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xwayland/selection: use one X11 window per incoming transfer

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This commit introduces logic for using a new X11 window for each
incoming transfer, rather than having a global window for each selection
source.

This eliminates a whole class of bugs involving multiple concurrent
incoming transfers.

For now, we retain the outgoing transfer queue, and the selection
source-specific windows to support it. Source-specific windows are no
longer used in the incoming path, and will be removed in a future PR.

Refs #1497.
This commit is contained in:
Tudor Brindus 2021-01-30 23:43:25 -05:00 • committed by Simon Ser
parent 0977633457
commit 7964a313e8
5 changed files with 158 additions and 91 deletions
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69
xwayland/selection/selection.c
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@ -32,42 +32,30 @@ void xwm_selection_transfer_destroy_property_reply(
transfer->property_reply = NULL;
}
void xwm_selection_transfer_init(struct wlr_xwm_selection_transfer *transfer) {
void xwm_selection_transfer_init(struct wlr_xwm_selection_transfer *transfer,
struct wlr_xwm_selection *selection) {
transfer->selection = selection;
transfer->wl_client_fd = -1;
}
void xwm_selection_transfer_finish(
void xwm_selection_transfer_destroy(
struct wlr_xwm_selection_transfer *transfer) {
transfer->incr = false;
if (!transfer) {
return;
}
xwm_selection_transfer_destroy_property_reply(transfer);
xwm_selection_transfer_remove_event_source(transfer);
xwm_selection_transfer_close_wl_client_fd(transfer);
}
bool xwm_selection_transfer_get_selection_property(
struct wlr_xwm_selection_transfer *transfer, bool delete) {
struct wlr_xwm *xwm = transfer->selection->xwm;
xcb_get_property_cookie_t cookie = xcb_get_property(
xwm->xcb_conn,
delete,
transfer->selection->window,
xwm->atoms[WL_SELECTION],
XCB_GET_PROPERTY_TYPE_ANY,
0, // offset
0x1fffffff // length
);
transfer->property_start = 0;
transfer->property_reply =
xcb_get_property_reply(xwm->xcb_conn, cookie, NULL);
if (!transfer->property_reply) {
wlr_log(WLR_ERROR, "cannot get selection property");
return false;
if (transfer->incoming_window) {
struct wlr_xwm *xwm = transfer->selection->xwm;
xcb_destroy_window(xwm->xcb_conn, transfer->incoming_window);
xcb_flush(xwm->xcb_conn);
}
return true;
wl_list_remove(&transfer->link);
free(transfer);
}
xcb_atom_t xwm_mime_type_to_atom(struct wlr_xwm *xwm, char *mime_type) {
@ -123,17 +111,22 @@ static int xwm_handle_selection_property_notify(struct wlr_xwm *xwm,
for (size_t i = 0; i < sizeof(selections)/sizeof(selections[0]); ++i) {
struct wlr_xwm_selection *selection = selections[i];
if (event->window == selection->window) {
if (event->state == XCB_PROPERTY_NEW_VALUE &&
event->atom == xwm->atoms[WL_SELECTION] &&
selection->incoming.incr) {
xwm_get_incr_chunk(&selection->incoming);
if (event->state == XCB_PROPERTY_NEW_VALUE &&
event->atom == xwm->atoms[WL_SELECTION]) {
struct wlr_xwm_selection_transfer *transfer =
xwm_selection_find_incoming_transfer_by_window(selection,
event->window);
if (transfer) {
if (transfer->incr) {
xwm_get_incr_chunk(transfer);
}
return 1;
}
return 1;
}
struct wlr_xwm_selection_transfer *outgoing;
wl_list_for_each(outgoing, &selection->outgoing, outgoing_link) {
wl_list_for_each(outgoing, &selection->outgoing, link) {
if (event->window == outgoing->request.requestor) {
if (event->state == XCB_PROPERTY_DELETE &&
event->atom == outgoing->request.property &&
@ -184,9 +177,8 @@ void xwm_selection_init(struct wlr_xwm_selection *selection,
selection->xwm = xwm;
selection->atom = atom;
selection->window = xwm->selection_window;
selection->incoming.selection = selection;
wl_list_init(&selection->incoming);
wl_list_init(&selection->outgoing);
xwm_selection_transfer_init(&selection->incoming);
uint32_t mask =
XCB_XFIXES_SELECTION_EVENT_MASK_SET_SELECTION_OWNER |
@ -202,12 +194,15 @@ void xwm_selection_finish(struct wlr_xwm_selection *selection) {
}
struct wlr_xwm_selection_transfer *outgoing, *tmp;
wl_list_for_each_safe(outgoing, tmp, &selection->outgoing, outgoing_link) {
wl_list_for_each_safe(outgoing, tmp, &selection->outgoing, link) {
wlr_log(WLR_INFO, "destroyed pending transfer %p", outgoing);
xwm_selection_transfer_destroy_outgoing(outgoing);
}
xwm_selection_transfer_finish(&selection->incoming);
struct wlr_xwm_selection_transfer *incoming;
wl_list_for_each_safe(incoming, tmp, &selection->incoming, link) {
xwm_selection_transfer_destroy(incoming);
}
}
static void xwm_selection_set_owner(struct wlr_xwm_selection *selection,