// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gHideSelects = false;
var gLoading = "/popup/loading.html";

var gTabIndexes = new Array();
// Pre-defined list of tags we want to disable/enable tabbing into
var gTabbableTags = new Array("A","BUTTON","TEXTAREA","INPUT","IFRAME");  

// If using Mozilla or Firefox, use Tab-key trap.
if (!document.all) {
  document.onkeypress = keyDownHandler;
}

/**
 * Override the loading page from loading.html to something else
 */
function setPopUpLoadingPage(loading) {
  gLoading = loading;
}

/**
 * Initializes popup code on load.  
 */
function initPopUp() {
  // Add the HTML to the body
  var body = document.getElementsByTagName('body')[0];
  var popmask = document.createElement('div');
  popmask.id = 'popupMask';
  var popcont = document.createElement('div');
  popcont.id = 'popupContainer';
  popcont.innerHTML = '' +
    '<div id="popupInner">' +
      '<div id="popupTitleBar">' +
        '<div id="popupTitle"></div>' +
        '<div id="popupControls">' +
          '<a onclick="hidePopWin(false);"><span>Close</span></a>' +
        '</div>' +
      '</div>' +
      '<iframe src="'+gLoading+'" style="width:100%;height:100%;background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame" width="100%" height="100%"></iframe>' +
    '</div>';
  body.appendChild(popmask);
  body.appendChild(popcont);
  
  gPopupMask = document.getElementById("popupMask");
  gPopupContainer = document.getElementById("popupContainer");
  gPopFrame = document.getElementById("popupFrame");  
  
  // check to see if this is IE version 6 or lower. hide select boxes if so
  // maybe they'll fix this in version 7?
  var brsVersion = parseInt(window.navigator.appVersion.charAt(0), 10);
  if (brsVersion <= 6 && window.navigator.userAgent.indexOf("MSIE") > -1) {
    gHideSelects = true;
  }
  
  // Add onclick handlers to 'a' elements of class submodal or submodal-width-height
  var elms = document.getElementsByTagName('a');
  for (i = 0; i < elms.length; i++) {
    if (elms[i].className.indexOf("submodal") >= 0) { 
      elms[i].onclick = function(){
        // default width and height
        var width = 400;
        var height = 200;
        // Parse out optional width and height from className
        var startIndex = this.className.indexOf("submodal");
        var endIndex = this.className.indexOf(" ", startIndex);
        if (endIndex < 0) {
          endIndex = this.className.length;
        }
        var clazz = this.className.substring(startIndex, endIndex);
        params = clazz.split('-');
        if (params.length == 3) {
          width = parseInt(params[1]);
          height = parseInt(params[2]);
        }
        showPopWin(this.href,width,height,null); return false;
      }
    }
  }
}
addEvent(window, "load", initPopUp);

 /**
  * @argument width - int in pixels
  * @argument height - int in pixels
  * @argument url - url to display
  * @argument returnFunc - function to call when returning true from the window.
  */

function showPopWin(url, width, height, returnFunc) {
  gPopupIsShown = true;
  disableTabIndexes();
  gPopupMask.style.display = "block";
  gPopupContainer.style.display = "block";
  centerPopWin(width, height);
  var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
  gPopupContainer.style.width = width + "px";
  gPopupContainer.style.height = (height+titleBarHeight) + "px";
  gPopFrame.style.width = parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";
  gPopFrame.style.height = (height) + "px";
  gPopFrame.src = url;
  gReturnFunc = returnFunc;
  // for IE
  if (gHideSelects == true) {
    hideSelectBoxes();
  }
  window.setTimeout("setPopTitleAndRewriteTargets();", 100);
}

//
var gi = 0;
function centerPopWin(width, height) {
  if (gPopupIsShown == true) {
    if (width == null || isNaN(width)) {
      width = gPopupContainer.offsetWidth;
    }
    if (height == null) {
      height = gPopupContainer.offsetHeight;
    }
    var fullHeight = getViewportHeight();
    var fullWidth = getViewportWidth();
    // scLeft and scTop changes by Thomas Risberg
    var scLeft,scTop;
    if (self.pageYOffset) {
      scLeft = self.pageXOffset;
      scTop = self.pageYOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) {
      scLeft = document.documentElement.scrollLeft;
      scTop = document.documentElement.scrollTop;
    } else if (document.body) {
      scLeft = document.body.scrollLeft;
      scTop = document.body.scrollTop;
    } 
    gPopupMask.style.height = fullHeight + "px";
    gPopupMask.style.width = fullWidth + "px";
    gPopupMask.style.top = scTop + "px";
    gPopupMask.style.left = scLeft + "px";
    window.status = gPopupMask.style.top + " " + gPopupMask.style.left + " " + gi++;
    var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
    var topMargin = scTop + ((fullHeight - (height+titleBarHeight)) / 2);
    if (topMargin < 0) { topMargin = 0; }
    gPopupContainer.style.top = topMargin + "px";
    gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
  }
}
addEvent(window, "resize", centerPopWin);
//addEvent(window, "scroll", centerPopWin);
window.onscroll = centerPopWin;

/**
 * @argument callReturnFunc - bool - determines if we call the return function specified
 * @argument returnVal - anything - return value 
 */
function hidePopWin(callReturnFunc) {
  gPopupIsShown = false;
  restoreTabIndexes();
  if (gPopupMask == null) {
    return;
  }
  gPopupMask.style.display = "none";
  gPopupContainer.style.display = "none";
  if (callReturnFunc == true && gReturnFunc != null) {
    gReturnFunc(window.frames["popupFrame"].returnVal);
  }
  gPopFrame.src = gLoading;
  // display all select boxes
  if (gHideSelects == true) {
    displaySelectBoxes();
  }
}

/**
 * Sets the popup title based on the title of the html document it contains.
 * Also adds a base attribute so links and forms will jump out out of the iframe
 * unless a base or target is already explicitly set.
 * Uses a timeout to keep checking until the title is valid.
 */
function setPopTitleAndRewriteTargets() {
  if (window.frames["popupFrame"].document.title == null) {
    window.setTimeout("setPopTitleAndRewriteTargets();", 10);
  } else {
    var popupDocument = window.frames["popupFrame"].document;
    document.getElementById("popupTitle").innerHTML = popupDocument.title;
    if (popupDocument.getElementsByTagName('base').length < 1) {
      var aList  = window.frames["popupFrame"].document.getElementsByTagName('a');
      for (var i = 0; i < aList.length; i++) {
        if (aList.target == null) aList[i].target='_parent';
      }
      var fList  = window.frames["popupFrame"].document.getElementsByTagName('form');
      for (i = 0; i < fList.length; i++) {
        if (fList.target == null) fList[i].target='_parent';
      }
    }
  }
}

// Tab key trap. iff popup is shown and key was [TAB], suppress it.
// @argument e - event - keyboard event that caused this function to be called.
function keyDownHandler(e) {
    if (gPopupIsShown && e.keyCode == 9)  return false;
}

// For IE.  Go through predefined tags and disable tabbing into them.
function disableTabIndexes() {
  if (document.all) {
    var i = 0;
    for (var j = 0; j < gTabbableTags.length; j++) {
      var tagElements = document.getElementsByTagName(gTabbableTags[j]);
      for (var k = 0 ; k < tagElements.length; k++) {
        gTabIndexes[i] = tagElements[k].tabIndex;
        tagElements[k].tabIndex="-1";
        i++;
      }
    }
  }
}

// For IE. Restore tab-indexes.
function restoreTabIndexes() {
  if (document.all) {
    var i = 0;
    for (var j = 0; j < gTabbableTags.length; j++) {
      var tagElements = document.getElementsByTagName(gTabbableTags[j]);
      for (var k = 0 ; k < tagElements.length; k++) {
        tagElements[k].tabIndex = gTabIndexes[i];
        tagElements[k].tabEnabled = true;
        i++;
      }
    }
  }
}

/**
* Hides all drop down form select boxes on the screen so they do not appear above the mask layer.
* IE has a problem with wanted select form tags to always be the topmost z-index or layer
* Thanks for the code Scott!
*/
function hideSelectBoxes() {
  for(var i = 0; i < document.forms.length; i++) {
    for(var e = 0; e < document.forms[i].length; e++){
      if(document.forms[i].elements[e].tagName == "SELECT") {
        document.forms[i].elements[e].style.visibility="hidden";
      }
    }
  }
}

/**
* Makes all drop down form select boxes on the screen visible so they do not reappear after the dialog is closed.
* IE has a problem with wanted select form tags to always be the topmost z-index or layer
*/
function displaySelectBoxes() {
  for(var i = 0; i < document.forms.length; i++) {
    for(var e = 0; e < document.forms[i].length; e++){
      if(document.forms[i].elements[e].tagName == "SELECT") {
      document.forms[i].elements[e].style.visibility="visible";
      }
    }
  }
}

/**
 * X-browser event handler attachment and detachment
 * @argument obj - the object to attach event to
 * @argument evType - name of the event - DONT ADD "on", pass only "mouseover", etc
 * @argument fn - function to call
 */
function addEvent(obj, evType, fn){
 if (obj.addEventListener){
    obj.addEventListener(evType, fn, false);
    return true;
 } else if (obj.attachEvent){
    var r = obj.attachEvent("on"+evType, fn);
    return r;
 } else {
    return false;
 }
}

/**
 * Code below taken from - http://www.evolt.org/article/document_body_doctype_switching_and_more/17/30655/ *
 * Modified 4/22/04 to work with Opera/Moz (by webmaster at subimage dot com)
 * Gets the full width/height because it's different for most browsers.
 */
function getViewportHeight() {
  if (window.innerHeight!=window.undefined) return window.innerHeight;
  if (document.compatMode=='CSS1Compat') return document.documentElement.clientHeight;
  if (document.body) return document.body.clientHeight; 
  return window.undefined; 
}

function getViewportWidth() {
  if (window.innerWidth!=window.undefined) return window.innerWidth; 
  if (document.compatMode=='CSS1Compat') return document.documentElement.clientWidth; 
  if (document.body) return document.body.clientWidth; 
  return window.undefined; 
}