wlroots/xwayland/selection/selection.c

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#define _POSIX_C_SOURCE 200809L
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#include <assert.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wlr/types/wlr_data_device.h>
#include <wlr/types/wlr_gtk_primary_selection.h>
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#include <wlr/util/log.h>
#include <xcb/xfixes.h>
#include "xwayland/xwm.h"
#include "xwayland/selection.h"
void xwm_selection_transfer_remove_source(
struct wlr_xwm_selection_transfer *transfer) {
if (transfer->source != NULL) {
wl_event_source_remove(transfer->source);
transfer->source = NULL;
}
}
void xwm_selection_transfer_close_source_fd(
struct wlr_xwm_selection_transfer *transfer) {
if (transfer->source_fd >= 0) {
close(transfer->source_fd);
transfer->source_fd = -1;
}
}
void xwm_selection_transfer_destroy_property_reply(
struct wlr_xwm_selection_transfer *transfer) {
free(transfer->property_reply);
transfer->property_reply = NULL;
}
xcb_atom_t xwm_mime_type_to_atom(struct wlr_xwm *xwm, char *mime_type) {
if (strcmp(mime_type, "text/plain;charset=utf-8") == 0) {
return xwm->atoms[UTF8_STRING];
} else if (strcmp(mime_type, "text/plain") == 0) {
return xwm->atoms[TEXT];
}
xcb_intern_atom_cookie_t cookie =
xcb_intern_atom(xwm->xcb_conn, 0, strlen(mime_type), mime_type);
xcb_intern_atom_reply_t *reply =
xcb_intern_atom_reply(xwm->xcb_conn, cookie, NULL);
if (reply == NULL) {
return XCB_ATOM_NONE;
}
xcb_atom_t atom = reply->atom;
free(reply);
return atom;
}
char *xwm_mime_type_from_atom(struct wlr_xwm *xwm, xcb_atom_t atom) {
if (atom == xwm->atoms[UTF8_STRING]) {
return strdup("text/plain;charset=utf-8");
} else if (atom == xwm->atoms[TEXT]) {
return strdup("text/plain");
} else {
return xwm_get_atom_name(xwm, atom);
}
}
struct wlr_xwm_selection *xwm_get_selection(struct wlr_xwm *xwm,
xcb_atom_t selection_atom) {
if (selection_atom == xwm->atoms[CLIPBOARD]) {
return &xwm->clipboard_selection;
} else if (selection_atom == xwm->atoms[PRIMARY]) {
return &xwm->primary_selection;
} else if (selection_atom == xwm->atoms[DND_SELECTION]) {
return &xwm->dnd_selection;
} else {
return NULL;
}
}
static int xwm_handle_selection_property_notify(struct wlr_xwm *xwm,
xcb_property_notify_event_t *event) {
struct wlr_xwm_selection *selections[] = {
&xwm->clipboard_selection,
&xwm->primary_selection,
&xwm->dnd_selection,
};
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);
}
return 1;
}
struct wlr_xwm_selection_transfer *outgoing;
wl_list_for_each(outgoing, &selection->outgoing, outgoing_link) {
if (event->window == outgoing->request.requestor) {
if (event->state == XCB_PROPERTY_DELETE &&
event->atom == outgoing->request.property &&
outgoing->incr) {
xwm_send_incr_chunk(outgoing);
}
return 1;
}
}
}
return 0;
}
int xwm_handle_selection_event(struct wlr_xwm *xwm,
xcb_generic_event_t *event) {
if (xwm->seat == NULL) {
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wlr_log(WLR_DEBUG, "not handling selection events: "
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"no seat assigned to xwayland");
return 0;
}
switch (event->response_type & XCB_EVENT_RESPONSE_TYPE_MASK) {
case XCB_SELECTION_NOTIFY:
xwm_handle_selection_notify(xwm, (xcb_selection_notify_event_t *)event);
return 1;
case XCB_PROPERTY_NOTIFY:
return xwm_handle_selection_property_notify(xwm,
(xcb_property_notify_event_t *)event);
case XCB_SELECTION_REQUEST:
xwm_handle_selection_request(xwm,
(xcb_selection_request_event_t *)event);
return 1;
}
switch (event->response_type - xwm->xfixes->first_event) {
case XCB_XFIXES_SELECTION_NOTIFY:
// an X11 window has copied something to the clipboard
return xwm_handle_xfixes_selection_notify(xwm,
(xcb_xfixes_selection_notify_event_t *)event);
}
return 0;
}
static void selection_init(struct wlr_xwm *xwm,
struct wlr_xwm_selection *selection, xcb_atom_t atom) {
selection->xwm = xwm;
selection->atom = atom;
selection->window = xwm->selection_window;
selection->incoming.selection = selection;
wl_list_init(&selection->outgoing);
uint32_t mask =
XCB_XFIXES_SELECTION_EVENT_MASK_SET_SELECTION_OWNER |
XCB_XFIXES_SELECTION_EVENT_MASK_SELECTION_WINDOW_DESTROY |
XCB_XFIXES_SELECTION_EVENT_MASK_SELECTION_CLIENT_CLOSE;
xcb_xfixes_select_selection_input(xwm->xcb_conn, selection->window,
selection->atom, mask);
}
void xwm_selection_init(struct wlr_xwm *xwm) {
// Clipboard and primary selection
uint32_t selection_values[] = {
XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_PROPERTY_CHANGE
};
xwm->selection_window = xcb_generate_id(xwm->xcb_conn);
xcb_create_window(xwm->xcb_conn,
XCB_COPY_FROM_PARENT,
xwm->selection_window,
xwm->screen->root,
0, 0,
10, 10,
0,
XCB_WINDOW_CLASS_INPUT_OUTPUT,
xwm->screen->root_visual,
XCB_CW_EVENT_MASK, selection_values);
xcb_set_selection_owner(xwm->xcb_conn,
xwm->selection_window,
xwm->atoms[CLIPBOARD_MANAGER],
XCB_TIME_CURRENT_TIME);
selection_init(xwm, &xwm->clipboard_selection, xwm->atoms[CLIPBOARD]);
selection_init(xwm, &xwm->primary_selection, xwm->atoms[PRIMARY]);
// Drag'n'drop
uint32_t dnd_values[] = {
XCB_EVENT_MASK_SUBSTRUCTURE_NOTIFY | XCB_EVENT_MASK_PROPERTY_CHANGE
};
xwm->dnd_window = xcb_generate_id(xwm->xcb_conn);
xcb_create_window(xwm->xcb_conn,
XCB_COPY_FROM_PARENT,
xwm->dnd_window,
xwm->screen->root,
0, 0,
8192, 8192,
0,
XCB_WINDOW_CLASS_INPUT_ONLY,
xwm->screen->root_visual,
XCB_CW_EVENT_MASK, dnd_values);
uint32_t version = XDND_VERSION;
xcb_change_property(xwm->xcb_conn,
XCB_PROP_MODE_REPLACE,
xwm->dnd_window,
xwm->atoms[DND_AWARE],
XCB_ATOM_ATOM,
32, // format
1, &version);
selection_init(xwm, &xwm->dnd_selection, xwm->atoms[DND_SELECTION]);
}
void xwm_selection_finish(struct wlr_xwm *xwm) {
if (!xwm) {
return;
}
if (xwm->selection_window) {
xcb_destroy_window(xwm->xcb_conn, xwm->selection_window);
}
if (xwm->dnd_window) {
xcb_destroy_window(xwm->xcb_conn, xwm->dnd_window);
}
if (xwm->seat) {
if (xwm->seat->selection_source &&
data_source_is_xwayland(
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xwm->seat->selection_source)) {
wlr_seat_set_selection(xwm->seat, NULL,
wl_display_next_serial(xwm->xwayland->wl_display));
}
gtk-primary-selection: refactor everything, untie from seat This commits completely refactors wlr_gtk_primary_selection. The goal is to remove gtk-primary-selection state from the seat and better handle inert resources where it makes sense. wlr_seat_client.primary_selection_devices has been removed and replaced by wlr_gtk_primary_selection_device. This allows us to make offers inert when the current selection is replaced. wlr_seat_set_primary_selection has been removed because it relied on wlr_seat instead of wlr_gtk_primary_selection_device_manager. A new function, wlr_gtk_primary_selection_device_manager_set_selection (candidate for the longest function name in wlroots) has been added. It doesn't take a serial anymore as serial checking only makes sense for set_selection requests coming from Wayland clients (serial checking is now done in the Wayland interface implementation). Since wlr_gtk_primary_selection_device_manager is now required to set the selection, a new function wlr_xwayland_set_gtk_primary_selection_device_manager (candidate number two for longest function name) has been added. Devices are now made inert when the seat goes away. Future work includes removing the last primary selection bits from the seat, mainly wlr_seat.primary_selection_source and wlr_seat.events.primary_selection, replacing those with new fields in wlr_gtk_primary_selection_device. Or maybe we could keep those in the seat and replace them with a re-usable interface (for future zwp_primary_selection_v1 support). We need to think how we'll sync these three protocols (GTK, X11 and wayland-protocols). See https://github.com/swaywm/wlroots/issues/1388
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if (xwm->xwayland->gtk_primary_selection &&
xwm->seat->primary_selection_source &&
primary_selection_source_is_xwayland(
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xwm->seat->primary_selection_source)) {
gtk-primary-selection: refactor everything, untie from seat This commits completely refactors wlr_gtk_primary_selection. The goal is to remove gtk-primary-selection state from the seat and better handle inert resources where it makes sense. wlr_seat_client.primary_selection_devices has been removed and replaced by wlr_gtk_primary_selection_device. This allows us to make offers inert when the current selection is replaced. wlr_seat_set_primary_selection has been removed because it relied on wlr_seat instead of wlr_gtk_primary_selection_device_manager. A new function, wlr_gtk_primary_selection_device_manager_set_selection (candidate for the longest function name in wlroots) has been added. It doesn't take a serial anymore as serial checking only makes sense for set_selection requests coming from Wayland clients (serial checking is now done in the Wayland interface implementation). Since wlr_gtk_primary_selection_device_manager is now required to set the selection, a new function wlr_xwayland_set_gtk_primary_selection_device_manager (candidate number two for longest function name) has been added. Devices are now made inert when the seat goes away. Future work includes removing the last primary selection bits from the seat, mainly wlr_seat.primary_selection_source and wlr_seat.events.primary_selection, replacing those with new fields in wlr_gtk_primary_selection_device. Or maybe we could keep those in the seat and replace them with a re-usable interface (for future zwp_primary_selection_v1 support). We need to think how we'll sync these three protocols (GTK, X11 and wayland-protocols). See https://github.com/swaywm/wlroots/issues/1388
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wlr_gtk_primary_selection_device_manager_set_selection(
xwm->xwayland->gtk_primary_selection, xwm->seat, NULL);
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}
wlr_xwayland_set_seat(xwm->xwayland, NULL);
}
}
static void xwm_selection_set_owner(struct wlr_xwm_selection *selection,
bool set) {
if (set) {
xcb_set_selection_owner(selection->xwm->xcb_conn,
selection->window,
selection->atom,
XCB_TIME_CURRENT_TIME);
} else {
if (selection->owner == selection->window) {
xcb_set_selection_owner(selection->xwm->xcb_conn,
XCB_WINDOW_NONE,
selection->atom,
selection->timestamp);
}
}
}
static void seat_handle_selection(struct wl_listener *listener,
void *data) {
struct wlr_seat *seat = data;
struct wlr_xwm *xwm =
wl_container_of(listener, xwm, seat_selection);
struct wlr_data_source *source = seat->selection_source;
if (source != NULL && data_source_is_xwayland(source)) {
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return;
}
xwm_selection_set_owner(&xwm->clipboard_selection, source != NULL);
}
static void seat_handle_primary_selection(struct wl_listener *listener,
void *data) {
struct wlr_seat *seat = data;
struct wlr_xwm *xwm =
wl_container_of(listener, xwm, seat_primary_selection);
struct wlr_gtk_primary_selection_source *source = seat->primary_selection_source;
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if (source != NULL &&
primary_selection_source_is_xwayland(
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source)) {
return;
}
xwm_selection_set_owner(&xwm->primary_selection, source != NULL);
}
static void seat_handle_start_drag(struct wl_listener *listener, void *data) {
struct wlr_xwm *xwm = wl_container_of(listener, xwm, seat_start_drag);
struct wlr_drag *drag = data;
xwm_selection_set_owner(&xwm->dnd_selection, drag != NULL);
xwm_seat_handle_start_drag(xwm, drag);
}
void xwm_set_seat(struct wlr_xwm *xwm, struct wlr_seat *seat) {
if (xwm->seat != NULL) {
wl_list_remove(&xwm->seat_selection.link);
wl_list_remove(&xwm->seat_primary_selection.link);
wl_list_remove(&xwm->seat_start_drag.link);
xwm->seat = NULL;
}
if (seat == NULL) {
return;
}
xwm->seat = seat;
wl_signal_add(&seat->events.selection, &xwm->seat_selection);
xwm->seat_selection.notify = seat_handle_selection;
wl_signal_add(&seat->events.primary_selection, &xwm->seat_primary_selection);
xwm->seat_primary_selection.notify = seat_handle_primary_selection;
wl_signal_add(&seat->events.start_drag, &xwm->seat_start_drag);
xwm->seat_start_drag.notify = seat_handle_start_drag;
seat_handle_selection(&xwm->seat_selection, seat);
seat_handle_primary_selection(&xwm->seat_primary_selection, seat);
}