Get the padding on the welcome message just right

src/common/editor/editor.ts

@@ -57,10 +57,23 @@ export class Editor {
 	}
 
 	private drawRows(): void {
+		this.drawPlaceholderRows();
+	}
+
+	private drawPlaceholderRows(): void {
 		for (let y = 0; y < this.#screenRows; y++) {
-			if (y === this.#screenRows / 3) {
+			if (y === Math.trunc(this.#screenRows / 2)) {
 				const message = `Kilo editor -- version ${VERSION}`;
-				this.#buffer.append(truncate(message, this.#screenCols));
+				const messageLen = (message.length > this.#screenCols) ? this.#screenCols : message.length;
+				let padding = Math.trunc((this.#screenCols - messageLen) / 2);
+				if (padding > 0) {
+					this.#buffer.append('~');
+					padding -= 1;
+
+					this.#buffer.append(' '.repeat(padding));
+				}
+
+				this.#buffer.append(truncate(message, messageLen));
 			} else {
 				this.#buffer.append('~');
 			}