svn-gvsig-desktop / trunk / org.gvsig.desktop / org.gvsig.desktop.library / org.gvsig.utils / src / main / java / org / gvsig / utils / console / jedit / TeXTokenMarker.java @ 40561
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/**
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2013 gvSIG Association.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 3
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.utils.console.jedit; |
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/*
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* TeXTokenMarker.java - TeX/LaTeX/AMS-TeX token marker
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* Copyright (C) 1998 Slava Pestov
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*
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* You may use and modify this package for any purpose. Redistribution is
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* permitted, in both source and binary form, provided that this notice
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* remains intact in all source distributions of this package.
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*/
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import javax.swing.text.Segment; |
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/**
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* TeX token marker.
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*
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* @author Slava Pestov
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* @version $Id$
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*/
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public class TeXTokenMarker extends TokenMarker |
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{ |
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// public members
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public static final byte BDFORMULA = Token.INTERNAL_FIRST; |
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public static final byte EDFORMULA = (byte)(Token.INTERNAL_FIRST + 1); |
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public byte markTokensImpl(byte token, Segment line, int lineIndex) |
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{ |
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char[] array = line.array; |
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int offset = line.offset;
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int lastOffset = offset;
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int length = line.count + offset;
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boolean backslash = false; |
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loop: for(int i = offset; i < length; i++) |
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{ |
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int i1 = (i+1); |
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char c = array[i];
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// if a backslash is followed immediately
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// by a non-alpha character, the command at
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// the non-alpha char. If we have a backslash,
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// some text, and then a non-alpha char,
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// the command ends before the non-alpha char.
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if(Character.isLetter(c)) |
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{ |
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backslash = false;
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} |
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else
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{ |
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if(backslash)
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{ |
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// \<non alpha>
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// we skip over this character,
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// hence the `continue'
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backslash = false;
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if(token == Token.KEYWORD2 || token == EDFORMULA)
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token = Token.KEYWORD2; |
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addToken(i1 - lastOffset,token); |
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lastOffset = i1; |
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if(token == Token.KEYWORD1)
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token = Token.NULL; |
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continue;
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} |
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else
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{ |
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//\blah<non alpha>
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// we leave the character in
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// the stream, and it's not
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// part of the command token
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if(token == BDFORMULA || token == EDFORMULA)
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token = Token.KEYWORD2; |
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addToken(i - lastOffset,token); |
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if(token == Token.KEYWORD1)
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token = Token.NULL; |
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lastOffset = i; |
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} |
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} |
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switch(c)
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{ |
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case '%': |
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if(backslash)
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{ |
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backslash = false;
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break;
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} |
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addToken(i - lastOffset,token); |
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addToken(length - i,Token.COMMENT1); |
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lastOffset = length; |
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break loop;
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case '\\': |
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backslash = true;
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if(token == Token.NULL)
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{ |
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token = Token.KEYWORD1; |
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addToken(i - lastOffset,Token.NULL); |
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lastOffset = i; |
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} |
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break;
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case '$': |
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backslash = false;
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if(token == Token.NULL) // singe $ |
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{ |
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token = Token.KEYWORD2; |
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addToken(i - lastOffset,Token.NULL); |
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lastOffset = i; |
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} |
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else if(token == Token.KEYWORD1) // \...$ |
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{ |
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token = Token.KEYWORD2; |
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addToken(i - lastOffset,Token.KEYWORD1); |
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lastOffset = i; |
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} |
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else if(token == Token.KEYWORD2) // $$aaa |
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{ |
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if(i - lastOffset == 1 && array[i-1] == '$') |
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{ |
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token = BDFORMULA; |
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break;
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} |
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token = Token.NULL; |
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addToken(i1 - lastOffset,Token.KEYWORD2); |
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lastOffset = i1; |
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} |
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else if(token == BDFORMULA) // $$aaa$ |
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{ |
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token = EDFORMULA; |
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} |
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else if(token == EDFORMULA) // $$aaa$$ |
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{ |
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token = Token.NULL; |
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addToken(i1 - lastOffset,Token.KEYWORD2); |
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lastOffset = i1; |
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} |
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break;
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} |
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} |
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if(lastOffset != length)
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addToken(length - lastOffset,token == BDFORMULA |
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|| token == EDFORMULA ? Token.KEYWORD2 : |
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token); |
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return (token != Token.KEYWORD1 ? token : Token.NULL);
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} |
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} |