/*!

 * jQuery blockUI plugin

 * Version 2.25 (29-AUG-2009)

 * @requires jQuery v1.2.3 or later

 *

 * Examples at: http://malsup.com/jquery/block/

 * Copyright (c) 2007-2008 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;



// 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);

    });

};

$.fn.center = function () {
    this.css("position","absolute");
    this.css("top", ( $(window).height() - this.height() ) / 2+$(window).scrollTop() + "px");
    this.css("left", ( $(window).width() - this.width() ) / 2+$(window).scrollLeft() + "px");
    return this;
}


$.blockUI.version = 2.25; // 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:  null,

        color:      '#fff',

        backgroundColor: '#000',

        '-webkit-border-radius': '10px',

        '-moz-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 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

};



// 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);

    }



    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 = $('<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;

    if (opts.theme && full) {

        var s = '<div class="blockUI blockMsg blockPage ui-dialog ui-widget ui-corner-all" style="z-index:'+z+';display:none;position:fixed">' +

                    '<div class="ui-widget-header ui-dialog-titlebar blockTitle">'+(opts.title || '&nbsp;')+'</div>' +

                    '<div class="ui-widget-content ui-dialog-content"></div>' +

                '</div>';

        lyr3 = $(s);

    }

    else {

        lyr3 = full ? $('<div class="blockUI blockMsg blockPage" style="z-index:'+z+';display:none;position:fixed"></div>')

                    : $('<div class="blockUI blockMsg blockElement" style="z-index:'+z+';display:none;position:absolute"></div>');

    }                           



    // 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.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);

    

    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) {

        if (opts.showOverlay)

            lyr2._fadeIn(opts.fadeIn);

        if (msg)

            lyr3.fadeIn(opts.fadeIn);

    }

    else {

        if (opts.showOverlay)

            lyr2.show();

        if (msg)

            lyr3.show();

    }



    // 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

    

    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);

        $(data.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;

            }

        }

    }

    // allow events within the message content

    if ($(e.target).parents('div.blockMsg').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);