mirror of
https://github.com/hyprwm/wlroots-hyprland.git
synced 2024-11-12 16:35:58 +01:00
xwayland/selection: use one X11 window per incoming transfer
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:
parent
0977633457
commit
7964a313e8
5 changed files with 158 additions and 91 deletions
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@ -20,37 +20,43 @@ struct wlr_xwm_selection_transfer {
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struct wl_array source_data;
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int wl_client_fd;
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struct wl_event_source *event_source;
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struct wl_list link;
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// when sending to x11
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xcb_selection_request_event_t request;
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struct wl_list outgoing_link;
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// when receiving from x11
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int property_start;
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xcb_get_property_reply_t *property_reply;
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xcb_window_t incoming_window;
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};
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struct wlr_xwm_selection {
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struct wlr_xwm *xwm;
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xcb_atom_t atom;
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xcb_window_t window;
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xcb_window_t owner;
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xcb_timestamp_t timestamp;
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struct wlr_xwm_selection_transfer incoming;
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struct wl_list incoming;
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struct wl_list outgoing;
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};
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struct wlr_xwm_selection_transfer *
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xwm_selection_find_incoming_transfer_by_window(
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struct wlr_xwm_selection *selection, xcb_window_t window);
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void xwm_selection_transfer_remove_event_source(
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struct wlr_xwm_selection_transfer *transfer);
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void xwm_selection_transfer_close_wl_client_fd(
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struct wlr_xwm_selection_transfer *transfer);
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void xwm_selection_transfer_destroy_property_reply(
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struct wlr_xwm_selection_transfer *transfer);
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void xwm_selection_transfer_init(struct wlr_xwm_selection_transfer *transfer);
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void xwm_selection_transfer_finish(struct wlr_xwm_selection_transfer *transfer);
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bool xwm_selection_transfer_get_selection_property(
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struct wlr_xwm_selection_transfer *transfer, bool delete);
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void xwm_selection_transfer_init(struct wlr_xwm_selection_transfer *transfer,
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struct wlr_xwm_selection *selection);
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void xwm_selection_transfer_destroy(
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struct wlr_xwm_selection_transfer *transfer);
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void xwm_selection_transfer_destroy_outgoing(
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struct wlr_xwm_selection_transfer *transfer);
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@ -103,6 +103,8 @@ struct wlr_xwm {
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xcb_render_pictformat_t render_format_id;
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xcb_cursor_t cursor;
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// FIXME: need one per selection to simultaneously request both mimetypes,
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// I think.
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xcb_window_t selection_window;
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struct wlr_xwm_selection clipboard_selection;
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struct wlr_xwm_selection primary_selection;
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@ -11,13 +11,84 @@
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#include "xwayland/selection.h"
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#include "xwayland/xwm.h"
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static struct wlr_xwm_selection_transfer *
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xwm_selection_transfer_create_incoming(struct wlr_xwm_selection *selection) {
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struct wlr_xwm_selection_transfer *transfer = calloc(1, sizeof(*transfer));
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if (!transfer) {
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return NULL;
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}
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xwm_selection_transfer_init(transfer, selection);
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wl_list_insert(&selection->incoming, &transfer->link);
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struct wlr_xwm *xwm = selection->xwm;
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transfer->incoming_window = xcb_generate_id(xwm->xcb_conn);
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xcb_create_window(
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xwm->xcb_conn,
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XCB_COPY_FROM_PARENT,
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transfer->incoming_window,
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xwm->screen->root,
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0, 0,
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10, 10,
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0,
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XCB_WINDOW_CLASS_INPUT_OUTPUT,
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xwm->screen->root_visual,
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XCB_CW_EVENT_MASK, (uint32_t[]){
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XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_PROPERTY_CHANGE
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}
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);
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xcb_flush(xwm->xcb_conn);
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return transfer;
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}
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struct wlr_xwm_selection_transfer *
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xwm_selection_find_incoming_transfer_by_window(
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struct wlr_xwm_selection *selection, xcb_window_t window) {
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struct wlr_xwm_selection_transfer *transfer;
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wl_list_for_each(transfer, &selection->incoming, link) {
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if (transfer->incoming_window == window) {
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return transfer;
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}
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}
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return NULL;
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}
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static bool xwm_selection_transfer_get_incoming_selection_property(
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struct wlr_xwm_selection_transfer *transfer, bool delete) {
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struct wlr_xwm *xwm = transfer->selection->xwm;
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xcb_get_property_cookie_t cookie = xcb_get_property(
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xwm->xcb_conn,
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delete,
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transfer->incoming_window,
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xwm->atoms[WL_SELECTION],
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XCB_GET_PROPERTY_TYPE_ANY,
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0, // offset
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0x1fffffff // length
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);
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transfer->property_start = 0;
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transfer->property_reply =
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xcb_get_property_reply(xwm->xcb_conn, cookie, NULL);
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if (!transfer->property_reply) {
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wlr_log(WLR_ERROR, "cannot get selection property");
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return false;
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}
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return true;
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}
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static void xwm_notify_ready_for_next_incr_chunk(
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struct wlr_xwm_selection_transfer *transfer) {
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struct wlr_xwm *xwm = transfer->selection->xwm;
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assert(transfer->incr);
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wlr_log(WLR_DEBUG, "deleting property");
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xcb_delete_property(xwm->xcb_conn, transfer->selection->window,
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xcb_delete_property(xwm->xcb_conn, transfer->incoming_window,
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xwm->atoms[WL_SELECTION]);
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xcb_flush(xwm->xcb_conn);
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@ -40,7 +111,7 @@ static int write_selection_property_to_wl_client(int fd, uint32_t mask,
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ssize_t len = write(fd, property + transfer->property_start, remainder);
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if (len == -1) {
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wlr_log_errno(WLR_ERROR, "write error to target fd %d", fd);
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xwm_selection_transfer_finish(transfer);
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xwm_selection_transfer_destroy(transfer);
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return 0;
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}
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@ -56,7 +127,7 @@ static int write_selection_property_to_wl_client(int fd, uint32_t mask,
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xwm_notify_ready_for_next_incr_chunk(transfer);
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} else {
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wlr_log(WLR_DEBUG, "transfer complete");
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xwm_selection_transfer_finish(transfer);
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xwm_selection_transfer_destroy(transfer);
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}
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return 0;
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@ -93,7 +164,7 @@ void xwm_get_incr_chunk(struct wlr_xwm_selection_transfer *transfer) {
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return;
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}
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if (!xwm_selection_transfer_get_selection_property(transfer, false)) {
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if (!xwm_selection_transfer_get_incoming_selection_property(transfer, false)) {
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return;
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}
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@ -101,15 +172,15 @@ void xwm_get_incr_chunk(struct wlr_xwm_selection_transfer *transfer) {
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xwm_write_selection_property_to_wl_client(transfer);
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} else {
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wlr_log(WLR_DEBUG, "incremental transfer complete");
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xwm_selection_transfer_finish(transfer);
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xwm_selection_transfer_destroy(transfer);
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}
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}
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static void xwm_selection_get_data(struct wlr_xwm_selection *selection) {
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struct wlr_xwm *xwm = selection->xwm;
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struct wlr_xwm_selection_transfer *transfer = &selection->incoming;
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static void xwm_selection_transfer_get_data(
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struct wlr_xwm_selection_transfer *transfer) {
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struct wlr_xwm *xwm = transfer->selection->xwm;
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if (!xwm_selection_transfer_get_selection_property(transfer, true)) {
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if (!xwm_selection_transfer_get_incoming_selection_property(transfer, true)) {
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return;
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}
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@ -127,7 +198,6 @@ static void source_send(struct wlr_xwm_selection *selection,
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struct wl_array *mime_types, struct wl_array *mime_types_atoms,
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const char *requested_mime_type, int fd) {
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struct wlr_xwm *xwm = selection->xwm;
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struct wlr_xwm_selection_transfer *transfer = &selection->incoming;
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xcb_atom_t *atoms = mime_types_atoms->data;
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bool found = false;
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@ -150,23 +220,16 @@ static void source_send(struct wlr_xwm_selection *selection,
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return;
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}
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// FIXME: we currently can't handle two X11-to-Wayland transfers at once due
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// to reusing the same X11 window. Proceeding further here would lead us to
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// lose track of the current `transfer->wl_client_fd` and use-after-free
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// during cleanup. This doesn't happen often, but bail now to avoid a
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// compositor crash later.
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if (transfer->wl_client_fd >= 0) {
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wlr_log(WLR_ERROR, "source_send fd %d, but %d already in progress", fd,
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transfer->wl_client_fd);
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if (transfer->wl_client_fd != fd) {
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close(fd);
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}
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struct wlr_xwm_selection_transfer *transfer =
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xwm_selection_transfer_create_incoming(selection);
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if (!transfer) {
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wlr_log(WLR_ERROR, "Cannot create transfer");
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close(fd);
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return;
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}
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xcb_convert_selection(xwm->xcb_conn,
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selection->window,
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transfer->incoming_window,
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selection->atom,
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mime_type_atom,
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xwm->atoms[WL_SELECTION],
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@ -269,7 +332,7 @@ static bool source_get_targets(struct wlr_xwm_selection *selection,
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XCB_GET_PROPERTY_TYPE_ANY,
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0, // offset
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4096 // length
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);
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);
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xcb_get_property_reply_t *reply =
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xcb_get_property_reply(xwm->xcb_conn, cookie, NULL);
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@ -395,23 +458,26 @@ void xwm_handle_selection_notify(struct wlr_xwm *xwm,
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return;
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}
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struct wlr_xwm_selection_transfer *transfer =
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xwm_selection_find_incoming_transfer_by_window(selection, event->requestor);
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if (event->property == XCB_ATOM_NONE) {
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wlr_log(WLR_ERROR, "convert selection failed");
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xwm_selection_transfer_finish(&selection->incoming);
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if (transfer) {
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wlr_log(WLR_ERROR, "convert selection failed");
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xwm_selection_transfer_destroy(transfer);
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}
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} else if (event->target == xwm->atoms[TARGETS]) {
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// No xwayland surface focused, deny access to clipboard
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if (xwm->focus_surface == NULL) {
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wlr_log(WLR_DEBUG, "denying write access to clipboard: "
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"no xwayland surface focused");
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// Would leak this transfer otherwise. Should never happen.
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assert(selection->incoming.wl_client_fd < 0);
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return;
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}
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// This sets the Wayland clipboard (by calling wlr_seat_set_selection)
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xwm_selection_get_targets(selection);
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} else {
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xwm_selection_get_data(selection);
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} else if (transfer) {
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xwm_selection_transfer_get_data(transfer);
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}
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}
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@ -428,8 +494,7 @@ int xwm_handle_xfixes_selection_notify(struct wlr_xwm *xwm,
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if (event->owner == XCB_WINDOW_NONE) {
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if (selection->owner != selection->window) {
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// A real X client selection went away, not our
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// proxy selection
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// A real X client selection went away, not our proxy selection
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if (selection == &xwm->clipboard_selection) {
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wlr_seat_request_set_selection(xwm->seat, NULL, NULL,
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wl_display_next_serial(xwm->xwayland->wl_display));
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@ -450,22 +515,23 @@ int xwm_handle_xfixes_selection_notify(struct wlr_xwm *xwm,
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selection->owner = event->owner;
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// We have to use XCB_TIME_CURRENT_TIME when we claim the
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// selection, so grab the actual timestamp here so we can
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// answer TIMESTAMP conversion requests correctly.
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if (event->owner == selection->window) {
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// We have to use XCB_TIME_CURRENT_TIME when we claim the selection, so
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// grab the actual timestamp here so we can answer TIMESTAMP conversion
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// requests correctly.
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selection->timestamp = event->timestamp;
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return 1;
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}
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struct wlr_xwm_selection_transfer *transfer = &selection->incoming;
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transfer->incr = false;
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// doing this will give a selection notify where we actually handle the sync
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xcb_convert_selection(xwm->xcb_conn, selection->window,
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xcb_convert_selection(
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xwm->xcb_conn,
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selection->window,
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selection->atom,
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xwm->atoms[TARGETS],
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xwm->atoms[WL_SELECTION],
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event->timestamp);
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event->timestamp
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);
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xcb_flush(xwm->xcb_conn);
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return 1;
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@ -59,8 +59,7 @@ static struct wlr_xwm_selection_transfer *xwm_selection_transfer_get_first(
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struct wlr_xwm_selection *selection) {
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struct wlr_xwm_selection_transfer *first = NULL;
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if (!wl_list_empty(&selection->outgoing)) {
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first = wl_container_of(selection->outgoing.prev, first,
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outgoing_link);
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first = wl_container_of(selection->outgoing.prev, first, link);
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}
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return first;
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@ -70,7 +69,7 @@ void xwm_selection_transfer_destroy_outgoing(
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struct wlr_xwm_selection_transfer *transfer) {
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struct wlr_xwm_selection *selection = transfer->selection;
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bool was_first = transfer == xwm_selection_transfer_get_first(selection);
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wl_list_remove(&transfer->outgoing_link);
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wl_list_remove(&transfer->link);
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wlr_log(WLR_DEBUG, "Destroying transfer %p", transfer);
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// Start next queued transfer if we just removed the active one.
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@ -297,8 +296,7 @@ static bool xwm_selection_send_data(struct wlr_xwm_selection *selection,
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return false;
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}
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xwm_selection_transfer_init(transfer);
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transfer->selection = selection;
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xwm_selection_transfer_init(transfer, selection);
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transfer->request = *req;
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wl_array_init(&transfer->source_data);
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@ -325,7 +323,7 @@ static bool xwm_selection_send_data(struct wlr_xwm_selection *selection,
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// from it. It appears to only ever read from the latest, so purge stale
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// transfers to prevent clipboard hangs.
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struct wlr_xwm_selection_transfer *outgoing, *tmp;
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wl_list_for_each_safe(outgoing, tmp, &selection->outgoing, outgoing_link) {
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wl_list_for_each_safe(outgoing, tmp, &selection->outgoing, link) {
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if (transfer->request.requestor == outgoing->request.requestor) {
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wlr_log(WLR_DEBUG, "Destroying stale transfer %p", outgoing);
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xwm_selection_send_notify(selection->xwm, &outgoing->request, false);
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@ -333,7 +331,7 @@ static bool xwm_selection_send_data(struct wlr_xwm_selection *selection,
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}
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}
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wl_list_insert(&selection->outgoing, &transfer->outgoing_link);
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wl_list_insert(&selection->outgoing, &transfer->link);
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// We can only handle one transfer at a time
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if (wl_list_length(&selection->outgoing) == 1) {
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@ -341,7 +339,7 @@ static bool xwm_selection_send_data(struct wlr_xwm_selection *selection,
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xwm_selection_transfer_start_outgoing(transfer);
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} else {
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struct wlr_xwm_selection_transfer *outgoing;
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wl_list_for_each(outgoing, &selection->outgoing, outgoing_link) {
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wl_list_for_each(outgoing, &selection->outgoing, link) {
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wlr_log(WLR_DEBUG, "Transfer %p still queued", outgoing);
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}
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}
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@ -477,7 +475,7 @@ void xwm_handle_selection_destroy_notify(struct wlr_xwm *xwm,
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struct wlr_xwm_selection *selection = selections[i];
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struct wlr_xwm_selection_transfer *outgoing, *tmp;
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wl_list_for_each_safe(outgoing, tmp, &selection->outgoing, outgoing_link) {
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wl_list_for_each_safe(outgoing, tmp, &selection->outgoing, link) {
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if (event->window == outgoing->request.requestor) {
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xwm_selection_transfer_destroy_outgoing(outgoing);
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}
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@ -32,42 +32,30 @@ void xwm_selection_transfer_destroy_property_reply(
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transfer->property_reply = NULL;
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}
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void xwm_selection_transfer_init(struct wlr_xwm_selection_transfer *transfer) {
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void xwm_selection_transfer_init(struct wlr_xwm_selection_transfer *transfer,
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struct wlr_xwm_selection *selection) {
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transfer->selection = selection;
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transfer->wl_client_fd = -1;
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}
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void xwm_selection_transfer_finish(
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void xwm_selection_transfer_destroy(
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struct wlr_xwm_selection_transfer *transfer) {
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transfer->incr = false;
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if (!transfer) {
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return;
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}
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xwm_selection_transfer_destroy_property_reply(transfer);
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xwm_selection_transfer_remove_event_source(transfer);
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xwm_selection_transfer_close_wl_client_fd(transfer);
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}
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bool xwm_selection_transfer_get_selection_property(
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struct wlr_xwm_selection_transfer *transfer, bool delete) {
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struct wlr_xwm *xwm = transfer->selection->xwm;
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xcb_get_property_cookie_t cookie = xcb_get_property(
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xwm->xcb_conn,
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delete,
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transfer->selection->window,
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xwm->atoms[WL_SELECTION],
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XCB_GET_PROPERTY_TYPE_ANY,
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0, // offset
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0x1fffffff // length
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);
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transfer->property_start = 0;
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||||
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,
|
||||
|
|
Loading…
Reference in a new issue