Initial pass on wlr_seat

include/wlr/types/wlr_seat.h

@@ -0,0 +1,59 @@
+#ifndef _WLR_TYPES_SEAT_H
+#define _WLR_TYPES_SEAT_H
+#include <wayland-server.h>
+
+/**
+ * Contains state for a single client's bound wl_seat resource and can be used
+ * to issue input events to that client. The lifetime of these objects is
+ * managed by wlr_seat; some may be NULL.
+ */
+struct wlr_seat_handle {
+	struct wl_resource *wl_resource;
+	struct wlr_seat *wlr_seat;
+
+	struct wl_resource *pointer;
+	struct wl_resource *keyboard;
+	struct wl_resource *touch;
+
+	struct wl_list link;
+};
+
+struct wlr_seat {
+	struct wl_global *wl_global;
+	struct wl_list handles;
+	char *name;
+	uint32_t capabilities;
+
+	struct {
+		struct wl_signal client_bound;
+		struct wl_signal client_unbound;
+	} events;
+
+	void *data;
+};
+
+
+/**
+ * Allocates a new wlr_seat and adds a wl_seat global to the display.
+ */
+struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name);
+/**
+ * Destroys a wlr_seat and removes its wl_seat global.
+ */
+void wlr_seat_destroy(struct wlr_seat *wlr_seat);
+/**
+ * Gets a wlr_seat_handle for the specified client, or returns NULL if no
+ * handle is bound for that client.
+ */
+struct wlr_seat_handle *wlr_seat_handle_for_client(struct wlr_seat *wlr_seat,
+		struct wl_client *client);
+/**
+ * Updates the capabilities available on this seat.
+ */
+void wlr_seat_set_capabilities(struct wlr_seat *wlr_seat, uint32_t capabilities);
+/**
+ * Updates the name of this seat.
+ */
+void wlr_seat_set_name(struct wlr_seat *wlr_seat, const char *name);
+
+#endif

types/meson.build

@@ -4,6 +4,7 @@ lib_wlr_types = static_library('wlr_types', files(
     'wlr_output.c',
     'wlr_pointer.c',
     'wlr_region.c',
+    'wlr_seat.c',
     'wlr_surface.c',
     'wlr_tablet_pad.c',
     'wlr_tablet_tool.c',

types/wlr_seat.c

@@ -0,0 +1,156 @@
+#define _POSIX_C_SOURCE 200809L
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <wayland-server.h>
+#include <wlr/types/wlr_seat.h>
+#include <wlr/util/log.h>
+
+static void wl_pointer_set_cursor(struct wl_client *client,
+			   struct wl_resource *resource,
+			   uint32_t serial,
+			   struct wl_resource *surface,
+			   int32_t hotspot_x,
+			   int32_t hotspot_y) {
+	wlr_log(L_DEBUG, "TODO: wl_pointer_set_cursor");
+}
+
+static void wl_pointer_destroy(struct wl_resource *resource) {
+	struct wlr_seat_handle *handle = wl_resource_get_user_data(resource);
+	if (handle->pointer) {
+		wl_resource_destroy(handle->pointer);
+		handle->pointer = NULL;
+	}
+}
+
+static void wl_pointer_release(struct wl_client *client,
+		struct wl_resource *resource) {
+	wl_pointer_destroy(resource);
+}
+
+struct wl_pointer_interface wl_pointer_impl = {
+	.set_cursor = wl_pointer_set_cursor,
+	.release = wl_pointer_release
+};
+
+static void wl_seat_get_pointer(struct wl_client *client,
+		struct wl_resource *_handle, uint32_t id) {
+	struct wlr_seat_handle *handle = wl_resource_get_user_data(_handle);
+	if (!(handle->wlr_seat->capabilities & WL_SEAT_CAPABILITY_KEYBOARD)) {
+		// TODO: Show error?
+		return;
+	}
+	if (handle->pointer) {
+		// TODO: this is probably a protocol violation but it simplifies our
+		// code and it'd be stupid for clients to create several pointers for
+		// the same seat
+		wl_resource_destroy(handle->pointer);
+	}
+	handle->pointer = wl_resource_create(client, &wl_pointer_interface, 5, id);
+	wl_resource_set_implementation(handle->pointer, &wl_pointer_impl,
+			handle, NULL);
+}
+
+static void wl_seat_get_keyboard(struct wl_client *client,
+		struct wl_resource *_handle, uint32_t id) {
+	wlr_log(L_DEBUG, "TODO: wl_seat_get_keyboard");
+}
+
+static void wl_seat_get_touch(struct wl_client *client,
+		struct wl_resource *_handle, uint32_t id) {
+	wlr_log(L_DEBUG, "TODO: wl_seat_get_touch");
+}
+
+static void wl_seat_destroy(struct wl_resource *resource) {
+	struct wlr_seat_handle *handle = wl_resource_get_user_data(resource);
+	if (handle->pointer) {
+		wl_resource_destroy(handle->pointer);
+	}
+	if (handle->keyboard) {
+		wl_resource_destroy(handle->pointer);
+	}
+	if (handle->touch) {
+		wl_resource_destroy(handle->pointer);
+	}
+	wl_signal_emit(&handle->wlr_seat->events.client_unbound, handle);
+	wl_list_remove(&handle->link);
+	free(handle);
+}
+
+static void wl_seat_release(struct wl_client *client,
+		struct wl_resource *resource) {
+	wl_seat_destroy(resource);
+}
+
+struct wl_seat_interface wl_seat_impl = {
+	.get_pointer = wl_seat_get_pointer,
+	.get_keyboard = wl_seat_get_keyboard,
+	.get_touch = wl_seat_get_touch,
+	.release = wl_seat_release
+};
+
+static void wl_seat_bind(struct wl_client *wl_client, void *_wlr_seat,
+		uint32_t version, uint32_t id) {
+	struct wlr_seat *wlr_seat = _wlr_seat;
+	assert(wl_client && wlr_seat);
+	if (version > 5) {
+		wlr_log(L_ERROR, "Client requested unsupported wl_seat version, disconnecting");
+		wl_client_destroy(wl_client);
+		return;
+	}
+	struct wlr_seat_handle *handle = calloc(1, sizeof(struct wlr_seat_handle));
+	handle->wl_resource = wl_resource_create(
+			wl_client, &wl_seat_interface, version, id);
+	handle->wlr_seat = wlr_seat;
+	wl_resource_set_implementation(handle->wl_resource, &wl_seat_impl,
+			handle, wl_seat_destroy);
+	wl_list_insert(&wlr_seat->handles, &handle->link);
+	wl_seat_send_capabilities(handle->wl_resource, wlr_seat->capabilities);
+	wl_signal_emit(&wlr_seat->events.client_bound, handle);
+}
+
+struct wlr_seat *wlr_seat_create(struct wl_display *display, const char *name) {
+	struct wlr_seat *wlr_seat = calloc(1, sizeof(struct wlr_seat));
+	if (!wlr_seat) {
+		return NULL;
+	}
+	struct wl_global *wl_global = wl_global_create(display,
+		&wl_seat_interface, 5, wlr_seat, wl_seat_bind);
+	if (!wl_global) {
+		free(wlr_seat);
+		return NULL;
+	}
+	wlr_seat->wl_global = wl_global;
+	wlr_seat->name = strdup(name);
+	wl_list_init(&wlr_seat->handles);
+	wl_signal_init(&wlr_seat->events.client_bound);
+	wl_signal_init(&wlr_seat->events.client_unbound);
+	return wlr_seat;
+}
+
+void wlr_seat_destroy(struct wlr_seat *wlr_seat) {
+	// TODO
+}
+
+struct wlr_seat_handle *wlr_seat_handle_for_client(struct wlr_seat *wlr_seat,
+		struct wl_client *client) {
+	assert(wlr_seat);
+	struct wlr_seat_handle *handle;
+	wl_list_for_each(handle, &wlr_seat->handles, link) {
+		if (wl_resource_get_client(handle->wl_resource) == client) {
+			return handle;
+		}
+	}
+	return NULL;
+}
+
+void wlr_seat_set_capabilities(struct wlr_seat *wlr_seat,
+		uint32_t capabilities) {
+	// TODO: If e.g. pointer was removed, destroy all client pointer resources
+	wlr_seat->capabilities = capabilities;
+}
+
+void wlr_seat_set_name(struct wlr_seat *wlr_seat, const char *name) {
+	free(wlr_seat->name);
+	wlr_seat->name = strdup(name);
+}