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      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 #ifndef CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_NOTIFICATION_PROVIDER_H_
      6 #define CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_NOTIFICATION_PROVIDER_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/memory/ref_counted.h"
     13 #include "chrome/browser/content_settings/content_settings_provider.h"
     14 #include "chrome/browser/prefs/pref_change_registrar.h"
     15 #include "content/common/notification_observer.h"
     16 #include "content/common/notification_registrar.h"
     17 
     18 class GURL;
     19 class PrefService;
     20 class Profile;
     21 
     22 namespace content_settings {
     23 
     24 class NotificationProvider : public ProviderInterface,
     25                              public NotificationObserver {
     26  public:
     27   static void RegisterUserPrefs(PrefService* user_prefs);
     28 
     29   static ContentSettingsPattern ToContentSettingsPattern(const GURL& origin);
     30 
     31   static GURL ToGURL(const ContentSettingsPattern& pattern);
     32 
     33   explicit NotificationProvider(Profile* profile);
     34 
     35   virtual ~NotificationProvider();
     36 
     37   // ProviderInterface implementation
     38   virtual bool ContentSettingsTypeIsManaged(
     39       ContentSettingsType content_type);
     40 
     41   virtual ContentSetting GetContentSetting(
     42       const GURL& requesting_url,
     43       const GURL& embedding_url,
     44       ContentSettingsType content_type,
     45       const ResourceIdentifier& resource_identifier) const;
     46 
     47   virtual void SetContentSetting(
     48       const ContentSettingsPattern& requesting_url_pattern,
     49       const ContentSettingsPattern& embedding_url_pattern,
     50       ContentSettingsType content_type,
     51       const ResourceIdentifier& resource_identifier,
     52       ContentSetting content_setting);
     53 
     54   virtual void GetAllContentSettingsRules(
     55       ContentSettingsType content_type,
     56       const ResourceIdentifier& resource_identifier,
     57       Rules* content_setting_rules) const;
     58 
     59   virtual void ClearAllContentSettingsRules(
     60       ContentSettingsType content_type);
     61 
     62   virtual void ResetToDefaults();
     63 
     64   // NotificationObserver implementation.
     65   virtual void Observe(NotificationType type,
     66                        const NotificationSource& source,
     67                        const NotificationDetails& details);
     68  private:
     69   void StartObserving();
     70   void StopObserving();
     71 
     72   void OnPrefsChanged(const std::string& pref_name);
     73 
     74   // Notifies the observers when permissions settings change.
     75   void NotifySettingsChange();
     76 
     77   // Returns all origins that explicitly have been allowed.
     78   std::vector<GURL> GetAllowedOrigins() const;
     79 
     80   // Returns all origins that explicitly have been denied.
     81   std::vector<GURL> GetBlockedOrigins() const;
     82 
     83   // Methods to setup and modify permission preferences.
     84   void GrantPermission(const GURL& origin);
     85   void DenyPermission(const GURL& origin);
     86 
     87   void PersistPermissionChange(const GURL& origin, bool is_allowed);
     88 
     89   ContentSetting GetContentSetting(const GURL& origin) const;
     90 
     91   // Removes an origin from the "explicitly allowed" set.
     92   void ResetAllowedOrigin(const GURL& origin);
     93 
     94   // Removes an origin from the "explicitly denied" set.
     95   void ResetBlockedOrigin(const GURL& origin);
     96 
     97   // Clears the sets of explicitly allowed and denied origins.
     98   void ResetAllOrigins();
     99 
    100   Profile* profile_;
    101 
    102   PrefChangeRegistrar prefs_registrar_;
    103   NotificationRegistrar notification_registrar_;
    104 
    105   DISALLOW_COPY_AND_ASSIGN(NotificationProvider);
    106 };
    107 
    108 }  // namespace content_settings
    109 
    110 #endif  // CHROME_BROWSER_CONTENT_SETTINGS_CONTENT_SETTINGS_NOTIFICATION_PROVIDER_H_
    111