/* TwoColumns, version [0.0.5]

Documentation: Wikipedia:WikiProject User scripts/Scripts/TwoColumns

*/



if (mw.config.get('wgAction') == 'view' && mw.config.get('wgCanonicalNamespace')=='')  addOnloadHook(fr_format)



var fr_columns;

var imgRegExp= /(thumb|frame)/i;

var trashNodes;

function fr_format() {

     fr_addButton();

     fr_columns=fr_getCookie ('fr_columns'); if (! (0<1*fr_columns)) fr_columns=1;

     trashNodes=new Array;

     if (fr_columns==1) return;

     var bodyContent= document.getElementById('bodyContent');

     if (! bodyContent || ! bodyContent.innerHTML || bodyContent.innerHTML=='') return;



     var allNodes=bodyContent.childNodes;

     var group=new Array, node, groupArea=0;

     for (var i = allNodes.length-1; 0 <= i; i--) {

       node=allNodesi];

       var pre= node.tagName=="PRE" || (node.tagName=="DIV" && node.childNodes1 && node.childNodes1].tagName=='PRE') 

       if (node.nodeValue && node.nodeValue.substr(0,1)=="\n") {



//       } else if (node.tagName=="p" || node.tagName=="P" || node.tagName=="ul" || node.tagName=="UL" ) {

       } else if (node.tagName && node.tagName.substr(0,1) !="H" && node.tagName.substr(0,5) !="TABLE" && node.tagName.substr(0,5) !="SCRIPT" && node.style.MozColumnCount<=0 && ! pre) { //everything but H

         group.push(node);

         groupArea += node.clientHeight * node.clientWidth;

       } else {

          if (node.tagName && node.tagName.substr(0,1) =="H") {

            var prevNode=node;

            var count=0;

            do {

              do {

                prevNode=prevNode.previousSibling;count++;

              } while (prevNode && (prevNode.clientHeight==0 || prevNode.clientHeight=== undefined));

              if (prevNode && prevNode.className && imgRegExp.test(prevNode.className)) {

                group.push(prevNode); i=i-count;count=0;

                groupArea += prevNode.clientHeight * prevNode.clientWidth;

              }

            } while (prevNode && prevNode.className && imgRegExp.test(prevNode.className))

         }

         if (0<group.length) fr_layoutDiv (group, groupArea);

         group=new Array; groupArea=0;

       }

     }

     

     for (var i=trashNodes.length-1; 0<=i;i--) {

      trashNodesi].parentNode.removeChild(trashNodesi]);

     }

}



function fr_layoutDiv (aGroup, groupArea) {

  var contentWidth=aGroup0].parentNode.clientWidth;

  if (groupArea < 100 * contentWidth) return;

  var start=0, stop=aGroup.length-1;

  var pieces=Math.round(groupArea / (window.innerHeight * contentWidth)+0.5);

  var targetArea=groupArea/ pieces; 

  var targetHeight= (pieces==1) ? window.innerHeight : targetArea / contentWidth;

  var divArea=0, first=true, imgHeight=0;

  for (var i = stop; 0 <= i; i--) {

     if (aGroupi].className && imgRegExp.test(aGroupi].className)) {

       imgHeight +=aGroupi].clientHeight;

     }

    divArea += aGroupi].clientHeight * aGroupi].clientWidth;

    if (targetArea < divArea || targetHeight < imgHeight) { 

      fr_createDiv(aGroup, i+1,stop,fr_columns,first); 

      first=false;

      stop=i; 

       if (aGroupi].className && imgRegExp.test(aGroupi].className)) {

         imgHeight =aGroupi].clientHeight;

       } else {

         imgHeight =0;

       }

      divArea = aGroupi].clientHeight * aGroupi].clientWidth;

    }

  }

  if (0<=stop) {

    divArea=0;

    for (i=stop; 0<=i;i--) {

      divArea += aGroupi].clientHeight * aGroupi].clientWidth;

    }

    if (100 * contentWidth < divArea) fr_createDiv(aGroup,0,stop,fr_columns,first);

  }

}





function fr_createDiv(aGroup, start, stop, columns, noHR) { // start, stop: inclusive, (counting in the Group !), e.g. 0..3

  if (stop<start) return;

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

  newDiv.style.MozColumnCount=columns;

  newDiv.style.MozColumnGap='2em';

  newDiv.style.textAlign='justify';

  var tooBig=false;

  for (var i = stop; start <= i; i--) { // first append the thumb

      if (imgRegExp.test(aGroupi].className)) {

        newNode=aGroupi].cloneNode(true);

        newDiv.appendChild(newNode);

        if (imgRegExp.test(aGroupi].className) && aGroupi].parentNode.clientWidth / columns < newNode.clientWidth) {

          tooBig=true;

        }

      }

  }

  for (var i = stop; start <= i; i--) {

      if (!imgRegExp.test(aGroupi].className)) {

        newNode=aGroupi].cloneNode(true);

        newDiv.appendChild(newNode)

      }

  }

  if (window.innerHeight < newDiv.clientHeight || tooBig /* window.innerHeight-10 < imgHeight */) { // safety valve: too big 

     return;

  }

  aGroupstart].parentNode.insertBefore(newDiv,aGroupstart]);

  if (!noHR) {

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

      newDiv.parentNode.insertBefore(HR,newDiv);

  }

  for (var i = stop; start <= i; i--) { 

      trashNodes.push(aGroupi]); //newDiv.parentNode.removeChild(aGroup[i])

  }

}



// Button to increment the number of columns



function fr_addButton () {

    var node = document.getElementById('p-personal');

    if ( !node ) return null;

    node = node.getElementsByTagName( "ul" )[0];

    if ( !node ) return null;



    var link = document.createElement( "img" );

  link.src= 'http://upload.wikimedia.org/wikipedia/commons/f/f5/FastReader_logo.PNG';

    link.appendChild( document.createTextNode( "FastReader" ) );

    link.onclick = function() {fr_next()};



    var item = document.createElement( "li" );

    item.appendChild( link );



    link.setAttribute( "title", 'FastReader' );



    node.appendChild( item );  // IE compatibility (?)

}



function fr_next() {

  fr_columns= fr_columns % 2 +1;

  fr_setCookie('fr_columns', fr_columns);

  document.location.reload();

};



// Cookie routines to save the number of columns



function fr_getCookie (cookieName) {



    var cookie = ' ' + document.cookie;

    var search = ' ' + cookieName + '=';

    var cookieValue = '';

    var offset = 0;

    var end = 0;

    offset = cookie.indexOf(search);

    if (offset != -1) {

        offset += search.length;

        end = cookie.indexOf(';', offset)

        if (end == -1) {

            end = cookie.length;

        }

        cookieValue = cookie.substring(offset, end);

        cookieValue = cookieValue.replace(/\\+/g, ' ');

        cookieValue = decodeURIComponent(cookieValue);

    }

    return(cookieValue);

}



function fr_setCookie (name, value) {

    var cookie = name + '=' + encodeURIComponent(value);

    var cookieExpire = new Date();

    expires = cookieExpire.setTime(cookieExpire.getTime() + 30 * 24 * 60 * 60 * 1000);

    expires = cookieExpire.toUTCString();

    cookie += '; expires=' + expires;

    document.cookie = cookie;

    return;

}