/**
 * SUBMODAL v1.5
 * Used for displaying DHTML only popups instead of using buggy modal windows.
 *
 * By Seth Banks
 * http://www.subimage.com/
 *
 * Contributions by:
 *  Eric Angel - tab index code
 *  Scott - hiding/showing selects for IE users
 *  Todd Huss - inserting modal dynamically and anchor classes
 *  Tom Rice - allow source HTML instead of source url for display
 *             Still uses source URL for stylesheetes, etc....
 *
 * Up to date code can be found at http://www.subimage.com/dhtml/subModal
 * 
 *
 * This code is free for you to use anywhere, just keep this comment block.
 */

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gDefaultPage = "../includes/blank.html";
var gHideSelects = false;
var gReturnVal = null;
var imgDir = '../images/';
var scrolling = 'no';
var adminLoc = '';
var gPopupTitle = '';
var gCenterPopup = true;


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;
}



/**
 * Initializes popup code on load.  
 */
function initPopUp() {

  // Add the HTML to the body
  theBody = document.getElementsByTagName('BODY')[0];
  popmask = document.createElement('div');
  popmask.id = 'popupMask';
  popcont = document.createElement('div');
  popcont.id = 'popupContainer';
  popcont.innerHTML = '' +
    '<div id="popupInner">' +
      '<div id="popupTitleBar">' +
        '<div id="popupTitle"></div>' +
        '<div id="popupControls">' +
          '<img src="' + imgDir + 'close.gif" onclick="hidePopWin(true);" id="popCloseBox" />' +
        '</div>' +
      '</div>' +
      '<iframe src="'+ gDefaultPage +'" style="width:100%;height:100%;background-color:transparent;" scrolling="auto" frameborder="0" allowtransparency="true" id="popupFrame" name="popupFrame" width="100%" height="100%"></iframe>' +
    '</div>';
  theBody.appendChild(popmask);
  theBody.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) { 
      // var onclick = 'function (){showPopWin(\''+elms[i].href+'\','+width+', '+height+', null);return false;};';
      // elms[i].onclick = eval(onclick);
      elms[i].onclick = function(){
        // default width and height
        var width = 400;
        var height = 200;
        // Parse out optional width and height from className
        params = this.className.split('-');
        if (params.length == 3) {
          width = parseInt(params[1]);
          height = parseInt(params[2]);
        }
        showPopWin(this.href,'',width,height,null,true); return false;
      }
    }
  }
}
addEvent(window, "load", initPopUp);

 /**
  * @argument url - url to display
  * @argument src - HTML source to display
  * @argument width - int in pixels
  * @argument height - int in pixels
  * @argument returnFunc - function to call when returning true from the window.
  * @argument showCloseBox - show the close box - default true
  */

function showPopWin(url, src, width, height, returnFunc) {
  var showCloseBox=true;
  if (showPopWin.arguments.length>5)
    showCloseBox=showPopWin.arguments[5];
  // show or hide the window close widget
  if (showCloseBox == null || showCloseBox == true) {
    document.getElementById("popCloseBox").style.display = "block";
  } else {
    document.getElementById("popCloseBox").style.display = "none";
  }
  
  gPopupIsShown = true;
  disableTabIndexes();
  gPopupMask.style.display = "block";
  gPopupContainer.style.display = "block";
  // calculate where to place the window on screen
  centerPopWin(width, height, true);
  
  var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);

  gPopupContainer.style.width = width + "px";
  gPopupContainer.style.height = (height+titleBarHeight) + "px";
  
  setMaskSize();

  // need to set the width of the iframe to the title bar width because of the dropshadow
  // some oddness was occuring and causing the frame to poke outside the border in IE6
  gPopFrame.style.width = parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";
  gPopFrame.style.height = (height) + "px";

  // set the url or InnerHTML is src passed
  if (src != '' ) {
    window.frames['popupFrame'].document.body.innerHTML = src;
  }
  else
    gPopFrame.src = url;
  
  gReturnFunc = returnFunc;
  // for IE
  if (gHideSelects == true) {
    hideSelectBoxes();
  }
  
  window.setTimeout("setPopTitle();", 600);
}

//
var gi = 0;
function forceCenterPopWin(){
  centerPopWin(null,null,true);
}

function centerPopWin(width, height) {
  var centerPopup = gCenterPopup;
  if (centerPopWin.arguments.length > 2)
    centerPopup = centerPopWin.arguments[2];
    
  if (gPopupIsShown == true && centerPopup) {
    if (width == null || isNaN(width)) {
      width = gPopupContainer.offsetWidth;
    }
    if (height == null) {
      height = gPopupContainer.offsetHeight;
    }
    
    //var theBody = document.documentElement;
    var theBody = document.getElementsByTagName("BODY")[0];
    //theBody.style.overflow = "hidden";
    var scTop = parseInt(getScrollTop(),10);
    var scLeft = parseInt(theBody.scrollLeft,10);
  
    setMaskSize();
    
    //window.status = gPopupMask.style.top + " " + gPopupMask.style.left + " " + gi++;
    
    var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);
    
    var fullHeight = getViewportHeight();
    var fullWidth = getViewportWidth();
    
    gPopupContainer.style.top = (scTop + ((fullHeight - (height+titleBarHeight)) / 2)) + "px";
    gPopupContainer.style.left =  (scLeft + ((fullWidth - width) / 2)) + "px";
    //alert(fullWidth + " " + width + " " + gPopupContainer.style.left);
  }
}
addEvent(window, "resize", forceCenterPopWin);
addEvent(window, "scroll", centerPopWin);
window.onscroll = centerPopWin;


/**
 * Sets the size of the popup mask.
 *
 */
function setMaskSize() {
  var theBody = document.getElementsByTagName("BODY")[0];
      
  var fullHeight = getViewportHeight();
  var fullWidth = getViewportWidth();
  
  // Determine what's bigger, scrollHeight or fullHeight / width
  if (fullHeight > theBody.scrollHeight) {
    popHeight = fullHeight;
  } else {
    popHeight = theBody.scrollHeight;
  }
  
  if (fullWidth > theBody.scrollWidth) {
    popWidth = fullWidth;
  } else {
    popWidth = theBody.scrollWidth;
  }
  
  gPopupMask.style.height = popHeight + "px";
  gPopupMask.style.width = popWidth + "px";
}

/**
 * @argument callReturnFunc - bool - determines if we call the return function specified
 * @argument returnVal - anything - return value 
 */

function hidePopWin(callReturnFunc) {
  gPopupIsShown = false;
  gPopupTitle = '';
  scrolling = 'no';
  try {
    var theBody = document.getElementsByTagName("BODY")[0];
    theBody.style.overflow = "";
  }
  catch (e) {
    //No Error
  }
  restoreTabIndexes();
  if (gPopupMask == null) {
    return;
  }
  gPopupMask.style.display = "none";
  gPopupContainer.style.display = "none";
  try {
    window.frames['popupFrame'].document.body.innerHTML = '';
  }
  catch (e) {
    //No Error
  }

  if (callReturnFunc == true && gReturnFunc != null) {
    // Set the return code to run in a timeout.
    // Was having issues using with an Ajax.Request();
    try {
      gReturnVal = window.frames["popupFrame"].returnVal;
    }
    catch (e) {
      // Not everything has a Return Value?;
    }
    window.setTimeout('gReturnFunc(gReturnVal);', 5);
  }
  gPopFrame.src = gDefaultPage;
  // display all select boxes
  if (gHideSelects == true) {
    displaySelectBoxes();
  }
}

/**
 * Sets the popup title based on the title of the html document it contains.
 * Uses a timeout to keep checking until the title is valid.
 */
function setPopTitle() {
  return;
  if (window.frames["popupFrame"].document.title == null) {
    window.setTimeout("setPopTitle();", 10);
  } else {
    document.getElementById("popupTitle").innerHTML = window.frames["popupFrame"].document.title;
  }
}

// Tab key trap. if 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() {
  if (adminLoc==''){
    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() {
  if (adminLoc==''){
    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";
        }
      }
    }
  }
}

function resetPopWin(width,height) {
  centerPopWin(width, height);
  
  var titleBarHeight = parseInt(document.getElementById("popupTitleBar").offsetHeight, 10);

  gPopupContainer.style.width = width + "px";
  gPopupContainer.style.height = (height+titleBarHeight) + "px";
  
  setMaskSize();

  // need to set the width of the iframe to the title bar width because of the dropshadow
  // some oddness was occuring and causing the frame to poke outside the border in IE6
  gPopFrame.style.width = parseInt(document.getElementById("popupTitleBar").offsetWidth, 10) + "px";
  gPopFrame.style.height = (height) + "px";

}