/*!
 * jQuery blockUI plugin
 * Version 2.31 (06-JAN-2010)
 * @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 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 = 2.31; // 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'
   },
   
   // 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
};

// 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);
   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
   
   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;
         }
      }
   }
   // 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);