/*!
    * jQuery blockUI plugin
    * Version 2.39 (23-MAY-2011)
    * @requires jQuery v1.2.3 or later
    *
    * Examples at: http://malsup.com/jquery/block/
    * Copyright (c) 2007-2010 M. Alsup
    * Dual licensed under the MIT and GPL licenses:
    * http://www.opensource.org/licenses/mit-license.php
    * http://www.gnu.org/licenses/gpl.html
    *
    * Thanks to Amir-Hossein Sobhi for some excellent contributions!
    */

    ; (function ($) {

        if (/1\.(0|1|2)\.(0|1|2)/.test($.fn.jquery) || /^1.1/.test($.fn.jquery)) {
            alert('blockUI requires jQuery v1.2.3 or later!  You are using v' + $.fn.jquery);
            return;
        }

        $.fn._fadeIn = $.fn.fadeIn;

        var noOp = function () { };

        // this bit is to ensure we don't call setExpression when we shouldn't (with extra muscle to handle
        // retarded userAgent strings on Vista)
        var mode = document.documentMode || 0;
        var setExpr = $.browser.msie && (($.browser.version < 8 && !mode) || mode < 8);
        var ie6 = $.browser.msie && /MSIE 6.0/.test(navigator.userAgent) && !mode;

        // global $ methods for blocking/unblocking the entire page
        $.blockUI = function (opts) { install(window, opts); };
        $.unblockUI = function (opts) { remove(window, opts); };

        // convenience method for quick growl-like notifications  (http://www.google.com/search?q=growl)
        $.growlUI = function (title, message, timeout, onClose) {
            var $m = $('<div class="growlUI"></div>');
            if (title) $m.append('<h1>' + title + '</h1>');
            if (message) $m.append('<h2>' + message + '</h2>');
            if (timeout == undefined) timeout = 3000;
            $.blockUI({
                message: $m, fadeIn: 700, fadeOut: 1000, centerY: false,
                timeout: timeout, showOverlay: false,
                onUnblock: onClose,
                css: $.blockUI.defaults.growlCSS
            });
        };

        // plugin method for blocking element content
        $.fn.block = function (opts) {
            return this.unblock({ fadeOut: 0 }).each(function () {
                if ($.css(this, 'position') == 'static')
                    this.style.position = 'relative';
                if ($.browser.msie)
                    this.style.zoom = 1; // force 'hasLayout'
                install(this, opts);
            });
        };

        // plugin method for unblocking element content
        $.fn.unblock = function (opts) {
            return this.each(function () {
                remove(this, opts);
            });
        };

        $.blockUI.version = 2.39; // 2nd generation blocking at no extra cost!

        // override these in your code to change the default behavior and style
        $.blockUI.defaults = {
            // message displayed when blocking (use null for no message)
            message: '<h1>Please wait...</h1>',

            title: null,   // title string; only used when theme == true
            draggable: true,  // only used when theme == true (requires jquery-ui.js to be loaded)

            theme: false, // set to true to use with jQuery UI themes

            // styles for the message when blocking; if you wish to disable
            // these and use an external stylesheet then do this in your code:
            // $.blockUI.defaults.css = {};
            css: {
                padding: 0,
                margin: 0,
                width: '30%',
                top: '40%',
                left: '35%',
                textAlign: 'center',
                color: '#000',
                border: '3px solid #aaa',
                backgroundColor: '#fff',
                cursor: 'wait'
            },

            // minimal style set used when themes are used
            themedCSS: {
                width: '30%',
                top: '40%',
                left: '35%'
            },

            // styles for the overlay
            overlayCSS: {
                backgroundColor: '#000',
                opacity: 0.6,
                cursor: 'wait'
            },

            // styles applied when using $.growlUI
            growlCSS: {
                width: '350px',
                top: '10px',
                left: '',
                right: '10px',
                border: 'none',
                padding: '5px',
                opacity: 0.6,
                cursor: 'default',
                color: '#fff',
                backgroundColor: '#000',
                '-webkit-border-radius': '10px',
                '-moz-border-radius': '10px',
                'border-radius': '10px'
            },

            // IE issues: 'about:blank' fails on HTTPS and javascript:false is s-l-o-w
            // (hat tip to Jorge H. N. de Vasconcelos)
            iframeSrc: /^https/i.test(window.location.href || '') ? 'javascript:false' : 'about:blank',

            // force usage of iframe in non-IE browsers (handy for blocking applets)
            forceIframe: false,

            // z-index for the blocking overlay
            baseZ: 1000,

            // set these to true to have the message automatically centered
            centerX: true, // <-- only effects element blocking (page block controlled via css above)
            centerY: true,

            // allow body element to be stetched in ie6; this makes blocking look better
            // on "short" pages.  disable if you wish to prevent changes to the body height
            allowBodyStretch: true,

            // enable if you want key and mouse events to be disabled for content that is blocked
            bindEvents: true,

            // be default blockUI will supress tab navigation from leaving blocking content
            // (if bindEvents is true)
            constrainTabKey: true,

            // fadeIn time in millis; set to 0 to disable fadeIn on block
            fadeIn: 200,

            // fadeOut time in millis; set to 0 to disable fadeOut on unblock
            fadeOut: 400,

            // time in millis to wait before auto-unblocking; set to 0 to disable auto-unblock
            timeout: 0,

            // disable if you don't want to show the overlay
            showOverlay: true,

            // if true, focus will be placed in the first available input field when
            // page blocking
            focusInput: true,

            // suppresses the use of overlay styles on FF/Linux (due to performance issues with opacity)
            applyPlatformOpacityRules: true,

            // callback method invoked when fadeIn has completed and blocking message is visible
            onBlock: null,

            // callback method invoked when unblocking has completed; the callback is
            // passed the element that has been unblocked (which is the window object for page
            // blocks) and the options that were passed to the unblock call:
            //	 onUnblock(element, options)
            onUnblock: null,

            // don't ask; if you really must know: http://groups.google.com/group/jquery-en/browse_thread/thread/36640a8730503595/2f6a79a77a78e493#2f6a79a77a78e493
            quirksmodeOffsetHack: 4,

            // class name of the message block
            blockMsgClass: 'blockMsg'
        };

        // private data and functions follow...

        var pageBlock = null;
        var pageBlockEls = [];

        function install(el, opts) {
            var full = (el == window);
            var msg = opts && opts.message !== undefined ? opts.message : undefined;
            opts = $.extend({}, $.blockUI.defaults, opts || {});
            opts.overlayCSS = $.extend({}, $.blockUI.defaults.overlayCSS, opts.overlayCSS || {});
            var css = $.extend({}, $.blockUI.defaults.css, opts.css || {});
            var themedCSS = $.extend({}, $.blockUI.defaults.themedCSS, opts.themedCSS || {});
            msg = msg === undefined ? opts.message : msg;

            // remove the current block (if there is one)
            if (full && pageBlock)
                remove(window, { fadeOut: 0 });

            // if an existing element is being used as the blocking content then we capture
            // its current place in the DOM (and current display style) so we can restore
            // it when we unblock
            if (msg && typeof msg != 'string' && (msg.parentNode || msg.jquery)) {
                var node = msg.jquery ? msg[0] : msg;
                var data = {};
                $(el).data('blockUI.history', data);
                data.el = node;
                data.parent = node.parentNode;
                data.display = node.style.display;
                data.position = node.style.position;
                if (data.parent)
                    data.parent.removeChild(node);
            }

            $(el).data('blockUI.onUnblock', opts.onUnblock);
            var z = opts.baseZ;

            // blockUI uses 3 layers for blocking, for simplicity they are all used on every platform;
            // layer1 is the iframe layer which is used to supress bleed through of underlying content
            // layer2 is the overlay layer which has opacity and a wait cursor (by default)
            // layer3 is the message content that is displayed while blocking

            var lyr1 = ($.browser.msie || opts.forceIframe)
		? $('<iframe class="blockUI" style="z-index:' + (z++) + ';display:none;border:none;margin:0;padding:0;position:absolute;width:100%;height:100%;top:0;left:0" src="' + opts.iframeSrc + '"></iframe>')
		: $('<div class="blockUI" style="display:none"></div>');

            var lyr2 = opts.theme
	 	? $('<div class="blockUI blockOverlay ui-widget-overlay" style="z-index:' + (z++) + ';display:none"></div>')
	 	: $('<div class="blockUI blockOverlay" style="z-index:' + (z++) + ';display:none;border:none;margin:0;padding:0;width:100%;height:100%;top:0;left:0"></div>');

            var lyr3, s;
            if (opts.theme && full) {
                s = '<div class="blockUI ' + opts.blockMsgClass + ' blockPage ui-dialog ui-widget ui-corner-all" style="z-index:' + (z + 10) + ';display:none;position:fixed">' +
				'<div class="ui-widget-header ui-dialog-titlebar ui-corner-all blockTitle">' + (opts.title || '&nbsp;') + '</div>' +
				'<div class="ui-widget-content ui-dialog-content"></div>' +
			'</div>';
            }
            else if (opts.theme) {
                s = '<div class="blockUI ' + opts.blockMsgClass + ' blockElement ui-dialog ui-widget ui-corner-all" style="z-index:' + (z + 10) + ';display:none;position:absolute">' +
				'<div class="ui-widget-header ui-dialog-titlebar ui-corner-all blockTitle">' + (opts.title || '&nbsp;') + '</div>' +
				'<div class="ui-widget-content ui-dialog-content"></div>' +
			'</div>';
            }
            else if (full) {
                s = '<div class="blockUI ' + opts.blockMsgClass + ' blockPage" style="z-index:' + (z + 10) + ';display:none;position:fixed"></div>';
            }
            else {
                s = '<div class="blockUI ' + opts.blockMsgClass + ' blockElement" style="z-index:' + (z + 10) + ';display:none;position:absolute"></div>';
            }
            lyr3 = $(s);

            // if we have a message, style it
            if (msg) {
                if (opts.theme) {
                    lyr3.css(themedCSS);
                    lyr3.addClass('ui-widget-content');
                }
                else
                    lyr3.css(css);
            }

            // style the overlay
            if (!opts.theme && (!opts.applyPlatformOpacityRules || !($.browser.mozilla && /Linux/.test(navigator.platform))))
                lyr2.css(opts.overlayCSS);
            lyr2.css('position', full ? 'fixed' : 'absolute');

            // make iframe layer transparent in IE
            if ($.browser.msie || opts.forceIframe)
                lyr1.css('opacity', 0.0);

            //$([lyr1[0],lyr2[0],lyr3[0]]).appendTo(full ? 'body' : el);
            var layers = [lyr1, lyr2, lyr3], $par = full ? $('body') : $(el);
            $.each(layers, function () {
                this.appendTo($par);
            });

            if (opts.theme && opts.draggable && $.fn.draggable) {
                lyr3.draggable({
                    handle: '.ui-dialog-titlebar',
                    cancel: 'li'
                });
            }

            // ie7 must use absolute positioning in quirks mode and to account for activex issues (when scrolling)
            var expr = setExpr && (!$.boxModel || $('object,embed', full ? null : el).length > 0);
            if (ie6 || expr) {
                // give body 100% height
                if (full && opts.allowBodyStretch && $.boxModel)
                    $('html,body').css('height', '100%');

                // fix ie6 issue when blocked element has a border width
                if ((ie6 || !$.boxModel) && !full) {
                    var t = sz(el, 'borderTopWidth'), l = sz(el, 'borderLeftWidth');
                    var fixT = t ? '(0 - ' + t + ')' : 0;
                    var fixL = l ? '(0 - ' + l + ')' : 0;
                }

                // simulate fixed position
                $.each([lyr1, lyr2, lyr3], function (i, o) {
                    var s = o[0].style;
                    s.position = 'absolute';
                    if (i < 2) {
                        full ? s.setExpression('height', 'Math.max(document.body.scrollHeight, document.body.offsetHeight) - (jQuery.boxModel?0:' + opts.quirksmodeOffsetHack + ') + "px"')
					 : s.setExpression('height', 'this.parentNode.offsetHeight + "px"');
                        full ? s.setExpression('width', 'jQuery.boxModel && document.documentElement.clientWidth || document.body.clientWidth + "px"')
					 : s.setExpression('width', 'this.parentNode.offsetWidth + "px"');
                        if (fixL) s.setExpression('left', fixL);
                        if (fixT) s.setExpression('top', fixT);
                    }
                    else if (opts.centerY) {
                        if (full) s.setExpression('top', '(document.documentElement.clientHeight || document.body.clientHeight) / 2 - (this.offsetHeight / 2) + (blah = document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + "px"');
                        s.marginTop = 0;
                    }
                    else if (!opts.centerY && full) {
                        var top = (opts.css && opts.css.top) ? parseInt(opts.css.top) : 0;
                        var expression = '((document.documentElement.scrollTop ? document.documentElement.scrollTop : document.body.scrollTop) + ' + top + ') + "px"';
                        s.setExpression('top', expression);
                    }
                });
            }

            // show the message
            if (msg) {
                if (opts.theme)
                    lyr3.find('.ui-widget-content').append(msg);
                else
                    lyr3.append(msg);
                if (msg.jquery || msg.nodeType)
                    $(msg).show();
            }

            if (($.browser.msie || opts.forceIframe) && opts.showOverlay)
                lyr1.show(); // opacity is zero
            if (opts.fadeIn) {
                var cb = opts.onBlock ? opts.onBlock : noOp;
                var cb1 = (opts.showOverlay && !msg) ? cb : noOp;
                var cb2 = msg ? cb : noOp;
                if (opts.showOverlay)
                    lyr2._fadeIn(opts.fadeIn, cb1);
                if (msg)
                    lyr3._fadeIn(opts.fadeIn, cb2);
            }
            else {
                if (opts.showOverlay)
                    lyr2.show();
                if (msg)
                    lyr3.show();
                if (opts.onBlock)
                    opts.onBlock();
            }

            // bind key and mouse events
            bind(1, el, opts);

            if (full) {
                pageBlock = lyr3[0];
                pageBlockEls = $(':input:enabled:visible', pageBlock);
                if (opts.focusInput)
                    setTimeout(focus, 20);
            }
            else
                center(lyr3[0], opts.centerX, opts.centerY);

            if (opts.timeout) {
                // auto-unblock
                var to = setTimeout(function () {
                    full ? $.unblockUI(opts) : $(el).unblock(opts);
                }, opts.timeout);
                $(el).data('blockUI.timeout', to);
            }
        };

        // remove the block
        function remove(el, opts) {
            var full = (el == window);
            var $el = $(el);
            var data = $el.data('blockUI.history');
            var to = $el.data('blockUI.timeout');
            if (to) {
                clearTimeout(to);
                $el.removeData('blockUI.timeout');
            }
            opts = $.extend({}, $.blockUI.defaults, opts || {});
            bind(0, el, opts); // unbind events

            if (opts.onUnblock === null) {
                opts.onUnblock = $el.data('blockUI.onUnblock');
                $el.removeData('blockUI.onUnblock');
            }

            var els;
            if (full) // crazy selector to handle odd field errors in ie6/7
                els = $('body').children().filter('.blockUI').add('body > .blockUI');
            else
                els = $('.blockUI', el);

            if (full)
                pageBlock = pageBlockEls = null;

            if (opts.fadeOut) {
                els.fadeOut(opts.fadeOut);
                setTimeout(function () { reset(els, data, opts, el); }, opts.fadeOut);
            }
            else
                reset(els, data, opts, el);
        };

        // move blocking element back into the DOM where it started
        function reset(els, data, opts, el) {
            els.each(function (i, o) {
                // remove via DOM calls so we don't lose event handlers
                if (this.parentNode)
                    this.parentNode.removeChild(this);
            });

            if (data && data.el) {
                data.el.style.display = data.display;
                data.el.style.position = data.position;
                if (data.parent)
                    data.parent.appendChild(data.el);
                $(el).removeData('blockUI.history');
            }

            if (typeof opts.onUnblock == 'function')
                opts.onUnblock(el, opts);
        };

        // bind/unbind the handler
        function bind(b, el, opts) {
            var full = el == window, $el = $(el);

            // don't bother unbinding if there is nothing to unbind
            if (!b && (full && !pageBlock || !full && !$el.data('blockUI.isBlocked')))
                return;
            if (!full)
                $el.data('blockUI.isBlocked', b);

            // don't bind events when overlay is not in use or if bindEvents is false
            if (!opts.bindEvents || (b && !opts.showOverlay))
                return;

            // bind anchors and inputs for mouse and key events
            var events = 'mousedown mouseup keydown keypress';
            b ? $(document).bind(events, opts, handler) : $(document).unbind(events, handler);

            // former impl...
            //	   var $e = $('a,:input');
            //	   b ? $e.bind(events, opts, handler) : $e.unbind(events, handler);
        };

        // event handler to suppress keyboard/mouse events when blocking
        function handler(e) {
            // allow tab navigation (conditionally)
            if (e.keyCode && e.keyCode == 9) {
                if (pageBlock && e.data.constrainTabKey) {
                    var els = pageBlockEls;
                    var fwd = !e.shiftKey && e.target === els[els.length - 1];
                    var back = e.shiftKey && e.target === els[0];
                    if (fwd || back) {
                        setTimeout(function () { focus(back) }, 10);
                        return false;
                    }
                }
            }
            var opts = e.data;
            // allow events within the message content
            if ($(e.target).parents('div.' + opts.blockMsgClass).length > 0)
                return true;

            // allow events for content that is not being blocked
            return $(e.target).parents().children().filter('div.blockUI').length == 0;
        };

        function focus(back) {
            if (!pageBlockEls)
                return;
            var e = pageBlockEls[back === true ? pageBlockEls.length - 1 : 0];
            if (e)
                e.focus();
        };

        function center(el, x, y) {
            var p = el.parentNode, s = el.style;
            var l = ((p.offsetWidth - el.offsetWidth) / 2) - sz(p, 'borderLeftWidth');
            var t = ((p.offsetHeight - el.offsetHeight) / 2) - sz(p, 'borderTopWidth');
            if (x) s.left = l > 0 ? (l + 'px') : '0';
            if (y) s.top = t > 0 ? (t + 'px') : '0';
        };

        function sz(el, p) {
            return parseInt($.css(el, p)) || 0;
        };

    })(jQuery);