/**
 * 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
 *
 * Edited 2009-07-13 - Huug Helmink - now it works with MooTools
 */

// 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.body);
	popmask = new Element('div',{'id':'popupMask'});
	popcont = new Element('div',{'id':'popupContainer'});
	popcont.innerHTML = '' +
		'<div id="popupInner">' +
			'<div id="popupTitleBar">' +
				'<div id="popupTitle"></div>' +
				'<div id="popupControls">' +
					'<img src="/_scripts/submodal/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 = $('popupMask');
	gPopupContainer = $('popupContainer');
	gPopFrame = $('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 = $$('a');
	for (i = 0; i < elms.length; i++) {
		if (elms[i].className.indexOf('submodal') == 0) { 

      elms[i].addEvent('click',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;
			});
		}
	}
}

window.addEvent('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) {
	// show or hide the window close widget
	if (showCloseBox == null || showCloseBox == true) {
    $('popCloseBox').setStyle('display','block');
	} else {
    $('popCloseBox').setStyle('display','none');
	}
	gPopupIsShown = true;
	disableTabIndexes();
	gPopupMask.setStyle('display','block');
	gPopupContainer.setStyle('display','block');
	// calculate where to place the window on screen
	centerPopWin(width, height);
	
	var titleBarHeight = parseInt($('popupTitleBar').offsetHeight, 10);


	gPopupContainer.setStyle('width',width + 'px');
	gPopupContainer.setStyle('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.setStyle('width',parseInt($('popupTitleBar').offsetWidth, 10) + 'px');
	gPopFrame.setStyle('height',(height) + 'px');
	
	// set the url
	gPopFrame.src = url;
	
	gReturnFunc = returnFunc;
	// for IE
	if (gHideSelects == true) {
		hideSelectBoxes();
	}
	
	window.setTimeout("setPopTitle();", 600);
}

//
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.body);
		var scTop = parseInt(getScrollTop(),10);
		var scLeft = parseInt(theBody.scrollLeft,10);
	
		setMaskSize();
		
		var titleBarHeight = parseInt($('popupTitleBar').offsetHeight, 10);
		
		var fullHeight = window.getSize().y;
		var fullWidth = window.getSize().x;
		
		gPopupContainer.setStyle('top', (scTop + ((fullHeight - (height+titleBarHeight)) / 2)) + 'px');
		gPopupContainer.setStyle('left', (scLeft + ((fullWidth - width) / 2)) + 'px');
	}
}

window.addEvent('resize',centerPopWin);

window.addEvent('scroll',centerPopWin);
window.onscroll = centerPopWin;


/**
 * Sets the size of the popup mask.
 *
 */
function setMaskSize() {
	var theBody = $(document.body);
			
	var fullHeight = window.getSize().y;
	var fullWidth = window.getSize().x;
	
	// 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.setStyle('height', popHeight + 'px');
	gPopupMask.setStyle('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.body); //document.getElementsByTagName("BODY")[0];
	theBody.style.overflow = '';
	restoreTabIndexes();
	if (gPopupMask == null) {
		return;
	}
	gPopupMask.setStyle('display','none');
	gPopupContainer.setStyle('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 {
		$('popupTitle').set('html',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 = $$(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 = $$(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 = $$('select');

  for (i=0;x && i < x.length; i++) {
    x[i].setStyle('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 = $$('select');

  for (i=0;x && i < x.length; i++){
    x[i].setStyle('visibility','visible');
  }
}