| /******************************************************************************* |
| * Copyright (c) 2017 Red Hat Inc. and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Mickael Istria (Red Hat Inc.) - initial implementation |
| *******************************************************************************/ |
| package org.eclipse.ui.internal.genericeditor.markers; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.resources.IMarker; |
| import org.eclipse.jface.text.IInformationControlCreator; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextHover; |
| import org.eclipse.jface.text.ITextHoverExtension; |
| import org.eclipse.jface.text.ITextHoverExtension2; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.Position; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.jface.text.source.Annotation; |
| import org.eclipse.jface.text.source.IAnnotationModel; |
| import org.eclipse.jface.text.source.ISourceViewerExtension2; |
| import org.eclipse.ui.editors.text.EditorsUI; |
| import org.eclipse.ui.texteditor.AnnotationPreference; |
| import org.eclipse.ui.texteditor.MarkerAnnotation; |
| |
| public class MarkerAnnotationHover implements ITextHoverExtension, ITextHoverExtension2, ITextHover { |
| |
| protected static boolean isIncluded(Annotation annotation) { |
| if (!(annotation instanceof MarkerAnnotation)) { |
| return false; |
| } |
| AnnotationPreference preference= EditorsUI.getAnnotationPreferenceLookup().getAnnotationPreference(annotation); |
| if (preference == null) { |
| return false; |
| } |
| String key= preference.getTextPreferenceKey(); |
| if (key != null) { |
| if (!EditorsUI.getPreferenceStore().getBoolean(key)) |
| return false; |
| } else { |
| key= preference.getHighlightPreferenceKey(); |
| if (key == null || !EditorsUI.getPreferenceStore().getBoolean(key)) |
| return false; |
| } |
| return true; |
| } |
| |
| |
| @Override |
| public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) { |
| Object hoverInfo = getHoverInfo2(textViewer, hoverRegion); |
| if (hoverInfo == null) { |
| return null; |
| } |
| return hoverInfo.toString(); |
| } |
| |
| @Override |
| public IRegion getHoverRegion(ITextViewer textViewer, int offset) { |
| if (!(textViewer instanceof ISourceViewerExtension2)) { |
| return null; |
| } |
| ISourceViewerExtension2 viewer = (ISourceViewerExtension2)textViewer; |
| List<MarkerAnnotation> annotations = findMarkerAnnotations(viewer, new Region(offset, 0)); |
| if (annotations.isEmpty()) { |
| return null; |
| } |
| // find intersection of regions |
| int highestOffsetStart = 0; |
| int lowestOffsetEnd = Integer.MAX_VALUE; |
| IAnnotationModel annotationModel = viewer.getVisualAnnotationModel(); |
| for (Annotation annotation : annotations) { |
| Position position = annotationModel.getPosition(annotation); |
| highestOffsetStart = Math.max(highestOffsetStart, position.getOffset()); |
| lowestOffsetEnd = Math.min(lowestOffsetEnd, position.getOffset() + position.getLength()); |
| } |
| return new Region(highestOffsetStart, Math.max(0, lowestOffsetEnd - highestOffsetStart)); |
| } |
| |
| @Override |
| public List<IMarker> getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) { |
| if (!(textViewer instanceof ISourceViewerExtension2)) { |
| return null; |
| } |
| List<MarkerAnnotation> annotations = findMarkerAnnotations((ISourceViewerExtension2)textViewer, hoverRegion); |
| if (annotations.isEmpty()) { |
| return null; |
| } |
| List<IMarker> markers = new ArrayList<>(annotations.size()); |
| for (MarkerAnnotation annotation : annotations) { |
| markers.add(annotation.getMarker()); |
| } |
| return markers; |
| } |
| |
| private static List<MarkerAnnotation> findMarkerAnnotations(ISourceViewerExtension2 viewer, IRegion region) { |
| List<MarkerAnnotation> res = new ArrayList<>(); |
| IAnnotationModel annotationModel = viewer.getVisualAnnotationModel(); |
| annotationModel.getAnnotationIterator().forEachRemaining(annotation -> { |
| if (isIncluded(annotation)) { |
| Position position = annotationModel.getPosition(annotation); |
| if (region.getOffset() >= position.getOffset() && region.getOffset() + region.getLength() <= position.getOffset() + position.getLength()) { |
| res.add((MarkerAnnotation)annotation); |
| } |
| } |
| }); |
| return res; |
| } |
| |
| @Override |
| public IInformationControlCreator getHoverControlCreator() { |
| return new MarkerHoverControlCreator(); |
| } |
| |
| } |