chrome/browser/chromeos/input_method/component_extension_ime_manager_impl.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_COMPONENT_EXTENSION_IME_MANAGER_IMPL_H_
   6 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_COMPONENT_EXTENSION_IME_MANAGER_IMPL_H_
   7
   8 #include <set>
   9 #include <vector>
  10
  11 #include "base/bind.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "base/sequenced_task_runner.h"
  14 #include "base/threading/thread_checker.h"
  15 #include "base/values.h"
  16 #include "chromeos/ime/component_extension_ime_manager.h"
  17
  18 namespace chromeos {
  19
  20 // The implementation class of ComponentExtensionIMEManagerDelegate.
  21 class ComponentExtensionIMEManagerImpl
  22     : public ComponentExtensionIMEManagerDelegate {
  23  public:
  24   ComponentExtensionIMEManagerImpl();
  25   virtual ~ComponentExtensionIMEManagerImpl();
  26
  27   // ComponentExtensionIMEManagerDelegate overrides:
  28   virtual std::vector<ComponentExtensionIME> ListIME() OVERRIDE;
  29   virtual bool Load(const std::string& extension_id,
  30                     const std::string& manifest,
  31                     const base::FilePath& file_path) OVERRIDE;
  32   virtual bool Unload(const std::string& extension_id,
  33                       const base::FilePath& file_path) OVERRIDE;
  34
  35   // Loads extension list and reads their manifest file. After finished
  36   // initialization, |callback| will be called on original thread.
  37   void InitializeAsync(const base::Closure& callback);
  38
  39   // Returns true if this class is initialized and ready to use, otherwise
  40   // returns false.
  41   bool IsInitialized();
  42
  43  private:
  44   // Reads component extensions and extract their localized information: name,
  45   // description and ime id. This function fills them into |out_imes|. This
  46   // function must be called on file thread.
  47   static void ReadComponentExtensionsInfo(
  48       std::vector<ComponentExtensionIME>* out_imes);
  49
  50   // This function is called on UI thread after ReadComponentExtensionsInfo
  51   // function is finished. No need to release |result|.
  52   void OnReadComponentExtensionsInfo(std::vector<ComponentExtensionIME>* result,
  53                                      const base::Closure& callback);
  54
  55   // Reads manifest.json file in |file_path|. This function must be called on
  56   // file thread.
  57   static scoped_ptr<base::DictionaryValue> GetManifest(
  58       const base::FilePath& file_path);
  59
  60   // Reads extension information: description, option page. This function
  61   // returns true on success, otherwise returns false. This function must be
  62   // called on file thread.
  63   static bool ReadExtensionInfo(const base::DictionaryValue& manifest,
  64                                 const std::string& extension_id,
  65                                 ComponentExtensionIME* out);
  66
  67   // Reads each engine component in |dict|. |dict| is given by GetList with
  68   // kInputComponents key from manifest. This function returns true on success,
  69   // otherwise retrun false. This function must be called on FILE thread.
  70   static bool ReadEngineComponent(const base::DictionaryValue& dict,
  71                                   ComponentExtensionEngine* out);
  72
  73   // True if initialized.
  74   bool is_initialized_;
  75
  76   // The list of component extension IME.
  77   std::vector<ComponentExtensionIME> component_extension_list_;
  78
  79   // The list of already loaded extension ids.
  80   std::set<std::string> loaded_extension_id_;
  81
  82   // For checking the function should be called on UI thread.
  83   base::ThreadChecker thread_checker_;
  84   base::WeakPtrFactory<ComponentExtensionIMEManagerImpl> weak_ptr_factory_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(ComponentExtensionIMEManagerImpl);
  87 };
  88
  89 }  // namespace chromeos
  90
  91 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_COMPONENT_EXTENSION_IME_MANAGER_IMPL_H_
  92