/**
 * SUBMODAL v1.6
 * Used for displaying DHTML only popups instead of using buggy modal windows.
 *
 * By Subimage LLC
 * 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
 *
 * Up to date code can be found at http://submodal.googlecode.com
 */

// Popup code
var gPopupMask = null;
var gPopupContainer = null;
var gPopFrame = null;
var gReturnFunc;
var gPopupIsShown = false;
var gDefaultPage = "";
var gHideSelects = false;
var gReturnVal = null;

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">Guia de Ônibus</div>' +
            '<div id="popupControls">' +
               '<img src="images/close.gif" onclick="hidePopWin(false);" 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); 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.
   * @argument showCloseBox - show the close box - default true
   */
function showPopWin(url, width, height, returnFunc, showCloseBox, titulo) {
   // 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);

   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
   gPopFrame.src = url;

   gReturnFunc = returnFunc;
   // for IE
   if (gHideSelects == true) {
      hideSelectBoxes();
   }

   // window.setTimeout("setPopTitle();", 600);
   document.getElementById("popupTitle").innerHTML = titulo;
}

//
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 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", centerPopWin);
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 whats 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;
   var theBody = document.getElementsByTagName("BODY")[0];
   theBody.style.overflow = "";
   restoreTabIndexes();
   if (gPopupMask == null) {
      return;
   }
   gPopupMask.style.display = "none";
   gPopupContainer.style.display = "none";
   if (callReturnFunc == true && gReturnFunc != null) {
      // Set the return code to run in a timeout.
      // Was having issues using with an Ajax.Request();
      gReturnVal = window.frames["popupFrame"].returnVal;
      window.setTimeout('gReturnFunc(gReturnVal);', 1);
   }
   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. 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() {
  var x = document.getElementsByTagName("SELECT");

  for (i=0;x && i < x.length; i++) {
    x[i].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 wanting select form tags to always be the
 * topmost z-index or layer.
 */
function displaySelectBoxes() {
  var x = document.getElementsByTagName("SELECT");

  for (i=0;x && i < x.length; i++){
    x[i].style.visibility = "visible";
  }
}