/*
 * The jBox menu system. Written by Dan Fuhry and licensed under the GPL.
 */

// Cache of DOM and event objects, used in setTimeout() calls due to scope rules
var jBoxObjCache = new Object();

// Cache of "correct" heights for unordered list objects used in submenus. Helps the animation routine know what height it's aiming for.
var jBoxMenuHeights = new Object();

// Blocks animations from running if there's already an animation going on the same object
var jBoxSlideBlocker = new Object();

// Switch to enable or disable jBox slide animation
var jBox_slide_enable = true;

// Speed at which the menus should slide open. 1 to 100 or -1 to disable.
// Setting this higher than 100 will cause an infinite loop in the browser.
// Default is 80 - anything higher than 90 means exponential speed increase
var slide_speed = 80;

// Inertia value to start with
// Default is 0
var inertia_base = 0;

// Value added to inertia_base on each frame - generally 1 to 3 is good, with 1 being slowest animation
// Default is 1
var inertia_inc  = 1;

// Opacity that menus should fade to. 1 to 100 or -1 to disable fades. This only works if the slide effect is also enabled.
// Default is 100
var jBox_opacity = 100;

// Adds the jBox CSS to the HTML header. Called on window onload.
function jBoxInit()
{
  setTimeout('jBoxBatchSetup();', 200);
}

// Initializes each menu.
function jBoxBatchSetup()
{
  var menus = document.getElementsByClassName('div', 'menu_nojs');
  if ( menus.length > 0 )
  {
    for ( var i in menus )
    {
      if ( typeof(menus[i]) != 'object')
        continue; // toJSONString() compatibility
      jBoxSetup(menus[i]);
    }
  }
}

// Initializes a div with a jBox menu in it.
function jBoxSetup(obj)
{
  $(obj).addClass('menu');
  removeTextNodes(obj);
  for ( var i in obj.childNodes )
  {
    /* normally this would be done in about 2 lines of code, but javascript is so picky..... */
    if ( obj.childNodes[i] )
    {
      if ( obj.childNodes[i].tagName )
      {
        if ( obj.childNodes[i].tagName.toLowerCase() == 'a' )
        {
          if ( obj.childNodes[i].nextSibling.tagName )
          {
            if ( obj.childNodes[i].nextSibling.tagName.toLowerCase() == 'ul' || ( obj.childNodes[i].nextSibling.tagName.toLowerCase() == 'div' && obj.childNodes[i].nextSibling.className == 'submenu' ) )
            {
              // Calculate height
              var ul = obj.childNodes[i].nextSibling;
              domObjChangeOpac(0, ul);
              ul.style.display = 'block';
              var dim = fetch_dimensions(ul);
              if ( !ul.id )
                ul.id = 'jBoxmenuobj_' + Math.floor(Math.random() * 10000000);
              jBoxMenuHeights[ul.id] = parseInt(dim['h']) - 2; // subtract 2px for border width
              ul.style.display = 'none';
              domObjChangeOpac(100, ul);
              
              // Setup events
              obj.childNodes[i].onmouseover = function()  { jBoxOverHandler(this); };
              obj.childNodes[i].onmouseout = function(e)  { jBoxOutHandler(this, e); };
              obj.childNodes[i].nextSibling.onmouseout = function(e)  { jBoxOutHandler(this, e); };
            }
          }
        }
      }
    }
  }
}

// Called when user hovers mouse over a submenu
function jBoxOverHandler(obj)
{
  if ( is_Safari )
    alert('Safari and over');
  // Random ID used to track the object to perform on
  var seed = Math.floor(Math.random() * 1000000);
  jBoxObjCache[seed] = obj;
  
  // Sleep for a (little more than a tenth of a) second to see if the user really wants the menu to expand
  setTimeout('if(isOverObj(jBoxObjCache['+seed+'], false, false)) jBoxOverHandlerBin(jBoxObjCache['+seed+']);', 150);
}

// Displays a menu.
function jBoxOverHandlerBin(obj)
{
  var others = obj.parentNode.getElementsByTagName('ul');
  for ( var i in others )
  {
    if(typeof(others[i]) == 'object')
    {
      others[i].style.display = 'none';
      others[i].previousSibling.className = '';
    }
  }
  var others = obj.parentNode.getElementsByTagName('div');
  for ( var i in others )
  {
    if(typeof(others[i]) == 'object')
    {
      if ( others[i].className == 'submenu' )
      {
        others[i].style.display = 'none';
        others[i].previousSibling.className = '';
      }
    }
  }
  if(obj.nextSibling.tagName.toLowerCase() == 'ul' || ( obj.nextSibling.tagName.toLowerCase() == 'div' && obj.nextSibling.className == 'submenu' ))
  {
    obj.className = 'liteselected';
    var ul = obj.nextSibling;
    var dim = fetch_dimensions(obj);
    var off = fetch_offset(obj);
    var dimh = parseInt(dim['h']);
    var offtop = parseInt(off['top']);
    var top = dimh + offtop;
    left = off['left'];
    if ( jBox_slide_enable )
    {
      domObjChangeOpac(0, ul);
    }
    ul.style.left = left + 'px';
    ul.style.top = top + 'px';
    ul.style.clip = 'rect(auto,auto,auto,auto)';
    ul.style.overflow = 'visible';
    ul.style.display = 'block';
    if ( jBox_slide_enable )
    {
      slideOut(ul);
    }
    else
    {
      domObjChangeOpac(100, ul);
    }
  }
}

function jBoxOutHandler(obj, event)
{
  var seed = Math.floor(Math.random() * 1000000);
  var seed2 = Math.floor(Math.random() * 1000000);
  jBoxObjCache[seed] = obj;
  jBoxObjCache[seed2] = event;
  setTimeout('jBoxOutHandlerBin(jBoxObjCache['+seed+'], jBoxObjCache['+seed2+']);', 750);
}

function jBoxOutHandlerBin(obj, event)
{
  var caller = obj.tagName.toLowerCase();
  if(caller == 'a')
  {
    a = obj;
    ul = obj.nextSibling;
  }
  else if(caller == 'ul' || caller == 'div')
  {
    a = obj.previousSibling;
    ul = obj;
  }
  else
  {
    return false;
  }
  
  if (!isOverObj(a, false, event) && !isOverObj(ul, true, event))
  {
    a.className = '';
    
    if ( jBox_slide_enable )
    {
      slideIn(ul);
    }
    else
    {
      ul.style.display = 'none';
    }
    
  }
  
  return true;
}

// Slide an element downwards until it is at full height.
// First parameter should be a DOM object with style.display = block and opacity = 0.

var sliderobj = new Object();

function slideOut(obj)
{
  if ( jBoxSlideBlocker[obj.id] )
    return false;
  
  jBoxSlideBlocker[obj.id] = true;
  
  if ( slide_speed == -1 )
  {
    obj.style.display = 'block';
    return false;
  }
  
  var currentheight = 0;
  var targetheight = jBoxMenuHeights[obj.id];
  var inertiabase = inertia_base;
  var inertiainc = inertia_inc;
  slideStep(obj, 0);
  domObjChangeOpac(100, obj);
  obj.style.overflow = 'hidden';
  
  // Don't edit past here
  var timercnt = 0;
  
  var seed = Math.floor(Math.random() * 1000000);
  sliderobj[seed] = obj;
  
  var framecnt = 0;
  
  while(true)
  {
    framecnt++;
    timercnt += ( 100 - slide_speed );
    inertiabase += inertiainc;
    currentheight += inertiabase;
    if ( currentheight > targetheight )
      currentheight = targetheight;
    setTimeout('slideStep(sliderobj['+seed+'], '+currentheight+', '+targetheight+');', timercnt);
    if ( currentheight >= targetheight )
      break;
  }
  timercnt = timercnt + ( 100 - slide_speed );
  setTimeout('jBoxSlideBlocker[sliderobj['+seed+'].id] = false;', timercnt);
  var opacstep = jBox_opacity / framecnt;
  var opac = 0;
  var timerstep = 0;
  domObjChangeOpac(0, obj);
  while(true)
  {
    timerstep += ( 100 - slide_speed );
    opac += opacstep;
    setTimeout('domObjChangeOpac('+opac+', sliderobj['+seed+']);', timerstep);
    if ( opac >= jBox_opacity )
      break;
  }
}

function slideIn(obj)
{
  if ( obj.style.display != 'block' )
    return false;
  
  if ( jBoxSlideBlocker[obj.id] )
    return false;
  
  jBoxSlideBlocker[obj.id] = true;
  
  var targetheight = 0;
  var dim = fetch_dimensions(obj);
  var currentheight = jBoxMenuHeights[obj.id];
  var origheight = currentheight;
  var inertiabase = inertia_base;
  var inertiainc = inertia_inc;
  domObjChangeOpac(100, obj);
  obj.style.overflow = 'hidden';
  
  // Don't edit past here
  var timercnt = 0;
  
  var seed = Math.floor(Math.random() * 1000000);
  sliderobj[seed] = obj;
  
  var framecnt = 0;
  
  for(var j = 0;j<100;j++) // while(true)
  {
    framecnt++;
    timercnt = timercnt + ( 100 - slide_speed );
    inertiabase = inertiabase + inertiainc;
    currentheight = currentheight - inertiabase;
    if ( currentheight < targetheight )
      currentheight = targetheight;
    setTimeout('slideStep(sliderobj['+seed+'], '+currentheight+');', timercnt);
    if ( currentheight <= targetheight )
      break;
  }
  timercnt += ( 100 - slide_speed );
  setTimeout('sliderobj['+seed+'].style.display="none";sliderobj['+seed+'].style.height="'+origheight+'px";jBoxSlideBlocker[sliderobj['+seed+'].id] = false;', timercnt);
  
  var opacstep = jBox_opacity / framecnt;
  var opac = jBox_opacity;
  var timerstep = 0;
  domObjChangeOpac(100, obj);
  while(true)
  {
    timerstep += ( 100 - slide_speed );
    opac -= opacstep;
    setTimeout('domObjChangeOpac('+opac+', sliderobj['+seed+']);', timerstep);
    if ( opac <= 0 )
      break;
  }
  
}

function slideStep(obj, height, maxheight)
{
  obj.style.height = height + 'px';
  //obj.style.clip = 'rect(3px,auto,'+maxheight+'px,auto)';
  obj.style.overflow = 'hidden';
  //obj.style.clip = 'rect('+height+'px,0px,'+maxheight+'px,auto);';
}

function isOverObj(obj, bias, event)
{
  var fieldUL = new Object();
  var dim = fetch_dimensions(obj);
  var off = fetch_offset(obj);
  fieldUL['top'] = off['top'];
  fieldUL['left'] = off['left'];
  fieldUL['right'] = off['left'] + dim['w'];
  fieldUL['bottom'] = off['top'] + dim['h'];
  
  //document.getElementById('debug').innerHTML = '<br /><br /><br /><br /><br />Mouse: x: '+mouseX+', y:' + mouseY + '<br />'; // + document.getElementById('debug').innerHTML;
  
  if(bias)
  {
    if ( ( mouseX < fieldUL['left'] + 2 || mouseX > fieldUL['right']  - 5 ) ||
         ( mouseY < fieldUL['top']  - 2 || mouseY > fieldUL['bottom'] - 2 ) )
    {
       return false;
    }
  }
  else
  {
    if ( ( mouseX < fieldUL['left'] || mouseX > fieldUL['right']  ) ||
         ( mouseY < fieldUL['top']  || mouseY > fieldUL['bottom'] ) )
       return false;
  }
     
  return true;
  
  /*
  var tgt = event.target;
  if ( !tgt )
    return false;
  do {
    if ( tgt == obj )
      return true;
    tgt = tgt.parentNode;
  } while (tgt.tagName.toLowerCase() != 'body' );
  return false;
  */
}

function jBoxGarbageCollection(e)
{
  setMousePos(e);
  var menus = document.getElementsByClassName('div', 'menu');
  if ( menus.length > 0 )
  {
    for ( var i in menus )
    {
      if ( typeof(menus[i]) != 'object')
        continue; // toJSONString() compatibility
      var uls = menus[i].getElementsByTagName('ul');
      if ( uls.length > 0 )
      {
        for ( var j = 0; j < uls.length; j++ )
        {
          if ( !isOverObj(uls[j], false, e) )
          {
            uls[j].previousSibling.className = '';
            //uls[j].style.display = 'none';
            slideIn(uls[j]);
          }
        }
      }
      var uls = getElementsByClassName(menus[i], 'divs', 'submenu');
      if ( uls.length > 0 )
      {
        for ( var j = 0; j < uls.length; j++ )
        {
          if ( !isOverObj(uls[j], false, e) )
          {
            uls[j].previousSibling.className = '';
            //uls[j].style.display = 'none';
            slideIn(uls[j]);
          }
        }
      }
    }
  }
}

document.onclick = jBoxGarbageCollection;

function removeTextNodes(obj)
{
  if(obj)
  {
    if(typeof(obj.tagName) != 'string')
    {
      if ( obj.nodeType == 3 && obj.data.match(/^([\s]*)$/ig) ) 
      {
        obj.parentNode.removeChild(obj);
        return;
      }
    }
    if(obj.firstChild)
    {
      for(var i in obj.childNodes)
      {
        removeTextNodes(obj.childNodes[i]);
      }
    }
  }
}

var getElementsByClassName = function(parent, type, cls) {
  if(!type)
    type = '*';
  ret = new Array();
  el = parent.getElementsByTagName(type);
  for ( var i in el )
  {
    if ( typeof(el[i]) != 'object')
      continue; // toJSONString() compatibility
    if(el[i].className)
    {
      if(el[i].className.indexOf(' ') > 0)
      {
        classes = el[i].className.split(' ');
      }
      else
      {
        classes = new Array();
        classes.push(el[i].className);
      }
      if ( in_array(cls, classes) )
        ret.push(el[i]);
    }
  }
  return ret;
}

document.getElementsByClassName = function(type, cls) {
  return getElementsByClassName(document, type, cls);
}

function setMousePos(event)
{
  if(IE)
  {
    if(!event)
    {
      event = window.event;
    }
    clX = event.clientX;
    sL  = document.body.scrollLeft;
    mouseX = clX + sL;
    mouseY = event.clientY + document.body.scrollTop;
    return;
  }
  if( typeof(event.clientX) == 'number' )
  {
    mouseX = event.clientX;
    mouseY = event.clientY;
    return;
  }
  else if( typeof(event.layerX) == 'number' )
  {
    mouseX = event.layerX;
    mouseY = event.layerY;
    return;
  }
  else if( typeof(event.offsetX) == 'number' )
  {
    mouseX = event.offsetX;
    mouseY = event.offsetY;
    return;
  }
  else if( typeof(event.screenX) == 'number' )
  {
    mouseX = event.screenX;
    mouseY = event.screenY;
    return;
  }
  else if( typeof(event.x) == 'number' )
  {
    mouseX = event.x;
    mouseY = event.y;
    return;
  }
}

document.onmousemove = function(e)
{
  setMousePos(e);
};

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 + ")";
}