start writing chars to screen, yes ik theres a bug, relax

main.ts

@@ -48,8 +48,10 @@ function abFree() {
 
 function exit(msg: string, code: number = 0) {
   resetScreen();
-
-  console.log(`${bytesWritten} bytes written this session!\r\n${msg}\r\n`);
+
+  // TODO: fix how bytes are being accumulated
+  // console.log(`${bytesWritten} bytes written this session!\r\n${msg}\r\n`);
+  console.log(`${msg}\r\n`);
 
   Deno.stdin.close();
   Deno.stdout.close();
@@ -205,6 +207,21 @@ function editorAppendRow(msg: string) {
   e.numRows++;
 }
 
+function editorRowInsertChar(row: number, at: number, char: string) {
+  if (at < 0 || at > e.row[row].length) at = e.row[row].length;
+
+  e.row[row] = e.row[row].substring(0, at) + char + e.row[row].substring(at + 1);
+  editorUpdateRow(row);
+}
+
+function editorInsertChar(char: string) {
+  if (e.cursorY == e.numRows) {
+    editorAppendRow("");
+  }
+  editorRowInsertChar(e.cursorY, e.cursorX, char);
+  e.cursorX++;
+}
+
 function editorOpen(filename: string) {
   console.log(`filename: ${filename}`);
   e.filename = filename;
@@ -420,6 +437,10 @@ function editorProcessKeypress() {
     case EditorKey.ARROW_RIGHT:
       editorMoveCursor(char);
       break;
+
+    default:
+      editorInsertChar(String.fromCharCode(char));
+      break;
   }
 }