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node_modules/enquirer/lib/ansi.js

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+'use strict';
+
+const isTerm = process.env.TERM_PROGRAM === 'Apple_Terminal';
+const stripAnsi = require('strip-ansi');
+const utils = require('./utils');
+const ansi = module.exports = exports;
+const ESC = '\u001b[';
+const BEL = '\u0007';
+let hidden = false;
+
+const code = ansi.code = {
+  bell: BEL,
+  beep: BEL,
+  beginning: `${ESC}G`,
+  down: `${ESC}J`,
+  esc: ESC,
+  getPosition: `${ESC}6n`,
+  hide: `${ESC}?25l`,
+  line: `${ESC}2K`,
+  lineEnd: `${ESC}K`,
+  lineStart: `${ESC}1K`,
+  restorePosition: ESC + (isTerm ? '8' : 'u'),
+  savePosition: ESC + (isTerm ? '7' : 's'),
+  screen: `${ESC}2J`,
+  show: `${ESC}?25h`,
+  up: `${ESC}1J`
+};
+
+const cursor = ansi.cursor = {
+  get hidden() {
+    return hidden;
+  },
+
+  hide() {
+    hidden = true;
+    return code.hide;
+  },
+  show() {
+    hidden = false;
+    return code.show;
+  },
+
+  forward: (count = 1) => `${ESC}${count}C`,
+  backward: (count = 1) => `${ESC}${count}D`,
+  nextLine: (count = 1) => `${ESC}E`.repeat(count),
+  prevLine: (count = 1) => `${ESC}F`.repeat(count),
+
+  up: (count = 1) => count ? `${ESC}${count}A` : '',
+  down: (count = 1) => count ? `${ESC}${count}B` : '',
+  right: (count = 1) => count ? `${ESC}${count}C` : '',
+  left: (count = 1) => count ? `${ESC}${count}D` : '',
+
+  to(x, y) {
+    return y ? `${ESC}${y + 1};${x + 1}H` : `${ESC}${x + 1}G`;
+  },
+
+  move(x = 0, y = 0) {
+    let res = '';
+    res += (x < 0) ? cursor.left(-x) : (x > 0) ? cursor.right(x) : '';
+    res += (y < 0) ? cursor.up(-y) : (y > 0) ? cursor.down(y) : '';
+    return res;
+  },
+  strLen(str) {
+    // to suport chinese
+    var realLength = 0, len = str.length, charCode = -1;
+    for (var i = 0; i < len; i++) {
+      charCode = str.charCodeAt(i);
+      if (charCode >= 0 && charCode <= 128) realLength += 1;
+      else realLength += 2;
+    }
+    return realLength;
+  },
+  restore(state = {}) {
+    let { after, cursor, initial, input, prompt, size, value } = state;
+    initial = utils.isPrimitive(initial) ? String(initial) : '';
+    input = utils.isPrimitive(input) ? String(input) : '';
+    value = utils.isPrimitive(value) ? String(value) : '';
+
+    if (size) {
+      let codes = ansi.cursor.up(size) + ansi.cursor.to(this.strLen(prompt));
+      let diff = input.length - cursor;
+      if (diff > 0) {
+        codes += ansi.cursor.left(diff);
+      }
+      return codes;
+    }
+
+    if (value || after) {
+      let pos = (!input && !!initial) ? - this.strLen(initial) : -this.strLen(input) + cursor;
+      if (after) pos -= this.strLen(after);
+      if (input === '' && initial && !prompt.includes(initial)) {
+        pos += this.strLen(initial);
+      }
+      return ansi.cursor.move(pos);
+    }
+  }
+};
+
+const erase = ansi.erase = {
+  screen: code.screen,
+  up: code.up,
+  down: code.down,
+  line: code.line,
+  lineEnd: code.lineEnd,
+  lineStart: code.lineStart,
+  lines(n) {
+    let str = '';
+    for (let i = 0; i < n; i++) {
+      str += ansi.erase.line + (i < n - 1 ? ansi.cursor.up(1) : '');
+    }
+    if (n) str += ansi.code.beginning;
+    return str;
+  }
+};
+
+ansi.clear = (input = '', columns = process.stdout.columns) => {
+  if (!columns) return erase.line + cursor.to(0);
+  let width = str => [...stripAnsi(str)].length;
+  let lines = input.split(/\r?\n/);
+  let rows = 0;
+  for (let line of lines) {
+    rows += 1 + Math.floor(Math.max(width(line) - 1, 0) / columns);
+  }
+  return (erase.line + cursor.prevLine()).repeat(rows - 1) + erase.line + cursor.to(0);
+};