| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ui/base/ime/chromeos/ime_keyboard_x11.h" |
| |
| #include <stddef.h> |
| #include <X11/XKBlib.h> |
| #include <X11/Xlib.h> |
| |
| #include "base/location.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "ui/gfx/x/x11_types.h" |
| |
| namespace chromeos { |
| namespace input_method { |
| namespace { |
| |
| // The delay in milliseconds that we'll wait between checking if |
| // setxkbmap command finished. |
| const int kSetLayoutCommandCheckDelayMs = 100; |
| |
| // The command we use to set the current XKB layout and modifier key mapping. |
| // TODO(yusukes): Use libxkbfile.so instead of the command (crosbug.com/13105) |
| const char kSetxkbmapCommand[] = "/usr/bin/setxkbmap"; |
| |
| // A string for obtaining a mask value for Num Lock. |
| const char kNumLockVirtualModifierString[] = "NumLock"; |
| |
| // Returns false if |layout_name| contains a bad character. |
| bool CheckLayoutName(const std::string& layout_name) { |
| static const char kValidLayoutNameCharacters[] = |
| "abcdefghijklmnopqrstuvwxyz0123456789()-_"; |
| |
| if (layout_name.empty()) { |
| DVLOG(1) << "Invalid layout_name: " << layout_name; |
| return false; |
| } |
| |
| if (layout_name.find_first_not_of(kValidLayoutNameCharacters) != |
| std::string::npos) { |
| DVLOG(1) << "Invalid layout_name: " << layout_name; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| } // namespace |
| |
| ImeKeyboardX11::ImeKeyboardX11() |
| : is_running_on_chrome_os_(base::SysInfo::IsRunningOnChromeOS()), |
| weak_factory_(this) { |
| // X must be already initialized. |
| CHECK(gfx::GetXDisplay()); |
| |
| num_lock_mask_ = GetNumLockMask(); |
| |
| if (is_running_on_chrome_os_) { |
| // Some code seems to assume that Mod2Mask is always assigned to |
| // Num Lock. |
| // |
| // TODO(yusukes): Check the assumption is really okay. If not, |
| // modify the Aura code, and then remove the CHECK below. |
| LOG_IF(ERROR, num_lock_mask_ != Mod2Mask) |
| << "NumLock is not assigned to Mod2Mask. : " << num_lock_mask_; |
| } |
| |
| caps_lock_is_enabled_ = CapsLockIsEnabled(); |
| // Disable Num Lock on X start up for http://crosbug.com/29169. |
| DisableNumLock(); |
| } |
| |
| ImeKeyboardX11::~ImeKeyboardX11() {} |
| |
| unsigned int ImeKeyboardX11::GetNumLockMask() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| static const unsigned int kBadMask = 0; |
| |
| unsigned int real_mask = kBadMask; |
| XkbDescPtr xkb_desc = |
| XkbGetKeyboard(gfx::GetXDisplay(), XkbAllComponentsMask, XkbUseCoreKbd); |
| if (!xkb_desc) |
| return kBadMask; |
| |
| if (xkb_desc->dpy && xkb_desc->names) { |
| const std::string string_to_find(kNumLockVirtualModifierString); |
| for (size_t i = 0; i < XkbNumVirtualMods; ++i) { |
| const unsigned int virtual_mod_mask = 1U << i; |
| gfx::XScopedPtr<char> virtual_mod_str_raw_ptr( |
| XGetAtomName(xkb_desc->dpy, xkb_desc->names->vmods[i])); |
| if (!virtual_mod_str_raw_ptr) |
| continue; |
| const std::string virtual_mod_str = virtual_mod_str_raw_ptr.get(); |
| |
| if (string_to_find == virtual_mod_str) { |
| if (!XkbVirtualModsToReal(xkb_desc, virtual_mod_mask, &real_mask)) { |
| DVLOG(1) << "XkbVirtualModsToReal failed"; |
| real_mask = kBadMask; // reset the return value, just in case. |
| } |
| break; |
| } |
| } |
| } |
| XkbFreeKeyboard(xkb_desc, 0, True /* free all components */); |
| return real_mask; |
| } |
| |
| void ImeKeyboardX11::SetLockedModifiers() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| // Always turn off num lock. |
| unsigned int affect_mask = num_lock_mask_; |
| unsigned int value_mask = 0; |
| |
| affect_mask |= LockMask; |
| value_mask |= (caps_lock_is_enabled_ ? LockMask : 0); |
| |
| XkbLockModifiers(gfx::GetXDisplay(), XkbUseCoreKbd, affect_mask, value_mask); |
| } |
| |
| bool ImeKeyboardX11::SetLayoutInternal(const std::string& layout_name, |
| bool force) { |
| if (!is_running_on_chrome_os_) { |
| // We should not try to change a layout on Linux or inside ui_tests. Just |
| // return true. |
| return true; |
| } |
| |
| if (!CheckLayoutName(layout_name)) |
| return false; |
| |
| if (!force && (last_layout_ == layout_name)) { |
| DVLOG(1) << "The requested layout is already set: " << layout_name; |
| return true; |
| } |
| |
| DVLOG(1) << (force ? "Reapply" : "Set") << " layout: " << layout_name; |
| |
| const bool start_execution = execute_queue_.empty(); |
| // If no setxkbmap command is in flight (i.e. start_execution is true), |
| // start the first one by explicitly calling MaybeExecuteSetLayoutCommand(). |
| // If one or more setxkbmap commands are already in flight, just push the |
| // layout name to the queue. setxkbmap command for the layout will be called |
| // via OnSetLayoutFinish() callback later. |
| execute_queue_.push(layout_name); |
| if (start_execution) |
| MaybeExecuteSetLayoutCommand(); |
| |
| return true; |
| } |
| |
| // Executes 'setxkbmap -layout ...' command asynchronously using a layout name |
| // in the |execute_queue_|. Do nothing if the queue is empty. |
| // TODO(yusukes): Use libxkbfile.so instead of the command (crosbug.com/13105) |
| void ImeKeyboardX11::MaybeExecuteSetLayoutCommand() { |
| if (execute_queue_.empty()) |
| return; |
| const std::string layout_to_set = execute_queue_.front(); |
| |
| std::vector<std::string> argv; |
| |
| argv.push_back(kSetxkbmapCommand); |
| argv.push_back("-layout"); |
| argv.push_back(layout_to_set); |
| argv.push_back("-synch"); |
| |
| base::Process process = base::LaunchProcess(argv, base::LaunchOptions()); |
| if (!process.IsValid()) { |
| DVLOG(1) << "Failed to execute setxkbmap: " << layout_to_set; |
| execute_queue_ = std::queue<std::string>(); // clear the queue. |
| return; |
| } |
| |
| PollUntilChildFinish(process.Handle()); |
| |
| DVLOG(1) << "ExecuteSetLayoutCommand: " << layout_to_set |
| << ": pid=" << process.Pid(); |
| } |
| |
| // Delay and loop until child process finishes and call the callback. |
| void ImeKeyboardX11::PollUntilChildFinish(const base::ProcessHandle handle) { |
| int exit_code; |
| DVLOG(1) << "PollUntilChildFinish: poll for pid=" << base::GetProcId(handle); |
| switch (base::GetTerminationStatus(handle, &exit_code)) { |
| case base::TERMINATION_STATUS_STILL_RUNNING: |
| DVLOG(1) << "PollUntilChildFinish: Try waiting again"; |
| base::ThreadTaskRunnerHandle::Get()->PostDelayedTask( |
| FROM_HERE, base::Bind(&ImeKeyboardX11::PollUntilChildFinish, |
| weak_factory_.GetWeakPtr(), handle), |
| base::TimeDelta::FromMilliseconds(kSetLayoutCommandCheckDelayMs)); |
| return; |
| |
| case base::TERMINATION_STATUS_NORMAL_TERMINATION: |
| DVLOG(1) << "PollUntilChildFinish: Child process finished"; |
| OnSetLayoutFinish(); |
| return; |
| |
| case base::TERMINATION_STATUS_ABNORMAL_TERMINATION: |
| DVLOG(1) << "PollUntilChildFinish: Abnormal exit code: " << exit_code; |
| OnSetLayoutFinish(); |
| return; |
| |
| default: |
| NOTIMPLEMENTED(); |
| OnSetLayoutFinish(); |
| return; |
| } |
| } |
| |
| bool ImeKeyboardX11::CapsLockIsEnabled() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| XkbStateRec status; |
| XkbGetState(gfx::GetXDisplay(), XkbUseCoreKbd, &status); |
| return (status.locked_mods & LockMask); |
| } |
| |
| bool ImeKeyboardX11::SetAutoRepeatEnabled(bool enabled) { |
| if (enabled) |
| XAutoRepeatOn(gfx::GetXDisplay()); |
| else |
| XAutoRepeatOff(gfx::GetXDisplay()); |
| DVLOG(1) << "Set auto-repeat mode to: " << (enabled ? "on" : "off"); |
| return true; |
| } |
| |
| bool ImeKeyboardX11::GetAutoRepeatEnabled() { |
| XKeyboardState state = {}; |
| XGetKeyboardControl(gfx::GetXDisplay(), &state); |
| return state.global_auto_repeat != AutoRepeatModeOff; |
| } |
| |
| bool ImeKeyboardX11::SetAutoRepeatRate(const AutoRepeatRate& rate) { |
| DVLOG(1) << "Set auto-repeat rate to: " |
| << rate.initial_delay_in_ms << " ms delay, " |
| << rate.repeat_interval_in_ms << " ms interval"; |
| if (XkbSetAutoRepeatRate(gfx::GetXDisplay(), XkbUseCoreKbd, |
| rate.initial_delay_in_ms, |
| rate.repeat_interval_in_ms) != True) { |
| DVLOG(1) << "Failed to set auto-repeat rate"; |
| return false; |
| } |
| return true; |
| } |
| |
| void ImeKeyboardX11::SetCapsLockEnabled(bool enable_caps_lock) { |
| ImeKeyboard::SetCapsLockEnabled(enable_caps_lock); |
| SetLockedModifiers(); |
| } |
| |
| bool ImeKeyboardX11::SetCurrentKeyboardLayoutByName( |
| const std::string& layout_name) { |
| if (SetLayoutInternal(layout_name, false)) { |
| last_layout_ = layout_name; |
| return true; |
| } |
| return false; |
| } |
| |
| bool ImeKeyboardX11::ReapplyCurrentKeyboardLayout() { |
| if (last_layout_.empty()) { |
| DVLOG(1) << "Can't reapply XKB layout: layout unknown"; |
| return false; |
| } |
| return SetLayoutInternal(last_layout_, true /* force */); |
| } |
| |
| void ImeKeyboardX11::ReapplyCurrentModifierLockStatus() { |
| SetLockedModifiers(); |
| } |
| |
| void ImeKeyboardX11::DisableNumLock() { |
| SetCapsLockEnabled(caps_lock_is_enabled_); |
| } |
| |
| void ImeKeyboardX11::OnSetLayoutFinish() { |
| if (execute_queue_.empty()) { |
| DVLOG(1) << "OnSetLayoutFinish: execute_queue_ is empty. " |
| << "base::LaunchProcess failed?"; |
| return; |
| } |
| execute_queue_.pop(); |
| MaybeExecuteSetLayoutCommand(); |
| } |
| |
| // static |
| bool ImeKeyboard::GetAutoRepeatRateForTesting(AutoRepeatRate* out_rate) { |
| return XkbGetAutoRepeatRate(gfx::GetXDisplay(), |
| XkbUseCoreKbd, |
| &(out_rate->initial_delay_in_ms), |
| &(out_rate->repeat_interval_in_ms)) == True; |
| } |
| |
| // static |
| bool ImeKeyboard::CheckLayoutNameForTesting(const std::string& layout_name) { |
| return CheckLayoutName(layout_name); |
| } |
| |
| // static |
| ImeKeyboard* ImeKeyboard::Create() { |
| return new ImeKeyboardX11(); |
| } |
| |
| } // namespace input_method |
| } // namespace chromeos |