| /******************************************************************************* |
| * Copyright (c) 2000, 2022 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Joerg Kubitz - rewrite implementation |
| *******************************************************************************/ |
| package org.eclipse.core.filebuffers.manipulation; |
| |
| import java.util.Objects; |
| |
| import org.eclipse.core.internal.filebuffers.FileBuffersPlugin; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| |
| import org.eclipse.core.filebuffers.IFileBufferStatusCodes; |
| import org.eclipse.core.filebuffers.ITextFileBuffer; |
| |
| import org.eclipse.text.edits.ReplaceEdit; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.DocumentRewriteSessionType; |
| import org.eclipse.jface.text.IDocument; |
| |
| /** |
| * A text file buffer operation that changes the line delimiters to a specified line delimiter. |
| * |
| * @since 3.1 |
| */ |
| public class ConvertLineDelimitersOperation extends TextFileBufferOperation { |
| |
| private String fLineDelimiter; |
| |
| /** |
| * Creates a new line delimiter conversion operation for the given target delimiter. |
| * |
| * @param lineDelimiter the target line delimiter |
| */ |
| public ConvertLineDelimitersOperation(String lineDelimiter) { |
| super(FileBuffersMessages.ConvertLineDelimitersOperation_name); |
| fLineDelimiter= lineDelimiter; |
| } |
| |
| @Override |
| protected MultiTextEditWithProgress computeTextEdit(ITextFileBuffer fileBuffer, IProgressMonitor progressMonitor) throws CoreException { |
| IDocument document= fileBuffer.getDocument(); |
| int lineCount= document.getNumberOfLines(); |
| try { |
| String original= document.get(); |
| int newLengthGuess= original.length() + (fLineDelimiter.length() - 1) * lineCount; |
| StringBuilder sb= new StringBuilder(newLengthGuess); |
| for (int i= 0; i < lineCount; i++) { |
| int offset= document.getLineOffset(i); |
| int length= document.getLineLength(i); |
| String delim= document.getLineDelimiter(i); |
| sb.append(original, offset, offset + length - (delim == null ? 0 : delim.length())); |
| if (delim != null) { |
| sb.append(fLineDelimiter); |
| } |
| } |
| String replaced= sb.toString(); |
| MultiTextEditWithProgress multiEdit= new MultiTextEditWithProgress(FileBuffersMessages.ConvertLineDelimitersOperation_task_applyingChanges); |
| multiEdit.addChild(new ReplaceEdit(0, document.getLength(), replaced)); |
| return Objects.equals(replaced, original) ? null : multiEdit; |
| } catch (BadLocationException | IndexOutOfBoundsException x) { |
| throw new CoreException(new Status(IStatus.ERROR, FileBuffersPlugin.PLUGIN_ID, IFileBufferStatusCodes.CONTENT_CHANGE_FAILED, "", x)); //$NON-NLS-1$ |
| } |
| } |
| |
| @Override |
| protected DocumentRewriteSessionType getDocumentRewriteSessionType() { |
| return DocumentRewriteSessionType.SEQUENTIAL; |
| } |
| } |