chrome/browser/download/download_service.h

   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_DOWNLOAD_DOWNLOAD_SERVICE_H_
   6 #define CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/callback_forward.h"
  10 #include "base/memory/scoped_ptr.h"
  11 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
  12
  13 class ChromeDownloadManagerDelegate;
  14 class DownloadHistory;
  15 class DownloadUIController;
  16 class ExtensionDownloadsEventRouter;
  17 class Profile;
  18
  19 namespace content {
  20 class DownloadManager;
  21 }
  22
  23 // Owning class for ChromeDownloadManagerDelegate.
  24 class DownloadService : public BrowserContextKeyedService {
  25  public:
  26   explicit DownloadService(Profile* profile);
  27   virtual ~DownloadService();
  28
  29   // Get the download manager delegate, creating it if it doesn't already exist.
  30   ChromeDownloadManagerDelegate* GetDownloadManagerDelegate();
  31
  32   // Get the interface to the history system. Returns NULL if profile is
  33   // incognito or if the DownloadManager hasn't been created yet or if there is
  34   // no HistoryService for profile.
  35   DownloadHistory* GetDownloadHistory();
  36
  37 #if !defined(OS_ANDROID)
  38   ExtensionDownloadsEventRouter* GetExtensionEventRouter() {
  39     return extension_event_router_.get();
  40   }
  41 #endif
  42
  43   // Has a download manager been created?
  44   bool HasCreatedDownloadManager();
  45
  46   // Number of non-malicious downloads associated with this instance of the
  47   // service.
  48   int NonMaliciousDownloadCount() const;
  49
  50   // Number of non-malicious downloads associated with all profiles.
  51   static int NonMaliciousDownloadCountAllProfiles();
  52
  53   // Cancels all in-progress downloads.
  54   static void CancelAllDownloads();
  55
  56   // Sets the DownloadManagerDelegate associated with this object and
  57   // its DownloadManager.  Takes ownership of |delegate|, and destroys
  58   // the previous delegate.  For testing.
  59   void SetDownloadManagerDelegateForTesting(
  60       scoped_ptr<ChromeDownloadManagerDelegate> delegate);
  61
  62   // Will be called to release references on other services as part
  63   // of Profile shutdown.
  64   virtual void Shutdown() OVERRIDE;
  65
  66   // Returns false if at least one extension has disabled the shelf, true
  67   // otherwise.
  68   bool IsShelfEnabled();
  69
  70  private:
  71   bool download_manager_created_;
  72   Profile* profile_;
  73
  74   // ChromeDownloadManagerDelegate may be the target of callbacks from
  75   // the history service/DB thread and must be kept alive for those
  76   // callbacks.
  77   scoped_ptr<ChromeDownloadManagerDelegate> manager_delegate_;
  78
  79   scoped_ptr<DownloadHistory> download_history_;
  80
  81   // The UI controller is responsible for observing the download manager and
  82   // notifying the UI of any new downloads. Its lifetime matches that of the
  83   // associated download manager.
  84   scoped_ptr<DownloadUIController> download_ui_;
  85
  86   // On Android, GET downloads are not handled by the DownloadManager.
  87   // Once we have extensions on android, we probably need the EventRouter
  88   // in ContentViewDownloadDelegate which knows about both GET and POST
  89   // downloads.
  90 #if !defined(OS_ANDROID)
  91   // The ExtensionDownloadsEventRouter dispatches download creation, change, and
  92   // erase events to extensions. Like ChromeDownloadManagerDelegate, it's a
  93   // chrome-level concept and its lifetime should match DownloadManager. There
  94   // should be a separate EDER for on-record and off-record managers.
  95   // There does not appear to be a separate ExtensionSystem for on-record and
  96   // off-record profiles, so ExtensionSystem cannot own the EDER.
  97   scoped_ptr<ExtensionDownloadsEventRouter> extension_event_router_;
  98 #endif
  99
 100   DISALLOW_COPY_AND_ASSIGN(DownloadService);
 101 };
 102
 103 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_