| /*=============================================================================# |
| # Copyright (c) 2014, 2021 Stephan Wahlbrink and others. |
| # |
| # This program and the accompanying materials are made available under the |
| # terms of the Eclipse Public License 2.0 which is available at |
| # https://www.eclipse.org/legal/epl-2.0, or the Apache License, Version 2.0 |
| # which is available at https://www.apache.org/licenses/LICENSE-2.0. |
| # |
| # SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 |
| # |
| # Contributors: |
| # Stephan Wahlbrink <sw@wahlbrink.eu> - initial API and implementation |
| #=============================================================================*/ |
| |
| package org.eclipse.statet.ltk.ui.sourceediting.assist; |
| |
| import static org.eclipse.statet.jcommons.lang.ObjectUtils.nonNullAssert; |
| |
| import java.util.IdentityHashMap; |
| import java.util.Map; |
| |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.contentassist.ICompletionProposal; |
| import org.eclipse.jface.text.quickassist.IQuickAssistInvocationContext; |
| import org.eclipse.jface.text.quickassist.IQuickAssistProcessor; |
| import org.eclipse.jface.text.source.Annotation; |
| import org.eclipse.jface.text.source.ISourceViewer; |
| |
| import org.eclipse.statet.jcommons.lang.NonNull; |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| |
| import org.eclipse.statet.ecommons.text.core.sections.DocContentSections; |
| |
| |
| /** |
| * Quick assist processor supporting separate implementations for each document content section |
| * type. |
| * |
| * Implement {@link #createProcessor(String)} for lazy initialization of the processors of the |
| * section types. |
| * |
| * @see DocContentSections |
| */ |
| @NonNullByDefault |
| public class MultiContentSectionQuickAssistProcessor |
| implements IQuickAssistProcessor, QuickAssistProcessorCommandExtension { |
| |
| |
| private static final Object NULL= new Object(); |
| |
| |
| private final DocContentSections sections; |
| |
| private final Map<String, Object> processors= new IdentityHashMap<>(8); |
| |
| private @Nullable String errorMessage; |
| |
| |
| public MultiContentSectionQuickAssistProcessor(final DocContentSections sections) { |
| this.sections= nonNullAssert(sections); |
| } |
| |
| |
| protected void registerProcessor(final String sectionType, final IQuickAssistProcessor processor) { |
| if (sectionType == null) { |
| throw new NullPointerException("sectionType"); //$NON-NLS-1$ |
| } |
| this.processors.put(sectionType, (processor != null) ? processor : NULL); |
| } |
| |
| protected final @Nullable IQuickAssistProcessor getProcessor(final String sectionType) { |
| if (sectionType == DocContentSections.ERROR) { |
| return null; |
| } |
| Object processor= this.processors.get(sectionType); |
| if (processor == null) { |
| processor= NULL; |
| try { |
| final IQuickAssistProcessor newProcessor= createProcessor(sectionType); |
| // newProcessor.init |
| if (newProcessor != null) { |
| processor= newProcessor; |
| } |
| } |
| finally { |
| this.processors.put(sectionType, processor); |
| } |
| } |
| return (processor != NULL) ? (IQuickAssistProcessor) processor : null; |
| } |
| |
| protected @Nullable IQuickAssistProcessor createProcessor(final String sectionType) { |
| return null; |
| } |
| |
| public @Nullable IQuickAssistProcessor getProcessor(final IQuickAssistInvocationContext invocationContext) { |
| final ISourceViewer sourceViewer= invocationContext.getSourceViewer(); |
| final IDocument document; |
| if (sourceViewer == null || (document= sourceViewer.getDocument()) == null) { |
| return null; |
| } |
| return getProcessor(this.sections.getType(document, invocationContext.getOffset())); |
| } |
| |
| |
| @Override |
| public boolean canFix(final Annotation annotation) { |
| return false; |
| } |
| |
| @Override |
| public boolean canAssist(final IQuickAssistInvocationContext invocationContext) { |
| return false; |
| } |
| |
| |
| @Override |
| public @NonNull ICompletionProposal @Nullable [] computeQuickAssistProposals( |
| final IQuickAssistInvocationContext invocationContext) { |
| this.errorMessage= null; |
| final IQuickAssistProcessor processor= getProcessor(invocationContext); |
| if (processor != null) { |
| try { |
| return processor.computeQuickAssistProposals(invocationContext); |
| } |
| finally { |
| this.errorMessage= processor.getErrorMessage(); |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public @Nullable String getErrorMessage() { |
| return this.errorMessage; |
| } |
| |
| |
| @Override |
| public @Nullable AssistProposal findQuickAssist( |
| final IQuickAssistInvocationContext invocationContext, |
| final String commandId) { |
| final IQuickAssistProcessor processor= getProcessor(invocationContext); |
| if (processor instanceof QuickAssistProcessorCommandExtension) { |
| return ((QuickAssistProcessorCommandExtension)processor) |
| .findQuickAssist(invocationContext, commandId); |
| } |
| return null; |
| } |
| |
| } |