrar.h" 15 16 namespace content { 17 class RenderProcessHost; 18 class WebContents; 19 } 20 21 namespace printing { 22 23 // Manages hidden WebContents that prints documents in the background. 24 // The hidden WebContents are no longer part of any Browser / TabStripModel. 25 // The WebContents started life as a ConstrainedWebDialog. 26 // They get deleted when the printing finishes. 27 class BackgroundPrintingManager : public base::NonThreadSafe, 28 public content::NotificationObserver { 29 public: 30 class Observer; 31 typedef std::map<content::WebContents*, Observer*> WebContentsObserverMap; 32 33 BackgroundPrintingManager(); 34 virtual ~BackgroundPrintingManager(); 35 36 // Takes ownership of |preview_dialog| and deletes it when |preview_dialog| 37 // finishes printing. This removes |preview_dialog| from its ConstrainedDialog 38 // and hides it from the user. 39 void OwnPrintPreviewDialog(content::WebContents* preview_dialog); 40 41 // Returns true if |printing_contents_map_| contains |preview_dialog|. 42 bool HasPrintPreviewDialog(content::WebContents* preview_dialog); 43 44 // Let others see the list of background printing contents. 45 std::set<content::WebContents*> CurrentContentSet(); 46 47 private: 48 // content::NotificationObserver overrides: 49 virtual void Observe(int type, 50 const content::NotificationSource& source, 51 const content::NotificationDetails& details) OVERRIDE; 52 53 // Schedule deletion of |preview_contents|. 54 void DeletePreviewContents(content::WebContents* preview_contents); 55 56 // A map from print preview WebContentses (managed by 57 // BackgroundPrintingManager) to the Observers that observe them. 58 WebContentsObserverMap printing_contents_map_; 59 60 content::NotificationRegistrar registrar_; 61 62 DISALLOW_COPY_AND_ASSIGN(BackgroundPrintingManager); 63 }; 64 65 } // namespace printing 66 67 #endif // CHROME_BROWSER_PRINTING_BACKGROUND_PRINTING_MANAGER_H_ 68