jlib-importtext.js -- JavaScript Library for SyntaxHighlighter form

jlib-importtext.js

// ================================================================
//  jlib-importtext.js -- JavaScript Library for SyntaxHighlighter form
// ================================================================
//  Written and revised by Yasuhiro (Spiegel) Arakawa, 2014
//     http://www.baldanders.info/spiegel/log2/000717.shtml
//     https://gist.github.com/spiegel-im-spiegel/8075979c314a417b96c2
//  This document code refer to JKL.ParseXML library.
//     http://www.kawa.net/works/js/jkl/parsexml.html
//  This document code is licensed under cc-license "CC-BY"
//     http://creativecommons.org/licenses/by/4.0/
// ================================================================
if ( typeof(JLIB) == 'undefined' ) JLIB = function() {};

// ================================================================
//  class: JLIB.ImportText
//    テキストファイルを読み込み、SyntaxHighlighter に準拠した
//    フォーマットで出力するだけの簡単なお仕事
//
//  param: url : URL (required)
//          id : node identify (required)

JLIB.ImportText = function (url, id) {

  this.url = url;
  this.id = id;
  this.classAttr = "brush:javascript html-script:true";
  this.title = ""

  this.http = new JLIB.HTTP(url, null, "GET", true);

  return this;
};

// コールバック関数をセットしてローダを呼ぶ
JLIB.ImportText.prototype.load = function() {

  var copy = this;
  this.http.callback_func = function() {
    var text = copy.http.responseText();
    var pre = document.createElement('pre');
    pre.className = copy.classAttr;
    pre.setAttribute('title', copy.title);
    pre.appendChild(document.createTextNode(text));
    var div = document.getElementById(copy.id);
    div.appendChild(pre);
  };

  this.http.load();
}

// ================================================================
//  class: JLIB.HTTP : XMLHttpRequest 制御
//
//  param:      url : URL (required)
//            query : string or null (default: null)
//           method : GET / POST (default: GET)
//         textmode : true or false (default: true)

JLIB.HTTP = function (url, query, method, textmode) {

  this.url = url;
  this.query = null;
  this.method = "GET";
  this.textmode = true;
  this.req = null;
  this.already_done = false;
  this.callback_func = null;

  if (arguments.length > 1) {
    this.query = query;
  }
  if (arguments.length > 2) {
    this.method = method;
  }
  if (arguments.length > 3) {
    this.textmode = textmode;
  }

  if (typeof(this.query) == "string") {
	this.method = "POST";
  }

  return this;
};

// ローダ本体
// XMLHttpRequest の onreadystatechange イベントでコールバック関数を起動する
JLIB.HTTP.prototype.load = function() {

  if (window.XMLHttpRequest) {
    this.req = new XMLHttpRequest();
  } else if (window.ActiveXObject) {
    var activex = "Microsoft.XMLHTTP";
    if (this.method == "GET" && this.textmode == false) {
      activex = "Microsoft.XMLDOM";
    }
    this.req = new ActiveXObject(activex);
  } else {
	return;
  }

  if (typeof(this.req.send) != "undefined") {
    this.req.open(this.method, this.url, true); //async mode
  }

  if (typeof(this.req.setRequestHeader) != "undefined") {
    this.req.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");
  }

  if (typeof(this.req.overrideMimeType) != "undefined" && this.textmode == false) {
    this.req.overrideMimeType("text/xml");
  }

  var copy = this;
  copy.already_done = false;
  var check_func = function () {
    if (copy.req.readyState == 4 && copy.req.status == 200){
      if (copy.already_done ==true) return;
      copy.already_done = true;
      if ( copy.callback_func != null ) {
        copy.callback_func();
      }
    }
  };
  this.req.onreadystatechange = check_func;

  if ( typeof(this.req.send) != "undefined" ) {
    this.req.send( this.query );
  } else if ( typeof(this.req.load) != "undefined" ) {
    this.req.async = true;
    this.req.load( this.url );
  }
}

//ロードしたテキスト情報を取得する
JLIB.HTTP.prototype.responseText = function() {
  if (this.req == null) return "";

  if (navigator.appVersion.match("KHTML")) {
    var esc = escape( this.req.responseText );
    if ( ! esc.match("%u") && esc.match("%") ) {
      return decodeURIComponent(esc);
    }
  }

  return this.req.responseText;
}