2018-05-02 10:07:22 +02:00
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#define _XOPEN_SOURCE 700
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#include <assert.h>
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#include <stdlib.h>
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#include <strings.h>
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#include <unistd.h>
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#include <wayland-server.h>
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#include <wlr/types/wlr_data_device.h>
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#include <wlr/types/wlr_seat.h>
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#include <wlr/util/log.h>
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#include "types/wlr_data_device.h"
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#include "util/signal.h"
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static const struct wl_data_offer_interface data_offer_impl;
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static struct wlr_data_offer *data_offer_from_resource(
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struct wl_resource *resource) {
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assert(wl_resource_instance_of(resource, &wl_data_offer_interface,
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&data_offer_impl));
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return wl_resource_get_user_data(resource);
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}
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static uint32_t data_offer_choose_action(struct wlr_data_offer *offer) {
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uint32_t offer_actions, preferred_action = 0;
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if (wl_resource_get_version(offer->resource) >=
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WL_DATA_OFFER_ACTION_SINCE_VERSION) {
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offer_actions = offer->actions;
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preferred_action = offer->preferred_action;
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} else {
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offer_actions = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
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}
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uint32_t source_actions;
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if (offer->source->actions >= 0) {
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source_actions = offer->source->actions;
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} else {
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source_actions = WL_DATA_DEVICE_MANAGER_DND_ACTION_COPY;
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}
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uint32_t available_actions = offer_actions & source_actions;
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if (!available_actions) {
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return WL_DATA_DEVICE_MANAGER_DND_ACTION_NONE;
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}
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if (offer->source->seat_client &&
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offer->source->compositor_action & available_actions) {
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return offer->source->compositor_action;
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}
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// If the dest side has a preferred DnD action, use it
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if ((preferred_action & available_actions) != 0) {
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return preferred_action;
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}
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// Use the first found action, in bit order
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return 1 << (ffs(available_actions) - 1);
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}
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void data_offer_update_action(struct wlr_data_offer *offer) {
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if (!offer->source) {
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return;
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}
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uint32_t action = data_offer_choose_action(offer);
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if (offer->source->current_dnd_action == action) {
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return;
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}
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offer->source->current_dnd_action = action;
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if (offer->in_ask) {
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return;
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}
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wlr_data_source_dnd_action(offer->source, action);
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if (wl_resource_get_version(offer->resource) >=
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WL_DATA_OFFER_ACTION_SINCE_VERSION) {
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wl_data_offer_send_action(offer->resource, action);
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}
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}
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static void data_offer_accept(struct wl_client *client,
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struct wl_resource *resource, uint32_t serial, const char *mime_type) {
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struct wlr_data_offer *offer = data_offer_from_resource(resource);
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if (!offer->source || offer != offer->source->offer) {
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return;
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}
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// TODO check that client is currently focused by the input device
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wlr_data_source_accept(offer->source, serial, mime_type);
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}
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static void data_offer_receive(struct wl_client *client,
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struct wl_resource *resource, const char *mime_type, int32_t fd) {
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struct wlr_data_offer *offer = data_offer_from_resource(resource);
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if (offer->source && offer == offer->source->offer) {
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wlr_data_source_send(offer->source, mime_type, fd);
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} else {
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close(fd);
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}
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}
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static void data_offer_destroy(struct wl_client *client,
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struct wl_resource *resource) {
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wl_resource_destroy(resource);
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}
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static void data_offer_finish(struct wl_client *client,
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struct wl_resource *resource) {
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struct wlr_data_offer *offer = data_offer_from_resource(resource);
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if (!offer->source || offer->source->offer != offer) {
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return;
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}
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data_source_notify_finish(offer->source);
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}
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static void data_offer_set_actions(struct wl_client *client,
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struct wl_resource *resource, uint32_t actions,
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uint32_t preferred_action) {
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struct wlr_data_offer *offer = data_offer_from_resource(resource);
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if (actions & ~DATA_DEVICE_ALL_ACTIONS) {
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wl_resource_post_error(offer->resource,
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WL_DATA_OFFER_ERROR_INVALID_ACTION_MASK,
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"invalid action mask %x", actions);
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return;
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}
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if (preferred_action && (!(preferred_action & actions) ||
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__builtin_popcount(preferred_action) > 1)) {
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wl_resource_post_error(offer->resource,
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WL_DATA_OFFER_ERROR_INVALID_ACTION,
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"invalid action %x", preferred_action);
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return;
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}
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offer->actions = actions;
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offer->preferred_action = preferred_action;
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data_offer_update_action(offer);
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}
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2018-05-03 21:22:51 +02:00
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static void data_offer_handle_resource_destroy(struct wl_resource *resource) {
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2018-05-02 10:07:22 +02:00
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struct wlr_data_offer *offer = data_offer_from_resource(resource);
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if (!offer->source) {
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goto out;
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}
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wl_list_remove(&offer->source_destroy.link);
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if (offer->source->offer != offer) {
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goto out;
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}
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// If the drag destination has version < 3, wl_data_offer.finish
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// won't be called, so do this here as a safety net, because
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// we still want the version >= 3 drag source to be happy.
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if (wl_resource_get_version(offer->resource) <
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WL_DATA_OFFER_ACTION_SINCE_VERSION) {
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data_source_notify_finish(offer->source);
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offer->source->offer = NULL;
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} else if (offer->source->impl->dnd_finish) {
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// source->cancel can free the source
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offer->source->offer = NULL;
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wlr_data_source_cancel(offer->source);
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} else {
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offer->source->offer = NULL;
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}
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out:
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free(offer);
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}
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static const struct wl_data_offer_interface data_offer_impl = {
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.accept = data_offer_accept,
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.receive = data_offer_receive,
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.destroy = data_offer_destroy,
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.finish = data_offer_finish,
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.set_actions = data_offer_set_actions,
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};
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static void handle_offer_source_destroyed(struct wl_listener *listener,
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void *data) {
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struct wlr_data_offer *offer =
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wl_container_of(listener, offer, source_destroy);
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offer->source = NULL;
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}
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struct wlr_data_offer *data_offer_create(struct wl_client *client,
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struct wlr_data_source *source, uint32_t version) {
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struct wlr_data_offer *offer = calloc(1, sizeof(struct wlr_data_offer));
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if (offer == NULL) {
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return NULL;
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}
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offer->source = source;
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offer->resource = wl_resource_create(client,
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&wl_data_offer_interface, version, 0);
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if (offer->resource == NULL) {
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free(offer);
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return NULL;
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}
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wl_resource_set_implementation(offer->resource, &data_offer_impl, offer,
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2018-05-03 21:22:51 +02:00
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data_offer_handle_resource_destroy);
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2018-05-02 10:07:22 +02:00
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offer->source_destroy.notify = handle_offer_source_destroyed;
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wl_signal_add(&source->events.destroy, &offer->source_destroy);
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return offer;
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}
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