Handle set_cursor requests from clients

Allow clients to set a custom cursor if they have the seat's
pointer focus.

1 files changed, 42 insertions, 8 deletions

diff --git a/sway/input/cursor.c b/sway/input/cursor.c
index d57ac3e3..cded0005 100644
--- a/sway/input/cursor.c
+++ b/sway/input/cursor.c
@@ -25,10 +25,12 @@ static void cursor_send_pointer_motion(struct sway_cursor *cursor,
         struct wlr_surface *surface = NULL;
         double sx, sy;
 
+        struct sway_container *focus = NULL;
+
         // check for unmanaged views first
         struct sway_view *view;
         wl_list_for_each_reverse(view, &root_container.sway_root->unmanaged_views,
-                unmanaged_view_link) {
+                        unmanaged_view_link) {
                 if (view->type == SWAY_XWAYLAND_VIEW) {
                         struct wlr_xwayland_surface *xsurface = view->wlr_xwayland_surface;
                         struct wlr_box box = {
@@ -39,19 +41,34 @@ static void cursor_send_pointer_motion(struct sway_cursor *cursor,
                         };
 
                         if (wlr_box_contains_point(&box, cursor->x, cursor->y)) {
+                                focus = view->swayc;
                                 surface = xsurface->surface;
                                 sx = cursor->x - box.x;
                                 sy = cursor->y - box.y;
-                                wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
-                                wlr_seat_pointer_notify_motion(seat, time, sx, sy);
-                                return;
+                                break;
                         }
                 }
         }
 
-        struct sway_container *swayc =
-                container_at(&root_container, cursor->x, cursor->y, &surface, &sx, &sy);
-        if (swayc) {
+        // then check for managed views
+        if (focus == NULL) {
+                focus = container_at(&root_container, cursor->x, cursor->y, &surface,
+                        &sx, &sy);
+        }
+
+        // reset cursor if switching between clients
+        struct wl_client *client = NULL;
+        if (focus) {
+                client = wl_resource_get_client(surface->resource);
+        }
+        if (client != cursor->image_client) {
+                wlr_xcursor_manager_set_cursor_image(cursor->xcursor_manager,
+                        "left_ptr", cursor->cursor);
+                cursor->image_client = client;
+        }
+
+        // send pointer enter/leave
+        if (focus) {
                 wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
                 wlr_seat_pointer_notify_motion(seat, time, sx, sy);
         } else {
@@ -145,7 +162,24 @@ static void handle_request_set_cursor(struct wl_listener *listener,
         struct sway_cursor *cursor =
                 wl_container_of(listener, cursor, request_set_cursor);
         struct wlr_seat_pointer_request_set_cursor_event *event = data;
-        wlr_log(L_DEBUG, "TODO: handle request set cursor event: %p", event);
+
+        struct wl_client *focused_client = NULL;
+        struct wlr_surface *focused_surface =
+                cursor->seat->wlr_seat->pointer_state.focused_surface;
+        if (focused_surface != NULL) {
+                focused_client = wl_resource_get_client(focused_surface->resource);
+        }
+
+        // TODO: check cursor mode
+        if (focused_client == NULL ||
+                        event->seat_client->client != focused_client) {
+                wlr_log(L_DEBUG, "denying request to set cursor from unfocused client");
+                return;
+        }
+
+        wlr_cursor_set_surface(cursor->cursor, event->surface, event->hotspot_x,
+                event->hotspot_y);
+        cursor->image_client = focused_client;
 }
 
 void sway_cursor_destroy(struct sway_cursor *cursor) {