ui/base/ime/chromeos/ime_keyboard_x11.h

   1 // Copyright 2014 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_IME_KEYBOARD_X11_H_
   6 #define UI_BASE_IME_CHROMEOS_IME_KEYBOARD_X11_H_
   7
   8 #include "ui/base/ime/chromeos/ime_keyboard.h"
   9
  10 #include <cstdlib>
  11 #include <cstring>
  12 #include <queue>
  13 #include <set>
  14 #include <utility>
  15
  16 #include "base/bind.h"
  17 #include "base/logging.h"
  18 #include "base/memory/scoped_ptr.h"
  19 #include "base/message_loop/message_loop.h"
  20 #include "base/process/kill.h"
  21 #include "base/process/launch.h"
  22 #include "base/process/process_handle.h"
  23 #include "base/strings/string_util.h"
  24 #include "base/strings/stringprintf.h"
  25 #include "base/sys_info.h"
  26 #include "base/threading/thread_checker.h"
  27 #include "ui/base/ime/ui_base_ime_export.h"
  28
  29 namespace chromeos {
  30 namespace input_method {
  31
  32 class UI_BASE_IME_EXPORT ImeKeyboardX11 : public ImeKeyboard {
  33  public:
  34   ImeKeyboardX11();
  35   ~ImeKeyboardX11() override;
  36
  37   // ImeKeyboard:
  38   bool SetCurrentKeyboardLayoutByName(const std::string& layout_name) override;
  39   bool ReapplyCurrentKeyboardLayout() override;
  40   void ReapplyCurrentModifierLockStatus() override;
  41   void DisableNumLock() override;
  42   void SetCapsLockEnabled(bool enable_caps_lock) override;
  43   bool CapsLockIsEnabled() override;
  44   bool SetAutoRepeatEnabled(bool enabled) override;
  45   bool GetAutoRepeatEnabled() override;
  46   bool SetAutoRepeatRate(const AutoRepeatRate& rate) override;
  47
  48  private:
  49   // Returns a mask for Num Lock (e.g. 1U << 4). Returns 0 on error.
  50   unsigned int GetNumLockMask();
  51
  52   // Sets the caps-lock status. Note that calling this function always disables
  53   // the num-lock.
  54   void SetLockedModifiers();
  55
  56   // This function is used by SetLayout() and RemapModifierKeys(). Calls
  57   // setxkbmap command if needed, and updates the last_full_layout_name_ cache.
  58   bool SetLayoutInternal(const std::string& layout_name, bool force);
  59
  60   // Executes 'setxkbmap -layout ...' command asynchronously using a layout name
  61   // in the |execute_queue_|. Do nothing if the queue is empty.
  62   // TODO(yusukes): Use libxkbfile.so instead of the command (crosbug.com/13105)
  63   void MaybeExecuteSetLayoutCommand();
  64
  65   // Polls to see setxkbmap process exits.
  66   void PollUntilChildFinish(const base::ProcessHandle handle);
  67
  68   // Called when execve'd setxkbmap process exits.
  69   void OnSetLayoutFinish();
  70
  71   const bool is_running_on_chrome_os_;
  72   unsigned int num_lock_mask_;
  73
  74   // A queue for executing setxkbmap one by one.
  75   std::queue<std::string> execute_queue_;
  76
  77   base::ThreadChecker thread_checker_;
  78
  79   base::WeakPtrFactory<ImeKeyboardX11> weak_factory_;
  80
  81   DISALLOW_COPY_AND_ASSIGN(ImeKeyboardX11);
  82 };
  83
  84
  85 } // namespace input_method
  86 } // namespace chromeos
  87
  88 #endif  // UI_BASE_IME_CHROMEOS_IME_KEYBOARD_X11_H_