wlroots/xwayland/selection/incoming.c

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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"
/**
* Write the X11 selection to a Wayland client.
*/
static int xwm_data_source_write(int fd, uint32_t mask, void *data) {
struct wlr_xwm_selection_transfer *transfer = data;
struct wlr_xwm *xwm = transfer->selection->xwm;
char *property = xcb_get_property_value(transfer->property_reply);
int remainder = xcb_get_property_value_length(transfer->property_reply) -
transfer->property_start;
ssize_t len = write(fd, property + transfer->property_start, remainder);
if (len == -1) {
xwm_selection_transfer_destroy_property_reply(transfer);
xwm_selection_transfer_remove_source(transfer);
xwm_selection_transfer_close_source_fd(transfer);
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wlr_log(WLR_ERROR, "write error to target fd: %m");
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return 1;
}
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wlr_log(WLR_DEBUG, "wrote %zd (chunk size %zd) of %d bytes",
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transfer->property_start + len,
len, xcb_get_property_value_length(transfer->property_reply));
transfer->property_start += len;
if (len == remainder) {
xwm_selection_transfer_destroy_property_reply(transfer);
xwm_selection_transfer_remove_source(transfer);
if (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,
xwm->atoms[WL_SELECTION]);
xcb_flush(xwm->xcb_conn);
} else {
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wlr_log(WLR_DEBUG, "transfer complete");
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xwm_selection_transfer_close_source_fd(transfer);
}
}
return 1;
}
static void xwm_write_property(struct wlr_xwm_selection_transfer *transfer,
xcb_get_property_reply_t *reply) {
struct wlr_xwm *xwm = transfer->selection->xwm;
transfer->property_start = 0;
transfer->property_reply = reply;
xwm_data_source_write(transfer->source_fd, WL_EVENT_WRITABLE, transfer);
if (transfer->property_reply != NULL) {
struct wl_event_loop *loop =
wl_display_get_event_loop(xwm->xwayland->wl_display);
transfer->source = wl_event_loop_add_fd(loop,
transfer->source_fd, WL_EVENT_WRITABLE, xwm_data_source_write,
transfer);
}
}
void xwm_get_incr_chunk(struct wlr_xwm_selection_transfer *transfer) {
struct wlr_xwm *xwm = transfer->selection->xwm;
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wlr_log(WLR_DEBUG, "xwm_get_incr_chunk");
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xcb_get_property_cookie_t cookie = xcb_get_property(xwm->xcb_conn,
0, // delete
transfer->selection->window,
xwm->atoms[WL_SELECTION],
XCB_GET_PROPERTY_TYPE_ANY,
0, // offset
0x1fffffff // length
);
xcb_get_property_reply_t *reply =
xcb_get_property_reply(xwm->xcb_conn, cookie, NULL);
if (reply == NULL) {
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wlr_log(WLR_ERROR, "cannot get selection property");
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return;
}
//dump_property(xwm, xwm->atoms[WL_SELECTION], reply);
if (xcb_get_property_value_length(reply) > 0) {
/* Reply's ownership is transferred to xwm, which is responsible
* for freeing it */
xwm_write_property(transfer, reply);
} else {
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wlr_log(WLR_DEBUG, "transfer complete");
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xwm_selection_transfer_close_source_fd(transfer);
free(reply);
}
}
static void xwm_selection_get_data(struct wlr_xwm_selection *selection) {
struct wlr_xwm *xwm = selection->xwm;
xcb_get_property_cookie_t cookie = xcb_get_property(xwm->xcb_conn,
1, // delete
selection->window,
xwm->atoms[WL_SELECTION],
XCB_GET_PROPERTY_TYPE_ANY,
0, // offset
0x1fffffff // length
);
xcb_get_property_reply_t *reply =
xcb_get_property_reply(xwm->xcb_conn, cookie, NULL);
if (reply == NULL) {
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wlr_log(WLR_ERROR, "Cannot get selection property");
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return;
}
struct wlr_xwm_selection_transfer *transfer = &selection->incoming;
if (reply->type == xwm->atoms[INCR]) {
transfer->incr = true;
free(reply);
} else {
transfer->incr = false;
// reply's ownership is transferred to wm, which is responsible
// for freeing it
xwm_write_property(transfer, reply);
}
}
static void source_send(struct wlr_xwm_selection *selection,
struct wl_array *mime_types, struct wl_array *mime_types_atoms,
const char *requested_mime_type, int fd) {
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struct wlr_xwm *xwm = selection->xwm;
struct wlr_xwm_selection_transfer *transfer = &selection->incoming;
xcb_atom_t *atoms = mime_types_atoms->data;
bool found = false;
xcb_atom_t mime_type_atom;
char **mime_type_ptr;
size_t i = 0;
wl_array_for_each(mime_type_ptr, mime_types) {
char *mime_type = *mime_type_ptr;
if (strcmp(mime_type, requested_mime_type) == 0) {
found = true;
mime_type_atom = atoms[i];
break;
}
++i;
}
if (!found) {
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wlr_log(WLR_DEBUG, "Cannot send X11 selection to Wayland: "
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"unsupported MIME type");
return;
}
xcb_convert_selection(xwm->xcb_conn,
selection->window,
selection->atom,
mime_type_atom,
xwm->atoms[WL_SELECTION],
XCB_TIME_CURRENT_TIME);
xcb_flush(xwm->xcb_conn);
fcntl(fd, F_SETFL, O_WRONLY | O_NONBLOCK);
transfer->source_fd = fd;
}
struct x11_data_source {
struct wlr_data_source base;
struct wlr_xwm_selection *selection;
struct wl_array mime_types_atoms;
};
static const struct wlr_data_source_impl data_source_impl;
bool data_source_is_xwayland(
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struct wlr_data_source *wlr_source) {
return wlr_source->impl == &data_source_impl;
}
static struct x11_data_source *data_source_from_wlr_data_source(
struct wlr_data_source *wlr_source) {
assert(data_source_is_xwayland(wlr_source));
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return (struct x11_data_source *)wlr_source;
}
static void data_source_send(struct wlr_data_source *wlr_source,
const char *mime_type, int32_t fd) {
struct x11_data_source *source =
data_source_from_wlr_data_source(wlr_source);
struct wlr_xwm_selection *selection = source->selection;
source_send(selection, &wlr_source->mime_types, &source->mime_types_atoms,
mime_type, fd);
}
static void data_source_cancel(struct wlr_data_source *wlr_source) {
struct x11_data_source *source =
data_source_from_wlr_data_source(wlr_source);
wlr_data_source_finish(&source->base);
wl_array_release(&source->mime_types_atoms);
free(source);
}
static const struct wlr_data_source_impl data_source_impl = {
.send = data_source_send,
.cancel = data_source_cancel,
};
struct x11_primary_selection_source {
struct wlr_gtk_primary_selection_source base;
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struct wlr_xwm_selection *selection;
struct wl_array mime_types_atoms;
};
static const struct wlr_gtk_primary_selection_source_impl
primary_selection_source_impl;
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bool primary_selection_source_is_xwayland(
struct wlr_gtk_primary_selection_source *wlr_source) {
return wlr_source->impl == &primary_selection_source_impl;
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}
static void primary_selection_source_send(
struct wlr_gtk_primary_selection_source *wlr_source,
const char *mime_type, int fd) {
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struct x11_primary_selection_source *source =
(struct x11_primary_selection_source *)wlr_source;
struct wlr_xwm_selection *selection = source->selection;
source_send(selection, &wlr_source->mime_types, &source->mime_types_atoms,
mime_type, fd);
}
static void primary_selection_source_destroy(
struct wlr_gtk_primary_selection_source *wlr_source) {
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struct x11_primary_selection_source *source =
(struct x11_primary_selection_source *)wlr_source;
wl_array_release(&source->mime_types_atoms);
free(source);
}
static const struct wlr_gtk_primary_selection_source_impl
primary_selection_source_impl = {
.send = primary_selection_source_send,
.destroy = primary_selection_source_destroy,
};
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static bool source_get_targets(struct wlr_xwm_selection *selection,
struct wl_array *mime_types, struct wl_array *mime_types_atoms) {
struct wlr_xwm *xwm = selection->xwm;
xcb_get_property_cookie_t cookie = xcb_get_property(xwm->xcb_conn,
1, // delete
selection->window,
xwm->atoms[WL_SELECTION],
XCB_GET_PROPERTY_TYPE_ANY,
0, // offset
4096 // length
);
xcb_get_property_reply_t *reply =
xcb_get_property_reply(xwm->xcb_conn, cookie, NULL);
if (reply == NULL) {
return false;
}
if (reply->type != XCB_ATOM_ATOM) {
free(reply);
return false;
}
xcb_atom_t *value = xcb_get_property_value(reply);
for (uint32_t i = 0; i < reply->value_len; i++) {
char *mime_type = NULL;
if (value[i] == xwm->atoms[UTF8_STRING]) {
mime_type = strdup("text/plain;charset=utf-8");
} else if (value[i] == xwm->atoms[TEXT]) {
mime_type = strdup("text/plain");
} else if (value[i] != xwm->atoms[TARGETS] &&
value[i] != xwm->atoms[TIMESTAMP]) {
xcb_get_atom_name_cookie_t name_cookie =
xcb_get_atom_name(xwm->xcb_conn, value[i]);
xcb_get_atom_name_reply_t *name_reply =
xcb_get_atom_name_reply(xwm->xcb_conn, name_cookie, NULL);
if (name_reply == NULL) {
continue;
}
size_t len = xcb_get_atom_name_name_length(name_reply);
char *name = xcb_get_atom_name_name(name_reply); // not a C string
if (memchr(name, '/', len) != NULL) {
mime_type = malloc((len + 1) * sizeof(char));
if (mime_type == NULL) {
free(name_reply);
continue;
}
memcpy(mime_type, name, len);
mime_type[len] = '\0';
}
free(name_reply);
}
if (mime_type != NULL) {
char **mime_type_ptr =
wl_array_add(mime_types, sizeof(*mime_type_ptr));
if (mime_type_ptr == NULL) {
free(mime_type);
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break;
}
*mime_type_ptr = mime_type;
xcb_atom_t *atom_ptr =
wl_array_add(mime_types_atoms, sizeof(*atom_ptr));
if (atom_ptr == NULL) {
break;
}
*atom_ptr = value[i];
}
}
free(reply);
return true;
}
static void xwm_selection_get_targets(struct wlr_xwm_selection *selection) {
// set the wayland selection to the X11 selection
struct wlr_xwm *xwm = selection->xwm;
if (selection == &xwm->clipboard_selection) {
struct x11_data_source *source =
calloc(1, sizeof(struct x11_data_source));
if (source == NULL) {
return;
}
wlr_data_source_init(&source->base, &data_source_impl);
source->selection = selection;
wl_array_init(&source->mime_types_atoms);
bool ok = source_get_targets(selection, &source->base.mime_types,
&source->mime_types_atoms);
if (ok) {
wlr_seat_set_selection(xwm->seat, &source->base,
wl_display_next_serial(xwm->xwayland->wl_display));
} else {
wlr_data_source_cancel(&source->base);
}
} else if (selection == &xwm->primary_selection) {
struct x11_primary_selection_source *source =
calloc(1, sizeof(struct x11_primary_selection_source));
if (source == NULL) {
return;
}
wlr_gtk_primary_selection_source_init(&source->base,
&primary_selection_source_impl);
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source->selection = selection;
wl_array_init(&source->mime_types_atoms);
bool ok = source_get_targets(selection, &source->base.mime_types,
&source->mime_types_atoms);
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 (ok && xwm->xwayland->gtk_primary_selection) {
wlr_gtk_primary_selection_device_manager_set_selection(
xwm->xwayland->gtk_primary_selection, xwm->seat, &source->base);
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} else {
wlr_gtk_primary_selection_source_destroy(&source->base);
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}
} else if (selection == &xwm->dnd_selection) {
// TODO
}
}
void xwm_handle_selection_notify(struct wlr_xwm *xwm,
xcb_selection_notify_event_t *event) {
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wlr_log(WLR_DEBUG, "XCB_SELECTION_NOTIFY (selection=%u, property=%u, target=%u)",
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event->selection, event->property,
event->target);
struct wlr_xwm_selection *selection =
xwm_get_selection(xwm, event->selection);
if (selection == NULL) {
return;
}
if (event->property == XCB_ATOM_NONE) {
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wlr_log(WLR_ERROR, "convert selection failed");
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} else if (event->target == xwm->atoms[TARGETS]) {
// No xwayland surface focused, deny access to clipboard
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");
return;
}
// This sets the Wayland clipboard (by calling wlr_seat_set_selection)
xwm_selection_get_targets(selection);
} else {
xwm_selection_get_data(selection);
}
}
int xwm_handle_xfixes_selection_notify(struct wlr_xwm *xwm,
xcb_xfixes_selection_notify_event_t *event) {
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wlr_log(WLR_DEBUG, "XCB_XFIXES_SELECTION_NOTIFY (selection=%u, owner=%u)",
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event->selection, event->owner);
struct wlr_xwm_selection *selection =
xwm_get_selection(xwm, event->selection);
if (selection == NULL) {
return 0;
}
if (event->owner == XCB_WINDOW_NONE) {
if (selection->owner != selection->window) {
// A real X client selection went away, not our
// proxy selection
if (selection == &xwm->clipboard_selection) {
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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} else if (selection == &xwm->primary_selection &&
xwm->xwayland->gtk_primary_selection) {
wlr_gtk_primary_selection_device_manager_set_selection(
xwm->xwayland->gtk_primary_selection, xwm->seat, NULL);
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} else if (selection == &xwm->dnd_selection) {
// TODO: DND
} else {
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wlr_log(WLR_DEBUG, "X11 selection has been cleared, but cannot "
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"clear Wayland selection");
}
}
selection->owner = XCB_WINDOW_NONE;
return 1;
}
selection->owner = event->owner;
// We have to use XCB_TIME_CURRENT_TIME when we claim the
// selection, so grab the actual timestamp here so we can
// answer TIMESTAMP conversion requests correctly.
if (event->owner == selection->window) {
selection->timestamp = event->timestamp;
return 1;
}
struct wlr_xwm_selection_transfer *transfer = &selection->incoming;
transfer->incr = false;
// doing this will give a selection notify where we actually handle the sync
xcb_convert_selection(xwm->xcb_conn, selection->window,
selection->atom,
xwm->atoms[TARGETS],
xwm->atoms[WL_SELECTION],
event->timestamp);
xcb_flush(xwm->xcb_conn);
return 1;
}