weston/libweston/data-device.c
Michael Olbrich 78c94d0719 libweston: explicitly cancel start_drag if no matching input device is found
Otherwise, the client will assume that dragging is in progress and remains in
that state forever.
This can happen when weston processes the mouse up event just before the
start_drag() arrives.

Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
2022-03-04 11:51:01 +00:00

1383 lines
37 KiB
C

/*
* Copyright © 2011 Kristian Høgsberg
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "config.h"
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <assert.h>
#include <libweston/libweston.h>
#include "libweston-internal.h"
#include "shared/helpers.h"
#include "shared/timespec-util.h"
struct weston_drag {
struct wl_client *client;
struct weston_data_source *data_source;
struct wl_listener data_source_listener;
struct weston_view *focus;
struct wl_resource *focus_resource;
struct wl_listener focus_listener;
struct weston_view *icon;
struct wl_listener icon_destroy_listener;
int32_t dx, dy;
struct weston_keyboard_grab keyboard_grab;
};
struct weston_pointer_drag {
struct weston_drag base;
struct weston_pointer_grab grab;
};
struct weston_touch_drag {
struct weston_drag base;
struct weston_touch_grab grab;
};
#define ALL_ACTIONS (WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY | \
WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE | \
WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK)
static void
data_offer_accept(struct wl_client *client, struct wl_resource *resource,
uint32_t serial, const char *mime_type)
{
struct weston_data_offer *offer = wl_resource_get_user_data(resource);
/* Protect against untimely calls from older data offers */
if (!offer->source || offer != offer->source->offer)
return;
/* FIXME: Check that client is currently focused by the input
* device that is currently dragging this data source. Should
* this be a wl_data_device request? */
offer->source->accept(offer->source, serial, mime_type);
offer->source->accepted = mime_type != NULL;
}
static void
data_offer_receive(struct wl_client *client, struct wl_resource *resource,
const char *mime_type, int32_t fd)
{
struct weston_data_offer *offer = wl_resource_get_user_data(resource);
if (offer->source && offer == offer->source->offer)
offer->source->send(offer->source, mime_type, fd);
else
close(fd);
}
static void
data_offer_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
data_source_notify_finish(struct weston_data_source *source)
{
if (!source->actions_set)
return;
if (source->offer->in_ask &&
wl_resource_get_version(source->resource) >=
WL_DATA_SOURCE_ACTION_SINCE_VERSION) {
wl_data_source_send_action(source->resource,
source->current_dnd_action);
}
if (wl_resource_get_version(source->resource) >=
WL_DATA_SOURCE_DND_FINISHED_SINCE_VERSION) {
wl_data_source_send_dnd_finished(source->resource);
}
source->offer = NULL;
}
static uint32_t
data_offer_choose_action(struct weston_data_offer *offer)
{
uint32_t available_actions, preferred_action = 0;
uint32_t source_actions, offer_actions;
if (wl_resource_get_version(offer->resource) >=
WL_DATA_OFFER_ACTION_SINCE_VERSION) {
offer_actions = offer->dnd_actions;
preferred_action = offer->preferred_dnd_action;
} else {
offer_actions = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
}
if (wl_resource_get_version(offer->source->resource) >=
WL_DATA_SOURCE_ACTION_SINCE_VERSION)
source_actions = offer->source->dnd_actions;
else
source_actions = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
available_actions = offer_actions & source_actions;
if (!available_actions)
return WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
if (offer->source->seat &&
offer->source->compositor_action & available_actions)
return offer->source->compositor_action;
/* If the dest side has a preferred DnD action, use it */
if ((preferred_action & available_actions) != 0)
return preferred_action;
/* Use the first found action, in bit order */
return 1 << (ffs(available_actions) - 1);
}
static void
data_offer_update_action(struct weston_data_offer *offer)
{
uint32_t action;
if (!offer->source)
return;
action = data_offer_choose_action(offer);
if (offer->source->current_dnd_action == action)
return;
offer->source->current_dnd_action = action;
if (offer->in_ask)
return;
if (wl_resource_get_version(offer->source->resource) >=
WL_DATA_SOURCE_ACTION_SINCE_VERSION)
wl_data_source_send_action(offer->source->resource, action);
if (wl_resource_get_version(offer->resource) >=
WL_DATA_OFFER_ACTION_SINCE_VERSION)
wl_data_offer_send_action(offer->resource, action);
}
static void
data_offer_set_actions(struct wl_client *client,
struct wl_resource *resource,
uint32_t dnd_actions, uint32_t preferred_action)
{
struct weston_data_offer *offer = wl_resource_get_user_data(resource);
if (dnd_actions & ~ALL_ACTIONS) {
wl_resource_post_error(offer->resource,
WL_DATA_OFFER_ERROR_INVALID_ACTION_MASK,
"invalid action mask %x", dnd_actions);
return;
}
if (preferred_action &&
(!(preferred_action & dnd_actions) ||
__builtin_popcount(preferred_action) > 1)) {
wl_resource_post_error(offer->resource,
WL_DATA_OFFER_ERROR_INVALID_ACTION,
"invalid action %x", preferred_action);
return;
}
offer->dnd_actions = dnd_actions;
offer->preferred_dnd_action = preferred_action;
data_offer_update_action(offer);
}
static void
data_offer_finish(struct wl_client *client, struct wl_resource *resource)
{
struct weston_data_offer *offer = wl_resource_get_user_data(resource);
if (!offer->source || offer->source->offer != offer)
return;
if (offer->source->set_selection) {
wl_resource_post_error(offer->resource,
WL_DATA_OFFER_ERROR_INVALID_FINISH,
"finish only valid for drag n drop");
return;
}
/* Disallow finish while we have a grab driving drag-and-drop, or
* if the negotiation is not at the right stage
*/
if (offer->source->seat ||
!offer->source->accepted) {
wl_resource_post_error(offer->resource,
WL_DATA_OFFER_ERROR_INVALID_FINISH,
"premature finish request");
return;
}
switch (offer->source->current_dnd_action) {
case WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE:
case WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK:
wl_resource_post_error(offer->resource,
WL_DATA_OFFER_ERROR_INVALID_OFFER,
"offer finished with an invalid action");
return;
default:
break;
}
data_source_notify_finish(offer->source);
}
static const struct wl_data_offer_interface data_offer_interface = {
data_offer_accept,
data_offer_receive,
data_offer_destroy,
data_offer_finish,
data_offer_set_actions,
};
static void
destroy_data_offer(struct wl_resource *resource)
{
struct weston_data_offer *offer = wl_resource_get_user_data(resource);
if (!offer->source)
goto out;
wl_list_remove(&offer->source_destroy_listener.link);
if (offer->source->offer != offer)
goto out;
/* If the drag destination has version < 3, wl_data_offer.finish
* won't be called, so do this here as a safety net, because
* we still want the version >=3 drag source to be happy.
*/
if (wl_resource_get_version(offer->resource) <
WL_DATA_OFFER_ACTION_SINCE_VERSION) {
data_source_notify_finish(offer->source);
} else if (offer->source->resource &&
wl_resource_get_version(offer->source->resource) >=
WL_DATA_SOURCE_DND_FINISHED_SINCE_VERSION) {
wl_data_source_send_cancelled(offer->source->resource);
}
offer->source->offer = NULL;
out:
free(offer);
}
static void
destroy_offer_data_source(struct wl_listener *listener, void *data)
{
struct weston_data_offer *offer;
offer = container_of(listener, struct weston_data_offer,
source_destroy_listener);
offer->source = NULL;
}
static struct weston_data_offer *
weston_data_source_send_offer(struct weston_data_source *source,
struct wl_resource *target)
{
struct weston_data_offer *offer;
char **p;
offer = malloc(sizeof *offer);
if (offer == NULL)
return NULL;
offer->resource =
wl_resource_create(wl_resource_get_client(target),
&wl_data_offer_interface,
wl_resource_get_version(target), 0);
if (offer->resource == NULL) {
free(offer);
return NULL;
}
wl_resource_set_implementation(offer->resource, &data_offer_interface,
offer, destroy_data_offer);
offer->in_ask = false;
offer->dnd_actions = 0;
offer->preferred_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
offer->source = source;
offer->source_destroy_listener.notify = destroy_offer_data_source;
wl_signal_add(&source->destroy_signal,
&offer->source_destroy_listener);
wl_data_device_send_data_offer(target, offer->resource);
wl_array_for_each(p, &source->mime_types)
wl_data_offer_send_offer(offer->resource, *p);
source->offer = offer;
source->accepted = false;
return offer;
}
static void
data_source_offer(struct wl_client *client,
struct wl_resource *resource,
const char *type)
{
struct weston_data_source *source =
wl_resource_get_user_data(resource);
char **p;
p = wl_array_add(&source->mime_types, sizeof *p);
if (p)
*p = strdup(type);
if (!p || !*p)
wl_resource_post_no_memory(resource);
}
static void
data_source_destroy(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static void
data_source_set_actions(struct wl_client *client,
struct wl_resource *resource,
uint32_t dnd_actions)
{
struct weston_data_source *source =
wl_resource_get_user_data(resource);
if (source->actions_set) {
wl_resource_post_error(source->resource,
WL_DATA_SOURCE_ERROR_INVALID_ACTION_MASK,
"cannot set actions more than once");
return;
}
if (dnd_actions & ~ALL_ACTIONS) {
wl_resource_post_error(source->resource,
WL_DATA_SOURCE_ERROR_INVALID_ACTION_MASK,
"invalid action mask %x", dnd_actions);
return;
}
if (source->seat) {
wl_resource_post_error(source->resource,
WL_DATA_SOURCE_ERROR_INVALID_ACTION_MASK,
"invalid action change after "
"wl_data_device.start_drag");
return;
}
source->dnd_actions = dnd_actions;
source->actions_set = true;
}
static const struct wl_data_source_interface data_source_interface = {
data_source_offer,
data_source_destroy,
data_source_set_actions
};
static void
drag_surface_configure(struct weston_drag *drag,
struct weston_pointer *pointer,
struct weston_touch *touch,
struct weston_surface *es,
int32_t sx, int32_t sy)
{
struct weston_layer_entry *list;
float fx, fy;
assert((pointer != NULL && touch == NULL) ||
(pointer == NULL && touch != NULL));
if (!weston_surface_is_mapped(es) && es->buffer_ref.buffer) {
if (pointer && pointer->sprite &&
weston_view_is_mapped(pointer->sprite))
list = &pointer->sprite->layer_link;
else
list = &es->compositor->cursor_layer.view_list;
weston_layer_entry_remove(&drag->icon->layer_link);
weston_layer_entry_insert(list, &drag->icon->layer_link);
weston_view_update_transform(drag->icon);
pixman_region32_clear(&es->pending.input);
es->is_mapped = true;
drag->icon->is_mapped = true;
}
drag->dx += sx;
drag->dy += sy;
/* init to 0 for avoiding a compile warning */
fx = fy = 0;
if (pointer) {
fx = wl_fixed_to_double(pointer->x) + drag->dx;
fy = wl_fixed_to_double(pointer->y) + drag->dy;
} else if (touch) {
fx = wl_fixed_to_double(touch->grab_x) + drag->dx;
fy = wl_fixed_to_double(touch->grab_y) + drag->dy;
}
weston_view_set_position(drag->icon, fx, fy);
}
static int
pointer_drag_surface_get_label(struct weston_surface *surface,
char *buf, size_t len)
{
return snprintf(buf, len, "pointer drag icon");
}
static void
pointer_drag_surface_committed(struct weston_surface *es,
int32_t sx, int32_t sy)
{
struct weston_pointer_drag *drag = es->committed_private;
struct weston_pointer *pointer = drag->grab.pointer;
assert(es->committed == pointer_drag_surface_committed);
drag_surface_configure(&drag->base, pointer, NULL, es, sx, sy);
}
static int
touch_drag_surface_get_label(struct weston_surface *surface,
char *buf, size_t len)
{
return snprintf(buf, len, "touch drag icon");
}
static void
touch_drag_surface_committed(struct weston_surface *es, int32_t sx, int32_t sy)
{
struct weston_touch_drag *drag = es->committed_private;
struct weston_touch *touch = drag->grab.touch;
assert(es->committed == touch_drag_surface_committed);
drag_surface_configure(&drag->base, NULL, touch, es, sx, sy);
}
static void
destroy_drag_focus(struct wl_listener *listener, void *data)
{
struct weston_drag *drag =
container_of(listener, struct weston_drag, focus_listener);
drag->focus_resource = NULL;
}
static void
weston_drag_set_focus(struct weston_drag *drag,
struct weston_seat *seat,
struct weston_view *view,
wl_fixed_t sx, wl_fixed_t sy)
{
struct wl_resource *resource, *offer_resource = NULL;
struct wl_display *display = seat->compositor->wl_display;
struct weston_data_offer *offer;
uint32_t serial;
if (drag->focus && view && drag->focus->surface == view->surface) {
drag->focus = view;
return;
}
if (drag->focus_resource) {
wl_data_device_send_leave(drag->focus_resource);
wl_list_remove(&drag->focus_listener.link);
drag->focus_resource = NULL;
drag->focus = NULL;
}
if (!view || !view->surface->resource)
return;
if (!drag->data_source &&
wl_resource_get_client(view->surface->resource) != drag->client)
return;
if (drag->data_source &&
drag->data_source->offer) {
/* Unlink the offer from the source */
offer = drag->data_source->offer;
offer->source = NULL;
drag->data_source->offer = NULL;
wl_list_remove(&offer->source_destroy_listener.link);
}
resource = wl_resource_find_for_client(&seat->drag_resource_list,
wl_resource_get_client(view->surface->resource));
if (!resource)
return;
serial = wl_display_next_serial(display);
if (drag->data_source) {
drag->data_source->accepted = false;
offer = weston_data_source_send_offer(drag->data_source, resource);
if (offer == NULL)
return;
data_offer_update_action(offer);
offer_resource = offer->resource;
if (wl_resource_get_version (offer_resource) >=
WL_DATA_OFFER_SOURCE_ACTIONS_SINCE_VERSION) {
wl_data_offer_send_source_actions (offer_resource,
drag->data_source->dnd_actions);
}
}
wl_data_device_send_enter(resource, serial, view->surface->resource,
sx, sy, offer_resource);
drag->focus = view;
drag->focus_listener.notify = destroy_drag_focus;
wl_resource_add_destroy_listener(resource, &drag->focus_listener);
drag->focus_resource = resource;
}
static void
drag_grab_focus(struct weston_pointer_grab *grab)
{
struct weston_pointer_drag *drag =
container_of(grab, struct weston_pointer_drag, grab);
struct weston_pointer *pointer = grab->pointer;
struct weston_view *view;
wl_fixed_t sx, sy;
view = weston_compositor_pick_view(pointer->seat->compositor,
pointer->x, pointer->y,
&sx, &sy);
if (drag->base.focus != view)
weston_drag_set_focus(&drag->base, pointer->seat, view, sx, sy);
}
static void
drag_grab_motion(struct weston_pointer_grab *grab,
const struct timespec *time,
struct weston_pointer_motion_event *event)
{
struct weston_pointer_drag *drag =
container_of(grab, struct weston_pointer_drag, grab);
struct weston_pointer *pointer = drag->grab.pointer;
float fx, fy;
wl_fixed_t sx, sy;
uint32_t msecs;
weston_pointer_move(pointer, event);
if (drag->base.icon) {
fx = wl_fixed_to_double(pointer->x) + drag->base.dx;
fy = wl_fixed_to_double(pointer->y) + drag->base.dy;
weston_view_set_position(drag->base.icon, fx, fy);
weston_view_schedule_repaint(drag->base.icon);
}
if (drag->base.focus_resource) {
msecs = timespec_to_msec(time);
weston_view_from_global_fixed(drag->base.focus,
pointer->x, pointer->y,
&sx, &sy);
wl_data_device_send_motion(drag->base.focus_resource, msecs, sx, sy);
}
}
static void
data_device_end_drag_grab(struct weston_drag *drag,
struct weston_seat *seat)
{
if (drag->icon) {
if (weston_view_is_mapped(drag->icon))
weston_view_unmap(drag->icon);
drag->icon->surface->committed = NULL;
weston_surface_set_label_func(drag->icon->surface, NULL);
pixman_region32_clear(&drag->icon->surface->pending.input);
wl_list_remove(&drag->icon_destroy_listener.link);
weston_view_destroy(drag->icon);
}
weston_drag_set_focus(drag, seat, NULL, 0, 0);
}
static void
data_device_end_pointer_drag_grab(struct weston_pointer_drag *drag)
{
struct weston_pointer *pointer = drag->grab.pointer;
struct weston_keyboard *keyboard = drag->base.keyboard_grab.keyboard;
data_device_end_drag_grab(&drag->base, pointer->seat);
weston_pointer_end_grab(pointer);
if (keyboard)
weston_keyboard_end_grab(keyboard);
free(drag);
}
static void
drag_grab_button(struct weston_pointer_grab *grab,
const struct timespec *time,
uint32_t button, uint32_t state_w)
{
struct weston_pointer_drag *drag =
container_of(grab, struct weston_pointer_drag, grab);
struct weston_pointer *pointer = drag->grab.pointer;
enum wl_pointer_button_state state = state_w;
struct weston_data_source *data_source = drag->base.data_source;
if (data_source &&
pointer->grab_button == button &&
state == WL_POINTER_BUTTON_STATE_RELEASED) {
if (drag->base.focus_resource &&
data_source->accepted &&
data_source->current_dnd_action) {
wl_data_device_send_drop(drag->base.focus_resource);
if (wl_resource_get_version(data_source->resource) >=
WL_DATA_SOURCE_DND_DROP_PERFORMED_SINCE_VERSION)
wl_data_source_send_dnd_drop_performed(data_source->resource);
data_source->offer->in_ask =
data_source->current_dnd_action ==
WL_DATA_DEVICE_MANAGER_DND_ACTION_ASK;
data_source->seat = NULL;
} else if (wl_resource_get_version(data_source->resource) >=
WL_DATA_SOURCE_DND_FINISHED_SINCE_VERSION) {
wl_data_source_send_cancelled(data_source->resource);
}
}
if (pointer->button_count == 0 &&
state == WL_POINTER_BUTTON_STATE_RELEASED) {
if (drag->base.data_source)
wl_list_remove(&drag->base.data_source_listener.link);
data_device_end_pointer_drag_grab(drag);
}
}
static void
drag_grab_axis(struct weston_pointer_grab *grab,
const struct timespec *time,
struct weston_pointer_axis_event *event)
{
}
static void
drag_grab_axis_source(struct weston_pointer_grab *grab, uint32_t source)
{
}
static void
drag_grab_frame(struct weston_pointer_grab *grab)
{
}
static void
drag_grab_cancel(struct weston_pointer_grab *grab)
{
struct weston_pointer_drag *drag =
container_of(grab, struct weston_pointer_drag, grab);
if (drag->base.data_source)
wl_list_remove(&drag->base.data_source_listener.link);
data_device_end_pointer_drag_grab(drag);
}
static const struct weston_pointer_grab_interface pointer_drag_grab_interface = {
drag_grab_focus,
drag_grab_motion,
drag_grab_button,
drag_grab_axis,
drag_grab_axis_source,
drag_grab_frame,
drag_grab_cancel,
};
static void
drag_grab_touch_down(struct weston_touch_grab *grab,
const struct timespec *time, int touch_id,
wl_fixed_t sx, wl_fixed_t sy)
{
}
static void
data_device_end_touch_drag_grab(struct weston_touch_drag *drag)
{
struct weston_touch *touch = drag->grab.touch;
struct weston_keyboard *keyboard = drag->base.keyboard_grab.keyboard;
data_device_end_drag_grab(&drag->base, touch->seat);
weston_touch_end_grab(touch);
if (keyboard)
weston_keyboard_end_grab(keyboard);
free(drag);
}
static void
drag_grab_touch_up(struct weston_touch_grab *grab,
const struct timespec *time, int touch_id)
{
struct weston_touch_drag *touch_drag =
container_of(grab, struct weston_touch_drag, grab);
struct weston_touch *touch = grab->touch;
if (touch_id != touch->grab_touch_id)
return;
if (touch_drag->base.focus_resource)
wl_data_device_send_drop(touch_drag->base.focus_resource);
if (touch_drag->base.data_source) {
touch_drag->base.data_source->seat = NULL;
wl_list_remove(&touch_drag->base.data_source_listener.link);
}
data_device_end_touch_drag_grab(touch_drag);
}
static void
drag_grab_touch_focus(struct weston_touch_drag *drag)
{
struct weston_touch *touch = drag->grab.touch;
struct weston_view *view;
wl_fixed_t view_x, view_y;
view = weston_compositor_pick_view(touch->seat->compositor,
touch->grab_x, touch->grab_y,
&view_x, &view_y);
if (drag->base.focus != view)
weston_drag_set_focus(&drag->base, touch->seat,
view, view_x, view_y);
}
static void
drag_grab_touch_motion(struct weston_touch_grab *grab,
const struct timespec *time,
int touch_id, wl_fixed_t x, wl_fixed_t y)
{
struct weston_touch_drag *touch_drag =
container_of(grab, struct weston_touch_drag, grab);
struct weston_touch *touch = grab->touch;
wl_fixed_t view_x, view_y;
float fx, fy;
uint32_t msecs;
if (touch_id != touch->grab_touch_id)
return;
drag_grab_touch_focus(touch_drag);
if (touch_drag->base.icon) {
fx = wl_fixed_to_double(touch->grab_x) + touch_drag->base.dx;
fy = wl_fixed_to_double(touch->grab_y) + touch_drag->base.dy;
weston_view_set_position(touch_drag->base.icon, fx, fy);
weston_view_schedule_repaint(touch_drag->base.icon);
}
if (touch_drag->base.focus_resource) {
msecs = timespec_to_msec(time);
weston_view_from_global_fixed(touch_drag->base.focus,
touch->grab_x, touch->grab_y,
&view_x, &view_y);
wl_data_device_send_motion(touch_drag->base.focus_resource,
msecs, view_x, view_y);
}
}
static void
drag_grab_touch_frame(struct weston_touch_grab *grab)
{
}
static void
drag_grab_touch_cancel(struct weston_touch_grab *grab)
{
struct weston_touch_drag *touch_drag =
container_of(grab, struct weston_touch_drag, grab);
if (touch_drag->base.data_source)
wl_list_remove(&touch_drag->base.data_source_listener.link);
data_device_end_touch_drag_grab(touch_drag);
}
static const struct weston_touch_grab_interface touch_drag_grab_interface = {
drag_grab_touch_down,
drag_grab_touch_up,
drag_grab_touch_motion,
drag_grab_touch_frame,
drag_grab_touch_cancel
};
static void
drag_grab_keyboard_key(struct weston_keyboard_grab *grab,
const struct timespec *time, uint32_t key, uint32_t state)
{
}
static void
drag_grab_keyboard_modifiers(struct weston_keyboard_grab *grab,
uint32_t serial, uint32_t mods_depressed,
uint32_t mods_latched,
uint32_t mods_locked, uint32_t group)
{
struct weston_keyboard *keyboard = grab->keyboard;
struct weston_drag *drag =
container_of(grab, struct weston_drag, keyboard_grab);
uint32_t compositor_action;
if (mods_depressed & (1 << keyboard->xkb_info->shift_mod))
compositor_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_MOVE;
else if (mods_depressed & (1 << keyboard->xkb_info->ctrl_mod))
compositor_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
else
compositor_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
drag->data_source->compositor_action = compositor_action;
if (drag->data_source->offer)
data_offer_update_action(drag->data_source->offer);
}
static void
drag_grab_keyboard_cancel(struct weston_keyboard_grab *grab)
{
struct weston_drag *drag =
container_of(grab, struct weston_drag, keyboard_grab);
struct weston_pointer *pointer = grab->keyboard->seat->pointer_state;
struct weston_touch *touch = grab->keyboard->seat->touch_state;
if (pointer && pointer->grab->interface == &pointer_drag_grab_interface) {
struct weston_touch_drag *touch_drag =
(struct weston_touch_drag *) drag;
drag_grab_touch_cancel(&touch_drag->grab);
} else if (touch && touch->grab->interface == &touch_drag_grab_interface) {
struct weston_pointer_drag *pointer_drag =
(struct weston_pointer_drag *) drag;
drag_grab_cancel(&pointer_drag->grab);
}
}
static const struct weston_keyboard_grab_interface keyboard_drag_grab_interface = {
drag_grab_keyboard_key,
drag_grab_keyboard_modifiers,
drag_grab_keyboard_cancel
};
static void
destroy_pointer_data_device_source(struct wl_listener *listener, void *data)
{
struct weston_pointer_drag *drag = container_of(listener,
struct weston_pointer_drag, base.data_source_listener);
data_device_end_pointer_drag_grab(drag);
}
static void
handle_drag_icon_destroy(struct wl_listener *listener, void *data)
{
struct weston_drag *drag = container_of(listener, struct weston_drag,
icon_destroy_listener);
drag->icon = NULL;
}
WL_EXPORT int
weston_pointer_start_drag(struct weston_pointer *pointer,
struct weston_data_source *source,
struct weston_surface *icon,
struct wl_client *client)
{
struct weston_pointer_drag *drag;
struct weston_keyboard *keyboard =
weston_seat_get_keyboard(pointer->seat);
drag = zalloc(sizeof *drag);
if (drag == NULL)
return -1;
drag->grab.interface = &pointer_drag_grab_interface;
drag->base.keyboard_grab.interface = &keyboard_drag_grab_interface;
drag->base.client = client;
drag->base.data_source = source;
if (icon) {
drag->base.icon = weston_view_create(icon);
if (drag->base.icon == NULL) {
free(drag);
return -1;
}
drag->base.icon_destroy_listener.notify = handle_drag_icon_destroy;
wl_signal_add(&icon->destroy_signal,
&drag->base.icon_destroy_listener);
icon->committed = pointer_drag_surface_committed;
icon->committed_private = drag;
weston_surface_set_label_func(icon,
pointer_drag_surface_get_label);
} else {
drag->base.icon = NULL;
}
if (source) {
drag->base.data_source_listener.notify = destroy_pointer_data_device_source;
wl_signal_add(&source->destroy_signal,
&drag->base.data_source_listener);
}
weston_pointer_clear_focus(pointer);
if (keyboard)
weston_keyboard_set_focus(keyboard, NULL);
weston_pointer_start_grab(pointer, &drag->grab);
if (keyboard)
weston_keyboard_start_grab(keyboard, &drag->base.keyboard_grab);
return 0;
}
static void
destroy_touch_data_device_source(struct wl_listener *listener, void *data)
{
struct weston_touch_drag *drag = container_of(listener,
struct weston_touch_drag, base.data_source_listener);
data_device_end_touch_drag_grab(drag);
}
WL_EXPORT int
weston_touch_start_drag(struct weston_touch *touch,
struct weston_data_source *source,
struct weston_surface *icon,
struct wl_client *client)
{
struct weston_touch_drag *drag;
struct weston_keyboard *keyboard =
weston_seat_get_keyboard(touch->seat);
drag = zalloc(sizeof *drag);
if (drag == NULL)
return -1;
drag->grab.interface = &touch_drag_grab_interface;
drag->base.client = client;
drag->base.data_source = source;
if (icon) {
drag->base.icon = weston_view_create(icon);
if (drag->base.icon == NULL) {
free(drag);
return -1;
}
drag->base.icon_destroy_listener.notify = handle_drag_icon_destroy;
wl_signal_add(&icon->destroy_signal,
&drag->base.icon_destroy_listener);
icon->committed = touch_drag_surface_committed;
icon->committed_private = drag;
weston_surface_set_label_func(icon,
touch_drag_surface_get_label);
} else {
drag->base.icon = NULL;
}
if (source) {
drag->base.data_source_listener.notify = destroy_touch_data_device_source;
wl_signal_add(&source->destroy_signal,
&drag->base.data_source_listener);
}
if (keyboard)
weston_keyboard_set_focus(keyboard, NULL);
weston_touch_start_grab(touch, &drag->grab);
if (keyboard)
weston_keyboard_start_grab(keyboard, &drag->base.keyboard_grab);
drag_grab_touch_focus(drag);
return 0;
}
static void
data_device_start_drag(struct wl_client *client, struct wl_resource *resource,
struct wl_resource *source_resource,
struct wl_resource *origin_resource,
struct wl_resource *icon_resource, uint32_t serial)
{
struct weston_seat *seat = wl_resource_get_user_data(resource);
struct weston_pointer *pointer = weston_seat_get_pointer(seat);
struct weston_touch *touch = weston_seat_get_touch(seat);
struct weston_surface *origin = wl_resource_get_user_data(origin_resource);
struct weston_data_source *source = NULL;
struct weston_surface *icon = NULL;
int is_pointer_grab, is_touch_grab;
int32_t ret = 0;
is_pointer_grab = pointer &&
pointer->button_count == 1 &&
pointer->grab_serial == serial &&
pointer->focus &&
pointer->focus->surface == origin;
is_touch_grab = touch &&
touch->num_tp == 1 &&
touch->grab_serial == serial &&
touch->focus &&
touch->focus->surface == origin;
/* FIXME: Check that the data source type array isn't empty. */
if (source_resource)
source = wl_resource_get_user_data(source_resource);
if (!is_pointer_grab && !is_touch_grab) {
if (source)
wl_data_source_send_cancelled(source->resource);
return;
}
if (icon_resource)
icon = wl_resource_get_user_data(icon_resource);
if (icon) {
if (weston_surface_set_role(icon, "wl_data_device-icon",
resource,
WL_DATA_DEVICE_ERROR_ROLE) < 0)
return;
}
if (is_pointer_grab)
ret = weston_pointer_start_drag(pointer, source, icon, client);
else if (is_touch_grab)
ret = weston_touch_start_drag(touch, source, icon, client);
if (ret < 0)
wl_resource_post_no_memory(resource);
else
source->seat = seat;
}
static void
destroy_selection_data_source(struct wl_listener *listener, void *data)
{
struct weston_seat *seat = container_of(listener, struct weston_seat,
selection_data_source_listener);
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
struct wl_resource *data_device;
struct weston_surface *focus = NULL;
seat->selection_data_source = NULL;
if (keyboard)
focus = keyboard->focus;
if (focus && focus->resource) {
data_device = wl_resource_find_for_client(&seat->drag_resource_list,
wl_resource_get_client(focus->resource));
if (data_device)
wl_data_device_send_selection(data_device, NULL);
}
wl_signal_emit(&seat->selection_signal, seat);
}
/** \brief Send the selection to the specified client
*
* This function creates a new wl_data_offer if there is a wl_data_source
* currently set as the selection and sends it to the specified client,
* followed by the wl_data_device.selection() event.
* If there is no current selection the wl_data_device.selection() event
* will carry a NULL wl_data_offer.
*
* If the client does not have a wl_data_device for the specified seat
* nothing will be done.
*
* \param seat The seat owning the wl_data_device used to send the events.
* \param client The client to which to send the selection.
*/
WL_EXPORT void
weston_seat_send_selection(struct weston_seat *seat, struct wl_client *client)
{
struct weston_data_offer *offer;
struct wl_resource *data_device;
wl_resource_for_each(data_device, &seat->drag_resource_list) {
if (wl_resource_get_client(data_device) != client)
continue;
if (seat->selection_data_source) {
offer = weston_data_source_send_offer(seat->selection_data_source,
data_device);
wl_data_device_send_selection(data_device, offer->resource);
} else {
wl_data_device_send_selection(data_device, NULL);
}
}
}
WL_EXPORT void
weston_seat_set_selection(struct weston_seat *seat,
struct weston_data_source *source, uint32_t serial)
{
struct weston_surface *focus = NULL;
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
if (seat->selection_data_source &&
seat->selection_serial - serial < UINT32_MAX / 2)
return;
if (seat->selection_data_source) {
seat->selection_data_source->cancel(seat->selection_data_source);
wl_list_remove(&seat->selection_data_source_listener.link);
seat->selection_data_source = NULL;
}
seat->selection_data_source = source;
seat->selection_serial = serial;
if (source)
source->set_selection = true;
if (keyboard)
focus = keyboard->focus;
if (focus && focus->resource) {
weston_seat_send_selection(seat, wl_resource_get_client(focus->resource));
}
wl_signal_emit(&seat->selection_signal, seat);
if (source) {
seat->selection_data_source_listener.notify =
destroy_selection_data_source;
wl_signal_add(&source->destroy_signal,
&seat->selection_data_source_listener);
}
}
static void
data_device_set_selection(struct wl_client *client,
struct wl_resource *resource,
struct wl_resource *source_resource, uint32_t serial)
{
struct weston_seat *seat = wl_resource_get_user_data(resource);
struct weston_data_source *source;
if (!seat || !source_resource)
return;
source = wl_resource_get_user_data(source_resource);
if (source->actions_set) {
wl_resource_post_error(source_resource,
WL_DATA_SOURCE_ERROR_INVALID_SOURCE,
"cannot set drag-and-drop source as selection");
return;
}
/* FIXME: Store serial and check against incoming serial here. */
weston_seat_set_selection(seat, source, serial);
}
static void
data_device_release(struct wl_client *client, struct wl_resource *resource)
{
wl_resource_destroy(resource);
}
static const struct wl_data_device_interface data_device_interface = {
data_device_start_drag,
data_device_set_selection,
data_device_release
};
static void
destroy_data_source(struct wl_resource *resource)
{
struct weston_data_source *source =
wl_resource_get_user_data(resource);
char **p;
wl_signal_emit(&source->destroy_signal, source);
wl_array_for_each(p, &source->mime_types)
free(*p);
wl_array_release(&source->mime_types);
free(source);
}
static void
client_source_accept(struct weston_data_source *source,
uint32_t time, const char *mime_type)
{
wl_data_source_send_target(source->resource, mime_type);
}
static void
client_source_send(struct weston_data_source *source,
const char *mime_type, int32_t fd)
{
wl_data_source_send_send(source->resource, mime_type, fd);
close(fd);
}
static void
client_source_cancel(struct weston_data_source *source)
{
wl_data_source_send_cancelled(source->resource);
}
static void
create_data_source(struct wl_client *client,
struct wl_resource *resource, uint32_t id)
{
struct weston_data_source *source;
source = malloc(sizeof *source);
if (source == NULL) {
wl_resource_post_no_memory(resource);
return;
}
source->resource =
wl_resource_create(client, &wl_data_source_interface,
wl_resource_get_version(resource), id);
if (source->resource == NULL) {
free(source);
wl_resource_post_no_memory(resource);
return;
}
wl_signal_init(&source->destroy_signal);
source->accept = client_source_accept;
source->send = client_source_send;
source->cancel = client_source_cancel;
source->offer = NULL;
source->accepted = false;
source->seat = NULL;
source->actions_set = false;
source->dnd_actions = 0;
source->current_dnd_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
source->compositor_action = WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
source->set_selection = false;
wl_array_init(&source->mime_types);
wl_resource_set_implementation(source->resource, &data_source_interface,
source, destroy_data_source);
}
static void unbind_data_device(struct wl_resource *resource)
{
wl_list_remove(wl_resource_get_link(resource));
}
static void
get_data_device(struct wl_client *client,
struct wl_resource *manager_resource,
uint32_t id, struct wl_resource *seat_resource)
{
struct weston_seat *seat = wl_resource_get_user_data(seat_resource);
struct wl_resource *resource;
resource = wl_resource_create(client,
&wl_data_device_interface,
wl_resource_get_version(manager_resource),
id);
if (resource == NULL) {
wl_resource_post_no_memory(manager_resource);
return;
}
if (seat) {
wl_list_insert(&seat->drag_resource_list,
wl_resource_get_link(resource));
} else {
wl_list_init(wl_resource_get_link(resource));
}
wl_resource_set_implementation(resource, &data_device_interface,
seat, unbind_data_device);
}
static const struct wl_data_device_manager_interface manager_interface = {
create_data_source,
get_data_device
};
static void
bind_manager(struct wl_client *client,
void *data, uint32_t version, uint32_t id)
{
struct wl_resource *resource;
resource = wl_resource_create(client,
&wl_data_device_manager_interface,
version, id);
if (resource == NULL) {
wl_client_post_no_memory(client);
return;
}
wl_resource_set_implementation(resource, &manager_interface,
NULL, NULL);
}
WL_EXPORT void
wl_data_device_set_keyboard_focus(struct weston_seat *seat)
{
struct weston_surface *focus;
struct weston_keyboard *keyboard = weston_seat_get_keyboard(seat);
if (!keyboard)
return;
focus = keyboard->focus;
if (!focus || !focus->resource)
return;
weston_seat_send_selection(seat, wl_resource_get_client(focus->resource));
}
WL_EXPORT int
wl_data_device_manager_init(struct wl_display *display)
{
if (wl_global_create(display,
&wl_data_device_manager_interface, 3,
NULL, bind_manager) == NULL)
return -1;
return 0;
}