| /******************************************************************************* |
| * Copyright (c) 2018, 2019 Angelo Zerr 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: |
| * - Angelo Zerr: initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.javaeditor.codemining; |
| |
| import java.text.MessageFormat; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.atomic.AtomicLong; |
| import java.util.function.Consumer; |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.events.MouseEvent; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| |
| import org.eclipse.core.resources.ResourcesPlugin; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.codemining.ICodeMiningProvider; |
| |
| import org.eclipse.ui.IEditorPart; |
| |
| import org.eclipse.ui.texteditor.ITextEditor; |
| |
| import org.eclipse.search.ui.NewSearchUI; |
| |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IJavaProject; |
| import org.eclipse.jdt.core.JavaCore; |
| import org.eclipse.jdt.core.JavaModelException; |
| import org.eclipse.jdt.core.search.IJavaSearchConstants; |
| import org.eclipse.jdt.core.search.IJavaSearchScope; |
| import org.eclipse.jdt.core.search.SearchEngine; |
| import org.eclipse.jdt.core.search.SearchMatch; |
| import org.eclipse.jdt.core.search.SearchParticipant; |
| import org.eclipse.jdt.core.search.SearchPattern; |
| import org.eclipse.jdt.core.search.SearchRequestor; |
| |
| import org.eclipse.jdt.ui.actions.FindReferencesAction; |
| |
| import org.eclipse.jdt.internal.ui.javaeditor.EditorUtility; |
| import org.eclipse.jdt.internal.ui.javaeditor.JavaEditor; |
| import org.eclipse.jdt.internal.ui.search.JavaSearchScopeFactory; |
| |
| /** |
| * Java reference code mining. |
| * |
| * @since 3.16 |
| */ |
| public class JavaReferenceCodeMining extends AbstractJavaElementLineHeaderCodeMining { |
| |
| private final JavaEditor editor; |
| |
| private final boolean showReferencesAtLeastOne; |
| |
| private Consumer<MouseEvent> action; |
| |
| public JavaReferenceCodeMining(IJavaElement element, JavaEditor editor, IDocument document, |
| ICodeMiningProvider provider, boolean showReferencesAtLeastOne) |
| throws JavaModelException, BadLocationException { |
| super(element, document, provider, null); |
| this.editor= editor; |
| this.showReferencesAtLeastOne= showReferencesAtLeastOne; |
| } |
| |
| @SuppressWarnings("boxing") |
| @Override |
| protected CompletableFuture<Void> doResolve(ITextViewer viewer, IProgressMonitor monitor) { |
| return CompletableFuture.runAsync(() -> { |
| try { |
| monitor.isCanceled(); |
| IJavaElement element= super.getElement(); |
| long refCount= countReferences(element, monitor); |
| monitor.isCanceled(); |
| action= refCount > 0 ? e -> { |
| if (refCount == 1 && (e.stateMask & SWT.CTRL) == SWT.CTRL) { |
| // Ctrl + Click is done, open the referenced element in the Java Editor |
| try { |
| SearchMatch match= getReferenceMatch(element, monitor); |
| IJavaElement javaElement= (IJavaElement) match.getElement(); |
| IEditorPart part= EditorUtility.openInEditor(javaElement); |
| if (part != null) { |
| EditorUtility.revealInEditor(part, javaElement); |
| if (part instanceof ITextEditor) { |
| ITextEditor textEditor= (ITextEditor) part; |
| textEditor.selectAndReveal(match.getOffset(), match.getLength()); |
| } |
| } |
| } catch (JavaModelException e1) { |
| // Should never occur |
| } catch (CoreException e1) { |
| // Should never occur |
| } |
| } else { |
| // Otherwise, launch references search |
| new FindReferencesAction(editor).run(element); |
| } |
| } : null; |
| if (refCount == 0 && showReferencesAtLeastOne) { |
| super.setLabel(""); //$NON-NLS-1$ |
| } else { |
| super.setLabel(MessageFormat.format(JavaCodeMiningMessages.JavaReferenceCodeMining_label, refCount)); |
| } |
| } catch (CoreException e) { |
| // Should never occur |
| } |
| }); |
| } |
| |
| @Override |
| public Consumer<MouseEvent> getAction() { |
| return action; |
| } |
| |
| /** |
| * Return the number of references for the given java element. |
| * |
| * @param element the java element. |
| * @param monitor the monitor |
| * @return he number of references for the given java element. |
| * @throws JavaModelException throws when java error. |
| * @throws CoreException throws when java error. |
| */ |
| private static long countReferences(IJavaElement element, IProgressMonitor monitor) |
| throws JavaModelException, CoreException { |
| if (element == null) { |
| return 0; |
| } |
| final AtomicLong count= new AtomicLong(0); |
| SearchPattern pattern= SearchPattern.createPattern(element, IJavaSearchConstants.REFERENCES); |
| SearchEngine engine= new SearchEngine(); |
| final boolean ignoreInaccurate= NewSearchUI.arePotentialMatchesIgnored(); |
| engine.search(pattern, new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() }, |
| createSearchScope(element), new SearchRequestor() { |
| |
| @Override |
| public void acceptSearchMatch(SearchMatch match) throws CoreException { |
| if (match.getAccuracy() == SearchMatch.A_INACCURATE && ignoreInaccurate) { |
| return; |
| } |
| Object o= match.getElement(); |
| if (o instanceof IJavaElement) { |
| IJavaElement e= (IJavaElement)o; |
| if (e.getAncestor(IJavaElement.COMPILATION_UNIT) != null |
| || e.getAncestor(IJavaElement.CLASS_FILE) != null) { |
| count.incrementAndGet(); |
| } |
| } |
| } |
| }, monitor); |
| |
| return count.get(); |
| } |
| |
| /** |
| * Return the single search match of references for the given java element. |
| * |
| * @param element the java element. |
| * @param monitor the monitor |
| * @return he number of references for the given java element. |
| * @throws JavaModelException throws when java error. |
| * @throws CoreException throws when java error. |
| */ |
| private SearchMatch getReferenceMatch(IJavaElement element, IProgressMonitor monitor) |
| throws JavaModelException, CoreException { |
| if (element == null) { |
| return null; |
| } |
| final SearchMatch[] matches= new SearchMatch[1]; |
| SearchPattern pattern= SearchPattern.createPattern(element, IJavaSearchConstants.REFERENCES); |
| SearchEngine engine= new SearchEngine(); |
| engine.search(pattern, new SearchParticipant[] { SearchEngine.getDefaultSearchParticipant() }, |
| createSourceSearchScope(), new SearchRequestor() { |
| |
| @Override |
| public void acceptSearchMatch(final SearchMatch match) throws CoreException { |
| Object o= match.getElement(); |
| if (o instanceof IJavaElement |
| && ((IJavaElement) o).getAncestor(IJavaElement.COMPILATION_UNIT) != null) { |
| matches[0]= match; |
| } |
| } |
| }, monitor); |
| |
| return matches[0]; |
| } |
| |
| /** |
| * Create Java workspace scope. |
| * |
| * @param element IJavaElement to search references for |
| * |
| * @return the Java workspace scope. |
| * @throws JavaModelException when java error. |
| */ |
| private static IJavaSearchScope createSearchScope(IJavaElement element) throws JavaModelException { |
| JavaSearchScopeFactory factory= JavaSearchScopeFactory.getInstance(); |
| boolean isInsideJRE = factory.isInsideJRE(element); |
| IJavaSearchScope scope= factory.createWorkspaceScope(isInsideJRE); |
| return scope; |
| } |
| |
| /** |
| * Create Java source search scope. |
| * |
| * @return the Java workspace scope. |
| * @throws JavaModelException when java error. |
| */ |
| private static IJavaSearchScope createSourceSearchScope() throws JavaModelException { |
| IJavaProject[] projects= JavaCore.create(ResourcesPlugin.getWorkspace().getRoot()).getJavaProjects(); |
| return SearchEngine.createJavaSearchScope(projects, IJavaSearchScope.SOURCES); |
| } |
| } |