// JavaScript Document
// Miscellaneous core Javascript functions for Moodle

function popupchecker(msg) {
    var testwindow = window.open('itestwin.html', '', 'width=1,height=1,left=0,top=0,scrollbars=no');
    if (testwindow == null)
        {alert(msg);}
    else {
        testwindow.close();
    }
}

/*
function popUpProperties(inobj) {
/// Legacy function
  var op = window.open();
  op.document.open('text/plain');
  for (objprop in inobj) {
    op.document.write(objprop + ' => ' + inobj[objprop] + '\n');
  }
  op.document.close();
}

function fillmessagebox(text) {
/// Legacy function
  document.form.message.value = text;
}

function copyrichtext(textname) {
/// Legacy stub for old editor - to be removed soon
  return true;
}
*/

function checkall() {
  var el = document.getElementsByTagName('input');
  for(var i=0; i<el.length; i++) {
    if(el[i].type == 'checkbox') {
      el[i].checked = true;
    }
  }
}

function checknone() {
  var el = document.getElementsByTagName('input');
  for(var i=0; i<el.length; i++) {
    if(el[i].type == 'checkbox') {
      el[i].checked = false;
    }
  }
}

function checkAllWithValue( evalue ) {
  var el = document.getElementsByTagName('input');
  for(var i=0; i<el.length; i++) {
    if(el[i].type == 'radio' && el[i].value == evalue) {
      el[i].checked = true;
    }
  }
}

function lockoptions(formid, master, subitems) {
  // Subitems is an array of names of sub items.
  // Optionally, each item in subitems may have a
  // companion hidden item in the form with the
  // same name but prefixed by "h".
  var form = document.forms[formid];

  if (eval("form."+master+".checked")) {
    for (i=0; i<subitems.length; i++) {
      unlockoption(form, subitems[i]);
    }
  } else {
    for (i=0; i<subitems.length; i++) {
      lockoption(form, subitems[i]);
    }
  }
  return(true);
}

function lockoption(form,item) {
  eval("form."+item+".disabled=true");/* IE thing */
  if(form.elements['h'+item]) {
    eval("form.h"+item+".value=1");
  }
}

function unlockoption(form,item) {
  eval("form."+item+".disabled=false");/* IE thing */
  if(form.elements['h'+item]) {
    eval("form.h"+item+".value=0");
  }
}


function lockoptionsall(formid) {
    var form = document.forms[formid];
    var dependons = eval(formid+'items');
    var tolock = Array();
    for (var dependon in dependons) {
        // change for MooTools compatibility
        if (!dependons.propertyIsEnumerable(dependon)) {
            continue;
        }
        var master = form[dependon];
        if (master === undefined) {
            continue;
        }
        for (var condition in dependons[dependon]) {
            for (var value in dependons[dependon][condition]) {
                var lock;
                switch (condition) {
                  case 'notchecked':
                      lock = !master.checked; break;
                  case 'checked':
                      lock = master.checked; break;
                  case 'noitemselected':
                      lock = master.selectedIndex==-1; break;
                  case 'eq':
                      lock = master.value==value; break;
                  default:
                      lock = master.value!=value; break;
                }
                for (var ei in dependons[dependon][condition][value]) {
                    // change for MooTools compatibility
                    if (!window.webkit && (!dependons[dependon][condition][value].propertyIsEnumerable(ei))) {
                        continue;
                    }
                    var eltolock = dependons[dependon][condition][value][ei];
                    if (tolock[eltolock] != null){
                        tolock[eltolock] =
                                lock || tolock[eltolock];
                    } else {
                        tolock[eltolock] = lock;
                    }
                }
            }
        }
    }
    for (var el in tolock){
        // change for MooTools compatibility
        if (!tolock.propertyIsEnumerable(el)) {
            continue;
        }
        var formelement = form[el];
        if ((formelement === undefined) || (formelement.disabled === undefined)) {
            continue;
        }
        formelement.disabled = tolock[el];
    }
    return true;
}

function lockoptionsallsetup(formid) {
    var form = document.forms[formid];
    var dependons = eval(formid+'items');
    for (var dependon in dependons) {
        // change for MooTools compatibility
        if (!dependons.propertyIsEnumerable(dependon)) {
            continue;
        }
        var master = form[dependon];
        if (master === undefined) {
            continue;
        }
        master.formid = formid;
        master.onclick  = function() {return lockoptionsall(this.formid);};
        master.onblur   = function() {return lockoptionsall(this.formid);};
        master.onchange = function() {return lockoptionsall(this.formid);};
    }
    for (var i = 0; i < form.elements.length; i++){
        var formelement = form.elements[i];
        if (formelement.type=='reset') {
            formelement.formid = formid;
            formelement.onclick  = function() {this.form.reset();return lockoptionsall(this.formid);};
            formelement.onblur   = function() {this.form.reset();return lockoptionsall(this.formid);};
            formelement.onchange = function() {this.form.reset();return lockoptionsall(this.formid);};
        }
    }
    return lockoptionsall(formid);
}


function submitFormById(id) {
    var theform = document.getElementById(id);
    if(!theform) {
        return false;
    }
    if(theform.tagName.toLowerCase() != 'form') {
        return false;
    }
    if(!theform.onsubmit || theform.onsubmit()) {
        return theform.submit();
    }
}

function select_all_in(elTagName, elClass, elId) {
    var inputs = document.getElementsByTagName('input');
    inputs = filterByParent(inputs, function(el) {return findParentNode(el, elTagName, elClass, elId);});
    for(var i = 0; i < inputs.length; ++i) {
        if(inputs[i].type == 'checkbox' || inputs[i].type == 'radio') {
            inputs[i].checked = 'checked';
        }
    }
}

function deselect_all_in(elTagName, elClass, elId) {
    var inputs = document.getElementsByTagName('INPUT');
    inputs = filterByParent(inputs, function(el) {return findParentNode(el, elTagName, elClass, elId);});
    for(var i = 0; i < inputs.length; ++i) {
        if(inputs[i].type == 'checkbox' || inputs[i].type == 'radio') {
            inputs[i].checked = '';
        }
    }
}

function confirm_if(expr, message) {
    if(!expr) {
        return true;
    }
    return confirm(message);
}


/*
    findParentNode (start, elementName, elementClass, elementID)

    Travels up the DOM hierarchy to find a parent element with the
    specified tag name, class, and id. All conditions must be met,
    but any can be ommitted. Returns the BODY element if no match
    found.
*/
function findParentNode(el, elName, elClass, elId) {
    while(el.nodeName.toUpperCase() != 'BODY') {
        if(
            (!elName || el.nodeName.toUpperCase() == elName) &&
            (!elClass || el.className.indexOf(elClass) != -1) &&
            (!elId || el.id == elId))
        {
            break;
        }
        el = el.parentNode;
    }
    return el;
}
/*
    findChildNode (start, elementName, elementClass, elementID)

    Travels down the DOM hierarchy to find all child elements with the
    specified tag name, class, and id. All conditions must be met,
    but any can be ommitted.
    Doesn't examine children of matches.
*/
function findChildNodes(start, tagName, elementClass, elementID, elementName) {
    var children = new Array();
    for (var i = 0; i < start.childNodes.length; i++) {
        var classfound = false;
        var child = start.childNodes[i];
        if((child.nodeType == 1) &&//element node type
                  (elementClass && (typeof(child.className)=='string'))){
            var childClasses = child.className.split(/\s+/);
            for (var childClassIndex in childClasses){
                if (childClasses[childClassIndex]==elementClass){
                    classfound = true;
                    break;
                }
            }
        }
        if(child.nodeType == 1) { //element node type
            if  ( (!tagName || child.nodeName == tagName) &&
                (!elementClass || classfound)&&
                (!elementID || child.id == elementID) &&
                (!elementName || child.name == elementName))
            {
                children = children.concat(child);
            } else {
                children = children.concat(findChildNodes(child, tagName, elementClass, elementID, elementName));
            }
        }
    }
    return children;
}
/*
    elementSetHide (elements, hide)

    Adds or removes the "hide" class for the specified elements depending on boolean hide.
*/
function elementShowAdvanced(elements, show) {
    for (var elementIndex in elements){
        element = elements[elementIndex];
        element.className = element.className.replace(new RegExp(' ?hide'), '')
        if(!show) {
            element.className += ' hide';
        }
    }
}

function showAdvancedOnClick(button, hidetext, showtext){
    var toSet=findChildNodes(button.form, null, 'advanced');
    var buttontext = '';
    if (button.form.elements['mform_showadvanced_last'].value == '0' ||  button.form.elements['mform_showadvanced_last'].value == '' ) {
        elementShowAdvanced(toSet, true);
        buttontext = hidetext;
        button.form.elements['mform_showadvanced_last'].value = '1';
    } else {
        elementShowAdvanced(toSet, false);
        buttontext = showtext;
        button.form.elements['mform_showadvanced_last'].value = '0';
    }
    var formelements = button.form.elements;
    // Fixed MDL-10506
    for (var i = 0; i < formelements.length; i++){
        if (formelements[i] && formelements[i].name && (formelements[i].name=='mform_showadvanced')){
            formelements[i].value = buttontext;
        }
    }
    //never submit the form if js is enabled.
    return false;
}

function unmaskPassword(id) {
  var pw = document.getElementById(id);
  var chb = document.getElementById(id+'unmask');

  try {
    // first try IE way - it can not set name attribute later
    if (chb.checked) {
      var newpw = document.createElement('<input type="text" name="'+pw.name+'">');
    } else {
      var newpw = document.createElement('<input type="password" name="'+pw.name+'">');
    }
    newpw.attributes['class'].nodeValue = pw.attributes['class'].nodeValue;
  } catch (e) {
    var newpw = document.createElement('input');
    newpw.setAttribute('name', pw.name);
    if (chb.checked) {
      newpw.setAttribute('type', 'text');
    } else {
      newpw.setAttribute('type', 'password');
    }
    newpw.setAttribute('class', pw.getAttribute('class'));
  }
  newpw.id = pw.id;
  newpw.size = pw.size;
  newpw.onblur = pw.onblur;
  newpw.onchange = pw.onchange;
  newpw.value = pw.value;
  pw.parentNode.replaceChild(newpw, pw);
}

/*
    elementToggleHide (element, elementFinder)

    If elementFinder is not provided, toggles the "hidden" class for the specified element.
    If elementFinder is provided, then the "hidden" class will be toggled for the object
    returned by the function call elementFinder(element).

    If persistent == true, also sets a cookie for this.
*/
function elementToggleHide(el, persistent, elementFinder, strShow, strHide) {
    if(!elementFinder) {
        var obj = el;  //el:container
        el = document.getElementById('togglehide_'+obj.id);
    }
    else {
        var obj = elementFinder(el);  //el:button.
    }
    if(obj.className.indexOf('hidden') == -1) {
        obj.className += ' hidden';
        if (el.src) {
            el.src = el.src.replace('switch_minus', 'switch_plus');
            el.alt = strShow;
            el.title = strShow;
        }
        var shown = 0;
    }
    else {
        obj.className = obj.className.replace(new RegExp(' ?hidden'), '');
        if (el.src) {
            el.src = el.src.replace('switch_plus', 'switch_minus');
            el.alt = strHide;
            el.title = strHide;
        }
        var shown = 1;
    }

    if(persistent == true) {
        new cookie('hide:' + obj.id, 1, (shown ? -1 : 356), '/').set();
    }
}



function filterByParent(elCollection, parentFinder) {
    var filteredCollection = [];
    for(var i = 0; i < elCollection.length; ++i) {
        var findParent = parentFinder(elCollection[i]);
        if(findParent.nodeName != 'BODY') {
            filteredCollection.push(elCollection[i]);
        }
    }
    return filteredCollection;
}

/*
    All this is here just so that IE gets to handle oversized blocks
    in a visually pleasing manner. It does a browser detect. So sue me.
*/

function fix_column_widths() {
    var agt = navigator.userAgent.toLowerCase();
    if ((agt.indexOf("msie") != -1) && (agt.indexOf("opera") == -1)) {
        fix_column_width('left-column');
        fix_column_width('right-column');
    }
}

function fix_column_width(colName) {
    if(column = document.getElementById(colName)) {
        if(!column.offsetWidth) {
            setTimeout("fix_column_width('" + colName + "')", 20);
            return;
        }

        var width = 0;
        var nodes = column.childNodes;

        for(i = 0; i < nodes.length; ++i) {
            if(nodes[i].className.indexOf("sideblock") != -1 ) {
                if(width < nodes[i].offsetWidth) {
                    width = nodes[i].offsetWidth;
                }
            }
        }

        for(i = 0; i < nodes.length; ++i) {
            if(nodes[i].className.indexOf("sideblock") != -1 ) {
                nodes[i].style.width = width + 'px';
            }
        }
    }
}


/*
   Insert myValue at current cursor position
 */
function insertAtCursor(myField, myValue) {
    // IE support
    if (document.selection) {
        myField.focus();
        sel = document.selection.createRange();
        sel.text = myValue;
    }
    // Mozilla/Netscape support
    else if (myField.selectionStart || myField.selectionStart == '0') {
        var startPos = myField.selectionStart;
        var endPos = myField.selectionEnd;
        myField.value = myField.value.substring(0, startPos)
            + myValue + myField.value.substring(endPos, myField.value.length);
    } else {
        myField.value += myValue;
    }
}


/*
        Call instead of setting window.onload directly or setting body onload=.
        Adds your function to a chain of functions rather than overwriting anything
        that exists.
*/
function addonload(fn) {
    var oldhandler=window.onload;
    window.onload=function() {
        if(oldhandler) oldhandler();
            fn();
    }
}

function bringToForefront( div1, div2 ) {
    elementFocus = document.getElementById( div1 );
    elementHide = document.getElementById( div2 );

    if (elementHide != null) {
        elementHide.style.display ='none';
    }
    if (elementFocus == null) {
        return false;
    }
    elementFocus.style.display = '';
}
function bringToForefrontTab( div1, div2 ) {
    elementFocus = document.getElementById( div1 );
    elementHide = document.getElementById( div2 );

    baseHideColor = '#c6e5df';
    baseFocusColor = '#e8f4f2';

  if($.cookie("css")) {
  
    if ($.cookie("css")=='/css/base_black.css'){
          baseHideColor = '#343434';
          baseFocusColor = '#888888';
    }

    if ($.cookie("css")=='/css/base_white.css'){
          baseHideColor = '#2F9ACD';
          baseFocusColor = '#00bf9a';
    }
  }


    if (elementHide != null) {
        elementHide.style.backgroundColor = baseHideColor;
    }
    if (elementFocus == null) {
        alert('nullzie');
        return false;
    }
    elementFocus.style.backgroundColor = baseFocusColor;
}

/***********************************************
* Pausing up-down scroller- © Dynamic Drive (www.dynamicdrive.com)
* This notice MUST stay intact for legal use
* Visit http://www.dynamicdrive.com/ for this script and 100s more.
***********************************************/

function pausescroller(content, divId, divClass, delay){
this.content=content //message array content
this.tickerid=divId //ID of ticker div to display information
this.delay=delay //Delay between msg change, in miliseconds.
this.mouseoverBol=0 //Boolean to indicate whether mouse is currently over scroller (and pause it if it is)
this.hiddendivpointer=1 //index of message array for hidden div
document.write('<div id="'+divId+'" class="'+divClass+'" style="position: relative; overflow: hidden"><div class="innerDiv" style="position: absolute; width: 100%" id="'+divId+'1">'+content[0]+'</div><div class="innerDiv" style="position: absolute; width: 100%; visibility: hidden" id="'+divId+'2">'+content[1]+'</div></div>')
var scrollerinstance=this
if (window.addEventListener) //run onload in DOM2 browsers
window.addEventListener("load", function(){scrollerinstance.initialize()}, false)
else if (window.attachEvent) //run onload in IE5.5+
window.attachEvent("onload", function(){scrollerinstance.initialize()})
else if (document.getElementById) //if legacy DOM browsers, just start scroller after 0.5 sec
setTimeout(function(){scrollerinstance.initialize()}, 500)
}

// -------------------------------------------------------------------
// initialize()- Initialize scroller method.
// -Get div objects, set initial positions, start up down animation
// -------------------------------------------------------------------

pausescroller.prototype.initialize=function(){
this.tickerdiv=document.getElementById(this.tickerid)
this.visiblediv=document.getElementById(this.tickerid+"1")
this.hiddendiv=document.getElementById(this.tickerid+"2")
this.visibledivtop=parseInt(pausescroller.getCSSpadding(this.tickerdiv))
//set width of inner DIVs to outer DIV's width minus padding (padding assumed to be top padding x 2)
this.visiblediv.style.width=this.hiddendiv.style.width=this.tickerdiv.offsetWidth-(this.visibledivtop*2)+"px"
this.getinline(this.visiblediv, this.hiddendiv)
this.hiddendiv.style.visibility="visible"
var scrollerinstance=this
document.getElementById(this.tickerid).onmouseover=function(){scrollerinstance.mouseoverBol=1}
document.getElementById(this.tickerid).onmouseout=function(){scrollerinstance.mouseoverBol=0}
if (window.attachEvent) //Clean up loose references in IE
window.attachEvent("onunload", function(){scrollerinstance.tickerdiv.onmouseover=scrollerinstance.tickerdiv.onmouseout=null})
setTimeout(function(){scrollerinstance.animateup()}, this.delay)
}


// -------------------------------------------------------------------
// animateup()- Move the two inner divs of the scroller up and in sync
// -------------------------------------------------------------------

pausescroller.prototype.animateup=function(){
var scrollerinstance=this
if (parseInt(this.hiddendiv.style.top)>(this.visibledivtop+5)){
this.visiblediv.style.top=parseInt(this.visiblediv.style.top)-5+"px"
this.hiddendiv.style.top=parseInt(this.hiddendiv.style.top)-5+"px"
setTimeout(function(){scrollerinstance.animateup()}, 50)
}
else{
this.getinline(this.hiddendiv, this.visiblediv)
this.swapdivs()
setTimeout(function(){scrollerinstance.setmessage()}, this.delay)
}
}

// -------------------------------------------------------------------
// swapdivs()- Swap between which is the visible and which is the hidden div
// -------------------------------------------------------------------

pausescroller.prototype.swapdivs=function(){
var tempcontainer=this.visiblediv
this.visiblediv=this.hiddendiv
this.hiddendiv=tempcontainer
}

pausescroller.prototype.getinline=function(div1, div2){
div1.style.top=this.visibledivtop+"px"
div2.style.top=Math.max(div1.parentNode.offsetHeight, div1.offsetHeight)+"px"
}

// -------------------------------------------------------------------
// setmessage()- Populate the hidden div with the next message before it's visible
// -------------------------------------------------------------------

pausescroller.prototype.setmessage=function(){
var scrollerinstance=this
if (this.mouseoverBol==1) //if mouse is currently over scoller, do nothing (pause it)
setTimeout(function(){scrollerinstance.setmessage()}, 100)
else{
var i=this.hiddendivpointer
var ceiling=this.content.length
this.hiddendivpointer=(i+1>ceiling-1)? 0 : i+1
this.hiddendiv.innerHTML=this.content[this.hiddendivpointer]
this.animateup()
}
}

pausescroller.getCSSpadding=function(tickerobj){ //get CSS padding value, if any
if (tickerobj.currentStyle)
return tickerobj.currentStyle["paddingTop"]
else if (window.getComputedStyle) //if DOM2
return window.getComputedStyle(tickerobj, "").getPropertyValue("padding-top")
else
return 0
}