/*
* RapidMiner
*
* Copyright (C) 2001-2008 by Rapid-I and the contributors
*
* Complete list of developers available at our web site:
*
* http://rapid-i.com
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see http://www.gnu.org/licenses/.
*/
package com.rapidminer.gui.tools.syntax;
/*
* ShellScriptTokenMarker.java - Shell script token marker
* Copyright (C) 1998, 1999 Slava Pestov
*
* You may use and modify this package for any purpose. Redistribution is
* permitted, in both source and binary form, provided that this notice
* remains intact in all source distributions of this package.
*/
import javax.swing.text.Segment;
/**
* Shell script token marker.
*
* @author Slava Pestov, Ingo Mierswa
* @version $Id: ShellScriptTokenMarker.java,v 1.3 2008/05/09 19:22:56 ingomierswa Exp $
*/
public class ShellScriptTokenMarker extends TokenMarker {
// public members
public static final byte LVARIABLE = Token.INTERNAL_FIRST;
public byte markTokensImpl(byte token, Segment line, int lineIndex) {
char[] array = line.array;
byte cmdState = 0; // 0 = space before command, 1 = inside
// command, 2 = after command
int offset = line.offset;
int lastOffset = offset;
int length = line.count + offset;
if (token == Token.LITERAL1 && lineIndex != 0 && lineInfo[lineIndex - 1].obj != null) {
String str = (String) lineInfo[lineIndex - 1].obj;
if (str != null && str.length() == line.count && SyntaxUtilities.regionMatches(false, line, offset, str)) {
addToken(line.count, Token.LITERAL1);
return Token.NULL;
} else {
addToken(line.count, Token.LITERAL1);
lineInfo[lineIndex].obj = str;
return Token.LITERAL1;
}
}
boolean backslash = false;
loop: for (int i = offset; i < length; i++) {
int i1 = (i + 1);
char c = array[i];
if (c == '\\') {
backslash = !backslash;
continue;
}
switch (token) {
case Token.NULL:
switch (c) {
case ' ':
case '\t':
case '(':
case ')':
backslash = false;
if (cmdState == 1/* insideCmd */) {
addToken(i - lastOffset, Token.KEYWORD1);
lastOffset = i;
cmdState = 2; /* afterCmd */
}
break;
case '=':
backslash = false;
if (cmdState == 1/* insideCmd */) {
addToken(i - lastOffset, token);
lastOffset = i;
cmdState = 2; /* afterCmd */
}
break;
case '&':
case '|':
case ';':
if (backslash)
backslash = false;
else
cmdState = 0; /* beforeCmd */
break;
case '#':
if (backslash)
backslash = false;
else {
addToken(i - lastOffset, token);
addToken(length - i, Token.COMMENT1);
lastOffset = length;
break loop;
}
break;
case '$':
if (backslash)
backslash = false;
else {
addToken(i - lastOffset, token);
cmdState = 2; /* afterCmd */
lastOffset = i;
if (length - i >= 2) {
switch (array[i1]) {
case '(':
continue;
case '{':
token = LVARIABLE;
break;
default:
token = Token.KEYWORD2;
break;
}
} else
token = Token.KEYWORD2;
}
break;
case '"':
if (backslash)
backslash = false;
else {
addToken(i - lastOffset, token);
token = Token.LITERAL1;
lineInfo[lineIndex].obj = null;
cmdState = 2; /* afterCmd */
lastOffset = i;
}
break;
case '\'':
if (backslash)
backslash = false;
else {
addToken(i - lastOffset, token);
token = Token.LITERAL2;
cmdState = 2; /* afterCmd */
lastOffset = i;
}
break;
case '<':
if (backslash)
backslash = false;
else {
if (length - i > 1 && array[i1] == '<') {
addToken(i - lastOffset, token);
token = Token.LITERAL1;
lastOffset = i;
lineInfo[lineIndex].obj = new String(array, i + 2, length - (i + 2));
}
}
break;
default:
backslash = false;
if (Character.isLetter(c)) {
if (cmdState == 0 /* beforeCmd */) {
addToken(i - lastOffset, token);
lastOffset = i;
cmdState++; /* insideCmd */
}
}
break;
}
break;
case Token.KEYWORD2:
backslash = false;
if (!Character.isLetterOrDigit(c) && c != '_') {
if (i != offset && array[i - 1] == '$') {
addToken(i1 - lastOffset, token);
lastOffset = i1;
token = Token.NULL;
continue;
} else {
addToken(i - lastOffset, token);
lastOffset = i;
token = Token.NULL;
}
}
break;
case Token.LITERAL1:
if (backslash)
backslash = false;
else if (c == '"') {
addToken(i1 - lastOffset, token);
cmdState = 2; /* afterCmd */
lastOffset = i1;
token = Token.NULL;
} else
backslash = false;
break;
case Token.LITERAL2:
if (backslash)
backslash = false;
else if (c == '\'') {
addToken(i1 - lastOffset, Token.LITERAL1);
cmdState = 2; /* afterCmd */
lastOffset = i1;
token = Token.NULL;
} else
backslash = false;
break;
case LVARIABLE:
backslash = false;
if (c == '}') {
addToken(i1 - lastOffset, Token.KEYWORD2);
lastOffset = i1;
token = Token.NULL;
}
break;
default:
throw new InternalError("Invalid state: " + token);
}
}
switch (token) {
case Token.NULL:
if (cmdState == 1)
addToken(length - lastOffset, Token.KEYWORD1);
else
addToken(length - lastOffset, token);
break;
case Token.LITERAL2:
addToken(length - lastOffset, Token.LITERAL1);
break;
case Token.KEYWORD2:
addToken(length - lastOffset, token);
token = Token.NULL;
break;
case LVARIABLE:
addToken(length - lastOffset, Token.INVALID);
token = Token.NULL;
break;
default:
addToken(length - lastOffset, token);
break;
}
return token;
}
}