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xwayland: refactor selection code

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This commit is contained in:
emersion 2018-04-03 12:12:57 -04:00
parent 67dec2da2b
commit 591ea27cf9
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GPG Key ID: 0FDE7BE0E88F5E48
9 changed files with 1626 additions and 1530 deletions
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72
include/xwayland/selection.h Normal file
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@ -0,0 +1,72 @@
#ifndef XWAYLAND_SELECTION_H
#define XWAYLAND_SELECTION_H
#include <xcb/xfixes.h>
#define INCR_CHUNK_SIZE (64 * 1024)
#define XDND_VERSION 5
struct wlr_xwm_selection;
struct wlr_xwm_selection_transfer {
struct wlr_xwm_selection *selection;
bool incr;
bool flush_property_on_delete;
bool property_set;
struct wl_array source_data;
int source_fd;
struct wl_event_source *source;
// when sending to x11
xcb_selection_request_event_t request;
struct wl_list outgoing_link;
// when receiving from x11
int property_start;
xcb_get_property_reply_t *property_reply;
};
struct wlr_xwm_selection {
struct wlr_xwm *xwm;
xcb_atom_t atom;
xcb_window_t window;
xcb_window_t owner;
xcb_timestamp_t timestamp;
struct wlr_xwm_selection_transfer incoming;
struct wl_list outgoing;
};
void xwm_selection_transfer_remove_source(
struct wlr_xwm_selection_transfer *transfer);
void xwm_selection_transfer_close_source_fd(
struct wlr_xwm_selection_transfer *transfer);
void xwm_selection_transfer_destroy_property_reply(
struct wlr_xwm_selection_transfer *transfer);
xcb_atom_t xwm_mime_type_to_atom(struct wlr_xwm *xwm, char *mime_type);
char *xwm_mime_type_from_atom(struct wlr_xwm *xwm, xcb_atom_t atom);
struct wlr_xwm_selection *xwm_get_selection(struct wlr_xwm *xwm,
xcb_atom_t selection_atom);
void xwm_send_incr_chunk(struct wlr_xwm_selection_transfer *transfer);
void xwm_handle_selection_request(struct wlr_xwm *xwm,
xcb_selection_request_event_t *req);
void xwm_get_incr_chunk(struct wlr_xwm_selection_transfer *transfer);
void xwm_handle_selection_notify(struct wlr_xwm *xwm,
xcb_selection_notify_event_t *event);
int xwm_handle_xfixes_selection_notify(struct wlr_xwm *xwm,
xcb_xfixes_selection_notify_event_t *event);
bool wlr_data_source_is_xwayland_data_source(struct wlr_data_source *wlr_source);
bool wlr_primary_selection_source_is_xwayland_primary_selection_source(
struct wlr_primary_selection_source *wlr_source);
void xwm_seat_handle_start_drag(struct wlr_xwm *xwm, struct wlr_drag *drag);
void xwm_selection_init(struct wlr_xwm *xwm);
void xwm_selection_finish(struct wlr_xwm *xwm);
#endif

52
include/xwayland/xwm.h
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@ -5,13 +5,18 @@
#include <wlr/config.h>
#include <wlr/xwayland.h>
#include <xcb/render.h>
#ifdef WLR_HAS_XCB_ICCCM
#include <xcb/xcb_icccm.h>
#include <xcb/xcb_icccm.h>
#endif
#ifdef WLR_HAS_XCB_ERRORS
#include <xcb/xcb_errors.h>
#include <xcb/xcb_errors.h>
#endif
#include "xwayland/selection.h"
/* This is in xcb/xcb_event.h, but pulling xcb-util just for a constant
* others redefine anyway is meh
*/
#define XCB_EVENT_RESPONSE_TYPE_MASK (0x7f)
enum atom_name {
WL_SURFACE_ID,
@ -79,40 +84,6 @@ enum net_wm_state_action {
NET_WM_STATE_TOGGLE = 2,
};
#define XDND_VERSION 5
struct wlr_xwm_selection;
struct wlr_xwm_selection_transfer {
struct wlr_xwm_selection *selection;
bool incr;
bool flush_property_on_delete;
bool property_set;
struct wl_array source_data;
int source_fd;
struct wl_event_source *source;
// when sending to x11
xcb_selection_request_event_t request;
struct wl_list outgoing_link;
// when receiving from x11
int property_start;
xcb_get_property_reply_t *property_reply;
};
struct wlr_xwm_selection {
struct wlr_xwm *xwm;
xcb_atom_t atom;
xcb_window_t window;
xcb_window_t owner;
xcb_timestamp_t timestamp;
struct wlr_xwm_selection_transfer incoming;
struct wl_list outgoing;
};
struct wlr_xwm {
struct wlr_xwayland *xwayland;
struct wl_event_source *event_source;
@ -168,15 +139,12 @@ void xwm_set_cursor(struct wlr_xwm *xwm, const uint8_t *pixels, uint32_t stride,
int xwm_handle_selection_event(struct wlr_xwm *xwm, xcb_generic_event_t *event);
int xwm_handle_selection_client_message(struct wlr_xwm *xwm,
xcb_client_message_event_t *ev);
void xwm_selection_init(struct wlr_xwm *xwm);
void xwm_selection_finish(struct wlr_xwm *xwm);
xcb_client_message_event_t *ev);
void xwm_set_seat(struct wlr_xwm *xwm, struct wlr_seat *seat);
char *xwm_get_atom_name(struct wlr_xwm *xwm, xcb_atom_t atom);
bool xwm_atoms_contains(struct wlr_xwm *xwm, xcb_atom_t *atoms,
size_t num_atoms, enum atom_name needle);
size_t num_atoms, enum atom_name needle);
#endif

5
xwayland/meson.build
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@ -1,7 +1,10 @@
lib_wlr_xwayland = static_library(
'wlr_xwayland',
files(
'selection.c',
'selection/dnd.c',
'selection/incoming.c',
'selection/outgoing.c',
'selection/selection.c',
'sockets.c',
'xwayland.c',
'xwm.c',

1483
xwayland/selection.c
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340
xwayland/selection/dnd.c Normal file
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@ -0,0 +1,340 @@
#define _XOPEN_SOURCE 700
#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_primary_selection.h>
#include <wlr/util/log.h>
#include <xcb/xfixes.h>
#include "xwayland/xwm.h"
#include "xwayland/selection.h"
static xcb_atom_t data_device_manager_dnd_action_to_atom(
struct wlr_xwm *xwm, enum wl_data_device_manager_dnd_action action) {
if (action & WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY) {
return xwm->atoms[DND_ACTION_COPY];
} else if (action & WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE) {
return xwm->atoms[DND_ACTION_MOVE];
} else if (action & WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK) {
return xwm->atoms[DND_ACTION_ASK];
}
return XCB_ATOM_NONE;
}
static enum wl_data_device_manager_dnd_action
data_device_manager_dnd_action_from_atom(struct wlr_xwm *xwm,
enum atom_name atom) {
if (atom == xwm->atoms[DND_ACTION_COPY] ||
atom == xwm->atoms[DND_ACTION_PRIVATE]) {
return WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
} else if (atom == xwm->atoms[DND_ACTION_MOVE]) {
return WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE;
} else if (atom == xwm->atoms[DND_ACTION_ASK]) {
return WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK;
}
return WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
}
static void xwm_dnd_send_event(struct wlr_xwm *xwm, xcb_atom_t type,
xcb_client_message_data_t *data) {
struct wlr_xwayland_surface *dest = xwm->drag_focus;
assert(dest != NULL);
xcb_client_message_event_t event = {
.response_type = XCB_CLIENT_MESSAGE,
.format = 32,
.sequence = 0,
.window = dest->window_id,
.type = type,
.data = *data,
};
xcb_send_event(xwm->xcb_conn,
0, // propagate
dest->window_id,
XCB_EVENT_MASK_NO_EVENT,
(const char *)&event);
xcb_flush(xwm->xcb_conn);
}
static void xwm_dnd_send_enter(struct wlr_xwm *xwm) {
struct wlr_drag *drag = xwm->drag;
assert(drag != NULL);
struct wl_array *mime_types = &drag->source->mime_types;
xcb_client_message_data_t data = { 0 };
data.data32[0] = xwm->dnd_window;
data.data32[1] = XDND_VERSION << 24;
// If we have 3 MIME types or less, we can send them directly in the
// DND_ENTER message
size_t n = mime_types->size / sizeof(char *);
if (n <= 3) {
size_t i = 0;
char **mime_type_ptr;
wl_array_for_each(mime_type_ptr, mime_types) {
char *mime_type = *mime_type_ptr;
data.data32[2+i] = xwm_mime_type_to_atom(xwm, mime_type);
++i;
}
} else {
// Let the client know that targets are not contained in the message
// data and must be retrieved with the DND_TYPE_LIST property
data.data32[1] |= 1;
xcb_atom_t targets[n];
size_t i = 0;
char **mime_type_ptr;
wl_array_for_each(mime_type_ptr, mime_types) {
char *mime_type = *mime_type_ptr;
targets[i] = xwm_mime_type_to_atom(xwm, mime_type);
++i;
}
xcb_change_property(xwm->xcb_conn,
XCB_PROP_MODE_REPLACE,
xwm->dnd_window,
xwm->atoms[DND_TYPE_LIST],
XCB_ATOM_ATOM,
32, // format
n, targets);
}
xwm_dnd_send_event(xwm, xwm->atoms[DND_ENTER], &data);
}
static void xwm_dnd_send_position(struct wlr_xwm *xwm, uint32_t time, int16_t x,
int16_t y) {
struct wlr_drag *drag = xwm->drag;
assert(drag != NULL);
xcb_client_message_data_t data = { 0 };
data.data32[0] = xwm->dnd_window;
data.data32[2] = (x << 16) | y;
data.data32[3] = time;
data.data32[4] =
data_device_manager_dnd_action_to_atom(xwm, drag->source->actions);
xwm_dnd_send_event(xwm, xwm->atoms[DND_POSITION], &data);
}
static void xwm_dnd_send_drop(struct wlr_xwm *xwm, uint32_t time) {
struct wlr_drag *drag = xwm->drag;
assert(drag != NULL);
struct wlr_xwayland_surface *dest = xwm->drag_focus;
assert(dest != NULL);
xcb_client_message_data_t data = { 0 };
data.data32[0] = xwm->dnd_window;
data.data32[2] = time;
xwm_dnd_send_event(xwm, xwm->atoms[DND_DROP], &data);
}
static void xwm_dnd_send_leave(struct wlr_xwm *xwm) {
struct wlr_drag *drag = xwm->drag;
assert(drag != NULL);
struct wlr_xwayland_surface *dest = xwm->drag_focus;
assert(dest != NULL);
xcb_client_message_data_t data = { 0 };
data.data32[0] = xwm->dnd_window;
xwm_dnd_send_event(xwm, xwm->atoms[DND_LEAVE], &data);
}
/*static void xwm_dnd_send_finished(struct wlr_xwm *xwm) {
struct wlr_drag *drag = xwm->drag;
assert(drag != NULL);
struct wlr_xwayland_surface *dest = xwm->drag_focus;
assert(dest != NULL);
xcb_client_message_data_t data = { 0 };
data.data32[0] = xwm->dnd_window;
data.data32[1] = drag->source->accepted;
if (drag->source->accepted) {
data.data32[2] = data_device_manager_dnd_action_to_atom(xwm,
drag->source->current_dnd_action);
}
xwm_dnd_send_event(xwm, xwm->atoms[DND_FINISHED], &data);
}*/
int xwm_handle_selection_client_message(struct wlr_xwm *xwm,
xcb_client_message_event_t *ev) {
if (ev->type == xwm->atoms[DND_STATUS]) {
if (xwm->drag == NULL) {
wlr_log(L_DEBUG, "ignoring XdndStatus client message because "
"there's no drag");
return 1;
}
xcb_client_message_data_t *data = &ev->data;
xcb_window_t target_window = data->data32[0];
bool accepted = data->data32[1] & 1;
xcb_atom_t action_atom = data->data32[4];
if (xwm->drag_focus == NULL ||
target_window != xwm->drag_focus->window_id) {
wlr_log(L_DEBUG, "ignoring XdndStatus client message because "
"it doesn't match the current drag focus window ID");
return 1;
}
enum wl_data_device_manager_dnd_action action =
data_device_manager_dnd_action_from_atom(xwm, action_atom);
struct wlr_drag *drag = xwm->drag;
assert(drag != NULL);
drag->source->accepted = accepted;
wlr_data_source_dnd_action(drag->source, action);
wlr_log(L_DEBUG, "DND_STATUS window=%d accepted=%d action=%d",
target_window, accepted, action);
return 1;
} else if (ev->type == xwm->atoms[DND_FINISHED]) {
// This should only happen after the drag has ended, but before the drag
// source is destroyed
if (xwm->seat == NULL || xwm->seat->drag_source == NULL ||
xwm->drag != NULL) {
wlr_log(L_DEBUG, "ignoring XdndFinished client message because "
"there's no finished drag");
return 1;
}
struct wlr_data_source *source = xwm->seat->drag_source;
xcb_client_message_data_t *data = &ev->data;
xcb_window_t target_window = data->data32[0];
bool performed = data->data32[1] & 1;
xcb_atom_t action_atom = data->data32[2];
if (xwm->drag_focus == NULL ||
target_window != xwm->drag_focus->window_id) {
wlr_log(L_DEBUG, "ignoring XdndFinished client message because "
"it doesn't match the finished drag focus window ID");
return 1;
}
enum wl_data_device_manager_dnd_action action =
data_device_manager_dnd_action_from_atom(xwm, action_atom);
if (performed) {
wlr_data_source_dnd_finish(source);
}
wlr_log(L_DEBUG, "DND_FINISH window=%d performed=%d action=%d",
target_window, performed, action);
return 1;
} else {
return 0;
}
}
static void seat_handle_drag_focus(struct wl_listener *listener, void *data) {
struct wlr_drag *drag = data;
struct wlr_xwm *xwm = wl_container_of(listener, xwm, seat_drag_focus);
struct wlr_xwayland_surface *focus = NULL;
if (drag->focus != NULL) {
// TODO: check for subsurfaces?
struct wlr_xwayland_surface *surface;
wl_list_for_each(surface, &xwm->surfaces, link) {
if (surface->surface == drag->focus) {
focus = surface;
break;
}
}
}
if (focus == xwm->drag_focus) {
return;
}
if (xwm->drag_focus != NULL) {
wlr_data_source_dnd_action(drag->source,
WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE);
xwm_dnd_send_leave(xwm);
}
xwm->drag_focus = focus;
if (xwm->drag_focus != NULL) {
xwm_dnd_send_enter(xwm);
}
}
static void seat_handle_drag_motion(struct wl_listener *listener, void *data) {
struct wlr_xwm *xwm = wl_container_of(listener, xwm, seat_drag_motion);
struct wlr_drag_motion_event *event = data;
struct wlr_xwayland_surface *surface = xwm->drag_focus;
if (surface == NULL) {
return; // No xwayland surface focused
}
xwm_dnd_send_position(xwm, event->time, surface->x + (int16_t)event->sx,
surface->y + (int16_t)event->sy);
}
static void seat_handle_drag_drop(struct wl_listener *listener, void *data) {
struct wlr_xwm *xwm = wl_container_of(listener, xwm, seat_drag_drop);
struct wlr_drag_drop_event *event = data;
if (xwm->drag_focus == NULL) {
return; // No xwayland surface focused
}
wlr_log(L_DEBUG, "Wayland drag dropped over an Xwayland window");
xwm_dnd_send_drop(xwm, event->time);
}
static void seat_handle_drag_destroy(struct wl_listener *listener, void *data) {
struct wlr_xwm *xwm = wl_container_of(listener, xwm, seat_drag_destroy);
// Don't reset drag focus yet because the target will read the drag source
// right after
if (xwm->drag_focus != NULL && !xwm->drag->source->accepted) {
wlr_log(L_DEBUG, "Wayland drag cancelled over an Xwayland window");
xwm_dnd_send_leave(xwm);
}
wl_list_remove(&xwm->seat_drag_focus.link);
wl_list_remove(&xwm->seat_drag_motion.link);
wl_list_remove(&xwm->seat_drag_drop.link);
wl_list_remove(&xwm->seat_drag_destroy.link);
xwm->drag = NULL;
}
static void seat_handle_drag_source_destroy(struct wl_listener *listener,
void *data) {
struct wlr_xwm *xwm =
wl_container_of(listener, xwm, seat_drag_source_destroy);
wl_list_remove(&xwm->seat_drag_source_destroy.link);
xwm->drag_focus = NULL;
}
void xwm_seat_handle_start_drag(struct wlr_xwm *xwm, struct wlr_drag *drag) {
xwm->drag = drag;
xwm->drag_focus = NULL;
if (drag != NULL) {
wl_signal_add(&drag->events.focus, &xwm->seat_drag_focus);
xwm->seat_drag_focus.notify = seat_handle_drag_focus;
wl_signal_add(&drag->events.motion, &xwm->seat_drag_motion);
xwm->seat_drag_motion.notify = seat_handle_drag_motion;
wl_signal_add(&drag->events.drop, &xwm->seat_drag_drop);
xwm->seat_drag_drop.notify = seat_handle_drag_drop;
wl_signal_add(&drag->events.destroy, &xwm->seat_drag_destroy);
xwm->seat_drag_destroy.notify = seat_handle_drag_destroy;
wl_signal_add(&drag->source->events.destroy,
&xwm->seat_drag_source_destroy);
xwm->seat_drag_source_destroy.notify = seat_handle_drag_source_destroy;
}
}

461
xwayland/selection/incoming.c Normal file
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@ -0,0 +1,461 @@
#define _XOPEN_SOURCE 700
#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_primary_selection.h>
#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);
wlr_log(L_ERROR, "write error to target fd: %m");
return 1;
}
wlr_log(L_DEBUG, "wrote %ld (chunk size %ld) of %d bytes",
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) {
wlr_log(L_DEBUG, "deleting property");
xcb_delete_property(xwm->xcb_conn, transfer->selection->window,
xwm->atoms[WL_SELECTION]);
xcb_flush(xwm->xcb_conn);
} else {
wlr_log(L_DEBUG, "transfer complete");
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;
wlr_log(L_DEBUG, "xwm_get_incr_chunk");
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) {
wlr_log(L_ERROR, "cannot get selection property");
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 {
wlr_log(L_DEBUG, "transfer complete");
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) {
wlr_log(L_ERROR, "Cannot get selection property");
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, int32_t fd) {
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) {
wlr_log(L_DEBUG, "Cannot send X11 selection to Wayland: "
"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 wlr_data_source_is_xwayland_data_source(
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(wlr_data_source_is_xwayland_data_source(wlr_source));
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_primary_selection_source base;
struct wlr_xwm_selection *selection;
struct wl_array mime_types_atoms;
};
static void primary_selection_source_cancel(
struct wlr_primary_selection_source *wlr_source);
bool wlr_primary_selection_source_is_xwayland_primary_selection_source(
struct wlr_primary_selection_source *wlr_source) {
return wlr_source->cancel == primary_selection_source_cancel;
}
static void primary_selection_source_send(
struct wlr_primary_selection_source *wlr_source, const char *mime_type,
int32_t fd) {
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_cancel(
struct wlr_primary_selection_source *wlr_source) {
struct x11_primary_selection_source *source =
(struct x11_primary_selection_source *)wlr_source;
wlr_primary_selection_source_finish(&source->base);
wl_array_release(&source->mime_types_atoms);
free(source);
}
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) {
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_primary_selection_source_init(&source->base);
source->base.send = primary_selection_source_send;
source->base.cancel = primary_selection_source_cancel;
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_primary_selection(xwm->seat, &source->base,
wl_display_next_serial(xwm->xwayland->wl_display));
} else {
source->base.cancel(&source->base);
}
} else if (selection == &xwm->dnd_selection) {
// TODO
}
}
void xwm_handle_selection_notify(struct wlr_xwm *xwm,
xcb_selection_notify_event_t *event) {
wlr_log(L_DEBUG, "XCB_SELECTION_NOTIFY (selection=%u, property=%u, target=%u)",
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) {
wlr_log(L_ERROR, "convert selection failed");
} else if (event->target == xwm->atoms[TARGETS]) {
// No xwayland surface focused, deny access to clipboard
if (xwm->focus_surface == NULL) {
wlr_log(L_DEBUG, "denying write access to clipboard: "
"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) {
wlr_log(L_DEBUG, "XCB_XFIXES_SELECTION_NOTIFY (selection=%u, owner=%u)",
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));
} else if (selection == &xwm->primary_selection) {
wlr_seat_set_primary_selection(xwm->seat, NULL,
wl_display_next_serial(xwm->xwayland->wl_display));
} else if (selection == &xwm->dnd_selection) {
// TODO: DND
} else {
wlr_log(L_DEBUG, "X11 selection has been cleared, but cannot "
"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;
}

420
xwayland/selection/outgoing.c Normal file
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#define _XOPEN_SOURCE 700
#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_primary_selection.h>
#include <wlr/util/log.h>
#include <xcb/xfixes.h>
#include "xwayland/xwm.h"
#include "xwayland/selection.h"
static void xwm_selection_send_notify(struct wlr_xwm *xwm,
xcb_selection_request_event_t *req, bool success) {
xcb_selection_notify_event_t selection_notify = {
.response_type = XCB_SELECTION_NOTIFY,
.sequence = 0,
.time = req->time,
.requestor = req->requestor,
.selection = req->selection,
.target = req->target,
.property = success ? req->property : XCB_ATOM_NONE,
};
wlr_log(L_DEBUG, "SendEvent destination=%d SelectionNotify(31) time=%d "
"requestor=%d selection=%d target=%d property=%d", req->requestor,
req->time, req->requestor, req->selection, req->target,
selection_notify.property);
xcb_send_event(xwm->xcb_conn,
0, // propagate
req->requestor,
XCB_EVENT_MASK_NO_EVENT,
(const char *)&selection_notify);
xcb_flush(xwm->xcb_conn);
}
static int xwm_selection_flush_source_data(
struct wlr_xwm_selection_transfer *transfer) {
xcb_change_property(transfer->selection->xwm->xcb_conn,
XCB_PROP_MODE_REPLACE,
transfer->request.requestor,
transfer->request.property,
transfer->request.target,
8, // format
transfer->source_data.size,
transfer->source_data.data);
xcb_flush(transfer->selection->xwm->xcb_conn);
transfer->property_set = true;
size_t length = transfer->source_data.size;
transfer->source_data.size = 0;
return length;
}
static void xwm_selection_transfer_start_outgoing(
struct wlr_xwm_selection_transfer *transfer);
static void xwm_selection_transfer_destroy_outgoing(
struct wlr_xwm_selection_transfer *transfer) {
wl_list_remove(&transfer->outgoing_link);
// Start next queued transfer
struct wlr_xwm_selection_transfer *first = NULL;
if (!wl_list_empty(&transfer->selection->outgoing)) {
first = wl_container_of(transfer->selection->outgoing.prev, first,
outgoing_link);
xwm_selection_transfer_start_outgoing(first);
}
xwm_selection_transfer_remove_source(transfer);
xwm_selection_transfer_close_source_fd(transfer);
wl_array_release(&transfer->source_data);
free(transfer);
}
static int xwm_data_source_read(int fd, uint32_t mask, void *data) {
struct wlr_xwm_selection_transfer *transfer = data;
struct wlr_xwm *xwm = transfer->selection->xwm;
void *p;
size_t current = transfer->source_data.size;
if (transfer->source_data.size < INCR_CHUNK_SIZE) {
p = wl_array_add(&transfer->source_data, INCR_CHUNK_SIZE);
if (p == NULL) {
wlr_log(L_ERROR, "Could not allocate selection source_data");
goto error_out;
}
} else {
p = (char *)transfer->source_data.data + transfer->source_data.size;
}
size_t available = transfer->source_data.alloc - current;
ssize_t len = read(fd, p, available);
if (len == -1) {
wlr_log(L_ERROR, "read error from data source: %m");
goto error_out;
}
wlr_log(L_DEBUG, "read %ld bytes (available %zu, mask 0x%x)", len,
available, mask);
transfer->source_data.size = current + len;
if (transfer->source_data.size >= INCR_CHUNK_SIZE) {
if (!transfer->incr) {
wlr_log(L_DEBUG, "got %zu bytes, starting incr",
transfer->source_data.size);
size_t incr_chunk_size = INCR_CHUNK_SIZE;
xcb_change_property(xwm->xcb_conn,
XCB_PROP_MODE_REPLACE,
transfer->request.requestor,
transfer->request.property,
xwm->atoms[INCR],
32, /* format */
1, &incr_chunk_size);
transfer->incr = true;
transfer->property_set = true;
transfer->flush_property_on_delete = true;
xwm_selection_transfer_remove_source(transfer);
xwm_selection_send_notify(xwm, &transfer->request, true);
} else if (transfer->property_set) {
wlr_log(L_DEBUG, "got %zu bytes, waiting for property delete",
transfer->source_data.size);
transfer->flush_property_on_delete = true;
xwm_selection_transfer_remove_source(transfer);
} else {
wlr_log(L_DEBUG, "got %zu bytes, property deleted, setting new "
"property", transfer->source_data.size);
xwm_selection_flush_source_data(transfer);
}
} else if (len == 0 && !transfer->incr) {
wlr_log(L_DEBUG, "non-incr transfer complete");
xwm_selection_flush_source_data(transfer);
xwm_selection_send_notify(xwm, &transfer->request, true);
xwm_selection_transfer_destroy_outgoing(transfer);
} else if (len == 0 && transfer->incr) {
wlr_log(L_DEBUG, "incr transfer complete");
transfer->flush_property_on_delete = true;
if (transfer->property_set) {
wlr_log(L_DEBUG, "got %zu bytes, waiting for property delete",
transfer->source_data.size);
} else {
wlr_log(L_DEBUG, "got %zu bytes, property deleted, setting new "
"property", transfer->source_data.size);
xwm_selection_flush_source_data(transfer);
}
xwm_selection_transfer_remove_source(transfer);
xwm_selection_transfer_close_source_fd(transfer);
} else {
wlr_log(L_DEBUG, "nothing happened, buffered the bytes");
}
return 1;
error_out:
xwm_selection_send_notify(xwm, &transfer->request, false);
xwm_selection_transfer_destroy_outgoing(transfer);
return 0;
}
void xwm_send_incr_chunk(struct wlr_xwm_selection_transfer *transfer) {
wlr_log(L_DEBUG, "property deleted");
transfer->property_set = false;
if (transfer->flush_property_on_delete) {
wlr_log(L_DEBUG, "setting new property, %zu bytes",
transfer->source_data.size);
transfer->flush_property_on_delete = false;
int length = xwm_selection_flush_source_data(transfer);
if (transfer->source_fd >= 0) {
xwm_selection_transfer_start_outgoing(transfer);
} else if (length > 0) {
/* Transfer is all done, but queue a flush for
* the delete of the last chunk so we can set
* the 0 sized property to signal the end of
* the transfer. */
transfer->flush_property_on_delete = true;
wl_array_release(&transfer->source_data);
wl_array_init(&transfer->source_data);
} else {
xwm_selection_transfer_destroy_outgoing(transfer);
}
}
}
static void xwm_selection_source_send(struct wlr_xwm_selection *selection,
const char *mime_type, int32_t fd) {
if (selection == &selection->xwm->clipboard_selection) {
struct wlr_data_source *source =
selection->xwm->seat->selection_source;
if (source != NULL) {
wlr_data_source_send(source, mime_type, fd);
return;
}
} else if (selection == &selection->xwm->primary_selection) {
struct wlr_primary_selection_source *source =
selection->xwm->seat->primary_selection_source;
if (source != NULL) {
source->send(source, mime_type, fd);
return;
}
} else if (selection == &selection->xwm->dnd_selection) {
struct wlr_data_source *source =
selection->xwm->seat->drag_source;
if (source != NULL) {
wlr_data_source_send(source, mime_type, fd);
return;
}
}
wlr_log(L_DEBUG, "not sending selection: no selection source available");
}
static void xwm_selection_transfer_start_outgoing(
struct wlr_xwm_selection_transfer *transfer) {
struct wlr_xwm *xwm = transfer->selection->xwm;
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_READABLE, xwm_data_source_read, transfer);
}
static struct wl_array *xwm_selection_source_get_mime_types(
struct wlr_xwm_selection *selection) {
if (selection == &selection->xwm->clipboard_selection) {
struct wlr_data_source *source =
selection->xwm->seat->selection_source;
if (source != NULL) {
return &source->mime_types;
}
} else if (selection == &selection->xwm->primary_selection) {
struct wlr_primary_selection_source *source =
selection->xwm->seat->primary_selection_source;
if (source != NULL) {
return &source->mime_types;
}
} else if (selection == &selection->xwm->dnd_selection) {
struct wlr_data_source *source =
selection->xwm->seat->drag_source;
if (source != NULL) {
return &source->mime_types;
}
}
return NULL;
}
/**
* Read the Wayland selection and send it to an Xwayland client.
*/
static void xwm_selection_send_data(struct wlr_xwm_selection *selection,
xcb_selection_request_event_t *req, const char *mime_type) {
// Check MIME type
struct wl_array *mime_types =
xwm_selection_source_get_mime_types(selection);
if (mime_types == NULL) {
wlr_log(L_ERROR, "not sending selection: no MIME type list available");
xwm_selection_send_notify(selection->xwm, req, false);
return;
}
bool found = false;
char **mime_type_ptr;
wl_array_for_each(mime_type_ptr, mime_types) {
char *t = *mime_type_ptr;
if (strcmp(t, mime_type) == 0) {
found = true;
break;
}
}
if (!found) {
wlr_log(L_ERROR, "not sending selection: "
"requested an unsupported MIME type %s", mime_type);
xwm_selection_send_notify(selection->xwm, req, false);
return;
}
struct wlr_xwm_selection_transfer *transfer =
calloc(1, sizeof(struct wlr_xwm_selection_transfer));
if (transfer == NULL) {
wlr_log(L_ERROR, "Allocation failed");
return;
}
transfer->selection = selection;
transfer->request = *req;
wl_array_init(&transfer->source_data);
int p[2];
if (pipe(p) == -1) {
wlr_log(L_ERROR, "pipe() failed: %m");
xwm_selection_send_notify(selection->xwm, req, false);
return;
}
fcntl(p[0], F_SETFD, FD_CLOEXEC);
fcntl(p[0], F_SETFL, O_NONBLOCK);
fcntl(p[1], F_SETFD, FD_CLOEXEC);
fcntl(p[1], F_SETFL, O_NONBLOCK);
transfer->source_fd = p[0];
wlr_log(L_DEBUG, "Sending Wayland selection %u to Xwayland window with "
"MIME type %s, target %u", req->target, mime_type, req->target);
xwm_selection_source_send(selection, mime_type, p[1]);
wl_list_insert(&selection->outgoing, &transfer->outgoing_link);
// We can only handle one transfer at a time
if (wl_list_length(&selection->outgoing) == 1) {
xwm_selection_transfer_start_outgoing(transfer);
}
}
static void xwm_selection_send_targets(struct wlr_xwm_selection *selection,
xcb_selection_request_event_t *req) {
struct wlr_xwm *xwm = selection->xwm;
struct wl_array *mime_types =
xwm_selection_source_get_mime_types(selection);
if (mime_types == NULL) {
wlr_log(L_ERROR, "not sending selection targets: "
"no selection source available");
xwm_selection_send_notify(selection->xwm, req, false);
return;
}
size_t n = 2 + mime_types->size / sizeof(char *);
xcb_atom_t targets[n];
targets[0] = xwm->atoms[TIMESTAMP];
targets[1] = xwm->atoms[TARGETS];
size_t i = 0;
char **mime_type_ptr;
wl_array_for_each(mime_type_ptr, mime_types) {
char *mime_type = *mime_type_ptr;
targets[2+i] = xwm_mime_type_to_atom(xwm, mime_type);
++i;
}
xcb_change_property(xwm->xcb_conn,
XCB_PROP_MODE_REPLACE,
req->requestor,
req->property,
XCB_ATOM_ATOM,
32, // format
n, targets);
xwm_selection_send_notify(selection->xwm, req, true);
}
static void xwm_selection_send_timestamp(struct wlr_xwm_selection *selection,
xcb_selection_request_event_t *req) {
xcb_change_property(selection->xwm->xcb_conn,
XCB_PROP_MODE_REPLACE,
req->requestor,
req->property,
XCB_ATOM_INTEGER,
32, // format
1, &selection->timestamp);
xwm_selection_send_notify(selection->xwm, req, true);
}
void xwm_handle_selection_request(struct wlr_xwm *xwm,
xcb_selection_request_event_t *req) {
wlr_log(L_DEBUG, "XCB_SELECTION_REQUEST (time=%u owner=%u, requestor=%u "
"selection=%u, target=%u, property=%u)",
req->time, req->owner, req->requestor, req->selection, req->target,
req->property);
if (req->selection == xwm->atoms[CLIPBOARD_MANAGER]) {
// The wlroots clipboard should already have grabbed the first target,
// so just send selection notify now. This isn't synchronized with the
// clipboard finishing getting the data, so there's a race here.
xwm_selection_send_notify(xwm, req, true);
return;
}
struct wlr_xwm_selection *selection =
xwm_get_selection(xwm, req->selection);
if (selection == NULL) {
wlr_log(L_DEBUG, "received selection request for unknown selection");
return;
}
if (selection->window != req->owner) {
wlr_log(L_DEBUG, "received selection request with invalid owner");
return;
}
// No xwayland surface focused, deny access to clipboard
if (xwm->focus_surface == NULL && xwm->drag_focus == NULL) {
char *selection_name = xwm_get_atom_name(xwm, selection->atom);
wlr_log(L_DEBUG, "denying read access to selection %u (%s): "
"no xwayland surface focused", selection->atom, selection_name);
free(selection_name);
xwm_selection_send_notify(xwm, req, false);
return;
}
if (req->target == xwm->atoms[TARGETS]) {
xwm_selection_send_targets(selection, req);
} else if (req->target == xwm->atoms[TIMESTAMP]) {
xwm_selection_send_timestamp(selection, req);
} else if (req->target == xwm->atoms[DELETE]) {
xwm_selection_send_notify(selection->xwm, req, true);
} else {
// Send data
char *mime_type = xwm_mime_type_from_atom(xwm, req->target);
if (mime_type == NULL) {
wlr_log(L_ERROR, "ignoring selection request: unknown atom %u",
req->target);
xwm_selection_send_notify(xwm, req, false);
return;
}
xwm_selection_send_data(selection, req, mime_type);
free(mime_type);
}
}

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xwayland/selection/selection.c Normal file
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#define _XOPEN_SOURCE 700
#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_primary_selection.h>
#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) {
wlr_log(L_DEBUG, "not handling selection events: "
"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 &&
wlr_data_source_is_xwayland_data_source(
xwm->seat->selection_source)) {
wlr_seat_set_selection(xwm->seat, NULL,
wl_display_next_serial(xwm->xwayland->wl_display));
}
if (xwm->seat->primary_selection_source &&
wlr_primary_selection_source_is_xwayland_primary_selection_source(
xwm->seat->primary_selection_source)) {
wlr_seat_set_primary_selection(xwm->seat, NULL,
wl_display_next_serial(xwm->xwayland->wl_display));
}
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 && wlr_data_source_is_xwayland_data_source(source)) {
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_primary_selection_source *source = seat->primary_selection_source;
if (source != NULL &&
wlr_primary_selection_source_is_xwayland_primary_selection_source(
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);
}

4
xwayland/xwm.c
View File

@ -1055,10 +1055,6 @@ static void xwm_handle_unhandled_event(struct wlr_xwm *xwm, xcb_generic_event_t
#endif
}
/* This is in xcb/xcb_event.h, but pulling xcb-util just for a constant
* others redefine anyway is meh
*/
#define XCB_EVENT_RESPONSE_TYPE_MASK (0x7f)
static int x11_event_handler(int fd, uint32_t mask, void *data) {
int count = 0;
xcb_generic_event_t *event;