AnsiEscapeCode.java

package vnet.sms.common.shell.springshell.internal.util;

/**
 * ANSI escape codes supported by JLine
 * 
 * @author Andrew Swan
 * @since 1.2.0
 */
public enum AnsiEscapeCode {

	// These int literals are non-public constants in ANSIBuffer.ANSICodes
	BLINK(5), BOLD(1), CONCEALED(8), FG_BLACK(30), FG_BLUE(34), FG_CYAN(36), FG_GREEN(
	        32), FG_MAGENTA(35), FG_RED(31), FG_YELLOW(33), FG_WHITE(37), OFF(0), REVERSE(
	        7), UNDERSCORE(4);

	// Constant for the escape character
	private static final boolean	ANSI_SUPPORTED	= Boolean
	                                                       .getBoolean("roo.console.ansi");
	private static final char	 ESC	           = 27;

	/**
	 * Decorates the given text with the given escape codes (turning them off
	 * afterwards)
	 * 
	 * @param text
	 *            the text to decorate; can be <code>null</code>
	 * @param codes
	 * @return <code>null</code> if <code>null</code> is passed
	 */
	public static String decorate(final String text,
	        final AnsiEscapeCode... codes) {
		if ((text == null) || "".equals(text)) {
			return text;
		}

		final StringBuilder sb = new StringBuilder();
		if (ANSI_SUPPORTED) {
			for (final AnsiEscapeCode code : codes) {
				sb.append(code.code);
			}
		}
		sb.append(text);
		if ((codes != null) && (codes.length > 0) && ANSI_SUPPORTED) {
			sb.append(OFF.code);
		}
		return sb.toString();
	}

	// Fields
	final String	code;

	/**
	 * Constructor
	 * 
	 * @param code
	 *            the numeric ANSI escape code
	 */
	private AnsiEscapeCode(final int code) {
		// Copied from the method ANSIBuffer.ANSICodes#attrib(int)
		this.code = ESC + "[" + code + "m";
	}
}