| /*=============================================================================# |
| # Copyright (c) 2008, 2019 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.internal.r.ui.editors; |
| |
| import org.eclipse.jface.text.AbstractDocument; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.BadPartitioningException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITypedRegion; |
| import org.eclipse.jface.text.templates.TemplateContextType; |
| |
| import org.eclipse.statet.jcommons.lang.NonNullByDefault; |
| import org.eclipse.statet.jcommons.lang.Nullable; |
| import org.eclipse.statet.jcommons.text.core.TextRegion; |
| |
| import org.eclipse.statet.internal.r.ui.RUIPlugin; |
| import org.eclipse.statet.ltk.ui.sourceediting.ISourceEditor; |
| import org.eclipse.statet.ltk.ui.sourceediting.assist.AssistInvocationContext; |
| import org.eclipse.statet.ltk.ui.sourceediting.assist.TemplateCompletionComputer; |
| import org.eclipse.statet.ltk.ui.templates.SourceEditorTemplateContext; |
| import org.eclipse.statet.r.core.source.IRDocumentConstants; |
| import org.eclipse.statet.r.ui.editors.templates.REditorContext; |
| import org.eclipse.statet.r.ui.editors.templates.REditorTemplateContextType; |
| |
| |
| @NonNullByDefault |
| public class REditorTemplateCompletionComputer extends TemplateCompletionComputer { |
| |
| |
| public REditorTemplateCompletionComputer() { |
| super(RUIPlugin.getInstance().getREditorTemplateStore(), |
| RUIPlugin.getInstance().getREditorTemplateContextRegistry() ); |
| } |
| |
| |
| @Override |
| protected @Nullable String extractPrefix(final AssistInvocationContext context) { |
| try { |
| final IDocument document= context.getSourceViewer().getDocument(); |
| final int end= context.getInvocationOffset(); |
| final int start= Math.max(end - 50, 0); |
| final String text= document.get(start, end-start); |
| int i= text.length() - 1; |
| while (i >= 0) { |
| final char c= text.charAt(i); |
| if (Character.isLetterOrDigit(c) || c == '.' || c == '_') { |
| i--; |
| continue; |
| } |
| if (c == '\\' || c == '@') { |
| return text.substring(i); |
| } |
| return text.substring(i + 1); |
| } |
| return ""; //$NON-NLS-1$ |
| } |
| catch (final BadLocationException e) { |
| return null; |
| } |
| } |
| |
| @Override |
| protected @Nullable TemplateContextType getContextType( |
| final AssistInvocationContext context, final TextRegion region) { |
| try { |
| final ISourceEditor editor= context.getEditor(); |
| final AbstractDocument document= (AbstractDocument) context.getSourceViewer().getDocument(); |
| final ITypedRegion partition= document.getPartition( |
| editor.getDocumentContentInfo().getPartitioning(), region.getStartOffset(), true ); |
| if (partition.getType() == IRDocumentConstants.R_ROXYGEN_CONTENT_TYPE) { |
| return getTypeRegistry().getContextType(REditorTemplateContextType.ROXYGEN_CONTEXTTYPE_ID); |
| } |
| else { |
| return getTypeRegistry().getContextType(REditorTemplateContextType.RCODE_CONTEXTTYPE_ID); |
| } |
| } |
| catch (final BadPartitioningException | BadLocationException e) {} |
| return null; |
| } |
| |
| @Override |
| protected @Nullable SourceEditorTemplateContext createTemplateContext( |
| final AssistInvocationContext context, final TextRegion region, |
| final int flags) { |
| final TemplateContextType contextType= getContextType(context, region); |
| if (contextType != null) { |
| return new REditorContext(contextType, context.getDocument(), region, |
| context.getEditor(), flags ); |
| } |
| return null; |
| } |
| |
| } |