Policy: Re-enabled plugin still disabled

webkit/plugins/npapi/webplugininfo.h

 // Copyright (c) 2006-2008 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 WEBKIT_PLUGINS_NPAPI_WEBPLUGININFO_H_
 #define WEBKIT_PLUGINS_NPAPI_WEBPLUGININFO_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 13 matching lines @@
 
   // A list of all the file extensions for this mime type.
   std::vector<std::string> file_extensions;
 
   // Description of the mime type.
   string16 description;
 };
 
 // Describes an available NPAPI plugin.
 struct WebPluginInfo {
+  // Defines the possible enabled state a plugin can have.
+  // The enum values actually represent a 3-bit bitfield :
+  // |PE|PD|U| - where |PE|PD| is policy state and U is user state.
+  //    PE == 1 means the plugin is forced to enabled state by policy
+  //    PD == 1 means the plugin is forced to disabled by policy
+  // PE and PD CAN'T be both 1 but can be both 0 which mean no policy is set.
+  //     U == 1 means the user has disabled the plugin.
+  // Because the plugin user state might have been changed before a policy was
+  // introduced the user state might contradict the policy state in which case
+  // the policy has precedence.
+  enum EnabledStates {
+    USER_ENABLED = 0,
+    USER_DISABLED = 1 << 0,
+    POLICY_DISABLED = 1 << 1,
+    POLICY_ENABLED = 1 << 2,
+    USER_ENABLED_POLICY_UNMANAGED = USER_ENABLED,
+    USER_ENABLED_POLICY_DISABLED = USER_ENABLED| POLICY_DISABLED,
+    USER_ENABLED_POLICY_ENABLED = USER_ENABLED | POLICY_ENABLED,
+    USER_DISABLED_POLICY_UNMANAGED = USER_DISABLED,
+    USER_DISABLED_POLICY_DISABLED = USER_DISABLED | POLICY_DISABLED,
+    USER_DISABLED_POLICY_ENABLED = USER_DISABLED | POLICY_ENABLED,
+    USER_MASK = USER_DISABLED,
+    MANAGED_MASK = POLICY_DISABLED | POLICY_ENABLED,
+    POLICY_UNMANAGED = -1
+  };
+
   WebPluginInfo();
   WebPluginInfo(const WebPluginInfo& rhs);
   ~WebPluginInfo();
   WebPluginInfo& operator=(const WebPluginInfo& rhs);
 
   // Special constructor only used during unit testing:
   WebPluginInfo(const string16& fake_name,
                 const FilePath& fake_path,
                 const string16& fake_version,
                 const string16& fake_desc);
 
   // The name of the plugin (i.e. Flash).
   string16 name;
 
   // The path to the plugin file (DLL/bundle/library).
   FilePath path;
 
   // The version number of the plugin file (may be OS-specific)
   string16 version;
 
   // A description of the plugin that we get from its version info.
   string16 desc;
 
   // A list of all the mime types that this plugin supports.
   std::vector<WebPluginMimeType> mime_types;
 
-  // Whether the plugin is enabled.
-  bool enabled;
+  // Enabled state of the plugin. See the EnabledStates enum.
+  int enabled;
 };
 
+// Checks wheter a plugin is enabled either by the user or by policy.
+bool IsPluginEnabled(const WebPluginInfo& plugin);
+
 }  // namespace npapi
 }  // namespace webkit
 
 #endif  // WEBKIT_PLUGINS_NPAPI_WEBPLUGININFO_H_