types/wlr_keyboard: add base wlr_input_device

wlr_keyboard owns its base wlr_input_device. It will be initialized when the
keyboard is initialized, and finished when the keyboard is destroyed.

backend/libinput/keyboard.c

@@ -49,7 +49,10 @@ struct wlr_keyboard *create_libinput_keyboard(
 	libinput_device_ref(libinput_dev);
 	libinput_device_led_update(libinput_dev, 0);
 	struct wlr_keyboard *wlr_kb = &kb->wlr_keyboard;
-	wlr_keyboard_init(wlr_kb, &impl);
+	const char *name = libinput_device_get_name(libinput_dev);
+	wlr_keyboard_init(wlr_kb, &impl, name);
+	wlr_kb->base.vendor = libinput_device_get_id_vendor(libinput_dev);
+	wlr_kb->base.product = libinput_device_get_id_product(libinput_dev);
 	return wlr_kb;
 }
 

backend/wayland/seat.c

@@ -785,14 +785,14 @@ void create_wl_keyboard(struct wlr_wl_seat *seat) {
 	}
 
 	struct wlr_input_device *wlr_dev = &dev->wlr_input_device;
-
 	wlr_dev->keyboard = calloc(1, sizeof(*wlr_dev->keyboard));
 	if (!wlr_dev->keyboard) {
 		wlr_log_errno(WLR_ERROR, "Allocation failed");
 		wlr_input_device_destroy(wlr_dev);
 		return;
 	}
-	wlr_keyboard_init(wlr_dev->keyboard, NULL);
+
+	wlr_keyboard_init(wlr_dev->keyboard, NULL, wlr_dev->name);
 
 	wl_keyboard_add_listener(wl_keyboard, &keyboard_listener, wlr_dev);
 	wlr_signal_emit_safe(&seat->backend->backend.events.new_input, wlr_dev);

backend/x11/backend.c

@@ -165,7 +165,7 @@ static bool backend_start(struct wlr_backend *backend) {
 
 	wlr_log(WLR_INFO, "Starting X11 backend");
 
-	wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->keyboard_dev);
+	wlr_signal_emit_safe(&x11->backend.events.new_input, &x11->keyboard.base);
 
 	for (size_t i = 0; i < x11->requested_outputs; ++i) {
 		wlr_x11_output_create(&x11->backend);
@@ -186,7 +186,7 @@ static void backend_destroy(struct wlr_backend *backend) {
 		wlr_output_destroy(&output->wlr_output);
 	}
 
-	wlr_input_device_destroy(&x11->keyboard_dev);
+	wlr_keyboard_destroy(&x11->keyboard);
 
 	wlr_backend_finish(backend);
 
@@ -638,10 +638,7 @@ struct wlr_backend *wlr_x11_backend_create(struct wl_display *display,
 	}
 #endif
 
-	wlr_input_device_init(&x11->keyboard_dev, WLR_INPUT_DEVICE_KEYBOARD,
-		&input_device_impl, "X11 keyboard");
-	wlr_keyboard_init(&x11->keyboard, &keyboard_impl);
-	x11->keyboard_dev.keyboard = &x11->keyboard;
+	wlr_keyboard_init(&x11->keyboard, &keyboard_impl, "x11-keyboard");
 
 	x11->display_destroy.notify = handle_display_destroy;
 	wl_display_add_destroy_listener(display, &x11->display_destroy);

backend/x11/input_device.c

@@ -336,5 +336,10 @@ void update_x11_pointer_position(struct wlr_x11_output *output,
 }
 
 bool wlr_input_device_is_x11(struct wlr_input_device *wlr_dev) {
-	return wlr_dev->impl == &input_device_impl;
+	switch (wlr_dev->type) {
+	case WLR_INPUT_DEVICE_KEYBOARD:
+		return wlr_dev->keyboard->impl == &keyboard_impl;
+	default:
+		return wlr_dev->impl == &input_device_impl;
+	}
 }

include/backend/x11.h

@@ -81,7 +81,6 @@ struct wlr_x11_backend {
 	struct wl_list outputs; // wlr_x11_output::link
 
 	struct wlr_keyboard keyboard;
-	struct wlr_input_device keyboard_dev;
 
 	int drm_fd;
 	struct wlr_drm_format_set dri3_formats;

include/wlr/interfaces/wlr_keyboard.h

@@ -18,7 +18,7 @@ struct wlr_keyboard_impl {
 };
 
 void wlr_keyboard_init(struct wlr_keyboard *keyboard,
-		const struct wlr_keyboard_impl *impl);
+		const struct wlr_keyboard_impl *impl, const char *name);
 void wlr_keyboard_destroy(struct wlr_keyboard *keyboard);
 void wlr_keyboard_notify_key(struct wlr_keyboard *keyboard,
 		struct wlr_event_keyboard_key *event);

include/wlr/types/wlr_keyboard.h

@@ -13,6 +13,7 @@
 #include <stdint.h>
 #include <wayland-server-core.h>
 #include <wayland-server-protocol.h>
+#include <wlr/types/wlr_input_device.h>
 #include <xkbcommon/xkbcommon.h>
 
 #define WLR_LED_COUNT 3
@@ -48,6 +49,8 @@ struct wlr_keyboard_modifiers {
 };
 
 struct wlr_keyboard {
+	struct wlr_input_device base;
+
 	const struct wlr_keyboard_impl *impl;
 	struct wlr_keyboard_group *group;
 

include/wlr/types/wlr_keyboard_group.h

@@ -11,11 +11,9 @@
 
 #include <wayland-server-core.h>
 #include <wlr/types/wlr_keyboard.h>
-#include <wlr/types/wlr_input_device.h>
 
 struct wlr_keyboard_group {
 	struct wlr_keyboard keyboard;
-	struct wlr_input_device *input_device;
 	struct wl_list devices; // keyboard_group_device::link
 	struct wl_list keys; // keyboard_group_key::link
 

include/wlr/types/wlr_virtual_keyboard_v1.h

@@ -26,7 +26,7 @@ struct wlr_virtual_keyboard_manager_v1 {
 };
 
 struct wlr_virtual_keyboard_v1 {
-	struct wlr_input_device input_device;
+	struct wlr_keyboard keyboard;
 	struct wl_resource *resource;
 	struct wlr_seat *seat;
 	bool has_keymap;

types/wlr_keyboard.c

@@ -4,6 +4,7 @@
 #include <sys/mman.h>
 #include <unistd.h>
 #include <wayland-server-core.h>
+#include <wlr/interfaces/wlr_input_device.h>
 #include <wlr/interfaces/wlr_keyboard.h>
 #include <wlr/types/wlr_keyboard.h>
 #include <wlr/util/log.h>
@@ -114,7 +115,10 @@ void wlr_keyboard_notify_key(struct wlr_keyboard *keyboard,
 }
 
 void wlr_keyboard_init(struct wlr_keyboard *kb,
-		const struct wlr_keyboard_impl *impl) {
+		const struct wlr_keyboard_impl *impl, const char *name) {
+	wlr_input_device_init(&kb->base, WLR_INPUT_DEVICE_KEYBOARD, NULL, name);
+	kb->base.keyboard = kb;
+
 	kb->impl = impl;
 	wl_signal_init(&kb->events.key);
 	wl_signal_init(&kb->events.modifiers);
@@ -134,6 +138,8 @@ void wlr_keyboard_destroy(struct wlr_keyboard *kb) {
 		return;
 	}
 	wlr_signal_emit_safe(&kb->events.destroy, kb);
+	wlr_input_device_finish(&kb->base);
+
 	xkb_state_unref(kb->xkb_state);
 	xkb_keymap_unref(kb->keymap);
 	free(kb->keymap_string);

types/wlr_keyboard_group.c

@@ -60,16 +60,7 @@ struct wlr_keyboard_group *wlr_keyboard_group_create(void) {
 		return NULL;
 	}
 
-	group->input_device = calloc(1, sizeof(struct wlr_input_device));
-	if (!group->input_device) {
-		wlr_log(WLR_ERROR, "Failed to allocate wlr_input_device for group");
-		free(group);
-		return NULL;
-	}
-	wl_signal_init(&group->input_device->events.destroy);
-	group->input_device->keyboard = &group->keyboard;
-
-	wlr_keyboard_init(&group->keyboard, &impl);
+	wlr_keyboard_init(&group->keyboard, &impl, "keyboard-group");
 	wl_list_init(&group->devices);
 	wl_list_init(&group->keys);
 
@@ -335,9 +326,7 @@ void wlr_keyboard_group_destroy(struct wlr_keyboard_group *group) {
 		wlr_keyboard_group_remove_keyboard(group, device->keyboard);
 	}
 	wlr_keyboard_destroy(&group->keyboard);
-	wl_list_remove(&group->input_device->events.destroy.listener_list);
 	wl_list_remove(&group->events.enter.listener_list);
 	wl_list_remove(&group->events.leave.listener_list);
-	free(group->input_device);
 	free(group);
 }

types/wlr_virtual_keyboard_v1.c

@@ -11,26 +11,40 @@
 #include "util/time.h"
 #include "virtual-keyboard-unstable-v1-protocol.h"
 
-
-static void keyboard_led_update(struct wlr_keyboard *wlr_kb, uint32_t leds) {
-	// unsupported by virtual keyboard protocol
+/**
+ * Send release event for each pressed key to bring the keyboard back to
+ * neutral state.
+ *
+ * This may be needed for virtual keyboards. For physical devices, kernel
+ * or libinput will deal with the removal of devices.
+ */
+static void keyboard_release_pressed_keys(struct wlr_keyboard *keyboard) {
+	size_t orig_num_keycodes = keyboard->num_keycodes;
+	for (size_t i = 0; i < orig_num_keycodes; ++i) {
+		assert(keyboard->num_keycodes == orig_num_keycodes - i);
+		struct wlr_event_keyboard_key event = {
+			.time_msec = get_current_time_msec(),
+			.keycode = keyboard->keycodes[orig_num_keycodes - i - 1],
+			.update_state = false,
+			.state = WL_KEYBOARD_KEY_STATE_RELEASED,
+		};
+		wlr_keyboard_notify_key(keyboard, &event);  // updates num_keycodes
+	}
 }
 
 static void keyboard_destroy(struct wlr_keyboard *wlr_kb) {
-	// safe to ignore - keyboard will be destroyed only iff associated virtual
-	// keyboard is torn down, no need to tear down the keyboard separately
+	struct wlr_virtual_keyboard_v1 *keyboard =
+		(struct wlr_virtual_keyboard_v1 *)wlr_kb;
+
+	keyboard_release_pressed_keys(&keyboard->keyboard);
+	wl_resource_set_user_data(keyboard->resource, NULL);
+	wlr_signal_emit_safe(&keyboard->events.destroy, keyboard);
+	wl_list_remove(&keyboard->link);
+	free(keyboard);
 }
 
 static const struct wlr_keyboard_impl keyboard_impl = {
 	.destroy = keyboard_destroy,
-	.led_update = keyboard_led_update
-};
-
-static void input_device_destroy(struct wlr_input_device *dev) {
-}
-
-static const struct wlr_input_device_impl input_device_impl = {
-	.destroy = input_device_destroy
 };
 
 static const struct zwp_virtual_keyboard_v1_interface virtual_keyboard_impl;
@@ -44,10 +58,11 @@ static struct wlr_virtual_keyboard_v1 *virtual_keyboard_from_resource(
 
 struct wlr_virtual_keyboard_v1 *wlr_input_device_get_virtual_keyboard(
 		struct wlr_input_device *wlr_dev) {
-	if (wlr_dev->impl != &input_device_impl) {
+	if (wlr_dev->type != WLR_INPUT_DEVICE_KEYBOARD
+			|| wlr_dev->keyboard->impl != &keyboard_impl) {
 		return NULL;
 	}
-	return (struct wlr_virtual_keyboard_v1 *)wlr_dev;
+	return (struct wlr_virtual_keyboard_v1 *)wlr_dev->keyboard;
 }
 
 static void virtual_keyboard_keymap(struct wl_client *client,
@@ -70,7 +85,7 @@ static void virtual_keyboard_keymap(struct wl_client *client,
 	if (!keymap) {
 		goto keymap_fail;
 	}
-	wlr_keyboard_set_keymap(keyboard->input_device.keyboard, keymap);
+	wlr_keyboard_set_keymap(&keyboard->keyboard, keymap);
 	keyboard->has_keymap = true;
 	xkb_keymap_unref(keymap);
 	xkb_context_unref(context);
@@ -101,7 +116,7 @@ static void virtual_keyboard_key(struct wl_client *client,
 		.update_state = false,
 		.state = state,
 	};
-	wlr_keyboard_notify_key(keyboard->input_device.keyboard, &event);
+	wlr_keyboard_notify_key(&keyboard->keyboard, &event);
 }
 
 static void virtual_keyboard_modifiers(struct wl_client *client,
@@ -115,39 +130,16 @@ static void virtual_keyboard_modifiers(struct wl_client *client,
 			"Cannot send a modifier state before defining a keymap");
 		return;
 	}
-	wlr_keyboard_notify_modifiers(keyboard->input_device.keyboard,
+	wlr_keyboard_notify_modifiers(&keyboard->keyboard,
 		mods_depressed, mods_latched, mods_locked, group);
 }
 
-/**
- * Send release event for each pressed key to bring the keyboard back to
- * neutral state.
- *
- * This may be needed for virtual keyboards. For physical devices, kernel
- * or libinput will deal with the removal of devices.
- */
-static void keyboard_release_pressed_keys(struct wlr_keyboard *keyboard) {
-	size_t orig_num_keycodes = keyboard->num_keycodes;
-	for (size_t i = 0; i < orig_num_keycodes; ++i) {
-		assert(keyboard->num_keycodes == orig_num_keycodes - i);
-		struct wlr_event_keyboard_key event = {
-			.time_msec = get_current_time_msec(),
-			.keycode = keyboard->keycodes[orig_num_keycodes - i - 1],
-			.update_state = false,
-			.state = WL_KEYBOARD_KEY_STATE_RELEASED,
-		};
-		wlr_keyboard_notify_key(keyboard, &event);  // updates num_keycodes
-	}
-}
-
 static void virtual_keyboard_destroy_resource(struct wl_resource *resource) {
 	struct wlr_virtual_keyboard_v1 *keyboard =
 		virtual_keyboard_from_resource(resource);
-	keyboard_release_pressed_keys(keyboard->input_device.keyboard);
-	wlr_signal_emit_safe(&keyboard->events.destroy, keyboard);
-	wl_list_remove(&keyboard->link);
-	wlr_input_device_destroy(&keyboard->input_device);
-	free(keyboard);
+	if (keyboard != NULL) {
+		wlr_keyboard_destroy(&keyboard->keyboard);
+	}
 }
 
 static void virtual_keyboard_destroy(struct wl_client *client,
@@ -184,20 +176,13 @@ static void virtual_keyboard_manager_create_virtual_keyboard(
 		return;
 	}
 
-	struct wlr_keyboard* keyboard = calloc(1, sizeof(struct wlr_keyboard));
-	if (!keyboard) {
-		wlr_log(WLR_ERROR, "Cannot allocate wlr_keyboard");
-		free(virtual_keyboard);
-		wl_client_post_no_memory(client);
-		return;
-	}
-	wlr_keyboard_init(keyboard, &keyboard_impl);
+	wlr_keyboard_init(&virtual_keyboard->keyboard, &keyboard_impl,
+		"virtual-keyboard");
 
 	struct wl_resource *keyboard_resource = wl_resource_create(client,
 		&zwp_virtual_keyboard_v1_interface, wl_resource_get_version(resource),
 		id);
 	if (!keyboard_resource) {
-		free(keyboard);
 		free(virtual_keyboard);
 		wl_client_post_no_memory(client);
 		return;
@@ -206,12 +191,8 @@ static void virtual_keyboard_manager_create_virtual_keyboard(
 	wl_resource_set_implementation(keyboard_resource, &virtual_keyboard_impl,
 		virtual_keyboard, virtual_keyboard_destroy_resource);
 
-	wlr_input_device_init(&virtual_keyboard->input_device,
-		WLR_INPUT_DEVICE_KEYBOARD, &input_device_impl, "virtual keyboard");
-
 	struct wlr_seat_client *seat_client = wlr_seat_client_from_resource(seat);
 
-	virtual_keyboard->input_device.keyboard = keyboard;
 	virtual_keyboard->resource = keyboard_resource;
 	virtual_keyboard->seat = seat_client->seat;
 	wl_signal_init(&virtual_keyboard->events.destroy);