/**
 * Modified version of the following script:
 *
 *  - Search Engine Keyword Highlight (http://fucoder.com/code/se-hilite/)
 *
 * @author Scott Yang <http://scott.yang.id.au/>
 * @version 1.5
 *
 * Updated on 8/30/2007 by Ed Curtis to remove search engine support and added
 * support for using an external definition of terms to highlight as well as
 * adding the ability to add definitions to the highlighted words.
 *
 */

var glossary = new Array();
var glossaryItems = new Array('test','bob');

glossary['test'] = 'test';
glossary['bob'] = 'bob';



// Configuration:
Hilite = {
    /**
     * Element ID to be highlighted. If set, then only content inside this DOM
     * element will be highlighted, otherwise everything inside document.body
     * will be searched.
     */
    elementSelector: '.PrimaryRegion .Content',
    
    /**
     * Whether we are matching an exact word. For example, searching for
     * "highlight" will only match "highlight" but not "highlighting" if exact
     * is set to true.
     */
    exact: true,

    /**
     * Maximum number of DOM nodes to test, before handing the control back to
     * the GUI thread. This prevents locking up the UI when parsing and
     * replacing inside a large document.
     */
    max_nodes: 1000,

    /**
     * Whether to automatically hilite a section of the HTML document, by
     * binding the "Hilite.hilite()" to window.onload() event. If this
     * attribute is set to false, you can still manually trigger the hilite by
     * calling Hilite.hilite() in Javascript after document has been fully
     * loaded.
     */
    onload: true,

    /**
     * Name of the style to be used. Default to 'hilite'.
     */
    style_name: 'Definition',
    
	/**
	 * Array of terms to search for and highlight
	 */
	terms: glossaryItems,

	/**
	 * Associative array that corresponds to the terms array and has the
	 * definitions/content for the terms.
	 */
	definitions: glossary
};


/**
 * Highlight a DOM element with a list of keywords.
 */
Hilite.hiliteElement = function(elm, query) {
    if (!query || elm.childNodes.length == 0)
	return;

    var qre = new Array();
    for (var i = 0; i < query.length; i ++) {
        query[i] = query[i].toLowerCase();
        if (Hilite.exact)
            qre.push('\\b'+query[i]+'\\b');
        else
            qre.push(query[i]);
    }

    qre = new RegExp(qre.join("|"), "i");

/*
    var stylemapper = {};
    for (var i = 0; i < query.length; i ++) {
        if (Hilite.style_name_suffix)
            stylemapper[query[i]] = Hilite.style_name+(i+1);
        else
            stylemapper[query[i]] = Hilite.style_name;
    }
*/

    var textproc = function(node) {
        var match = qre.exec(node.data);
        if (match) {
            var val = match[0];
            var k = '';
            var node2 = node.splitText(match.index);
            var node3 = node2.splitText(val.length);

            var span = node.ownerDocument.createElement('ACRONYM');
            node.parentNode.replaceChild(span, node2);

			span.setAttribute("title", Hilite.definitions[match[0]]);

			span.className = Hilite.style_name;

            span.appendChild(node2);
            return span;
        } else {
            return node;
        }
    };
    Hilite.walkElements(elm.childNodes[0], 1, textproc);
};

/**
 * Highlight a HTML document using keywords extracted from document.referrer.
 * This is the main function to be called to perform search engine highlight
 * on a document.
 *
 * Currently it would check for DOM element 'content', element 'container' and
 * then document.body in that order, so it only highlights appropriate section
 * on WordPress and Movable Type pages.
 */
Hilite.hilite = function() {
	if (Hilite.terms.length == 0) {
		return;
	}
	
	$(Hilite.elementSelector).each(
		function(i) {
			Hilite.hiliteElement(this, Hilite.terms);		
		}
	);
};

Hilite.walkElements = function(node, depth, textproc) {
    var skipre = /^(script|style|textarea|a)/i;
    var count = 0;
    while (node && depth > 0) {
        count ++;
        if (count >= Hilite.max_nodes) {
            var handler = function() {
                Hilite.walkElements(node, depth, textproc);
            };
            setTimeout(handler, 50);
            return;
        }

        if (node.nodeType == 1) { // ELEMENT_NODE
            if (!skipre.test(node.tagName) && node.childNodes.length > 0) {
                node = node.childNodes[0];
                depth ++;
                continue;
            }
        } else if (node.nodeType == 3) { // TEXT_NODE
            node = textproc(node);
        }

        if (node.nextSibling) {
            node = node.nextSibling;
        } else {
            while (depth > 0) {
                node = node.parentNode;
                depth --;
                if (node.nextSibling) {
                    node = node.nextSibling;
                    break;
                }
            }
        }
    }
};

// Trigger the highlight using the onload handler.
$(Hilite.hilite);

/*
if (Hilite.onload) {
    if (window.attachEvent) {
        window.attachEvent('onload', Hilite.hilite);
    } else if (window.addEventListener) {
        window.addEventListener('load', Hilite.hilite, false);
    } else {
        var __onload = window.onload;
        window.onload = function() {
            Hilite.hilite();
            __onload();
        };
    }
}
*/