www/plugins/seo-dev/javascript/jquery.simplycountable.js

   1 /*
   2 * jQuery Simply Countable plugin
   3 * Provides a character counter for any text input or textarea
   4 *
   5 * @version 0.4.2
   6 * @homepage http://github.com/aaronrussell/jquery-simply-countable/
   7 * @author Aaron Russell (http://www.aaronrussell.co.uk)
   8 *
   9 * Copyright (c) 2009-2010 Aaron Russell (aaron@gc4.co.uk)
  10 * Dual licensed under the MIT (http://www.opensource.org/licenses/mit-license.php)
  11 * and GPL (http://www.opensource.org/licenses/gpl-license.php) licenses.
  12 */
  13
  14 (function($){
  15
  16   $.fn.simplyCountable = function(options){
  17
  18     options = $.extend({
  19       counter: '#counter',
  20       countType: 'characters',
  21       wordSeparator: ' ',
  22       maxCount: 140,
  23       strictMax: false,
  24       countDirection: 'down',
  25       safeClass: 'safe',
  26       overClass: 'over',
  27       thousandSeparator: ',',
  28       onOverCount: function(){},
  29       onSafeCount: function(){},
  30       onMaxCount: function(){}
  31     }, options);
  32
  33     var countable = this;
  34     var counter = $(options.counter);
  35     if (!counter.length) { return false; }
  36     regex = new RegExp('['+options.wordSeparator+']+');
  37
  38     var countCheck = function(){
  39
  40       var count;
  41       var revCount;
  42
  43       var reverseCount = function(ct){
  44         return ct - (ct*2) + options.maxCount;
  45       }
  46
  47       var countInt = function(){
  48         return (options.countDirection === 'up') ? revCount : count;
  49       }
  50
  51       var numberFormat = function(ct){
  52         var prefix = '';
  53         if (options.thousandSeparator){
  54           ct = ct.toString();
  55           // Handle large negative numbers
  56           if (ct.match(/^-/)) {
  57             ct = ct.substr(1);
  58             prefix = '-';
  59           }
  60           for (var i = ct.length-3; i > 0; i -= 3){
  61             ct = ct.substr(0,i) + options.thousandSeparator + ct.substr(i);
  62           }
  63         }
  64         return prefix + ct;
  65       }
  66
  67       /* Calculates count for either words or characters */
  68       if (options.countType === 'words'){
  69         count = options.maxCount - $.trim(countable.val()).split(regex).length;
  70         if (countable.val() === ''){ count += 1; }
  71       }
  72       else { count = options.maxCount - countable.val().length; }
  73       revCount = reverseCount(count);
  74
  75       /* If strictMax set restrict further characters */
  76       if (options.strictMax && count <= 0){
  77         var content = countable.val();
  78         if (count < 0 || content.match(new RegExp('['+options.wordSeparator+']$'))) {
  79           options.onMaxCount(countInt(), countable, counter);
  80         }
  81         if (options.countType === 'words'){
  82           countable.val(content.split(regex).slice(0, options.maxCount).join(options.wordSeparator));
  83         }
  84         else { countable.val(content.substring(0, options.maxCount)); }
  85         count = 0, revCount = options.maxCount;
  86       }
  87
  88       counter.text(numberFormat(countInt()));
  89
  90       /* Set CSS class rules and API callbacks */
  91       if (!counter.hasClass(options.safeClass) && !counter.hasClass(options.overClass)){
  92         if (count < 0){ counter.addClass(options.overClass); }
  93         else { counter.addClass(options.safeClass); }
  94       }
  95       else if (count < 0 && counter.hasClass(options.safeClass)){
  96         counter.removeClass(options.safeClass).addClass(options.overClass);
  97         options.onOverCount(countInt(), countable, counter);
  98       }
  99       else if (count >= 0 && counter.hasClass(options.overClass)){
 100         counter.removeClass(options.overClass).addClass(options.safeClass);
 101         options.onSafeCount(countInt(), countable, counter);
 102       }
 103
 104     };
 105
 106     countCheck();
 107     countable.keyup(countCheck);
 108     countable.bind('paste', function(){
 109       // Wait a few miliseconds for the pasting
 110       setTimeout(countCheck, 5);
 111     });
 112
 113   };
 114
 115 })(jQuery);