533 lines
15 KiB
C
533 lines
15 KiB
C
#include <assert.h>
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#include <stdlib.h>
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#include <string.h>
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#include <strings.h>
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#include <unistd.h>
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#include <wayland-server-core.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 void drag_handle_seat_client_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_drag *drag =
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wl_container_of(listener, drag, seat_client_destroy);
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drag->focus_client = NULL;
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wl_list_remove(&drag->seat_client_destroy.link);
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}
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static void drag_set_focus(struct wlr_drag *drag,
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struct wlr_surface *surface, double sx, double sy) {
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if (drag->focus == surface) {
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return;
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}
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if (drag->focus_client) {
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wl_list_remove(&drag->seat_client_destroy.link);
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// If we're switching focus to another client, we want to destroy all
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// offers without destroying the source. If the drag operation ends, we
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// want to keep the offer around for the data transfer.
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struct wlr_data_offer *offer, *tmp;
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wl_list_for_each_safe(offer, tmp,
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&drag->focus_client->seat->drag_offers, link) {
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struct wl_client *client = wl_resource_get_client(offer->resource);
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if (!drag->dropped && offer->source == drag->source &&
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client == drag->focus_client->client) {
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offer->source = NULL;
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data_offer_destroy(offer);
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}
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}
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struct wl_resource *resource;
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wl_resource_for_each(resource, &drag->focus_client->data_devices) {
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wl_data_device_send_leave(resource);
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}
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drag->focus_client = NULL;
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drag->focus = NULL;
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}
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if (!surface) {
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goto out;
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}
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if (!drag->source &&
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wl_resource_get_client(surface->resource) !=
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drag->seat_client->client) {
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goto out;
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}
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struct wlr_seat_client *focus_client = wlr_seat_client_for_wl_client(
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drag->seat_client->seat, wl_resource_get_client(surface->resource));
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if (!focus_client) {
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goto out;
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}
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if (drag->source != NULL) {
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drag->source->accepted = false;
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uint32_t serial =
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wl_display_next_serial(drag->seat_client->seat->display);
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struct wl_resource *device_resource;
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wl_resource_for_each(device_resource, &focus_client->data_devices) {
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struct wlr_data_offer *offer = data_offer_create(device_resource,
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drag->source, WLR_DATA_OFFER_DRAG);
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if (offer == NULL) {
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wl_resource_post_no_memory(device_resource);
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return;
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}
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data_offer_update_action(offer);
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if (wl_resource_get_version(offer->resource) >=
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WL_DATA_OFFER_SOURCE_ACTIONS_SINCE_VERSION) {
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wl_data_offer_send_source_actions(offer->resource,
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drag->source->actions);
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}
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wl_data_device_send_enter(device_resource, serial,
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surface->resource,
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wl_fixed_from_double(sx), wl_fixed_from_double(sy),
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offer->resource);
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}
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}
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drag->focus = surface;
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drag->focus_client = focus_client;
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drag->seat_client_destroy.notify = drag_handle_seat_client_destroy;
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wl_signal_add(&focus_client->events.destroy, &drag->seat_client_destroy);
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out:
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wlr_signal_emit_safe(&drag->events.focus, drag);
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}
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static void drag_icon_set_mapped(struct wlr_drag_icon *icon, bool mapped) {
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if (mapped && !icon->mapped) {
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icon->mapped = true;
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wlr_signal_emit_safe(&icon->events.map, icon);
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} else if (!mapped && icon->mapped) {
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wlr_signal_emit_safe(&icon->events.unmap, icon);
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icon->mapped = false;
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}
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}
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static void drag_icon_destroy(struct wlr_drag_icon *icon);
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static void drag_destroy(struct wlr_drag *drag) {
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if (drag->cancelling) {
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return;
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}
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drag->cancelling = true;
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if (drag->started) {
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wlr_seat_keyboard_end_grab(drag->seat);
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switch (drag->grab_type) {
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case WLR_DRAG_GRAB_KEYBOARD:
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break;
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case WLR_DRAG_GRAB_KEYBOARD_POINTER:
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wlr_seat_pointer_end_grab(drag->seat);
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break;
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case WLR_DRAG_GRAB_KEYBOARD_TOUCH:
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wlr_seat_touch_end_grab(drag->seat);
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break;
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}
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}
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// We issue destroy after ending the grab to allow focus changes.
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wlr_signal_emit_safe(&drag->events.destroy, drag);
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if (drag->started) {
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drag_set_focus(drag, NULL, 0, 0);
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assert(drag->seat->drag == drag);
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drag->seat->drag = NULL;
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}
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if (drag->source) {
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wl_list_remove(&drag->source_destroy.link);
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}
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drag_icon_destroy(drag->icon);
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free(drag);
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}
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static void drag_handle_pointer_enter(struct wlr_seat_pointer_grab *grab,
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struct wlr_surface *surface, double sx, double sy) {
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struct wlr_drag *drag = grab->data;
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drag_set_focus(drag, surface, sx, sy);
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}
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static void drag_handle_pointer_clear_focus(struct wlr_seat_pointer_grab *grab) {
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struct wlr_drag *drag = grab->data;
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drag_set_focus(drag, NULL, 0, 0);
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}
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static void drag_handle_pointer_motion(struct wlr_seat_pointer_grab *grab,
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uint32_t time, double sx, double sy) {
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struct wlr_drag *drag = grab->data;
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if (drag->focus != NULL && drag->focus_client != NULL) {
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struct wl_resource *resource;
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wl_resource_for_each(resource, &drag->focus_client->data_devices) {
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wl_data_device_send_motion(resource, time, wl_fixed_from_double(sx),
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wl_fixed_from_double(sy));
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}
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struct wlr_drag_motion_event event = {
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.drag = drag,
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.time = time,
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.sx = sx,
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.sy = sy,
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};
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wlr_signal_emit_safe(&drag->events.motion, &event);
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}
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}
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static void drag_drop(struct wlr_drag *drag, uint32_t time) {
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assert(drag->focus_client);
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drag->dropped = true;
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struct wl_resource *resource;
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wl_resource_for_each(resource, &drag->focus_client->data_devices) {
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wl_data_device_send_drop(resource);
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}
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if (drag->source) {
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wlr_data_source_dnd_drop(drag->source);
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}
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struct wlr_drag_drop_event event = {
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.drag = drag,
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.time = time,
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};
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wlr_signal_emit_safe(&drag->events.drop, &event);
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}
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static uint32_t drag_handle_pointer_button(struct wlr_seat_pointer_grab *grab,
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uint32_t time, uint32_t button, uint32_t state) {
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struct wlr_drag *drag = grab->data;
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if (drag->source &&
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grab->seat->pointer_state.grab_button == button &&
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state == WL_POINTER_BUTTON_STATE_RELEASED) {
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if (drag->focus_client && drag->source->current_dnd_action &&
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drag->source->accepted) {
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drag_drop(drag, time);
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} else if (drag->source->impl->dnd_finish) {
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// This will end the grab and free `drag`
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wlr_data_source_destroy(drag->source);
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return 0;
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}
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}
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if (grab->seat->pointer_state.button_count == 0 &&
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state == WL_POINTER_BUTTON_STATE_RELEASED) {
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drag_destroy(drag);
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}
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return 0;
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}
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static void drag_handle_pointer_axis(struct wlr_seat_pointer_grab *grab,
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uint32_t time, enum wlr_axis_orientation orientation, double value,
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int32_t value_discrete, enum wlr_axis_source source) {
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// This space is intentionally left blank
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}
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static void drag_handle_pointer_cancel(struct wlr_seat_pointer_grab *grab) {
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struct wlr_drag *drag = grab->data;
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drag_destroy(drag);
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}
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static const struct wlr_pointer_grab_interface
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data_device_pointer_drag_interface = {
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.enter = drag_handle_pointer_enter,
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.clear_focus = drag_handle_pointer_clear_focus,
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.motion = drag_handle_pointer_motion,
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.button = drag_handle_pointer_button,
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.axis = drag_handle_pointer_axis,
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.cancel = drag_handle_pointer_cancel,
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};
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static uint32_t drag_handle_touch_down(struct wlr_seat_touch_grab *grab,
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uint32_t time, struct wlr_touch_point *point) {
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// eat the event
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return 0;
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}
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static void drag_handle_touch_up(struct wlr_seat_touch_grab *grab,
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uint32_t time, struct wlr_touch_point *point) {
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struct wlr_drag *drag = grab->data;
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if (drag->grab_touch_id != point->touch_id) {
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return;
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}
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if (drag->focus_client) {
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drag_drop(drag, time);
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}
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drag_destroy(drag);
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}
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static void drag_handle_touch_motion(struct wlr_seat_touch_grab *grab,
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uint32_t time, struct wlr_touch_point *point) {
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struct wlr_drag *drag = grab->data;
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if (drag->focus && drag->focus_client) {
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struct wl_resource *resource;
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wl_resource_for_each(resource, &drag->focus_client->data_devices) {
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wl_data_device_send_motion(resource, time,
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wl_fixed_from_double(point->sx),
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wl_fixed_from_double(point->sy));
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}
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}
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}
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static void drag_handle_touch_enter(struct wlr_seat_touch_grab *grab,
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uint32_t time, struct wlr_touch_point *point) {
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struct wlr_drag *drag = grab->data;
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drag_set_focus(drag, point->focus_surface, point->sx, point->sy);
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}
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static void drag_handle_touch_cancel(struct wlr_seat_touch_grab *grab) {
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struct wlr_drag *drag = grab->data;
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drag_destroy(drag);
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}
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static const struct wlr_touch_grab_interface
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data_device_touch_drag_interface = {
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.down = drag_handle_touch_down,
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.up = drag_handle_touch_up,
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.motion = drag_handle_touch_motion,
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.enter = drag_handle_touch_enter,
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.cancel = drag_handle_touch_cancel,
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};
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static void drag_handle_keyboard_enter(struct wlr_seat_keyboard_grab *grab,
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struct wlr_surface *surface, uint32_t keycodes[], size_t num_keycodes,
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struct wlr_keyboard_modifiers *modifiers) {
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// nothing has keyboard focus during drags
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}
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static void drag_handle_keyboard_clear_focus(struct wlr_seat_keyboard_grab *grab) {
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// nothing has keyboard focus during drags
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}
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static void drag_handle_keyboard_key(struct wlr_seat_keyboard_grab *grab,
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uint32_t time, uint32_t key, uint32_t state) {
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// no keyboard input during drags
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}
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static void drag_handle_keyboard_modifiers(struct wlr_seat_keyboard_grab *grab,
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struct wlr_keyboard_modifiers *modifiers) {
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//struct wlr_keyboard *keyboard = grab->seat->keyboard_state.keyboard;
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// TODO change the dnd action based on what modifier is pressed on the
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// keyboard
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}
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static void drag_handle_keyboard_cancel(struct wlr_seat_keyboard_grab *grab) {
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struct wlr_drag *drag = grab->data;
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drag_destroy(drag);
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}
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static const struct wlr_keyboard_grab_interface
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data_device_keyboard_drag_interface = {
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.enter = drag_handle_keyboard_enter,
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.clear_focus = drag_handle_keyboard_clear_focus,
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.key = drag_handle_keyboard_key,
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.modifiers = drag_handle_keyboard_modifiers,
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.cancel = drag_handle_keyboard_cancel,
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};
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static void drag_handle_icon_destroy(struct wl_listener *listener, void *data) {
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struct wlr_drag *drag = wl_container_of(listener, drag, icon_destroy);
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drag->icon = NULL;
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}
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static void drag_handle_drag_source_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_drag *drag = wl_container_of(listener, drag, source_destroy);
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drag_destroy(drag);
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}
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static void drag_icon_destroy(struct wlr_drag_icon *icon) {
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if (icon == NULL) {
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return;
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}
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drag_icon_set_mapped(icon, false);
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wlr_signal_emit_safe(&icon->events.destroy, icon);
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icon->surface->role_data = NULL;
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wl_list_remove(&icon->surface_destroy.link);
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free(icon);
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}
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static void drag_icon_handle_surface_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_drag_icon *icon =
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wl_container_of(listener, icon, surface_destroy);
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drag_icon_destroy(icon);
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}
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static void drag_icon_surface_role_commit(struct wlr_surface *surface) {
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assert(surface->role == &drag_icon_surface_role);
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struct wlr_drag_icon *icon = surface->role_data;
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if (icon == NULL) {
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return;
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}
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drag_icon_set_mapped(icon, wlr_surface_has_buffer(surface));
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}
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const struct wlr_surface_role drag_icon_surface_role = {
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.name = "wl_data_device-icon",
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.commit = drag_icon_surface_role_commit,
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};
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static struct wlr_drag_icon *drag_icon_create(struct wlr_drag *drag,
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struct wlr_surface *surface) {
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struct wlr_drag_icon *icon = calloc(1, sizeof(struct wlr_drag_icon));
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if (!icon) {
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return NULL;
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}
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icon->drag = drag;
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icon->surface = surface;
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wl_signal_init(&icon->events.map);
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wl_signal_init(&icon->events.unmap);
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wl_signal_init(&icon->events.destroy);
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wl_signal_add(&icon->surface->events.destroy, &icon->surface_destroy);
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icon->surface_destroy.notify = drag_icon_handle_surface_destroy;
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icon->surface->role_data = icon;
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if (wlr_surface_has_buffer(surface)) {
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drag_icon_set_mapped(icon, true);
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}
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return icon;
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}
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struct wlr_drag *wlr_drag_create(struct wlr_seat_client *seat_client,
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struct wlr_data_source *source, struct wlr_surface *icon_surface) {
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struct wlr_drag *drag = calloc(1, sizeof(struct wlr_drag));
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if (drag == NULL) {
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return NULL;
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}
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wl_signal_init(&drag->events.focus);
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wl_signal_init(&drag->events.motion);
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wl_signal_init(&drag->events.drop);
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wl_signal_init(&drag->events.destroy);
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drag->seat = seat_client->seat;
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drag->seat_client = seat_client;
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if (icon_surface) {
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struct wlr_drag_icon *icon = drag_icon_create(drag, icon_surface);
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if (icon == NULL) {
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free(drag);
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return NULL;
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}
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drag->icon = icon;
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drag->icon_destroy.notify = drag_handle_icon_destroy;
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wl_signal_add(&icon->events.destroy, &drag->icon_destroy);
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}
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drag->source = source;
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if (source != NULL) {
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drag->source_destroy.notify = drag_handle_drag_source_destroy;
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wl_signal_add(&source->events.destroy, &drag->source_destroy);
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}
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drag->pointer_grab.data = drag;
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drag->pointer_grab.interface = &data_device_pointer_drag_interface;
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drag->touch_grab.data = drag;
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drag->touch_grab.interface = &data_device_touch_drag_interface;
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drag->keyboard_grab.data = drag;
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drag->keyboard_grab.interface = &data_device_keyboard_drag_interface;
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return drag;
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}
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void wlr_seat_request_start_drag(struct wlr_seat *seat, struct wlr_drag *drag,
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struct wlr_surface *origin, uint32_t serial) {
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assert(drag->seat == seat);
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if (seat->drag != NULL) {
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wlr_log(WLR_DEBUG, "Rejecting start_drag request, "
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"another drag-and-drop operation is already in progress");
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return;
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}
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struct wlr_seat_request_start_drag_event event = {
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.drag = drag,
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.origin = origin,
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.serial = serial,
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};
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wlr_signal_emit_safe(&seat->events.request_start_drag, &event);
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}
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static void seat_handle_drag_source_destroy(struct wl_listener *listener,
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void *data) {
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struct wlr_seat *seat =
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wl_container_of(listener, seat, drag_source_destroy);
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wl_list_remove(&seat->drag_source_destroy.link);
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seat->drag_source = NULL;
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}
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void wlr_seat_start_drag(struct wlr_seat *seat, struct wlr_drag *drag,
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uint32_t serial) {
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assert(drag->seat == seat);
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assert(!drag->started);
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drag->started = true;
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wlr_seat_keyboard_start_grab(seat, &drag->keyboard_grab);
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seat->drag = drag;
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seat->drag_serial = serial;
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// We need to destroy the previous source, because listeners only expect one
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// active drag source at a time.
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wlr_data_source_destroy(seat->drag_source);
|
|
seat->drag_source = drag->source;
|
|
if (drag->source != NULL) {
|
|
seat->drag_source_destroy.notify = seat_handle_drag_source_destroy;
|
|
wl_signal_add(&drag->source->events.destroy, &seat->drag_source_destroy);
|
|
}
|
|
|
|
wlr_signal_emit_safe(&seat->events.start_drag, drag);
|
|
}
|
|
|
|
void wlr_seat_start_pointer_drag(struct wlr_seat *seat, struct wlr_drag *drag,
|
|
uint32_t serial) {
|
|
drag->grab_type = WLR_DRAG_GRAB_KEYBOARD_POINTER;
|
|
|
|
wlr_seat_pointer_clear_focus(seat);
|
|
wlr_seat_pointer_start_grab(seat, &drag->pointer_grab);
|
|
|
|
wlr_seat_start_drag(seat, drag, serial);
|
|
}
|
|
|
|
void wlr_seat_start_touch_drag(struct wlr_seat *seat, struct wlr_drag *drag,
|
|
uint32_t serial, struct wlr_touch_point *point) {
|
|
drag->grab_type = WLR_DRAG_GRAB_KEYBOARD_TOUCH;
|
|
drag->grab_touch_id = seat->touch_state.grab_id;
|
|
drag->touch_id = point->touch_id;
|
|
|
|
wlr_seat_touch_start_grab(seat, &drag->touch_grab);
|
|
drag_set_focus(drag, point->surface, point->sx, point->sy);
|
|
|
|
wlr_seat_start_drag(seat, drag, serial);
|
|
}
|