/** the CSS value for a horizontal alignment of an object */	public static final String CSS_VALUE_TEXTALIGNRIGHT = "right";	/** the CSS value for a horizontal alignment of an object */	public static final String CSS_VALUE_TEXTALIGNCENTER = "center";	/** the CSS value for a horizontal alignment of an object */	public static final String CSS_VALUE_TEXTALIGNJUSTIFY = "justify";	/** a CSS value for text decoration */	public static final String CSS_VALUE_UNDERLINE = "underline";	/** a default value for font-size      * @since 2.1.3     */	public static final float DEFAULT_FONT_SIZE = 12f;	/**	 * Parses a length.	 * 	 * @param string	 *            a length in the form of an optional + or -, followed by a	 *            number and a unit.	 * @return a float	 */	public static float parseLength(String string) {		// TODO: Evaluate the effect of this.		// It may change the default behavour of the methd if this is changed.		// return parseLength(string, Markup.DEFAULT_FONT_SIZE);		int pos = 0;		int length = string.length();		boolean ok = true;		while (ok && pos < length) {			switch (string.charAt(pos)) {			case '+':			case '-':			case '0':			case '1':			case '2':			case '3':			case '4':			case '5':			case '6':			case '7':			case '8':			case '9':			case '.':				pos++;				break;			default:				ok = false;			}		}		if (pos == 0)			return 0f;		if (pos == length)			return Float.parseFloat(string + "f");		float f = Float.parseFloat(string.substring(0, pos) + "f");		string = string.substring(pos);		// inches		if (string.startsWith("in")) {			return f * 72f;		}		// centimeters		if (string.startsWith("cm")) {			return (f / 2.54f) * 72f;		}		// millimeters		if (string.startsWith("mm")) {			return (f / 25.4f) * 72f;		}		// picas		if (string.startsWith("pc")) {			return f * 12f;		}		// default: we assume the length was measured in points		return f;	}	/**	 * New method contributed by: Lubos Strapko	 * 	 * @since 2.1.3	 */	public static float parseLength(String string, float actualFontSize) {		if (string == null)			return 0f;		int pos = 0;		int length = string.length();		boolean ok = true;		while (ok && pos < length) {			switch (string.charAt(pos)) {			case '+':			case '-':			case '0':			case '1':			case '2':			case '3':			case '4':			case '5':			case '6':			case '7':			case '8':			case '9':			case '.':				pos++;				break;			default:				ok = false;			}		}		if (pos == 0)			return 0f;		if (pos == length)			return Float.parseFloat(string + "f");		float f = Float.parseFloat(string.substring(0, pos) + "f");		string = string.substring(pos);		// inches		if (string.startsWith("in")) {			return f * 72f;		}		// centimeters		if (string.startsWith("cm")) {			return (f / 2.54f) * 72f;		}		// millimeters		if (string.startsWith("mm")) {			return (f / 25.4f) * 72f;		}		// picas		if (string.startsWith("pc")) {			return f * 12f;		}		// 1em is equal to the current font size		if (string.startsWith("em")) {			return f * actualFontSize;		}		// one ex is the x-height of a font (x-height is usually about half the		// font-size)		if (string.startsWith("ex")) {			return f * actualFontSize / 2;		}		// default: we assume the length was measured in points		return f;	}	/**	 * Converts a <CODE>Color</CODE> into a HTML representation of this <CODE>	 * Color</CODE>.	 * 	 * @param s	 *            the <CODE>Color</CODE> that has to be converted.	 * @return the HTML representation of this <COLOR>Color </COLOR>	 */	public static Color decodeColor(String s) {		if (s == null)			return null;		s = s.toLowerCase().trim();		Color c = WebColors.getRGBColor(s);		if (c != null)			return c;		try {			if (s.startsWith("#")) {				if (s.length() == 4)					s = "#" + s.substring(1, 2) + s.substring(1, 2)							+ s.substring(2, 3) + s.substring(2, 3)							+ s.substring(3, 4) + s.substring(3, 4);				if (s.length() == 7)					return new Color(Integer.parseInt(s.substring(1), 16));			} else if (s.startsWith("rgb")) {				StringTokenizer tk = new StringTokenizer(s.substring(3),						" \t\r\n\f(),");				int[] cc = new int[3];				for (int k = 0; k < 3; ++k) {					if (!tk.hasMoreTokens())						return null;					String t = tk.nextToken();					float n;					if (t.endsWith("%")) {						n = Float.parseFloat(t.substring(0, t.length() - 1));						n = n * 255f / 100f;					} else						n = Float.parseFloat(t);					int ni = (int) n;					if (ni > 255)						ni = 255;					else if (ni < 0)						ni = 0;					cc[k] = ni;				}				return new Color(cc[0], cc[1], cc[2]);			}		} catch (Exception e) {		}		return null;	}	/**	 * This method parses a String with attributes and returns a Properties	 * object.	 * 	 * @param string	 *            a String of this form: 'key1="value1"; key2="value2";...	 *            keyN="valueN" '	 * @return a Properties object	 */	public static Properties parseAttributes(String string) {		Properties result = new Properties();		if (string == null)			return result;		StringTokenizer keyValuePairs = new StringTokenizer(string, ";");		StringTokenizer keyValuePair;		String key;		String value;		while (keyValuePairs.hasMoreTokens()) {			keyValuePair = new StringTokenizer(keyValuePairs.nextToken(), ":");			if (keyValuePair.hasMoreTokens())				key = keyValuePair.nextToken().trim();			else				continue;			if (keyValuePair.hasMoreTokens())				value = keyValuePair.nextToken().trim();			else				continue;			if (value.startsWith("\""))				value = value.substring(1);			if (value.endsWith("\""))				value = value.substring(0, value.length() - 1);			result.setProperty(key.toLowerCase(), value);		}		return result;	}	/**	 * Removes the comments sections of a String.	 * 	 * @param string	 *            the original String	 * @param startComment	 *            the String that marks the start of a Comment section	 * @param endComment	 *            the String that marks the end of a Comment section.	 * @return the String stripped of its comment section	 */	public static String removeComment(String string, String startComment,			String endComment) {		StringBuffer result = new StringBuffer();		int pos = 0;		int end = endComment.length();		int start = string.indexOf(startComment, pos);		while (start > -1) {			result.append(string.substring(pos, start));			pos = string.indexOf(endComment, start) + end;			start = string.indexOf(startComment, pos);		}		result.append(string.substring(pos));		return result.toString();	}}