Sha256: 37670127511ee81227b91b59f45d0ae2648e5dca1e16479a152969f8af8fe559
Contents?: true
Size: 1.7 KB
Versions: 62
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Stored size: 1.7 KB
Contents
'use strict';
var _ = require('lodash');
var readlineFacade = require('readline2');
/**
* Base interface class other can inherits from
*/
var UI = module.exports = function (opt) {
// Instantiate the Readline interface
// @Note: Don't reassign if already present (allow test to override the Stream)
if (!this.rl) {
this.rl = readlineFacade.createInterface(opt);
}
this.rl.resume();
this.onForceClose = this.onForceClose.bind(this);
this.onKeypress = this.onKeypress.bind(this);
// Make sure new prompt start on a newline when closing
this.rl.on('SIGINT', this.onForceClose);
process.on('exit', this.onForceClose);
// Propagate keypress events directly on the readline
this.rl.input.addListener('keypress', this.onKeypress);
};
/**
* Handle the ^C exit
* @return {null}
*/
UI.prototype.onForceClose = function () {
this.close();
console.log('\n'); // Line return
};
/**
* Close the interface and cleanup listeners
*/
UI.prototype.close = function () {
// Remove events listeners
this.rl.removeListener('SIGINT', this.onForceClose);
this.rl.input.removeListener('keypress', this.onKeypress);
process.removeListener('exit', this.onForceClose);
// Restore prompt functionnalities
this.rl.output.unmute();
this.rl.output.write('\x1B[?25h'); // show cursor
// Close the readline
this.rl.output.end();
this.rl.pause();
this.rl.close();
this.rl = null;
};
/**
* Handle and propagate keypress events
*/
UI.prototype.onKeypress = function (s, key) {
// Ignore `enter` key (readline `line` event is the only one we care for)
if (key && (key.name === 'enter' || key.name === 'return')) {
return;
}
if (this.rl) {
this.rl.emit( 'keypress', s, key );
}
};
Version data entries
62 entries across 62 versions & 1 rubygems