92 lines
1.7 KiB
JavaScript
92 lines
1.7 KiB
JavaScript
import { chars } from './utils.ts';
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import Row from './row.ts';
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import { getRuntime } from './runtime.ts';
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import { Position, SCROLL_TAB_SIZE } from './mod.ts';
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export class Document {
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#filename: string | null;
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#rows: Row[];
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dirty: boolean;
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private constructor() {
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this.#rows = [];
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this.#filename = null;
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this.dirty = false;
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}
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get numRows(): number {
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return this.#rows.length;
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}
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public static empty(): Document {
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return new Document();
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}
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public isEmpty(): boolean {
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return this.#rows.length === 0;
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}
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public async open(filename: string): Promise<Document> {
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const { file } = await getRuntime();
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// Clear any existing rows
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if (!this.isEmpty()) {
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this.#rows = [];
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}
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const rawFile = await file.openFile(filename);
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rawFile.split(/\r?\n/)
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.forEach((row) => this.appendRow(row));
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this.#filename = filename;
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this.dirty = false;
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return this;
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}
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public async save() {
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if (this.#filename === null) {
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return;
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}
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const { file } = await getRuntime();
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await file.saveFile(this.#filename, this.rowsToString());
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this.dirty = false;
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}
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public insert(at: Position, c: string): void {
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if (at.y === this.numRows) {
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this.appendRow(c);
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} else {
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this.#rows[at.y].insertChar(at.x, c);
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this.updateRow(this.#rows[at.y]);
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}
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this.dirty = true;
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}
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public row(i: number): Row | null {
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return this.#rows[i] ?? null;
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}
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public appendRow(s: string): void {
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const at = this.numRows;
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this.#rows[at] = new Row(s);
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this.updateRow(this.#rows[at]);
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this.dirty = true;
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}
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private updateRow(r: Row): void {
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r.render = chars(r.toString().replace('\t', ' '.repeat(SCROLL_TAB_SIZE)));
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}
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private rowsToString(): string {
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return this.#rows.map((r) => r.toString()).join('\n');
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}
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}
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export default Document;
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