Using aul_launch_app to launch screen-reader
[platform/upstream/at-spi2-core.git] / bus / at-spi-bus-launcher.c
index 334258c..08566d6 100644 (file)
 #include <stdio.h>
 
 #include <gio/gio.h>
+#ifdef HAVE_X11
 #include <X11/Xlib.h>
 #include <X11/Xatom.h>
+#endif
+
+#define APP_CONTROL_OPERATION_SCREEN_READ "http://tizen.org/appcontrol/operation/read_screen"
+#include <appsvc.h>
+#include <vconf.h>
+#include <dlog.h>
+#include <aul.h>
 
 typedef enum {
   A11Y_BUS_STATE_IDLE = 0,
@@ -44,10 +52,16 @@ typedef struct {
   GMainLoop *loop;
   gboolean launch_immediately;
   gboolean a11y_enabled;
+  gboolean screen_reader_enabled;
   GDBusConnection *session_bus;
-  GSettings *desktop_schema;
+  GSettings *a11y_schema;
+  GSettings *interface_schema;
+
+  gboolean screen_reader_needed;
+  int pid;
 
   A11yBusState state;
+
   /* -1 == error, 0 == pending, > 0 == running */
   int a11y_bus_pid;
   char *a11y_bus_address;
@@ -66,6 +80,7 @@ static const gchar introspection_xml[] =
   "  </interface>"
   "<interface name='org.a11y.Status'>"
   "<property name='IsEnabled' type='b' access='readwrite'/>"
+  "<property name='ScreenReaderEnabled' type='b' access='readwrite'/>"
   "</interface>"
   "</node>";
 static GDBusNodeInfo *introspection_data = NULL;
@@ -184,6 +199,7 @@ ensure_a11y_bus (A11yBusLauncher *app)
   app->a11y_bus_address = g_strchomp (g_strdup (addr_buf));
   g_debug ("a11y bus address: %s", app->a11y_bus_address);
 
+#ifdef HAVE_X11
   {
     Display *display = XOpenDisplay (NULL);
     if (display)
@@ -198,6 +214,7 @@ ensure_a11y_bus (A11yBusLauncher *app)
         XCloseDisplay (display);
       }
   }
+#endif
 
   return TRUE;
   
@@ -246,38 +263,81 @@ handle_get_property  (GDBusConnection       *connection,
   A11yBusLauncher *app = user_data;
 
   if (g_strcmp0 (property_name, "IsEnabled") == 0)
-    {
-      return g_variant_new ("(b)", app->a11y_enabled);
-    }
+    return g_variant_new ("b", app->a11y_enabled);
+  else if (g_strcmp0 (property_name, "ScreenReaderEnabled") == 0)
+    return g_variant_new ("b", app->screen_reader_enabled);
   else
     return NULL;
 }
 
+static void
 handle_a11y_enabled_change (A11yBusLauncher *app, gboolean enabled,
                                gboolean notify_gsettings)
 {
-  GVariantBuilder *builder;
-  GVariantBuilder *invalidated_builder;
+  GVariantBuilder builder;
+  GVariantBuilder invalidated_builder;
 
   if (enabled == app->a11y_enabled)
     return;
 
   app->a11y_enabled = enabled;
 
-  if (notify_gsettings && app->desktop_schema)
-    g_settings_set_boolean (app->desktop_schema, "toolkit-accessibility",
-                            enabled);
+  if (notify_gsettings && app->interface_schema)
+    {
+      g_settings_set_boolean (app->interface_schema, "toolkit-accessibility",
+                              enabled);
+      g_settings_sync ();
+    }
 
-  builder = g_variant_builder_new (G_VARIANT_TYPE_ARRAY);
-  invalidated_builder = g_variant_builder_new (G_VARIANT_TYPE ("as"));
-  g_variant_builder_add (builder, "{sv}", "IsEnabled",
+  g_variant_builder_init (&builder, G_VARIANT_TYPE_ARRAY);
+  g_variant_builder_init (&invalidated_builder, G_VARIANT_TYPE ("as"));
+  g_variant_builder_add (&builder, "{sv}", "IsEnabled",
                          g_variant_new_boolean (enabled));
 
   g_dbus_connection_emit_signal (app->session_bus, NULL, "/org/a11y/bus",
-                                 "org.freedesktop.DBus", "PropertiesChanged",
+                                 "org.freedesktop.DBus.Properties",
+                                 "PropertiesChanged",
                                  g_variant_new ("(sa{sv}as)", "org.a11y.Status",
-                                                builder,
-                                                invalidated_builder),
+                                                &builder,
+                                                &invalidated_builder),
+                                 NULL);
+}
+
+static void
+handle_screen_reader_enabled_change (A11yBusLauncher *app, gboolean enabled,
+                               gboolean notify_gsettings)
+{
+  GVariantBuilder builder;
+  GVariantBuilder invalidated_builder;
+
+  if (enabled == app->screen_reader_enabled)
+    return;
+
+  /* If the screen reader is being enabled, we should enable accessibility
+   * if it isn't enabled already */
+  if (enabled)
+    handle_a11y_enabled_change (app, enabled, notify_gsettings);
+
+  app->screen_reader_enabled = enabled;
+
+  if (notify_gsettings && app->a11y_schema)
+    {
+      g_settings_set_boolean (app->a11y_schema, "screen-reader-enabled",
+                              enabled);
+      g_settings_sync ();
+    }
+
+  g_variant_builder_init (&builder, G_VARIANT_TYPE_ARRAY);
+  g_variant_builder_init (&invalidated_builder, G_VARIANT_TYPE ("as"));
+  g_variant_builder_add (&builder, "{sv}", "ScreenReaderEnabled",
+                         g_variant_new_boolean (enabled));
+
+  g_dbus_connection_emit_signal (app->session_bus, NULL, "/org/a11y/bus",
+                                 "org.freedesktop.DBus.Properties",
+                                 "PropertiesChanged",
+                                 g_variant_new ("(sa{sv}as)", "org.a11y.Status",
+                                                &builder,
+                                                &invalidated_builder),
                                  NULL);
 }
 
@@ -292,21 +352,28 @@ handle_set_property  (GDBusConnection       *connection,
                     gpointer               user_data)
 {
   A11yBusLauncher *app = user_data;
+  const gchar *type = g_variant_get_type_string (value);
+  gboolean enabled;
+  
+  if (g_strcmp0 (type, "b") != 0)
+    {
+      g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
+                       "org.a11y.Status.%s expects a boolean but got %s", property_name, type);
+      return FALSE;
+    }
+
+  enabled = g_variant_get_boolean (value);
 
   if (g_strcmp0 (property_name, "IsEnabled") == 0)
     {
-      const gchar *type = g_variant_get_type_string (value);
-      gboolean enabled;
-      if (g_strcmp0 (type, "b") != 0)
-        {
-          g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
-                       "org.a11y.Status.IsEnabled expects a boolean but got %s", type);
-          return FALSE;
-        }
-      enabled = g_variant_get_boolean (value);
       handle_a11y_enabled_change (app, enabled, TRUE);
       return TRUE;
     }
+  else if (g_strcmp0 (property_name, "ScreenReaderEnabled") == 0)
+    {
+      handle_screen_reader_enabled_change (app, enabled, TRUE);
+      return TRUE;
+    }
   else
     {
       g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
@@ -364,15 +431,18 @@ on_bus_acquired (GDBusConnection *connection,
                                                        NULL,
                                                        &error);
   if (registration_id == 0)
-    g_error ("%s", error->message);
+    {
+      g_error ("%s", error->message);
+      g_clear_error (&error);
+    }
 
   g_dbus_connection_register_object (connection,
-                                                       "/org/a11y/bus",
-                                                       introspection_data->interfaces[1],
-                                                       &status_vtable,
-                                                       _global_app,
-                                                       NULL,
-                                                       &error);
+                                     "/org/a11y/bus",
+                                     introspection_data->interfaces[1],
+                                     &status_vtable,
+                                     _global_app,
+                                     NULL,
+                                     NULL);
 }
 
 static void
@@ -436,6 +506,7 @@ init_sigterm_handling (A11yBusLauncher *app)
 static gboolean
 already_running ()
 {
+#ifdef HAVE_X11
   Atom AT_SPI_BUS;
   Atom actual_type;
   Display *bridge_display;
@@ -460,12 +531,8 @@ already_running ()
   if (data)
   {
     GDBusConnection *bus;
-    GError *error = NULL;
-    const gchar *old_session = g_getenv ("DBUS_SESSION_BUS_ADDRESS");
-    /* TODO: Is there a better way to connect? This is really hacky */
-    g_setenv ("DBUS_SESSION_BUS_ADDRESS", data, TRUE);
-    bus = g_bus_get_sync (G_BUS_TYPE_SESSION, NULL, &error);
-    g_setenv ("DBUS_SESSION_BUS_ADDRESS", old_session, TRUE);
+    bus = g_dbus_connection_new_for_address_sync ((const gchar *)data, 0,
+                                                  NULL, NULL, NULL);
     if (bus != NULL)
       {
         result = TRUE;
@@ -475,10 +542,13 @@ already_running ()
 
   XCloseDisplay (bridge_display);
   return result;
+#else
+  return FALSE;
+#endif
 }
 
 static GSettings *
-get_desktop_schema ()
+get_schema (const gchar *name)
 {
   const char * const *schemas = NULL;
   gint i;
@@ -486,7 +556,7 @@ get_desktop_schema ()
   schemas = g_settings_list_schemas ();
   for (i = 0; schemas[i]; i++)
   {
-    if (!strcmp (schemas[i], "org.gnome.desktop.interface"))
+    if (!strcmp (schemas[i], name))
       return g_settings_new (schemas[i]);
   }
 
@@ -499,10 +569,72 @@ gsettings_key_changed (GSettings *gsettings, const gchar *key, void *user_data)
   gboolean new_val = g_settings_get_boolean (gsettings, key);
   A11yBusLauncher *app = user_data;
 
-  if (strcmp (key, "toolkit-accessibility") != 0)
-    return;
+  if (!strcmp (key, "toolkit-accessibility"))
+    handle_a11y_enabled_change (_global_app, new_val, FALSE);
+  else if (!strcmp (key, "screen-reader-enabled"))
+    handle_screen_reader_enabled_change (_global_app, new_val, FALSE);
+}
+
+static gboolean
+_launch_screen_reader(A11yBusLauncher *bl)
+{
+   bundle *kb = NULL;
+   gboolean ret = FALSE;
+
+   kb = bundle_create();
+   if (kb == NULL)
+     return FALSE;
+
+   bl->pid = aul_launch_app("org.tizen.screen-reader", kb);
+   if (bl->pid >= 0) {
+       ret = TRUE;
+   }
+
+   bundle_free(kb);
+   return ret;
+}
+
+static gboolean
+_terminate_screen_reader(A11yBusLauncher *bl)
+{
+   int ret;
+   if (bl->pid <= 0)
+     return FALSE;
+
+   LOGD("terminate process with pid %d", bl->pid);
+   if (!aul_terminate_pid(bl->pid))
+     {
+        bl->pid = 0;
+        return TRUE;
+     }
+
+   LOGD("Unable to terminate process using aul api. Sending SIGTERM signal");
+   ret = kill(bl->pid, SIGTERM);
+   if (!ret)
+     {
+        bl->pid = 0;
+        return TRUE;
+     }
+
+   LOGD("Unable to terminate process: %d with api or signal.", bl->pid);
+   return FALSE;
+}
 
-  handle_a11y_enabled_change (_global_app, new_val, FALSE);
+void screen_reader_cb(keynode_t *node, void *user_data)
+{
+   A11yBusLauncher *bl = user_data;
+   int ret;
+
+   ret = vconf_keynode_get_bool(node);
+   if (ret < 0)
+     return;
+
+   bl->screen_reader_needed = ret;
+
+   if (!bl->screen_reader_needed && (bl->pid > 0))
+     _terminate_screen_reader(bl);
+   else if (bl->screen_reader_needed && (bl->pid <= 0))
+     _launch_screen_reader(bl);
 }
 
 int
@@ -514,10 +646,9 @@ main (int    argc,
   GDBusConnection *session_bus;
   int name_owner_id;
   gboolean a11y_set = FALSE;
+  gboolean screen_reader_set = FALSE;
   gint i;
 
-  g_type_init ();
-
   if (already_running ())
     return 0;
 
@@ -530,20 +661,40 @@ main (int    argc,
         _global_app->launch_immediately = TRUE;
       else if (sscanf (argv[i], "--a11y=%d", &_global_app->a11y_enabled) == 2)
         a11y_set = TRUE;
+      else if (sscanf (argv[i], "--screen-reader=%d",
+                       &_global_app->screen_reader_enabled) == 2)
+        screen_reader_set = TRUE;
     else
-      g_error ("usage: %s [--launch-immediately] [--a11y=0|1]", argv[0]);
+      g_error ("usage: %s [--launch-immediately] [--a11y=0|1] [--screen-reader=0|1]", argv[0]);
     }
 
+  _global_app->interface_schema = get_schema ("org.gnome.desktop.interface");
+  _global_app->a11y_schema = get_schema ("org.gnome.desktop.a11y.applications");
+
   if (!a11y_set)
-    _global_app->a11y_enabled = _global_app->launch_immediately;
+    {
+      _global_app->a11y_enabled = _global_app->interface_schema
+                                  ? g_settings_get_boolean (_global_app->interface_schema, "toolkit-accessibility")
+                                  : _global_app->launch_immediately;
+    }
 
-  _global_app->desktop_schema = get_desktop_schema ();
+  if (!screen_reader_set)
+    {
+      _global_app->screen_reader_enabled = _global_app->a11y_schema
+                                  ? g_settings_get_boolean (_global_app->a11y_schema, "screen-reader-enabled")
+                                  : FALSE;
+    }
 
-  if (_global_app->desktop_schema)
-    g_signal_connect (_global_app->desktop_schema,
+  if (_global_app->interface_schema)
+    g_signal_connect (_global_app->interface_schema,
                       "changed::toolkit-accessibility",
                       G_CALLBACK (gsettings_key_changed), _global_app);
 
+  if (_global_app->a11y_schema)
+    g_signal_connect (_global_app->a11y_schema,
+                      "changed::screen-reader-enabled",
+                      G_CALLBACK (gsettings_key_changed), _global_app);
+
   init_sigterm_handling (_global_app);
 
   introspection_data = g_dbus_node_info_new_for_xml (introspection_xml, NULL);
@@ -558,6 +709,21 @@ main (int    argc,
                                   _global_app,
                                   NULL);
 
+  int ret = vconf_get_bool(VCONFKEY_SETAPPL_ACCESSIBILITY_TTS, &_global_app->screen_reader_needed);
+  if (ret != 0)
+    {
+      LOGD("Could not read VCONFKEY_SETAPPL_ACCESSIBILITY_TTS key value.\n");
+      return FALSE;
+    }
+  ret = vconf_notify_key_changed(VCONFKEY_SETAPPL_ACCESSIBILITY_TTS, screen_reader_cb, _global_app);
+  if(ret != 0)
+    {
+      LOGD("Could not add information level callback\n");
+      return FALSE;
+    }
+  if (_global_app->screen_reader_needed)
+    _launch_screen_reader(_global_app);
+
   g_main_loop_run (_global_app->loop);
 
   if (_global_app->a11y_bus_pid > 0)
@@ -567,6 +733,7 @@ main (int    argc,
    * GDM is launching a login on an X server it was using before,
    * we don't want early login processes to pick up the stale address.
    */
+#ifdef HAVE_X11
   {
     Display *display = XOpenDisplay (NULL);
     if (display)
@@ -580,6 +747,7 @@ main (int    argc,
         XCloseDisplay (display);
       }
   }
+#endif
 
   if (_global_app->a11y_launch_error_message)
     {