Improve perforance for component IME extensions initialization by using map instead of vector in Co…

chromeos/ime/component_extension_ime_manager.h

 // Copyright 2013 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 CHROMEOS_IME_COMPONENT_EXTENSION_IME_MANAGER_H_
 #define CHROMEOS_IME_COMPONENT_EXTENSION_IME_MANAGER_H_
 
+#include <map>
 #include <set>
 
 #include "base/files/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "chromeos/chromeos_export.h"
 #include "chromeos/ime/input_method_descriptor.h"
 
 namespace chromeos {
 
@@ skipping 63 matching lines @@
   // false if already corresponding component extension is unloaded.
   bool UnloadComponentExtensionIME(const std::string& input_method_id);
 
   // Returns true if |input_method_id| is whitelisted component extension input
   // method.
   bool IsWhitelisted(const std::string& input_method_id);
 
   // Returns true if |extension_id| is whitelisted component extension.
   bool IsWhitelistedExtension(const std::string& extension_id);
 
-  // Returns InputMethodId. This function returns empty string if |extension_id|
-  // and |engine_id| is not a whitelisted component extention IME.
-  std::string GetId(const std::string& extension_id,
-                    const std::string& engine_id);
-
-  // Returns localized name of |input_method_id|.
-  std::string GetName(const std::string& input_method_id);
-
-  // Returns localized description of |input_method_id|.
-  std::string GetDescription(const std::string& input_method_id);
-
-  // Returns list of input method id associated with |language|.
-  std::vector<std::string> ListIMEByLanguage(const std::string& language);
-
   // Returns all IME as InputMethodDescriptors.
   input_method::InputMethodDescriptors GetAllIMEAsInputMethodDescriptor();
 
   // Returns all XKB keyboard IME as InputMethodDescriptors.
   input_method::InputMethodDescriptors GetXkbIMEAsInputMethodDescriptor();
 
  private:
   // Finds ComponentExtensionIME and EngineDescription associated with
   // |input_method_id|. This function retruns true if it is found, otherwise
   // returns false. |out_extension| and |out_engine| can be NULL.
   bool FindEngineEntry(const std::string& input_method_id,
-                       ComponentExtensionIME* out_extension,
-                       ComponentExtensionEngine* out_engine);
+                       ComponentExtensionIME* out_extension);
 
   bool IsInLoginLayoutWhitelist(const std::vector<std::string>& layouts);
 
   scoped_ptr<ComponentExtensionIMEManagerDelegate> delegate_;
 
-  std::vector<ComponentExtensionIME> component_extension_imes_;
+  // The map of extension_id to ComponentExtensionIME instance.
+  // It's filled by Initialize() method and never changed during runtime.
+  std::map<std::string, ComponentExtensionIME> component_extension_imes_;
+
+  // For quick check the validity of a given input method id.
+  // It's filled by Initialize() method and never changed during runtime.
+  std::set<std::string> input_method_id_set_;
 
   std::set<std::string> login_layout_set_;
 
   DISALLOW_COPY_AND_ASSIGN(ComponentExtensionIMEManager);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROMEOS_IME_COMPONENT_EXTENSION_IME_MANAGER_H_