| /******************************************************************************* |
| * 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.ui.texteditor.spelling; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.ISafeRunnable; |
| import org.eclipse.core.runtime.SafeRunner; |
| |
| import org.eclipse.jface.preference.IPreferenceStore; |
| |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.Region; |
| |
| import org.eclipse.ui.internal.texteditor.TextEditorPlugin; |
| import org.eclipse.ui.internal.texteditor.spelling.SpellingEngineRegistry; |
| |
| /** |
| * System wide spelling service. |
| * <p> |
| * This class is not intended to be subclassed by clients. |
| * </p> |
| * |
| * @since 3.1 |
| * @noextend This class is not intended to be subclassed by clients. |
| */ |
| public class SpellingService { |
| |
| /** |
| * A named preference that controls if spelling is enabled or disabled. |
| * <p> |
| * Value is of type <code>Boolean</code>. |
| * </p> |
| */ |
| public static final String PREFERENCE_SPELLING_ENABLED= "spellingEnabled"; //$NON-NLS-1$ |
| |
| /** |
| * A named preference that controls which spelling engine is used. |
| * The value is the spelling engine's extension id. |
| * <p> |
| * Value is of type <code>String</code>. |
| * </p> |
| */ |
| public static final String PREFERENCE_SPELLING_ENGINE= "spellingEngine"; //$NON-NLS-1$ |
| |
| /** Preferences */ |
| private IPreferenceStore fPreferences; |
| |
| /** |
| * Initializes the spelling service with the given preferences. |
| * |
| * @param preferences the preferences |
| * @see SpellingService#PREFERENCE_SPELLING_ENABLED |
| * @see SpellingService#PREFERENCE_SPELLING_ENGINE |
| */ |
| public SpellingService(IPreferenceStore preferences) { |
| fPreferences= preferences; |
| } |
| |
| /** |
| * Checks the given document. Reports all found spelling problems to the |
| * collector. The spelling engine is chosen based on the settings |
| * from the given preferences. |
| * |
| * @param document the document to check |
| * @param context the context |
| * @param collector the problem collector |
| * @param monitor the progress monitor, can be <code>null</code> |
| */ |
| public void check(IDocument document, SpellingContext context, ISpellingProblemCollector collector, IProgressMonitor monitor) { |
| check(document, new IRegion[] { new Region(0, document.getLength()) }, context, collector, monitor); |
| } |
| |
| /** |
| * Checks the given regions in the given document. Reports all found |
| * spelling problems to the collector. The spelling engine is chosen |
| * based on the settings from the given preferences. |
| * |
| * @param document the document to check |
| * @param regions the regions to check |
| * @param context the context |
| * @param collector the problem collector |
| * @param monitor the progress monitor, can be <code>null</code> |
| */ |
| public void check(final IDocument document, final IRegion[] regions, final SpellingContext context, final ISpellingProblemCollector collector, final IProgressMonitor monitor) { |
| try { |
| collector.beginCollecting(); |
| if (fPreferences.getBoolean(PREFERENCE_SPELLING_ENABLED)) |
| try { |
| final ISpellingEngine engine= createEngine(fPreferences); |
| if (engine != null) { |
| ISafeRunnable runnable= new ISafeRunnable() { |
| @Override |
| public void run() throws Exception { |
| engine.check(document, regions, context, collector, monitor); |
| } |
| @Override |
| public void handleException(Throwable x) { |
| } |
| }; |
| SafeRunner.run(runnable); |
| } |
| } catch (CoreException x) { |
| TextEditorPlugin.getDefault().getLog().log(x.getStatus()); |
| } |
| } finally { |
| collector.endCollecting(); |
| } |
| } |
| |
| /** |
| * Returns all spelling engine descriptors from extensions to the |
| * spelling engine extension point. |
| * |
| * @return all spelling engine descriptors |
| */ |
| public SpellingEngineDescriptor[] getSpellingEngineDescriptors() { |
| SpellingEngineRegistry registry= getSpellingEngineRegistry(); |
| if (registry == null) |
| return new SpellingEngineDescriptor[0]; |
| return registry.getDescriptors(); |
| } |
| |
| /** |
| * Returns the default spelling engine descriptor from extensions to |
| * the spelling engine extension point. |
| * |
| * @return the default spelling engine descriptor or |
| * <code>null</code> if none could be found |
| */ |
| public SpellingEngineDescriptor getDefaultSpellingEngineDescriptor() { |
| SpellingEngineRegistry registry= getSpellingEngineRegistry(); |
| if (registry == null) |
| return null; |
| return registry.getDefaultDescriptor(); |
| } |
| |
| /** |
| * Returns the descriptor of the active spelling engine based on the |
| * value of the <code>PREFERENCE_SPELLING_ENGINE</code> preference |
| * in the given preferences. |
| * |
| * @param preferences the preferences |
| * @return the descriptor of the active spelling engine or |
| * <code>null</code> if none could be found |
| * @see SpellingService#PREFERENCE_SPELLING_ENGINE |
| */ |
| public SpellingEngineDescriptor getActiveSpellingEngineDescriptor(IPreferenceStore preferences) { |
| SpellingEngineRegistry registry= getSpellingEngineRegistry(); |
| if (registry == null) |
| return null; |
| |
| SpellingEngineDescriptor descriptor= null; |
| if (preferences.contains(PREFERENCE_SPELLING_ENGINE)) |
| descriptor= registry.getDescriptor(preferences.getString(PREFERENCE_SPELLING_ENGINE)); |
| if (descriptor == null) |
| descriptor= registry.getDefaultDescriptor(); |
| return descriptor; |
| } |
| |
| /** |
| * Creates a spelling engine based on the value of the |
| * <code>PREFERENCE_SPELLING_ENGINE</code> preference in the given |
| * preferences. |
| * |
| * @param preferences the preferences |
| * @return the created spelling engine or <code>null</code> if none |
| * could be created |
| * @throws CoreException if the creation failed |
| * @see SpellingService#PREFERENCE_SPELLING_ENGINE |
| */ |
| private ISpellingEngine createEngine(IPreferenceStore preferences) throws CoreException { |
| SpellingEngineDescriptor descriptor= getActiveSpellingEngineDescriptor(preferences); |
| if (descriptor != null) |
| return descriptor.createEngine(); |
| return null; |
| } |
| |
| /** |
| * Returns the spelling engine registry. |
| * |
| * @return the spelling engine registry or <code>null</code> if the plug-in has been shutdown |
| */ |
| private SpellingEngineRegistry getSpellingEngineRegistry() { |
| return TextEditorPlugin.getDefault().getSpellingEngineRegistry(); |
| } |
| } |