1 files changed, 136 insertions, 0 deletions
diff --git a/libdecor/src/cursor-settings.c b/libdecor/src/cursor-settings.c
new file mode 100644
index 000000000..b94623fd6
--- /dev/null
+++ b/libdecor/src/cursor-settings.c
@@ -0,0 +1,136 @@
+#include "cursor-settings.h"
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include "config.h"
+
+#ifdef HAS_DBUS
+#include <dbus/dbus.h>
+
+static DBusMessage *
+get_setting_sync(DBusConnection *const connection,
+		 const char *key,
+		 const char *value)
+{
+	DBusError error;
+	dbus_bool_t success;
+	DBusMessage *message;
+	DBusMessage *reply;
+
+	dbus_error_init(&error);
+
+	message = dbus_message_new_method_call(
+		"org.freedesktop.portal.Desktop",
+		"/org/freedesktop/portal/desktop",
+		"org.freedesktop.portal.Settings",
+		"Read");
+
+	success = dbus_message_append_args(message,
+		DBUS_TYPE_STRING, &key,
+		DBUS_TYPE_STRING, &value,
+		DBUS_TYPE_INVALID);
+
+	if (!success)
+		return NULL;
+
+	reply = dbus_connection_send_with_reply_and_block(
+			     connection,
+			     message,
+			     DBUS_TIMEOUT_USE_DEFAULT,
+			     &error);
+
+	dbus_message_unref(message);
+
+	if (dbus_error_is_set(&error))
+		return NULL;
+
+	return reply;
+}
+
+static bool
+parse_type(DBusMessage *const reply,
+	   const int type,
+	   void *value)
+{
+	DBusMessageIter iter[3];
+
+	dbus_message_iter_init(reply, &iter[0]);
+	if (dbus_message_iter_get_arg_type(&iter[0]) != DBUS_TYPE_VARIANT)
+		return false;
+
+	dbus_message_iter_recurse(&iter[0], &iter[1]);
+	if (dbus_message_iter_get_arg_type(&iter[1]) != DBUS_TYPE_VARIANT)
+		return false;
+
+	dbus_message_iter_recurse(&iter[1], &iter[2]);
+	if (dbus_message_iter_get_arg_type(&iter[2]) != type)
+		return false;
+
+	dbus_message_iter_get_basic(&iter[2], value);
+
+	return true;
+}
+
+bool
+libdecor_get_cursor_settings(char **theme, int *size)
+{
+	static const char name[] = "org.gnome.desktop.interface";
+	static const char key_theme[] = "cursor-theme";
+	static const char key_size[] = "cursor-size";
+
+	DBusError error;
+	DBusConnection *connection;
+	DBusMessage *reply;
+	const char *value_theme = NULL;
+
+	dbus_error_init(&error);
+
+	connection = dbus_bus_get(DBUS_BUS_SESSION, &error);
+
+	if (dbus_error_is_set(&error))
+		return false;
+
+	reply = get_setting_sync(connection, name, key_theme);
+	if (!reply)
+		return false;
+
+	if (!parse_type(reply, DBUS_TYPE_STRING, &value_theme)) {
+		dbus_message_unref(reply);
+		return false;
+	}
+
+	*theme = strdup(value_theme);
+
+	dbus_message_unref(reply);
+
+	reply = get_setting_sync(connection, name, key_size);
+	if (!reply)
+		return false;
+
+	if (!parse_type(reply, DBUS_TYPE_INT32, size)) {
+		dbus_message_unref(reply);
+		return false;
+	}
+
+	dbus_message_unref(reply);
+
+	return true;
+}
+#else
+bool
+libdecor_get_cursor_settings(char **theme, int *size)
+{
+	char *env_xtheme;
+	char *env_xsize;
+
+	env_xtheme = getenv("XCURSOR_THEME");
+	if (env_xtheme != NULL)
+		*theme = strdup(env_xtheme);
+
+	env_xsize = getenv("XCURSOR_SIZE");
+	if (env_xsize != NULL)
+		*size = atoi(env_xsize);
+
+	return env_xtheme != NULL && env_xsize != NULL;
+}
+#endif