Handle tab press

js/type.js

@@ -165,6 +165,9 @@ function handleKeyDown(event) {
 		} else if (event.keyCode == 13) { // enter
 			event.preventDefault();
 			handleEnter(event);
+		} else if (event.keyCode == 9) { // tab
+			event.preventDefault();
+			handleTab(event);
 		}
 	}
 }
@@ -225,6 +228,14 @@ function handleEnter(event) {
 	}
 }
 
+function handleTab(event) {
+	let pos = editor.getCursor();
+	let line = editor.doc.getLine(pos.line);
+	if (line.charCodeAt(pos.ch) == 9) {
+		setCursor({ line: pos.line, ch: pos.ch + 1 });
+	}
+}
+
 function moveToEndOfPreviousLine() {
 	let pos = editor.getCursor();
 	if (pos.line > 0) {