/*
 *  TypeWatch 2.0 - Original by Denny Ferrassoli / Refactored by Charles Christolini
 *
 *  Examples/Docs: www.dennydotnet.com
 *  
 *  Copyright(c) 2007 Denny Ferrassoli - DennyDotNet.com
 *  Coprright(c) 2008 Charles Christolini - BinaryPie.com
 *  
 *  Dual licensed under the MIT and GPL licenses:
 *  http://www.opensource.org/licenses/mit-license.php
 *  http://www.gnu.org/licenses/gpl.html
*/

(function(jQuery) {
  jQuery.fn.typeWatch = function(o){
    // Options
    var options = jQuery.extend({
      wait : 750,
      callback : function() { },
      highlight : true,
      captureLength : 2,
      submitOnEnter: true
    }, o);
      
    function checkElement(timer, override) {
      var elTxt = jQuery(timer.el).val();
    
      if ( (elTxt.length > options.captureLength || elTxt.length == 0) &&
           (elTxt.toUpperCase() != timer.text || override)) {
        timer.text = elTxt.toUpperCase();
        timer.cb(elTxt);
      }
    };
    
    function watchElement(elem) {      
      // Must be text or textarea
      if (elem.type.toUpperCase() == "TEXT" || elem.nodeName.toUpperCase() == "TEXTAREA") {

        // Allocate timer element
        var timer = {
          timer : null, 
          text : jQuery(elem).val().toUpperCase(),
          cb : options.callback, 
          el : elem, 
          wait : options.wait
        };

        // Set focus action (highlight)
        if (options.highlight) {
          jQuery(elem).focus(
            function() {
              this.select();
            });
        }

        // Key watcher / clear and reset the timer
        var startWatch = function(evt) {
          var timerWait = timer.wait;
          var overrideBool = false;
          
          if (options.submitOnEnter && evt.keyCode == 13 && this.type.toUpperCase() == "TEXT") {
            timerWait = 1;
            overrideBool = true;
          }
          
          var timerCallbackFx = function()
          {
            checkElement(timer, overrideBool)
          }
          
          // Clear timer          
          clearTimeout(timer.timer);
          timer.timer = setTimeout(timerCallbackFx, timerWait);        
                    
        };
        
        jQuery(elem).keydown(startWatch);
      }
    };
    
    // Watch Each Element
    return this.each(function(index){
      watchElement(this);
    });
    
  };

})(jQuery);