/*!
 * jQuery UI Stars v3.0.1
 * http://plugins.jquery.com/project/Star_Rating_widget
 *
 * Copyright (c) 2010 Marek "Orkan" Zajac (orkans@gmail.com)
 * Dual licensed under the MIT and GPL licenses.
 * http://docs.jquery.com/License
 *
 * $Rev: 164 $
 * $Date:: 2010-05-01 #$
 * $Build: 35 (2010-05-01)
 *
 * Depends:
 *  jquery.ui.core.js
 *  jquery.ui.widget.js
 *
 */
(function($) {

$.widget('ui.stars', {
  options: {
    inputType: 'radio', // [radio|select]
    split: 0, // decrease number of stars by splitting each star into pieces [2|3|4|...]
    disabled: false, // set to [true] to make the stars initially disabled
    cancelTitle: 'Cancel Rating',
    cancelValue: 0, // default value of Cancel btn.
    cancelShow: true,
    disableValue: true, // set to [false] to not disable the hidden input when Cancel btn is clicked, so the value will present in POST data.
    oneVoteOnly: false,
    showTitles: false,
    captionEl: null, // jQuery object - target for text captions 
    callback: null, // function(ui, type, value, event)

    /*
     * CSS classes
     */
    starWidth: 16, // width of the star image
    cancelClass: 'ui-stars-cancel',
    starClass: 'ui-stars-star',
    starOnClass: 'ui-stars-star-on',
    starHoverClass: 'ui-stars-star-hover',
    starDisabledClass: 'ui-stars-star-disabled',
    cancelHoverClass: 'ui-stars-cancel-hover',
    cancelDisabledClass: 'ui-stars-cancel-disabled'
  },
  
  _create: function() {
    var self = this, o = this.options, starId = 0;
    this.element.data('former.stars', this.element.html());

    o.isSelect = o.inputType == 'select';
    this.$form = $(this.element).closest('form');
    this.$selec = o.isSelect ? $('select', this.element)  : null;
    this.$rboxs = o.isSelect ? $('option', this.$selec)   : $(':radio', this.element);

    /*
     * Map all inputs from $rboxs array to Stars elements
     */
    this.$stars = this.$rboxs.map(function(i)
    {
      var el = {
        value:      this.value,
        title:      (o.isSelect ? this.text : this.title) || this.value,
        isDefault:  (o.isSelect && this.defaultSelected) || this.defaultChecked
      };

      if(i==0) {
        o.split = typeof o.split != 'number' ? 0 : o.split;
        o.val2id = [];
        o.id2val = [];
        o.id2title = [];
        o.name = o.isSelect ? self.$selec.get(0).name : this.name;
        o.disabled = o.disabled || (o.isSelect ? $(self.$selec).attr('disabled') : $(this).attr('disabled'));
      }

      /*
       * Consider it as a Cancel button?
       */
      if(el.value == o.cancelValue) {
        o.cancelTitle = el.title;
        return null;
      }

      o.val2id[el.value] = starId;
      o.id2val[starId] = el.value;
      o.id2title[starId] = el.title;

      if(el.isDefault) {
        o.checked = starId;
        o.value = o.defaultValue = el.value;
        o.title = el.title;
      }

      var $s = $('<div/>').addClass(o.starClass);
      var $a = $('<a/>').attr('title', o.showTitles ? el.title : '').text(el.value);

      /*
       * Prepare division settings
       */
      if(o.split) {
        var oddeven = (starId % o.split);
        var stwidth = Math.floor(o.starWidth / o.split);
        $s.width(stwidth);
        $a.css('margin-left', '-' + (oddeven * stwidth) + 'px');
      }

      starId++;
      return $s.append($a).get(0);
    });

    /*
     * How many Stars?
     */
    o.items = starId;

    /*
     * Remove old content
     */
    o.isSelect ? this.$selec.remove() : this.$rboxs.remove();

    /*
     * Append Stars interface
     */
    this.$cancel = $('<div/>').addClass(o.cancelClass).append( $('<a/>').attr('title', o.showTitles ? o.cancelTitle : '').text(o.cancelValue) );
    o.cancelShow &= !o.disabled && !o.oneVoteOnly;
    o.cancelShow && this.element.append(this.$cancel);
    this.element.append(this.$stars);

    /*
     * Initial selection
     */
    if(o.checked === undefined) {
      o.checked = -1;
      o.value = o.defaultValue = o.cancelValue;
      o.title = '';
    }
    
    /*
     * The only FORM element, that has been linked to the stars control. The value field is updated on each Star click event
     */
    this.$value = $("<input type='hidden' name='"+o.name+"' value='"+o.value+"' />");
    this.element.append(this.$value);


    /*
     * Attach stars event handler
     */
    this.$stars.bind('click.stars', function(e) {
      if(!o.forceSelect && o.disabled) return false;

      var i = self.$stars.index(this);
      o.checked = i;
      o.value = o.id2val[i];
      o.title = o.id2title[i];
      self.$value.attr({disabled: o.disabled ? 'disabled' : '', value: o.value});

      fillTo(i, false);
      self._disableCancel();

      !o.forceSelect && self.callback(e, 'star');
    })
    .bind('mouseover.stars', function() {
      if(o.disabled) return false;
      var i = self.$stars.index(this);
      fillTo(i, true);
    })
    .bind('mouseout.stars', function() {
      if(o.disabled) return false;
      fillTo(self.options.checked, false);
    });


    /*
     * Attach cancel event handler
     */
    this.$cancel.bind('click.stars', function(e) {
      if(!o.forceSelect && (o.disabled || o.value == o.cancelValue)) return false;

      o.checked = -1;
      o.value = o.cancelValue;
      o.title = '';
      
      self.$value.val(o.value);
      o.disableValue && self.$value.attr({disabled: 'disabled'});

      fillNone();
      self._disableCancel();

      !o.forceSelect && self.callback(e, 'cancel');
    })
    .bind('mouseover.stars', function() {
      if(self._disableCancel()) return false;
      self.$cancel.addClass(o.cancelHoverClass);
      fillNone();
      self._showCap(o.cancelTitle);
    })
    .bind('mouseout.stars', function() {
      if(self._disableCancel()) return false;
      self.$cancel.removeClass(o.cancelHoverClass);
      self.$stars.triggerHandler('mouseout.stars');
    });


    /*
     * Attach onReset event handler to the parent FORM
     */
    this.$form.bind('reset.stars', function(){
      !o.disabled && self.select(o.defaultValue);
    });


    /*
     * Clean up to avoid memory leaks in certain versions of IE 6
     */
    $(window).unload(function(){
      self.$cancel.unbind('.stars');
      self.$stars.unbind('.stars');
      self.$form.unbind('.stars');
      self.$selec = self.$rboxs = self.$stars = self.$value = self.$cancel = self.$form = null;
    });


    /*
     * Star selection helpers
     */
    function fillTo(index, hover) {
      if(index != -1) {
        var addClass = hover ? o.starHoverClass : o.starOnClass;
        var remClass = hover ? o.starOnClass    : o.starHoverClass;
        self.$stars.eq(index).prevAll('.' + o.starClass).andSelf().removeClass(remClass).addClass(addClass);
        self.$stars.eq(index).nextAll('.' + o.starClass).removeClass(o.starHoverClass + ' ' + o.starOnClass);
        self._showCap(o.id2title[index]);
      }
      else fillNone();
    };
    function fillNone() {
      self.$stars.removeClass(o.starOnClass + ' ' + o.starHoverClass);
      self._showCap('');
    };


    /*
     * Finally, set up the Stars
     */
    this.select(o.value);
    o.disabled && this.disable();

  },

  /*
   * Private functions
   */
  _disableCancel: function() {
    var o = this.options, disabled = o.disabled || o.oneVoteOnly || (o.value == o.cancelValue);
    if(disabled)  this.$cancel.removeClass(o.cancelHoverClass).addClass(o.cancelDisabledClass);
    else          this.$cancel.removeClass(o.cancelDisabledClass);
    this.$cancel.css('opacity', disabled ? 0.5 : 1);
    return disabled;
  },
  _disableAll: function() {
    var o = this.options;
    this._disableCancel();
    if(o.disabled)  this.$stars.filter('div').addClass(o.starDisabledClass);
    else            this.$stars.filter('div').removeClass(o.starDisabledClass);
  },
  _showCap: function(s) {
    var o = this.options;
    if(o.captionEl) o.captionEl.text(s);
  },

  /*
   * Public functions
   */
  value: function() {
    return this.options.value;
  },
  select: function(val) {
    var o = this.options, e = (val == o.cancelValue) ? this.$cancel : this.$stars.eq(o.val2id[val]);
    o.forceSelect = true;
    e.triggerHandler('click.stars');
    o.forceSelect = false;
  },
  selectID: function(id) {
    var o = this.options, e = (id == -1) ? this.$cancel : this.$stars.eq(id);
    o.forceSelect = true;
    e.triggerHandler('click.stars');
    o.forceSelect = false;
  },
  enable: function() {
    this.options.disabled = false;
    this._disableAll();
  },
  disable: function() {
    this.options.disabled = true;
    this._disableAll();
  },
  destroy: function() {
    this.$form.unbind('.stars');
    this.$cancel.unbind('.stars').remove();
    this.$stars.unbind('.stars').remove();
    this.$value.remove();
    this.element.unbind('.stars').html(this.element.data('former.stars')).removeData('stars');
    return this;
  },
  callback: function(e, type) {
    var o = this.options;
    o.callback && o.callback(this, type, o.value, e);
    o.oneVoteOnly && !o.disabled && this.disable();
  }
});

$.extend($.ui.stars, {
  version: '3.0.1'
});

})(jQuery);