Developer Feature: Add Debug Accelerators to Toggle Touchscreen/Touchpad On or Off (CrOS)

chrome/browser/chromeos/system/input_device_settings_impl_x11.cc

 // 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 "chrome/browser/chromeos/system/input_device_settings.h"
 
 #include <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/files/file_path.h"
 #include "base/files/file_util.h"
 #include "base/memory/ref_counted.h"
 #include "base/message_loop/message_loop.h"
 #include "base/process/kill.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/task_runner.h"
 #include "base/threading/sequenced_worker_pool.h"
 #include "content/public/browser/browser_thread.h"
+#include "ui/events/devices/x11/device_data_manager_x11.h"
+#include "ui/events/devices/x11/device_list_cache_x11.h"
+#include "ui/gfx/x/x11_types.h"
 
 namespace chromeos {
 namespace system {
 
 namespace {
 
 InputDeviceSettings* g_instance = nullptr;
 InputDeviceSettings* g_test_instance = nullptr;
 
 const char kDeviceTypeTouchpad[] = "touchpad";
 const char kDeviceTypeMouse[] = "mouse";
 const char kInputControl[] = "/opt/google/input/inputcontrol";
 
+// The name of the xinput device corresponding to the internal touchpad.
+const char kInternalTouchpadName[] = "Elan Touchpad";
+
 typedef base::RefCountedData<bool> RefCountedBool;
 
 bool ScriptExists(const std::string& script) {
   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
   return base::PathExists(base::FilePath(script));
 }
 
 // Executes the input control script asynchronously, if it exists.
 void ExecuteScriptOnFileThread(const std::vector<std::string>& argv) {
   DCHECK(content::BrowserThread::GetBlockingPool()->RunsTasksOnCurrentThread());
@@ skipping 105 matching lines @@
   void SetTapToClick(bool enabled) override;
   void SetThreeFingerClick(bool enabled) override;
   void SetTapDragging(bool enabled) override;
   void SetNaturalScroll(bool enabled) override;
   void MouseExists(const DeviceExistsCallback& callback) override;
   void UpdateMouseSettings(const MouseSettings& settings) override;
   void SetMouseSensitivity(int value) override;
   void SetPrimaryButtonRight(bool right) override;
   void ReapplyTouchpadSettings() override;
   void ReapplyMouseSettings() override;
+  void SetInternalTouchpadEnabled(bool enabled) override;
 
   // Generate arguments for the inputcontrol script.
   //
   // |argv| is filled with arguments of script, that should be launched in order
   // to apply update.
   void GenerateTouchpadArguments(std::vector<std::string>* argv);
   void GenerateMouseArguments(std::vector<std::string>* argv);
 
   TouchpadSettings current_touchpad_settings_;
   MouseSettings current_mouse_settings_;
@@ skipping 81 matching lines @@
   current_touchpad_settings_ = TouchpadSettings();
   UpdateTouchpadSettings(settings);
 }
 
 void InputDeviceSettingsImplX11::ReapplyMouseSettings() {
   MouseSettings settings = current_mouse_settings_;
   current_mouse_settings_ = MouseSettings();
   UpdateMouseSettings(settings);
 }
 
+void InputDeviceSettingsImplX11::SetInternalTouchpadEnabled(bool enabled) {
+  ui::DeviceDataManagerX11* device_data_manager =
+      ui::DeviceDataManagerX11::GetInstance();
+  if (device_data_manager->IsXInput2Available()) {
+    const XIDeviceList& xi_dev_list =
+        ui::DeviceListCacheX11::GetInstance()->GetXI2DeviceList(
+            gfx::GetXDisplay());
+    for (int i = 0; i < xi_dev_list.count; ++i) {
+      std::string device_name(xi_dev_list[i].name);
+      base::TrimWhitespaceASCII(device_name, base::TRIM_TRAILING, &device_name);
+      if (device_name == kInternalTouchpadName) {
+        if (enabled)
+          device_data_manager->EnableDevice(xi_dev_list[i].deviceid);
+        else
+          device_data_manager->DisableDevice(xi_dev_list[i].deviceid);
+
+        return;
+      }
+    }
+  }
+}
+
 void InputDeviceSettingsImplX11::GenerateTouchpadArguments(
     std::vector<std::string>* argv) {
   argv->push_back(kInputControl);
   if (current_touchpad_settings_.IsSensitivitySet()) {
     AddSensitivityArguments(kDeviceTypeTouchpad,
                             current_touchpad_settings_.GetSensitivity(), argv);
   }
   if (current_touchpad_settings_.IsTapToClickSet()) {
     AddTPControlArguments("tapclick",
                           current_touchpad_settings_.GetTapToClick(), argv);
@@ skipping 41 matching lines @@
 void InputDeviceSettings::SetSettingsForTesting(
     InputDeviceSettings* test_settings) {
   if (g_test_instance == test_settings)
     return;
   delete g_test_instance;
   g_test_instance = test_settings;
 }
 
 }  // namespace system
 }  // namespace chromeos