| /******************************************************************************* |
| * Copyright (c) 2000, 2010 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 |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.editors.text; |
| |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.expressions.IEvaluationContext; |
| |
| import org.eclipse.core.runtime.IPath; |
| |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.resources.IResource; |
| |
| import org.eclipse.core.filebuffers.FileBuffers; |
| import org.eclipse.core.filebuffers.ITextFileBufferManager; |
| import org.eclipse.core.filebuffers.manipulation.RemoveTrailingWhitespaceOperation; |
| |
| import org.eclipse.jface.window.Window; |
| |
| import org.eclipse.jface.text.ITextSelection; |
| |
| import org.eclipse.ui.ISources; |
| import org.eclipse.ui.internal.editors.text.SelectResourcesDialog.IFilter; |
| |
| import org.eclipse.ui.editors.text.FileBufferOperationHandler; |
| |
| |
| /** |
| * A file buffer operation action that removes trailing whitespace. |
| * |
| * @since 3.1 |
| */ |
| public class RemoveTrailingWhitespaceHandler extends FileBufferOperationHandler { |
| |
| /** @since 3.7 */ |
| private boolean fStrictCheckIfTextLocation= true; |
| |
| |
| public RemoveTrailingWhitespaceHandler() { |
| super(new RemoveTrailingWhitespaceOperation()); |
| } |
| |
| @Override |
| protected boolean isAcceptableLocation(IPath location) { |
| ITextFileBufferManager manager= FileBuffers.getTextFileBufferManager(); |
| return location != null && manager.isTextFileLocation(location, fStrictCheckIfTextLocation); |
| } |
| |
| @Override |
| protected IFile[] collectFiles(IResource[] resources) { |
| IFile[] files= super.collectFiles(resources); |
| files= filterUnacceptableFiles(files); |
| if (containsOnlyFiles(resources)) |
| return files; |
| |
| final IFilter filter= new IFilter() { |
| @Override |
| public boolean accept(IResource resource) { |
| return resource != null && isAcceptableLocation(resource.getFullPath()); |
| } |
| }; |
| |
| SelectResourcesDialog dialog= new SelectResourcesDialog(getShell(), TextEditorMessages.RemoveTrailingWhitespaceHandler_dialog_title, TextEditorMessages.RemoveTrailingWhitespaceHandler_dialog_description, filter); |
| dialog.setInput(resources); |
| int result= dialog.open(); |
| if (Window.OK == result) { |
| IResource[] selectedResources= dialog.getSelectedResources(); |
| return super.collectFiles(selectedResources); |
| } |
| return null; |
| } |
| |
| /** |
| * Checks whether the given resources array contains |
| * only files. |
| * |
| * @param resources the array with the resources |
| * @return <code>true</code> if there array only contains <code>IFiles</code>s |
| * @since 3.2 |
| */ |
| private boolean containsOnlyFiles(IResource[] resources) { |
| for (int i= 0; i < resources.length; i++) { |
| IResource resource= resources[i]; |
| if ((IResource.FILE & resource.getType()) == 0) |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * Filters the unacceptable files. |
| * |
| * @param files the files to filter |
| * @return an array of files |
| * @since 3.2 |
| */ |
| private IFile[] filterUnacceptableFiles(IFile[] files) { |
| Set<IFile> filtered= new HashSet<>(); |
| for (int i= 0; i < files.length; i++) { |
| IFile file= files[i]; |
| if (isAcceptableLocation(file.getFullPath())) |
| filtered.add(file); |
| } |
| return filtered.toArray(new IFile[filtered.size()]); |
| } |
| |
| @Override |
| public void setEnabled(Object evaluationContext) { |
| fStrictCheckIfTextLocation= true; |
| if (evaluationContext instanceof IEvaluationContext) { |
| Object selection= ((IEvaluationContext)evaluationContext).getVariable(ISources.ACTIVE_CURRENT_SELECTION_NAME); |
| fStrictCheckIfTextLocation= !(selection instanceof ITextSelection); |
| } |
| super.setEnabled(evaluationContext); |
| } |
| } |