//  autonav.js -- GSSI Auto-highlighting script

//  http://www.graphicallyspeaking.ca/

//  Version 1.7.0

//  Requires yahoo-dom-event.js

//

//  CHANGELOG

//  2009-01-12  Fixed still-broken regex

//              Added auto-breadcrumbs

//  2008-12-09  Fixed templateParentPage index page bug

//  2008-11-04  Removed short variables pointing to YAHOO namespaces 

//              (causing variable naming conflict with Prototype)

//  2008-10-30  Fixed violently broken regex in extractPageName() -- Damien

//  2008-10-29  Added IE6 / IE7 bug fix for templateParentPage

//  2008-10-23  Added style block that hides navigation until classes are added.

//  2008-09-16  Re-introduced navigationList variable, fixed invalid href bug

//              Replaced the replace with a regular expression





var templateParentPage;

var navigationList = 'subnav';



document.write('<style type="text/css"> #' + navigationList + ' { display: none; } </style> ');



YAHOO.util.Event.onAvailable(navigationList, function () {

    menuItems = YAHOO.util.Dom.getElementsBy(function () { return true; }, 'a', navigationList);

    if (!templateParentPage) {

        setActiveMenu(menuItems, extractPageName(document.URL));

    }

    else {

        var link = document.createElement('a');

        link.setAttribute('href', templateParentPage);



        if (link.href) {

            var newLink = '';

            if (link.href.indexOf(document.domain) == -1) {

                if (link.href.indexOf('https://') != -1)

                    newLink = 'https://' + document.domain + link.href;

                else

                    newLink = 'http://' + document.domain + link.href;

            }

            else

                newLink = link.href;

            setActiveMenu(menuItems, extractPageName(newLink));

        }



    }

    sublists = YAHOO.util.Dom.getElementsBy(function () { return true; }, 'ul', navigationList);

    setActiveList(sublists);



    YAHOO.util.Dom.get(navigationList).style.display = 'block';

    var breadcrumbs = YAHOO.util.Dom.get('breadcrumbs');

    if (breadcrumbs) buildBreadcrumbs(breadcrumbs);

});



function extractPageName(uStr) {

    var currentPage = uStr;

    if (currentPage.indexOf('#') > -1) {

        currentPage = currentPage.substr(0, currentPage.indexOf('#'));

    }

    if (currentPage.indexOf('?') > -1) {

        currentPage = currentPage.substr(0, currentPage.indexOf('?'));

    }

    currentPage = currentPage.replace(/(default|index)\.(html|htm|aspx|asp|php)/, '');



    return currentPage;

}





function setActiveList(arr) {

    var topNode = YAHOO.util.Dom.get(navigationList);

    for (var i = 0; i < arr.length; i++) {

        if (arr[i].id != navigationList) {

            if (!YAHOO.util.Dom.hasClass(arr[i], 'active')) {

                YAHOO.util.Dom.addClass(arr[i], 'inactive');

            }

            YAHOO.util.Dom.addClass(YAHOO.util.Dom.getAncestorByTagName(arr[i], 'LI'), 'more');

        }

    }

}

// search through all the links in array, if one points to

// the same file, apply the class .active to it and to all its parents

// until it reaches the top node



function setActiveMenu(arr, crtPage) {

    var topNode = YAHOO.util.Dom.get(navigationList);

    for (var i = 0; i < arr.length; i++) {

        if ((arr[i].href) && (extractPageName(arr[i].href) == crtPage)) {

            YAHOO.util.Dom.addClass(arr[i], 'active');

            var currNode = arr[i];

            while (currNode != topNode) {

                YAHOO.util.Dom.addClass(currNode, 'active');

                if (currNode.tagName == 'LI') {

                    YAHOO.util.Dom.addClass(YAHOO.util.Dom.getFirstChild(currNode), 'active');

                }

                currNode = currNode.parentNode;

            }

        }

    }

}

function buildBreadcrumbs(target) {

    var els = YAHOO.util.Dom.getElementsByClassName('active', 'a', navigationList);

    var bStr = '';



    if (els.length == 0) {

        bStr = '<span>Home</span>';

    }

    else {

        bStr = '<a href="/">Home</a>';

    }

    for (var i = 0; i < els.length; i++) {

        if (i == els.length - 1 && !templateParentPage) {

            bStr = bStr + ' &#62; <span>' + els[i].innerHTML + '</span>';

        }

        else {

            bStr = bStr + ' &#62; <a href="' + els[i].href + '">' + els[i].innerHTML + '</a>';

        }

    }

    if (templateParentPage) {

        bStr = bStr + ' &#62; <span>' + thisPageName + '</span>';

    }

    target.innerHTML = bStr;

}