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seat: Create inert objects for missing capabilities

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We should throw a protocol error if the relevant capability has never
existed when get_(pointer|keyboard|touch) is called. Otherwise, it
should succeed, even if the capability is not currently present.

This follows the spec, and avoids possible races with the client when
capabilities are lost.

Closes: https://github.com/swaywm/wlroots/issues/2227
This commit is contained in:
Kenny Levinsen 2020-05-28 00:24:50 +02:00 • committed by Simon Ser
parent d66b9966e9
commit 5e0ef70cc0
5 changed files with 25 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

1
include/wlr/types/wlr_seat.h
View file

@ -214,6 +214,7 @@ struct wlr_seat {
char *name; char *name;
uint32_t capabilities; uint32_t capabilities;
uint32_t accumulated_capabilities;
struct timespec last_event; struct timespec last_event;
struct wlr_data_source *selection_source; struct wlr_data_source *selection_source;

19
types/seat/wlr_seat.c
View file

@ -19,9 +19,9 @@ static void seat_handle_get_pointer(struct wl_client *client,
struct wl_resource *seat_resource, uint32_t id) { struct wl_resource *seat_resource, uint32_t id) {
struct wlr_seat_client *seat_client = struct wlr_seat_client *seat_client =
wlr_seat_client_from_resource(seat_resource); wlr_seat_client_from_resource(seat_resource);
if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_POINTER)) { if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_POINTER)) {
wlr_log(WLR_ERROR, "Client sent get_pointer on seat without the " wl_resource_post_error(seat_resource, 0,
"pointer capability"); "wl_seat.get_pointer called when no pointer capability has existed");
return; return;
} }
@ -33,9 +33,9 @@ static void seat_handle_get_keyboard(struct wl_client *client,
struct wl_resource *seat_resource, uint32_t id) { struct wl_resource *seat_resource, uint32_t id) {
struct wlr_seat_client *seat_client = struct wlr_seat_client *seat_client =
wlr_seat_client_from_resource(seat_resource); wlr_seat_client_from_resource(seat_resource);
if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_KEYBOARD)) { if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_KEYBOARD)) {
wlr_log(WLR_ERROR, "Client sent get_keyboard on seat without the " wl_resource_post_error(seat_resource, 0,
"keyboard capability"); "wl_seat.get_keyboard called when no keyboard capability has existed");
return; return;
} }
@ -47,9 +47,9 @@ static void seat_handle_get_touch(struct wl_client *client,
struct wl_resource *seat_resource, uint32_t id) { struct wl_resource *seat_resource, uint32_t id) {
struct wlr_seat_client *seat_client = struct wlr_seat_client *seat_client =
wlr_seat_client_from_resource(seat_resource); wlr_seat_client_from_resource(seat_resource);
if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_TOUCH)) { if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_TOUCH)) {
wlr_log(WLR_ERROR, "Client sent get_touch on seat without the " wl_resource_post_error(seat_resource, 0,
"touch capability"); "wl_seat.get_touch called when no touch capability has existed");
return; return;
} }
@ -311,6 +311,7 @@ struct wlr_seat_client *wlr_seat_client_for_wl_client(struct wlr_seat *wlr_seat,
void wlr_seat_set_capabilities(struct wlr_seat *wlr_seat, void wlr_seat_set_capabilities(struct wlr_seat *wlr_seat,
uint32_t capabilities) { uint32_t capabilities) {
wlr_seat->capabilities = capabilities; wlr_seat->capabilities = capabilities;
wlr_seat->accumulated_capabilities |= capabilities;
struct wlr_seat_client *client; struct wlr_seat_client *client;
wl_list_for_each(client, &wlr_seat->clients, link) { wl_list_for_each(client, &wlr_seat->clients, link) {

5
types/seat/wlr_seat_keyboard.c
View file

@ -410,6 +410,11 @@ void seat_client_create_keyboard(struct wlr_seat_client *seat_client,
keyboard_handle_resource_destroy); keyboard_handle_resource_destroy);
wl_list_insert(&seat_client->keyboards, wl_resource_get_link(resource)); wl_list_insert(&seat_client->keyboards, wl_resource_get_link(resource));
if ((seat_client->seat->capabilities & WL_SEAT_CAPABILITY_KEYBOARD) == 0) {
wl_resource_set_user_data(resource, NULL);
return;
}
struct wlr_keyboard *keyboard = seat_client->seat->keyboard_state.keyboard; struct wlr_keyboard *keyboard = seat_client->seat->keyboard_state.keyboard;
if (keyboard == NULL) { if (keyboard == NULL) {
return; return;

5
types/seat/wlr_seat_pointer.c
View file

@ -410,6 +410,11 @@ void seat_client_create_pointer(struct wlr_seat_client *seat_client,
&pointer_handle_resource_destroy); &pointer_handle_resource_destroy);
wl_list_insert(&seat_client->pointers, wl_resource_get_link(resource)); wl_list_insert(&seat_client->pointers, wl_resource_get_link(resource));
if ((seat_client->seat->capabilities & WL_SEAT_CAPABILITY_POINTER) == 0) {
wl_resource_set_user_data(resource, NULL);
return;
}
struct wlr_seat_client *focused_client = struct wlr_seat_client *focused_client =
seat_client->seat->pointer_state.focused_client; seat_client->seat->pointer_state.focused_client;
struct wlr_surface *focused_surface = struct wlr_surface *focused_surface =

4
types/seat/wlr_seat_touch.c
View file

@ -366,6 +366,10 @@ void seat_client_create_touch(struct wlr_seat_client *seat_client,
wl_resource_set_implementation(resource, &touch_impl, seat_client, wl_resource_set_implementation(resource, &touch_impl, seat_client,
&touch_handle_resource_destroy); &touch_handle_resource_destroy);
wl_list_insert(&seat_client->touches, wl_resource_get_link(resource)); wl_list_insert(&seat_client->touches, wl_resource_get_link(resource));
if ((seat_client->seat->capabilities & WL_SEAT_CAPABILITY_TOUCH) == 0) {
wl_resource_set_user_data(resource, NULL);
}
} }
void seat_client_destroy_touch(struct wl_resource *resource) { void seat_client_destroy_touch(struct wl_resource *resource) {