Files F105097622

prompt.js
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Created: Fri, Mar 14, 17:53

prompt.js
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	'use strict';

	const readline = require('readline');

	const _require = require('../util'),
	action = _require.action;

	const EventEmitter = require('events');

	const _require2 = require('sisteransi'),
	beep = _require2.beep,
	cursor = _require2.cursor;

	const color = require('kleur');
	/**
	* Base prompt skeleton
	* @param {Stream} [opts.stdin] The Readable stream to listen to
	* @param {Stream} [opts.stdout] The Writable stream to write readline data to
	*/


	class Prompt extends EventEmitter {
	constructor(opts = {}) {
	super();
	this.firstRender = true;
	this.in = opts.stdin \|\| process.stdin;
	this.out = opts.stdout \|\| process.stdout;

	this.onRender = (opts.onRender \|\| (() => void 0)).bind(this);

	const rl = readline.createInterface({
	input: this.in,
	escapeCodeTimeout: 50
	});
	readline.emitKeypressEvents(this.in, rl);
	if (this.in.isTTY) this.in.setRawMode(true);
	const isSelect = ['SelectPrompt', 'MultiselectPrompt'].indexOf(this.constructor.name) > -1;

	const keypress = (str, key) => {
	let a = action(key, isSelect);

	if (a === false) {
	this._ && this._(str, key);
	} else if (typeof this[a] === 'function') {
	this[a](key);
	} else {
	this.bell();
	}
	};

	this.close = () => {
	this.out.write(cursor.show);
	this.in.removeListener('keypress', keypress);
	if (this.in.isTTY) this.in.setRawMode(false);
	rl.close();
	this.emit(this.aborted ? 'abort' : this.exited ? 'exit' : 'submit', this.value);
	this.closed = true;
	};

	this.in.on('keypress', keypress);
	}

	fire() {
	this.emit('state', {
	value: this.value,
	aborted: !!this.aborted,
	exited: !!this.exited
	});
	}

	bell() {
	this.out.write(beep);
	}

	render() {
	this.onRender(color);
	if (this.firstRender) this.firstRender = false;
	}

	}

	module.exports = Prompt;

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