Support for mousecontrol script

chrome/browser/chromeos/system/input_device_settings.cc

Index: chrome/browser/chromeos/system/input_device_settings.cc
===================================================================
--- chrome/browser/chromeos/system/input_device_settings.cc	(revision 118341)
+++ chrome/browser/chromeos/system/input_device_settings.cc	(working copy)
@@ -4,6 +4,7 @@
 
 #include "chrome/browser/chromeos/system/input_device_settings.h"
 
+#include <stdarg.h>
 #include <string>
 #include <vector>
 
@@ -22,17 +23,24 @@
 namespace chromeos {
 namespace system {
 
-namespace touchpad_settings {
 namespace {
-const char* kTpControl = "/opt/google/touchpad/tpcontrol";
+const char kTpControl[] = "/opt/google/touchpad/tpcontrol";
+const char kMouseControl[] = "/opt/google/mouse/mousecontrol";
 
-bool TPCtrlExists() {
-  return file_util::PathExists(FilePath(kTpControl));
+bool ScriptExists(const std::string& script) {
+  return file_util::PathExists(FilePath(script));
 }
 
-// Launches the tpcontrol command asynchronously, if it exists.
-void LaunchTpControl(const std::vector<std::string>& argv) {
-  if (!TPCtrlExists())
+// Executes the input control script asynchronously, if it exists.
+void ExecuteScriptOnFileThread(const std::vector<std::string>& argv) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+  DCHECK(!argv.empty());
+  const std::string& script(argv[0]);
+
+  // Script must exist on device.
+  DCHECK(!runtime_environment::IsRunningOnChromeOS() || ScriptExists(script));
+
+  if (!ScriptExists(script))
     return;
 
   base::LaunchOptions options;
@@ -40,74 +48,79 @@
   base::LaunchProcess(CommandLine(argv), options, NULL);
 }
 
-}  // namespace
+void ExecuteScript(int argc, ...) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+  std::vector<std::string> argv;
+  va_list vl;
+  va_start(vl, argc);
+  for (int i = 0; i < argc; ++i) {
+    argv.push_back(va_arg(vl, const char*));
+  }
+  va_end(vl);
 
-bool TouchpadExists() {
-  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
-  static bool init = false;
-  static bool exists = false;
+  BrowserThread::PostTask(
+      BrowserThread::FILE, FROM_HERE,
+      base::Bind(&ExecuteScriptOnFileThread, argv));
+}
 
-  if (init)
-    return exists;
+void SetPointerSensitivity(const char* script, int value) {
+  DCHECK(value > 0 && value < 6);
+  ExecuteScript(3, script, "sensitivity", StringPrintf("%d", value).c_str());
+}
 
-  init = true;
-  if (!TPCtrlExists())
-    return exists;
+bool DeviceExists(const char* script) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+  if (!ScriptExists(script))
+    return false;
 
   std::vector<std::string> argv;
-  argv.push_back(kTpControl);
+  argv.push_back(script);
   argv.push_back("status");
   std::string output;
-  // On devices with no touchpad, output is empty.
-  exists = base::GetAppOutput(CommandLine(argv), &output) && !output.empty();
-  return exists;
+  // Output is empty if the device is not found.
+  return base::GetAppOutput(CommandLine(argv), &output) && !output.empty();
 }
 
-void SetSensitivity(int value) {
-  // Run this on the FILE thread.
-  if (!BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
-    BrowserThread::PostTask(
-        BrowserThread::FILE, FROM_HERE,
-        base::Bind(&SetSensitivity, value));
-    return;
-  }
+}  // namespace
 
-  std::vector<std::string> argv;
-  argv.push_back(kTpControl);
-  argv.push_back("sensitivity");
-  argv.push_back(StringPrintf("%d", value));
+namespace pointer_settings {
 
-  LaunchTpControl(argv);
+void SetSensitivity(int value) {
+  SetPointerSensitivity(kTpControl, value);
+  SetPointerSensitivity(kMouseControl, value);
 }
 
-void SetTapToClick(bool enabled) {
-  // Run this on the FILE thread.
-  if (!BrowserThread::CurrentlyOn(BrowserThread::FILE)) {
-    BrowserThread::PostTask(
-        BrowserThread::FILE, FROM_HERE,
-        base::Bind(&SetTapToClick, enabled));
-    return;
-  }
+}  // namespace pointer_settings
 
-  std::vector<std::string> argv;
-  argv.push_back(kTpControl);
-  argv.push_back("taptoclick");
-  argv.push_back(enabled ? "on" : "off");
+namespace touchpad_settings {
 
-  LaunchTpControl(argv);
+bool TouchpadExists() {
+  // We only need to do this check once, assuming no pluggable touchpad devices.
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
+  static bool init = false;
+  static bool exists = false;
+
+  if (!init) {
+    init = true;
+    exists = DeviceExists(kTpControl);
+  }
+  return exists;
 }
 
+void SetTapToClick(bool enabled) {
+  ExecuteScript(3, kTpControl, "taptoclick", enabled ? "on" : "off");
+}
+
 }  // namespace touchpad_settings
 
 namespace mouse_settings {
 
 bool MouseExists() {
-  // TODO(achuith, adlr): Call mouse_ctrl when it exists.
-  return false;
+  return DeviceExists(kMouseControl);
 }
 
 void SetPrimaryButtonRight(bool right) {
-  // TODO(achuith, adlr): Call mouse_ctrl when it exists.
+  ExecuteScript(3, kMouseControl, "swap_left_right", right ? "1" : "0");
 }
 
 }  // namespace mouse_settings