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	wlr-touch: make dnd work
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					 5 changed files with 115 additions and 7 deletions
				
			
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			@ -71,6 +71,7 @@ struct wlr_drag {
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	bool cancelling;
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	int32_t grab_touch_id;
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	struct wl_listener point_destroy;
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	struct wl_listener icon_destroy;
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	struct wl_listener source_destroy;
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	struct wl_listener seat_client_unbound;
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			@ -28,9 +28,13 @@ struct wlr_touch_point {
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	int32_t touch_id;
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	struct wlr_surface *surface;
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	struct wlr_seat_client *client;
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	struct wlr_surface *focus_surface;
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	struct wlr_seat_client *focus_client;
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	double sx, sy;
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	struct wl_listener surface_destroy;
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	struct wl_listener focus_surface_destroy;
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	struct wl_listener resource_destroy;
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	struct {
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			@ -74,6 +78,8 @@ struct wlr_touch_grab_interface {
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			struct wlr_touch_point *point);
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	void (*motion)(struct wlr_seat_touch_grab *grab, uint32_t time,
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			struct wlr_touch_point *point);
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	void (*enter)(struct wlr_seat_touch_grab *grab, uint32_t time,
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			struct wlr_touch_point *point);
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	// XXX this will conflict with the actual touch cancel which is different so
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	// we need to rename this
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	void (*cancel)(struct wlr_seat_touch_grab *grab);
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			@ -423,10 +429,24 @@ void wlr_seat_touch_notify_up(struct wlr_seat *seat, uint32_t time,
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 * even if the surface is not the owner of the touch point for processing by
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 * grabs.
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 */
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void wlr_seat_touch_notify_motion(struct wlr_seat *seat,
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void wlr_seat_touch_notify_motion(struct wlr_seat *seat, uint32_t time,
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		int32_t touch_id, double sx, double sy);
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/**
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 * Notify the seat that the touch point given by `touch_id` has entered a new
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 * surface. The surface is required. To clear focus, use
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 * `wlr_seat_touch_point_clear_focus()`.
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 */
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void wlr_seat_touch_point_focus(struct wlr_seat *seat,
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		struct wlr_surface *surface, uint32_t time, int32_t touch_id, double sx,
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		double sy);
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/**
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 * Clear the focused surface for the touch point given by `touch_id`.
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 */
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void wlr_seat_touch_point_clear_focus(struct wlr_seat *seat, uint32_t time,
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		int32_t touch_id);
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/**
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 * Send a touch down event to the client of the given surface. All future touch
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 * events for this point will go to this surface. If the touch down is valid,
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			@ -262,8 +262,13 @@ void roots_cursor_handle_touch_motion(struct roots_cursor *cursor,
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	view_at(desktop, lx, ly, &surface, &sx, &sy);
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	if (surface) {
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		wlr_seat_touch_notify_motion(cursor->seat->seat, surface, event->time_msec,
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		wlr_seat_touch_point_focus(cursor->seat->seat, surface,
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			event->time_msec, event->slot, sx, sy);
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		wlr_seat_touch_notify_motion(cursor->seat->seat, event->time_msec,
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			event->slot, sx, sy);
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	} else {
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		wlr_seat_touch_point_clear_focus(cursor->seat->seat, event->time_msec,
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			event->slot);
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	}
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}
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			@ -554,6 +554,12 @@ static void touch_drag_motion(struct wlr_seat_touch_grab *grab, uint32_t time,
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	}
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}
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static void touch_drag_enter(struct wlr_seat_touch_grab *grab, uint32_t time,
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		struct wlr_touch_point *point) {
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	struct wlr_drag *drag = grab->data;
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	wlr_drag_set_focus(drag, point->focus_surface, point->sx, point->sy);
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}
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static void touch_drag_cancel(struct wlr_seat_touch_grab *grab) {
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	struct wlr_drag *drag = grab->data;
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	wlr_drag_end(drag);
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			@ -563,6 +569,7 @@ const struct wlr_touch_grab_interface wlr_data_device_touch_drag_interface = {
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	.down = touch_drag_down,
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	.up = touch_drag_up,
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	.motion = touch_drag_motion,
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	.enter = touch_drag_enter,
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	.cancel = touch_drag_cancel,
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};
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			@ -313,8 +313,15 @@ static void default_touch_up(struct wlr_seat_touch_grab *grab, uint32_t time,
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static void default_touch_motion(struct wlr_seat_touch_grab *grab,
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		uint32_t time, struct wlr_touch_point *point) {
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	wlr_seat_touch_send_motion(grab->seat, time, point->touch_id, point->sx,
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		point->sy);
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	if (!point->focus_surface || point->focus_surface == point->surface) {
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		wlr_seat_touch_send_motion(grab->seat, time, point->touch_id, point->sx,
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			point->sy);
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	}
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}
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static void default_touch_enter(struct wlr_seat_touch_grab *grab,
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		uint32_t time, struct wlr_touch_point *point) {
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	// not handled by default
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}
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static void default_touch_cancel(struct wlr_seat_touch_grab *grab) {
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			@ -325,6 +332,7 @@ static const struct wlr_touch_grab_interface default_touch_grab_impl = {
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	.down = default_touch_down,
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	.up = default_touch_up,
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	.motion = default_touch_motion,
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	.enter = default_touch_enter,
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	.cancel = default_touch_cancel,
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};
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			@ -998,9 +1006,8 @@ void wlr_seat_touch_notify_up(struct wlr_seat *seat, uint32_t time,
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	touch_point_destroy(point);
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}
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void wlr_seat_touch_notify_motion(struct wlr_seat *seat,
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		struct wlr_surface *surface, uint32_t time, int32_t touch_id, double sx,
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		double sy) {
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void wlr_seat_touch_notify_motion(struct wlr_seat *seat, uint32_t time,
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		int32_t touch_id, double sx, double sy) {
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	clock_gettime(CLOCK_MONOTONIC, &seat->last_event);
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	struct wlr_seat_touch_grab *grab = seat->touch_state.grab;
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	struct wlr_touch_point *point = wlr_seat_touch_get_point(seat, touch_id);
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			@ -1015,6 +1022,74 @@ void wlr_seat_touch_notify_motion(struct wlr_seat *seat,
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	grab->interface->motion(grab, time, point);
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}
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static void touch_point_clear_focus(struct wlr_touch_point *point) {
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	if (point->focus_surface) {
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		wl_list_remove(&point->focus_surface_destroy.link);
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		point->focus_client = NULL;
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		point->focus_surface = NULL;
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	}
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}
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static void handle_point_focus_destroy(struct wl_listener *listener,
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		void *data) {
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	struct wlr_touch_point *point =
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		wl_container_of(listener, point, focus_surface_destroy);
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	touch_point_clear_focus(point);
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}
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static void touch_point_set_focus(struct wlr_touch_point *point,
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		struct wlr_surface *surface, double sx, double sy) {
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	if (point->focus_surface == surface) {
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		return;
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	}
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	touch_point_clear_focus(point);
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	if (surface && surface->resource) {
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		struct wlr_seat_client *client =
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			wlr_seat_client_for_wl_client(point->client->seat,
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				wl_resource_get_client(surface->resource));
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		if (client && client->touch) {
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			wl_signal_add(&surface->events.destroy, &point->focus_surface_destroy);
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			point->focus_surface_destroy.notify = handle_point_focus_destroy;
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			point->focus_surface = surface;
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			point->focus_client = client;
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			point->sx = sx;
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			point->sy = sy;
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		}
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	}
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}
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void wlr_seat_touch_point_focus(struct wlr_seat *seat,
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		struct wlr_surface *surface, uint32_t time, int32_t touch_id, double sx,
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		double sy) {
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	assert(surface);
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	struct wlr_touch_point *point = wlr_seat_touch_get_point(seat, touch_id);
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	if (!point) {
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		wlr_log(L_ERROR, "got touch point focus for unknown touch point");
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		return;
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	}
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	struct wlr_surface *focus = point->focus_surface;
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	touch_point_set_focus(point, surface, sx, sy);
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	if (focus != point->focus_surface) {
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		struct wlr_seat_touch_grab *grab = seat->touch_state.grab;
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		grab->interface->enter(grab, time, point);
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	}
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}
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void wlr_seat_touch_point_clear_focus(struct wlr_seat *seat, uint32_t time,
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		int32_t touch_id) {
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	struct wlr_touch_point *point = wlr_seat_touch_get_point(seat, touch_id);
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	if (!point) {
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		wlr_log(L_ERROR, "got touch point focus for unknown touch point");
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		return;
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	}
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	touch_point_set_focus(point, NULL, 0, 0);
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}
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void wlr_seat_touch_send_down(struct wlr_seat *seat,
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		struct wlr_surface *surface, uint32_t time, int32_t touch_id, double sx,
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		double sy) {
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