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| 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 #include "chromeos/ime/xkeyboard.h" | |
| 6 | |
| 7 #include <cstdlib> | |
| 8 #include <cstring> | |
| 9 #include <queue> | |
| 10 #include <set> | |
| 11 #include <utility> | |
| 12 | |
| 13 #include "base/bind.h" | |
| 14 #include "base/logging.h" | |
| 15 #include "base/memory/scoped_ptr.h" | |
| 16 #include "base/message_loop/message_loop.h" | |
| 17 #include "base/process/kill.h" | |
| 18 #include "base/process/launch.h" | |
| 19 #include "base/process/process_handle.h" | |
| 20 #include "base/strings/string_util.h" | |
| 21 #include "base/strings/stringprintf.h" | |
| 22 #include "base/sys_info.h" | |
| 23 #include "base/threading/thread_checker.h" | |
| 24 | |
| 25 // These includes conflict with base/tracked_objects.h so must come last. | |
| 26 #include <X11/XKBlib.h> | |
| 27 #include <X11/Xlib.h> | |
| 28 | |
| 29 namespace chromeos { | |
| 30 namespace input_method { | |
| 31 namespace { | |
| 32 | |
| 33 Display* GetXDisplay() { | |
| 34 return base::MessagePumpForUI::GetDefaultXDisplay(); | |
| 35 } | |
| 36 | |
| 37 // The delay in milliseconds that we'll wait between checking if | |
| 38 // setxkbmap command finished. | |
| 39 const int kSetLayoutCommandCheckDelayMs = 100; | |
| 40 | |
| 41 // The command we use to set the current XKB layout and modifier key mapping. | |
| 42 // TODO(yusukes): Use libxkbfile.so instead of the command (crosbug.com/13105) | |
| 43 const char kSetxkbmapCommand[] = "/usr/bin/setxkbmap"; | |
| 44 | |
| 45 // A string for obtaining a mask value for Num Lock. | |
| 46 const char kNumLockVirtualModifierString[] = "NumLock"; | |
| 47 | |
| 48 const char *kISOLevel5ShiftLayoutIds[] = { | |
| 49 "ca(multix)", | |
| 50 "de(neo)", | |
| 51 }; | |
| 52 | |
| 53 const char *kAltGrLayoutIds[] = { | |
| 54 "be", | |
| 55 "be", | |
| 56 "be", | |
| 57 "bg", | |
| 58 "bg(phonetic)", | |
| 59 "br", | |
| 60 "ca", | |
| 61 "ca(eng)", | |
| 62 "ca(multix)", | |
| 63 "ch", | |
| 64 "ch(fr)", | |
| 65 "cz", | |
| 66 "de", | |
| 67 "de(neo)", | |
| 68 "dk", | |
| 69 "ee", | |
| 70 "es", | |
| 71 "es(cat)", | |
| 72 "fi", | |
| 73 "fr", | |
| 74 "gb(dvorak)", | |
| 75 "gb(extd)", | |
| 76 "gr", | |
| 77 "hr", | |
| 78 "il", | |
| 79 "it", | |
| 80 "latam", | |
| 81 "lt", | |
| 82 "no", | |
| 83 "pl", | |
| 84 "pt", | |
| 85 "ro", | |
| 86 "se", | |
| 87 "si", | |
| 88 "sk", | |
| 89 "tr", | |
| 90 "ua", | |
| 91 "us(altgr-intl)", | |
| 92 "us(intl)", | |
| 93 }; | |
| 94 | |
| 95 | |
| 96 // Returns false if |layout_name| contains a bad character. | |
| 97 bool CheckLayoutName(const std::string& layout_name) { | |
| 98 static const char kValidLayoutNameCharacters[] = | |
| 99 "abcdefghijklmnopqrstuvwxyz0123456789()-_"; | |
| 100 | |
| 101 if (layout_name.empty()) { | |
| 102 DVLOG(1) << "Invalid layout_name: " << layout_name; | |
| 103 return false; | |
| 104 } | |
| 105 | |
| 106 if (layout_name.find_first_not_of(kValidLayoutNameCharacters) != | |
| 107 std::string::npos) { | |
| 108 DVLOG(1) << "Invalid layout_name: " << layout_name; | |
| 109 return false; | |
| 110 } | |
| 111 | |
| 112 return true; | |
| 113 } | |
| 114 | |
| 115 class XKeyboardImpl : public XKeyboard { | |
| 116 public: | |
| 117 XKeyboardImpl(); | |
| 118 virtual ~XKeyboardImpl() {} | |
| 119 | |
| 120 // Overridden from XKeyboard: | |
| 121 virtual bool SetCurrentKeyboardLayoutByName( | |
| 122 const std::string& layout_name) OVERRIDE; | |
| 123 virtual bool ReapplyCurrentKeyboardLayout() OVERRIDE; | |
| 124 virtual void ReapplyCurrentModifierLockStatus() OVERRIDE; | |
| 125 virtual void DisableNumLock() OVERRIDE; | |
| 126 virtual void SetCapsLockEnabled(bool enable_caps_lock) OVERRIDE; | |
| 127 virtual bool CapsLockIsEnabled() OVERRIDE; | |
| 128 virtual bool IsISOLevel5ShiftAvailable() const OVERRIDE; | |
| 129 virtual bool IsAltGrAvailable() const OVERRIDE; | |
| 130 virtual bool SetAutoRepeatEnabled(bool enabled) OVERRIDE; | |
| 131 virtual bool SetAutoRepeatRate(const AutoRepeatRate& rate) OVERRIDE; | |
| 132 | |
| 133 private: | |
| 134 // Returns a mask for Num Lock (e.g. 1U << 4). Returns 0 on error. | |
| 135 unsigned int GetNumLockMask(); | |
| 136 | |
| 137 // Sets the caps-lock status. Note that calling this function always disables | |
| 138 // the num-lock. | |
| 139 void SetLockedModifiers(bool caps_lock_enabled); | |
| 140 | |
| 141 // This function is used by SetLayout() and RemapModifierKeys(). Calls | |
| 142 // setxkbmap command if needed, and updates the last_full_layout_name_ cache. | |
| 143 bool SetLayoutInternal(const std::string& layout_name, bool force); | |
| 144 | |
| 145 // Executes 'setxkbmap -layout ...' command asynchronously using a layout name | |
| 146 // in the |execute_queue_|. Do nothing if the queue is empty. | |
| 147 // TODO(yusukes): Use libxkbfile.so instead of the command (crosbug.com/13105) | |
| 148 void MaybeExecuteSetLayoutCommand(); | |
| 149 | |
| 150 // Polls to see setxkbmap process exits. | |
| 151 void PollUntilChildFinish(const base::ProcessHandle handle); | |
| 152 | |
| 153 // Called when execve'd setxkbmap process exits. | |
| 154 void OnSetLayoutFinish(); | |
| 155 | |
| 156 const bool is_running_on_chrome_os_; | |
| 157 unsigned int num_lock_mask_; | |
| 158 | |
| 159 // The current Caps Lock status. If true, enabled. | |
| 160 bool current_caps_lock_status_; | |
| 161 | |
| 162 // The XKB layout name which we set last time like "us" and "us(dvorak)". | |
| 163 std::string current_layout_name_; | |
| 164 | |
| 165 // A queue for executing setxkbmap one by one. | |
| 166 std::queue<std::string> execute_queue_; | |
| 167 | |
| 168 base::ThreadChecker thread_checker_; | |
| 169 | |
| 170 base::WeakPtrFactory<XKeyboardImpl> weak_factory_; | |
| 171 | |
| 172 DISALLOW_COPY_AND_ASSIGN(XKeyboardImpl); | |
| 173 }; | |
| 174 | |
| 175 XKeyboardImpl::XKeyboardImpl() | |
| 176 : is_running_on_chrome_os_(base::SysInfo::IsRunningOnChromeOS()), | |
| 177 weak_factory_(this) { | |
| 178 // X must be already initialized. | |
| 179 CHECK(GetXDisplay()); | |
| 180 | |
| 181 num_lock_mask_ = GetNumLockMask(); | |
| 182 | |
| 183 if (is_running_on_chrome_os_) { | |
| 184 // Some code seems to assume that Mod2Mask is always assigned to | |
| 185 // Num Lock. | |
| 186 // | |
| 187 // TODO(yusukes): Check the assumption is really okay. If not, | |
| 188 // modify the Aura code, and then remove the CHECK below. | |
| 189 LOG_IF(ERROR, num_lock_mask_ != Mod2Mask) | |
| 190 << "NumLock is not assigned to Mod2Mask. : " << num_lock_mask_; | |
| 191 } | |
| 192 | |
| 193 current_caps_lock_status_ = CapsLockIsEnabled(); | |
| 194 } | |
| 195 | |
| 196 unsigned int XKeyboardImpl::GetNumLockMask() { | |
| 197 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 198 static const unsigned int kBadMask = 0; | |
| 199 | |
| 200 unsigned int real_mask = kBadMask; | |
| 201 XkbDescPtr xkb_desc = | |
| 202 XkbGetKeyboard(GetXDisplay(), XkbAllComponentsMask, XkbUseCoreKbd); | |
| 203 if (!xkb_desc) | |
| 204 return kBadMask; | |
| 205 | |
| 206 if (xkb_desc->dpy && xkb_desc->names) { | |
| 207 const std::string string_to_find(kNumLockVirtualModifierString); | |
| 208 for (size_t i = 0; i < XkbNumVirtualMods; ++i) { | |
| 209 const unsigned int virtual_mod_mask = 1U << i; | |
| 210 char* virtual_mod_str_raw_ptr = | |
| 211 XGetAtomName(xkb_desc->dpy, xkb_desc->names->vmods[i]); | |
| 212 if (!virtual_mod_str_raw_ptr) | |
| 213 continue; | |
| 214 const std::string virtual_mod_str = virtual_mod_str_raw_ptr; | |
| 215 XFree(virtual_mod_str_raw_ptr); | |
| 216 | |
| 217 if (string_to_find == virtual_mod_str) { | |
| 218 if (!XkbVirtualModsToReal(xkb_desc, virtual_mod_mask, &real_mask)) { | |
| 219 DVLOG(1) << "XkbVirtualModsToReal failed"; | |
| 220 real_mask = kBadMask; // reset the return value, just in case. | |
| 221 } | |
| 222 break; | |
| 223 } | |
| 224 } | |
| 225 } | |
| 226 XkbFreeKeyboard(xkb_desc, 0, True /* free all components */); | |
| 227 return real_mask; | |
| 228 } | |
| 229 | |
| 230 void XKeyboardImpl::SetLockedModifiers(bool caps_lock_enabled) { | |
| 231 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 232 | |
| 233 // Always turn off num lock. | |
| 234 unsigned int affect_mask = num_lock_mask_; | |
| 235 unsigned int value_mask = 0; | |
| 236 | |
| 237 affect_mask |= LockMask; | |
| 238 value_mask |= (caps_lock_enabled ? LockMask : 0); | |
| 239 current_caps_lock_status_ = caps_lock_enabled; | |
| 240 | |
| 241 XkbLockModifiers(GetXDisplay(), XkbUseCoreKbd, affect_mask, value_mask); | |
| 242 } | |
| 243 | |
| 244 bool XKeyboardImpl::SetLayoutInternal(const std::string& layout_name, | |
| 245 bool force) { | |
| 246 if (!is_running_on_chrome_os_) { | |
| 247 // We should not try to change a layout on Linux or inside ui_tests. Just | |
| 248 // return true. | |
| 249 return true; | |
| 250 } | |
| 251 | |
| 252 if (!CheckLayoutName(layout_name)) | |
| 253 return false; | |
| 254 | |
| 255 if (!force && (current_layout_name_ == layout_name)) { | |
| 256 DVLOG(1) << "The requested layout is already set: " << layout_name; | |
| 257 return true; | |
| 258 } | |
| 259 | |
| 260 DVLOG(1) << (force ? "Reapply" : "Set") << " layout: " << layout_name; | |
| 261 | |
| 262 const bool start_execution = execute_queue_.empty(); | |
| 263 // If no setxkbmap command is in flight (i.e. start_execution is true), | |
| 264 // start the first one by explicitly calling MaybeExecuteSetLayoutCommand(). | |
| 265 // If one or more setxkbmap commands are already in flight, just push the | |
| 266 // layout name to the queue. setxkbmap command for the layout will be called | |
| 267 // via OnSetLayoutFinish() callback later. | |
| 268 execute_queue_.push(layout_name); | |
| 269 if (start_execution) | |
| 270 MaybeExecuteSetLayoutCommand(); | |
| 271 | |
| 272 return true; | |
| 273 } | |
| 274 | |
| 275 // Executes 'setxkbmap -layout ...' command asynchronously using a layout name | |
| 276 // in the |execute_queue_|. Do nothing if the queue is empty. | |
| 277 // TODO(yusukes): Use libxkbfile.so instead of the command (crosbug.com/13105) | |
| 278 void XKeyboardImpl::MaybeExecuteSetLayoutCommand() { | |
| 279 if (execute_queue_.empty()) | |
| 280 return; | |
| 281 const std::string layout_to_set = execute_queue_.front(); | |
| 282 | |
| 283 std::vector<std::string> argv; | |
| 284 base::ProcessHandle handle = base::kNullProcessHandle; | |
| 285 | |
| 286 argv.push_back(kSetxkbmapCommand); | |
| 287 argv.push_back("-layout"); | |
| 288 argv.push_back(layout_to_set); | |
| 289 argv.push_back("-synch"); | |
| 290 | |
| 291 if (!base::LaunchProcess(argv, base::LaunchOptions(), &handle)) { | |
| 292 DVLOG(1) << "Failed to execute setxkbmap: " << layout_to_set; | |
| 293 execute_queue_ = std::queue<std::string>(); // clear the queue. | |
| 294 return; | |
| 295 } | |
| 296 | |
| 297 PollUntilChildFinish(handle); | |
| 298 | |
| 299 DVLOG(1) << "ExecuteSetLayoutCommand: " | |
| 300 << layout_to_set << ": pid=" << base::GetProcId(handle); | |
| 301 } | |
| 302 | |
| 303 // Delay and loop until child process finishes and call the callback. | |
| 304 void XKeyboardImpl::PollUntilChildFinish(const base::ProcessHandle handle) { | |
| 305 int exit_code; | |
| 306 DVLOG(1) << "PollUntilChildFinish: poll for pid=" << base::GetProcId(handle); | |
| 307 switch (base::GetTerminationStatus(handle, &exit_code)) { | |
| 308 case base::TERMINATION_STATUS_STILL_RUNNING: | |
| 309 DVLOG(1) << "PollUntilChildFinish: Try waiting again"; | |
| 310 base::MessageLoop::current()->PostDelayedTask( | |
| 311 FROM_HERE, | |
| 312 base::Bind(&XKeyboardImpl::PollUntilChildFinish, | |
| 313 weak_factory_.GetWeakPtr(), handle), | |
| 314 base::TimeDelta::FromMilliseconds(kSetLayoutCommandCheckDelayMs)); | |
| 315 return; | |
| 316 | |
| 317 case base::TERMINATION_STATUS_NORMAL_TERMINATION: | |
| 318 DVLOG(1) << "PollUntilChildFinish: Child process finished"; | |
| 319 OnSetLayoutFinish(); | |
| 320 return; | |
| 321 | |
| 322 case base::TERMINATION_STATUS_ABNORMAL_TERMINATION: | |
| 323 DVLOG(1) << "PollUntilChildFinish: Abnormal exit code: " << exit_code; | |
| 324 OnSetLayoutFinish(); | |
| 325 return; | |
| 326 | |
| 327 default: | |
| 328 NOTIMPLEMENTED(); | |
| 329 OnSetLayoutFinish(); | |
| 330 return; | |
| 331 } | |
| 332 } | |
| 333 | |
| 334 bool XKeyboardImpl::CapsLockIsEnabled() { | |
| 335 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 336 XkbStateRec status; | |
| 337 XkbGetState(GetXDisplay(), XkbUseCoreKbd, &status); | |
| 338 return (status.locked_mods & LockMask); | |
| 339 } | |
| 340 | |
| 341 bool XKeyboardImpl::IsISOLevel5ShiftAvailable() const { | |
| 342 for (size_t i = 0; i < arraysize(kISOLevel5ShiftLayoutIds); ++i) { | |
| 343 if (current_layout_name_ == kISOLevel5ShiftLayoutIds[i]) | |
| 344 return true; | |
| 345 } | |
| 346 return false; | |
| 347 } | |
| 348 | |
| 349 bool XKeyboardImpl::IsAltGrAvailable() const { | |
| 350 for (size_t i = 0; i < arraysize(kAltGrLayoutIds); ++i) { | |
| 351 if (current_layout_name_ == kAltGrLayoutIds[i]) | |
| 352 return true; | |
| 353 } | |
| 354 return false; | |
| 355 } | |
| 356 | |
| 357 | |
| 358 bool XKeyboardImpl::SetAutoRepeatEnabled(bool enabled) { | |
| 359 if (enabled) | |
| 360 XAutoRepeatOn(GetXDisplay()); | |
| 361 else | |
| 362 XAutoRepeatOff(GetXDisplay()); | |
| 363 DVLOG(1) << "Set auto-repeat mode to: " << (enabled ? "on" : "off"); | |
| 364 return true; | |
| 365 } | |
| 366 | |
| 367 bool XKeyboardImpl::SetAutoRepeatRate(const AutoRepeatRate& rate) { | |
| 368 DVLOG(1) << "Set auto-repeat rate to: " | |
| 369 << rate.initial_delay_in_ms << " ms delay, " | |
| 370 << rate.repeat_interval_in_ms << " ms interval"; | |
| 371 if (XkbSetAutoRepeatRate(GetXDisplay(), XkbUseCoreKbd, | |
| 372 rate.initial_delay_in_ms, | |
| 373 rate.repeat_interval_in_ms) != True) { | |
| 374 DVLOG(1) << "Failed to set auto-repeat rate"; | |
| 375 return false; | |
| 376 } | |
| 377 return true; | |
| 378 } | |
| 379 | |
| 380 void XKeyboardImpl::SetCapsLockEnabled(bool enable_caps_lock) { | |
| 381 SetLockedModifiers(enable_caps_lock); | |
| 382 } | |
| 383 | |
| 384 bool XKeyboardImpl::SetCurrentKeyboardLayoutByName( | |
| 385 const std::string& layout_name) { | |
| 386 if (SetLayoutInternal(layout_name, false)) { | |
| 387 current_layout_name_ = layout_name; | |
| 388 return true; | |
| 389 } | |
| 390 return false; | |
| 391 } | |
| 392 | |
| 393 bool XKeyboardImpl::ReapplyCurrentKeyboardLayout() { | |
| 394 if (current_layout_name_.empty()) { | |
| 395 DVLOG(1) << "Can't reapply XKB layout: layout unknown"; | |
| 396 return false; | |
| 397 } | |
| 398 return SetLayoutInternal(current_layout_name_, true /* force */); | |
| 399 } | |
| 400 | |
| 401 void XKeyboardImpl::ReapplyCurrentModifierLockStatus() { | |
| 402 SetLockedModifiers(current_caps_lock_status_); | |
| 403 } | |
| 404 | |
| 405 void XKeyboardImpl::DisableNumLock() { | |
| 406 SetCapsLockEnabled(current_caps_lock_status_); | |
| 407 } | |
| 408 | |
| 409 void XKeyboardImpl::OnSetLayoutFinish() { | |
| 410 if (execute_queue_.empty()) { | |
| 411 DVLOG(1) << "OnSetLayoutFinish: execute_queue_ is empty. " | |
| 412 << "base::LaunchProcess failed?"; | |
| 413 return; | |
| 414 } | |
| 415 execute_queue_.pop(); | |
| 416 MaybeExecuteSetLayoutCommand(); | |
| 417 } | |
| 418 | |
| 419 } // namespace | |
| 420 | |
| 421 // static | |
| 422 bool XKeyboard::GetAutoRepeatEnabledForTesting() { | |
| 423 XKeyboardState state = {}; | |
| 424 XGetKeyboardControl(GetXDisplay(), &state); | |
| 425 return state.global_auto_repeat != AutoRepeatModeOff; | |
| 426 } | |
| 427 | |
| 428 // static | |
| 429 bool XKeyboard::GetAutoRepeatRateForTesting(AutoRepeatRate* out_rate) { | |
| 430 return XkbGetAutoRepeatRate(GetXDisplay(), XkbUseCoreKbd, | |
| 431 &(out_rate->initial_delay_in_ms), | |
| 432 &(out_rate->repeat_interval_in_ms)) == True; | |
| 433 } | |
| 434 | |
| 435 // static | |
| 436 bool XKeyboard::CheckLayoutNameForTesting(const std::string& layout_name) { | |
| 437 return CheckLayoutName(layout_name); | |
| 438 } | |
| 439 | |
| 440 // static | |
| 441 XKeyboard* XKeyboard::Create() { | |
| 442 return new XKeyboardImpl(); | |
| 443 } | |
| 444 | |
| 445 } // namespace input_method | |
| 446 } // namespace chromeos | |
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Chromium Code Reviews
Issue 232333002:
ozone: Rename XKeyboard to KeyboardController & use fake under ozone (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src