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Diffstat (limited to 'node_modules/prompts/lib/elements/prompt.js')
-rw-r--r-- | node_modules/prompts/lib/elements/prompt.js | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/node_modules/prompts/lib/elements/prompt.js b/node_modules/prompts/lib/elements/prompt.js new file mode 100644 index 0000000..b793330 --- /dev/null +++ b/node_modules/prompts/lib/elements/prompt.js @@ -0,0 +1,68 @@ +'use strict'; + +const readline = require('readline'); +const { action } = require('../util'); +const EventEmitter = require('events'); +const { beep, cursor } = require('sisteransi'); +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; |