| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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.dom.fragments; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jdt.core.IBuffer; |
| 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.SourceRange; |
| |
| /** |
| * This class houses a collection of static methods which do not refer to, |
| * or otherwise depend on, other classes in this package. Each |
| * package-visible method is called by more than one other class in this |
| * package. Since they do not depend on other classes in this package, |
| * they could be moved to some less specialized package. |
| */ |
| class Util { |
| static boolean rangeIncludesNonWhitespaceOutsideRange(SourceRange selection, SourceRange nodes, IBuffer buffer) { |
| if(!selection.covers(nodes)) |
| return false; |
| |
| //TODO: skip leading comments. Consider that leading line comment must be followed by newline! |
| if(!isJustWhitespace(selection.getOffset(), nodes.getOffset(), buffer)) |
| return true; |
| if(!isJustWhitespaceOrComment(nodes.getOffset() + nodes.getLength(), selection.getOffset() + selection.getLength(), buffer)) |
| return true; |
| return false; |
| } |
| private static boolean isJustWhitespace(int start, int end, IBuffer buffer) { |
| if (start == end) |
| return true; |
| Assert.isTrue(start <= end); |
| return 0 == buffer.getText(start, end - start).trim().length(); |
| } |
| private static boolean isJustWhitespaceOrComment(int start, int end, IBuffer buffer) { |
| if (start == end) |
| return true; |
| Assert.isTrue(start <= end); |
| String trimmedText= buffer.getText(start, end - start).trim(); |
| if (0 == trimmedText.length()) { |
| return true; |
| } else { |
| IScanner scanner= ToolFactory.createScanner(false, false, false, null); |
| scanner.setSource(trimmedText.toCharArray()); |
| try { |
| return scanner.getNextToken() == ITerminalSymbols.TokenNameEOF; |
| } catch (InvalidInputException e) { |
| return false; |
| } |
| } |
| } |
| } |