/*
 * jQuery blockUI plugin
 * Version 2.20 (19-MAY-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;
    
    var setExpr = (function(){
        if (!$.browser.msie) 
            return false;
        var div = document.createElement('div');
        try {
            div.style.setExpression('width', '0+0');
        } 
        catch (e) {
            return false;
        }
        return true;
    })();
    
    
    // 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 = 2.20; // 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>',
        
        // 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'
        },
        
        // 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 ie6 = $.browser.msie && /MSIE 6.0/.test(navigator.userAgent);
    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 ||
        {});
        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 = 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) 
            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);
        
        // ie7 must use absolute positioning in quirks mode and to account for activex issues (when scrolling)
        var expr = $.browser.msie && ($.browser.version < 8 || !$.boxModel) && (!$.boxModel || $('object,embed', full ? null : el).length > 0);
        if (ie6 || (expr && setExpr)) {
            // 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) {
            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 = full ? $('body').children().filter('.blockUI') : $('.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);