Always unmap before destroying surface

include/wlr/types/wlr_xdg_shell.h

@@ -102,6 +102,16 @@ struct wlr_xdg_surface_configure {
 	struct wlr_xdg_toplevel_state *toplevel_state;
 };
 
+/**
+ * An xdg-surface is a user interface element requiring management by the
+ * compositor. An xdg-surface alone isn't useful, a role should be assigned to
+ * it in order to map it.
+ *
+ * When a surface has a role and is ready to be displayed, the `map` event is
+ * emitted. When a surface should no longer be displayed, the `unmap` event is
+ * emitted. The `unmap` event is guaranted to be emitted before the `destroy`
+ * event if the view is destroyed when mapped.
+ */
 struct wlr_xdg_surface {
 	struct wlr_xdg_client *client;
 	struct wl_resource *resource;

include/wlr/types/wlr_xdg_shell_v6.h

@@ -90,6 +90,16 @@ struct wlr_xdg_toplevel_v6_state {
 	uint32_t min_width, min_height;
 };
 
+/**
+ * An xdg-surface is a user interface element requiring management by the
+ * compositor. An xdg-surface alone isn't useful, a role should be assigned to
+ * it in order to map it.
+ *
+ * When a surface has a role and is ready to be displayed, the `map` event is
+ * emitted. When a surface should no longer be displayed, the `unmap` event is
+ * emitted. The `unmap` event is guaranted to be emitted before the `destroy`
+ * event if the view is destroyed when mapped.
+ */
 struct wlr_xdg_toplevel_v6 {
 	struct wl_resource *resource;
 	struct wlr_xdg_surface_v6 *base;

include/wlr/xwayland.h

@@ -75,6 +75,15 @@ struct wlr_xwayland_surface_size_hints {
 	uint32_t win_gravity;
 };
 
+/**
+ * An Xwayland user interface component. It has an absolute position in
+ * layout-local coordinates.
+ *
+ * When a surface is ready to be displayed, the `map` event is emitted. When a
+ * surface should no longer be displayed, the `unmap` event is emitted. The
+ * `unmap` event is guaranted to be emitted before the `destroy` event if the
+ * view is destroyed when mapped.
+ */
 struct wlr_xwayland_surface {
 	xcb_window_t window_id;
 	struct wlr_xwm *xwm;
@@ -116,8 +125,7 @@ struct wlr_xwayland_surface {
 
 	// _NET_WM_STATE
 	bool fullscreen;
-	bool maximized_vert;
-	bool maximized_horz;
+	bool maximized_vert, maximized_horz;
 
 	bool has_alpha;
 

xwayland/xwm.c

@@ -273,8 +273,12 @@ static void xsurface_set_net_wm_state(struct wlr_xwayland_surface *xsurface) {
 		i, property);
 }
 
+static void xsurface_unmap(struct wlr_xwayland_surface *surface);
+
 static void wlr_xwayland_surface_destroy(
 		struct wlr_xwayland_surface *xsurface) {
+	xsurface_unmap(xsurface);
+
 	wlr_signal_emit_safe(&xsurface->events.destroy, xsurface);
 
 	if (xsurface == xsurface->xwm->focus_surface) {
@@ -618,7 +622,8 @@ static void handle_surface_commit(struct wlr_surface *wlr_surface,
 	if (!xsurface->added &&
 			wlr_surface_has_buffer(xsurface->surface) &&
 			xsurface->mapped) {
-		wlr_signal_emit_safe(&xsurface->xwm->xwayland->events.new_surface, xsurface);
+		wlr_signal_emit_safe(&xsurface->xwm->xwayland->events.new_surface,
+			xsurface);
 		xsurface->added = true;
 	}
 }
@@ -626,9 +631,7 @@ static void handle_surface_commit(struct wlr_surface *wlr_surface,
 static void handle_surface_destroy(struct wl_listener *listener, void *data) {
 	struct wlr_xwayland_surface *xsurface =
 		wl_container_of(listener, xsurface, surface_destroy);
-
-	xsurface->surface = NULL;
-	// TODO destroy xwayland surface?
+	xsurface_unmap(xsurface);
 }
 
 static void xwm_map_shell_surface(struct wlr_xwm *xwm,
@@ -665,6 +668,27 @@ static void xwm_map_shell_surface(struct wlr_xwm *xwm,
 	wlr_signal_emit_safe(&xsurface->events.map, xsurface);
 }
 
+static void xsurface_unmap(struct wlr_xwayland_surface *surface) {
+	if (surface->mapped) {
+		surface->mapped = false;
+		wlr_signal_emit_safe(&surface->events.unmap, surface);
+	}
+
+	if (surface->surface_id) {
+		// Make sure we're not on the unpaired surface list or we
+		// could be assigned a surface during surface creation that
+		// was mapped before this unmap request.
+		wl_list_remove(&surface->unpaired_link);
+		surface->surface_id = 0;
+	}
+
+	if (surface->surface) {
+		wlr_surface_set_role_committed(surface->surface, NULL, NULL);
+		wl_list_remove(&surface->surface_destroy.link);
+		surface->surface = NULL;
+	}
+}
+
 static void xwm_handle_create_notify(struct wlr_xwm *xwm,
 		xcb_create_notify_event_t *ev) {
 	wlr_log(L_DEBUG, "XCB_CREATE_NOTIFY (%u)", ev->window);
@@ -778,25 +802,7 @@ static void xwm_handle_unmap_notify(struct wlr_xwm *xwm,
 		return;
 	}
 
-	if (xsurface->mapped) {
-		xsurface->mapped = false;
-		wlr_signal_emit_safe(&xsurface->events.unmap, xsurface);
-	}
-
-	if (xsurface->surface_id) {
-		// Make sure we're not on the unpaired surface list or we
-		// could be assigned a surface during surface creation that
-		// was mapped before this unmap request.
-		wl_list_remove(&xsurface->unpaired_link);
-		xsurface->surface_id = 0;
-	}
-
-	if (xsurface->surface) {
-		wlr_surface_set_role_committed(xsurface->surface, NULL, NULL);
-		wl_list_remove(&xsurface->surface_destroy.link);
-	}
-	xsurface->surface = NULL;
-
+	xsurface_unmap(xsurface);
 	xsurface_set_wm_state(xsurface, ICCCM_WITHDRAWN_STATE);
 }