TODO

chrome/browser/extensions/extension_content_settings_store.h

+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_CONTENT_SETTINGS_STORE_H_
+#define CHROME_BROWSER_EXTENSIONS_EXTENSION_CONTENT_SETTINGS_STORE_H_
+
+#include <list>
+#include <map>
+#include <string>
+
+#include "base/observer_list.h"
+#include "base/time.h"
+#include "base/tuple.h"
+#include "chrome/browser/content_settings/content_settings_base.h"
+#include "chrome/browser/content_settings/content_settings_pattern.h"
+#include "chrome/common/content_settings.h"
+#include "googleurl/src/gurl.h"
+
+class ExtensionContentSettingsStore {
+ public:
+
+  class Observer {
+   public:
+    virtual ~Observer();
+
+    // Called when a default setting changes in the
+    // ExtensionContentSettingsStore.
+    virtual void OnDefaultContentSettingChanged(
+        const ContentSettingsType& type,
+        ContentSetting setting) = 0;
+
+    // Called when a content setting changes in the
+    // ExtensionContentSettingsStore.
+    virtual void OnContentSettingChanged(
+        const ContentSettingsPattern& pattern,
+        const ContentSettingsPattern& embedder_pattern,
+        const ContentSettingsType& type,
+        const content_settings::ResourceIdentifier& identifier,
+        ContentSetting setting,
+        bool incognito) = 0;
+
+    // Called when the ExtensionContentSettingsStore is being destroyed. When
+    // called, observers must unsubscribe.
+    virtual void OnDestruction() = 0;
+  };
+
+  ExtensionContentSettingsStore();
+  virtual ~ExtensionContentSettingsStore();
+
+  // //////////////////////////////////////////////////////////////////////////
+
+  void SetExtensionDefaultContentSetting(ContentSettingsType content_type,
+                                         ContentSetting setting);
+
+  ContentSetting GetEffectiveDefaultContentSetting(
+      ContentSettingsType content_type);
+
+  // Sets the content |setting| for |pattern| of extension |ext_id|. The
+  // |incognito| flag allow to set whether the provided setting is for
+  // incognito mode only.
+  // Precondition: the extension must be registered.
+  void SetExtensionContentSetting(
+      const std::string& ext_id,
+      const ContentSettingsPattern& pattern,
+      const ContentSettingsPattern& embedder_pattern,
+      const ContentSettingsType& type,
+      const content_settings::ResourceIdentifier& identifier,
+      ContentSetting setting,
+      bool incognito);
+
+  ContentSetting GetEffectiveContentSetting(
+      const GURL& url,
+      const GURL& embedder_url,
+      const ContentSettingsType& type,
+      const content_settings::ResourceIdentifier& identifier,
+      bool incognito) const;
+
+  // TODO(markusheintz): More content settings API backend stuff goes here.
+
+  // //////////////////////////////////////////////////////////////////////////
+
+  // Registers the time when an extension |ext_id| is installed.
+  void RegisterExtension(const std::string& ext_id,
+                         const base::Time& install_time,
+                         bool is_enabled);
+
+  // Deletes all entries related to extension |ext_id|.
+  void UnregisterExtension(const std::string& ext_id);
+
+  // Hides or makes the extension content settings of the specified extension
+  // visible.
+  void SetExtensionState(const std::string& ext_id, bool is_enabled);
+
+  // Adds |observer|.
+  void AddObserver(Observer* observer);
+
+  // Remove |observer|.
+  void RemoveObserver(Observer* observer);
+
+ private:
+  struct ExtensionEntry;
+
+  typedef std::map<std::string, ExtensionEntry*> ExtensionEntryMap;
+
+  typedef Tuple5<ContentSettingsPattern,
+               ContentSettingsPattern,
+               ContentSettingsType,
+               content_settings::ResourceIdentifier,
+               ContentSetting> ContentSettingSpec;
+
+  typedef std::list<ContentSettingSpec> ContentSettingSpecList;
+
+  ContentSetting GetContentSettingFrom (
+      const GURL& url,
+      const GURL& embedder_url,
+      const ContentSettingsType& type,
+      const content_settings::ResourceIdentifier& identifier,
+      const ContentSettingSpecList* setting_spec_list) const;
+
+  ContentSettingSpecList* GetContentSettingSpecList(
+      const std::string& ext_id,
+      bool incognito);
+
+  const ContentSettingSpecList* GetContentSettingSpecList(
+      const std::string& ext_id,
+      bool incognito) const;
+
+  void NotifyOfContentSettingChanged(
+      const ContentSettingsPattern& pattern,
+      const ContentSettingsPattern& embedder_pattern,
+      const ContentSettingsType& type,
+      const content_settings::ResourceIdentifier& identifier,
+      ContentSetting setting,
+      bool incognito);
+
+  void NotifyOfDestruction();
+
+  ExtensionEntryMap entries_;
+
+  ObserverList<Observer, true> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(ExtensionContentSettingsStore);
+};
+
+#endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_CONTENT_SETTINGS_STORE_H_