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   1  /*!
   2   * jQuery UI Effects Pulsate 1.9.2
   3   * http://jqueryui.com
   4   *
   5   * Copyright 2012 jQuery Foundation and other contributors
   6   * Released under the MIT license.
   7   * http://jquery.org/license
   8   *
   9   * http://api.jqueryui.com/pulsate-effect/
  10   *
  11   * Depends:
  12   *    jquery.ui.effect.js
  13   */
  14  (function( $, undefined ) {
  15  
  16  $.effects.effect.pulsate = function( o, done ) {
  17      var elem = $( this ),
  18          mode = $.effects.setMode( elem, o.mode || "show" ),
  19          show = mode === "show",
  20          hide = mode === "hide",
  21          showhide = ( show || mode === "hide" ),
  22  
  23          // showing or hiding leaves of the "last" animation
  24          anims = ( ( o.times || 5 ) * 2 ) + ( showhide ? 1 : 0 ),
  25          duration = o.duration / anims,
  26          animateTo = 0,
  27          queue = elem.queue(),
  28          queuelen = queue.length,
  29          i;
  30  
  31      if ( show || !elem.is(":visible")) {
  32          elem.css( "opacity", 0 ).show();
  33          animateTo = 1;
  34      }
  35  
  36      // anims - 1 opacity "toggles"
  37      for ( i = 1; i < anims; i++ ) {
  38          elem.animate({
  39              opacity: animateTo
  40          }, duration, o.easing );
  41          animateTo = 1 - animateTo;
  42      }
  43  
  44      elem.animate({
  45          opacity: animateTo
  46      }, duration, o.easing);
  47  
  48      elem.queue(function() {
  49          if ( hide ) {
  50              elem.hide();
  51          }
  52          done();
  53      });
  54  
  55      // We just queued up "anims" animations, we need to put them next in the queue
  56      if ( queuelen > 1 ) {
  57          queue.splice.apply( queue,
  58              [ 1, 0 ].concat( queue.splice( queuelen, anims + 1 ) ) );
  59      }
  60      elem.dequeue();
  61  };
  62  
  63  })(jQuery);