From 21266a4e713b262de0a931e668723d78f7278535 Mon Sep 17 00:00:00 2001
From: Wu Xiaotian <yetist@gmail.com>
Date: Mon, 1 Jul 2019 18:15:34 +0800
Subject: launch lightdm-settings if installed

---
 capplets/accessibility/at-properties/main.c | 50 ++++++++++++++++-------------
 1 file changed, 28 insertions(+), 22 deletions(-)

diff --git a/capplets/accessibility/at-properties/main.c b/capplets/accessibility/at-properties/main.c
index 44e07563..83bbe8f4 100644
--- a/capplets/accessibility/at-properties/main.c
+++ b/capplets/accessibility/at-properties/main.c
@@ -1,6 +1,7 @@
 #include <config.h>
 #include <gtk/gtk.h>
 #include <gio/gio.h>
+#include <gio/gdesktopappinfo.h>
 #include "dm-util.h"
 
 #include <dbus/dbus-glib.h>
@@ -24,6 +25,23 @@ enum {
 
 static gboolean initial_state;
 
+static GDesktopAppInfo *get_desktop_app_info_from_dm (void)
+{
+    DMType dm_type;
+    GDesktopAppInfo *app_info = NULL;
+
+    dm_type = dm_get_type();
+    if (dm_type == DM_TYPE_MDM) {
+        app_info = g_desktop_app_info_new ("mdmsetup.desktop");
+    } else if (dm_type == DM_TYPE_LIGHTDM) {
+        app_info = g_desktop_app_info_new ("lightdm-settings.desktop");
+        if (app_info == NULL) {
+            app_info = g_desktop_app_info_new ("lightdm-gtk-greeter-settings.desktop");
+        }
+    }
+    return app_info;
+}
+
 static GtkBuilder *
 create_builder (void)
 {
@@ -34,8 +52,7 @@ create_builder (void)
 
     if (gtk_builder_add_from_resource (builder, "/org/mate/mcc/accessibility/at/at-enable-dialog.ui", &error)) {
         GObject *object;
-        gchar *prog = NULL;
-        DMType dm_type;
+        GDesktopAppInfo *app_info = NULL;
 
         object = gtk_builder_get_object (builder, "at_enable_image");
         gtk_image_set_from_file (GTK_IMAGE (object),
@@ -45,18 +62,13 @@ create_builder (void)
                                          "at_applications_image");
         gtk_image_set_from_file (GTK_IMAGE (object),
                                  PIXMAPDIR "/at-support.png");
-
-        dm_type = dm_get_type();
-        if (dm_type == DM_TYPE_MDM) {
-            prog = g_find_program_in_path ("mdmsetup");
-        } else if (dm_type == DM_TYPE_LIGHTDM) {
-            prog = g_find_program_in_path ("lightdm-gtk-greeter-settings-pkexec");
-        }
-        if (prog == NULL) {
+        app_info = get_desktop_app_info_from_dm ();
+        if (app_info == NULL) {
             object = gtk_builder_get_object (builder, "login_button");
             gtk_widget_hide (GTK_WIDGET (object));
+        } else {
+            g_object_unref (app_info);
         }
-        g_free (prog);
 
     } else {
         g_warning ("Could not load UI: %s", error->message);
@@ -89,19 +101,13 @@ cb_mouse_preferences (GtkDialog *dialog, gint response_id)
 static void
 cb_login_preferences (GtkDialog *dialog, gint response_id)
 {
-    DMType dm_type;
-    gchar *prog = NULL;
+    GDesktopAppInfo *app_info = NULL;
 
-    dm_type = dm_get_type();
-    if (dm_type == DM_TYPE_MDM) {
-        prog = g_find_program_in_path ("mdmsetup");
-    } else if (dm_type == DM_TYPE_LIGHTDM) {
-        prog = g_find_program_in_path ("lightdm-gtk-greeter-settings-pkexec");
-    }
+    app_info = get_desktop_app_info_from_dm ();
 
-    if (prog != NULL) {
-        g_spawn_command_line_async (prog, NULL);
-        g_free(prog);
+    if (app_info != NULL) {
+        g_app_info_launch (G_APP_INFO(app_info),  NULL, NULL, NULL);
+        g_object_unref (app_info);
     }
 }
 
-- 
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