(function ($) {
    $.fn.iframeTracker = function (handler) {
        var target = this.get();
        if (handler === null || handler === false) {
            $.iframeTracker.untrack(target);
        } else if (typeof handler == "object") {
            $.iframeTracker.track(target, handler);
        } else {
            throw new Error(
                "Wrong handler type (must be an object, or null|false to untrack)"
            );
        }
    };
    $.iframeTracker = {
        focusRetriever: null,
        focusRetrieved: false,
        handlersList: [],
        isIE8AndOlder: false,
        init: function () {
            try {
                if ($.browser.msie == true && $.browser.version < 9) {
                    this.isIE8AndOlder = true;
                }
            } catch (ex) {
                try {
                    var matches = navigator.userAgent.match(/(msie) ([\w.]+)/i);
                    if (matches[2] < 9) {
                        this.isIE8AndOlder = true;
                    }
                } catch (ex2) {}
            }
            $(window).focus();
            $(window).blur(function (e) {
                $.iframeTracker.windowLoseFocus(e);
            });
            $("body").append(
                '<div style="position:fixed; top:0; left:0; overflow:hidden;"><input style="position:absolute; left:-300px;" type="text" value="" id="focus_retriever" readonly="true" /></div>'
            );
            this.focusRetriever = $("#focus_retriever");
            this.focusRetrieved = false;
            $(document).mousemove(function (e) {
                if (
                    document.activeElement &&
                    document.activeElement.tagName == "IFRAME"
                ) {
                    $.iframeTracker.focusRetriever.focus();
                    $.iframeTracker.focusRetrieved = true;
                }
            });
            if (this.isIE8AndOlder) {
                this.focusRetriever.blur(function (e) {
                    e.stopPropagation();
                    e.preventDefault();
                    $.iframeTracker.windowLoseFocus(e);
                });
                $("body").click(function (e) {
                    $(window).focus();
                });
                $("form").click(function (e) {
                    e.stopPropagation();
                });
                try {
                    $("body").on("click", "form", function (e) {
                        e.stopPropagation();
                    });
                } catch (ex) {
                    console.log(
                        "[iframeTracker] Please update jQuery to 1.7 or newer. (exception: " +
                            ex.message +
                            ")"
                    );
                }
            }
        },
        track: function (target, handler) {
            handler.target = target;
            $.iframeTracker.handlersList.push(handler);
            $(target)
                .bind(
                    "mouseover",
                    { handler: handler },
                    $.iframeTracker.mouseoverListener
                )
                .bind(
                    "mouseout",
                    { handler: handler },
                    $.iframeTracker.mouseoutListener
                );
        },
        untrack: function (target) {
            if (typeof Array.prototype.filter != "function") {
                console.log(
                    "Your browser doesn't support Array filter, untrack disabled"
                );
                return;
            }
            $(target).each(function (index) {
                $(this)
                    .unbind("mouseover", $.iframeTracker.mouseoverListener)
                    .unbind("mouseout", $.iframeTracker.mouseoutListener);
            });
            var nullFilter = function (value) {
                return value === null ? false : true;
            };
            for (var i in this.handlersList) {
                for (var j in this.handlersList[i].target) {
                    if (
                        $.inArray(this.handlersList[i].target[j], target) !== -1
                    ) {
                        this.handlersList[i].target[j] = null;
                    }
                }
                this.handlersList[i].target =
                    this.handlersList[i].target.filter(nullFilter);
                if (this.handlersList[i].target.length == 0) {
                    this.handlersList[i] = null;
                }
            }
            this.handlersList = this.handlersList.filter(nullFilter);
        },
        mouseoverListener: function (e) {
            e.data.handler.over = true;
            try {
                e.data.handler.overCallback(this);
            } catch (ex) {}
        },
        mouseoutListener: function (e) {
            e.data.handler.over = false;
            $.iframeTracker.focusRetriever.focus();
            try {
                e.data.handler.outCallback(this);
            } catch (ex) {}
        },
        windowLoseFocus: function (event) {
            for (var i in this.handlersList) {
                if (this.handlersList[i].over == true) {
                    try {
                        this.handlersList[i].blurCallback();
                    } catch (ex) {}
                }
            }
        },
    };
    $(document).ready(function () {
        $.iframeTracker.init();
    });
})(jQuery);