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/keyed_service/core/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 namespace extensions {
  24 class ExtensionDownloadsEventRouter;
  25 }
  26
  27 // Owning class for ChromeDownloadManagerDelegate.
  28 class DownloadService : public KeyedService {
  29  public:
  30   explicit DownloadService(Profile* profile);
  31   ~DownloadService() override;
  32
  33   // Get the download manager delegate, creating it if it doesn't already exist.
  34   ChromeDownloadManagerDelegate* GetDownloadManagerDelegate();
  35
  36   // Get the interface to the history system. Returns NULL if profile is
  37   // incognito or if the DownloadManager hasn't been created yet or if there is
  38   // no HistoryService for profile. Virtual for testing.
  39   virtual DownloadHistory* GetDownloadHistory();
  40
  41 #if defined(ENABLE_EXTENSIONS)
  42   extensions::ExtensionDownloadsEventRouter* GetExtensionEventRouter() {
  43     return extension_event_router_.get();
  44   }
  45 #endif
  46
  47   // Has a download manager been created?
  48   bool HasCreatedDownloadManager();
  49
  50   // Number of non-malicious downloads associated with this instance of the
  51   // service.
  52   int NonMaliciousDownloadCount() const;
  53
  54   // Cancels all in-progress downloads for this profile.
  55   void CancelDownloads();
  56
  57   // Number of non-malicious downloads associated with all profiles.
  58   static int NonMaliciousDownloadCountAllProfiles();
  59
  60   // Cancels all in-progress downloads for all profiles.
  61   static void CancelAllDownloads();
  62
  63   // Sets the DownloadManagerDelegate associated with this object and
  64   // its DownloadManager.  Takes ownership of |delegate|, and destroys
  65   // the previous delegate.  For testing.
  66   void SetDownloadManagerDelegateForTesting(
  67       scoped_ptr<ChromeDownloadManagerDelegate> delegate);
  68
  69   // Will be called to release references on other services as part
  70   // of Profile shutdown.
  71   void Shutdown() override;
  72
  73   // Returns false if at least one extension has disabled the shelf, true
  74   // otherwise.
  75   bool IsShelfEnabled();
  76
  77  private:
  78   bool download_manager_created_;
  79   Profile* profile_;
  80
  81   // ChromeDownloadManagerDelegate may be the target of callbacks from
  82   // the history service/DB thread and must be kept alive for those
  83   // callbacks.
  84   scoped_ptr<ChromeDownloadManagerDelegate> manager_delegate_;
  85
  86   scoped_ptr<DownloadHistory> download_history_;
  87
  88   // The UI controller is responsible for observing the download manager and
  89   // notifying the UI of any new downloads. Its lifetime matches that of the
  90   // associated download manager.
  91   // Note on destruction order: download_ui_ depends on download_history_ and
  92   // should be destroyed before the latter.
  93   scoped_ptr<DownloadUIController> download_ui_;
  94
  95   // On Android, GET downloads are not handled by the DownloadManager.
  96   // Once we have extensions on android, we probably need the EventRouter
  97   // in ContentViewDownloadDelegate which knows about both GET and POST
  98   // downloads.
  99 #if defined(ENABLE_EXTENSIONS)
 100   // The ExtensionDownloadsEventRouter dispatches download creation, change, and
 101   // erase events to extensions. Like ChromeDownloadManagerDelegate, it's a
 102   // chrome-level concept and its lifetime should match DownloadManager. There
 103   // should be a separate EDER for on-record and off-record managers.
 104   // There does not appear to be a separate ExtensionSystem for on-record and
 105   // off-record profiles, so ExtensionSystem cannot own the EDER.
 106   scoped_ptr<extensions::ExtensionDownloadsEventRouter> extension_event_router_;
 107 #endif
 108
 109   DISALLOW_COPY_AND_ASSIGN(DownloadService);
 110 };
 111
 112 #endif  // CHROME_BROWSER_DOWNLOAD_DOWNLOAD_SERVICE_H_