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#include <assert.h>
#include <stdlib.h>
#include <wlr/types/wlr_compositor.h>
#include <wlr/xwayland/shell.h>
#include "xwayland-shell-v1-protocol.h"
#define SHELL_VERSION 1
static void destroy_resource(struct wl_client *client,
struct wl_resource *resource) {
wl_resource_destroy(resource);
}
static const struct xwayland_shell_v1_interface shell_impl;
static const struct xwayland_surface_v1_interface xwl_surface_impl;
/**
* Get a struct wlr_xwayland_shell_v1 from a resource.
*/
static struct wlr_xwayland_shell_v1 *shell_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource,
&xwayland_shell_v1_interface, &shell_impl));
return wl_resource_get_user_data(resource);
}
/**
* Get a struct wlr_xwayland_surface_v1 from a resource.
*
* Returns NULL if the Xwayland surface is inert.
*/
static struct wlr_xwayland_surface_v1 *xwl_surface_from_resource(
struct wl_resource *resource) {
assert(wl_resource_instance_of(resource,
&xwayland_surface_v1_interface, &xwl_surface_impl));
return wl_resource_get_user_data(resource);
}
static void xwl_surface_role_commit(struct wlr_surface *surface) {
struct wlr_xwayland_surface_v1 *xwl_surface = xwl_surface_from_resource(surface->role_resource);
if (xwl_surface->serial != 0 && !xwl_surface->added) {
xwl_surface->added = true;
wl_signal_emit_mutable(&xwl_surface->shell->events.new_surface,
xwl_surface);
}
}
static void xwl_surface_role_destroy(struct wlr_surface *surface) {
struct wlr_xwayland_surface_v1 *xwl_surface = xwl_surface_from_resource(surface->role_resource);
wl_list_remove(&xwl_surface->surface_destroy.link);
wl_list_remove(&xwl_surface->link);
wl_resource_set_user_data(xwl_surface->resource, NULL); // make inert
free(xwl_surface);
}
static const struct wlr_surface_role xwl_surface_role = {
.name = "xwayland_surface_v1",
.commit = xwl_surface_role_commit,
.destroy = xwl_surface_role_destroy,
};
static void xwl_surface_handle_set_serial(struct wl_client *client,
struct wl_resource *resource, uint32_t serial_lo, uint32_t serial_hi) {
struct wlr_xwayland_surface_v1 *xwl_surface =
xwl_surface_from_resource(resource);
if (xwl_surface == NULL) {
return;
}
if (xwl_surface->serial != 0) {
wl_resource_post_error(resource,
XWAYLAND_SURFACE_V1_ERROR_ALREADY_ASSOCIATED,
"xwayland_surface_v1 is already associated with another X11 serial");
return;
}
xwl_surface->serial = ((uint64_t)serial_hi << 32) | serial_lo;
}
static const struct xwayland_surface_v1_interface xwl_surface_impl = {
.destroy = destroy_resource,
.set_serial = xwl_surface_handle_set_serial,
};
static void xwl_surface_handle_surface_destroy(struct wl_listener *listener,
void *data) {
struct wlr_xwayland_surface_v1 *xwl_surface =
wl_container_of(listener, xwl_surface, surface_destroy);
wlr_surface_destroy_role_object(xwl_surface->surface);
}
static void shell_handle_get_xwayland_surface(struct wl_client *client,
struct wl_resource *shell_resource, uint32_t id,
struct wl_resource *surface_resource) {
struct wlr_xwayland_shell_v1 *shell = shell_from_resource(shell_resource);
struct wlr_surface *surface = wlr_surface_from_resource(surface_resource);
struct wlr_xwayland_surface_v1 *xwl_surface = calloc(1, sizeof(*xwl_surface));
if (xwl_surface == NULL) {
wl_client_post_no_memory(client);
return;
}
if (!wlr_surface_set_role(surface, &xwl_surface_role,
shell_resource, XWAYLAND_SHELL_V1_ERROR_ROLE)) {
free(xwl_surface);
return;
}
xwl_surface->surface = surface;
xwl_surface->shell = shell;
uint32_t version = wl_resource_get_version(shell_resource);
xwl_surface->resource = wl_resource_create(client,
&xwayland_surface_v1_interface, version, id);
if (xwl_surface->resource == NULL) {
free(xwl_surface);
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(xwl_surface->resource, &xwl_surface_impl,
xwl_surface, NULL);
wlr_surface_set_role_object(surface, xwl_surface->resource);
wl_list_insert(&shell->surfaces, &xwl_surface->link);
xwl_surface->surface_destroy.notify = xwl_surface_handle_surface_destroy;
wl_signal_add(&surface->events.destroy, &xwl_surface->surface_destroy);
}
static const struct xwayland_shell_v1_interface shell_impl = {
.destroy = destroy_resource,
.get_xwayland_surface = shell_handle_get_xwayland_surface,
};
static void shell_bind(struct wl_client *client, void *data, uint32_t version,
uint32_t id) {
struct wlr_xwayland_shell_v1 *shell = data;
if (client != shell->client) {
wl_client_post_implementation_error(client,
"Permission denied to bind to %s", xwayland_shell_v1_interface.name);
return;
}
struct wl_resource *resource = wl_resource_create(client,
&xwayland_shell_v1_interface, version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &shell_impl, shell, NULL);
}
static void handle_display_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland_shell_v1 *shell =
wl_container_of(listener, shell, display_destroy);
wlr_xwayland_shell_v1_destroy(shell);
}
struct wlr_xwayland_shell_v1 *wlr_xwayland_shell_v1_create(
struct wl_display *display, uint32_t version) {
assert(version <= SHELL_VERSION);
struct wlr_xwayland_shell_v1 *shell = calloc(1, sizeof(*shell));
if (shell == NULL) {
return NULL;
}
shell->global = wl_global_create(display, &xwayland_shell_v1_interface,
version, shell, shell_bind);
if (shell->global == NULL) {
free(shell);
return NULL;
}
wl_list_init(&shell->surfaces);
wl_signal_init(&shell->events.new_surface);
shell->display_destroy.notify = handle_display_destroy;
wl_display_add_destroy_listener(display, &shell->display_destroy);
wl_list_init(&shell->client_destroy.link);
return shell;
}
void wlr_xwayland_shell_v1_destroy(struct wlr_xwayland_shell_v1 *shell) {
if (shell == NULL) {
return;
}
struct wlr_xwayland_surface_v1 *xwl_surface, *tmp;
wl_list_for_each_safe(xwl_surface, tmp, &shell->surfaces, link) {
wlr_surface_destroy_role_object(xwl_surface->surface);
}
wl_list_remove(&shell->display_destroy.link);
wl_list_remove(&shell->client_destroy.link);
wl_global_destroy(shell->global);
free(shell);
}
static void shell_handle_client_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwayland_shell_v1 *shell =
wl_container_of(listener, shell, client_destroy);
wlr_xwayland_shell_v1_set_client(shell, NULL);
}
void wlr_xwayland_shell_v1_set_client(struct wlr_xwayland_shell_v1 *shell,
struct wl_client *client) {
wl_list_remove(&shell->client_destroy.link);
shell->client = client;
if (client != NULL) {
shell->client_destroy.notify = shell_handle_client_destroy;
wl_client_add_destroy_listener(client, &shell->client_destroy);
} else {
wl_list_init(&shell->client_destroy.link);
}
}
struct wlr_surface *wlr_xwayland_shell_v1_surface_from_serial(
struct wlr_xwayland_shell_v1 *shell, uint64_t serial) {
struct wlr_xwayland_surface_v1 *xwl_surface;
wl_list_for_each(xwl_surface, &shell->surfaces, link) {
if (xwl_surface->serial == serial) {
return xwl_surface->surface;
}
}
return NULL;
}
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