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

chrome/browser/chromeos/system/input_device_settings_impl_x11.cc

Index: chrome/browser/chromeos/system/input_device_settings_impl_x11.cc
diff --git a/chrome/browser/chromeos/system/input_device_settings_impl_x11.cc b/chrome/browser/chromeos/system/input_device_settings_impl_x11.cc
index b9be3aa079b6ff5f639939abf60e45f03c6e3a4b..7eebec2f368bf9c084fab2a81596bfa969d70e9e 100644
--- a/chrome/browser/chromeos/system/input_device_settings_impl_x11.cc
+++ b/chrome/browser/chromeos/system/input_device_settings_impl_x11.cc
@@ -22,6 +22,9 @@
 #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 {
@@ -35,6 +38,9 @@ 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) {
@@ -160,6 +166,7 @@ class InputDeviceSettingsImplX11 : public InputDeviceSettings {
   void SetPrimaryButtonRight(bool right) override;
   void ReapplyTouchpadSettings() override;
   void ReapplyMouseSettings() override;
+  void SetInternalTouchpadEnabled(bool enabled) override;
 
   // Generate arguments for the inputcontrol script.
   //
@@ -261,6 +268,28 @@ void InputDeviceSettingsImplX11::ReapplyMouseSettings() {
   UpdateMouseSettings(settings);
 }
 
+void InputDeviceSettingsImplX11::SetInternalTouchpadEnabled(bool enabled) {
+  ui::DeviceDataManagerX11* device_data_manager =
+      ui::DeviceDataManagerX11::GetInstance();
+  if (device_data_manager->IsXInput2Available()) {

[sadrul, 2015/11/03 19:09:26]

early exit instead.

[afakhry, 2015/11/04 02:28:21]

Done.

+    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);