chrome/browser/chromeos/input_method/input_method_manager_impl.h

   1 // Copyright (c) 2012 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_INPUT_METHOD_MANAGER_IMPL_H_
   6 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_IMPL_H_
   7
   8 #include <map>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/memory/scoped_ptr.h"
  13 #include "base/observer_list.h"
  14 #include "base/threading/thread_checker.h"
  15 #include "chrome/browser/chromeos/input_method/candidate_window_controller.h"
  16 #include "chrome/browser/chromeos/input_method/input_method_util.h"
  17 #include "chrome/browser/profiles/profile.h"
  18 #include "ui/base/ime/chromeos/input_method_manager.h"
  19 #include "ui/base/ime/chromeos/input_method_whitelist.h"
  20
  21 namespace chromeos {
  22 class ComponentExtensionIMEManager;
  23 class ComponentExtensionIMEManagerDelegate;
  24 class InputMethodEngine;
  25 namespace input_method {
  26 class InputMethodDelegate;
  27 class ImeKeyboard;
  28
  29 // The implementation of InputMethodManager.
  30 class InputMethodManagerImpl : public InputMethodManager,
  31                                public CandidateWindowController::Observer {
  32  public:
  33   class StateImpl : public InputMethodManager::State {
  34    public:
  35     StateImpl(InputMethodManagerImpl* manager, Profile* profile);
  36
  37     // Init new state as a copy of other.
  38     void InitFrom(const StateImpl& other);
  39
  40     // Returns true if (manager_->state_ == this).
  41     bool IsActive() const;
  42
  43     // Returns human-readable dump (for debug).
  44     std::string Dump() const;
  45
  46     // Adds new input method to given list if possible
  47     bool EnableInputMethodImpl(
  48         const std::string& input_method_id,
  49         std::vector<std::string>* new_active_input_method_ids) const;
  50
  51     // Returns true if |input_method_id| is in |active_input_method_ids|.
  52     bool InputMethodIsActivated(const std::string& input_method_id) const;
  53
  54     // If |current_input_methodid_| is not in |input_method_ids|, switch to
  55     // input_method_ids[0]. If the ID is equal to input_method_ids[N], switch to
  56     // input_method_ids[N+1].
  57     void SwitchToNextInputMethodInternal(
  58         const std::vector<std::string>& input_method_ids,
  59         const std::string& current_input_methodid);
  60
  61     // Returns the IDs of the subset of input methods which are active and are
  62     // associated with |accelerator|. For example,
  63     // { "mozc-hangul", "xkb:kr:kr104:kor" } is returned for
  64     // ui::VKEY_DBE_SBCSCHAR if the two input methods are active.
  65     void GetCandidateInputMethodsForAccelerator(
  66         const ui::Accelerator& accelerator,
  67         std::vector<std::string>* out_candidate_ids);
  68
  69     // Returns true if given input method requires pending extension.
  70     bool MethodAwaitsExtensionLoad(const std::string& input_method_id) const;
  71
  72     // InputMethodManager::State overrides.
  73     scoped_refptr<InputMethodManager::State> Clone() const override;
  74     void AddInputMethodExtension(const std::string& extension_id,
  75                                  const InputMethodDescriptors& descriptors,
  76                                  InputMethodEngineInterface* instance) override;
  77     void RemoveInputMethodExtension(const std::string& extension_id) override;
  78     void ChangeInputMethod(const std::string& input_method_id,
  79                            bool show_message) override;
  80     bool EnableInputMethod(
  81         const std::string& new_active_input_method_id) override;
  82     void EnableLoginLayouts(
  83         const std::string& language_code,
  84         const std::vector<std::string>& initial_layouts) override;
  85     void EnableLockScreenLayouts() override;
  86     void GetInputMethodExtensions(InputMethodDescriptors* result) override;
  87     scoped_ptr<InputMethodDescriptors> GetActiveInputMethods() const override;
  88     const std::vector<std::string>& GetActiveInputMethodIds() const override;
  89     const InputMethodDescriptor* GetInputMethodFromId(
  90         const std::string& input_method_id) const override;
  91     size_t GetNumActiveInputMethods() const override;
  92     void SetEnabledExtensionImes(std::vector<std::string>* ids) override;
  93     void SetInputMethodLoginDefault() override;
  94     void SetInputMethodLoginDefaultFromVPD(const std::string& locale,
  95                                            const std::string& layout) override;
  96     bool CanCycleInputMethod() override;
  97     void SwitchToNextInputMethod() override;
  98     void SwitchToPreviousInputMethod() override;
  99     bool CanSwitchInputMethod(const ui::Accelerator& accelerator) override;
 100     void SwitchInputMethod(const ui::Accelerator& accelerator) override;
 101     InputMethodDescriptor GetCurrentInputMethod() const override;
 102     bool ReplaceEnabledInputMethods(
 103         const std::vector<std::string>& new_active_input_method_ids) override;
 104
 105     // ------------------------- Data members.
 106     Profile* const profile;
 107
 108     // The input method which was/is selected.
 109     InputMethodDescriptor previous_input_method;
 110     InputMethodDescriptor current_input_method;
 111
 112     // The active input method ids cache.
 113     std::vector<std::string> active_input_method_ids;
 114
 115     // The pending input method id for delayed 3rd party IME enabling.
 116     std::string pending_input_method_id;
 117
 118     // The list of enabled extension IMEs.
 119     std::vector<std::string> enabled_extension_imes;
 120
 121     // Extra input methods that have been explicitly added to the menu, such as
 122     // those created by extension.
 123     std::map<std::string, InputMethodDescriptor> extra_input_methods;
 124
 125     InputMethodManagerImpl* const manager_;
 126
 127    protected:
 128     friend base::RefCounted<chromeos::input_method::InputMethodManager::State>;
 129     ~StateImpl() override;
 130   };
 131
 132   // Constructs an InputMethodManager instance. The client is responsible for
 133   // calling |SetUISessionState| in response to relevant changes in browser
 134   // state.
 135   InputMethodManagerImpl(scoped_ptr<InputMethodDelegate> delegate,
 136                          bool enable_extension_loading);
 137   ~InputMethodManagerImpl() override;
 138
 139   // Receives notification of an InputMethodManager::UISessionState transition.
 140   void SetUISessionState(UISessionState new_ui_session);
 141
 142   // InputMethodManager override:
 143   UISessionState GetUISessionState() override;
 144   void AddObserver(InputMethodManager::Observer* observer) override;
 145   void AddCandidateWindowObserver(
 146       InputMethodManager::CandidateWindowObserver* observer) override;
 147   void RemoveObserver(InputMethodManager::Observer* observer) override;
 148   void RemoveCandidateWindowObserver(
 149       InputMethodManager::CandidateWindowObserver* observer) override;
 150   scoped_ptr<InputMethodDescriptors> GetSupportedInputMethods() const override;
 151   void ActivateInputMethodMenuItem(const std::string& key) override;
 152   bool IsISOLevel5ShiftUsedByCurrentInputMethod() const override;
 153   bool IsAltGrUsedByCurrentInputMethod() const override;
 154
 155   ImeKeyboard* GetImeKeyboard() override;
 156   InputMethodUtil* GetInputMethodUtil() override;
 157   ComponentExtensionIMEManager* GetComponentExtensionIMEManager() override;
 158   bool IsLoginKeyboard(const std::string& layout) const override;
 159
 160   bool MigrateInputMethods(std::vector<std::string>* input_method_ids) override;
 161
 162   scoped_refptr<InputMethodManager::State> CreateNewState(
 163       Profile* profile) override;
 164
 165   scoped_refptr<InputMethodManager::State> GetActiveIMEState() override;
 166   void SetState(scoped_refptr<InputMethodManager::State> state) override;
 167
 168   // Sets |candidate_window_controller_|.
 169   void SetCandidateWindowControllerForTesting(
 170       CandidateWindowController* candidate_window_controller);
 171   // Sets |keyboard_|.
 172   void SetImeKeyboardForTesting(ImeKeyboard* keyboard);
 173   // Initialize |component_extension_manager_|.
 174   void InitializeComponentExtensionForTesting(
 175       scoped_ptr<ComponentExtensionIMEManagerDelegate> delegate);
 176
 177  private:
 178   friend class InputMethodManagerImplTest;
 179
 180   // CandidateWindowController::Observer overrides:
 181   void CandidateClicked(int index) override;
 182   void CandidateWindowOpened() override;
 183   void CandidateWindowClosed() override;
 184
 185   // Temporarily deactivates all input methods (e.g. Chinese, Japanese, Arabic)
 186   // since they are not necessary to input a login password. Users are still
 187   // able to use/switch active keyboard layouts (e.g. US qwerty, US dvorak,
 188   // French).
 189   void OnScreenLocked();
 190
 191   // Resumes the original state by activating input methods and/or changing the
 192   // current input method as needed.
 193   void OnScreenUnlocked();
 194
 195   // Returns true if the given input method config value is a string list
 196   // that only contains an input method ID of a keyboard layout.
 197   bool ContainsOnlyKeyboardLayout(const std::vector<std::string>& value);
 198
 199   // Creates and initializes |candidate_window_controller_| if it hasn't been
 200   // done.
 201   void MaybeInitializeCandidateWindowController();
 202
 203   // Returns Input Method that best matches given id.
 204   const InputMethodDescriptor* LookupInputMethod(
 205       const std::string& input_method_id,
 206       StateImpl* state);
 207
 208   // Change system input method.
 209   void ChangeInputMethodInternal(const InputMethodDescriptor& descriptor,
 210                                  Profile* profile,
 211                                  bool show_message,
 212                                  bool notify_menu);
 213
 214   // Loads necessary component extensions.
 215   // TODO(nona): Support dynamical unloading.
 216   void LoadNecessaryComponentExtensions(StateImpl* state);
 217
 218   // Starts or stops the system input method framework as needed.
 219   // (after list of enabled input methods has been updated).
 220   // If state is active, active input method is updated.
 221   void ReconfigureIMFramework(StateImpl* state);
 222
 223   // Record input method usage histograms.
 224   void RecordInputMethodUsage(std::string input_method_id);
 225
 226   scoped_ptr<InputMethodDelegate> delegate_;
 227
 228   // The current UI session status.
 229   UISessionState ui_session_;
 230
 231   // A list of objects that monitor the manager.
 232   base::ObserverList<InputMethodManager::Observer> observers_;
 233   base::ObserverList<CandidateWindowObserver> candidate_window_observers_;
 234
 235   scoped_refptr<StateImpl> state_;
 236
 237   // The candidate window.  This will be deleted when the APP_TERMINATING
 238   // message is sent.
 239   scoped_ptr<CandidateWindowController> candidate_window_controller_;
 240
 241   // An object which provides miscellaneous input method utility functions. Note
 242   // that |util_| is required to initialize |keyboard_|.
 243   InputMethodUtil util_;
 244
 245   // An object which provides component extension ime management functions.
 246   scoped_ptr<ComponentExtensionIMEManager> component_extension_ime_manager_;
 247
 248   // An object for switching XKB layouts and keyboard status like caps lock and
 249   // auto-repeat interval.
 250   scoped_ptr<ImeKeyboard> keyboard_;
 251
 252
 253   // Whether load IME extensions.
 254   bool enable_extension_loading_;
 255
 256   // The engine map from extension_id to an engine.
 257   typedef std::map<std::string, InputMethodEngineInterface*> EngineMap;
 258   typedef std::map<Profile*, EngineMap, ProfileCompare> ProfileEngineMap;
 259   ProfileEngineMap engine_map_;
 260
 261   DISALLOW_COPY_AND_ASSIGN(InputMethodManagerImpl);
 262 };
 263
 264 }  // namespace input_method
 265 }  // namespace chromeos
 266
 267 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_INPUT_METHOD_MANAGER_IMPL_H_