| /******************************************************************************* |
| * Copyright (c) 2004, 2005 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.ui.ide; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.IllegalCharsetNameException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| import org.eclipse.core.resources.ResourcesPlugin; |
| 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.runtime.content.IContentDescription; |
| import org.eclipse.core.runtime.jobs.Job; |
| import org.eclipse.osgi.util.NLS; |
| import org.eclipse.ui.PlatformUI; |
| import org.eclipse.ui.WorkbenchEncoding; |
| import org.eclipse.ui.internal.WorkbenchPlugin; |
| import org.eclipse.ui.internal.ide.IDEWorkbenchMessages; |
| import org.eclipse.ui.internal.ide.IDEWorkbenchPlugin; |
| |
| /** |
| * IDEEncoding is a utility class for managing encoding information that |
| * includes user preferences from the IDE and core resources. |
| * <p> |
| * This class provides all its functionality via static methods. |
| * It is not intended to be instantiated or subclassed. |
| * </p> |
| * |
| * @see org.eclipse.ui.WorkbenchEncoding |
| * @see org.eclipse.core.resources.ResourcesPlugin |
| * @since 3.1 |
| */ |
| public final class IDEEncoding { |
| |
| private IDEEncoding () { |
| // prevent instantiation |
| } |
| |
| //The preference for the user entered encodings. |
| private static String IDE_ENCODINGS_PREFERENCE = "IDE_ENCODINGS_PREFERENCE"; //$NON-NLS-1$ |
| |
| private static String PREFERENCE_SEPARATOR = "'"; //$NON-NLS-1$ |
| |
| /** |
| * Display constant for the UTF 8 byte order marker for resources. |
| */ |
| public static String BOM_UTF_8 = "UTF-8 (BOM)";//$NON-NLS-1$ |
| |
| /** |
| * Display constant for the UTF 16 big endian byte order marker for |
| * resources. |
| */ |
| public static String BOM_UTF_16BE = "UTF-16 Big-Endian (BOM)";//$NON-NLS-1$ |
| |
| /** |
| * Display constant for the UTF 16 little endian byte order marker for |
| * resources. |
| */ |
| public static String BOM_UTF_16LE = "UTF-16 Little-Endian (BOM)";//$NON-NLS-1$ |
| |
| /** |
| * Get all of the available encodings including any that were saved as a |
| * preference in the IDE or in core resources. |
| * |
| * @return List of String |
| */ |
| public static List getIDEEncodings() { |
| List encodings = getIDEEncodingsPreference(); |
| encodings.addAll(WorkbenchEncoding.getDefinedEncodings()); |
| |
| String enc = getResourceEncoding(); |
| |
| if (!(enc == null || encodings.contains(enc))) |
| encodings.add(enc); |
| |
| Collections.sort(encodings); |
| return encodings; |
| } |
| |
| /** |
| * Get the current value of the encoding preference. If the value is not set |
| * return <code>null</code>. |
| * |
| * @return String |
| */ |
| public static String getResourceEncoding() { |
| String preference = ResourcesPlugin.getPlugin().getPluginPreferences().getString( |
| ResourcesPlugin.PREF_ENCODING); |
| if (preference == null || preference.length() == 0) |
| return null; |
| return preference; |
| } |
| |
| /** |
| * Set the resource encoding to be value. Add the encoding to the list of |
| * encodings stored by the workbench. |
| * |
| * @param value |
| * String or <code>null</code> if the preference is to be reset |
| * to the default. |
| * @deprecated Use IWorkspaceRoot#setDefaultCharset and |
| * add the encoding using #addEncoding. |
| * This API will be deleted before 3.1 M3. |
| */ |
| public static void setResourceEncoding(String value) { |
| |
| if (value != null) |
| addIDEEncoding(value); |
| |
| final String finalValue = value; |
| Job charsetJob = new Job(IDEWorkbenchMessages.IDEEncoding_EncodingJob) { |
| /* (non-Javadoc) |
| * @see org.eclipse.core.runtime.jobs.Job#run(org.eclipse.core.runtime.IProgressMonitor) |
| */ |
| protected IStatus run(IProgressMonitor monitor) { |
| try { |
| ResourcesPlugin.getWorkspace().getRoot().setDefaultCharset(finalValue, monitor); |
| } catch (CoreException exception) { |
| return exception.getStatus(); |
| } |
| return Status.OK_STATUS; |
| |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.core.runtime.jobs.Job#shouldRun() |
| */ |
| public boolean shouldRun() { |
| //Do not run after shutdown |
| return PlatformUI.isWorkbenchRunning(); |
| } |
| }; |
| charsetJob.schedule(); |
| |
| } |
| |
| /** |
| * Add value to the list of workbench encodings. |
| * |
| * @param value |
| */ |
| public static void addIDEEncoding(String value) { |
| |
| if (WorkbenchEncoding.getDefinedEncodings().contains(value)) |
| return; |
| |
| writeEncodingsPreference(value, getIDEEncodingsPreference()); |
| |
| } |
| |
| /** |
| * Write the encodings preference. If value is not null |
| * and not already in the list of currentEncodings add |
| * it to the list. |
| * @param value String or <code>null</code> |
| * @param encodings The list of encodings to write |
| */ |
| private static void writeEncodingsPreference(String value, Collection encodings) { |
| boolean addValue = (value != null); |
| |
| StringBuffer result = new StringBuffer(); |
| |
| Iterator currentEncodings = encodings.iterator(); |
| |
| while (currentEncodings.hasNext()) { |
| String string = (String) currentEncodings.next(); |
| result.append(string); |
| result.append(PREFERENCE_SEPARATOR); |
| if (addValue && string.equals(value))//If we still think we are going to add it check first |
| addValue = false; |
| } |
| |
| if (addValue) |
| result.append(value); |
| |
| IDEWorkbenchPlugin.getDefault().getPreferenceStore().setValue(IDE_ENCODINGS_PREFERENCE, |
| result.toString()); |
| } |
| |
| /** |
| * Get the value of the encodings preference. |
| * |
| * @return List |
| */ |
| private static List getIDEEncodingsPreference() { |
| |
| boolean updateRequired = false; |
| |
| String encodings = IDEWorkbenchPlugin.getDefault().getPreferenceStore().getString( |
| IDE_ENCODINGS_PREFERENCE); |
| |
| if (encodings == null || encodings.length() == 0) |
| return new ArrayList(); |
| |
| String[] preferenceEncodings = encodings.split(PREFERENCE_SEPARATOR); |
| ArrayList result = new ArrayList(); |
| |
| //Drop any encodings that are not valid |
| for (int i = 0; i < preferenceEncodings.length; i++) { |
| String string = preferenceEncodings[i]; |
| boolean isSupported; |
| try { |
| isSupported = Charset.isSupported(string); |
| } catch (IllegalCharsetNameException e) { |
| isSupported = false; |
| } |
| if (isSupported) |
| result.add(string); |
| else{ |
| WorkbenchPlugin.log(NLS.bind(IDEWorkbenchMessages.WorkbenchEncoding_invalidCharset, string)); |
| updateRequired = true; |
| } |
| |
| } |
| |
| if(updateRequired)//If we logged a problem then clear the preference |
| writeEncodingsPreference(null, result); |
| return result; |
| |
| } |
| |
| /** |
| * Clear the IDE encodings preference. |
| */ |
| public static void clearUserEncodings() { |
| IDEWorkbenchPlugin.getDefault().getPreferenceStore().setToDefault(IDE_ENCODINGS_PREFERENCE); |
| } |
| |
| /** |
| * Get the displayable string for the byte order marking from the supplied |
| * file description. |
| * |
| * @param description |
| * The description to query. May be <code>null</code>. |
| * @return String or <code>null</code> if the byte order mark cannot be |
| * found or the description is <code>null</code>. |
| * @see IContentDescription#getProperty(org.eclipse.core.runtime.QualifiedName) |
| */ |
| public static String getByteOrderMarkLabel(IContentDescription description) { |
| |
| if (description == null) |
| return null; |
| |
| byte[] bom = (byte[]) description.getProperty(IContentDescription.BYTE_ORDER_MARK); |
| if (bom == null) |
| return null; |
| if (bom == IContentDescription.BOM_UTF_8) |
| return IDEEncoding.BOM_UTF_8; |
| if (bom == IContentDescription.BOM_UTF_16BE) |
| return IDEEncoding.BOM_UTF_16BE; |
| if (bom == IContentDescription.BOM_UTF_16LE) |
| return IDEEncoding.BOM_UTF_16LE; |
| |
| return null; |
| } |
| |
| } |