/*
 * Copyright (c) 2011 TWIMPACT UG (haftungsbeschraenkt). All rights reserved.
 */

(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);