initial commit, 4.5 stable

platform/linuxbsd/freedesktop_at_spi_monitor.cpp

@@ -0,0 +1,177 @@
+/**************************************************************************/
+/*  freedesktop_at_spi_monitor.cpp                                        */
+/**************************************************************************/
+/*                         This file is part of:                          */
+/*                             GODOT ENGINE                               */
+/*                        https://godotengine.org                         */
+/**************************************************************************/
+/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
+/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
+/*                                                                        */
+/* Permission is hereby granted, free of charge, to any person obtaining  */
+/* a copy of this software and associated documentation files (the        */
+/* "Software"), to deal in the Software without restriction, including    */
+/* without limitation the rights to use, copy, modify, merge, publish,    */
+/* distribute, sublicense, and/or sell copies of the Software, and to     */
+/* permit persons to whom the Software is furnished to do so, subject to  */
+/* the following conditions:                                              */
+/*                                                                        */
+/* The above copyright notice and this permission notice shall be         */
+/* included in all copies or substantial portions of the Software.        */
+/*                                                                        */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,        */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF     */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY   */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,   */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE      */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                 */
+/**************************************************************************/
+
+#include "freedesktop_at_spi_monitor.h"
+
+#ifdef DBUS_ENABLED
+
+#include "core/os/os.h"
+
+#ifdef SOWRAP_ENABLED
+#include "dbus-so_wrap.h"
+#else
+#include <dbus/dbus.h>
+#endif
+
+#include <unistd.h>
+
+#define BUS_OBJECT_NAME "org.a11y.Bus"
+#define BUS_OBJECT_PATH "/org/a11y/bus"
+
+#define BUS_INTERFACE_PROPERTIES "org.freedesktop.DBus.Properties"
+
+void FreeDesktopAtSPIMonitor::monitor_thread_func(void *p_userdata) {
+	FreeDesktopAtSPIMonitor *mon = (FreeDesktopAtSPIMonitor *)p_userdata;
+
+	DBusError error;
+	dbus_error_init(&error);
+
+	DBusConnection *bus = dbus_bus_get(DBUS_BUS_SESSION, &error);
+	if (dbus_error_is_set(&error)) {
+		dbus_error_free(&error);
+		mon->supported.clear();
+		return;
+	}
+
+	static const char *iface = "org.a11y.Status";
+	static const char *member_ac = "IsEnabled";
+	static const char *member_sr = "ScreenReaderEnabled";
+
+	while (!mon->exit_thread.is_set()) {
+		DBusMessage *message = dbus_message_new_method_call(BUS_OBJECT_NAME, BUS_OBJECT_PATH, BUS_INTERFACE_PROPERTIES, "Get");
+
+		dbus_message_append_args(
+				message,
+				DBUS_TYPE_STRING, &iface,
+				DBUS_TYPE_STRING, &member_ac,
+				DBUS_TYPE_INVALID);
+
+		DBusMessage *reply = dbus_connection_send_with_reply_and_block(bus, message, 50, &error);
+		dbus_message_unref(message);
+
+		if (!dbus_error_is_set(&error)) {
+			DBusMessageIter iter, iter_variant, iter_struct;
+			dbus_bool_t result;
+			dbus_message_iter_init(reply, &iter);
+			dbus_message_iter_recurse(&iter, &iter_variant);
+			switch (dbus_message_iter_get_arg_type(&iter_variant)) {
+				case DBUS_TYPE_STRUCT: {
+					dbus_message_iter_recurse(&iter_variant, &iter_struct);
+					if (dbus_message_iter_get_arg_type(&iter_struct) == DBUS_TYPE_BOOLEAN) {
+						dbus_message_iter_get_basic(&iter_struct, &result);
+						if (result) {
+							mon->ac_enabled.set();
+						} else {
+							mon->ac_enabled.clear();
+						}
+					}
+				} break;
+				case DBUS_TYPE_BOOLEAN: {
+					dbus_message_iter_get_basic(&iter_variant, &result);
+					if (result) {
+						mon->ac_enabled.set();
+					} else {
+						mon->ac_enabled.clear();
+					}
+				} break;
+				default:
+					break;
+			}
+			dbus_message_unref(reply);
+		} else {
+			dbus_error_free(&error);
+		}
+
+		message = dbus_message_new_method_call(BUS_OBJECT_NAME, BUS_OBJECT_PATH, BUS_INTERFACE_PROPERTIES, "Get");
+
+		dbus_message_append_args(
+				message,
+				DBUS_TYPE_STRING, &iface,
+				DBUS_TYPE_STRING, &member_sr,
+				DBUS_TYPE_INVALID);
+
+		reply = dbus_connection_send_with_reply_and_block(bus, message, 50, &error);
+		dbus_message_unref(message);
+
+		if (!dbus_error_is_set(&error)) {
+			DBusMessageIter iter, iter_variant, iter_struct;
+			dbus_bool_t result;
+			dbus_message_iter_init(reply, &iter);
+			dbus_message_iter_recurse(&iter, &iter_variant);
+			switch (dbus_message_iter_get_arg_type(&iter_variant)) {
+				case DBUS_TYPE_STRUCT: {
+					dbus_message_iter_recurse(&iter_variant, &iter_struct);
+					if (dbus_message_iter_get_arg_type(&iter_struct) == DBUS_TYPE_BOOLEAN) {
+						dbus_message_iter_get_basic(&iter_struct, &result);
+						if (result) {
+							mon->sr_enabled.set();
+						} else {
+							mon->sr_enabled.clear();
+						}
+					}
+				} break;
+				case DBUS_TYPE_BOOLEAN: {
+					dbus_message_iter_get_basic(&iter_variant, &result);
+					if (result) {
+						mon->sr_enabled.set();
+					} else {
+						mon->sr_enabled.clear();
+					}
+				} break;
+				default:
+					break;
+			}
+			dbus_message_unref(reply);
+		} else {
+			dbus_error_free(&error);
+		}
+
+		usleep(50000);
+	}
+
+	dbus_connection_unref(bus);
+}
+
+FreeDesktopAtSPIMonitor::FreeDesktopAtSPIMonitor() {
+	supported.set();
+	sr_enabled.clear();
+	exit_thread.clear();
+
+	thread.start(FreeDesktopAtSPIMonitor::monitor_thread_func, this);
+}
+
+FreeDesktopAtSPIMonitor::~FreeDesktopAtSPIMonitor() {
+	exit_thread.set();
+	if (thread.is_started()) {
+		thread.wait_to_finish();
+	}
+}
+
+#endif // DBUS_ENABLED