| // Copyright 2013 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 "chromeos/ime/xkeyboard.h" |
| |
| #include <cstdlib> |
| #include <cstring> |
| #include <queue> |
| #include <set> |
| #include <utility> |
| |
| #include "base/logging.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/message_loop/message_loop.h" |
| #include "base/process/launch.h" |
| #include "base/process/process_handle.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/sys_info.h" |
| #include "base/threading/thread_checker.h" |
| |
| // These includes conflict with base/tracked_objects.h so must come last. |
| #include <X11/XKBlib.h> |
| #include <X11/Xlib.h> |
| #include <glib.h> |
| |
| namespace chromeos { |
| namespace input_method { |
| namespace { |
| |
| Display* GetXDisplay() { |
| return base::MessagePumpForUI::GetDefaultXDisplay(); |
| } |
| |
| // 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; |
| } |
| |
| class XKeyboardImpl : public XKeyboard { |
| public: |
| XKeyboardImpl(); |
| virtual ~XKeyboardImpl() {} |
| |
| // Overridden from XKeyboard: |
| virtual bool SetCurrentKeyboardLayoutByName( |
| const std::string& layout_name) OVERRIDE; |
| virtual bool ReapplyCurrentKeyboardLayout() OVERRIDE; |
| virtual void ReapplyCurrentModifierLockStatus() OVERRIDE; |
| virtual void SetLockedModifiers( |
| ModifierLockStatus new_caps_lock_status, |
| ModifierLockStatus new_num_lock_status) OVERRIDE; |
| virtual void SetNumLockEnabled(bool enable_num_lock) OVERRIDE; |
| virtual void SetCapsLockEnabled(bool enable_caps_lock) OVERRIDE; |
| virtual bool NumLockIsEnabled() OVERRIDE; |
| virtual bool CapsLockIsEnabled() OVERRIDE; |
| virtual unsigned int GetNumLockMask() OVERRIDE; |
| virtual void GetLockedModifiers(bool* out_caps_lock_enabled, |
| bool* out_num_lock_enabled) OVERRIDE; |
| |
| private: |
| // This function is used by SetLayout() and RemapModifierKeys(). Calls |
| // setxkbmap command if needed, and updates the last_full_layout_name_ cache. |
| bool SetLayoutInternal(const std::string& layout_name, bool force); |
| |
| // 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 MaybeExecuteSetLayoutCommand(); |
| |
| // Called when execve'd setxkbmap process exits. |
| static void OnSetLayoutFinish(pid_t pid, int status, XKeyboardImpl* self); |
| |
| const bool is_running_on_chrome_os_; |
| unsigned int num_lock_mask_; |
| |
| // The current Num Lock and Caps Lock status. If true, enabled. |
| bool current_num_lock_status_; |
| bool current_caps_lock_status_; |
| // The XKB layout name which we set last time like "us" and "us(dvorak)". |
| std::string current_layout_name_; |
| |
| // A queue for executing setxkbmap one by one. |
| std::queue<std::string> execute_queue_; |
| |
| base::ThreadChecker thread_checker_; |
| |
| DISALLOW_COPY_AND_ASSIGN(XKeyboardImpl); |
| }; |
| |
| XKeyboardImpl::XKeyboardImpl() |
| : is_running_on_chrome_os_(base::SysInfo::IsRunningOnChromeOS()) { |
| num_lock_mask_ = GetNumLockMask(); |
| |
| // web_input_event_aurax11.cc 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. |
| CHECK(!is_running_on_chrome_os_ || (num_lock_mask_ == Mod2Mask)); |
| GetLockedModifiers(¤t_caps_lock_status_, ¤t_num_lock_status_); |
| } |
| |
| bool XKeyboardImpl::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 && (current_layout_name_ == 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 XKeyboardImpl::MaybeExecuteSetLayoutCommand() { |
| if (execute_queue_.empty()) |
| return; |
| const std::string layout_to_set = execute_queue_.front(); |
| |
| std::vector<std::string> argv; |
| base::ProcessHandle handle = base::kNullProcessHandle; |
| |
| argv.push_back(kSetxkbmapCommand); |
| argv.push_back("-layout"); |
| argv.push_back(layout_to_set); |
| argv.push_back("-synch"); |
| |
| if (!base::LaunchProcess(argv, base::LaunchOptions(), &handle)) { |
| DVLOG(1) << "Failed to execute setxkbmap: " << layout_to_set; |
| execute_queue_ = std::queue<std::string>(); // clear the queue. |
| return; |
| } |
| |
| // g_child_watch_add is necessary to prevent the process from becoming a |
| // zombie. |
| const base::ProcessId pid = base::GetProcId(handle); |
| g_child_watch_add(pid, |
| reinterpret_cast<GChildWatchFunc>(OnSetLayoutFinish), |
| this); |
| DVLOG(1) << "ExecuteSetLayoutCommand: " << layout_to_set << ": pid=" << pid; |
| } |
| |
| bool XKeyboardImpl::NumLockIsEnabled() { |
| bool num_lock_enabled = false; |
| GetLockedModifiers(NULL /* Caps Lock */, &num_lock_enabled); |
| return num_lock_enabled; |
| } |
| |
| bool XKeyboardImpl::CapsLockIsEnabled() { |
| bool caps_lock_enabled = false; |
| GetLockedModifiers(&caps_lock_enabled, NULL /* Num Lock */); |
| return caps_lock_enabled; |
| } |
| |
| unsigned int XKeyboardImpl::GetNumLockMask() { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| static const unsigned int kBadMask = 0; |
| |
| unsigned int real_mask = kBadMask; |
| XkbDescPtr xkb_desc = |
| XkbGetKeyboard(GetXDisplay(), XkbAllComponentsMask, XkbUseCoreKbd); |
| if (!xkb_desc) |
| return kBadMask; |
| |
| if (xkb_desc->dpy && xkb_desc->names && xkb_desc->names->vmods) { |
| const std::string string_to_find(kNumLockVirtualModifierString); |
| for (size_t i = 0; i < XkbNumVirtualMods; ++i) { |
| const unsigned int virtual_mod_mask = 1U << i; |
| 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; |
| XFree(virtual_mod_str_raw_ptr); |
| |
| 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 XKeyboardImpl::GetLockedModifiers(bool* out_caps_lock_enabled, |
| bool* out_num_lock_enabled) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| |
| if (out_num_lock_enabled && !num_lock_mask_) { |
| DVLOG(1) << "Cannot get locked modifiers. Num Lock mask unknown."; |
| if (out_caps_lock_enabled) |
| *out_caps_lock_enabled = false; |
| if (out_num_lock_enabled) |
| *out_num_lock_enabled = false; |
| return; |
| } |
| |
| XkbStateRec status; |
| XkbGetState(GetXDisplay(), XkbUseCoreKbd, &status); |
| if (out_caps_lock_enabled) |
| *out_caps_lock_enabled = status.locked_mods & LockMask; |
| if (out_num_lock_enabled) |
| *out_num_lock_enabled = status.locked_mods & num_lock_mask_; |
| } |
| |
| void XKeyboardImpl::SetLockedModifiers(ModifierLockStatus new_caps_lock_status, |
| ModifierLockStatus new_num_lock_status) { |
| DCHECK(thread_checker_.CalledOnValidThread()); |
| if (!num_lock_mask_) { |
| DVLOG(1) << "Cannot set locked modifiers. Num Lock mask unknown."; |
| return; |
| } |
| |
| unsigned int affect_mask = 0; |
| unsigned int value_mask = 0; |
| if (new_caps_lock_status != kDontChange) { |
| affect_mask |= LockMask; |
| value_mask |= ((new_caps_lock_status == kEnableLock) ? LockMask : 0); |
| current_caps_lock_status_ = (new_caps_lock_status == kEnableLock); |
| } |
| if (new_num_lock_status != kDontChange) { |
| affect_mask |= num_lock_mask_; |
| value_mask |= ((new_num_lock_status == kEnableLock) ? num_lock_mask_ : 0); |
| current_num_lock_status_ = (new_num_lock_status == kEnableLock); |
| } |
| |
| if (affect_mask) |
| XkbLockModifiers(GetXDisplay(), XkbUseCoreKbd, affect_mask, value_mask); |
| } |
| |
| void XKeyboardImpl::SetNumLockEnabled(bool enable_num_lock) { |
| SetLockedModifiers( |
| kDontChange, enable_num_lock ? kEnableLock : kDisableLock); |
| } |
| |
| void XKeyboardImpl::SetCapsLockEnabled(bool enable_caps_lock) { |
| SetLockedModifiers( |
| enable_caps_lock ? kEnableLock : kDisableLock, kDontChange); |
| } |
| |
| bool XKeyboardImpl::SetCurrentKeyboardLayoutByName( |
| const std::string& layout_name) { |
| if (SetLayoutInternal(layout_name, false)) { |
| current_layout_name_ = layout_name; |
| return true; |
| } |
| return false; |
| } |
| |
| bool XKeyboardImpl::ReapplyCurrentKeyboardLayout() { |
| if (current_layout_name_.empty()) { |
| DVLOG(1) << "Can't reapply XKB layout: layout unknown"; |
| return false; |
| } |
| return SetLayoutInternal(current_layout_name_, true /* force */); |
| } |
| |
| void XKeyboardImpl::ReapplyCurrentModifierLockStatus() { |
| SetLockedModifiers(current_caps_lock_status_ ? kEnableLock : kDisableLock, |
| current_num_lock_status_ ? kEnableLock : kDisableLock); |
| } |
| |
| // static |
| void XKeyboardImpl::OnSetLayoutFinish(pid_t pid, |
| int status, |
| XKeyboardImpl* self) { |
| DVLOG(1) << "OnSetLayoutFinish: pid=" << pid; |
| if (self->execute_queue_.empty()) { |
| DVLOG(1) << "OnSetLayoutFinish: execute_queue_ is empty. " |
| << "base::LaunchProcess failed? pid=" << pid; |
| return; |
| } |
| self->execute_queue_.pop(); |
| self->MaybeExecuteSetLayoutCommand(); |
| } |
| |
| } // namespace |
| |
| // static |
| bool XKeyboard::SetAutoRepeatEnabled(bool enabled) { |
| if (enabled) |
| XAutoRepeatOn(GetXDisplay()); |
| else |
| XAutoRepeatOff(GetXDisplay()); |
| DVLOG(1) << "Set auto-repeat mode to: " << (enabled ? "on" : "off"); |
| return true; |
| } |
| |
| // static |
| bool XKeyboard::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(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; |
| } |
| |
| // static |
| bool XKeyboard::GetAutoRepeatEnabledForTesting() { |
| XKeyboardState state = {}; |
| XGetKeyboardControl(GetXDisplay(), &state); |
| return state.global_auto_repeat != AutoRepeatModeOff; |
| } |
| |
| // static |
| bool XKeyboard::GetAutoRepeatRateForTesting(AutoRepeatRate* out_rate) { |
| return XkbGetAutoRepeatRate(GetXDisplay(), XkbUseCoreKbd, |
| &(out_rate->initial_delay_in_ms), |
| &(out_rate->repeat_interval_in_ms)) == True; |
| } |
| |
| // static |
| bool XKeyboard::CheckLayoutNameForTesting(const std::string& layout_name) { |
| return CheckLayoutName(layout_name); |
| } |
| |
| // static |
| XKeyboard* XKeyboard::Create() { |
| return new XKeyboardImpl(); |
| } |
| |
| } // namespace input_method |
| } // namespace chromeos |