1 // Copyright (c) 2009 The Chromium Authors. All rights reserved.

     2 // Use of this source code is governed by a BSD-style license that can be

     3 // found in the LICENSE file.

     4 

     5 package org.chromium.debug.ui.editors;

     6 

     7 import org.eclipse.jface.text.rules.EndOfLineRule;

     8 import org.eclipse.jface.text.rules.ICharacterScanner;

     9 import org.eclipse.jface.text.rules.IPredicateRule;

    10 import org.eclipse.jface.text.rules.IToken;

    11 import org.eclipse.jface.text.rules.IWordDetector;

    12 import org.eclipse.jface.text.rules.MultiLineRule;

    13 import org.eclipse.jface.text.rules.RuleBasedPartitionScanner;

    14 import org.eclipse.jface.text.rules.SingleLineRule;

    15 import org.eclipse.jface.text.rules.Token;

    16 import org.eclipse.jface.text.rules.WordRule;

    17 

    18 /**

    19  * JavaScript partition scanner.

    20  */

    21 public class JsPartitionScanner extends RuleBasedPartitionScanner {

    22 

    23   static final String PARTITIONING = "ChromiumJavaScriptPartitioning"; //$NON-NLS-1$

    24   static final String MULTILINE_COMMENT= "__js_multiline_comment"; //$NON-NLS-1$

    25   static final String JSDOC = "__jsdoc"; //$NON-NLS-1$

    26   static final String[] PARTITION_TYPES = {

    27     MULTILINE_COMMENT,

    28     JSDOC

    29   };

    30 

    31   /**

    32    * Empty comments should be handled so as not to be confused with JSDoc.

    33    */

    34   private static class EmptyCommentDetector implements IWordDetector {

    35 

    36     public boolean isWordStart(char c) {

    37       return (c == '/');

    38     }

    39 

    40     public boolean isWordPart(char c) {

    41       return (c == '*' || c == '/');

    42     }

    43   }

    44 

    45   private static class EmptyCommentPredicateRule extends WordRule implements IPredicateRule {

    46     private final IToken successToken;

    47 

    48     public EmptyCommentPredicateRule(IToken successToken) {

    49       super(new EmptyCommentDetector());

    50       this.successToken = successToken;

    51       addWord("/**/", successToken); //$NON-NLS-1$

    52     }

    53 

    54     public IToken evaluate(ICharacterScanner scanner, boolean resume) {

    55       return super.evaluate(scanner);

    56     }

    57 

    58     public IToken getSuccessToken() {

    59       return successToken;

    60     }

    61   }

    62 

    63   public JsPartitionScanner() {

    64     IToken jsDocToken= new Token(JSDOC);

    65     IToken multilineCommentToken= new Token(MULTILINE_COMMENT);

    66 

    67     setPredicateRules(new IPredicateRule[] {

    68         new EndOfLineRule("//", Token.UNDEFINED), //$NON-NLS-1$

    69         new SingleLineRule("\"", "\"", Token.UNDEFINED, '\\'), //$NON-NLS-2$ //$NON-NLS-1$

    70         new SingleLineRule("'", "'", Token.UNDEFINED, '\\'), //$NON-NLS-2$ //$NON-NLS-1$

    71         new EmptyCommentPredicateRule(multilineCommentToken),

    72         new MultiLineRule("/**", "*/", jsDocToken, (char) 0, true),  //$NON-NLS-1$ //$NON-NLS-2$

    73         new MultiLineRule("/*", "*/", multilineCommentToken, (char) 0, true) //$NON-NLS-1$ //$NON-NLS-2$

    74     });

    75   }

    76 }