Readability improvements, exception handling improvements

man/lightdm-webkit2-greeter.1

@@ -50,11 +50,11 @@ expired\&.  The greeter should reset the authentication process\&.
 The following functions are available for the greeter to call to execute
 actions within LightDM\&.
 .PP
-\fBlightdm\&.authenticate(name)\fR
+\fBlightdm\&.authenticate(username)\fR
 .RS 4
-Specifies the name of the user we'd like to start authenticating as\&.  Note that
-if you pass an empty string (""), LightDM (via PAM) will issue a show_prompt()
-call to ask for the username\&. The older function
+Specifies the username of the user we'd like to start authenticating as\&.  Note that
+if you call lightdm.authenticate with no argument, LightDM (via PAM) will issue
+a show_prompt() call to ask for the username\&. The older function
 lightdm\&.start_authentication() has been deprecated\&.
 .RE
 .PP
@@ -85,11 +85,12 @@ Returns the value of a named hint provided by LightDM\&.
 Hibernates the system, if the greeter has the authority to do so\&.
 .RE
 .PP
-\fBlightdm\&.start_session_sync(user, session)\fR
+\fBlightdm\&.start_session_sync(session)\fR
 .RS 4
 Once LightDM has successfully authenticated the user, start the user's session
-by calling this function\&.  "user" is the authenticated user, and "session" is
-the user's session\&. The older function lightdm\&.login() has been
+by calling this function\&.  "session" is the authenticated user's session\&.
+If no session is passed, start the authenticated user with the system default
+session. The older function lightdm\&.login(user, session) has been
 deprecated\&.
 .RE
 .PP

src/lightdm-webkit2-greeter-ext.c

@@ -44,6 +44,12 @@ G_MODULE_EXPORT void webkit_web_extension_initialize(WebKitWebExtension *extensi
 
 guint64 page_id = -1;
 
+#define USER     ((LightDMUser *)    JSObjectGetPrivate (thisObject))
+#define LANGUAGE ((LightDMLanguage *)JSObjectGetPrivate (thisObject))
+#define LAYOUT   ((LightDMLayout *)  JSObjectGetPrivate (thisObject))
+#define SESSION  ((LightDMSession *) JSObjectGetPrivate (thisObject))
+#define GREETER  ((LightDMGreeter *) JSObjectGetPrivate (thisObject))
+
 static JSClassRef
 	lightdm_greeter_class,
 	gettext_class,
@@ -52,6 +58,14 @@ static JSClassRef
 	lightdm_layout_class,
 	lightdm_session_class;
 
+/*
+ * string_or_null.
+ *
+ * When passed a const gchar string, either return a JSValueRef string, or a
+ * JSValueRef Null reference if the string is NULL.  Used to ensure functions
+ * return proper string args.
+ */
+
 static JSValueRef
 string_or_null(JSContextRef context, const gchar *str) {
 	JSValueRef result;
@@ -67,16 +81,67 @@ string_or_null(JSContextRef context, const gchar *str) {
 	return result;
 }
 
-static JSValueRef
-mkexception (JSContextRef context, JSValueRef * exception, const gchar * str)
-{
+/*
+ * mkexception
+ *
+ * Convert a const string to an exception which can be passed back to webkit.
+ */
+
+static void
+_mkexception (JSContextRef context, JSValueRef * exception, const gchar * str) {
+	JSValueRef result;
 	JSStringRef string = JSStringCreateWithUTF8CString (str);
 	JSValueRef exceptionString = JSValueMakeString (context, string);
 	JSStringRelease (string);
-	*exception = JSValueToObject (context, exceptionString, NULL);
+	result = JSValueToObject (context, exceptionString, exception);
+	if (result != NULL)
+		*exception = result;
+}
+
+static JSValueRef
+	mkexception (JSContextRef context, JSValueRef * exception, const gchar * str) {
+	_mkexception (context, exception, str);
 return JSValueMakeNull (context);
 }
 
+/*
+ * arg_to_string
+ *
+ * Convert an JSValueRef argument to a g_malloc'd gchar string.  Calling function
+ * is responsible for g_freeing the string.
+ */
+
+static gchar *
+arg_to_string (JSContextRef context, JSValueRef arg, JSValueRef * exception) {
+	JSStringRef string;
+	size_t size;
+	gchar  *result;
+
+	if (JSValueGetType (context, arg) != kJSTypeString) {
+		_mkexception (context, exception, "Expected a string");
+		return NULL;
+	}
+
+	string = JSValueToStringCopy (context, arg, exception);
+	if (!string)
+		return NULL;
+	size = JSStringGetMaximumUTF8CStringSize (string);
+	result = g_malloc (size);
+	if (!result)
+		return NULL;
+	JSStringGetUTF8CString (string, result, size);
+	JSStringRelease (string);
+
+	return result;
+}
+
+/*
+ * escape
+ *
+ * Simple escape function to make sure strings have any single quote characters
+ * escaped.
+ */
+
 static char *
 escape (const gchar *text)
 {
@@ -114,8 +179,7 @@ get_user_name_cb(JSContextRef context,
 				 JSObjectRef thisObject,
 				 JSStringRef propertyName,
 				 JSValueRef *exception) {
-	LightDMUser *user = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_name(user));
+	return string_or_null(context, lightdm_user_get_name(USER));
 }
 
 
@@ -124,8 +188,7 @@ get_user_real_name_cb(JSContextRef context,
 					  JSObjectRef thisObject,
 					  JSStringRef propertyName,
 					  JSValueRef *exception) {
-	LightDMUser *user = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_real_name(user));
+	return string_or_null(context, lightdm_user_get_real_name(USER));
 }
 
 
@@ -134,8 +197,7 @@ get_user_display_name_cb(JSContextRef context,
 						 JSObjectRef thisObject,
 						 JSStringRef propertyName,
 						 JSValueRef *exception) {
-	LightDMUser *user = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_display_name(user));
+	return string_or_null(context, lightdm_user_get_display_name(USER));
 }
 
 
@@ -144,8 +206,7 @@ get_user_home_directory_cb(JSContextRef context,
 						 JSObjectRef thisObject,
 						 JSStringRef propertyName,
 						 JSValueRef *exception) {
-	LightDMUser *user = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_home_directory(user));
+	return string_or_null(context, lightdm_user_get_home_directory(USER));
 }
 
 static JSValueRef
@@ -153,8 +214,7 @@ get_user_image_cb(JSContextRef context,
 				  JSObjectRef thisObject,
 				  JSStringRef propertyName,
 				  JSValueRef *exception) {
-	LightDMUser *user = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_image(user));
+	return string_or_null(context, lightdm_user_get_image(USER));
 }
 
 
@@ -163,8 +223,7 @@ get_user_language_cb(JSContextRef context,
 					 JSObjectRef thisObject,
 					 JSStringRef propertyName,
 					 JSValueRef *exception) {
-	LightDMUser *user     = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_language(user)); 
+	return string_or_null(context, lightdm_user_get_language(USER)); 
 }
 
 
@@ -173,8 +232,7 @@ get_user_layout_cb(JSContextRef context,
 				   JSObjectRef thisObject,
 				   JSStringRef propertyName,
 				   JSValueRef *exception) {
-	LightDMUser *user   = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_layout(user));
+	return string_or_null(context, lightdm_user_get_layout(USER));
 }
 
 
@@ -183,8 +241,7 @@ get_user_session_cb(JSContextRef context,
 					JSObjectRef thisObject,
 					JSStringRef propertyName,
 					JSValueRef *exception) {
-	LightDMUser *user    = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_user_get_session(user));
+	return string_or_null(context, lightdm_user_get_session(USER));
 }
 
 
@@ -193,8 +250,7 @@ get_user_logged_in_cb(JSContextRef context,
 					  JSObjectRef thisObject,
 					  JSStringRef propertyName,
 					  JSValueRef *exception) {
-	LightDMUser *user = JSObjectGetPrivate(thisObject);
-	return JSValueMakeBoolean(context, lightdm_user_get_logged_in(user));
+	return JSValueMakeBoolean(context, lightdm_user_get_logged_in(USER));
 }
 
 
@@ -203,8 +259,7 @@ get_language_code_cb(JSContextRef context,
 					 JSObjectRef thisObject,
 					 JSStringRef propertyName,
 					 JSValueRef *exception) {
-	LightDMLanguage *language = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_language_get_code(language));
+	return string_or_null(context, lightdm_language_get_code(LANGUAGE));
 }
 
 
@@ -213,8 +268,7 @@ get_language_name_cb(JSContextRef context,
 					 JSObjectRef thisObject,
 					 JSStringRef propertyName,
 					 JSValueRef *exception) {
-	LightDMLanguage *language = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_language_get_name(language));
+	return string_or_null(context, lightdm_language_get_name(LANGUAGE));
 }
 
 
@@ -223,8 +277,7 @@ get_language_territory_cb(JSContextRef context,
 						  JSObjectRef thisObject,
 						  JSStringRef propertyName,
 						  JSValueRef *exception) {
-	LightDMLanguage *language = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_language_get_territory(language));
+	return string_or_null(context, lightdm_language_get_territory(LANGUAGE));
 }
 
 
@@ -233,8 +286,7 @@ get_layout_name_cb(JSContextRef context,
 				   JSObjectRef thisObject,
 				   JSStringRef propertyName,
 				   JSValueRef *exception) {
-	LightDMLayout *layout = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_layout_get_name(layout));
+	return string_or_null(context, lightdm_layout_get_name(LAYOUT));
 }
 
 
@@ -243,8 +295,7 @@ get_layout_short_description_cb(JSContextRef context,
 								JSObjectRef thisObject,
 								JSStringRef propertyName,
 								JSValueRef *exception) {
-	LightDMLayout *layout = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_layout_get_short_description(layout));
+	return string_or_null(context, lightdm_layout_get_short_description(LAYOUT));
 }
 
 
@@ -253,8 +304,7 @@ get_layout_description_cb(JSContextRef context,
 						  JSObjectRef thisObject,
 						  JSStringRef propertyName,
 						  JSValueRef *exception) {
-	LightDMLayout *layout = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_layout_get_description(layout));
+	return string_or_null(context, lightdm_layout_get_description(LAYOUT));
 }
 
 
@@ -263,8 +313,7 @@ get_session_key_cb(JSContextRef context,
 				   JSObjectRef thisObject,
 				   JSStringRef propertyName,
 				   JSValueRef *exception) {
-	LightDMSession *session = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_session_get_key(session));
+	return string_or_null(context, lightdm_session_get_key(SESSION));
 }
 
 
@@ -273,8 +322,7 @@ get_session_name_cb(JSContextRef context,
 					JSObjectRef thisObject,
 					JSStringRef propertyName,
 					JSValueRef *exception) {
-	LightDMSession *session = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_session_get_name(session));
+	return string_or_null(context, lightdm_session_get_name(SESSION));
 }
 
 
@@ -283,8 +331,7 @@ get_session_comment_cb(JSContextRef context,
 					   JSObjectRef thisObject,
 					   JSStringRef propertyName,
 					   JSValueRef *exception) {
-	LightDMSession *session = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_session_get_comment(session));
+	return string_or_null(context, lightdm_session_get_comment(SESSION));
 }
 
 
@@ -325,8 +372,11 @@ get_users_cb(JSContextRef context,
 		args[i] = JSObjectMake(context, lightdm_user_class, user);
 	}
 
-	array = JSObjectMakeArray(context, n_users, args, NULL);
+	array = JSObjectMakeArray(context, n_users, args, exception);
 	g_free(args);
+	if (array == NULL)
+		return JSValueMakeNull (context);
+	else
 		return array;
 }
 
@@ -350,8 +400,11 @@ get_languages_cb(JSContextRef context,
 		args[i] = JSObjectMake(context, lightdm_language_class, language);
 	}
 
-	array = JSObjectMakeArray(context, n_languages, args, NULL);
+	array = JSObjectMakeArray(context, n_languages, args, exception);
 	g_free(args);
+	if (array == NULL)
+		return JSValueMakeNull (context);
+	else
 		return array;
 }
 
@@ -384,8 +437,11 @@ get_layouts_cb(JSContextRef context,
 		args[i] = JSObjectMake(context, lightdm_layout_class, layout);
 	}
 
-	array = JSObjectMakeArray(context, n_layouts, args, NULL);
+	array = JSObjectMakeArray(context, n_layouts, args, exception);
 	g_free(args);
+	if (array == NULL)
+		return JSValueMakeNull (context);
+	else
 		return array;
 }
 
@@ -405,24 +461,12 @@ set_layout_cb(JSContextRef context,
 			  JSStringRef propertyName,
 			  JSValueRef value,
 			  JSValueRef *exception) {
-	JSStringRef layout_arg;
-	size_t	    layout_size;
 	gchar       *layout;
 	const GList *layouts, *link;
 
-	if (JSValueGetType(context, value) != kJSTypeString) {
-		JSStringRef string = JSStringCreateWithUTF8CString("Expected a string");
-		JSValueRef exceptionString = JSValueMakeString(context, string);
-		JSStringRelease(string);
-		*exception = JSValueToObject(context, exceptionString, NULL);
+	layout = arg_to_string (context, value, exception);
+	if (!layout)
 		return false;
-	}
-
-	layout_arg = JSValueToStringCopy(context, value, NULL);
-	layout_size = JSStringGetMaximumUTF8CStringSize(layout_arg);
-	layout = g_malloc (layout_size);
-	JSStringGetUTF8CString(layout_arg, layout, layout_size);
-	JSStringRelease(layout_arg);
 
 	layouts = lightdm_get_layouts ();
 	for (link = layouts; link; link = link->next)
@@ -459,8 +503,11 @@ get_sessions_cb(JSContextRef context,
 		args[i] = JSObjectMake(context, lightdm_session_class, session);
 	}
 
-	array = JSObjectMakeArray(context, n_sessions, args, NULL);
+	array = JSObjectMakeArray(context, n_sessions, args, exception);
 	g_free(args);
+	if (array == NULL)
+		return JSValueMakeNull (context);
+	else
 		return array;
 }
 
@@ -470,8 +517,7 @@ get_default_session_cb(JSContextRef context,
 					   JSObjectRef thisObject,
 					   JSStringRef propertyName,
 					   JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_greeter_get_default_session_hint(greeter));
+	return string_or_null(context, lightdm_greeter_get_default_session_hint(GREETER));
 }
 
 
@@ -480,8 +526,7 @@ get_lock_hint_cb(JSContextRef context,
 				 JSObjectRef thisObject,
 				 JSStringRef propertyName,
 				 JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	return JSValueMakeBoolean(context, lightdm_greeter_get_lock_hint(greeter));
+	return JSValueMakeBoolean(context, lightdm_greeter_get_lock_hint(GREETER));
 }
 
 
@@ -490,8 +535,7 @@ get_autologin_timeout_cb(JSContextRef context,
 						 JSObjectRef thisObject,
 						 JSStringRef propertyName,
 						 JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	return JSValueMakeNumber(context, lightdm_greeter_get_autologin_timeout_hint(greeter));
+	return JSValueMakeNumber(context, lightdm_greeter_get_autologin_timeout_hint(GREETER));
 }
 
 
@@ -502,12 +546,7 @@ cancel_autologin_cb(JSContextRef context,
 					  size_t argumentCount,
 					  const JSValueRef arguments[],
 					  JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
-	lightdm_greeter_cancel_autologin(greeter);
+	lightdm_greeter_cancel_autologin(GREETER);
 	return JSValueMakeNull(context);
 }
 
@@ -519,24 +558,12 @@ authenticate_cb(JSContextRef context,
 						size_t argumentCount,
 						const JSValueRef arguments[],
 						JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	JSStringRef    name_arg;
-	size_t         name_size;
-	gchar          *name;
-
-	if (!( argumentCount == 1 && JSValueGetType(context, arguments[0]) == kJSTypeString ))
-		return mkexception (context, exception, "Username argument not supplied");
-
-	name_arg = JSValueToStringCopy(context, arguments[0], NULL);
-	name_size = JSStringGetMaximumUTF8CStringSize(name_arg);
-	name = g_malloc (name_size);
-	JSStringGetUTF8CString(name_arg, name, name_size);
-	JSStringRelease(name_arg);
-
-        if (*name == '\0')
-	        lightdm_greeter_authenticate(greeter, NULL);
-        else
-	        lightdm_greeter_authenticate(greeter, name);
+	gchar          *name = NULL;
+
+	if (argumentCount > 0)
+		name = arg_to_string (context, arguments[0], exception);
+
+	lightdm_greeter_authenticate (GREETER, name);
 
 	g_free (name);
 	return JSValueMakeNull (context);
@@ -549,13 +576,7 @@ authenticate_as_guest_cb (JSContextRef context,
 				size_t argumentCount,
 				const JSValueRef arguments[],
 				JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
-	lightdm_greeter_authenticate_as_guest (greeter);
-
+	lightdm_greeter_authenticate_as_guest (GREETER);
 	return JSValueMakeNull (context);
 }
 
@@ -566,26 +587,18 @@ get_hint_cb (JSContextRef context,
 					size_t argumentCount,
 					const JSValueRef arguments[],
 					JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	JSStringRef hint_arg;
-	size_t hint_size;
 	gchar *hint_name;
-	JSStringRef hint;
 	JSValueRef result;
 
-	if (!(argumentCount == 1 && JSValueGetType (context, arguments[0]) == kJSTypeString))
+	if (argumentCount != 1)
 		return mkexception (context, exception, "Hint argument not supplied");
 
-	hint_arg = JSValueToStringCopy (context, arguments[0], NULL);
-	hint_size = JSStringGetMaximumUTF8CStringSize (hint_arg);
-	hint_name = g_malloc (hint_size);
-	JSStringGetUTF8CString (hint_arg, hint_name, hint_size);
-	JSStringRelease (hint_arg);
+	hint_name = arg_to_string (context, arguments[0], exception);
+	if (!hint_name)
+		return JSValueMakeNull (context);
 
-	hint = JSStringCreateWithUTF8CString (lightdm_greeter_get_hint (greeter, hint_name));
+	result = string_or_null (context, lightdm_greeter_get_hint (GREETER, hint_name));
 	g_free (hint_name);
-	result = JSValueMakeString (context, hint);
-        JSStringRelease (hint);
 
 	return result;
 }
@@ -598,21 +611,16 @@ respond_cb(JSContextRef context,
 				  size_t argumentCount,
 				  const JSValueRef arguments[],
 				  JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	JSStringRef    response_arg;
-	size_t         response_size;
 	gchar *response;
 
-	if (!( argumentCount == 1 && JSValueGetType(context, arguments[0]) == kJSTypeString ))
+	if (argumentCount != 1)
 		return mkexception (context, exception, "Response not supplied");
 
-	response_arg = JSValueToStringCopy(context, arguments[0], NULL);
-	response_size = JSStringGetMaximumUTF8CStringSize(response_arg);
-	response = g_malloc (response_size);
-	JSStringGetUTF8CString(response_arg, response, response_size);
-	JSStringRelease(response_arg);
+	response = arg_to_string (context, arguments[0], exception);
+	if (!response)
+		return JSValueMakeNull (context);
 
-	lightdm_greeter_respond(greeter, response);
+	lightdm_greeter_respond (GREETER, response);
 
 	g_free (response);
 	return JSValueMakeNull (context);
@@ -626,12 +634,7 @@ cancel_authentication_cb(JSContextRef context,
 						 size_t argumentCount,
 						 const JSValueRef arguments[],
 						 JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
-	lightdm_greeter_cancel_authentication(greeter);
+	lightdm_greeter_cancel_authentication(GREETER);
 	return JSValueMakeNull(context);
 }
 
@@ -641,8 +644,7 @@ get_authentication_user_cb(JSContextRef context,
 						   JSObjectRef thisObject,
 						   JSStringRef propertyName,
 						   JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	return string_or_null(context, lightdm_greeter_get_authentication_user(greeter));
+	return string_or_null(context, lightdm_greeter_get_authentication_user(GREETER));
 }
 
 static JSValueRef
@@ -650,8 +652,7 @@ get_has_guest_account_cb (JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	return JSValueMakeBoolean (context, lightdm_greeter_get_has_guest_account_hint (greeter));
+	return JSValueMakeBoolean (context, lightdm_greeter_get_has_guest_account_hint (GREETER));
 }
 
 static JSValueRef
@@ -659,8 +660,7 @@ get_hide_users_cb (JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	return JSValueMakeBoolean (context, lightdm_greeter_get_hide_users_hint (greeter));
+	return JSValueMakeBoolean (context, lightdm_greeter_get_hide_users_hint (GREETER));
 }
 
 static JSValueRef
@@ -668,8 +668,7 @@ get_select_user_cb (JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	return string_or_null (context, lightdm_greeter_get_select_user_hint (greeter));
+	return string_or_null (context, lightdm_greeter_get_select_user_hint (GREETER));
 }
 
 static JSValueRef
@@ -677,8 +676,7 @@ get_select_guest_cb (JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	return JSValueMakeBoolean (context, lightdm_greeter_get_select_guest_hint (greeter));
+	return JSValueMakeBoolean (context, lightdm_greeter_get_select_guest_hint (GREETER));
 }
 
 static JSValueRef
@@ -686,8 +684,7 @@ get_autologin_user_cb (JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	return string_or_null (context, lightdm_greeter_get_autologin_user_hint (greeter));
+	return string_or_null (context, lightdm_greeter_get_autologin_user_hint (GREETER));
 }
 
 static JSValueRef
@@ -695,8 +692,7 @@ get_autologin_guest_cb (JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef * exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate (thisObject);
-	return JSValueMakeBoolean (context, lightdm_greeter_get_autologin_guest_hint (greeter));
+	return JSValueMakeBoolean (context, lightdm_greeter_get_autologin_guest_hint (GREETER));
 }
 
 static JSValueRef
@@ -704,8 +700,7 @@ get_is_authenticated_cb(JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	return JSValueMakeBoolean(context, lightdm_greeter_get_is_authenticated(greeter));
+	return JSValueMakeBoolean(context, lightdm_greeter_get_is_authenticated(GREETER));
 }
 
 static JSValueRef
@@ -713,8 +708,7 @@ get_in_authentication_cb(JSContextRef context,
 						JSObjectRef thisObject,
 						JSStringRef propertyName,
 						JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	return JSValueMakeBoolean(context, lightdm_greeter_get_in_authentication(greeter));
+	return JSValueMakeBoolean(context, lightdm_greeter_get_in_authentication(GREETER));
 }
 
 static JSValueRef
@@ -733,9 +727,6 @@ suspend_cb(JSContextRef context,
 		   size_t argumentCount,
 		   const JSValueRef arguments[],
 		   JSValueRef *exception) {
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
 	lightdm_suspend(NULL);
 	return JSValueMakeNull(context);
 }
@@ -757,9 +748,6 @@ hibernate_cb(JSContextRef context,
 			 size_t argumentCount,
 			 const JSValueRef arguments[],
 			 JSValueRef *exception) {
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
 	lightdm_hibernate(NULL);
 	return JSValueMakeNull(context);
 }
@@ -781,9 +769,6 @@ restart_cb(JSContextRef context,
 		   size_t argumentCount,
 		   const JSValueRef arguments[],
 		   JSValueRef *exception) {
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
 	lightdm_restart(NULL);
 	return JSValueMakeNull(context);
 }
@@ -805,9 +790,6 @@ shutdown_cb(JSContextRef context,
 			size_t argumentCount,
 			const JSValueRef arguments[],
 			JSValueRef *exception) {
-	if (argumentCount != 0)
-		return mkexception (context, exception, "Argument count not zero");
-
 	lightdm_shutdown(NULL);
 	return JSValueMakeNull(context);
 }
@@ -820,35 +802,34 @@ start_session_sync_cb(JSContextRef context,
 		 size_t argumentCount,
 		 const JSValueRef arguments[],
 		 JSValueRef *exception) {
-	LightDMGreeter *greeter                 = JSObjectGetPrivate(thisObject);
-	JSStringRef    arg;
-	size_t         username_size, session_size;
-	gchar          *username, *session = NULL;
-
-	if (!((argumentCount == 1 && JSValueGetType (context, arguments[0]) == kJSTypeString) ||
-	      (argumentCount == 2 && JSValueGetType (context, arguments[0]) == kJSTypeString && JSValueGetType (context, arguments[1]) == kJSTypeString))) 
-		return mkexception (context, exception, "Username or Session incorrect");
+	gchar *session = NULL;
+	gboolean result;
+	GError *err = NULL;
 
-	arg = JSValueToStringCopy(context, arguments[0], NULL);
-	username_size = JSStringGetMaximumUTF8CStringSize(arg);
-	username = g_malloc (username_size);
-	JSStringGetUTF8CString(arg, username, username_size);
-	JSStringRelease(arg);
+	/* FIXME: old API required lightdm.login(username, session), but the username
+	 * is never actually used.  At some point, deprecate the old usage.  For now,
+	 * simply work around it. */
 
-	if (argumentCount > 1) {
-		arg     = JSValueToStringCopy(context, arguments[1], NULL);
-		session_size = JSStringGetMaximumUTF8CStringSize(arg);
-		session = g_malloc (session_size);
-		JSStringGetUTF8CString(arg, session, session_size);
-		JSStringRelease(arg);
+	if (argumentCount == 1)
+		session = arg_to_string (context, arguments[0], exception);
+	else if (argumentCount == 2)
+		session = arg_to_string (context, arguments[1], exception);
+	else if (argumentCount == 0)
+		session = NULL;
+	else {
+		_mkexception (context, exception, "Incorrect parameters");
+		return JSValueMakeBoolean (context, FALSE);
 	}
 
-	lightdm_greeter_start_session_sync(greeter, session, NULL);
+	result = lightdm_greeter_start_session_sync (GREETER, session, &err);
 
-        g_free(username);
 	g_free (session);
+	if (err != NULL) {
+		_mkexception (context, exception, err->message);
+		g_error_free (err);
+	}
 
-	return JSValueMakeNull(context);
+	return JSValueMakeBoolean (context, result);
 }
 
 
@@ -859,21 +840,16 @@ set_language_cb(JSContextRef context,
 				size_t argumentCount,
 				const JSValueRef arguments[],
 				JSValueRef *exception) {
-	LightDMGreeter *greeter = JSObjectGetPrivate(thisObject);
-	JSStringRef    arg;
-	size_t         language_size;
 	gchar *language;
 
-	if (!(argumentCount == 1 && JSValueGetType (context, arguments[0]) == kJSTypeString))
+	if (argumentCount != 1)
 		return mkexception (context, exception, "Language not supplied");
 
-	arg = JSValueToStringCopy(context, arguments[0], NULL);
-	language_size = JSStringGetMaximumUTF8CStringSize(arg);
-	language = g_malloc (language_size);
-	JSStringGetUTF8CString(arg, language, language_size);
-	JSStringRelease(arg);
+	language = arg_to_string (context, arguments[0], exception);
+	if (!language)
+		return JSValueMakeNull (context);
 
-	lightdm_greeter_set_language(greeter, language);
+	lightdm_greeter_set_language (GREETER, language);
 
 	g_free (language);
 	return JSValueMakeNull (context);
@@ -887,24 +863,17 @@ gettext_cb(JSContextRef context,
 		   size_t argumentCount,
 		   const JSValueRef arguments[],
 		   JSValueRef *exception) {
-	JSStringRef string_arg, text;
-	size_t      string_size;
 	gchar *string;
 	JSValueRef result;
 
-	if (!(argumentCount == 1 && JSValueGetType (context, arguments[0]) == kJSTypeString))
+	if (argumentCount != 1)
 		return mkexception (context, exception, "Argument not supplied");
 
-	string_arg = JSValueToStringCopy(context, arguments[0], NULL);
-	string_size = JSStringGetMaximumUTF8CStringSize(string_arg);
-	string = g_malloc (string_size);
-	JSStringGetUTF8CString(string_arg, string, string_size);
-	JSStringRelease(string_arg);
-
-	text = JSStringCreateWithUTF8CString(gettext(string));
+	string = arg_to_string (context, arguments[0], exception);
+	if (!string)
+		return JSValueMakeNull (context);
+	result = string_or_null (context, gettext (string));
 	g_free (string);
-	result = JSValueMakeString(context, text);
-	JSStringRelease (text);
 
 	return result;
 }
@@ -917,8 +886,6 @@ ngettext_cb(JSContextRef context,
 			size_t argumentCount,
 			const JSValueRef arguments[],
 			JSValueRef *exception) {
-	JSStringRef  string_arg, plural_string_arg, text;
-	size_t       string_size, plural_string_size;
 	gchar *string, *plural_string;
 	unsigned int n;
 	JSValueRef result;
@@ -926,25 +893,17 @@ ngettext_cb(JSContextRef context,
 	if (argumentCount != 3)
 		return mkexception (context, exception, "Needs 3 arguments");
 
-	string_arg = JSValueToStringCopy(context, arguments[0], NULL);
-	string_size = JSStringGetMaximumUTF8CStringSize(string_arg);
-	string = g_malloc (string_size);
-	JSStringGetUTF8CString(string_arg, string, string_size);
-	JSStringRelease(string_arg);
-
-	plural_string_arg = JSValueToStringCopy(context, arguments[1], NULL);
-	plural_string_size = JSStringGetMaximumUTF8CStringSize(plural_string_arg);
-	plural_string = g_malloc (plural_string_size);
-	JSStringGetUTF8CString(plural_string_arg, string, plural_string_size);
-	JSStringRelease(plural_string_arg);
-
-	n = JSValueToNumber(context, arguments[2], NULL);
+	string = arg_to_string (context, arguments[0], exception);
+	if (!string)
+		return JSValueMakeNull (context);
+	plural_string = arg_to_string (context, arguments[1], exception);
+	if (!plural_string)
+		return JSValueMakeNull (context);
+	n = JSValueToNumber (context, arguments[2], exception);
 
-	text = JSStringCreateWithUTF8CString(ngettext(string, plural_string, n));
+	result = string_or_null (context, ngettext (string, plural_string, n));
 	g_free (string);
 	g_free (plural_string);
-	result = JSValueMakeString(context, text);
-        JSStringRelease (text);
 
 	return result;
 }
@@ -1292,4 +1251,3 @@ webkit_web_extension_initialize(WebKitWebExtension *extension) {
 
 	lightdm_greeter_connect_sync(greeter, NULL);
 }
-

themes/simple/index.html

@@ -92,7 +92,7 @@
       function authentication_complete()
       {
         if (lightdm.is_authenticated) {
-          lightdm.start_session_sync (lightdm.authentication_user, lightdm.default_session);
+          lightdm.start_session_sync (); // Start default session
         } else {
           show_message ("Authentication Failed", "error");
           setTimeout (start_authentication, 3000);
@@ -130,7 +130,7 @@
       function start_authentication()
       {
         clear_messages();
-        lightdm.authenticate("");   // start with null userid, have pam prompt for userid.
+        lightdm.authenticate();   // start with null userid, have pam prompt for userid.
       }
 
       /*