ShellScriptTokenMarker.java :  » IDE » bluej-editor » org » syntax » jedit » tokenmarker » Java Open Source

/*
 * 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.
 */

package org.syntax.jedit.tokenmarker;

import org.syntax.jedit.*;
import javax.swing.text.Segment;

/**
 * Shell script token marker.
 *
 * @author Slava Pestov
 * @version $Id: ShellScriptTokenMarker.java 3074 2004-11-08 04:24:58Z bquig $
 */
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;
  }
}