index.js

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.shouldHighlight = shouldHighlight;
exports.getChalk = getChalk;
exports.default = highlight;

function _jsTokens() {
  const data = _interopRequireWildcard(require("js-tokens"));

  _jsTokens = function () {
    return data;
  };

  return data;
}

function _esutils() {
  const data = _interopRequireDefault(require("esutils"));

  _esutils = function () {
    return data;
  };

  return data;
}

function _chalk() {
  const data = _interopRequireDefault(require("chalk"));

  _chalk = function () {
    return data;
  };

  return data;
}

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = Object.defineProperty && Object.getOwnPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : {}; if (desc.get || desc.set) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } } newObj.default = obj; return newObj; } }

function getDefs(chalk) {
  return {
    keyword: chalk.cyan,
    capitalized: chalk.yellow,
    jsx_tag: chalk.yellow,
    punctuator: chalk.yellow,
    number: chalk.magenta,
    string: chalk.green,
    regex: chalk.magenta,
    comment: chalk.grey,
    invalid: chalk.white.bgRed.bold
  };
}

const NEWLINE = /\r\n|[\n\r\u2028\u2029]/;
const JSX_TAG = /^[a-z][\w-]*$/i;
const BRACKET = /^[()[\]{}]$/;

function getTokenType(match) {
  const [offset, text] = match.slice(-2);
  const token = (0, _jsTokens().matchToToken)(match);

  if (token.type === "name") {
    if (_esutils().default.keyword.isReservedWordES6(token.value)) {
      return "keyword";
    }

    if (JSX_TAG.test(token.value) && (text[offset - 1] === "<" || text.substr(offset - 2, 2) == "</")) {
      return "jsx_tag";
    }

    if (token.value[0] !== token.value[0].toLowerCase()) {
      return "capitalized";
    }
  }

  if (token.type === "punctuator" && BRACKET.test(token.value)) {
    return "bracket";
  }

  if (token.type === "invalid" && (token.value === "@" || token.value === "#")) {
    return "punctuator";
  }

  return token.type;
}

function highlightTokens(defs, text) {
  return text.replace(_jsTokens().default, function (...args) {
    const type = getTokenType(args);
    const colorize = defs[type];

    if (colorize) {
      return args[0].split(NEWLINE).map(str => colorize(str)).join("\n");
    } else {
      return args[0];
    }
  });
}

function shouldHighlight(options) {
  return _chalk().default.supportsColor || options.forceColor;
}

function getChalk(options) {
  let chalk = _chalk().default;

  if (options.forceColor) {
    chalk = new (_chalk().default.constructor)({
      enabled: true,
      level: 1
    });
  }

  return chalk;
}

function highlight(code, options = {}) {
  if (shouldHighlight(options)) {
    const chalk = getChalk(options);
    const defs = getDefs(chalk);
    return highlightTokens(defs, code);
  } else {
    return code;
  }
}