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qwen/nodejs/node_modules/prompts/lib/elements/number.js

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+const color = require('kleur');
+const Prompt = require('./prompt');
+const { cursor, erase } = require('sisteransi');
+const { style, figures, clear, lines } = require('../util');
+
+const isNumber = /[0-9]/;
+const isDef = any => any !== undefined;
+const round = (number, precision) => {
+  let factor = Math.pow(10, precision);
+  return Math.round(number * factor) / factor;
+}
+
+/**
+ * NumberPrompt Base Element
+ * @param {Object} opts Options
+ * @param {String} opts.message Message
+ * @param {String} [opts.style='default'] Render style
+ * @param {Number} [opts.initial] Default value
+ * @param {Number} [opts.max=+Infinity] Max value
+ * @param {Number} [opts.min=-Infinity] Min value
+ * @param {Boolean} [opts.float=false] Parse input as floats
+ * @param {Number} [opts.round=2] Round floats to x decimals
+ * @param {Number} [opts.increment=1] Number to increment by when using arrow-keys
+ * @param {Function} [opts.validate] Validate function
+ * @param {Stream} [opts.stdin] The Readable stream to listen to
+ * @param {Stream} [opts.stdout] The Writable stream to write readline data to
+ * @param {String} [opts.error] The invalid error label
+ */
+class NumberPrompt extends Prompt {
+  constructor(opts={}) {
+    super(opts);
+    this.transform = style.render(opts.style);
+    this.msg = opts.message;
+    this.initial = isDef(opts.initial) ? opts.initial : '';
+    this.float = !!opts.float;
+    this.round = opts.round || 2;
+    this.inc = opts.increment || 1;
+    this.min = isDef(opts.min) ? opts.min : -Infinity;
+    this.max = isDef(opts.max) ? opts.max : Infinity;
+    this.errorMsg = opts.error || `Please Enter A Valid Value`;
+    this.validator = opts.validate || (() => true);
+    this.color = `cyan`;
+    this.value = ``;
+    this.typed = ``;
+    this.lastHit = 0;
+    this.render();
+  }
+
+  set value(v) {
+    if (!v && v !== 0) {
+      this.placeholder = true;
+      this.rendered = color.gray(this.transform.render(`${this.initial}`));
+      this._value = ``;
+    } else {
+      this.placeholder = false;
+      this.rendered = this.transform.render(`${round(v, this.round)}`);
+      this._value = round(v, this.round);
+    }
+    this.fire();
+  }
+
+  get value() {
+    return this._value;
+  }
+
+  parse(x) {
+    return this.float ? parseFloat(x) : parseInt(x);
+  }
+
+  valid(c) {
+    return c === `-` || c === `.` && this.float || isNumber.test(c)
+  }
+
+  reset() {
+    this.typed = ``;
+    this.value = ``;
+    this.fire();
+    this.render();
+  }
+
+  exit() {
+    this.abort();
+  }
+
+  abort() {
+    let x = this.value;
+    this.value = x !== `` ? x : this.initial;
+    this.done = this.aborted = true;
+    this.error = false;
+    this.fire();
+    this.render();
+    this.out.write(`\n`);
+    this.close();
+  }
+
+  async validate() {
+    let valid = await this.validator(this.value);
+    if (typeof valid === `string`) {
+      this.errorMsg = valid;
+      valid = false;
+    }
+    this.error = !valid;
+  }
+
+  async submit() {
+    await this.validate();
+    if (this.error) {
+      this.color = `red`;
+      this.fire();
+      this.render();
+      return;
+    }
+    let x = this.value;
+    this.value = x !== `` ? x : this.initial;
+    this.done = true;
+    this.aborted = false;
+    this.error = false;
+    this.fire();
+    this.render();
+    this.out.write(`\n`);
+    this.close();
+  }
+
+  up() {
+    this.typed = ``;
+    if(this.value === '') {
+      this.value = this.min - this.inc;
+    }
+    if (this.value >= this.max) return this.bell();
+    this.value += this.inc;
+    this.color = `cyan`;
+    this.fire();
+    this.render();
+  }
+
+  down() {
+    this.typed = ``;
+    if(this.value === '') {
+      this.value = this.min + this.inc;
+    }
+    if (this.value <= this.min) return this.bell();
+    this.value -= this.inc;
+    this.color = `cyan`;
+    this.fire();
+    this.render();
+  }
+
+  delete() {
+    let val = this.value.toString();
+    if (val.length === 0) return this.bell();
+    this.value = this.parse((val = val.slice(0, -1))) || ``;
+    if (this.value !== '' && this.value < this.min) {
+      this.value = this.min;
+    }
+    this.color = `cyan`;
+    this.fire();
+    this.render();
+  }
+
+  next() {
+    this.value = this.initial;
+    this.fire();
+    this.render();
+  }
+
+  _(c, key) {
+    if (!this.valid(c)) return this.bell();
+
+    const now = Date.now();
+    if (now - this.lastHit > 1000) this.typed = ``; // 1s elapsed
+    this.typed += c;
+    this.lastHit = now;
+    this.color = `cyan`;
+
+    if (c === `.`) return this.fire();
+
+    this.value = Math.min(this.parse(this.typed), this.max);
+    if (this.value > this.max) this.value = this.max;
+    if (this.value < this.min) this.value = this.min;
+    this.fire();
+    this.render();
+  }
+
+  render() {
+    if (this.closed) return;
+    if (!this.firstRender) {
+      if (this.outputError)
+        this.out.write(cursor.down(lines(this.outputError, this.out.columns) - 1) + clear(this.outputError, this.out.columns));
+      this.out.write(clear(this.outputText, this.out.columns));
+    }
+    super.render();
+    this.outputError = '';
+
+    // Print prompt
+    this.outputText = [
+      style.symbol(this.done, this.aborted),
+      color.bold(this.msg),
+      style.delimiter(this.done),
+      !this.done || (!this.done && !this.placeholder)
+          ? color[this.color]().underline(this.rendered) : this.rendered
+    ].join(` `);
+
+    // Print error
+    if (this.error) {
+      this.outputError += this.errorMsg.split(`\n`)
+          .reduce((a, l, i) => a + `\n${i ? ` ` : figures.pointerSmall} ${color.red().italic(l)}`, ``);
+    }
+
+    this.out.write(erase.line + cursor.to(0) + this.outputText + cursor.save + this.outputError + cursor.restore);
+  }
+}
+
+module.exports = NumberPrompt;