// all utility functions go in here

function makeUrl(page, query, html_friendly)

{

  url = contentPath+page;

  if(url.indexOf('?') > 0) sep = '&';

  else sep = '?';

  if(query)

  {

    url = url + sep + query;

  }

  if(html_friendly)

  {

    url = url.replace('&', '&');

    url = url.replace('<', '&lt;');

    url = url.replace('>', '>');

  }

  return url;

}

function makeUrlNS(namespace, page, query, html_friendly)

{

  var url = contentPath+namespace_list[namespace]+(page.replace(/ /g, '_'));

  if(url.indexOf('?') > 0) sep = '&';

  else sep = '?';

  if(query)

  {

    url = url + sep + query;

  }

  if(html_friendly)

  {

    url = url.replace('&', '&');

    url = url.replace('<', '&lt;');

    url = url.replace('>', '>');

  }

  return append_sid(url);

}

function strToPageID(string)

{

  // Convert Special:UploadFile to ['UploadFile', 'Special'], but convert 'Image:Enano.png' to ['Enano.png', 'File']

  for(var i in namespace_list)

    if(namespace_list[i] != '')

      if(namespace_list[i] == string.substr(0, namespace_list[i].length))

        return [string.substr(namespace_list[i].length), i];

  return [string, 'Article'];

}

function append_sid(url)

{

  sep = ( url.indexOf('?') > 0 ) ? '&' : '?';

  if(ENANO_SID.length > 10)

  {

    url = url + sep + 'auth=' + ENANO_SID;

    sep = '&';

  }

  if ( pagepass.length > 0 )

  {

    url = url + sep + 'pagepass=' + pagepass;

  }

  return url;

}

var stdAjaxPrefix = append_sid(scriptPath+'/ajax.php?title='+title);

/**

 * Core AJAX library

 */

function ajaxMakeXHR()

{

  var ajax;

  if (window.XMLHttpRequest) {

    ajax = new XMLHttpRequest();

  } else {

    if (window.ActiveXObject) {           

      ajax = new ActiveXObject("Microsoft.XMLHTTP");

    } else {

      alert('Enano client-side runtime error: No AJAX support, unable to continue');

      return;

    }

  }

  return ajax;

}

function ajaxGet(uri, f, call_editor_safe) {

  // Is the editor open?

  if ( editor_open && !call_editor_safe )

  {

    // Make sure the user is willing to close the editor

    var conf = confirm($lang.get('editor_msg_confirm_ajax'));

    if ( !conf )

    {

      // Kill off any "loading" windows, etc. and cancel the request

      unsetAjaxLoading();

      return false;

    }

    // The user allowed the editor to be closed. Reset flags and knock out the on-close confirmation.

    editor_open = false;

    enableUnload();

  }

  ajax = ajaxMakeXHR();

  if ( !ajax )

  {

    console.error('ajaxMakeXHR() failed');

    return false;

  }

  ajax.onreadystatechange = f;

  ajax.open('GET', uri, true);

  ajax.setRequestHeader( "If-Modified-Since", "Sat, 1 Jan 2000 00:00:00 GMT" );

  ajax.send(null);

}

function ajaxPost(uri, parms, f, call_editor_safe) {

  // Is the editor open?

  if ( editor_open && !call_editor_safe )

  {

    // Make sure the user is willing to close the editor

    var conf = confirm($lang.get('editor_msg_confirm_ajax'));

    if ( !conf )

    {

      // Kill off any "loading" windows, etc. and cancel the request

      unsetAjaxLoading();

      return false;

    }

    // The user allowed the editor to be closed. Reset flags and knock out the on-close confirmation.

    editor_open = false;

    enableUnload();

  }

  ajax = ajaxMakeXHR();

  if ( !ajax )

  {

    console.error('ajaxMakeXHR() failed');

    return false;

  }

  ajax.onreadystatechange = f;

  ajax.open('POST', uri, true);

  ajax.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

  // Setting Content-length in Safari triggers a warning

  if ( !is_Safari )

  {

    ajax.setRequestHeader("Content-length", parms.length);

  }

  ajax.setRequestHeader("Connection", "close");

  ajax.send(parms);

}

/**

 * Show a friendly error message depicting an AJAX response that is not valid JSON

 * @param string Response text

 * @param string Custom error message. If omitted, the default will be shown.

 */

function handle_invalid_json(response, customerror)

{

  var mainwin = $dynano('ajaxEditContainer').object;

  mainwin.innerHTML = '';

  // Title

  var h3 = document.createElement('h3');

  h3.appendChild(document.createTextNode('The site encountered an error while processing your request.'));

  mainwin.appendChild(h3);

  if ( typeof(customerror) == 'string' )

  {

    var el = document.createElement('p');

    el.appendChild(document.createTextNode(customerror));

    mainwin.appendChild(el);

  }

  else

  {

    customerror  = 'We unexpectedly received the following response from the server. The response should have been in the JSON ';

    customerror += 'serialization format, but the response wasn\'t composed only of the JSON response. There are three possible triggers ';

    customerror += 'for this problem:';

    var el = document.createElement('p');

    el.appendChild(document.createTextNode(customerror));

    mainwin.appendChild(el);

    var ul = document.createElement('ul');

    var li1 = document.createElement('li');

    var li2 = document.createElement('li');

    var li3 = document.createElement('li');

    li1.appendChild(document.createTextNode('The server sent back a bad HTTP response code and thus sent an error page instead of running Enano. This indicates a possible problem with your server, and is not likely to be a bug with Enano.'));

    var osc_exception = ( window.location.hostname == 'demo.opensourcecms.com' ) ? ' This is KNOWN to be the case with the OpenSourceCMS.com demo version of Enano.' : '';

    li2.appendChild(document.createTextNode('The server sent back the expected JSON response, but also injected some code into the response that should not be there. Typically this consists of advertisement code. In this case, the administrator of this site will have to contact their web host to have advertisements disabled.' + osc_exception));

    li3.appendChild(document.createTextNode('It\'s possible that Enano triggered a PHP error or warning. In this case, you may be looking at a bug in Enano.'));

    ul.appendChild(li1);

    ul.appendChild(li2);

    ul.appendChild(li3);

    mainwin.appendChild(ul);

  }

  var p2 = document.createElement('p');

  p2.appendChild(document.createTextNode('The response received from the server is as follows:'));

  mainwin.appendChild(p2);

  var pre = document.createElement('pre');

  pre.appendChild(document.createTextNode(response));

  mainwin.appendChild(pre);

  var p3 = document.createElement('p');

  p3.appendChild(document.createTextNode('You may also choose to view the response as HTML. '));

  var a = document.createElement('a');

  a.appendChild(document.createTextNode('View as HTML...'));

  a._resp = response;

  a.id = 'invalidjson_link';

  a.onclick = function()

  {

    var mb = new MessageBox(MB_YESNO | MB_ICONEXCLAMATION, 'Do you really want to view this response as HTML?', 'If the response was changed during transmission to include malicious code, you may be allowing that malicious code to run by viewing the response as HTML. Only do this if you have reviewed the response text and have found no suspicious code in it.');

    mb.onclick['Yes'] = function()

    {

      var html = $dynano('invalidjson_link').object._resp;

      var win = window.open('about:blank', 'invalidjson_htmlwin', 'width=550,height=400,status=no,toolbars=no,toolbar=no,address=no,scroll=yes');

      win.document.write(html);

    }

    return false;

  }

  a.href = '#';

  p3.appendChild(a);

  mainwin.appendChild(p3);

}

function ajaxEscape(text)

{

  /*

  text = escape(text);

  text = text.replace(/\+/g, '%2B', text);

  */

  text = window.encodeURIComponent(text);

  return text;

}

/**

 * String functions

 */

// Equivalent to PHP trim() function

function trim(text)

{

  text = text.replace(/^([\s]+)/, '');

  text = text.replace(/([\s]+)$/, '');

  return text;

}

// Equivalent to PHP implode() function

function implode(chr, arr)

{

  if ( typeof ( arr.toJSONString ) == 'function' )

    delete(arr.toJSONString);

  var ret = '';

  var c = 0;

  for ( var i in arr )

  {

    if(i=='toJSONString')continue;

    if ( c > 0 )

      ret += chr;

    ret += arr[i];

    c++;

  }

  return ret;

}

function form_fetch_field(form, name)

{

  var fields = form.getElementsByTagName('input');

  if ( fields.length < 1 )

    return false;

  for ( var i = 0; i < fields.length; i++ )

  {

    var field = fields[i];

    if ( field.name == name )

      return field;

  }

  return false;

}

function get_parent_form(o)

{

  if ( !o.parentNode )

    return false;

  if ( o.tagName == 'FORM' )

    return o;

  var p = o.parentNode;

  while(true)

  {

    if ( p.tagName == 'FORM' )

      return p;

    else if ( !p )

      return false;

    else

      p = p.parentNode;

  }

}

function findParentForm(o)

{

  return get_parent_form(o);

}

function domObjChangeOpac(opacity, id) {

    var object = id.style;

    object.opacity = (opacity / 100);

    object.MozOpacity = (opacity / 100);

    object.KhtmlOpacity = (opacity / 100);

    object.filter = "alpha(opacity=" + opacity + ")";

}

function getScrollOffset()

{

  var position;

  if (self.pageYOffset)

  {

    position = self.pageYOffset;

  }

  else if (document.documentElement && document.documentElement.scrollTop)

  {

    position = document.documentElement.scrollTop;

  }

  else if (document.body)

  {

    position = document.body.scrollTop;

  }

  return position;

}

// Function to fade classes info-box, warning-box, error-box, etc.

function fadeInfoBoxes()

{

  var divs = new Array();

  d = document.getElementsByTagName('div');

  j = 0;

  for(var i in d)

  {

    if ( !d[i] )

      continue;

    if ( !d[i].tagName )

      continue;

    if(d[i].className=='info-box' || d[i].className=='error-box' || d[i].className=='warning-box' || d[i].className=='question-box')

    {

      divs[j] = d[i];

      j++;

    }

  }

  if(divs.length < 1) return;

  load_component('fat');

  for(i in divs)

  {

    if(!divs[i].id) divs[i].id = 'autofade_'+Math.floor(Math.random() * 100000);

    switch(divs[i].className)

    {

      case 'info-box':

      default:

        from = '#3333FF';

        break;

      case 'error-box':

        from = '#FF3333';

        break;

      case 'warning-box':

        from = '#FFFF33';

        break;

      case 'question-box':

        from = '#33FF33';

        break;

    }

    Fat.fade_element(divs[i].id,30,2000,from,Fat.get_bgcolor(divs[i].id));

  }

}

addOnloadHook(fadeInfoBoxes);

// Alpha fades

function opacity(id, opacStart, opacEnd, millisec)

{

    var object = document.getElementById(id);

    domOpacity(object, opacStart, opacEnd, millisec);

}

var opacityDOMCache = new Object();

function domOpacity(obj, opacStart, opacEnd, millisec) {

    //speed for each frame

    var speed = Math.round(millisec / 100);

    var timer = 0;

    // unique ID for this animation

    var uniqid = Math.floor(Math.random() * 1000000);

    opacityDOMCache[uniqid] = obj;

    //determine the direction for the blending, if start and end are the same nothing happens

    if(opacStart > opacEnd) {

        for(i = opacStart; i >= opacEnd; i--) {

            setTimeout("var obj = opacityDOMCache["+uniqid+"]; domObjChangeOpac(" + i + ",obj)",(timer * speed));

            timer++;

        }

    } else if(opacStart < opacEnd) {

        for(i = opacStart; i <= opacEnd; i++)

            {

            setTimeout("var obj = opacityDOMCache["+uniqid+"]; domObjChangeOpac(" + i + ",obj)",(timer * speed));

            timer++;

        }

    }

    setTimeout("delete(opacityDOMCache["+uniqid+"]);",(timer * speed));

}

// change the opacity for different browsers

function changeOpac(opacity, id)

{

  var object = document.getElementById(id);

  return domObjChangeOpac(opacity, object);

}

// draw a white ajax-ey "loading" box over an object

function whiteOutElement(el)

{

  var top = $(el).Top();

  var left = $(el).Left();

  var width = $(el).Width();

  var height = $(el).Height();

  var blackout = document.createElement('div');

  blackout.style.position = 'absolute';

  blackout.style.top = top + 'px';

  blackout.style.left = left + 'px';

  blackout.style.width = width + 'px';

  blackout.style.height = height + 'px';

  blackout.style.backgroundColor = '#FFFFFF';

  domObjChangeOpac(60, blackout);

  blackout.style.backgroundImage = 'url(' + scriptPath + '/includes/clientside/tinymce/themes/advanced/skins/default/img/progress.gif)';

  blackout.style.backgroundPosition = 'center center';

  blackout.style.backgroundRepeat = 'no-repeat';

  blackout.style.zIndex = getHighestZ() + 2;

  var body = document.getElementsByTagName('body')[0];

  body.appendChild(blackout);

  return blackout;

}

/**

 * Take a div generated by whiteOutElement() and report success using the glossy "check" graphic. Sets the image, then

 * briefly fades in, then fades out and destroys the box so as to re-allow control over the underlying element

 */

function whiteOutReportSuccess(whitey)

{

  // fade the status indicator in and then out

  whitey.style.backgroundImage = 'url(' + scriptPath + '/images/check.png)';

  domOpacity(whitey, 60, 80, 500);

  setTimeout(function()

    {

      domOpacity(whitey, 60, 0, 500);

    }, 750);

  setTimeout(function()

    {

      whitey.parentNode.removeChild(whitey);

    }, 1250);

}

// other DHTML functions

function fetch_offset(obj)

{

  var left_offset = obj.offsetLeft;

  var top_offset = obj.offsetTop;

  while ((obj = obj.offsetParent) != null) {

    left_offset += obj.offsetLeft;

    top_offset += obj.offsetTop;

  }

  return { 'left' : left_offset, 'top' : top_offset };

}

function fetch_dimensions(o) {

  var w = o.offsetWidth;

  var h = o.offsetHeight;

  return { 'w' : w, 'h' : h };

}

function findParentForm(o)

{

  if ( o.tagName == 'FORM' )

    return o;

  while(true)

  {

    o = o.parentNode;

    if ( !o )

      return false;

    if ( o.tagName == 'FORM' )

      return o;

  }

  return false;

}

function bannerOn(text)

{

  darken(true);

  var thediv = document.createElement('div');

  thediv.className = 'mdg-comment';

  thediv.style.padding = '0';

  thediv.style.marginLeft = '0';

  thediv.style.position = 'absolute';

  thediv.style.display = 'none';

  thediv.style.padding = '4px';

  thediv.style.fontSize = '14pt';

  thediv.id = 'mdgDynamic_bannerDiv_'+Math.floor(Math.random() * 1000000);

  thediv.innerHTML = text;

  var body = document.getElementsByTagName('body');

  body = body[0];

  body.appendChild(thediv);

  body.style.cursor = 'wait';

  thediv.style.display = 'block';

  dim = fetch_dimensions(thediv);

  thediv.style.display = 'none';

  bdim = { 'w' : getWidth(), 'h' : getHeight() };

  so = getScrollOffset();

  var left = (bdim['w'] / 2) - ( dim['w'] / 2 );

  var top  = (bdim['h'] / 2);

  top  = top - ( dim['h'] / 2 );

  top = top + so;