/* Greybox Redux Redux Again
 * Required: http://jquery.com/
 * Written by: John Resig
 * Based on code by: 4mir Salihefendic (http://amix.dk) 
 * Turned into plugin by Dave McFarland
 * License: LGPL (read more in LGPL.txt)
 */


(function($) {

    var settings; //global to this function
    var GB_DONE = false;

    $.fn.greybox = function(callerSettings) {
        var GB_done = false;

        settings = $.extend({
            gbHeight: 400,
            gbWidth: 400,
            captionHeight: 18,
            ffMacFlash: false
        }, callerSettings || {});

        return this.click(function(evt) {
            evt.preventDefault();
            var t = this.title || $(this).text() || this.href;
            GB_show(t, this.href, evt, settings);
        });
    } // end of greybox function

    var GB_hide = function() {
        $("#GB_window,#GB_overlay").hide();
    }

    var GB_show = function(caption, url) {
        if (!settings.GB_DONE) {
            $(document.body)
      .append('<div id="GB_overlay"></div><div id="GB_window"><div id="GB_loading"></div><div id="GB_caption"></div></div>');

            //make overlay fill entire height of doc
            var docH = $(document).height();
            $('#GB_overlay').css('height', docH);
            var docW = $(document).width();
            $('#GB_overlay').css('width', docW);

            if (isMacFF() && settings.ffMacFlash) {
                $("#GB_overlay").addClass("GB_overlayMacFFBGHack"); //use png overlay so hide flash
            } else {
                $("#GB_overlay").addClass("GB_overlayBG"); //use background and opacity
            }

            $('#GB_caption')
       .click(GB_hide)
       .css({
           height: settings.captionHeight,
           lineHeight: settings.captionHeight + 'px'
       });
            $("#GB_overlay").click(GB_hide);
            $(window).resize(GB_position);
            settings.GB_DONE = true;
        }

        $("#GB_frame").remove(); // remove previous iFrame
        $("#GB_caption").html(caption); // add caption
        $("#GB_overlay").show(); // show grey overlay
        $('#GB_loading').show();
        GB_position(); // resize and place in middle of window
        $("#GB_window").append("<iframe id='GB_frame' src='" + url + "'></iframe>");

        $("#GB_frame").css("height", settings.gbHeight - settings.captionHeight - 5 + "px");
        $("#GB_frame").bind('load', function() { $('#GB_loading').hide() });
        $('#GB_window').show();


    }

    var GB_position = function() {
        var de = document.documentElement;
        var w = self.innerWidth || (de && de.clientWidth) || document.body.clientWidth;
        var h = self.innerHeight || (de && de.clientHeight) || document.body.clientHeight;
        $("#GB_window").css({
            width: settings.gbWidth + "px",
            height: settings.gbHeight + "px",
            left: ((w - settings.gbWidth) / 2) + "px",
            top: (((h - settings.gbHeight) / 2) - 15) + "px"
        });

    }

    var isMacFF = function() {
        var userAgent = navigator.userAgent.toLowerCase();
        if (userAgent.indexOf('mac') != -1 && $.browser.mozilla) {
            return true;
        } else {
            return false;
        }
    }

})(jQuery);