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/*******************************************************************************
* Copyright (c) 2000, 2012 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
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.text.spelling;
import java.util.HashMap;
import java.util.Map;
import org.eclipse.cdt.core.CCorePlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.ui.editors.text.EditorsUI;
import org.eclipse.ui.texteditor.spelling.ISpellingEngine;
import org.eclipse.ui.texteditor.spelling.ISpellingProblemCollector;
import org.eclipse.ui.texteditor.spelling.SpellingContext;
import org.eclipse.ui.texteditor.spelling.SpellingEngineDescriptor;
/**
* A dispatcher that decides what spelling engine to use depending on content type.
* When C/C++ spelling engine is selected in Preferences/General/Editors/Text Editors/Spelling
* this class is called to perform spelling check for all text-based content types.
* If the content type does not match one of C/C++ content types, the spelling check
* is delegated to the default spelling engine, most likely the one provided by JDT.
*/
public class SpellingEngineDispatcher implements ISpellingEngine {
private static final String C_SPELLING_ENGINE_ID = "org.eclipse.cdt.internal.ui.text.spelling.CSpellingEngine"; //$NON-NLS-1$
/** C/C++ source content type */
private static final IContentType CHEADER_CONTENT_TYPE = Platform.getContentTypeManager()
.getContentType(CCorePlugin.CONTENT_TYPE_CHEADER);
private static final IContentType CSOURCE_CONTENT_TYPE = Platform.getContentTypeManager()
.getContentType(CCorePlugin.CONTENT_TYPE_CSOURCE);
private static final IContentType CXXHEADER_CONTENT_TYPE = Platform.getContentTypeManager()
.getContentType(CCorePlugin.CONTENT_TYPE_CXXHEADER);
private static final IContentType CXXSOURCE_CONTENT_TYPE = Platform.getContentTypeManager()
.getContentType(CCorePlugin.CONTENT_TYPE_CXXSOURCE);
/** Available spelling engines by content type */
private Map<IContentType, SpellingEngine> fEngines = new HashMap<IContentType, SpellingEngine>();
private ISpellingEngine defaultEngine;
/**
* Initialize concrete engines.
*/
public SpellingEngineDispatcher() {
SpellingEngine engine = new CSpellingEngine();
if (CHEADER_CONTENT_TYPE != null)
fEngines.put(CHEADER_CONTENT_TYPE, engine);
if (CSOURCE_CONTENT_TYPE != null)
fEngines.put(CSOURCE_CONTENT_TYPE, engine);
if (CXXHEADER_CONTENT_TYPE != null)
fEngines.put(CXXHEADER_CONTENT_TYPE, engine);
if (CXXSOURCE_CONTENT_TYPE != null)
fEngines.put(CXXSOURCE_CONTENT_TYPE, engine);
try {
SpellingEngineDescriptor descriptor = EditorsUI.getSpellingService().getDefaultSpellingEngineDescriptor();
if (!C_SPELLING_ENGINE_ID.equals(descriptor.getId())) { // Do not delegate to itself.
defaultEngine = descriptor.createEngine();
}
} catch (CoreException e) {
}
}
/*
* @see org.eclipse.ui.texteditor.spelling.ISpellingEngine#check(org.eclipse.jface.text.IDocument, org.eclipse.jface.text.IRegion[], org.eclipse.ui.texteditor.spelling.SpellingContext, org.eclipse.ui.texteditor.spelling.ISpellingProblemCollector, org.eclipse.core.runtime.IProgressMonitor)
*/
@Override
public void check(IDocument document, IRegion[] regions, SpellingContext context,
ISpellingProblemCollector collector, IProgressMonitor monitor) {
ISpellingEngine engine = getEngine(context.getContentType());
if (engine == null)
engine = defaultEngine;
if (engine != null)
engine.check(document, regions, context, collector, monitor);
}
/**
* Returns a spelling engine for the given content type or
* <code>null</code> if none could be found.
*
* @param contentType the content type
* @return a spelling engine for the given content type or
* <code>null</code> if none could be found
*/
private ISpellingEngine getEngine(IContentType contentType) {
if (contentType == null)
return null;
if (fEngines.containsKey(contentType))
return fEngines.get(contentType);
return getEngine(contentType.getBaseType());
}
}
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