guipn/excellent.htm

## excellent.htm
<html>
    <head>
        <title>Excellent</title>
        <style type="text/css">
            body {
                text-align: center;
            }
        </style>
    </head>
    <body>
        <h1>Excellent</h1>
        (abrir no Google Chrome!)
        <p/>
        <textarea id="input" cols="100" rows="30">
SE(C2=G2;I2-D2;SE(C2=G3;I3-D2;se(c2=g4;l4-d2;se(C2=G5;L5-D2;SE(C2=G6;L6-D2;SE(C2
=G7;L7-D2;SE(C2=G8;L8-D2;SE(C2=G9;L9-D2;SE(C2=G10;L10-D2;SE(C2=G11;L11-D2;SE(C2=
G12;L12-D2;SE(C2=G13;L13-D2;SE(C2=G14;L14-D2)))))))))))))</textarea>
        <p/>
        <input type="button" id="go" value="Indentar"/>
        <input type="button" id="reset" value="Apagar"/>

        <script src="excellent.js"></script>
        <script>
            function get(id) {
                return document.getElementById(id);
            }

            get('go').addEventListener('click', function () {
                get('input').value = parser().parse(get('input').value);
            })

            get('reset').addEventListener('click', function () {
                get('input').value = '';
            });
        </script>
    </body>
</html>

## excellent.js
function parser(separator, line, tab) {

    separator = separator || ';';
    line      = line      || '\n';
    tab       = tab       || '    ';

    function peek(str, n) {
        return str.substring(0, n || 1);
    }

    function next(str, n) {
        return str.slice(n || 1);
    }

    function indent(str, indentation) {
        return indentation + str;
    }

    function unindent(str, indentation) {
        return str.replace(indentation, '');
    }


    function parse(formula, indentation) {

        var newline = line + (indentation = indentation || '');

        if (formula === '') {
            return '';
        }

        if (peek(formula) === '(') {
            return peek(formula) +
                   newline       +
                   indent(parse(next(formula), indent(indentation, tab)), tab);
        }

        if (peek(formula) === ')') {
            indentation = unindent(indentation, tab);
            return line        +
                   indentation +
                   ')'         +
                   parse(next(formula), indentation);
        }

        if (peek(formula) === separator) {
            return peek(formula) +
                   newline       +
                   parse(next(formula), indentation);
        }

        return peek(formula) +
               parse(next(formula), indentation);
    }

    function prettify(mess) {
        return mess.replace(/(<=|>=|!=|<>|[*=+\-\/><^])/g, ' $1 ');
    }

    function removeNoise(str) {
        return str.replace(/\n/g, '');
    }

    return {
        parse: function (excelFormula) {
                   return prettify(parse(removeNoise(excelFormula)));
               }
    };

}
	<html>
	<head>
	<title>Excellent</title>
	<style type="text/css">
	body {
	text-align: center;
	}
	</style>
	</head>
	<body>
	<h1>Excellent</h1>
	(abrir no Google Chrome!)
	<p/>
	<textarea id="input" cols="100" rows="30">
	SE(C2=G2;I2-D2;SE(C2=G3;I3-D2;se(c2=g4;l4-d2;se(C2=G5;L5-D2;SE(C2=G6;L6-D2;SE(C2
	=G7;L7-D2;SE(C2=G8;L8-D2;SE(C2=G9;L9-D2;SE(C2=G10;L10-D2;SE(C2=G11;L11-D2;SE(C2=
	G12;L12-D2;SE(C2=G13;L13-D2;SE(C2=G14;L14-D2)))))))))))))</textarea>
	<p/>
	<input type="button" id="go" value="Indentar"/>
	<input type="button" id="reset" value="Apagar"/>

	<script src="excellent.js"></script>
	<script>
	function get(id) {
	return document.getElementById(id);
	}

	get('go').addEventListener('click', function () {
	get('input').value = parser().parse(get('input').value);
	})

	get('reset').addEventListener('click', function () {
	get('input').value = '';
	});
	</script>
	</body>
	</html>
	function parser(separator, line, tab) {

	separator = separator \|\| ';';
	line = line \|\| '\n';
	tab = tab \|\| ' ';

	function peek(str, n) {
	return str.substring(0, n \|\| 1);
	}

	function next(str, n) {
	return str.slice(n \|\| 1);
	}

	function indent(str, indentation) {
	return indentation + str;
	}

	function unindent(str, indentation) {
	return str.replace(indentation, '');
	}


	function parse(formula, indentation) {

	var newline = line + (indentation = indentation \|\| '');

	if (formula === '') {
	return '';
	}

	if (peek(formula) === '(') {
	return peek(formula) +
	newline +
	indent(parse(next(formula), indent(indentation, tab)), tab);
	}

	if (peek(formula) === ')') {
	indentation = unindent(indentation, tab);
	return line +
	indentation +
	')' +
	parse(next(formula), indentation);
	}

	if (peek(formula) === separator) {
	return peek(formula) +
	newline +
	parse(next(formula), indentation);
	}

	return peek(formula) +
	parse(next(formula), indentation);
	}

	function prettify(mess) {
	return mess.replace(/(<=\|>=\|!=\|<>\|[*=+\-\/><^])/g, ' $1 ');
	}

	function removeNoise(str) {
	return str.replace(/\n/g, '');
	}

	return {
	parse: function (excelFormula) {
	return prettify(parse(removeNoise(excelFormula)));
	}
	};

	}