Initialize keyboards from libinput

backend/CMakeLists.txt

@@ -15,6 +15,7 @@ add_library(wlr-backend
     drm/drm.c
 
     libinput/backend.c
+    libinput/events.c
 
     backend.c
     egl.c

backend/backend.c

@@ -19,14 +19,10 @@ struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
 	}
 	backend->state = state;
 	backend->impl = impl;
+	wl_signal_init(&backend->events.input_add);
+	wl_signal_init(&backend->events.input_remove);
 	wl_signal_init(&backend->events.output_add);
 	wl_signal_init(&backend->events.output_remove);
-	wl_signal_init(&backend->events.keyboard_add);
-	wl_signal_init(&backend->events.keyboard_remove);
-	wl_signal_init(&backend->events.pointer_add);
-	wl_signal_init(&backend->events.pointer_remove);
-	wl_signal_init(&backend->events.touch_add);
-	wl_signal_init(&backend->events.touch_remove);
 	return backend;
 }
 

backend/libinput/backend.c

@@ -23,7 +23,7 @@ static const struct libinput_interface libinput_impl = {
 	.close_restricted = wlr_libinput_close_restricted
 };
 
-static int wlr_libinput_handle_event(int fd, uint32_t mask, void *_state) {
+static int wlr_libinput_readable(int fd, uint32_t mask, void *_state) {
 	struct wlr_backend_state *state = _state;
 	if (libinput_dispatch(state->libinput) != 0) {
 		wlr_log(L_ERROR, "Failed to dispatch libinput");
@@ -32,12 +32,7 @@ static int wlr_libinput_handle_event(int fd, uint32_t mask, void *_state) {
 	}
 	struct libinput_event *event;
 	while ((event = libinput_get_event(state->libinput))) {
-		struct libinput *context = libinput_event_get_context(event);
-		struct libinput_device *device = libinput_event_get_device(event);
-		enum libinput_event_type event_type = libinput_event_get_type(event);
-		wlr_log(L_DEBUG, "libinput event: %d", event_type);
-		(void)device; (void)context;
-		// TODO: dispatch event
+		wlr_libinput_event(state, event);
 	}
 	return 0;
 }
@@ -73,7 +68,7 @@ static bool wlr_libinput_backend_init(struct wlr_backend_state *state) {
 	}
 	state->input_event = wl_event_loop_add_fd(event_loop,
 			libinput_get_fd(state->libinput), WL_EVENT_READABLE,
-			wlr_libinput_handle_event, state);
+			wlr_libinput_readable, state);
 	if (!state->input_event) {
 		wlr_log(L_ERROR, "Failed to create input event on event loop");
 		return false;
@@ -112,5 +107,7 @@ struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
 	state->udev = udev;
 	state->display = display;
 
+	state->keyboards = list_create();
+
 	return backend;
 }

backend/libinput/events.c

@@ -0,0 +1,100 @@
+#include <stdlib.h>
+#include <assert.h>
+#include <libinput.h>
+#include <wlr/session.h>
+#include <wlr/types.h>
+#include <wlr/common/list.h>
+#include "backend/libinput/backend.h"
+#include "common/log.h"
+#include "types.h"
+
+static void wlr_libinput_keyboard_destroy(struct wlr_keyboard_state *state) {
+	free(state);
+}
+
+static struct wlr_keyboard_impl keyboard_impl = {
+	.destroy = wlr_libinput_keyboard_destroy
+};
+
+static struct wlr_keyboard *wlr_libinput_keyboard_create(
+		struct libinput_device *device) {
+	assert(device);
+	struct wlr_keyboard_state *kbstate =
+		calloc(1, sizeof(struct wlr_keyboard_state));
+	kbstate->handle = device;
+	return wlr_keyboard_create(&keyboard_impl, kbstate);
+}
+
+static void device_added(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	assert(state && device);
+	/*
+	 * Note: the wlr API exposes only devices with a single capability, because
+	 * that meshes better with how Wayland does things and is a bit simpler.
+	 * However, libinput devices often have multiple capabilities - in such
+	 * cases we have to create several devices.
+	 */
+	int vendor = libinput_device_get_id_vendor(device);
+	int product = libinput_device_get_id_product(device);
+	const char *name = libinput_device_get_name(device);
+	list_t *devices = list_create();
+	wlr_log(L_DEBUG, "Added %s [%d:%d]", name, vendor, product);
+
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_KEYBOARD)) {
+		struct wlr_input_device *wlr_device = wlr_input_device_create(
+			WLR_INPUT_DEVICE_KEYBOARD, name, vendor, product);
+		wlr_device->keyboard = wlr_libinput_keyboard_create(device);
+		wl_signal_emit(&state->backend->events.input_add, wlr_device);
+		list_add(devices, wlr_device);
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_POINTER)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TOUCH)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_TOOL)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_TABLET_PAD)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_GESTURE)) {
+		// TODO
+	}
+	if (libinput_device_has_capability(device, LIBINPUT_DEVICE_CAP_SWITCH)) {
+		// TODO
+	}
+
+	if (devices->length > 0) {
+		libinput_device_set_user_data(device, devices);
+	} else {
+		list_free(devices);
+	}
+}
+
+static void device_removed(struct wlr_backend_state *state,
+		struct libinput_device *device) {
+	wlr_log(L_DEBUG, "libinput device removed");
+	// TODO
+}
+
+void wlr_libinput_event(struct wlr_backend_state *state,
+		struct libinput_event *event) {
+	assert(state && event);
+	struct libinput *context = libinput_event_get_context(event);
+	struct libinput_device *device = libinput_event_get_device(event);
+	enum libinput_event_type event_type = libinput_event_get_type(event);
+	(void)context;
+	switch (event_type) {
+	case LIBINPUT_EVENT_DEVICE_ADDED:
+		device_added(state, device);
+		break;
+	case LIBINPUT_EVENT_DEVICE_REMOVED:
+		device_removed(state, device);
+		break;
+	default:
+		wlr_log(L_DEBUG, "Unknown libinput event %d", event_type);
+		break;
+	}
+}