| /******************************************************************************* |
| * 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.core.filebuffers.manipulation; |
| |
| import org.eclipse.core.internal.filebuffers.FileBuffersPlugin; |
| import org.eclipse.core.internal.filebuffers.Progress; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.OperationCanceledException; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.eclipse.core.filebuffers.IFileBufferStatusCodes; |
| import org.eclipse.core.filebuffers.ITextFileBuffer; |
| |
| import org.eclipse.text.edits.DeleteEdit; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.DocumentRewriteSessionType; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| |
| /** |
| * A text file buffer operation that removes all trailing whitespace. |
| * |
| * @since 3.1 |
| */ |
| public class RemoveTrailingWhitespaceOperation extends TextFileBufferOperation { |
| |
| /** |
| * Creates a remove trailing whitespace operation. |
| */ |
| public RemoveTrailingWhitespaceOperation() { |
| super(FileBuffersMessages.RemoveTrailingWhitespaceOperation_name); |
| } |
| |
| @Override |
| protected MultiTextEditWithProgress computeTextEdit(ITextFileBuffer fileBuffer, IProgressMonitor progressMonitor) throws CoreException { |
| IDocument document= fileBuffer.getDocument(); |
| int lineCount= document.getNumberOfLines(); |
| |
| progressMonitor= Progress.getMonitor(progressMonitor); |
| progressMonitor.beginTask(FileBuffersMessages.RemoveTrailingWhitespaceOperation_task_generatingChanges, lineCount); |
| try { |
| |
| MultiTextEditWithProgress multiEdit= new MultiTextEditWithProgress(FileBuffersMessages.RemoveTrailingWhitespaceOperation_task_applyingChanges); |
| |
| for (int i= 0; i < lineCount; i++) { |
| if (progressMonitor.isCanceled()) |
| throw new OperationCanceledException(); |
| |
| IRegion region= document.getLineInformation(i); |
| if (region.getLength() == 0) |
| continue; |
| |
| int lineStart= region.getOffset(); |
| int lineExclusiveEnd= lineStart + region.getLength(); |
| int j= lineExclusiveEnd -1; |
| while (j >= lineStart && Character.isWhitespace(document.getChar(j))) --j; |
| ++j; |
| if (j < lineExclusiveEnd) |
| multiEdit.addChild(new DeleteEdit(j, lineExclusiveEnd - j)); |
| progressMonitor.worked(1); |
| } |
| |
| return multiEdit.getChildrenSize() <= 0 ? null : multiEdit; |
| |
| } catch (BadLocationException x) { |
| throw new CoreException(new Status(IStatus.ERROR, FileBuffersPlugin.PLUGIN_ID, IFileBufferStatusCodes.CONTENT_CHANGE_FAILED, "", x)); //$NON-NLS-1$ |
| } finally { |
| progressMonitor.done(); |
| } |
| } |
| |
| @Override |
| protected DocumentRewriteSessionType getDocumentRewriteSessionType() { |
| return DocumentRewriteSessionType.SEQUENTIAL; |
| } |
| } |