chrome/browser/chromeos/system/input_device_settings_impl_x11.cc

   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 #include "chrome/browser/chromeos/system/input_device_settings.h"
   6
   7 #include <string>
   8 #include <vector>
   9
  10 #include "base/bind.h"
  11 #include "base/command_line.h"
  12 #include "base/files/file_path.h"
  13 #include "base/files/file_util.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/message_loop/message_loop.h"
  16 #include "base/process/kill.h"
  17 #include "base/process/launch.h"
  18 #include "base/process/process_handle.h"
  19 #include "base/strings/string_util.h"
  20 #include "base/strings/stringprintf.h"
  21 #include "base/sys_info.h"
  22 #include "base/task_runner.h"
  23 #include "base/threading/sequenced_worker_pool.h"
  24 #include "content/public/browser/browser_thread.h"
  25
  26 namespace chromeos {
  27 namespace system {
  28
  29 namespace {
  30
  31 InputDeviceSettings* g_instance = nullptr;
  32 InputDeviceSettings* g_test_instance = nullptr;
  33
  34 const char kDeviceTypeTouchpad[] = "touchpad";
  35 const char kDeviceTypeMouse[] = "mouse";
  36 const char kInputControl[] = "/opt/google/input/inputcontrol";
  37
  38 typedef base::RefCountedData<bool> RefCountedBool;
  39
  40 bool ScriptExists(const std::string& script) {
  41   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
  42   return base::PathExists(base::FilePath(script));
  43 }
  44
  45 // Executes the input control script asynchronously, if it exists.
  46 void ExecuteScriptOnFileThread(const std::vector<std::string>& argv) {
  47   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
  48   DCHECK(!argv.empty());
  49   const std::string& script(argv[0]);
  50
  51   // Script must exist on device and is of correct format.
  52   DCHECK(script.compare(kInputControl) == 0);
  53   DCHECK(!base::SysInfo::IsRunningOnChromeOS() || ScriptExists(script));
  54
  55   if (!ScriptExists(script))
  56     return;
  57
  58   base::Process process =
  59       base::LaunchProcess(base::CommandLine(argv), base::LaunchOptions());
  60   if (process.IsValid())
  61     base::EnsureProcessGetsReaped(process.pid());
  62 }
  63
  64 void ExecuteScript(const std::vector<std::string>& argv) {
  65   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  66
  67   if (argv.size() == 1)
  68     return;
  69
  70   VLOG(1) << "About to launch: \""
  71           << base::CommandLine(argv).GetCommandLineString() << "\"";
  72
  73   // Control scripts can take long enough to cause SIGART during shutdown
  74   // (http://crbug.com/261426). Run the blocking pool task with
  75   // CONTINUE_ON_SHUTDOWN so it won't be joined when Chrome shuts down.
  76   base::SequencedWorkerPool* pool = content::BrowserThread::GetBlockingPool();
  77   scoped_refptr<base::TaskRunner> runner =
  78       pool->GetTaskRunnerWithShutdownBehavior(
  79           base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
  80   runner->PostTask(FROM_HERE, base::Bind(&ExecuteScriptOnFileThread, argv));
  81 }
  82
  83 void AddSensitivityArguments(const char* device_type,
  84                              int value,
  85                              std::vector<std::string>* argv) {
  86   DCHECK(value >= kMinPointerSensitivity && value <= kMaxPointerSensitivity);
  87   argv->push_back(
  88       base::StringPrintf("--%s_sensitivity=%d", device_type, value));
  89 }
  90
  91 void AddTPControlArguments(const char* control,
  92                            bool enabled,
  93                            std::vector<std::string>* argv) {
  94   argv->push_back(base::StringPrintf("--%s=%d", control, enabled ? 1 : 0));
  95 }
  96
  97 void DeviceExistsBlockingPool(const char* device_type,
  98                               scoped_refptr<RefCountedBool> exists) {
  99   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
 100   exists->data = false;
 101   if (!ScriptExists(kInputControl))
 102     return;
 103
 104   std::vector<std::string> argv;
 105   argv.push_back(kInputControl);
 106   argv.push_back(base::StringPrintf("--type=%s", device_type));
 107   argv.push_back("--list");
 108   std::string output;
 109   // Output is empty if the device is not found.
 110   exists->data =
 111       base::GetAppOutput(base::CommandLine(argv), &output) && !output.empty();
 112   DVLOG(1) << "DeviceExistsBlockingPool:" << device_type << "=" << exists->data;
 113 }
 114
 115 void RunCallbackUIThread(
 116     scoped_refptr<RefCountedBool> exists,
 117     const InputDeviceSettings::DeviceExistsCallback& callback) {
 118   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 119   DVLOG(1) << "RunCallbackUIThread " << exists->data;
 120   callback.Run(exists->data);
 121 }
 122
 123 void DeviceExists(const char* script,
 124                   const InputDeviceSettings::DeviceExistsCallback& callback) {
 125   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 126
 127   // One or both of the control scripts can apparently hang during shutdown
 128   // (http://crbug.com/255546). Run the blocking pool task with
 129   // CONTINUE_ON_SHUTDOWN so it won't be joined when Chrome shuts down.
 130   scoped_refptr<RefCountedBool> exists(new RefCountedBool(false));
 131   base::SequencedWorkerPool* pool = content::BrowserThread::GetBlockingPool();
 132   scoped_refptr<base::TaskRunner> runner =
 133       pool->GetTaskRunnerWithShutdownBehavior(
 134           base::SequencedWorkerPool::CONTINUE_ON_SHUTDOWN);
 135   runner->PostTaskAndReply(
 136       FROM_HERE, base::Bind(&DeviceExistsBlockingPool, script, exists),
 137       base::Bind(&RunCallbackUIThread, exists, callback));
 138 }
 139
 140 // InputDeviceSettings for Linux with X11.
 141 class InputDeviceSettingsImplX11 : public InputDeviceSettings {
 142  public:
 143   InputDeviceSettingsImplX11();
 144
 145  protected:
 146   ~InputDeviceSettingsImplX11() override {}
 147
 148  private:
 149   // Overridden from InputDeviceSettings.
 150   void TouchpadExists(const DeviceExistsCallback& callback) override;
 151   void UpdateTouchpadSettings(const TouchpadSettings& settings) override;
 152   void SetTouchpadSensitivity(int value) override;
 153   void SetTapToClick(bool enabled) override;
 154   void SetThreeFingerClick(bool enabled) override;
 155   void SetTapDragging(bool enabled) override;
 156   void SetNaturalScroll(bool enabled) override;
 157   void MouseExists(const DeviceExistsCallback& callback) override;
 158   void UpdateMouseSettings(const MouseSettings& settings) override;
 159   void SetMouseSensitivity(int value) override;
 160   void SetPrimaryButtonRight(bool right) override;
 161   void ReapplyTouchpadSettings() override;
 162   void ReapplyMouseSettings() override;
 163
 164   // Generate arguments for the inputcontrol script.
 165   //
 166   // |argv| is filled with arguments of script, that should be launched in order
 167   // to apply update.
 168   void GenerateTouchpadArguments(std::vector<std::string>* argv);
 169   void GenerateMouseArguments(std::vector<std::string>* argv);
 170
 171   TouchpadSettings current_touchpad_settings_;
 172   MouseSettings current_mouse_settings_;
 173
 174   DISALLOW_COPY_AND_ASSIGN(InputDeviceSettingsImplX11);
 175 };
 176
 177 InputDeviceSettingsImplX11::InputDeviceSettingsImplX11() {
 178 }
 179
 180 void InputDeviceSettingsImplX11::TouchpadExists(
 181     const DeviceExistsCallback& callback) {
 182   DeviceExists(kDeviceTypeTouchpad, callback);
 183 }
 184
 185 void InputDeviceSettingsImplX11::UpdateTouchpadSettings(
 186     const TouchpadSettings& settings) {
 187   std::vector<std::string> argv;
 188   if (current_touchpad_settings_.Update(settings)) {
 189     GenerateTouchpadArguments(&argv);
 190     ExecuteScript(argv);
 191   }
 192 }
 193
 194 void InputDeviceSettingsImplX11::SetTouchpadSensitivity(int value) {
 195   TouchpadSettings settings;
 196   settings.SetSensitivity(value);
 197   UpdateTouchpadSettings(settings);
 198 }
 199
 200 void InputDeviceSettingsImplX11::SetNaturalScroll(bool enabled) {
 201   TouchpadSettings settings;
 202   settings.SetNaturalScroll(enabled);
 203   UpdateTouchpadSettings(settings);
 204 }
 205
 206 void InputDeviceSettingsImplX11::SetTapToClick(bool enabled) {
 207   TouchpadSettings settings;
 208   settings.SetTapToClick(enabled);
 209   UpdateTouchpadSettings(settings);
 210 }
 211
 212 void InputDeviceSettingsImplX11::SetThreeFingerClick(bool enabled) {
 213   // For Alex/ZGB.
 214   TouchpadSettings settings;
 215   settings.SetThreeFingerClick(enabled);
 216   UpdateTouchpadSettings(settings);
 217 }
 218
 219 void InputDeviceSettingsImplX11::SetTapDragging(bool enabled) {
 220   TouchpadSettings settings;
 221   settings.SetTapDragging(enabled);
 222   UpdateTouchpadSettings(settings);
 223 }
 224
 225 void InputDeviceSettingsImplX11::MouseExists(
 226     const DeviceExistsCallback& callback) {
 227   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 228   DeviceExists(kDeviceTypeMouse, callback);
 229 }
 230
 231 void InputDeviceSettingsImplX11::UpdateMouseSettings(
 232     const MouseSettings& update) {
 233   std::vector<std::string> argv;
 234   if (current_mouse_settings_.Update(update)) {
 235     GenerateMouseArguments(&argv);
 236     ExecuteScript(argv);
 237   }
 238 }
 239
 240 void InputDeviceSettingsImplX11::SetMouseSensitivity(int value) {
 241   MouseSettings settings;
 242   settings.SetSensitivity(value);
 243   UpdateMouseSettings(settings);
 244 }
 245
 246 void InputDeviceSettingsImplX11::SetPrimaryButtonRight(bool right) {
 247   MouseSettings settings;
 248   settings.SetPrimaryButtonRight(right);
 249   UpdateMouseSettings(settings);
 250 }
 251
 252 void InputDeviceSettingsImplX11::ReapplyTouchpadSettings() {
 253   TouchpadSettings settings = current_touchpad_settings_;
 254   current_touchpad_settings_ = TouchpadSettings();
 255   UpdateTouchpadSettings(settings);
 256 }
 257
 258 void InputDeviceSettingsImplX11::ReapplyMouseSettings() {
 259   MouseSettings settings = current_mouse_settings_;
 260   current_mouse_settings_ = MouseSettings();
 261   UpdateMouseSettings(settings);
 262 }
 263
 264 void InputDeviceSettingsImplX11::GenerateTouchpadArguments(
 265     std::vector<std::string>* argv) {
 266   argv->push_back(kInputControl);
 267   if (current_touchpad_settings_.IsSensitivitySet()) {
 268     AddSensitivityArguments(kDeviceTypeTouchpad,
 269                             current_touchpad_settings_.GetSensitivity(), argv);
 270   }
 271   if (current_touchpad_settings_.IsTapToClickSet()) {
 272     AddTPControlArguments("tapclick",
 273                           current_touchpad_settings_.GetTapToClick(), argv);
 274   }
 275   if (current_touchpad_settings_.IsThreeFingerClickSet()) {
 276     AddTPControlArguments("t5r2_three_finger_click",
 277                           current_touchpad_settings_.GetThreeFingerClick(),
 278                           argv);
 279   }
 280   if (current_touchpad_settings_.IsTapDraggingSet()) {
 281     AddTPControlArguments("tapdrag",
 282                           current_touchpad_settings_.GetTapDragging(), argv);
 283   }
 284   if (current_touchpad_settings_.IsNaturalScrollSet()) {
 285     AddTPControlArguments("australian_scrolling",
 286                           current_touchpad_settings_.GetNaturalScroll(), argv);
 287   }
 288 }
 289
 290 void InputDeviceSettingsImplX11::GenerateMouseArguments(
 291     std::vector<std::string>* argv) {
 292   argv->push_back(kInputControl);
 293   if (current_mouse_settings_.IsSensitivitySet()) {
 294     AddSensitivityArguments(kDeviceTypeMouse,
 295                             current_mouse_settings_.GetSensitivity(), argv);
 296   }
 297   if (current_mouse_settings_.IsPrimaryButtonRightSet()) {
 298     AddTPControlArguments(
 299         "mouse_swap_lr", current_mouse_settings_.GetPrimaryButtonRight(), argv);
 300   }
 301 }
 302
 303 }  // namespace
 304
 305 // static
 306 InputDeviceSettings* InputDeviceSettings::Get() {
 307   if (g_test_instance)
 308     return g_test_instance;
 309   if (!g_instance)
 310     g_instance = new InputDeviceSettingsImplX11;
 311   return g_instance;
 312 }
 313
 314 // static
 315 void InputDeviceSettings::SetSettingsForTesting(
 316     InputDeviceSettings* test_settings) {
 317   if (g_test_instance == test_settings)
 318     return;
 319   delete g_test_instance;
 320   g_test_instance = test_settings;
 321 }
 322
 323 }  // namespace system
 324 }  // namespace chromeos