/* -*- mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
- *
- * at-spi-bus-launcher: Manage the a11y bus as a child process
+ *
+ * at-spi-bus-launcher: Manage the a11y bus as a child process
*
* Copyright 2011 Red Hat, Inc.
*
#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>
+
+//uncomment if you want debug
+//#ifndef TIZEN_ENGINEER_MODE
+//#define TIZEN_ENGINEER_MODE
+//#endif
+#ifdef LOG_TAG
+#undef LOG_TAG
+#endif
+
+#define LOG_TAG "ATSPI_BUS_LAUNCHER"
+
+#include <dlog.h>
+#include <aul.h>
+
+//uncomment this if you want log suring startup
+//seems like dlog is not working at startup time
+#define ATSPI_BUS_LAUNCHER_LOG_TO_FILE
+
+#ifdef ATSPI_BUS_LAUNCHER_LOG_TO_FILE
+FILE *log_file;
+#ifdef LOGD
+#undef LOGD
+#endif
+#define LOGD(arg...) do {if (log_file) {fprintf(log_file, ##arg);fprintf(log_file, "\n"); fflush(log_file);}} while(0)
+#endif
+
+static gboolean _launch_screen_reader_repeat_until_success(gpointer user_data);
typedef enum {
A11Y_BUS_STATE_IDLE = 0,
typedef struct {
GMainLoop *loop;
gboolean launch_immediately;
+ gboolean a11y_enabled;
+ gboolean screen_reader_enabled;
GDBusConnection *session_bus;
+ GSettings *a11y_schema;
+ GSettings *interface_schema;
+
+ int launch_screen_reader_repeats;
+ gboolean screen_reader_needed;
+ int pid;
A11yBusState state;
+
/* -1 == error, 0 == pending, > 0 == running */
int a11y_bus_pid;
char *a11y_bus_address;
" </method>"
" </interface>"
"<interface name='org.a11y.Status'>"
- "<property name='IsEnabled' type='b' access='read'/>"
+ "<property name='IsEnabled' type='b' access='readwrite'/>"
+ "<property name='ScreenReaderEnabled' type='b' access='readwrite'/>"
"</interface>"
"</node>";
static GDBusNodeInfo *introspection_data = NULL;
#ifdef __linux
#include <sys/prctl.h>
prctl (PR_SET_PDEATHSIG, 15);
-#endif
+#endif
}
/**
gpointer data)
{
A11yBusLauncher *app = data;
-
+
app->a11y_bus_pid = -1;
app->state = A11Y_BUS_STATE_ERROR;
if (app->a11y_launch_error_message == NULL)
app->a11y_launch_error_message = g_strdup_printf ("Bus stopped by signal %d", WSTOPSIG (status));
}
g_main_loop_quit (app->loop);
-}
+}
-static void
+static gboolean
ensure_a11y_bus (A11yBusLauncher *app)
{
GPid pid;
GError *error = NULL;
if (app->a11y_bus_pid != 0)
- return;
-
+ return FALSE;
+
argv[1] = g_strdup_printf ("--config-file=%s/at-spi2/accessibility.conf", SYSCONFDIR);
if (pipe (app->pipefd) < 0)
g_error ("Failed to create pipe: %s", strerror (errno));
-
+
if (!g_spawn_async (NULL,
argv,
NULL,
app->state = A11Y_BUS_STATE_READING_ADDRESS;
app->a11y_bus_pid = pid;
- g_debug ("Launched a11y bus, child is %ld", (long) pid);
+ LOGD("Launched a11y bus, child is %ld", (long) pid);
if (!unix_read_all_fd_to_string (app->pipefd[0], addr_buf, sizeof (addr_buf)))
{
app->a11y_launch_error_message = g_strdup_printf ("Failed to read address: %s", strerror (errno));
/* Trim the trailing newline */
app->a11y_bus_address = g_strchomp (g_strdup (addr_buf));
- g_debug ("a11y bus address: %s", app->a11y_bus_address);
+ LOGD("a11y bus address: %s", app->a11y_bus_address);
+#ifdef HAVE_X11
{
Display *display = XOpenDisplay (NULL);
if (display)
XCloseDisplay (display);
}
}
+#endif
+
+ if (argv[1]) g_free(argv[1]);
+
+ return TRUE;
- return;
-
error:
+ if (argv[1]) g_free(argv[1]);
close (app->pipefd[0]);
close (app->pipefd[1]);
app->state = A11Y_BUS_STATE_ERROR;
+
+ return FALSE;
}
static void
A11yBusLauncher *app = user_data;
if (g_strcmp0 (property_name, "IsEnabled") == 0)
+ 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;
+
+ if (enabled == app->a11y_enabled)
+ return;
+
+ app->a11y_enabled = enabled;
+
+ if (notify_gsettings && app->interface_schema)
{
- gboolean result = (app->a11y_bus_pid > 0);
- return g_variant_new ("(b)", result);
+ g_settings_set_boolean (app->interface_schema, "toolkit-accessibility",
+ 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}", "IsEnabled",
+ 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);
+ g_variant_builder_clear (&builder);
+ g_variant_builder_clear (&invalidated_builder);
+}
+
+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);
+ g_variant_builder_clear (&builder);
+ g_variant_builder_clear (&invalidated_builder);
+}
+
+static gboolean
+handle_set_property (GDBusConnection *connection,
+ const gchar *sender,
+ const gchar *object_path,
+ const gchar *interface_name,
+ const gchar *property_name,
+ GVariant *value,
+ GError **error,
+ 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)
+ {
+ 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
- return NULL;
+ {
+ g_set_error (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS,
+ "Unknown property '%s'", property_name);
+ return FALSE;
+ }
}
static const GDBusInterfaceVTable bus_vtable =
{
NULL, /* handle_method_call */
handle_get_property,
- NULL /* handle_set_property */
+ handle_set_property
};
static void
A11yBusLauncher *app = user_data;
GError *error;
guint registration_id;
-
+
if (connection == NULL)
{
g_main_loop_quit (app->loop);
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
gpointer data)
{
A11yBusLauncher *app = data;
-
+
g_main_loop_quit (app->loop);
return FALSE;
static gboolean
already_running ()
{
+#ifdef HAVE_X11
Atom AT_SPI_BUS;
Atom actual_type;
Display *bridge_display;
bridge_display = XOpenDisplay (NULL);
if (!bridge_display)
return FALSE;
-
+
AT_SPI_BUS = XInternAtom (bridge_display, "AT_SPI_BUS", False);
XGetWindowProperty (bridge_display,
XDefaultRootWindow (bridge_display),
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;
- g_object_unref (bus);
+ {
+ result = TRUE;
+ g_object_unref (bus);
+ }
}
XCloseDisplay (bridge_display);
return result;
+#else
+ return FALSE;
+#endif
+}
+
+static GSettings *
+get_schema (const gchar *name)
+{
+ const char * const *schemas = NULL;
+ gint i;
+
+ schemas = g_settings_list_schemas ();
+ for (i = 0; schemas[i]; i++)
+ {
+ if (!strcmp (schemas[i], name))
+ return g_settings_new (schemas[i]);
+ }
+
+ return NULL;
+}
+
+static void
+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"))
+ 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 int
+_screen_reader_dead_tracker (int pid, void *data)
+{
+ A11yBusLauncher *app = data;
+
+ if (app->pid > 0 && pid == app->pid)
+ {
+ LOGE("screen reader is dead, pid: %d, restarting", pid);
+ app->pid = 0;
+ g_timeout_add_seconds (2, _launch_screen_reader_repeat_until_success, app);
+ }
+ return 0;
+}
+
+static gboolean
+_launch_screen_reader(gpointer user_data, gboolean by_vconf_change)
+{
+ A11yBusLauncher *bl = user_data;
+ LOGD("Launching screen reader");
+
+ bundle *kb = NULL;
+ gboolean ret = FALSE;
+
+ kb = bundle_create();
+
+ if (kb == NULL)
+ {
+ LOGD("Can't create bundle");
+ return FALSE;
+ }
+
+ if (by_vconf_change)
+ {
+ if (bundle_add_str(kb, "by_vconf_change", "yes") != BUNDLE_ERROR_NONE)
+ {
+ LOGD("Can't add information to bundle");
+ }
+ }
+
+ int operation_error = appsvc_set_operation(kb, APP_CONTROL_OPERATION_SCREEN_READ);
+ LOGD("appsvc_set_operation: %i", operation_error);
+
+ bl->pid = appsvc_run_service(kb, 0, NULL, NULL);
+
+ if (bl->pid > 0)
+ {
+ LOGD("Screen reader launched with pid: %i", bl->pid);
+ LOGD("registering screen reader dead tracker");
+ aul_listen_app_dead_signal(_screen_reader_dead_tracker, bl);
+ ret = TRUE;
+ }
+ else
+ {
+ LOGD("Can't start screen-reader - error code: %i", bl->pid);
+ }
+
+
+ bundle_free(kb);
+ return ret;
}
+static gboolean
+_launch_screen_reader_repeat_until_success(gpointer user_data) {
+ A11yBusLauncher *bl = user_data;
+
+ if (bl->launch_screen_reader_repeats > 100 || bl->pid > 0)
+ {
+ //do not try anymore
+ return FALSE;
+ }
+
+ gboolean ret = _launch_screen_reader(user_data, FALSE);
+
+ if (ret)
+ {
+ //we managed to
+ bl->launch_screen_reader_repeats = 0;
+ return FALSE;
+ }
+ //try again
+ return TRUE;
+}
+
+static gboolean
+_terminate_screen_reader(A11yBusLauncher *bl)
+{
+ LOGD("Terminating screen reader");
+ int ret;
+ int ret_aul;
+ if (bl->pid <= 0)
+ return FALSE;
+
+
+ LOGD("unregistering screen reader dead tracker");
+ aul_listen_app_dead_signal(NULL, NULL);
+
+ int status = aul_app_get_status_bypid(bl->pid);
+
+ if (status < 0)
+ {
+ LOGD("App with pid %d already terminated", bl->pid);
+ bl->pid = 0;
+ return TRUE;
+ }
+
+ LOGD("terminate process with pid %d", bl->pid);
+ ret_aul = aul_terminate_pid(bl->pid);
+ if (ret_aul >= 0)
+ {
+ LOGD("Terminating with aul_terminate_pid: return is %d", ret_aul);
+ bl->pid = 0;
+ return TRUE;
+ }
+ else
+ LOGD("aul_terminate_pid failed: return is %d", ret_aul);
+
+ 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;
+}
+
+void screen_reader_cb(keynode_t *node, void *user_data)
+{
+ A11yBusLauncher *bl = user_data;
+ int ret;
+
+ ret = vconf_keynode_get_bool(node);
+ LOGD("vconf_keynode_get_bool(node): %i", ret);
+ if (ret < 0)
+ return;
+
+ //check if process really exists (e.g didn't crash)
+ if (bl->pid > 0)
+ {
+ int err = kill(bl->pid,0);
+ //process doesn't exist
+ if (err == ESRCH)
+ bl->pid = 0;
+ }
+
+ bl->screen_reader_needed = ret;
+ LOGD("bl->screen_reader_needed: %i, bl->pid: %i", ret, bl->pid);
+ 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, TRUE);
+}
int
main (int argc,
char **argv)
{
+#ifdef ATSPI_BUS_LAUNCHER_LOG_TO_FILE
+ log_file = fopen("/tmp/at-spi-bus-launcher.log", "a");
+#endif
+
+ LOGD("Starting atspi bus launcher");
GError *error = NULL;
GMainLoop *loop;
GDBusConnection *session_bus;
int name_owner_id;
-
- g_type_init ();
+ gboolean a11y_set = FALSE;
+ gboolean screen_reader_set = FALSE;
+ gint i;
if (already_running ())
- return 0;
+ {
+ LOGD("atspi bus launcher is already running");
+ return 0;
+ }
_global_app = g_slice_new0 (A11yBusLauncher);
_global_app->loop = g_main_loop_new (NULL, FALSE);
- _global_app->launch_immediately = (argc == 2 && strcmp (argv[1], "--launch-immediately") == 0);
+ _global_app->launch_screen_reader_repeats = 0;
+
+ for (i = 1; i < argc; i++)
+ {
+ if (!strcmp (argv[i], "--launch-immediately"))
+ _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] [--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->interface_schema
+ ? g_settings_get_boolean (_global_app->interface_schema, "toolkit-accessibility")
+ : _global_app->launch_immediately;
+ }
+
+ 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->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);
_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)
+ g_timeout_add_seconds(2,_launch_screen_reader_repeat_until_success, _global_app);
+
g_main_loop_run (_global_app->loop);
if (_global_app->a11y_bus_pid > 0)
kill (_global_app->a11y_bus_pid, SIGTERM);
- /* Clear the X property if our bus is gone; in the case where e.g.
+ /* Clear the X property if our bus is gone; in the case where e.g.
* 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)
XCloseDisplay (display);
}
}
+#endif
if (_global_app->a11y_launch_error_message)
{
projects / platform / upstream / at-spi2-core.git / blobdiff