| /******************************************************************************* |
| * Copyright (c) 2000, 2008 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.corext.refactoring.util; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.ltk.core.refactoring.RefactoringStatus; |
| |
| import org.eclipse.jdt.core.ToolFactory; |
| import org.eclipse.jdt.core.compiler.IScanner; |
| import org.eclipse.jdt.core.compiler.ITerminalSymbols; |
| import org.eclipse.jdt.core.compiler.InvalidInputException; |
| |
| import org.eclipse.jdt.internal.corext.dom.Selection; |
| import org.eclipse.jdt.internal.corext.refactoring.RefactoringCoreMessages; |
| |
| public class CommentAnalyzer { |
| |
| private CommentAnalyzer() { |
| } |
| |
| public static RefactoringStatus perform(Selection selection, IScanner scanner, int start, int length) { |
| RefactoringStatus result= new RefactoringStatus(); |
| if (length <= 0) |
| return result; |
| new CommentAnalyzer().check(result, selection, scanner, start, start + length - 1); |
| return result; |
| } |
| |
| private void check(RefactoringStatus result, Selection selection, IScanner scanner, int start, int end) { |
| char[] characters= scanner.getSource(); |
| selection= adjustSelection(characters, selection, end); |
| scanner.resetTo(start, end); |
| |
| int token= 0; |
| try { |
| loop: while (token != ITerminalSymbols.TokenNameEOF) { |
| token= scanner.getNextToken(); |
| switch(token) { |
| case ITerminalSymbols.TokenNameCOMMENT_LINE: |
| case ITerminalSymbols.TokenNameCOMMENT_BLOCK: |
| case ITerminalSymbols.TokenNameCOMMENT_JAVADOC: |
| if (checkStart(scanner, selection.getOffset())) { |
| result.addFatalError(RefactoringCoreMessages.CommentAnalyzer_starts_inside_comment); |
| break loop; |
| } |
| if (checkEnd(scanner, selection.getInclusiveEnd())) { |
| result.addFatalError(RefactoringCoreMessages.CommentAnalyzer_ends_inside_comment); |
| break loop; |
| } |
| break; |
| } |
| } |
| } catch (InvalidInputException e) { |
| result.addFatalError(RefactoringCoreMessages.CommentAnalyzer_internal_error); |
| } |
| } |
| |
| private boolean checkStart(IScanner scanner, int position) { |
| return scanner.getCurrentTokenStartPosition() < position && position <= scanner.getCurrentTokenEndPosition(); |
| } |
| |
| private boolean checkEnd(IScanner scanner, int position) { |
| return scanner.getCurrentTokenStartPosition() <= position && position < scanner.getCurrentTokenEndPosition(); |
| } |
| |
| private Selection adjustSelection(char[] characters, Selection selection, int end) { |
| int newEnd= selection.getInclusiveEnd(); |
| for(int i= selection.getExclusiveEnd(); i <= end; i++) { |
| char ch= characters[i]; |
| if (ch != '\n' && ch != '\r') |
| break; |
| newEnd++; |
| } |
| return Selection.createFromStartEnd(selection.getOffset(), newEnd); |
| } |
| |
| /** |
| * Removes comments and whitespace |
| * @param reference the type reference |
| * @return the reference only consisting of dots and java identifier characters |
| */ |
| public static String normalizeReference(String reference) { |
| IScanner scanner= ToolFactory.createScanner(false, false, false, false); |
| scanner.setSource(reference.toCharArray()); |
| StringBuffer sb= new StringBuffer(); |
| try { |
| int tokenType= scanner.getNextToken(); |
| while (tokenType != ITerminalSymbols.TokenNameEOF) { |
| sb.append(scanner.getRawTokenSource()); |
| tokenType= scanner.getNextToken(); |
| } |
| } catch (InvalidInputException e) { |
| Assert.isTrue(false, reference); |
| } |
| reference= sb.toString(); |
| return reference; |
| } |
| } |