/**
 * 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
 *
 * 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 = "/submodal/loading.html";
var gHideSelects = true;
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"></div>' +
                                '<div id="popupControls">' +
                                        '<img src="/submodal/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); 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) {
        // 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);
}

//
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 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;
        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() {
        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";
                        }
                }
        }
}