// -----------------------------------------------------------------------------------
//
//  modalbox v0.1b
//
//  by Arnaud Sellenet - http://demental.info/blog/
//  
//  barely inspired by lightbox.js v2.0.2
//  by Lokesh Dhakar - http://www.huddletogether.com
//  1/9/07
//
//
//  Licensed under the Creative Commons Attribution 2.5 License - http://creativecommons.org/licenses/by/2.5/
//  
// To avoid conflicting with additional functions which are the same as Lightbox.js, 
// you need to include lightbox.js too
//
// Changelog :
// 0.1 First release
// 0.1b (2007-02-08)
//    FIXED : consistency = the resizespeed CSS class is now lowercase just like blocksize
//    FIXED : If two modallinks reside on the same document with one using the default values for blocksize or resizespeed
//            and the other having custom blocksize and resizespeed, the first one would not use the default values anymore
//            after the second one being clicked. This is fixed now.
//    FIXED : renamed the ID of the loading image container to modalLoading, modal close button to bottomModalClose
//            and overlay to modalOverlay in order to avoid conflict with lightbox
//            So now you can have modalboxes and lightboxes in the same document
//    FIXED : loading image now shows up right after the box did, not after the Ajax query being sent.
//    FIXED : switch to 'get' method for sending ajax request
// 0.1c (2007-02-21)
//    FIXED : removed unused, uninitialized variables that caused JS errors in IE6 in some cases
// 0.1d (2007-04-16) :
//            now allows to call initModalbox several times (in case a modal link is created dynamically, after page load).
//            Don't forget to call initModalbox() again when you create a new modal link.
// -----------------------------------------------------------------------------------
/*

  Table of Contents
  -----------------
  Configuration
  Global Variables

  Extending Built-in Objects  
  - Object.extend(Element)
  - Array.prototype.removeDuplicates()
  - Array.prototype.empty()

  Modalbox Class Declaration
  - initialize()
  - start()
  - changeImage()
  - resizeImageContainer()
  - showImage()
  - updateDetails()
  - updateNav()
  - enableKeyboardNav()
  - disableKeyboardNav()
  - keyboardAction()
  - preloadNeighborImages()
  - end()
  
  Miscellaneous Functions
  - getPageScroll()
  - getPageSize()
  - getKey()
  - listenKey()
  - showSelectBoxes()
  - hideSelectBoxes()
  - pause()
  - initLightbox()
  
  Function Calls
  - addLoadEvent(initLightbox)
  
*/
// -----------------------------------------------------------------------------------

//
//  Configuration
//
var fileLoadingImage = "/sfLightboxPlugin/images/loading.gif";
var fileBottomModalCloseImage = "/sfLightboxPlugin/images/close.gif";

var resizeSpeed = 9;  // controls the speed of the image resizing (1=slowest and 10=fastest)

var borderSize = 10;  //if you adjust the padding in the CSS, you will need to update this variable

// -----------------------------------------------------------------------------------

//
//  Global Variables
//
var imageArray = new Array;
var activeImage;

if(resizeSpeed > 10){ resizeSpeed = 10;}
if(resizeSpeed < 1){ resizeSpeed = 1;}
resizeDuration = (11 - resizeSpeed) * 0.15;

// -----------------------------------------------------------------------------------

//
//  Additional methods for Element added by SU, Couloir
//  - further additions by Lokesh Dhakar (huddletogether.com)
//
Object.extend(Element, {
  getWidth: function(element) {
       element = $(element);
       return element.offsetWidth; 
  },
  setWidth: function(element,w) {
       element = $(element);
      element.style.width = w +"px";
  },
  setHeight: function(element,h) {
       element = $(element);
      element.style.height = h +"px";
  },
  setTop: function(element,t) {
       element = $(element);
      element.style.top = t +"px";
  },
  setSrc: function(element,src) {
      element = $(element);
      element.src = src; 
  },
  setHref: function(element,href) {
      element = $(element);
      element.href = href; 
  },
  setInnerHTML: function(element,content) {
    element = $(element);
    element.innerHTML = content;
  }
});

// -----------------------------------------------------------------------------------

//
//  Extending built-in Array object
//  - array.removeDuplicates()
//  - array.empty()
//
Array.prototype.removeDuplicates = function () {
  for(i = 1; i < this.length; i++){
    if(this[i][0] == this[i-1][0]){
      this.splice(i,1);
    }
  }
}

// -----------------------------------------------------------------------------------

Array.prototype.empty = function () {
  for(i = 0; i <= this.length; i++){
    this.shift();
  }
}

// -----------------------------------------------------------------------------------

//
//  Lightbox Class Declaration
//  - initialize()
//  - start()
//  - changeImage()
//  - resizeImageContainer()
//  - showImage()
//  - updateDetails()
//  - updateNav()
//  - enableKeyboardNav()
//  - disableKeyboardNav()
//  - keyboardNavAction()
//  - preloadNeighborImages()
//  - end()
//
//  Structuring of code inspired by Scott Upton (http://www.uptonic.com/)
//

var sizeX;
var sizeY;
var modalBlockUrl='';
var Modalbox = Class.create();

Modalbox.prototype = {
  
  // initialize()
  // Constructor runs on completion of the DOM loading. Loops through anchor tags looking for 
  // 'lightbox' references and applies onclick events to appropriate links. The 2nd section of
  // the function inserts html at the bottom of the page which is used to display the shadow 
  // overlay and the image container.
  //
  initialize: function() {  
    if (!document.getElementsByTagName){ return; }
    var anchors = document.getElementsByTagName('a');

    // loop through all anchor tags
    for (var i=0; i<anchors.length; i++){
      var anchor = anchors[i];
      
      var relAttribute = String(anchor.getAttribute('rel'));
      
      // use the string.match() method to catch 'lightbox' references in the rel attribute
      if (anchor.getAttribute('href') && (relAttribute.toLowerCase().match('modalbox'))){
        anchor.onclick = function () {myModalbox.start(this); return false;}
      }
    }
    var test=$('modalOverlay');
    if(test!=null) {
      return;
    }
    // The rest of this code inserts html at the bottom of the page that looks similar to this:
    //
    //  <div id="modalOverlay"></div>
    //  <div id="lightbox">
    //    <div id="outerImageContainer">
    //      <div id="imageContainer">
    //        <img id="lightboxImage">
    //        <div style="" id="hoverNav">
    //          <a href="#" id="prevLink"></a>
    //          <a href="#" id="nextLink"></a>
    //        </div>
    //        <div id="modalLoading">
    //          <a href="#" id="modalLoadingLink">
    //            <img src="images/loading.gif">
    //          </a>
    //        </div>
    //      </div>
    //    </div>
    //    <div id="imageDataContainer">
    //      <div id="imageData">
    //        <div id="imageDetails">
    //          <span id="caption"></span>
    //          <span id="numberDisplay"></span>
    //        </div>
    //        <div id="bottomModal">
    //          <a href="#" id="bottomModalClose">
    //            <img src="images/close.gif">
    //          </a>
    //        </div>
    //      </div>
    //    </div>
    //  </div>


    var objBody = document.getElementsByTagName("body").item(0);
    
    var objOverlay = document.createElement("div");
    objOverlay.setAttribute('id','modalOverlay');
    objOverlay.style.display = 'none';
    objOverlay.onclick = function() { myModalbox.end(); return false; }

    objBody.appendChild(objOverlay);
    
    var objModalbox = document.createElement("div");
    objModalbox.setAttribute('id','modalbox');
    objModalbox.style.display = 'none';
    objBody.appendChild(objModalbox);
  
    var objOuterBlockContainer = document.createElement("div");
    objOuterBlockContainer.setAttribute('id','outerBlockContainer');
    objModalbox.appendChild(objOuterBlockContainer);

    var objBlockContainer = document.createElement("div");
    objBlockContainer.setAttribute('id','blockContainer');
    objOuterBlockContainer.appendChild(objBlockContainer);
      
    var objLoading = document.createElement("div");
    objLoading.setAttribute('id','modalLoading');
    objOuterBlockContainer.appendChild(objLoading);
  
    var objLoadingLink = document.createElement("a");
    objLoadingLink.setAttribute('id','modalLoadingLink');
    objLoadingLink.setAttribute('href','#');
    objLoadingLink.onclick = function() { myModalbox.end(); return false; }
    objLoading.appendChild(objLoadingLink);
  
    var objLoadingImage = document.createElement("img");
    objLoadingImage.setAttribute('src', fileLoadingImage);
    objLoadingLink.appendChild(objLoadingImage);

    var objBlockDataContainer = document.createElement("div");
    objBlockDataContainer.setAttribute('id','blockDataContainer');
    objBlockDataContainer.className = 'clearfix';
    objModalbox.appendChild(objBlockDataContainer);

    var objBlockData = document.createElement("div");
    objBlockData.setAttribute('id','blockData');
    objBlockDataContainer.appendChild(objBlockData);
    
    
    
    var objBottomNav = document.createElement("div");
    objBottomNav.setAttribute('id','bottomModal');
    objBlockData.appendChild(objBottomNav);
  
    var objBottomNavCloseLink = document.createElement("a");
    objBottomNavCloseLink.setAttribute('id','bottomModalClose');
    objBottomNavCloseLink.setAttribute('href','#');
    objBottomNavCloseLink.onclick = function() { myModalbox.end(); return false; }
    objBottomNav.appendChild(objBottomNavCloseLink);
  
    var objBottomNavCloseImage = document.createElement("img");
    objBottomNavCloseImage.setAttribute('src', fileBottomModalCloseImage);
    objBottomNavCloseLink.appendChild(objBottomNavCloseImage);
  },
  
  //
  //  start()
  //  Display overlay and lightbox. If image is part of a set, add siblings to imageArray.
  //
  start: function(urlLink) {  
    sizeX = 400;
    sizeY = 300;
    modalBlockUrl='';
    extractId='';
    resizeSpeed = 9;
    if(resizeSpeed > 10){ resizeSpeed = 10;}
    if(resizeSpeed < 1){ resizeSpeed = 1;}


    hideSelectBoxes();
    // See if we can find a specified width and height
    classes = urlLink.className.split(' ');
    for (j=0;j<classes.length;j++) {
      if (classes[j].indexOf("blocksize_") == 0) {
        expr = /blocksize_(\d+)x(\d+)/;
        result = expr.exec(classes[j]);
        sizeX = parseInt(result[1]);
        sizeY = parseInt(result[2]);
      } else {
        if (classes[j].indexOf("resizespeed_") == 0) {
          expr = /resizespeed_(\d+)/;
          result = expr.exec(classes[j]);
          resizeSpeed = parseInt(result[1]);
        }
      }
    }
    resizeDuration = (11 - resizeSpeed) * 0.15;

    // stretch overlay to fill page and fade in
    var arrayPageSize = getPageSize();
    Element.setHeight('modalOverlay', arrayPageSize[1]);
    new Effect.Appear('modalOverlay', { duration: 0.2, from: 0.0, to: 0.8, queue:'front' });  

    if (!document.getElementsByTagName){ return; }
    var anchors = document.getElementsByTagName('a');
    

    modalBlockUrl = urlLink.getAttribute('href');

    // calculate top offset for the lightbox and display 
    var arrayPageSize = getPageSize();
    var arrayPageScroll = getPageScroll();
    var modalboxTop = arrayPageScroll[1] + (arrayPageSize[3] / 15);

    Element.setTop('modalbox', modalboxTop);
    Element.show('modalbox');
    Element.show('modalLoading');

    this.displayBlock();
  },

  //
  //  changeImage()
  //  Hide most elements and preload image in preparation for resizing image container.
  //
  displayBlock: function() {
    
    myModalbox.resizeBlockContainer(sizeX, sizeY)
  },


    // hide elements during transition
    

  //
  //  resizeBlockContainer()
  //
  resizeBlockContainer: function( width, height) {
    Element.hide('blockDataContainer');
    // get current height and width
    this.wCur = Element.getWidth('outerBlockContainer');
    this.hCur = Element.getHeight('outerBlockContainer');

    // scalars based on change from old to new
    this.xScale = ((width  + (borderSize * 2)) / this.wCur) * 100;
    this.yScale = ((height  + (borderSize * 2)) / this.hCur) * 100;

    // calculate size difference between new and old image, and resize if necessary
    wDiff = (this.wCur - borderSize * 2) - width;
    hDiff = (this.hCur - borderSize * 2) - height;
    if(!( hDiff == 0)){ new Effect.Scale('outerBlockContainer', this.yScale, {scaleX: false, duration: resizeDuration,  scaleContent: false}); }
    if(!( wDiff == 0)){ new Effect.Scale('outerBlockContainer', this.xScale, {scaleY: false, delay: resizeDuration, duration: resizeDuration, scaleContent: false,afterFinish: function(){myModalbox.SendRequest();}}); }
    if((hDiff == 0) && (wDiff == 0)){
      if (navigator.appVersion.indexOf("MSIE")!=-1){ pause(250); } else { pause(100);} 
    }

    Element.setWidth( 'blockDataContainer', width + (borderSize * 2));

  },
  //
  // SendRequest()
  //
  SendRequest : function() {
    new Ajax.Updater('blockContainer', modalBlockUrl, { method:'get',asynchronous:true, evalScripts:true,
                            onComplete:function(){
                              myModalbox.showBlock();
                            }
                        }      
                    );
  },
  
  //
  //  showImage()
  //  Display image and begin preloading neighbors.
  //
  showBlock: function(){
    new Effect.Appear('blockDataContainer', { from:0,to: 1,duration: 0.2, queue: 'end'});
    Element.hide('modalLoading');

  },


  //
  //  end()
  //
  end: function() {
    Element.hide('modalbox');
    Element.hide('modalLoading');
    new Effect.Fade('modalOverlay', { duration: 0.2});
    showSelectBoxes();
  }
}
//
// getPageScroll()
// Returns array with x,y page scroll values.
// Core code from - quirksmode.org
//
function getPageScroll(){

  var yScroll;

  if (self.pageYOffset) {
    yScroll = self.pageYOffset;
  } else if (document.documentElement && document.documentElement.scrollTop){   // Explorer 6 Strict
    yScroll = document.documentElement.scrollTop;
  } else if (document.body) {// all other Explorers
    yScroll = document.body.scrollTop;
  }
  Element.setWidth('outerBlockContainer','400');
  $('blockContainer').innerHTML='';
  arrayPageScroll = new Array('',yScroll) 
  return arrayPageScroll;
}

// -----------------------------------------------------------------------------------

//
// getPageSize()
// Returns array with page width, height and window width, height
// Core code from - quirksmode.org
// Edit for Firefox by pHaez
//
function getPageSize(){
  
  var xScroll, yScroll;
  
  if (window.innerHeight && window.scrollMaxY) {  
    xScroll = document.body.scrollWidth;
    yScroll = window.innerHeight + window.scrollMaxY;
  } else if (document.body.scrollHeight > document.body.offsetHeight){ // all but Explorer Mac
    xScroll = document.body.scrollWidth;
    yScroll = document.body.scrollHeight;
  } else { // Explorer Mac...would also work in Explorer 6 Strict, Mozilla and Safari
    xScroll = document.body.offsetWidth;
    yScroll = document.body.offsetHeight;
  }
  
  var windowWidth, windowHeight;
  if (self.innerHeight) {  // all except Explorer
    windowWidth = self.innerWidth;
    windowHeight = self.innerHeight;
  } else if (document.documentElement && document.documentElement.clientHeight) { // Explorer 6 Strict Mode
    windowWidth = document.documentElement.clientWidth;
    windowHeight = document.documentElement.clientHeight;
  } else if (document.body) { // other Explorers
    windowWidth = document.body.clientWidth;
    windowHeight = document.body.clientHeight;
  }  
  
  // for small pages with total height less then height of the viewport
  if(yScroll < windowHeight){
    pageHeight = windowHeight;
  } else { 
    pageHeight = yScroll;
  }

  // for small pages with total width less then width of the viewport
  if(xScroll < windowWidth){  
    pageWidth = windowWidth;
  } else {
    pageWidth = xScroll;
  }


  arrayPageSize = new Array(pageWidth,pageHeight,windowWidth,windowHeight) 
  return arrayPageSize;
}

// -----------------------------------------------------------------------------------

//
// getKey(key)
// Gets keycode. If 'x' is pressed then it hides the lightbox.
//
function getKey(e){
  if (e == null) { // ie
    keycode = event.keyCode;
  } else { // mozilla
    keycode = e.which;
  }
  key = String.fromCharCode(keycode).toLowerCase();
  
  if(key == 'x'){
  }
}

// -----------------------------------------------------------------------------------

//
// listenKey()
//
function listenKey () {  document.onkeypress = getKey; }
  
// ---------------------------------------------------

function showSelectBoxes(){
  selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) {
    selects[i].style.visibility = "visible";
  }
}

// ---------------------------------------------------

function hideSelectBoxes(){
  selects = document.getElementsByTagName("select");
  for (i = 0; i != selects.length; i++) {
    selects[i].style.visibility = "hidden";
  }
}

// ---------------------------------------------------

//
// pause(numberMillis)
// Pauses code execution for specified time. Uses busy code, not good.
// Code from http://www.faqts.com/knowledge_base/view.phtml/aid/1602
//
function pause(numberMillis) {
  var now = new Date();
  var exitTime = now.getTime() + numberMillis;
  while (true) {
    now = new Date();
    if (now.getTime() > exitTime)
      return;
  }
}
function initModalbox() { myModalbox = new Modalbox(); }
Event.observe(window, 'load', initModalbox, false);