/**
 * From https://en.wikipedia.org/wiki/User:Nageh/mathJax.js
 */

if ( typeof mathJax === 'undefined' ) {
  mathJax = {};
}

mathJax.version = '0.2';

mathJax.loaded = false;

mathJax.Config = function() {
  MathJax.Hub.Config({
    root: mediaWiki.config.get('wgExtensionAssetsPath') + '/Math/modules/MathJax',
    config: ['TeX-AMS-texvc_HTML.js'],
    'v1.0-compatible': false,
    styles: { '.mtext': { 'font-family': 'sans-serif ! important', 'font-size': '80%' } },
    displayAlign: 'left',
    menuSettings: { zoom: 'Click' },
    'HTML-CSS': { imageFont: null, availableFonts: ['TeX'] }
  });
  MathJax.OutputJax.fontDir = mathJax.fontDir = mediaWiki.config.get('wgExtensionAssetsPath') + '/Math/modules/MathJax/fonts';
};

mathJax.Load = function(element) {
  if (this.loaded) {
    return true;
  }

  // create configuration element
  var config = 'mathJax.Config();';
  var script = document.createElement( 'script' );
  script.setAttribute( 'type', 'text/x-mathjax-config' );
  if ( window.opera ) {
    script.innerHTML = config;
  } else {
    script.text = config;
  }
  document.getElementsByTagName('head')[0].appendChild( script );

  // create startup element
  mediaWiki.loader.load('ext.math.mathjax');

  this.loaded = true;

  return false;
};

mathJax.Init = function() {
  this.Load( document.getElementById('bodyContent') || document.body );

  // compatibility with wikEd
  if ( typeof(wikEd) == 'undefined' ) {
    wikEd = {};
  }
  if ( typeof(wikEd.config) == 'undefined' ) {
    wikEd.config = {};
  }
  if ( typeof(wikEd.config.previewHook) == 'undefined' ) {
    wikEd.config.previewHook = [];
  }
  wikEd.config.previewHook.push( function(){
    if (window.mathJax.Load(document.getElementById('wikEdPreviewBox') || document.body)) {
      MathJax.Hub.Queue(['Typeset', MathJax.Hub, 'wikEdPreviewBox']);
    }
  } );

  // compatibility with ajaxPreview
  this.oldAjaxPreviewExec = window.ajaxPreviewExec;
  window.ajaxPreviewExec = function(previewArea) {
    if ( typeof(mathJax.oldAjaxPreviewExec) !== 'undefined' ) {
      mathJax.oldAjaxPreviewExec(previewArea);
    }
    if ( mathJax.Load(previewArea) ) {
      MathJax.Hub.Queue( ['Typeset', MathJax.Hub, previewArea] );
    }
  };
};

jQuery( document ).ready( function() {
	mathJax.Init();
} );