cullmann.io/themes/CodeIT/assets/lib/lunr/lunr.th.js

/*!
 * Lunr languages, `Thai` language
 * https://github.com/MihaiValentin/lunr-languages
 *
 * Copyright 2017, Keerati Thiwanruk
 * http://www.mozilla.org/MPL/
 */
/*!
 * based on
 * Snowball JavaScript Library v0.3
 * http://code.google.com/p/urim/
 * http://snowball.tartarus.org/
 *
 * Copyright 2010, Oleg Mazko
 * http://www.mozilla.org/MPL/
 */

/**
 * export the module via AMD, CommonJS or as a browser global
 * Export code from https://github.com/umdjs/umd/blob/master/returnExports.js
 */

(function (root, factory) {
  if (typeof define === "function" && define.amd) {
    // AMD. Register as an anonymous module.
    define(factory);
  } else if (typeof exports === "object") {
    /**
     * Node. Does not work with strict CommonJS, but
     * only CommonJS-like environments that support module.exports,
     * like Node.
     */
    module.exports = factory();
  } else {
    // Browser globals (root is window)
    factory()(root.lunr);
  }
})(this, function () {
  /**
   * Just return a value to define the module export.
   * This example returns an object, but the module
   * can return a function as the exported value.
   */
  return function (lunr) {
    /* throw error if lunr is not yet included */
    if ("undefined" === typeof lunr) {
      throw new Error(
        "Lunr is not present. Please include / require Lunr before this script."
      );
    }

    /* throw error if lunr stemmer support is not yet included */
    if ("undefined" === typeof lunr.stemmerSupport) {
      throw new Error(
        "Lunr stemmer support is not present. Please include / require Lunr stemmer support before this script."
      );
    }

    /*
    Thai tokenization is the same to Japanense, which does not take into account spaces.
    So, it uses the same logic to assign tokenization function due to different Lunr versions.
    */
    var isLunr2 = lunr.version[0] == "2";

    /* register specific locale function */
    lunr.th = function () {
      this.pipeline.reset();
      this.pipeline.add(
        /*lunr.th.stopWordFilter,*/
        lunr.th.trimmer
      );

      if (isLunr2) {
        // for lunr version 2.0.0
        this.tokenizer = lunr.th.tokenizer;
      } else {
        if (lunr.tokenizer) {
          // for lunr version 0.6.0
          lunr.tokenizer = lunr.th.tokenizer;
        }
        if (this.tokenizerFn) {
          // for lunr version 0.7.0 -> 1.0.0
          this.tokenizerFn = lunr.th.tokenizer;
        }
      }
    };

    /* lunr trimmer function */
    lunr.th.wordCharacters = "[\u0e00-\u0e7f]";
    lunr.th.trimmer = lunr.trimmerSupport.generateTrimmer(
      lunr.th.wordCharacters
    );
    lunr.Pipeline.registerFunction(lunr.th.trimmer, "trimmer-th");

    var segmenter = lunr.wordcut;
    segmenter.init();
    lunr.th.tokenizer = function (obj) {
      //console.log(obj);
      if (!arguments.length || obj == null || obj == undefined) return [];
      if (Array.isArray(obj))
        return obj.map(function (t) {
          return isLunr2 ? new lunr.Token(t) : t;
        });

      var str = obj.toString().replace(/^\s+/, "");
      return segmenter.cut(str).split("|");
    };
  };
});