Eclipse3M7 version
[phpeclipse.git] / net.sourceforge.phpeclipse / src / net / sourceforge / phpeclipse / phpeditor / php / PHPPartitionScanner.java
index 00ec730..0157acb 100644 (file)
-/**********************************************************************
-Copyright (c) 2000, 2002 IBM Corp. and others.
-All rights reserved. This program and the accompanying materials
-are made available under the terms of the Common Public License v1.0
-which accompanies this distribution, and is available at
-http://www.eclipse.org/legal/cpl-v10.html
-
-Contributors:
-    IBM Corporation - Initial implementation
-    Klaus Hartlage - www.eclipseproject.de
-**********************************************************************/
+/**
+ * This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ * Created on 05.03.2003
+ *
+ * @author Stefan Langer (musk)
+ * @version $Revision: 1.22 $
+ */
 package net.sourceforge.phpeclipse.phpeditor.php;
 
 import java.util.ArrayList;
-import java.util.List;
-import org.eclipse.jface.text.rules.EndOfLineRule;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.eclipse.jface.text.Assert;
+import org.eclipse.jface.text.BadLocationException;
+import org.eclipse.jface.text.IDocument;
+import org.eclipse.jface.text.ITypedRegion;
 import org.eclipse.jface.text.rules.ICharacterScanner;
-import org.eclipse.jface.text.rules.IPredicateRule;
-import org.eclipse.jface.text.rules.IRule;
+import org.eclipse.jface.text.rules.IPartitionTokenScanner;
 import org.eclipse.jface.text.rules.IToken;
-import org.eclipse.jface.text.rules.IWordDetector;
-import org.eclipse.jface.text.rules.MultiLineRule;
-import org.eclipse.jface.text.rules.RuleBasedPartitionScanner;
-import org.eclipse.jface.text.rules.RuleBasedScanner;
-import org.eclipse.jface.text.rules.SingleLineRule;
 import org.eclipse.jface.text.rules.Token;
-import org.eclipse.jface.text.rules.WordRule;
 
 /**
- * This scanner recognizes the JavaDoc comments and Java multi line comments.
+ * 
  */
-public class PHPPartitionScanner extends RuleBasedPartitionScanner {
-
-       private final static String SKIP = "__skip"; //$NON-NLS-1$
-       public final static String JAVA_MULTILINE_COMMENT = "__html_multiline_comment"; //$NON-NLS-1$
-       //      public final static String JAVA_DOC= "__java_javadoc"; //$NON-NLS-1$
-       public final static String PHP = "__php";
-
-       public class PHPMultiLineRule extends MultiLineRule {
-
-               public PHPMultiLineRule(String startSequence, String endSequence, IToken token) {
-                       super(startSequence, endSequence, token);
-               }
-
-               public PHPMultiLineRule(String startSequence, String endSequence, IToken token, char escapeCharacter) {
-                       super(startSequence, endSequence, token, escapeCharacter);
-               }
-
-               protected boolean endSequenceDetected(ICharacterScanner scanner) {
-                       int c;
-                       int c2;
-
-                       boolean lineCommentMode = false;
-                       boolean multiLineCommentMode = false;
-                       boolean stringMode = false;
-
-                       char[][] delimiters = scanner.getLegalLineDelimiters();
-                       while ((c = scanner.read()) != ICharacterScanner.EOF) {
-                               if (c == '\n') {
-                                       lineCommentMode = false;
-                                       // read until end of line
-                               } else if (c == '#') {
-                                       // read until end of line
-                                       lineCommentMode = true;
-                                       continue;
-                               } else if (c == '/') {
-                                       c2 = scanner.read();
-                                       if (c2 == '/') {
-                                               lineCommentMode = true;
-            continue;
-                                       }       else if(c2 == '*') {
-                                               multiLineCommentMode = true;
-                                               continue;
-                                       } else {
-                                               scanner.unread();
-                                       }
-                               } else if (c == '*' && multiLineCommentMode) {
-                                       c2 = scanner.read();
-                                       if (c2 == '/') {
-                                               multiLineCommentMode = false;
-                                               continue;
-                                       } else {
-                                               scanner.unread();
-                                       }
-                               } else if (c == '\\' && stringMode) {
-                                       c2 = scanner.read();
-                                       if (c2 == '"') {
-                                               continue;
-                                       } else {
-                                               scanner.unread();
-                                       }
-                               } else if (c == '"') {
-                                       if (stringMode) {
-                                               stringMode = false;
-                                       } else {
-                                               stringMode = true;
-                                       }
-                                       continue;
-                               }
-                               if (lineCommentMode || multiLineCommentMode || stringMode) {
-                                       continue;
-                               }
-
-                               if (c == fEscapeCharacter) {
-                                       // Skip the escaped character.
-                                       scanner.read();
-                               } else if (fEndSequence.length > 0 && c == fEndSequence[0]) {
-                                       // Check if the specified end sequence has been found.
-                                       if (sequenceDetected(scanner, fEndSequence, true))
-                                               return true;
-                               } else if (fBreaksOnEOL) {
-                                       // Check for end of line since it can be used to terminate the pattern.
-                                       for (int i = 0; i < delimiters.length; i++) {
-                                               if (c == delimiters[i][0] && sequenceDetected(scanner, delimiters[i], false))
-                                                       return true;
-                                       }
-                               }
-                       }
-                       scanner.unread();
-                       return true;
-               }
-       }
-       /**
-        * Detector for empty comments.
-        */
-       static class EmptyCommentDetector implements IWordDetector {
-
-               /* (non-Javadoc)
-               * Method declared on IWordDetector
-                       */
-               public boolean isWordStart(char c) {
-                       return (c == '/');
-               }
-
-               /* (non-Javadoc)
-               * Method declared on IWordDetector
-                       */
-               public boolean isWordPart(char c) {
-                       return (c == '*' || c == '/');
-               }
-       };
-
-       /**
-        * 
-        */
-       static class WordPredicateRule extends WordRule implements IPredicateRule {
-
-               private IToken fSuccessToken;
-
-               public WordPredicateRule(IToken successToken) {
-                       super(new EmptyCommentDetector());
-                       fSuccessToken = successToken;
-                       addWord("/**/", fSuccessToken);
-               }
-
-               /*
-                * @see org.eclipse.jface.text.rules.IPredicateRule#evaluate(ICharacterScanner, boolean)
-                */
-               public IToken evaluate(ICharacterScanner scanner, boolean resume) {
-                       return super.evaluate(scanner);
-               }
-
-               /*
-                * @see org.eclipse.jface.text.rules.IPredicateRule#getSuccessToken()
-                */
-               public IToken getSuccessToken() {
-                       return fSuccessToken;
-               }
-       };
-
-       /**
-        * Creates the partitioner and sets up the appropriate rules.
-        */
-       public PHPPartitionScanner() {
-               super();
-
-               //              IToken javaDoc= new Token(JAVA_DOC);
-               IToken comment = new Token(JAVA_MULTILINE_COMMENT);
-               IToken php = new Token(PHP);
-
-               List rules = new ArrayList();
-
-               // Add rule for single line comments.
-               //      rules.add(new EndOfLineRule("//", Token.UNDEFINED));
-
-               // Add rule for strings and character constants.
-               //              rules.add(new SingleLineRule("\"", "\"", Token.UNDEFINED, '\\'));
-               //      rules.add(new SingleLineRule("'", "'", Token.UNDEFINED, '\\')); 
-
-               // Add special case word rule.
-               rules.add(new WordPredicateRule(comment));
-
-               // Add rules for multi-line comments and javadoc.
-               //rules.add(new MultiLineRule("/**", "*/", javaDoc));
-               rules.add(new MultiLineRule("<!--", "-->", comment));
-               rules.add(new PHPMultiLineRule("<? ", "?>", php));
-               rules.add(new PHPMultiLineRule("<?php", "?>", php));
-               rules.add(new PHPMultiLineRule("<?PHP", "?>", php));
-               //Add rule for processing instructions
-
-               IPredicateRule[] result = new IPredicateRule[rules.size()];
-               rules.toArray(result);
-               setPredicateRules(result);
-       }
+public class PHPPartitionScanner implements IPartitionTokenScanner {
+  private static final boolean DEBUG = false;
+
+  private boolean fInString = false;
+  private boolean fInDoubString = false;
+  private IDocument fDocument = null;
+  private int fOffset = -1;
+  private String fContentType = IPHPPartitionScannerConstants.HTML;
+  private String fPrevContentType = IPHPPartitionScannerConstants.HTML;
+  private boolean partitionBorder = false;
+  private int fTokenOffset;
+  private int fEnd = -1;
+  private int fLength;
+  private int fCurrentLength;
+  private int fFileType;
+  private Map tokens = new HashMap();
+
+  public PHPPartitionScanner() {
+       this(IPHPPartitionScannerConstants.PHP_FILE);
+  }
+  
+  public PHPPartitionScanner(int fileType) {
+    this.tokens.put(IPHPPartitionScannerConstants.PHP, new Token(IPHPPartitionScannerConstants.PHP));
+    this.tokens.put(
+      IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT,
+      new Token(IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT));
+    this.tokens.put(IPHPPartitionScannerConstants.HTML, new Token(IPHPPartitionScannerConstants.HTML));
+    this.tokens.put(
+      IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT,
+      new Token(IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT));
+
+    this.tokens.put(IPHPPartitionScannerConstants.SMARTY, new Token(IPHPPartitionScannerConstants.SMARTY));
+    this.tokens.put(
+      IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT,
+      new Token(IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT));
+
+    this.tokens.put(IDocument.DEFAULT_CONTENT_TYPE, new Token(IDocument.DEFAULT_CONTENT_TYPE));
+    fFileType = fileType;
+  }
+
+  private IToken getToken(String type) {
+    fLength = fCurrentLength;
+    if (DEBUG) {
+
+      try {
+        if (fLength <= 0) {
+          int line = fDocument.getLineOfOffset(fOffset);
+          System.err.println("Error at " + line + " offset:" + String.valueOf(fOffset - fDocument.getLineOffset(line)));
+        }
+      } catch (BadLocationException e) { // should never happen
+        // TODO Write stacktrace to log
+        e.printStackTrace();
+      }
+    }
+    Assert.isTrue(fLength > 0, "Partition length <= 0!");
+    fCurrentLength = 0;
+    // String can never cross partition borders so reset string detection
+    fInString = false;
+    fInDoubString = false;
+    IToken token = (IToken) this.tokens.get(type);
+    Assert.isNotNull(token, "Token for type \"" + type + "\" not found!");
+    if (DEBUG) {
+      System.out.println("Partition: fTokenOffset=" + fTokenOffset + " fContentType=" + type + " fLength=" + fLength);
+    }
+    return token;
+  }
+
+  /* (non-Javadoc)
+   * @see org.eclipse.jface.text.rules.IPartitionTokenScanner#setPartialRange(org.eclipse.jface.text.IDocument, int, int, java.lang.String, int)
+   */
+  public void setPartialRange(IDocument document, int offset, int length, String contentType, int partitionOffset) {
+    if (DEBUG) {
+      System.out.println("*****");
+      System.out.println("PartialRange: contentType=" + contentType + " partitionOffset=" + partitionOffset);
+    }
+
+    try {
+      if (partitionOffset > -1) {
+        partitionBorder = false;
+        // because of strings we have to parse the whole partition
+        this.setRange(document, partitionOffset, offset - partitionOffset + length);
+        // sometimes we get a wrong partition so we retrieve the partition
+        // directly from the document
+        fContentType = fDocument.getContentType(partitionOffset);
+      } else
+        this.setRange(document, offset, length);
+
+    } catch (BadLocationException e) {
+      // should never happen
+      // TODO print stack trace to log
+      // fall back just scan the whole document again
+      this.setRange(document, 0, fDocument.getLength());
+    }
+
+  }
+
+  /* (non-Javadoc)
+   * @see org.eclipse.jface.text.rules.ITokenScanner#getTokenLength()
+   */
+  public int getTokenLength() {
+    return fLength;
+  }
+
+  /* (non-Javadoc)
+   * @see org.eclipse.jface.text.rules.ITokenScanner#getTokenOffset()
+   */
+  public int getTokenOffset() {
+    return fTokenOffset;
+  }
+
+  /* (non-Javadoc)
+   * @see org.eclipse.jface.text.rules.ITokenScanner#nextToken()
+   */
+  public IToken nextToken() {
+    int c;
+
+    // check if we are not allready at the end of the
+    // file
+    if ((c = read()) == ICharacterScanner.EOF) {
+      partitionBorder = false;
+      return Token.EOF;
+    } else
+      unread();
+
+    if (partitionBorder) {
+      fTokenOffset = fOffset;
+      partitionBorder = false;
+    }
+
+    while ((c = read()) != ICharacterScanner.EOF) {
+      switch (c) {
+        case '<' :
+          if (!isInString(IPHPPartitionScannerConstants.PHP)
+            && fContentType != IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT
+            && checkPattern(new char[] { '?', 'p', 'h', 'p' }, true)) {
+            if (fContentType != IPHPPartitionScannerConstants.PHP && fCurrentLength > 5) {
+              unread(5);
+              IToken token = getToken(fContentType);
+              // save previouse contenttype
+              //TODO build stack for previouse contenttype 
+              fPrevContentType = fContentType;
+
+              fContentType = IPHPPartitionScannerConstants.PHP;
+
+              return token;
+            } else
+              fContentType = IPHPPartitionScannerConstants.PHP;
+
+            // remember offset of this partition
+            fTokenOffset = fOffset - 5;
+            fCurrentLength = 5;
+          } else if (
+            !isInString(IPHPPartitionScannerConstants.PHP)
+              && fContentType != IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT
+              && checkPattern(new char[] { '?' }, false)) {
+            if (fContentType != IPHPPartitionScannerConstants.PHP && fCurrentLength > 2) {
+              unread(2);
+              IToken token = getToken(fContentType);
+              // save previouse contenttype
+              fPrevContentType = fContentType;
+              fContentType = IPHPPartitionScannerConstants.PHP;
+              return token;
+            } else
+              fContentType = IPHPPartitionScannerConstants.PHP;
+            // remember offset of this partition
+            fTokenOffset = fOffset - 2;
+            fCurrentLength = 2;
+          } else if (
+            !isInString(IPHPPartitionScannerConstants.PHP)
+              && (fContentType != IPHPPartitionScannerConstants.PHP) // BUG #769044
+              && (fContentType != IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT) // BUG #769044
+              && checkPattern(new char[] { '!', '-', '-' })) { // return previouse partition
+            if (fContentType != IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT && fCurrentLength > 4) {
+              unread(4);
+              IToken token = getToken(fContentType);
+              fContentType = IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT;
+              return token;
+            } else
+              fContentType = IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT;
+
+            fTokenOffset = fOffset - 4;
+            fCurrentLength = 4;
+          }
+          break;
+        case '?' :
+          if (!isInString(IPHPPartitionScannerConstants.PHP) && fContentType == IPHPPartitionScannerConstants.PHP) {
+            if ((c = read()) == '>') {
+              if (fPrevContentType != null)
+                fContentType = fPrevContentType;
+              else
+                fContentType = IPHPPartitionScannerConstants.HTML;
+              partitionBorder = true;
+              return getToken(IPHPPartitionScannerConstants.PHP);
+            } else if (c != ICharacterScanner.EOF)
+              unread();
+          }
+          break;
+        case '-' :
+          if (!isInString(IPHPPartitionScannerConstants.PHP)
+            && fContentType == IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT
+            && checkPattern(new char[] { '-', '>' })) {
+            fContentType = IPHPPartitionScannerConstants.HTML;
+            partitionBorder = true;
+            return getToken(IPHPPartitionScannerConstants.HTML_MULTILINE_COMMENT);
+          }
+          break;
+        case '{' : // SMARTY code starts here ?
+          if (fFileType == IPHPPartitionScannerConstants.SMARTY_FILE) {
+            if ((c = read()) == '*') {
+              if (DEBUG) {
+                System.out.println(
+                  "SMARTYDOC_TOKEN start "
+                    + fTokenOffset
+                    + " fContentType="
+                    + fContentType
+                    + " fLength="
+                    + fLength
+                    + " fOffset="
+                    + fOffset
+                    + " fCurrentLength="
+                    + fCurrentLength);
+              }
+              if (fContentType != IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT && fCurrentLength > 2) {
+                // SMARTY doc code starts here 
+                unread(2);
+                IToken token = getToken(fContentType);
+                fContentType = IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT;
+                return token;
+                //              } else if (fContentType == IPHPPartitionScannerConstants.HTML && fOffset == 2) {
+                //                fContentType = IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT;
+              } else { // if (fContentType == IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT) {
+                fContentType = IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT;
+                fTokenOffset = fOffset - 2;
+                fCurrentLength = 2;
+              }
+              break;
+            }
+            if (DEBUG) {
+              System.out.println(
+                "SMARTY_TOKEN start "
+                  + fTokenOffset
+                  + " fContentType="
+                  + fContentType
+                  + " fLength="
+                  + fLength
+                  + " fOffset="
+                  + fOffset);
+            }
+            if (c != ICharacterScanner.EOF) {
+               unread();
+            }
+            if (fContentType != IPHPPartitionScannerConstants.SMARTY && fCurrentLength > 1) {
+              unread(1);
+              IToken token = getToken(fContentType);
+              fContentType = IPHPPartitionScannerConstants.SMARTY;
+              return token;
+              //            } else if (fContentType == IPHPPartitionScannerConstants.HTML && fOffset==1) {
+              //              fContentType = IPHPPartitionScannerConstants.SMARTY;
+            } else {
+              fContentType = IPHPPartitionScannerConstants.SMARTY;
+              fTokenOffset = fOffset - 1;
+              fCurrentLength = 1;
+            }
+          }
+          break;
+        case '}' : // SMARTY code ends here ?
+          if (fFileType == IPHPPartitionScannerConstants.SMARTY_FILE && fContentType == IPHPPartitionScannerConstants.SMARTY) {
+            if (DEBUG) {
+              System.out.println(
+                "SMARTY_TOKEN end "
+                  + fTokenOffset
+                  + " fContentType="
+                  + fContentType
+                  + " fLength="
+                  + fLength
+                  + " fOffset="
+                  + fOffset);
+            }
+            fContentType = IPHPPartitionScannerConstants.HTML;
+            partitionBorder = true;
+            return getToken(IPHPPartitionScannerConstants.SMARTY);
+          }
+          break;
+        case '/' :
+          if (!isInString(IPHPPartitionScannerConstants.PHP) && (c = read()) == '*') { // MULTINE COMMENT JAVASCRIPT, CSS, PHP
+            if (fContentType == IPHPPartitionScannerConstants.PHP && fCurrentLength > 2) {
+              unread(2);
+              IToken token = getToken(fContentType);
+              fContentType = IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT;
+              return token;
+            } else if (fContentType == IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT) {
+              fTokenOffset = fOffset - 2;
+              fCurrentLength = 2;
+            }
+
+          } else if (!isInString(IPHPPartitionScannerConstants.PHP) && c != ICharacterScanner.EOF)
+            unread();
+          break;
+        case '*' :
+          if (!isInString(IPHPPartitionScannerConstants.PHP) && (c = read()) == '/') {
+            if (fContentType == IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT) {
+              fContentType = IPHPPartitionScannerConstants.PHP;
+              partitionBorder = true;
+              return getToken(IPHPPartitionScannerConstants.PHP_MULTILINE_COMMENT);
+            } else if (fContentType == IPHPPartitionScannerConstants.CSS_MULTILINE_COMMENT) {
+            } else if (fContentType == IPHPPartitionScannerConstants.JS_MULTILINE_COMMENT) {
+            }
+          } else if (fFileType == IPHPPartitionScannerConstants.SMARTY_FILE && (c = read()) == '}') {
+            if (DEBUG) {
+              System.out.println(
+                "SMARTYDOC_TOKEN end "
+                  + fTokenOffset
+                  + " fContentType="
+                  + fContentType
+                  + " fLength="
+                  + fLength
+                  + " fOffset="
+                  + fOffset);
+            }
+            if (fContentType == IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT) {
+              fContentType = IPHPPartitionScannerConstants.HTML;
+              partitionBorder = true;
+              return getToken(IPHPPartitionScannerConstants.SMARTY_MULTILINE_COMMENT);
+            }
+          } else if (!isInString(IPHPPartitionScannerConstants.PHP) && c != ICharacterScanner.EOF) {
+            unread();
+          }
+          break;
+        case '\'' :
+          if (!fInDoubString)
+            fInString = !fInString;
+          break;
+        case '"' :
+          // toggle String mode
+          if (!fInString)
+            fInDoubString = !fInDoubString;
+          break;
+      }
+    } // end of file reached but we have to return the
+    // last partition.
+    return getToken(fContentType);
+  }
+  /* (non-Javadoc)
+   * @see org.eclipse.jface.text.rules.ITokenScanner#setRange(org.eclipse.jface.text.IDocument, int, int)
+   */
+  public void setRange(IDocument document, int offset, int length) {
+    if (DEBUG) {
+      System.out.println("SET RANGE: offset=" + offset + " length=" + length);
+    }
+
+    fDocument = document;
+    fOffset = offset;
+    fTokenOffset = offset;
+    fCurrentLength = 0;
+    fLength = 0;
+    fEnd = fOffset + length;
+    fInString = false;
+    fInDoubString = false;
+    fContentType = IPHPPartitionScannerConstants.HTML;
+    //        String[] prev = getPartitionStack(offset);
+  }
+
+  private int read() {
+    try {
+      if (fOffset < fEnd) {
+        fCurrentLength++;
+        return fDocument.getChar(fOffset++);
+      }
+      return ICharacterScanner.EOF;
+    } catch (BadLocationException e) {
+      // should never happen
+      // TODO write stacktrace to log
+      fOffset = fEnd;
+      return ICharacterScanner.EOF;
+    }
+  }
+
+  private void unread() {
+    --fOffset;
+    --fCurrentLength;
+  }
+
+  private void unread(int num) {
+    fOffset -= num;
+    fCurrentLength -= num;
+  }
+
+  private boolean checkPattern(char[] pattern) {
+    return checkPattern(pattern, false);
+  }
+
+  /**
+   * Check if next character sequence read from document is equals to 
+   * the provided pattern. Pattern is read from left to right until the 
+   * first character read doesn't match. If this happens all read characters are
+   * unread.
+   * @param pattern The pattern to check.
+   * @return <code>true</code> if pattern is equals else returns <code>false</code>.
+   */
+  private boolean checkPattern(char[] pattern, boolean ignoreCase) {
+    int prevOffset = fOffset;
+    int prevLength = fCurrentLength;
+    for (int i = 0; i < pattern.length; i++) {
+      int c = read();
+
+      if (c == ICharacterScanner.EOF || !letterEquals(c, pattern[i], ignoreCase)) {
+        fOffset = prevOffset;
+        fCurrentLength = prevLength;
+        return false;
+      }
+    }
+
+    return true;
+  }
+
+  private boolean letterEquals(int test, char letter, boolean ignoreCase) {
+    if (test == letter)
+      return true;
+    else if (ignoreCase && Character.isLowerCase(letter) && test == Character.toUpperCase(letter))
+      return true;
+    else if (ignoreCase && Character.isUpperCase(letter) && test == Character.toLowerCase(letter))
+      return true;
+
+    return false;
+  }
+
+  /**
+   * Checks wether the offset is in a <code>String</code> and the specified 
+   * contenttype is the current content type.
+   * Strings are delimited, mutual exclusive, by a " or by a '.
+   * 
+   * @param contentType The contenttype to check.
+   * @return <code>true</code> if the current offset is in a string else 
+   *                   returns false.
+   */
+  private boolean isInString(String contentType) {
+    if (fContentType == contentType)
+      return (fInString || fInDoubString);
+    else
+      return false;
+  }
+
+  /**
+   * Returns the previouse partition stack for the given offset.
+   * 
+   * @param offset The offset to return the previouse partitionstack for.
+   * 
+   * @return The stack as a string array.
+   */
+  private String[] getPartitionStack(int offset) {
+    ArrayList types = new ArrayList();
+    int tmpOffset = 0;
+    try {
+      ITypedRegion region = fDocument.getPartition(offset);
+      tmpOffset = region.getOffset();
+      while (tmpOffset - 1 > 0) {
+        region = fDocument.getPartition(tmpOffset - 1);
+        tmpOffset = region.getOffset();
+        types.add(0, region.getType());
+      }
+    } catch (BadLocationException e) {
+      if (DEBUG) {
+        e.printStackTrace();
+      }
+    }
+
+    String[] retVal = new String[types.size()];
+
+    retVal = (String[]) types.toArray(retVal);
+    return retVal;
+  }
+
 }