scroll/src/common/document.ts

import { chars } from './utils.ts';

export class Row {
	chars: string[] = [];

	constructor(s: string = '') {
		this.chars = chars(s);
	}

	public toString(): string {
		return this.chars.join('');
	}
}

export class Document {
	#rows: Row[];

	private constructor() {
		this.#rows = [];
	}

	get numrows(): number {
		return this.#rows.length;
	}

	public static empty(): Document {
		return new Document();
	}

	public static open(_filename: string): Document {
		const doc = new Document();
		const line = 'Hello, World!';
		const row = new Row(line);

		doc.#rows.push(row);

		return doc;
	}

	public getRow(i: number): Row | null {
		if (this.#rows[i] !== undefined) {
			return this.#rows[i];
		}

		return null;
	}
}

export default Document;