net.sourceforge.phpeclipse.xml.ui/src/net/sourceforge/phpeclipse/xml/ui/internal/text/XMLCDATAScanner.java

   1 /*
   2  * Copyright (c) 2002-2004 Widespace, OU and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     Igor Malinin - initial contribution
  10  *
  11  * $Id: XMLCDATAScanner.java,v 1.3 2007-04-05 07:50:15 toshihiro Exp $
  12  */
  13
  14 package net.sourceforge.phpeclipse.xml.ui.internal.text;
  15
  16 import java.util.Map;
  17
  18 import net.sourceforge.phpeclipse.xml.ui.text.IXMLSyntaxConstants;
  19
  20 import org.eclipse.jface.text.BadLocationException;
  21 import org.eclipse.jface.text.IDocument;
  22 import org.eclipse.jface.text.rules.IToken;
  23 import org.eclipse.jface.text.rules.ITokenScanner;
  24 import org.eclipse.jface.text.rules.Token;
  25
  26 /**
  27  * @author Igor Malinin
  28  */
  29 public class XMLCDATAScanner implements ITokenScanner {
  30
  31         private Map tokens;
  32
  33         private IDocument document;
  34
  35         private int begin;
  36
  37         private int end;
  38
  39         private int offset;
  40
  41         private int length;
  42
  43         private int position;
  44
  45         public XMLCDATAScanner(Map tokens) {
  46                 this.tokens = tokens;
  47         }
  48
  49         /*
  50          * @see ITokenScanner#setRange(IDocument, int, int)
  51          */
  52         public void setRange(IDocument document, int offset, int length) {
  53                 this.document = document;
  54
  55                 this.begin = offset;
  56                 this.end = offset + length;
  57
  58                 this.offset = offset;
  59                 this.position = offset;
  60                 this.length = 0;
  61         }
  62
  63         /*
  64          * @see ITokenScanner#nextToken()
  65          */
  66         public IToken nextToken() {
  67                 offset += length;
  68
  69                 if (position == begin) {
  70 //#1622108
  71 //                      position += 3; // <![
  72 //                      try {
  73 //                              if (document.get(position, 6).equals("CDATA[")) {
  74 //                                      position += 6;
  75 //                              }
  76 //                      } catch (BadLocationException e) {
  77 //                      }
  78                         try {
  79                                 if (document.get(position, 3).equals("<![")) {
  80                                         position += 3;
  81                                         if (document.get(position, 6).equals("CDATA[")) {
  82                                                 position += 6;
  83                                         }
  84                                 } // else: xml cdata part is divided by php script block
  85                         } catch (BadLocationException e) {
  86                         }
  87
  88                         return getToken(IXMLSyntaxConstants.XML_CDATA);
  89                 }
  90
  91                 if (position == end) {
  92                         return getToken(null);
  93                 }
  94
  95                 try {
  96                         int p = end - 3;
  97                         if (document.get(p, 3).equals("]]>")) {
  98                                 if (position == p) {
  99                                         position = end;
 100                                         return getToken(IXMLSyntaxConstants.XML_CDATA);
 101                                 }
 102
 103                                 position = p;
 104                         } else {
 105                                 position = end;
 106                         }
 107                 } catch (BadLocationException e) {
 108                 }
 109
 110                 return getToken(IXMLSyntaxConstants.XML_DEFAULT);
 111         }
 112
 113         private IToken getToken(String type) {
 114                 length = position - offset;
 115
 116                 if (length == 0) {
 117                         return Token.EOF;
 118                 }
 119
 120                 if (type == null) {
 121                         return Token.UNDEFINED;
 122                 }
 123
 124                 IToken token = (IToken) tokens.get(type);
 125                 if (token == null) {
 126                         return Token.UNDEFINED;
 127                 }
 128
 129                 return token;
 130         }
 131
 132         /*
 133          * @see ITokenScanner#getTokenOffset()
 134          */
 135         public int getTokenOffset() {
 136                 return offset;
 137         }
 138
 139         /*
 140          * @see ITokenScanner#getTokenLength()
 141          */
 142         public int getTokenLength() {
 143                 return length;
 144         }
 145 }