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seat: Create inert objects for missing capabilities
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
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5 changed files with 25 additions and 9 deletions
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@ -214,6 +214,7 @@ struct wlr_seat {
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char *name;
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uint32_t capabilities;
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uint32_t accumulated_capabilities;
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struct timespec last_event;
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struct wlr_data_source *selection_source;
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@ -19,9 +19,9 @@ static void seat_handle_get_pointer(struct wl_client *client,
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struct wl_resource *seat_resource, uint32_t id) {
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struct wlr_seat_client *seat_client =
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wlr_seat_client_from_resource(seat_resource);
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if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_POINTER)) {
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wlr_log(WLR_ERROR, "Client sent get_pointer on seat without the "
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"pointer capability");
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if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_POINTER)) {
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wl_resource_post_error(seat_resource, 0,
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"wl_seat.get_pointer called when no pointer capability has existed");
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return;
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}
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@ -33,9 +33,9 @@ static void seat_handle_get_keyboard(struct wl_client *client,
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struct wl_resource *seat_resource, uint32_t id) {
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struct wlr_seat_client *seat_client =
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wlr_seat_client_from_resource(seat_resource);
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if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_KEYBOARD)) {
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wlr_log(WLR_ERROR, "Client sent get_keyboard on seat without the "
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"keyboard capability");
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if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_KEYBOARD)) {
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wl_resource_post_error(seat_resource, 0,
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"wl_seat.get_keyboard called when no keyboard capability has existed");
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return;
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}
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@ -47,9 +47,9 @@ static void seat_handle_get_touch(struct wl_client *client,
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struct wl_resource *seat_resource, uint32_t id) {
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struct wlr_seat_client *seat_client =
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wlr_seat_client_from_resource(seat_resource);
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if (!(seat_client->seat->capabilities & WL_SEAT_CAPABILITY_TOUCH)) {
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wlr_log(WLR_ERROR, "Client sent get_touch on seat without the "
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"touch capability");
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if (!(seat_client->seat->accumulated_capabilities & WL_SEAT_CAPABILITY_TOUCH)) {
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wl_resource_post_error(seat_resource, 0,
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"wl_seat.get_touch called when no touch capability has existed");
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return;
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}
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@ -311,6 +311,7 @@ struct wlr_seat_client *wlr_seat_client_for_wl_client(struct wlr_seat *wlr_seat,
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void wlr_seat_set_capabilities(struct wlr_seat *wlr_seat,
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uint32_t capabilities) {
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wlr_seat->capabilities = capabilities;
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wlr_seat->accumulated_capabilities |= capabilities;
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struct wlr_seat_client *client;
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wl_list_for_each(client, &wlr_seat->clients, link) {
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@ -410,6 +410,11 @@ void seat_client_create_keyboard(struct wlr_seat_client *seat_client,
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keyboard_handle_resource_destroy);
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wl_list_insert(&seat_client->keyboards, wl_resource_get_link(resource));
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if ((seat_client->seat->capabilities & WL_SEAT_CAPABILITY_KEYBOARD) == 0) {
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wl_resource_set_user_data(resource, NULL);
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return;
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}
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struct wlr_keyboard *keyboard = seat_client->seat->keyboard_state.keyboard;
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if (keyboard == NULL) {
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return;
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@ -410,6 +410,11 @@ void seat_client_create_pointer(struct wlr_seat_client *seat_client,
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&pointer_handle_resource_destroy);
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wl_list_insert(&seat_client->pointers, wl_resource_get_link(resource));
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if ((seat_client->seat->capabilities & WL_SEAT_CAPABILITY_POINTER) == 0) {
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wl_resource_set_user_data(resource, NULL);
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return;
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}
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struct wlr_seat_client *focused_client =
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seat_client->seat->pointer_state.focused_client;
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struct wlr_surface *focused_surface =
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@ -366,6 +366,10 @@ void seat_client_create_touch(struct wlr_seat_client *seat_client,
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wl_resource_set_implementation(resource, &touch_impl, seat_client,
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&touch_handle_resource_destroy);
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wl_list_insert(&seat_client->touches, wl_resource_get_link(resource));
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if ((seat_client->seat->capabilities & WL_SEAT_CAPABILITY_TOUCH) == 0) {
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wl_resource_set_user_data(resource, NULL);
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}
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}
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void seat_client_destroy_touch(struct wl_resource *resource) {
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