ui/base/ime/chromeos/component_extension_ime_manager.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 UI_BASE_IME_CHROMEOS_COMPONENT_EXTENSION_IME_MANAGER_H_
   6 #define UI_BASE_IME_CHROMEOS_COMPONENT_EXTENSION_IME_MANAGER_H_
   7
   8 #include <map>
   9 #include <set>
  10
  11 #include "base/files/file_path.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/observer_list.h"
  14 #include "ui/base/ime/chromeos/input_method_descriptor.h"
  15 #include "ui/base/ui_base_export.h"
  16
  17 class Profile;
  18
  19 namespace chromeos {
  20
  21 // Represents an engine in component extension IME.
  22 struct UI_BASE_EXPORT ComponentExtensionEngine {
  23   ComponentExtensionEngine();
  24   ~ComponentExtensionEngine();
  25   std::string engine_id;  // The engine id.
  26   std::string display_name;  // The display name.
  27   std::string indicator;  // The indicator text.
  28   std::vector<std::string> language_codes;  // The engine's language(ex. "en").
  29   std::string description;  // The engine description.
  30   std::vector<std::string> layouts;  // The list of keyboard layout of engine.
  31   GURL options_page_url; // an URL to option page.
  32   GURL input_view_url; // an URL to input view page.
  33 };
  34
  35 // Represents a component extension IME.
  36 struct UI_BASE_EXPORT ComponentExtensionIME {
  37   ComponentExtensionIME();
  38   ~ComponentExtensionIME();
  39   std::string id;  // extension id.
  40   std::string manifest;  // the contents of manifest.json
  41   std::string description;  // description of extension.
  42   GURL options_page_url; // an URL to option page.
  43   base::FilePath path;
  44   std::vector<ComponentExtensionEngine> engines;
  45 };
  46
  47 // Provides an interface to list/load/unload for component extension IME.
  48 class UI_BASE_EXPORT ComponentExtensionIMEManagerDelegate {
  49  public:
  50   ComponentExtensionIMEManagerDelegate();
  51   virtual ~ComponentExtensionIMEManagerDelegate();
  52
  53   // Lists installed component extension IMEs.
  54   virtual std::vector<ComponentExtensionIME> ListIME() = 0;
  55
  56   // Loads component extension IME associated with |extension_id|.
  57   // Returns false if it fails, otherwise returns true.
  58   virtual void Load(Profile* profile,
  59                     const std::string& extension_id,
  60                     const std::string& manifest,
  61                     const base::FilePath& path) = 0;
  62
  63   // Unloads component extension IME associated with |extension_id|.
  64   virtual void Unload(Profile* profile,
  65                       const std::string& extension_id,
  66                       const base::FilePath& path) = 0;
  67 };
  68
  69 // This class manages component extension input method.
  70 class UI_BASE_EXPORT ComponentExtensionIMEManager {
  71  public:
  72   ComponentExtensionIMEManager();
  73   virtual ~ComponentExtensionIMEManager();
  74
  75   // Initializes component extension manager. This function create internal
  76   // mapping between input method id and engine components. This function must
  77   // be called before using any other function.
  78   void Initialize(scoped_ptr<ComponentExtensionIMEManagerDelegate> delegate);
  79
  80   // Loads |input_method_id| component extension IME. This function returns true
  81   // on success. This function is safe to call multiple times. Returns false if
  82   // already corresponding component extension is loaded.
  83   bool LoadComponentExtensionIME(Profile* profile,
  84                                  const std::string& input_method_id);
  85
  86   // Unloads |input_method_id| component extension IME. This function returns
  87   // true on success. This function is safe to call multiple times. Returns
  88   // false if already corresponding component extension is unloaded.
  89   bool UnloadComponentExtensionIME(Profile* profile,
  90                                    const std::string& input_method_id);
  91
  92   // Returns true if |input_method_id| is whitelisted component extension input
  93   // method.
  94   bool IsWhitelisted(const std::string& input_method_id);
  95
  96   // Returns true if |extension_id| is whitelisted component extension.
  97   bool IsWhitelistedExtension(const std::string& extension_id);
  98
  99   // Returns all IME as InputMethodDescriptors.
 100   input_method::InputMethodDescriptors GetAllIMEAsInputMethodDescriptor();
 101
 102   // Returns all XKB keyboard IME as InputMethodDescriptors.
 103   input_method::InputMethodDescriptors GetXkbIMEAsInputMethodDescriptor();
 104
 105  private:
 106   // Finds ComponentExtensionIME and EngineDescription associated with
 107   // |input_method_id|. This function retruns true if it is found, otherwise
 108   // returns false. |out_extension| and |out_engine| can be NULL.
 109   bool FindEngineEntry(const std::string& input_method_id,
 110                        ComponentExtensionIME* out_extension);
 111
 112   bool IsInLoginLayoutWhitelist(const std::vector<std::string>& layouts);
 113
 114   scoped_ptr<ComponentExtensionIMEManagerDelegate> delegate_;
 115
 116   // The map of extension_id to ComponentExtensionIME instance.
 117   // It's filled by Initialize() method and never changed during runtime.
 118   std::map<std::string, ComponentExtensionIME> component_extension_imes_;
 119
 120   // For quick check the validity of a given input method id.
 121   // It's filled by Initialize() method and never changed during runtime.
 122   std::set<std::string> input_method_id_set_;
 123
 124   std::set<std::string> login_layout_set_;
 125
 126   DISALLOW_COPY_AND_ASSIGN(ComponentExtensionIMEManager);
 127 };
 128
 129 }  // namespace chromeos
 130
 131 #endif  // UI_BASE_IME_CHROMEOS_COMPONENT_EXTENSION_IME_MANAGER_H_