/* Copyright 2010, Sedo Technologies, LLC (www.sedotech.com)
* Licensed under the same license as jQuery itself.
* Dual licensed under the MIT or GPL Version 2 licenses.
* http://jquery.org/license
*/
(function ($) {
    var hintClassName = 'inputWithTextHint';

    $.fn.addHint = function (hint) {
        var filteredSet = this.filter('input:text, textarea');
        filteredSet.each(function () {
            // In here 'this' refers to an individual element
            doAddHint($(this), hint);
        });

        // Find all forms and update the pre post to remove the hint
        $('form input:submit').click(function () {
            $('input:text, textarea').each(function () {
                if ($(this).hasClass(hintClassName) && $(this).attr('hint')
                && $(this).val() == $(this).attr('hint')) {
                    $(this).val('');
                }
            });
        });
    }

    function doAddHint(target, hint) {
        // Only add hint if the target is empty
        if (target.val() == '') {
            addHintToInput(target, hint);

            target.focus(function () {
                // If the target has the hint class on it then a hint must be showing
                //  when hint is showing put cursor at the begining
                if ($(this).hasClass(hintClassName)) {
                    // remove the hint
                    $(this).val('');
                    // remove class
                    $(this).removeClass(hintClassName);
                }
            });

            target.blur(function () {
                // If no text then add hint class back
                if ($(this).val() == '') {
                    addHintToInput(target, hint);
                }
            });
        }
    }

    function addHintToInput(target, hint) {
        target.val(hint);
        target.addClass(hintClassName);
        // add attribute to the target to store hint
        target.attr('hint', hint);
    }
}
)(jQuery);