/* Greybox Redux
 * Required: http://jquery.com/
 * Written by: John Resig
 * Reworked by: Benjamin Yu (http://foofiles.com/, http://badpopcorn.com/)
 * Based on code by: 4mir Salihefendic (http://amix.dk)
 * License: LGPL (read more in LGPL.txt)
 *
 * @name Greybox
 * @cat Plugins/Greybox
 */

/*
  Defaults, all configurable via options:
  {
    close_img: "close.gif",
    height: 400,
    width: 400,
    animation: false,
    overlay_clickable: true,
    overflow: "auto",
    callback: null,
    caption: ""
  }
*/
(function() {
    var settings = {};

    GB_getPageScrollTop = function(){
        var yScrolltop;
        var xScrollleft;
        if (self.pageYOffset || self.pageXOffset) {
            yScrolltop = self.pageYOffset;
            xScrollleft = self.pageXOffset;
        } else if(document.documentElement&& document.documentElement.scrollTop
            || document.documentElement.scrollLeft ){   // Explorer 6 Strict
            yScrolltop = document.documentElement.scrollTop;
            xScrollleft = document.documentElement.scrollLeft;
        } else if (document.body) {// all other Explorers
            yScrolltop = document.body.scrollTop;
            xScrollleft = document.body.scrollLeft;
        }
        arrayPageScroll = new Array(xScrollleft,yScrolltop);
        return arrayPageScroll;
    }

    GB_overlay_size = function() {
        try {
            if(window.innerHeight && window.scrollMaxY
                || window.innerWidth && window.scrollMaxX) {
                h = window.innerHeight + window.scrollMaxY;
                w = window.innerWidth + window.scrollMaxX;
                var deff = document.documentElement;
                var wff = (deff&&deff.clientWidth)
                || document.body.clientWidth || window.innerWidth || self.innerWidth;
                var hff = (deff&&deff.clientHeight) || document.body.clientHeight
                || window.innerHeight || self.innerHeight;
                w -= (window.innerWidth - wff);
                h -= (window.innerHeight - hff);
            } else if(document.body.scrollHeight > document.body.offsetHeight
                || document.body.scrollWidth > document.body.offsetWidth) {
                // all but Explorer Mac
                h = document.body.scrollHeight;
                w = document.body.scrollWidth;
            } else {
                // Explorer Mac.would also work in Explorer 6 Strict, Mozilla and Safari
                var left_top = GB_getPageScrollTop();
                h = left_top[1] + settings.height;
                w = left_top[0] + settings.width;
                if( h < document.body.offsetHeight) {
                    h = document.body.offsetHeight;
                }
                if( w < document.body.offsetWidth) {
                    w = document.body.offsetWidth;
                }
            }
        } catch(err) {
            w = jQuery(document.body).width();
            h = jQuery(document.body).height();
        }
        jQuery("#GB_overlay").css({
            "height":h+"px",
            "width":w +"px"
            });
    }

    GB_position = function() {
        var boxWidth = settings.width;
        var boxHeight = settings.height;
        jQuery('#GB_window').css({
            marginLeft: '-' + parseInt(boxWidth / 2) + 'px',
            width: boxWidth + 'px',
            height: settings.height+"px"
        });
        if( !(jQuery.browser.msie && typeof(XMLHttpRequest) == 'function')) {
            // take away IE6
            jQuery('#GB_window').css({
                marginTop: '-' + parseInt(boxHeight / 2)+'px'
                });
        }
        jQuery("#GB_frame").css("height",settings.height - 32 +"px");
    }

    jQuery.GB_hide = function() {
        jQuery("#GB_window,#GB_overlay").remove();
        if(settings.callback && typeof(settings.callback) == 'function') {
            settings.callback.apply();
        }
    }

    jQuery.GB_show = function(url, options) {
        settings = jQuery.extend({
            close_img: "gfx/close.gif",
            height: 400,
            width: 400,
            animation: false,
            overlay_clickable: true,
            overflow: 'auto',
            callback: null,
            caption: ""
        }, options || {});

        jQuery(document.body)
        .append(
            "<div id='GB_overlay'></div>" +
            "<div id='GB_window'><div id='GB_caption'></div>" +
            "<img class='GB_Close_img' src='" + settings.close_img + "' alt='Close window'/></div>");
        jQuery("#GB_window img").click(jQuery.GB_hide);
        if(settings.overlay_clickable) {
            jQuery("#GB_overlay").click(jQuery.GB_hide);
        }

        jQuery("#GB_window")
        .append("<iframe id='GB_frame' src='"+url+"'></iframe>");
        jQuery("#GB_frame").css('overflow',settings.overflow);

        jQuery("#GB_caption").html(settings.caption);

        GB_overlay_size();
        jQuery(window).resize(GB_overlay_size);
        jQuery(window).scroll(GB_overlay_size);
        jQuery("#GB_overlay").show();

        GB_position();

        if(settings.animation) {
            jQuery("#GB_window").slideDown("slow");
        } else {
            jQuery("#GB_window").show();
        }
    }

})();