| /******************************************************************************* |
| * Copyright (c) 2019 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 is available at https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Andrew Obuchowicz (Red Hat Inc.) |
| *******************************************************************************/ |
| package org.eclipse.lsp4e.operations.codeactions; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Objects; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.TimeoutException; |
| import java.util.stream.Collectors; |
| |
| import org.eclipse.jface.resource.JFaceResources; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.jface.text.contentassist.CompletionProposal; |
| import org.eclipse.jface.text.contentassist.ICompletionProposal; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| import org.eclipse.jface.text.quickassist.IQuickAssistInvocationContext; |
| import org.eclipse.jface.text.quickassist.IQuickAssistProcessor; |
| import org.eclipse.jface.text.source.Annotation; |
| import org.eclipse.jface.text.source.ISourceViewer; |
| import org.eclipse.lsp4e.LSPEclipseUtils; |
| import org.eclipse.lsp4e.LanguageServerPlugin; |
| import org.eclipse.lsp4e.LanguageServiceAccessor; |
| import org.eclipse.lsp4e.LanguageServiceAccessor.LSPDocumentInfo; |
| import org.eclipse.lsp4e.ui.Messages; |
| import org.eclipse.lsp4j.CodeAction; |
| import org.eclipse.lsp4j.CodeActionContext; |
| import org.eclipse.lsp4j.CodeActionParams; |
| import org.eclipse.lsp4j.Command; |
| import org.eclipse.lsp4j.Range; |
| import org.eclipse.lsp4j.TextDocumentIdentifier; |
| import org.eclipse.lsp4j.jsonrpc.messages.Either; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.swt.graphics.Point; |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.internal.progress.ProgressInfoItem; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| |
| public class LSPCodeActionQuickAssistProcessor implements IQuickAssistProcessor { |
| |
| private List<LSPDocumentInfo> infos; |
| private Range range; |
| List<ICompletionProposal> proposals = Collections.synchronizedList(new ArrayList<>()); |
| |
| private static final ICompletionProposal COMPUTING = new ICompletionProposal() { |
| |
| @Override |
| public void apply(IDocument document) { |
| // Placeholder proposal so nothing to do here |
| } |
| |
| @Override |
| public Point getSelection(IDocument document) { |
| return null; |
| } |
| |
| @Override |
| public String getAdditionalProposalInfo() { |
| return null; |
| } |
| |
| @Override |
| public String getDisplayString() { |
| return Messages.computing; |
| } |
| |
| @Override |
| public Image getImage() { |
| return JFaceResources.getImage(ProgressInfoItem.class.getPackage().getName() + ".PROGRESS_DEFAULT"); //$NON-NLS-1$ |
| } |
| |
| @Override |
| public IContextInformation getContextInformation() { |
| return null; |
| } |
| |
| }; |
| |
| CompletionProposal[] NO_PROPOSALS = {}; |
| |
| @Override |
| public String getErrorMessage() { |
| return "CodeActions not implemented on this Language Server"; //$NON-NLS-1$ |
| } |
| |
| @Override |
| public boolean canFix(Annotation annotation) { |
| return true; |
| } |
| |
| @Override |
| public boolean canAssist(IQuickAssistInvocationContext invocationContext) { |
| if (this.infos == null || this.infos.isEmpty()) { |
| infos = getLSPDocumentInfos(); |
| if (infos.isEmpty()) { |
| return false; |
| } |
| } |
| |
| CodeActionParams params = prepareCodeActionParams(infos); |
| List<Either<Command, CodeAction>> possibleProposals = Collections.synchronizedList(new ArrayList<>()); |
| List<CompletableFuture<Void>> futures = infos.stream() |
| .map(info -> info.getInitializedLanguageClient() |
| .thenComposeAsync(ls -> ls.getTextDocumentService().codeAction(params).thenAcceptAsync( |
| actions -> actions.stream().filter(Objects::nonNull).forEach(possibleProposals::add)))) |
| .collect(Collectors.toList()); |
| |
| CompletableFuture<?> aggregateFutures = CompletableFuture |
| .allOf(futures.toArray(new CompletableFuture[futures.size()])); |
| try { |
| aggregateFutures.get(200, TimeUnit.MILLISECONDS); |
| if (possibleProposals.isEmpty()) { |
| return false; |
| } |
| } catch (InterruptedException | ExecutionException | TimeoutException e) { |
| LanguageServerPlugin.logError(e); |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public ICompletionProposal[] computeQuickAssistProposals(IQuickAssistInvocationContext invocationContext) { |
| if (this.infos == null || this.infos.isEmpty()) { |
| infos = getLSPDocumentInfos(); |
| if (infos.isEmpty()) { |
| return NO_PROPOSALS; |
| } |
| } |
| |
| // Get the codeActions |
| CodeActionParams params = prepareCodeActionParams(this.infos); |
| List<CompletableFuture<Void>> futures = Collections.emptyList(); |
| try { |
| // Prevent infinite recursion by only computing proposals if there aren't any |
| if (proposals.contains(COMPUTING) || proposals.isEmpty()) { |
| proposals.clear(); |
| futures = infos.stream() |
| .map(info -> info.getInitializedLanguageClient() |
| .thenComposeAsync(ls -> ls.getTextDocumentService().codeAction(params) |
| .thenAcceptAsync(actions -> actions.stream().filter(Objects::nonNull) |
| .map(action -> new CodeActionCompletionProposal(action, info)) |
| .forEach(proposals::add)))) |
| .collect(Collectors.toList()); |
| |
| CompletableFuture<?> aggregateFutures = CompletableFuture |
| .allOf(futures.toArray(new CompletableFuture[futures.size()])); |
| aggregateFutures.get(200, TimeUnit.MILLISECONDS); |
| } |
| } catch (InterruptedException | ExecutionException e) { |
| LanguageServerPlugin.logError(e); |
| } catch (TimeoutException e) { |
| for (CompletableFuture<Void> future : futures) { |
| future.whenComplete((r, t) -> this.refreshProposals(invocationContext)); |
| } |
| proposals.add(COMPUTING); |
| } |
| |
| return proposals.toArray(new ICompletionProposal[proposals.size()]); |
| } |
| |
| private List<LSPDocumentInfo> getLSPDocumentInfos() { |
| IEditorPart editor = LSPEclipseUtils.getActiveTextEditor(); |
| if (editor != null) { |
| ITextEditor textEditor = (ITextEditor) editor; |
| IDocument document = LSPEclipseUtils.getDocument(textEditor); |
| if (document == null) { |
| return Collections.emptyList(); |
| } |
| infos = LanguageServiceAccessor.getLSPDocumentInfosFor(document, |
| LSPCodeActionMarkerResolution::providesCodeActions); |
| ITextSelection selection = (ITextSelection) textEditor.getSelectionProvider().getSelection(); |
| try { |
| this.range = new Range(LSPEclipseUtils.toPosition(selection.getOffset(), document), |
| LSPEclipseUtils.toPosition(selection.getOffset() + selection.getLength(), document)); |
| } catch (BadLocationException e) { |
| LanguageServerPlugin.logError(e); |
| } |
| } |
| return infos; |
| } |
| |
| /** |
| * Reinvokes the quickAssist in order to refresh the list of completion |
| * proposals |
| * |
| * @param invocationContext |
| * The invocation context |
| */ |
| private void refreshProposals(IQuickAssistInvocationContext invocationContext) { |
| invocationContext.getSourceViewer().getTextWidget().getDisplay().asyncExec(() -> invocationContext |
| .getSourceViewer().getTextOperationTarget().doOperation(ISourceViewer.QUICK_ASSIST)); |
| } |
| |
| private CodeActionParams prepareCodeActionParams(List<LSPDocumentInfo> infos) { |
| CodeActionContext context = new CodeActionContext(Collections.emptyList()); |
| CodeActionParams params = new CodeActionParams(); |
| params.setTextDocument(new TextDocumentIdentifier(infos.get(0).getFileUri().toString())); |
| params.setRange(this.range); |
| params.setContext(context); |
| return params; |
| } |
| |
| } |