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

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+const color = require('kleur');
+const Prompt = require('./prompt');
+const { erase, cursor } = require('sisteransi');
+const { style, clear, lines, figures } = require('../util');
+
+/**
+ * TextPrompt Base Element
+ * @param {Object} opts Options
+ * @param {String} opts.message Message
+ * @param {String} [opts.style='default'] Render style
+ * @param {String} [opts.initial] Default value
+ * @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 TextPrompt extends Prompt {
+  constructor(opts={}) {
+    super(opts);
+    this.transform = style.render(opts.style);
+    this.scale = this.transform.scale;
+    this.msg = opts.message;
+    this.initial = opts.initial || ``;
+    this.validator = opts.validate || (() => true);
+    this.value = ``;
+    this.errorMsg = opts.error || `Please Enter A Valid Value`;
+    this.cursor = Number(!!this.initial);
+    this.cursorOffset = 0;
+    this.clear = clear(``, this.out.columns);
+    this.render();
+  }
+
+  set value(v) {
+    if (!v && this.initial) {
+      this.placeholder = true;
+      this.rendered = color.gray(this.transform.render(this.initial));
+    } else {
+      this.placeholder = false;
+      this.rendered = this.transform.render(v);
+    }
+    this._value = v;
+    this.fire();
+  }
+
+  get value() {
+    return this._value;
+  }
+
+  reset() {
+    this.value = ``;
+    this.cursor = Number(!!this.initial);
+    this.cursorOffset = 0;
+    this.fire();
+    this.render();
+  }
+
+  exit() {
+    this.abort();
+  }
+
+  abort() {
+    this.value = this.value || this.initial;
+    this.done = this.aborted = true;
+    this.error = false;
+    this.red = 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() {
+    this.value = this.value || this.initial;
+    this.cursorOffset = 0;
+    this.cursor = this.rendered.length;
+    await this.validate();
+    if (this.error) {
+      this.red = true;
+      this.fire();
+      this.render();
+      return;
+    }
+    this.done = true;
+    this.aborted = false;
+    this.fire();
+    this.render();
+    this.out.write('\n');
+    this.close();
+  }
+
+  next() {
+    if (!this.placeholder) return this.bell();
+    this.value = this.initial;
+    this.cursor = this.rendered.length;
+    this.fire();
+    this.render();
+  }
+
+  moveCursor(n) {
+    if (this.placeholder) return;
+    this.cursor = this.cursor+n;
+    this.cursorOffset += n;
+  }
+
+  _(c, key) {
+    let s1 = this.value.slice(0, this.cursor);
+    let s2 = this.value.slice(this.cursor);
+    this.value = `${s1}${c}${s2}`;
+    this.red = false;
+    this.cursor = this.placeholder ? 0 : s1.length+1;
+    this.render();
+  }
+
+  delete() {
+    if (this.isCursorAtStart()) return this.bell();
+    let s1 = this.value.slice(0, this.cursor-1);
+    let s2 = this.value.slice(this.cursor);
+    this.value = `${s1}${s2}`;
+    this.red = false;
+    if (this.isCursorAtStart()) {
+      this.cursorOffset = 0
+    } else {
+      this.cursorOffset++;
+      this.moveCursor(-1);
+    }
+    this.render();
+  }
+
+  deleteForward() {
+    if(this.cursor*this.scale >= this.rendered.length || this.placeholder) return this.bell();
+    let s1 = this.value.slice(0, this.cursor);
+    let s2 = this.value.slice(this.cursor+1);
+    this.value = `${s1}${s2}`;
+    this.red = false;
+    if (this.isCursorAtEnd()) {
+      this.cursorOffset = 0;
+    } else {
+      this.cursorOffset++;
+    }
+    this.render();
+  }
+
+  first() {
+    this.cursor = 0;
+    this.render();
+  }
+
+  last() {
+    this.cursor = this.value.length;
+    this.render();
+  }
+
+  left() {
+    if (this.cursor <= 0 || this.placeholder) return this.bell();
+    this.moveCursor(-1);
+    this.render();
+  }
+
+  right() {
+    if (this.cursor*this.scale >= this.rendered.length || this.placeholder) return this.bell();
+    this.moveCursor(1);
+    this.render();
+  }
+
+  isCursorAtStart() {
+    return this.cursor === 0 || (this.placeholder && this.cursor === 1);
+  }
+
+  isCursorAtEnd() {
+    return this.cursor === this.rendered.length || (this.placeholder && this.cursor === this.rendered.length + 1)
+  }
+
+  render() {
+    if (this.closed) return;
+    if (!this.firstRender) {
+      if (this.outputError)
+        this.out.write(cursor.down(lines(this.outputError, this.out.columns) - 1) + clear(this.outputError, this.out.columns));
+      this.out.write(clear(this.outputText, this.out.columns));
+    }
+    super.render();
+    this.outputError = '';
+
+    this.outputText = [
+      style.symbol(this.done, this.aborted),
+      color.bold(this.msg),
+      style.delimiter(this.done),
+      this.red ? color.red(this.rendered) : this.rendered
+    ].join(` `);
+
+    if (this.error) {
+      this.outputError += this.errorMsg.split(`\n`)
+          .reduce((a, l, i) => a + `\n${i ? ' ' : figures.pointerSmall} ${color.red().italic(l)}`, ``);
+    }
+
+    this.out.write(erase.line + cursor.to(0) + this.outputText + cursor.save + this.outputError + cursor.restore + cursor.move(this.cursorOffset, 0));
+  }
+}
+
+module.exports = TextPrompt;