xdg-shell: add wlr_xdg_toplevel_configure()

A struct wlr_xdg_toplevel_configure is passed in with the whole
state. This makes it a lot clearer that the size and WM state are
always sent to the client.

include/wlr/types/wlr_xdg_shell.h

@@ -374,6 +374,12 @@ struct wlr_xdg_positioner *wlr_xdg_positioner_from_resource(
  */
 void wlr_xdg_surface_ping(struct wlr_xdg_surface *surface);
 
+/**
+ * Configure the toplevel. Returns the associated configure serial.
+ */
+uint32_t wlr_xdg_toplevel_configure(struct wlr_xdg_toplevel *toplevel,
+		const struct wlr_xdg_toplevel_configure *configure);
+
 /**
  * Request that this toplevel surface be the given size. Returns the associated
  * configure serial.

types/xdg_shell/wlr_xdg_toplevel.c

@@ -545,6 +545,30 @@ void wlr_xdg_toplevel_send_close(struct wlr_xdg_toplevel *toplevel) {
 	xdg_toplevel_send_close(toplevel->resource);
 }
 
+uint32_t wlr_xdg_toplevel_configure(struct wlr_xdg_toplevel *toplevel,
+		const struct wlr_xdg_toplevel_configure *configure) {
+	toplevel->scheduled.width = configure->width;
+	toplevel->scheduled.height = configure->height;
+	toplevel->scheduled.maximized = configure->maximized;
+	toplevel->scheduled.fullscreen = configure->fullscreen;
+	toplevel->scheduled.resizing = configure->resizing;
+	toplevel->scheduled.activated = configure->activated;
+	toplevel->scheduled.suspended = configure->suspended;
+	toplevel->scheduled.tiled = configure->tiled;
+
+	if (configure->fields & WLR_XDG_TOPLEVEL_CONFIGURE_BOUNDS) {
+		toplevel->scheduled.fields |= WLR_XDG_TOPLEVEL_CONFIGURE_BOUNDS;
+		toplevel->scheduled.bounds = configure->bounds;
+	}
+
+	if (configure->fields & WLR_XDG_TOPLEVEL_CONFIGURE_WM_CAPABILITIES) {
+		toplevel->scheduled.fields |= WLR_XDG_TOPLEVEL_CONFIGURE_WM_CAPABILITIES;
+		toplevel->scheduled.wm_capabilities = configure->wm_capabilities;
+	}
+
+	return wlr_xdg_surface_schedule_configure(toplevel->base);
+}
+
 uint32_t wlr_xdg_toplevel_set_size(struct wlr_xdg_toplevel *toplevel,
 		int32_t width, int32_t height) {
 	assert(width >= 0 && height >= 0);