xwm: moveresize events

include/rootston/view.h

@@ -34,6 +34,8 @@ struct roots_xwayland_surface {
 	// TODO: Maybe destroy listener should go in roots_view
 	struct wl_listener destroy;
 	struct wl_listener request_configure;
+	struct wl_listener request_move;
+	struct wl_listener request_resize;
 	struct wl_listener map_notify;
 	struct wl_listener unmap_notify;
 };

include/wlr/xwayland.h

@@ -104,6 +104,8 @@ struct wlr_xwayland_surface {
 	struct {
 		struct wl_signal destroy;
 		struct wl_signal request_configure;
+		struct wl_signal request_move;
+		struct wl_signal request_resize;
 		struct wl_signal map_notify;
 		struct wl_signal unmap_notify;
 		struct wl_signal set_title;
@@ -126,6 +128,16 @@ struct wlr_xwayland_surface_configure_event {
 	uint16_t width, height;
 };
 
+// TODO: maybe add a seat to these
+struct wlr_xwayland_move_event {
+	struct wlr_xwayland_surface *surface;
+};
+
+struct wlr_xwayland_resize_event {
+	struct wlr_xwayland_surface *surface;
+	uint32_t edges;
+};
+
 void wlr_xwayland_destroy(struct wlr_xwayland *wlr_xwayland);
 struct wlr_xwayland *wlr_xwayland_create(struct wl_display *wl_display,
 	struct wlr_compositor *compositor);

rootston/xwayland.c

@@ -60,6 +60,57 @@ static void handle_request_configure(struct wl_listener *listener, void *data) {
 		xwayland_surface, event->x, event->y, event->width, event->height);
 }
 
+// XXX Needs deep refactoring to get this better. We need to select the correct
+// seat based on seat pointer focus, but interactive moving and resizing is not
+// yet seat aware. Even then, we can only guess because X11 events don't give us
+// enough wayland info to know for sure.
+static struct wlr_cursor *guess_cursor_for_view(struct roots_view *view) {
+	struct roots_input *input = view->desktop->server->input;
+	size_t len = sizeof(input->input_events) / sizeof(*input->input_events);
+	for (size_t i = 0; i < len; i++) {
+		struct wlr_cursor *cursor = input->input_events[i].cursor;
+		if (cursor) {
+			int width = view->xwayland_surface->surface->current->width;
+			int height = view->xwayland_surface->surface->current->height;
+			if (cursor->x > view->x && cursor->y > view->y &&
+					cursor->x < view->x + width &&
+					cursor->y < view->y + height) {
+				return cursor;
+			}
+		}
+	}
+
+	return NULL;
+}
+
+static void handle_request_move(struct wl_listener *listener, void *data) {
+	struct roots_xwayland_surface *roots_surface =
+		wl_container_of(listener, roots_surface, request_move);
+	struct roots_view *view = roots_surface->view;
+	struct roots_input *input = view->desktop->server->input;
+	struct wlr_cursor *cursor = guess_cursor_for_view(view);
+
+	if (!cursor || input->mode != ROOTS_CURSOR_PASSTHROUGH) {
+		return;
+	}
+
+	view_begin_move(input, cursor, view);
+}
+
+static void handle_request_resize(struct wl_listener *listener, void *data) {
+	struct roots_xwayland_surface *roots_surface =
+		wl_container_of(listener, roots_surface, request_resize);
+	struct roots_view *view = roots_surface->view;
+	struct roots_input *input = view->desktop->server->input;
+	struct wlr_cursor *cursor = guess_cursor_for_view(view);
+	struct wlr_xwayland_resize_event *e = data;
+
+	if (!cursor || input->mode != ROOTS_CURSOR_PASSTHROUGH) {
+		return;
+	}
+	view_begin_resize(input, cursor, view, e->edges);
+}
+
 static void handle_map_notify(struct wl_listener *listener, void *data) {
 	struct roots_xwayland_surface *roots_surface =
 		wl_container_of(listener, roots_surface, map_notify);
@@ -114,6 +165,12 @@ void handle_xwayland_surface(struct wl_listener *listener, void *data) {
 	roots_surface->unmap_notify.notify = handle_unmap_notify;
 	wl_signal_add(&surface->events.unmap_notify, &roots_surface->unmap_notify);
 
+	roots_surface->request_move.notify = handle_request_move;
+	wl_signal_add(&surface->events.request_move, &roots_surface->request_move);
+
+	roots_surface->request_resize.notify = handle_request_resize;
+	wl_signal_add(&surface->events.request_resize, &roots_surface->request_resize);
+
 	struct roots_view *view = calloc(1, sizeof(struct roots_view));
 	if (view == NULL) {
 		free(roots_surface);

xwayland/xwm.c

@@ -82,6 +82,8 @@ static struct wlr_xwayland_surface *wlr_xwayland_surface_create(
 	surface->state = wlr_list_create();
 	wl_signal_init(&surface->events.destroy);
 	wl_signal_init(&surface->events.request_configure);
+	wl_signal_init(&surface->events.request_move);
+	wl_signal_init(&surface->events.request_resize);
 	wl_signal_init(&surface->events.map_notify);
 	wl_signal_init(&surface->events.unmap_notify);
 	wl_signal_init(&surface->events.set_class);
@@ -706,9 +708,58 @@ static void handle_surface_id_message(struct wlr_xwm *xwm,
 	}
 }
 
+#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT      0
+#define _NET_WM_MOVERESIZE_SIZE_TOP          1
+#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT     2
+#define _NET_WM_MOVERESIZE_SIZE_RIGHT        3
+#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT  4
+#define _NET_WM_MOVERESIZE_SIZE_BOTTOM       5
+#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT   6
+#define _NET_WM_MOVERESIZE_SIZE_LEFT         7
+#define _NET_WM_MOVERESIZE_MOVE              8  // movement only
+#define _NET_WM_MOVERESIZE_SIZE_KEYBOARD     9  // size via keyboard
+#define _NET_WM_MOVERESIZE_MOVE_KEYBOARD    10  // move via keyboard
+#define _NET_WM_MOVERESIZE_CANCEL           11  // cancel operation
+
 static void handle_net_wm_moveresize_message(struct wlr_xwm *xwm,
 		xcb_client_message_event_t *ev) {
-	wlr_log(L_DEBUG, "TODO: handle moveresize");
+	// same as xdg-toplevel-v6
+	// TODO need a common enum for this
+	static const int map[] = {
+		5, 1, 9, 8, 10, 2, 6, 4
+	};
+
+	struct wlr_xwayland_surface *xsurface = lookup_surface(xwm, ev->window);
+	if (!xsurface) {
+		return;
+	}
+
+	// TODO: we should probably add input or seat info to this but we would just
+	// be guessing
+	struct wlr_xwayland_resize_event resize_event;
+	struct wlr_xwayland_move_event move_event;
+
+	int detail = ev->data.data32[2];
+	switch (detail) {
+	case _NET_WM_MOVERESIZE_MOVE:
+		move_event.surface = xsurface;
+		wl_signal_emit(&xsurface->events.request_move, &move_event);
+		break;
+	case _NET_WM_MOVERESIZE_SIZE_TOPLEFT:
+	case _NET_WM_MOVERESIZE_SIZE_TOP:
+	case _NET_WM_MOVERESIZE_SIZE_TOPRIGHT:
+	case _NET_WM_MOVERESIZE_SIZE_RIGHT:
+	case _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT:
+	case _NET_WM_MOVERESIZE_SIZE_BOTTOM:
+	case _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT:
+	case _NET_WM_MOVERESIZE_SIZE_LEFT:
+		resize_event.surface = xsurface;
+		resize_event.edges = map[detail];
+		wl_signal_emit(&xsurface->events.request_resize, &resize_event);
+		break;
+	case _NET_WM_MOVERESIZE_CANCEL:
+		break;
+	}
 }
 
 static void handle_client_message(struct wlr_xwm *xwm,
@@ -980,6 +1031,14 @@ static void xwm_create_wm_window(struct wlr_xwm *xwm) {
 		32, // format
 		1, &xwm->window);
 
+	xcb_change_property(xwm->xcb_conn,
+		XCB_PROP_MODE_REPLACE,
+		xwm->window,
+		xwm->atoms[_NET_SUPPORTING_WM_CHECK],
+		XCB_ATOM_WINDOW,
+		32, // format
+		1, &xwm->window);
+
 	xcb_set_selection_owner(xwm->xcb_conn,
 		xwm->window,
 		xwm->atoms[WM_S0],