/**
 * jquery.readmore
 * 
 * Substring long paragraphs and make expandable with "Read More" link.
 * Paragraph will be split either at exactly 'substr_len' chars or at the next
 * space char after 'substr_len' words (default).
 * 
 * @date 02 Jul 2012
 * @author Jake Trent (original author) http://www.builtbyjake.com
 * @author Mike Wendt http://www.mikewendt.net
 * @version 1.6
 */
(function ($) {
  $.fn.readmore = function (settings) {

    var defaults = {
      substr_len: 500,
      split_word: false,
      ellipses: '…',
      more_link: '<a class="readm-more">Read&nbsp;More</a>',
      more_clzz: 'readm-more',
      ellipse_clzz: 'readm-continue',
      hidden_clzz: 'readm-hidden'
    };

    var opts =  $.extend({}, defaults, settings);

    this.each(function () {
      var $this = $(this);
      if ($this.html().length > opts.substr_len) {
        abridge($this);
        linkage($this);
      }
    });

    function linkage(elem) {
      elem.append(opts.more_link);
      elem.find('.' + opts.more_clzz).click( function () {
        $(this).hide();
        elem.find('.' + opts.ellipse_clzz).hide();
        elem.find('.' + opts.hidden_clzz).animate({'opacity' : 'toggle'},1000);
      });
    }

    function abridge(elem) {
      var txt = elem.html();
      var dots = "<span class='" + opts.ellipse_clzz + "'>" + opts.ellipses + "</span>";
      var shown = txt.substring(0, (opts.split_word ? opts.substr_len : txt.indexOf(' ', opts.substr_len))) + dots;
      var hidden =
        '<span class="' + opts.hidden_clzz + '" style="display:none;">' +
          txt.substring((opts.split_word ? opts.substr_len : txt.indexOf(' ', opts.substr_len)), txt.length) +
        '</span>';
      elem.html(shown + hidden);
    }
    
    return this;
  };
})(jQuery);