add cursor changing (WIP).

src/component/types/state.ts

@@ -35,6 +35,7 @@ export interface Video {
 /////////////////////////////
 export interface Control {
   scroll: Scroll
+  cursor: Cursor | null
   clipboard: Clipboard | null
   host_id: string | null
   implicit_hosting: boolean
@@ -45,6 +46,12 @@ export interface Scroll {
   sensitivity: number
 }
 
+export interface Cursor {
+  uri: string
+  hot_x: number
+  hot_y: number
+}
+
 export interface Clipboard {
   text: string
 }