/*!
 * jQuery UI 1.8.1
 *
 * Copyright (c) 2010 AUTHORS.txt (http://jqueryui.com/about)
 * Dual licensed under the MIT (MIT-LICENSE.txt)
 * and GPL (GPL-LICENSE.txt) licenses.
 *
 * http://docs.jquery.com/UI
 */
;jQuery.ui || (function($) {

//Helper functions and ui object
$.ui = {
  version: "1.8.1",

  // $.ui.plugin is deprecated.  Use the proxy pattern instead.
  plugin: {
    add: function(module, option, set) {
      var proto = $.ui[module].prototype;
      for(var i in set) {
        proto.plugins[i] = proto.plugins[i] || [];
        proto.plugins[i].push([option, set[i]]);
      }
    },
    call: function(instance, name, args) {
      var set = instance.plugins[name];
      if(!set || !instance.element[0].parentNode) { return; }

      for (var i = 0; i < set.length; i++) {
        if (instance.options[set[i][0]]) {
          set[i][1].apply(instance.element, args);
        }
      }
    }
  },

  contains: function(a, b) {
    return document.compareDocumentPosition
      ? a.compareDocumentPosition(b) & 16
      : a !== b && a.contains(b);
  },

  hasScroll: function(el, a) {

    //If overflow is hidden, the element might have extra content, but the user wants to hide it
    if ($(el).css('overflow') == 'hidden') { return false; }

    var scroll = (a && a == 'left') ? 'scrollLeft' : 'scrollTop',
      has = false;

    if (el[scroll] > 0) { return true; }

    // TODO: determine which cases actually cause this to happen
    // if the element doesn't have the scroll set, see if it's possible to
    // set the scroll
    el[scroll] = 1;
    has = (el[scroll] > 0);
    el[scroll] = 0;
    return has;
  },

  isOverAxis: function(x, reference, size) {
    //Determines when x coordinate is over "b" element axis
    return (x > reference) && (x < (reference + size));
  },

  isOver: function(y, x, top, left, height, width) {
    //Determines when x, y coordinates is over "b" element
    return $.ui.isOverAxis(y, top, height) && $.ui.isOverAxis(x, left, width);
  },

  keyCode: {
    ALT: 18,
    BACKSPACE: 8,
    CAPS_LOCK: 20,
    COMMA: 188,
    CONTROL: 17,
    DELETE: 46,
    DOWN: 40,
    END: 35,
    ENTER: 13,
    ESCAPE: 27,
    HOME: 36,
    INSERT: 45,
    LEFT: 37,
    NUMPAD_ADD: 107,
    NUMPAD_DECIMAL: 110,
    NUMPAD_DIVIDE: 111,
    NUMPAD_ENTER: 108,
    NUMPAD_MULTIPLY: 106,
    NUMPAD_SUBTRACT: 109,
    PAGE_DOWN: 34,
    PAGE_UP: 33,
    PERIOD: 190,
    RIGHT: 39,
    SHIFT: 16,
    SPACE: 32,
    TAB: 9,
    UP: 38
  }
};

//jQuery plugins
$.fn.extend({
  _focus: $.fn.focus,
  focus: function(delay, fn) {
    return typeof delay === 'number'
      ? this.each(function() {
        var elem = this;
        setTimeout(function() {
          $(elem).focus();
          (fn && fn.call(elem));
        }, delay);
      })
      : this._focus.apply(this, arguments);
  },
  
  enableSelection: function() {
    return this
      .attr('unselectable', 'off')
      .css('MozUserSelect', '');
  },

  disableSelection: function() {
    return this
      .attr('unselectable', 'on')
      .css('MozUserSelect', 'none');
  },

  scrollParent: function() {
    var scrollParent;
    if(($.browser.msie && (/(static|relative)/).test(this.css('position'))) || (/absolute/).test(this.css('position'))) {
      scrollParent = this.parents().filter(function() {
        return (/(relative|absolute|fixed)/).test($.curCSS(this,'position',1)) && (/(auto|scroll)/).test($.curCSS(this,'overflow',1)+$.curCSS(this,'overflow-y',1)+$.curCSS(this,'overflow-x',1));
      }).eq(0);
    } else {
      scrollParent = this.parents().filter(function() {
        return (/(auto|scroll)/).test($.curCSS(this,'overflow',1)+$.curCSS(this,'overflow-y',1)+$.curCSS(this,'overflow-x',1));
      }).eq(0);
    }

    return (/fixed/).test(this.css('position')) || !scrollParent.length ? $(document) : scrollParent;
  },

  zIndex: function(zIndex) {
    if (zIndex !== undefined) {
      return this.css('zIndex', zIndex);
    }
    
    if (this.length) {
      var elem = $(this[0]), position, value;
      while (elem.length && elem[0] !== document) {
        // Ignore z-index if position is set to a value where z-index is ignored by the browser
        // This makes behavior of this function consistent across browsers
        // WebKit always returns auto if the element is positioned
        position = elem.css('position');
        if (position == 'absolute' || position == 'relative' || position == 'fixed')
        {
          // IE returns 0 when zIndex is not specified
          // other browsers return a string
          // we ignore the case of nested elements with an explicit value of 0
          // <div style="z-index: -10;"><div style="z-index: 0;"></div></div>
          value = parseInt(elem.css('zIndex'));
          if (!isNaN(value) && value != 0) {
            return value;
          }
        }
        elem = elem.parent();
      }
    }

    return 0;
  }
});


//Additional selectors
$.extend($.expr[':'], {
  data: function(elem, i, match) {
    return !!$.data(elem, match[3]);
  },

  focusable: function(element) {
    var nodeName = element.nodeName.toLowerCase(),
      tabIndex = $.attr(element, 'tabindex');
    return (/input|select|textarea|button|object/.test(nodeName)
      ? !element.disabled
      : 'a' == nodeName || 'area' == nodeName
        ? element.href || !isNaN(tabIndex)
        : !isNaN(tabIndex))
      // the element and all of its ancestors must be visible
      // the browser may report that the area is hidden
      && !$(element)['area' == nodeName ? 'parents' : 'closest'](':hidden').length;
  },

  tabbable: function(element) {
    var tabIndex = $.attr(element, 'tabindex');
    return (isNaN(tabIndex) || tabIndex >= 0) && $(element).is(':focusable');
  }
});

})(jQuery);