/*!
 * jquery.overlay 1.0.1. Overlay HTML with eyecandy.
 * 
 * Copyright (c) 2009 Tero Piirainen
 * http://flowplayer.org/tools/overlay.html
 *
 * Dual licensed under MIT and GPL 2+ licenses
 * http://www.opensource.org/licenses
 *
 * Launch  : March 2008
 * Version : 1.0.1 - Wed Feb 18 2009 05:18:24 GMT-0000 (GMT+00:00)
 */
(function($) {
    var instances = [];
    function fireEvent(opts, name, self, arg) {
        var fn = opts[name];
        if ($.isFunction(fn)) {
            try {
                return fn.call(self, arg);
            } catch(error) {
                if (opts.alert) {
                    alert("Error calling overlay." + name + ": " + error);
                } else {
                    throw error;
                }
                return false;
            }
        }
        return true;
    }
    function Overlay(el, opts) {
        var self = this;
        var trigger = null;
        var w = $(window);
        var jq = opts.target || el.attr("rel");
        var o = jq ? $(jq) : null;
        if (!o) {
            o = el;
        } else {
            trigger = el;
        }
        var bg = o.attr("overlay");
        if (!bg) {
            bg = o.css("backgroundImage");
            bg = bg.substring(bg.indexOf("(") + 1, bg.indexOf(")"));
            o.css("backgroundImage", "none");
            o.attr("overlay", bg);
        }
        if (!bg) {
            throw "background-image CSS property not set for overlay element: " + jq;
        }
        bg = bg.replace(/\"/g, "");
        if (opts.preload) {
            $(window).load(function() {
                setTimeout(function() {
                    var img = new Image();
                    img.src = bg;
                },
                2000);
            });
        }
        var oWidth = o.outerWidth({
            margin: true
        });
        var oHeight = o.outerHeight({
            margin: true
        });
        var img = $('<img src="' + bg + '"/>');
        img.css({
            border: 0,
            position: 'absolute'
        }).width(oWidth).hide();
        $('body').append(img);
        if (trigger) {
            trigger.bind("click.overlay",
            function(e) {
                self.load(e.pageY - w.scrollTop(), e.pageX - w.scrollLeft());
                return e.preventDefault();
            });
        }
        if (!opts.close || !o.find(opts.close).length) {
            o.prepend('<div class="close"></div>');
            opts.close = "div.close";
        }
        var closeButton = o.find(opts.close);
        $.extend(self, {
            load: function(top, left) {
                if (self.isOpened()) {
                    return self;
                }
                if (opts.oneInstance) {
                    $.each(instances,
                    function() {
                        this.close();
                    });
                }
                if (fireEvent(opts, "onBeforeLoad", self) === false) {
                    return self;
                }
                top = top || opts.start.top;
                left = left || opts.start.left;
                var toTop = opts.finish.top;
                var toLeft = opts.finish.left;
                if (toTop == 'center') {
                    toTop = Math.max((w.height() - oHeight) / 2 - 30, 0);
                }
                if (toLeft == 'center') {
                    toLeft = Math.max((w.width() - oWidth) / 2, 0);
                }
                if (!opts.start.absolute) {
                    top += w.scrollTop();
                    left += w.scrollLeft();
                }
                if (!opts.finish.absolute) {
                    toTop += w.scrollTop();
                    toLeft += w.scrollLeft();
                }
                img.css({
                    top: top,
                    left: left,
                    width: opts.start.width,
                    zIndex: opts.zIndex
                }).show();
                img.animate({
                    top: toTop,
                    left: toLeft,
                    width: oWidth
                },
                opts.speed,
                function() {
                    o.css({
                        position: 'absolute',
                        top: toTop,
                        left: toLeft
                    });
                    var z = img.css("zIndex");
                    closeButton.add(o).css("zIndex", ++z);
                    o.fadeIn(opts.fadeInSpeed,
                    function() {
                        fireEvent(opts, "onLoad", self);
                    });
                });
                return self;
            },
            getBackgroundImage: function() {
                return img;
            },
            getContent: function() {
                return o;
            },
            getTrigger: function() {
                return trigger;
            },
            isOpened: function() {
                return o.is(":visible");
            },
            getConf: function() {
                return opts;
            },
            close: function() {
                if (!self.isOpened()) {
                    return self;
                }
                if (fireEvent(opts, "onClose", self) === false) {
                    return self;
                }
                if (img.is(":visible")) {
                    img.hide();
                    o.hide();
                }
                return self;
            },
            getVersion: function() {
                return [1, 0, 0];
            },
            expose: function() {
                img.expose();
            }
        });
        closeButton.bind("click.overlay",
        function() {
            self.close();
        });
        w.bind("keypress.overlay",
        function(evt) {
            if (evt.keyCode == 27) {
                self.close();
            }
        });
        if (opts.closeOnClick) {
            w.bind("click.overlay",
            function(evt) {
                if (!o.is(":visible, :animated")) {
                    return;
                }
                var target = $(evt.target);
                if (target.attr("overlay")) {
                    return;
                }
                if (target.parents("[overlay]").length) {
                    return;
                }
                self.close();
            });
        }
    }
    jQuery.prototype.overlay = function(conf) {
        var api = this.eq(typeof conf == 'number' ? conf: 0).data("overlay");
        if (api) {
            return api;
        }
        var w = $(window);
        var opts = {
            start: {
                top: Math.round(w.height() / 2),
                left: Math.round(w.width() / 2),
                width: 0,
                absolute: false
            },
            finish: {
                top: 'center',
                left: 'center',
                absolute: false
            },
            speed: 'normal',
            fadeInSpeed: 'fast',
            close: null,
            oneInstance: true,
            closeOnClick: true,
            preload: true,
            zIndex: 9999,
            target: null,
            alert: true
        };
        if ($.isFunction(conf)) {
            conf = {
                onBeforeLoad: conf
            };
        }
        $.extend(true, opts, conf);
        this.each(function() {
            var instance = new Overlay($(this), opts);
            instances.push(instance);
            $(this).data("overlay", instance);
        });
        return this;
    };
})(jQuery);