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seat/dnd: support null drag icon surfaces

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As per the Wayland spec [1]:

> The icon surface is an optional (can be NULL) surface that provides an
> icon to be moved around with the cursor.

However, as of now Sway "start_drag" signal handler does not starts the
DND session unless a non-NULL drag icons is provided. This patch fixes
it by skipping handling of the drag icon if it is null.

Fixes #5509

[1] https://wayland.freedesktop.org/docs/html/apa.html#protocol-spec-wl_data_device

Signed-off-by: Nick Diego Yamane <nickdiego@igalia.com>
This commit is contained in:
Nick Diego Yamane 2020-07-06 17:17:04 -04:00 committed by Simon Ser
parent bac9559665
commit e5954f321f
1 changed files with 22 additions and 24 deletions
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46
sway/input/seat.c
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@ -470,31 +470,29 @@ static void handle_start_drag(struct wl_listener *listener, void *data) {
wl_signal_add(&wlr_drag->events.destroy, &drag->destroy);
struct wlr_drag_icon *wlr_drag_icon = wlr_drag->icon;
if (wlr_drag_icon == NULL) {
return;
if (wlr_drag_icon != NULL) {
struct sway_drag_icon *icon = calloc(1, sizeof(struct sway_drag_icon));
if (icon == NULL) {
sway_log(SWAY_ERROR, "Allocation failed");
return;
}
icon->seat = seat;
icon->wlr_drag_icon = wlr_drag_icon;
wlr_drag_icon->data = icon;
icon->surface_commit.notify = drag_icon_handle_surface_commit;
wl_signal_add(&wlr_drag_icon->surface->events.commit, &icon->surface_commit);
icon->unmap.notify = drag_icon_handle_unmap;
wl_signal_add(&wlr_drag_icon->events.unmap, &icon->unmap);
icon->map.notify = drag_icon_handle_map;
wl_signal_add(&wlr_drag_icon->events.map, &icon->map);
icon->destroy.notify = drag_icon_handle_destroy;
wl_signal_add(&wlr_drag_icon->events.destroy, &icon->destroy);
wl_list_insert(&root->drag_icons, &icon->link);
drag_icon_update_position(icon);
}
struct sway_drag_icon *icon = calloc(1, sizeof(struct sway_drag_icon));
if (icon == NULL) {
sway_log(SWAY_ERROR, "Allocation failed");
return;
}
icon->seat = seat;
icon->wlr_drag_icon = wlr_drag_icon;
wlr_drag_icon->data = icon;
icon->surface_commit.notify = drag_icon_handle_surface_commit;
wl_signal_add(&wlr_drag_icon->surface->events.commit, &icon->surface_commit);
icon->unmap.notify = drag_icon_handle_unmap;
wl_signal_add(&wlr_drag_icon->events.unmap, &icon->unmap);
icon->map.notify = drag_icon_handle_map;
wl_signal_add(&wlr_drag_icon->events.map, &icon->map);
icon->destroy.notify = drag_icon_handle_destroy;
wl_signal_add(&wlr_drag_icon->events.destroy, &icon->destroy);
wl_list_insert(&root->drag_icons, &icon->link);
drag_icon_update_position(icon);
seatop_begin_default(seat);
}