Implement HostContentSettingsMap

This map stores whether a given host may load images or use plugins and javascript. And makes this information available to the render view

BUG=32782
TEST=none

Review URL: http://codereview.chromium.org/551149

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@37508 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 98 insertions, 0 deletions

diff --git a/chrome/browser/host_content_settings_map.h b/chrome/browser/host_content_settings_map.h
new file mode 100644
index 0000000..bed78b5
--- /dev/null
+++ b/chrome/browser/host_content_settings_map.h
@@ -0,0 +1,98 @@
+// Copyright (c) 2010 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.
+
+// Maps hostnames to custom zoom levels.  Written on the UI thread and read on
+// the IO thread.  One instance per profile.
+
+#ifndef CHROME_BROWSER_HOST_CONTENT_SETTINGS_MAP_H_
+#define CHROME_BROWSER_HOST_CONTENT_SETTINGS_MAP_H_
+
+#include <map>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/lock.h"
+#include "chrome/common/content_permission_types.h"
+
+class PrefService;
+class Profile;
+
+class HostContentSettingsMap {
+ public:
+  typedef std::map<std::string, ContentPermissionType> HostContentPermissions;
+
+  explicit HostContentSettingsMap(Profile* profile);
+
+  static void RegisterUserPrefs(PrefService* prefs);
+
+  void ResetToDefaults();
+
+  // Returns a map of all hostnames with per host content settings to
+  // their respective settings where a given |content_type| differs
+  // from CONTENT_PERMISSION_TYPE_DEFAULT
+  //
+  // This may be called on any thread.
+  HostContentPermissions GetAllPerHostContentPermissions(
+      ContentSettingsType content_type) const;
+
+  // Returns the default ContentPermissions for a specific ContentSettingsType.
+  //
+  // This may be called on any thread.
+  ContentPermissionType GetDefaultContentPermission(
+      ContentSettingsType type) const {
+    return default_content_settings_.permissions[type];
+  }
+
+  // Returns the ContentPermissions for a specific ContentSettingsType.
+  //
+  // This may be called on any thread.
+  ContentPermissionType GetPerHostContentPermission(const std::string& host,
+      ContentSettingsType type) const {
+    return GetPerHostContentSettings(host).permissions[type];
+  }
+
+  // Returns the ContentPermissions which apply to a given host.
+  //
+  // This may be called on any thread.
+  ContentPermissions GetPerHostContentSettings(const std::string& host) const;
+
+  // Sets the default ContentPermissions. Returns true on success.
+  //
+  // This should only be called on the UI thread.
+  bool SetDefaultContentPermission(ContentSettingsType type,
+                                   ContentPermissionType permission);
+
+  // Sets per host ContentPermissions for a given host and CotentSettings. To
+  // remove an exception for the host, set the permissions to
+  // CONTENT_PERMISSIONS_TYPE_DEFAULT.
+  //
+  // This should only be called on the UI thread.
+  void SetPerHostContentPermission(const std::string& host,
+                                   ContentSettingsType type,
+                                   ContentPermissionType permission);
+
+  // Sets per host ContentPermissions for a given host.
+  //
+  // This should only be called on the UI thread.
+  void SetPerHostContentSettings(const std::string& host,
+                                 const ContentPermissions& permissions);
+
+ private:
+  typedef std::map<std::string, ContentPermissions> HostContentSettings;
+
+  // The profile we're associated with.
+  Profile* profile_;
+
+  // Copy of the pref data, so that we can read it on the IO thread.
+  HostContentSettings host_content_settings_;
+  ContentPermissions default_content_settings_;
+
+  // Used around accesses to |host_content_settings_| to guarantee thread
+  // safety.
+  mutable Lock lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(HostContentSettingsMap);
+};
+
+#endif  // CHROME_BROWSER_HOST_CONTENT_SETTINGS_MAP_H_