| /******************************************************************************* |
| * Copyright (c) 2004, 2018 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; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.IllegalCharsetNameException; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| import org.eclipse.core.runtime.Platform; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.ui.internal.WorkbenchMessages; |
| import org.eclipse.ui.internal.WorkbenchPlugin; |
| import org.eclipse.ui.internal.registry.IWorkbenchRegistryConstants; |
| import org.eclipse.ui.internal.registry.RegistryReader; |
| |
| /** |
| * WorkbenchEncoding is a utility class for plug-ins that want to use the list |
| * of encodings defined by default in the workbench. |
| * |
| * @since 3.1 |
| */ |
| public class WorkbenchEncoding { |
| |
| private static class EncodingsRegistryReader extends RegistryReader { |
| |
| private List<String> encodings; |
| |
| /** |
| * Create a new instance of the receiver. |
| * |
| * @param definedEncodings the list of encodings |
| */ |
| public EncodingsRegistryReader(List<String> definedEncodings) { |
| super(); |
| encodings = definedEncodings; |
| } |
| |
| @Override |
| protected boolean readElement(IConfigurationElement element) { |
| String name = element.getAttribute(IWorkbenchRegistryConstants.ATT_NAME); |
| if (name != null) { |
| encodings.add(name); |
| } |
| return true; |
| } |
| } |
| |
| /** |
| * Get the default encoding from the virtual machine. |
| * |
| * @return String |
| */ |
| public static String getWorkbenchDefaultEncoding() { |
| return System.getProperty("file.encoding", "UTF-8");//$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| |
| /** |
| * Return the list of encodings defined using the org.eclipse.ui.encodings |
| * extension point. |
| * |
| * @return List of String |
| */ |
| public static List<String> getDefinedEncodings() { |
| List<String> definedEncodings = Collections.synchronizedList(new ArrayList<>()); |
| EncodingsRegistryReader reader = new EncodingsRegistryReader(definedEncodings); |
| |
| reader.readRegistry(Platform.getExtensionRegistry(), PlatformUI.PLUGIN_ID, |
| IWorkbenchRegistryConstants.PL_ENCODINGS); |
| |
| // Make it an array in case of concurrency issues with Iterators |
| String[] encodings = new String[definedEncodings.size()]; |
| List<String> invalid = new ArrayList<>(); |
| definedEncodings.toArray(encodings); |
| for (String encoding : encodings) { |
| try { |
| if (!Charset.isSupported(encoding)) { |
| invalid.add(encoding); |
| } |
| } catch (IllegalCharsetNameException e) { |
| invalid.add(encoding); |
| } |
| } |
| |
| for (String next : invalid) { |
| WorkbenchPlugin.log(NLS.bind(WorkbenchMessages.WorkbenchEncoding_invalidCharset, next)); |
| definedEncodings.remove(next); |
| |
| } |
| |
| return definedEncodings; |
| } |
| } |