chrome/browser/dom_distiller/lazy_dom_distiller_service.h

   1 // Copyright 2014 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_DOM_DISTILLER_LAZY_DOM_DISTILLER_SERVICE_H_
   6 #define CHROME_BROWSER_DOM_DISTILLER_LAZY_DOM_DISTILLER_SERVICE_H_
   7
   8 #include "components/dom_distiller/core/dom_distiller_service.h"
   9 #include "components/dom_distiller/core/task_tracker.h"
  10 #include "content/public/browser/notification_observer.h"
  11 #include "content/public/browser/notification_registrar.h"
  12
  13 namespace content {
  14 class NotificationSource;
  15 class NotificationDetails;
  16 }  // namespace content
  17
  18 class Profile;
  19
  20 namespace dom_distiller {
  21
  22 class DomDistillerServiceFactory;
  23
  24 // A class which helps with lazy instantiation of the DomDistillerService, using
  25 // the BrowserContextKeyedServiceFactory for it. This class will delete itself
  26 // when the profile is destroyed.
  27 class LazyDomDistillerService : public DomDistillerServiceInterface,
  28                                 public content::NotificationObserver {
  29  public:
  30   LazyDomDistillerService(Profile* profile,
  31                           const DomDistillerServiceFactory* service_factory);
  32   virtual ~LazyDomDistillerService();
  33
  34  public:
  35   // DomDistillerServiceInterface implementation:
  36   virtual syncer::SyncableService* GetSyncableService() const OVERRIDE;
  37   virtual const std::string AddToList(
  38       const GURL& url,
  39       scoped_ptr<DistillerPage> distiller_page,
  40       const ArticleAvailableCallback& article_cb) OVERRIDE;
  41   virtual std::vector<ArticleEntry> GetEntries() const OVERRIDE;
  42   virtual scoped_ptr<ArticleEntry> RemoveEntry(
  43       const std::string& entry_id) OVERRIDE;
  44   virtual scoped_ptr<ViewerHandle> ViewEntry(
  45       ViewRequestDelegate* delegate,
  46       scoped_ptr<DistillerPage> distiller_page,
  47       const std::string& entry_id) OVERRIDE;
  48   virtual scoped_ptr<ViewerHandle> ViewUrl(
  49       ViewRequestDelegate* delegate,
  50       scoped_ptr<DistillerPage> distiller_page,
  51       const GURL& url) OVERRIDE;
  52   virtual scoped_ptr<DistillerPage> CreateDefaultDistillerPage() OVERRIDE;
  53   virtual void AddObserver(DomDistillerObserver* observer) OVERRIDE;
  54   virtual void RemoveObserver(DomDistillerObserver* observer) OVERRIDE;
  55
  56  private:
  57   // Accessor method for the backing service instance.
  58   DomDistillerServiceInterface* instance() const;
  59
  60   // content::NotificationObserver implementation:
  61   virtual void Observe(int type,
  62                        const content::NotificationSource& source,
  63                        const content::NotificationDetails& details) OVERRIDE;
  64
  65   // The Profile to use when retrieving the DomDistillerService and also the
  66   // profile to listen for destruction of.
  67   Profile* profile_;
  68
  69   // A BrowserContextKeyedServiceFactory for the DomDistillerService.
  70   const DomDistillerServiceFactory* service_factory_;
  71
  72   // Used to track when the profile is shut down.
  73   content::NotificationRegistrar registrar_;
  74
  75   DISALLOW_COPY_AND_ASSIGN(LazyDomDistillerService);
  76 };
  77
  78 }  // namespace dom_distiller
  79
  80 #endif  // CHROME_BROWSER_DOM_DISTILLER_LAZY_DOM_DISTILLER_SERVICE_H_