Bug 572938 Terminal: add support for reverse linefeed

Scroll up is not working with `less`, `man`, probably
other programs.

Change-Id: I99d2472ab09df6b79fffbcaa581f3024c44d3ead
Signed-off-by: Fabrizio Iannetti <[email protected]>

Author: fabrizioiannetti

terminal/plugins/org.eclipse.tm.terminal.control/src/org/eclipse/tm/internal/terminal/emulator/VT100Emulator.java

@@ -395,6 +395,14 @@ private void processNewText() throws IOException {
 					resetTerminal();
 					break;
 
+				case 'M':
+					// Reverse line feed
+					ansiState = ANSISTATE_INITIAL;
+					if (text.getCursorLine() == 0)
+						text.scrollDown(1);
+					moveCursorUp(1);
+					break;
+
 				default:
 					Logger.log("Unsupported escape sequence: escape '" + character + "'"); //$NON-NLS-1$ //$NON-NLS-2$
 					ansiState = ANSISTATE_INITIAL;