| /*=============================================================================# |
| # Copyright (c) 2010, 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.internal.r.ui.editors; |
| |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.ITypedRegion; |
| import org.eclipse.jface.text.Region; |
| |
| import org.eclipse.statet.ltk.ui.sourceediting.EditorTextInfoHoverProxy; |
| import org.eclipse.statet.ltk.ui.sourceediting.SourceEditorViewerConfiguration; |
| import org.eclipse.statet.ltk.ui.sourceediting.assist.AssistInvocationContext; |
| import org.eclipse.statet.ltk.ui.sourceediting.assist.InfoHoverDescriptor; |
| import org.eclipse.statet.r.core.source.RDocumentConstants; |
| import org.eclipse.statet.r.core.source.RHeuristicTokenScanner; |
| import org.eclipse.statet.r.ui.editors.IRSourceEditor; |
| import org.eclipse.statet.r.ui.sourceediting.RAssistInvocationContext; |
| |
| |
| public class REditorTextHover extends EditorTextInfoHoverProxy { |
| |
| |
| private RHeuristicTokenScanner scanner; |
| |
| |
| public REditorTextHover(final IRSourceEditor editor, |
| final InfoHoverDescriptor descriptor, final SourceEditorViewerConfiguration config) { |
| super(descriptor, config); |
| } |
| |
| |
| @Override |
| public IRegion getHoverRegion(final ITextViewer textViewer, final int offset) { |
| if (this.scanner == null) { |
| this.scanner= RHeuristicTokenScanner.create(getEditor().getDocumentContentInfo()); |
| } |
| try { |
| final IDocument document= getEditor().getViewer().getDocument(); |
| this.scanner.configure(document); |
| final IRegion word= this.scanner.findRWord(offset, false, true); |
| if (word != null) { |
| final ITypedRegion partition= this.scanner.getPartition(word.getOffset()); |
| if (RDocumentConstants.R_DEFAULT_CONTENT_CONSTRAINT.matches(partition.getType()) |
| || partition.getType() == RDocumentConstants.R_STRING_CONTENT_TYPE |
| || partition.getType() == RDocumentConstants.R_QUOTED_SYMBOL_CONTENT_TYPE) { |
| return word; |
| } |
| } |
| final char c= document.getChar(offset); |
| if (c == '[') { |
| final ITypedRegion partition= this.scanner.getPartition(offset); |
| if (RDocumentConstants.R_DEFAULT_CONTENT_CONSTRAINT.matches(partition.getType())) { |
| return new Region(offset, 1); |
| } |
| } |
| } |
| catch (final Exception e) { |
| } |
| return null; |
| } |
| |
| @Override |
| protected AssistInvocationContext createContext(final IRegion region, final String contentType, |
| final IProgressMonitor monitor) { |
| // we are not in UI thread |
| final RAssistInvocationContext context= new RAssistInvocationContext( |
| (IRSourceEditor) getEditor(), region, contentType, this.scanner, monitor ); |
| if (context.getAstInfo() == null) { |
| return null; |
| } |
| return context; |
| } |
| |
| } |