Provide screen dimensions

concept-code/console/ConsoleApp.ts

@@ -1,7 +1,17 @@
+export type RenderInfo = {
+  screenWidth: number;
+  screenHeight: number;
+};
+
 type ConsoleApp<Db, View> = {
   createView(): View;
-  render: (this: { db: Db, view: View }) => string;
-  onKeyDown: (this: { db: Db, view: View }, key: string) => void;
+
+  render: (
+    this: { db: Db; view: View },
+    info: RenderInfo,
+  ) => string;
+
+  onKeyDown: (this: { db: Db; view: View }, key: string) => void;
 };
 
 export default ConsoleApp;

concept-code/console/Counter.ts

@@ -1,4 +1,5 @@
 import type ConsoleApp from "./ConsoleApp.ts";
+import type { RenderInfo } from "./ConsoleApp.ts";
 
 type View = {
   offset: number;
@@ -12,8 +13,13 @@ export default class ConsoleAppDemo
     return { offset: 0 };
   }
 
-  render = function (this: { db: ConsoleAppDemo; view: View }) {
-    return `${" ".repeat(this.view.offset)}${this.db.value}`;
+  render = function (
+    this: { db: ConsoleAppDemo; view: View },
+    { screenWidth, screenHeight }: RenderInfo,
+  ) {
+    return `${
+      " ".repeat(this.view.offset)
+    }${this.db.value}\n${screenWidth}x${screenHeight}`;
   };
 
   onKeyDown = function (this: { db: ConsoleAppDemo; view: View }, key: string) {

vstc/src/console_command.rs

@@ -12,6 +12,7 @@ use termion::{
   event::Key,
   input::{MouseTerminal, TermRead},
   raw::{IntoRawMode, RawTerminal},
+  terminal_size,
 };
 use valuescript_compiler::{assemble, compile_str};
 use valuescript_vm::{
@@ -180,8 +181,23 @@ impl ConsoleApp {
       .sub(&"render".to_val())
       .or_exit_uncaught();
 
+    let (width, height) = terminal_size().unwrap();
+
+    let info = VsObject {
+      string_map: [
+        ("screenWidth".to_string(), (width as f64).to_val()),
+        ("screenHeight".to_string(), (height as f64).to_val()),
+      ]
+      .iter()
+      .cloned()
+      .collect(),
+      symbol_map: Default::default(),
+      prototype: Val::Void,
+    }
+    .to_val();
+
     match vm
-      .run(None, &mut self.ctx, render, vec![])
+      .run(None, &mut self.ctx, render, vec![info])
       .or_exit_uncaught()
     {
       Val::String(s) => {