Implement ComponentExtensionIMEManagerDelegate.

chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.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 CHROME_BROWSER_CHROMEOS_INPUT_METHOD_COMPONENT_EXTENSION_IME_MANAGER_IMPL_H_
+#define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_COMPONENT_EXTENSION_IME_MANAGER_IMPL_H_
+
+#include <set>
+#include <vector>
+
+#include "base/bind.h"
+#include "base/memory/weak_ptr.h"
+#include "base/sequenced_task_runner.h"
+#include "base/threading/thread_checker.h"
+#include "base/values.h"
+#include "chromeos/ime/component_extension_ime_manager.h"
+
+namespace chromeos {
+
+// The implementation class of ComponentExtentionIMEManagerDelegate.
+class ComponentExtentionIMEManagerImpl :
+  public ComponentExtentionIMEManagerDelegate {
+ public:
+  ComponentExtentionIMEManagerImpl();
+  virtual ~ComponentExtentionIMEManagerImpl();
+
+  // ComponentExtentionIMEManagerDelegate overrides:
+  virtual std::vector<ComponentExtensionIME> ListIME() OVERRIDE;
+  virtual bool Load(const std::string& extension_id,
+                    const base::FilePath& file_path) OVERRIDE;
+  virtual bool Unload(const std::string& extension_id,
+                      const base::FilePath& file_path) OVERRIDE;
+
+  // Loads extension list and reads their manifest file. After finished
+  // initialization, |callback| will be called on original thread.
+  void Initialize(
+      const scoped_refptr<base::SequencedTaskRunner>& file_task_runner,
+      const base::Closure& callback);
+
+  // Returns true if this class is initialized and ready to use, otherwise
+  // returns false.
+  bool IsInitialized();
+
+ private:
+  // Reads component extensions and extract their localized information: name,
+  // description and ime id. This function fills them into |out_imes|. This
+  // function must be called on file thread.
+  static void ReadComponentExtensionsInfo(
+      std::vector<ComponentExtensionIME>* out_imes);
+
+  // This function is called on UI thread after ReadComponentExtensionsInfo
+  // function is finished. No need to release |result|.
+  void OnReadComponentExtensionsInfo(std::vector<ComponentExtensionIME>* result,
+                                     const base::Closure& callback);
+
+  // Reads manifest.json file in |file_path|. This function must be called on
+  // file thread.
+  static scoped_ptr<DictionaryValue> GetManifest(
+      const base::FilePath& file_path);
+
+  // Reads extension information: description, option page. This function
+  // returns true on success, otherwise returns false. This function must be
+  // called on file thread.
+  static bool ReadExtensionInfo(const DictionaryValue& manifest,
+                                      ComponentExtensionIME* out);
+
+  // Reads each engine component in |dict|. |dict| is given by GetList with
+  // kInputComponents key from manifest. This function returns true on success,
+  // otherwise retrun false. This function must be called on file thread.
+  static bool ReadEngineComponent(const DictionaryValue& dict,
+                                  IBusComponent::EngineDescription* out);
+
+  // True if initialized.
+  bool is_initialized_;
+
+  // The list of component extension IME.
+  std::vector<ComponentExtensionIME> component_extension_list_;
+
+  // The list of already loaded extension ids.
+  std::set<std::string> loaded_extension_id_;
+
+  base::ThreadChecker thread_checker_;
+  base::WeakPtrFactory<ComponentExtentionIMEManagerImpl> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ComponentExtentionIMEManagerImpl);
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_COMPONENT_EXTENSION_IME_MANAGER_IMPL_H_
+