x11 backend: add wlr_input_device_is_x11

backend/x11/backend.c

@@ -25,6 +25,7 @@
 
 static struct wlr_backend_impl backend_impl;
 static struct wlr_output_impl output_impl;
+static struct wlr_input_device_impl input_device_impl = { 0 };
 
 static uint32_t xcb_button_to_wl(uint32_t button) {
 	switch (button) {
@@ -328,12 +329,12 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
 	}
 
 	wlr_input_device_init(&x11->keyboard_dev, WLR_INPUT_DEVICE_KEYBOARD,
-		NULL, "X11 keyboard", 0, 0);
+		&input_device_impl, "X11 keyboard", 0, 0);
 	wlr_keyboard_init(&x11->keyboard, NULL);
 	x11->keyboard_dev.keyboard = &x11->keyboard;
 
 	wlr_input_device_init(&x11->pointer_dev, WLR_INPUT_DEVICE_POINTER,
-		NULL, "X11 pointer", 0, 0);
+		&input_device_impl, "X11 pointer", 0, 0);
 	wlr_pointer_init(&x11->pointer, NULL);
 	x11->pointer_dev.pointer = &x11->pointer;
 
@@ -405,3 +406,7 @@ static struct wlr_output_impl output_impl = {
 bool wlr_output_is_x11(struct wlr_output *wlr_output) {
 	return wlr_output->impl == &output_impl;
 }
+
+bool wlr_input_device_is_x11(struct wlr_input_device *wlr_dev) {
+	return wlr_dev->impl == &input_device_impl;
+}

include/backend/x11.h

@@ -6,7 +6,6 @@
 #include <X11/Xlib-xcb.h>
 #include <wayland-server.h>
 #include <wlr/render/egl.h>
-#include <wlr/types/wlr_input_device.h>
 
 struct wlr_x11_backend;
 

include/wlr/backend/x11.h

@@ -4,12 +4,14 @@
 #include <stdbool.h>
 #include <wayland-server.h>
 #include <wlr/backend.h>
+#include <wlr/types/wlr_input_device.h>
 #include <wlr/types/wlr_output.h>
 
 struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
 	const char *x11_display);
 
 bool wlr_backend_is_x11(struct wlr_backend *backend);
+bool wlr_input_device_is_x11(struct wlr_input_device *device);
 bool wlr_output_is_x11(struct wlr_output *output);
 
 #endif