| /******************************************************************************* |
| * Copyright (c) 2016, 2021 Red Hat Inc. 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: |
| * Mickael Istria (Red Hat Inc.) - Initial API and implementation |
| * Christoph Läubrich - Bug 508821 - [Content assist] More flexible API in IContentAssistProcessor to decide whether to auto-activate or not |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.genericeditor; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.contentassist.ICompletionProposal; |
| import org.eclipse.jface.text.contentassist.IContentAssistProcessor; |
| import org.eclipse.jface.text.contentassist.IContentAssistProcessorExtension; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| import org.eclipse.jface.text.contentassist.IContextInformationValidator; |
| |
| /** |
| * A content assist processor that delegates all content assist operations to |
| * children provided in constructor and aggregates the results. |
| * |
| * @since 1.0 |
| */ |
| public class CompositeContentAssistProcessor implements IContentAssistProcessorExtension, IContentAssistProcessor { |
| |
| private List<IContentAssistProcessor> fContentAssistProcessors; |
| |
| /** |
| * Constructor |
| * |
| * @param contentAssistProcessors the children that will actually populate the |
| * output of this content assist processor. |
| */ |
| public CompositeContentAssistProcessor(List<IContentAssistProcessor> contentAssistProcessors) { |
| fContentAssistProcessors = contentAssistProcessors; |
| } |
| |
| @Override |
| public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int offset) { |
| List<ICompletionProposal> res = new ArrayList<>(); |
| for (IContentAssistProcessor processor : this.fContentAssistProcessors) { |
| ICompletionProposal[] proposals = processor.computeCompletionProposals(viewer, offset); |
| if (proposals != null) { |
| res.addAll(Arrays.asList(proposals)); |
| } |
| } |
| return res.toArray(new ICompletionProposal[res.size()]); |
| } |
| |
| @Override |
| public IContextInformation[] computeContextInformation(ITextViewer viewer, int offset) { |
| List<IContextInformation> res = new ArrayList<>(); |
| for (IContentAssistProcessor processor : this.fContentAssistProcessors) { |
| IContextInformation[] contextInformation = processor.computeContextInformation(viewer, offset); |
| if (contextInformation != null) { |
| res.addAll(Arrays.asList(contextInformation)); |
| } |
| } |
| return res.toArray(new IContextInformation[res.size()]); |
| } |
| |
| @Override |
| public String getErrorMessage() { |
| StringBuilder res = new StringBuilder(); |
| for (IContentAssistProcessor processor : this.fContentAssistProcessors) { |
| String errorMessage = processor.getErrorMessage(); |
| if (errorMessage != null) { |
| res.append(errorMessage); |
| res.append('\n'); |
| } |
| } |
| if (res.length() == 0) { |
| return null; |
| } |
| return res.toString(); |
| } |
| |
| @Override |
| public IContextInformationValidator getContextInformationValidator() { |
| return null; |
| } |
| |
| @Override |
| public boolean isCompletionProposalAutoActivation(char c, ITextViewer viewer, int offset) { |
| for (IContentAssistProcessor processor : this.fContentAssistProcessors) { |
| IContentAssistProcessorExtension adapt = IContentAssistProcessorExtension.adapt(processor); |
| if (adapt.isCompletionProposalAutoActivation(c, viewer, offset)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| @Override |
| public boolean isContextInformationAutoActivation(char c, ITextViewer viewer, int offset) { |
| for (IContentAssistProcessor processor : this.fContentAssistProcessors) { |
| IContentAssistProcessorExtension adapt = IContentAssistProcessorExtension.adapt(processor); |
| if (adapt.isContextInformationAutoActivation(c, viewer, offset)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |