/*
*	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
    }, o);

    function checkElement(timer, override) {
      var elTxt = jQuery(timer.el).val();

      // Fire if text > options.captureLength AND text != saved txt OR if override AND text > options.captureLength
      if ((elTxt.length > options.captureLength && elTxt.toUpperCase() != timer.text)
			|| (override && elTxt.length > options.captureLength)) {
        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 (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);