| /** |
| * `editor` type prompt |
| */ |
| |
| var util = require('util'); |
| var chalk = require('chalk'); |
| var ExternalEditor = require('external-editor'); |
| var Base = require('./base'); |
| var observe = require('../utils/events'); |
| var rx = require('rx-lite-aggregates'); |
| |
| /** |
| * Module exports |
| */ |
| |
| module.exports = Prompt; |
| |
| /** |
| * Constructor |
| */ |
| |
| function Prompt() { |
| return Base.apply(this, arguments); |
| } |
| util.inherits(Prompt, Base); |
| |
| /** |
| * Start the Inquiry session |
| * @param {Function} cb Callback when prompt is done |
| * @return {this} |
| */ |
| |
| Prompt.prototype._run = function (cb) { |
| this.done = cb; |
| |
| this.editorResult = new rx.Subject(); |
| |
| // Open Editor on "line" (Enter Key) |
| var events = observe(this.rl); |
| this.lineSubscription = events.line.forEach(this.startExternalEditor.bind(this)); |
| |
| // Trigger Validation when editor closes |
| var validation = this.handleSubmitEvents(this.editorResult); |
| validation.success.forEach(this.onEnd.bind(this)); |
| validation.error.forEach(this.onError.bind(this)); |
| |
| // Prevents default from being printed on screen (can look weird with multiple lines) |
| this.currentText = this.opt.default; |
| this.opt.default = null; |
| |
| // Init |
| this.render(); |
| |
| return this; |
| }; |
| |
| /** |
| * Render the prompt to screen |
| * @return {Prompt} self |
| */ |
| |
| Prompt.prototype.render = function (error) { |
| var bottomContent = ''; |
| var message = this.getQuestion(); |
| |
| if (this.status === 'answered') { |
| message += chalk.dim('Received'); |
| } else { |
| message += chalk.dim('Press <enter> to launch your preferred editor.'); |
| } |
| |
| if (error) { |
| bottomContent = chalk.red('>> ') + error; |
| } |
| |
| this.screen.render(message, bottomContent); |
| }; |
| |
| /** |
| * Launch $EDITOR on user press enter |
| */ |
| |
| Prompt.prototype.startExternalEditor = function () { |
| // Pause Readline to prevent stdin and stdout from being modified while the editor is showing |
| this.rl.pause(); |
| ExternalEditor.editAsync(this.currentText, this.endExternalEditor.bind(this)); |
| }; |
| |
| Prompt.prototype.endExternalEditor = function (error, result) { |
| this.rl.resume(); |
| if (error) { |
| this.editorResult.onError(error); |
| } else { |
| this.editorResult.onNext(result); |
| } |
| }; |
| |
| Prompt.prototype.onEnd = function (state) { |
| this.editorResult.dispose(); |
| this.lineSubscription.dispose(); |
| this.answer = state.value; |
| this.status = 'answered'; |
| // Re-render prompt |
| this.render(); |
| this.screen.done(); |
| this.done(this.answer); |
| }; |
| |
| Prompt.prototype.onError = function (state) { |
| this.render(state.isValid); |
| }; |