@coat/cli/build/ui/center-text.js

TODO: See #3

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.centerText = centerText;
var _stripAnsi = _interopRequireDefault(require("strip-ansi"));
var _getUsableTerminalSize = require("./get-usable-terminal-size");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
 * Centers all lines in the input text within the specified width.
 * Can handle colored text as well.
 *
 * @param text The line(s) that should be centered
 * @param width The full string width that should be filled
 */
function centerText(text, width) {
  // The max width should be limited to the current terminal size, in case
  // the passed width is larger
  const maxWidth = Math.min((0, _getUsableTerminalSize.getUsableTerminalSize)(process.stdout).width, width);
  const lines = text.split("\n");
  return lines.map(line => {
    // Calculate the necessary white space to
    // fill the line until the desired width
    const lineWhiteSpaceLength = (maxWidth - (0, _stripAnsi.default)(line).length) / 2;

    // Create the white space by repeating a space.
    // If the line is longer than the width, an empty string is created
    const lineWhiteSpace = " ".repeat(Math.max(0, lineWhiteSpaceLength));

    // Place the line within whitespace
    return `${lineWhiteSpace}${line}${lineWhiteSpace}`;
  }).join("\n");
}