/*
* 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;
/*
* PythonTokenMarker.java - Python token marker
* Copyright (C) 1999 Jonathan Revusky
* 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;
/**
* Python token marker.
*
* @author Jonathan Revusky, Ingo Mierswa
* @version $Id: PythonTokenMarker.java,v 1.3 2008/05/09 19:22:56 ingomierswa Exp $
*/
public class PythonTokenMarker extends TokenMarker {
private static final byte TRIPLEQUOTE1 = Token.INTERNAL_FIRST;
private static final byte TRIPLEQUOTE2 = Token.INTERNAL_LAST;
public PythonTokenMarker() {
this.keywords = getKeywords();
}
public byte markTokensImpl(byte token, Segment line, int lineIndex) {
char[] array = line.array;
int offset = line.offset;
lastOffset = offset;
lastKeyword = offset;
int length = line.count + offset;
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 '#':
if (backslash)
backslash = false;
else {
doKeyword(line, i, c);
addToken(i - lastOffset, token);
addToken(length - i, Token.COMMENT1);
lastOffset = lastKeyword = length;
break loop;
}
break;
case '"':
doKeyword(line, i, c);
if (backslash)
backslash = false;
else {
addToken(i - lastOffset, token);
if (SyntaxUtilities.regionMatches(false, line, i1, "\"\"")) {
token = TRIPLEQUOTE1;
} else {
token = Token.LITERAL1;
}
lastOffset = lastKeyword = i;
}
break;
case '\'':
doKeyword(line, i, c);
if (backslash)
backslash = false;
else {
addToken(i - lastOffset, token);
if (SyntaxUtilities.regionMatches(false, line, i1, "''")) {
token = TRIPLEQUOTE2;
} else {
token = Token.LITERAL2;
}
lastOffset = lastKeyword = i;
}
break;
default:
backslash = false;
if (!Character.isLetterOrDigit(c) && c != '_')
doKeyword(line, i, c);
break;
}
break;
case Token.LITERAL1:
if (backslash)
backslash = false;
else if (c == '"') {
addToken(i1 - lastOffset, token);
token = Token.NULL;
lastOffset = lastKeyword = i1;
}
break;
case Token.LITERAL2:
if (backslash)
backslash = false;
else if (c == '\'') {
addToken(i1 - lastOffset, Token.LITERAL1);
token = Token.NULL;
lastOffset = lastKeyword = i1;
}
break;
case TRIPLEQUOTE1:
if (backslash)
backslash = false;
else if (SyntaxUtilities.regionMatches(false, line, i, "\"\"\"")) {
addToken((i += 4) - lastOffset, Token.LITERAL1);
token = Token.NULL;
lastOffset = lastKeyword = i;
}
break;
case TRIPLEQUOTE2:
if (backslash)
backslash = false;
else if (SyntaxUtilities.regionMatches(false, line, i, "'''")) {
addToken((i += 4) - lastOffset, Token.LITERAL1);
token = Token.NULL;
lastOffset = lastKeyword = i;
}
break;
default:
throw new InternalError("Invalid state: " + token);
}
}
switch (token) {
case TRIPLEQUOTE1:
case TRIPLEQUOTE2:
addToken(length - lastOffset, Token.LITERAL1);
break;
case Token.NULL:
doKeyword(line, length, '\0');
break;
default:
addToken(length - lastOffset, token);
break;
}
return token;
}
public static KeywordMap getKeywords() {
if (pyKeywords == null) {
pyKeywords = new KeywordMap(false);
pyKeywords.add("and", Token.KEYWORD3);
pyKeywords.add("not", Token.KEYWORD3);
pyKeywords.add("or", Token.KEYWORD3);
pyKeywords.add("if", Token.KEYWORD1);
pyKeywords.add("for", Token.KEYWORD1);
pyKeywords.add("assert", Token.KEYWORD1);
pyKeywords.add("break", Token.KEYWORD1);
pyKeywords.add("continue", Token.KEYWORD1);
pyKeywords.add("elif", Token.KEYWORD1);
pyKeywords.add("else", Token.KEYWORD1);
pyKeywords.add("except", Token.KEYWORD1);
pyKeywords.add("exec", Token.KEYWORD1);
pyKeywords.add("finally", Token.KEYWORD1);
pyKeywords.add("raise", Token.KEYWORD1);
pyKeywords.add("return", Token.KEYWORD1);
pyKeywords.add("try", Token.KEYWORD1);
pyKeywords.add("while", Token.KEYWORD1);
pyKeywords.add("def", Token.KEYWORD2);
pyKeywords.add("class", Token.KEYWORD2);
pyKeywords.add("del", Token.KEYWORD2);
pyKeywords.add("from", Token.KEYWORD2);
pyKeywords.add("global", Token.KEYWORD2);
pyKeywords.add("import", Token.KEYWORD2);
pyKeywords.add("in", Token.KEYWORD2);
pyKeywords.add("is", Token.KEYWORD2);
pyKeywords.add("lambda", Token.KEYWORD2);
pyKeywords.add("pass", Token.KEYWORD2);
pyKeywords.add("print", Token.KEYWORD2);
}
return pyKeywords;
}
// private members
private static KeywordMap pyKeywords;
private KeywordMap keywords;
private int lastOffset;
private int lastKeyword;
private boolean doKeyword(Segment line, int i, char c) {
int i1 = i + 1;
int len = i - lastKeyword;
byte id = keywords.lookup(line, lastKeyword, len);
if (id != Token.NULL) {
if (lastKeyword != lastOffset)
addToken(lastKeyword - lastOffset, Token.NULL);
addToken(len, id);
lastOffset = i;
}
lastKeyword = i1;
return false;
}
}