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weston/libweston/data-device.c

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37 KiB

/*
* 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) && weston_surface_has_content(es)) {
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);
weston_surface_map(es);
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 serial, 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;
}