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node_modules/prompts/dist/elements/select.js

@@ -0,0 +1,143 @@
+'use strict';
+
+const color = require('kleur');
+
+const Prompt = require('./prompt');
+
+const _require = require('../util'),
+      style = _require.style,
+      clear = _require.clear,
+      figures = _require.figures;
+
+const _require2 = require('sisteransi'),
+      erase = _require2.erase,
+      cursor = _require2.cursor;
+/**
+ * SelectPrompt Base Element
+ * @param {Object} opts Options
+ * @param {String} opts.message Message
+ * @param {Array} opts.choices Array of choice objects
+ * @param {String} [opts.hint] Hint to display
+ * @param {Number} [opts.initial] Index of default value
+ * @param {Stream} [opts.stdin] The Readable stream to listen to
+ * @param {Stream} [opts.stdout] The Writable stream to write readline data to
+ */
+
+
+class SelectPrompt extends Prompt {
+  constructor(opts = {}) {
+    super(opts);
+    this.msg = opts.message;
+    this.hint = opts.hint || '- Use arrow-keys. Return to submit.';
+    this.warn = opts.warn || '- This option is disabled';
+    this.cursor = opts.initial || 0;
+    this.choices = opts.choices.map((ch, idx) => {
+      if (typeof ch === 'string') ch = {
+        title: ch,
+        value: idx
+      };
+      return {
+        title: ch && (ch.title || ch.value || ch),
+        value: ch && (ch.value || idx),
+        selected: ch && ch.selected,
+        disabled: ch && ch.disabled
+      };
+    });
+    this.value = (this.choices[this.cursor] || {}).value;
+    this.clear = clear('');
+    this.render();
+  }
+
+  moveCursor(n) {
+    this.cursor = n;
+    this.value = this.choices[n].value;
+    this.fire();
+  }
+
+  reset() {
+    this.moveCursor(0);
+    this.fire();
+    this.render();
+  }
+
+  abort() {
+    this.done = this.aborted = true;
+    this.fire();
+    this.render();
+    this.out.write('\n');
+    this.close();
+  }
+
+  submit() {
+    if (!this.selection.disabled) {
+      this.done = true;
+      this.aborted = false;
+      this.fire();
+      this.render();
+      this.out.write('\n');
+      this.close();
+    } else this.bell();
+  }
+
+  first() {
+    this.moveCursor(0);
+    this.render();
+  }
+
+  last() {
+    this.moveCursor(this.choices.length - 1);
+    this.render();
+  }
+
+  up() {
+    if (this.cursor === 0) return this.bell();
+    this.moveCursor(this.cursor - 1);
+    this.render();
+  }
+
+  down() {
+    if (this.cursor === this.choices.length - 1) return this.bell();
+    this.moveCursor(this.cursor + 1);
+    this.render();
+  }
+
+  next() {
+    this.moveCursor((this.cursor + 1) % this.choices.length);
+    this.render();
+  }
+
+  _(c, key) {
+    if (c === ' ') return this.submit();
+  }
+
+  get selection() {
+    return this.choices[this.cursor];
+  }
+
+  render() {
+    if (this.closed) return;
+    if (this.firstRender) this.out.write(cursor.hide);else this.out.write(erase.lines(this.choices.length + 1));
+    super.render(); // Print prompt
+
+    this.out.write([style.symbol(this.done, this.aborted), color.bold(this.msg), style.delimiter(false), this.done ? this.selection.title : this.selection.disabled ? color.yellow(this.warn) : color.gray(this.hint)].join(' ')); // Print choices
+
+    if (!this.done) {
+      this.out.write('\n' + this.choices.map((v, i) => {
+        let title, prefix;
+
+        if (v.disabled) {
+          title = this.cursor === i ? color.gray().underline(v.title) : color.strikethrough().gray(v.title);
+          prefix = this.cursor === i ? color.bold().gray(figures.pointer) + ' ' : '  ';
+        } else {
+          title = this.cursor === i ? color.cyan().underline(v.title) : v.title;
+          prefix = this.cursor === i ? color.cyan(figures.pointer) + ' ' : '  ';
+        }
+
+        return `${prefix} ${title}`;
+      }).join('\n'));
+    }
+  }
+
+}
+
+module.exports = SelectPrompt;