Goto definition iin pipeline editor, working for resources

vscode-extensions/commons/commons-language-server/src/main/java/org/springframework/ide/vscode/commons/languageserver/definition/SimpleDefinitionFinder.java

@@ -0,0 +1,87 @@
+/*******************************************************************************
+ * Copyright (c) 2017 Pivotal, Inc.
+ * 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:
+ *     Pivotal, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.springframework.ide.vscode.commons.languageserver.definition;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.stream.Collectors;
+
+import org.eclipse.lsp4j.Location;
+import org.eclipse.lsp4j.TextDocumentPositionParams;
+import org.springframework.ide.vscode.commons.languageserver.util.DefinitionHandler;
+import org.springframework.ide.vscode.commons.languageserver.util.SimpleLanguageServer;
+import org.springframework.ide.vscode.commons.util.Log;
+import org.springframework.ide.vscode.commons.util.text.TextDocument;
+
+import reactor.core.publisher.Flux;
+
+/**
+ * {@link SimpleDefinitionFinder} provides a 'dummy' implementation of
+ * @author Kris De Volder
+ */
+public class SimpleDefinitionFinder<T extends SimpleLanguageServer> implements DefinitionHandler {
+
+	protected final T server;
+
+	public SimpleDefinitionFinder(T server) {
+		this.server = server;
+	}
+
+	@Override
+	public CompletableFuture<List<Location>> handle(TextDocumentPositionParams position) {
+		return findDefinitions(position)
+				.collect(Collectors.toList())
+				.toFuture();
+	}
+
+	/**
+	 * This is meant to be overridden by subclass. This method provides a simple implementation
+	 * of 'goto definition' (which is not one you probably want to use in practice, but it
+	 * might be usful just to test whether things are wired up correctly to make the
+	 * 'goto definition' action in vscode work.
+	 * <p>
+	 * The implementation provided here simply looks for the first occurrence of the word
+	 * currently pointed at in the current document using String.indexOf.
+	 */
+	protected Flux<Location> findDefinitions(TextDocumentPositionParams params) {
+			try {
+			TextDocument doc = server.getTextDocumentService().get(params);
+			int offset = doc.toOffset(params.getPosition());
+			int start = offset;
+			while (Character.isLetter(doc.getSafeChar(start))) {
+				start--;
+			}
+			start = start+1;
+			int end = offset;
+			while (Character.isLetter(doc.getSafeChar(end))) {
+				end++;
+			}
+			String word = doc.textBetween(start, end);
+			Log.log("Looking for definition of '"+word+"'");
+			String text = doc.get();
+			int def = text.indexOf(word);
+			if (def>=0) {
+				return Flux.just(
+					new Location(params.getTextDocument().getUri(),
+						doc.toRange(def, word.length())
+					)
+				)
+				.doOnNext((Location loc) -> {
+					Log.log("definition: "+loc);
+				});
+			}
+		} catch (Exception e) {
+			Log.log(e);
+		}
+		return Flux.empty();
+	}
+
+}

vscode-extensions/commons/commons-language-server/src/main/java/org/springframework/ide/vscode/commons/languageserver/util/DefinitionHandler.java

@@ -0,0 +1,22 @@
+/*******************************************************************************
+ * Copyright (c) 2017 Pivotal, Inc.
+ * 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:
+ *     Pivotal, Inc. - initial API and implementation
+ *******************************************************************************/
+package org.springframework.ide.vscode.commons.languageserver.util;
+
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+
+import org.eclipse.lsp4j.Location;
+import org.eclipse.lsp4j.TextDocumentPositionParams;
+
+@FunctionalInterface
+public interface DefinitionHandler {
+	CompletableFuture<List<Location>> handle(TextDocumentPositionParams position);
+}

vscode-extensions/commons/commons-language-server/src/main/java/org/springframework/ide/vscode/commons/languageserver/util/DocumentRegion.java

@@ -65,6 +65,13 @@ public class DocumentRegion implements CharSequence {
 		this.end = limitRange(end, start, doc.getLength());
 	}
 
+	/**
+	 * Create {@link DocumentRegion} covering the whole document.
+	 */
+	public DocumentRegion(IDocument doc) {
+		this(doc, 0, doc.getLength());
+	}
+
 	private int limitRange(int offset, int min, int max) {
 		if (offset<min) {
 			return min;

vscode-extensions/commons/commons-language-server/src/main/java/org/springframework/ide/vscode/commons/languageserver/util/SimpleTextDocumentService.java

@@ -72,6 +72,8 @@ public class SimpleTextDocumentService implements TextDocumentService {
 	private CompletionResolveHandler completionResolveHandler = null;
 	private HoverHandler hoverHandler = null;
 
+	private DefinitionHandler definitionHandler;
+
 	public SimpleTextDocumentService(SimpleLanguageServer server) {
 		this.server = server;
 	}
@@ -91,6 +93,11 @@ public class SimpleTextDocumentService implements TextDocumentService {
 		this.completionResolveHandler = h;
 	}
 
+	public synchronized void onDefinition(DefinitionHandler h) {
+		Assert.isNull("A defintion handler is already set, multiple handlers not supported yet", definitionHandler);
+		this.definitionHandler = h;
+	}
+
 	/**
 	 * Gets all documents this service is tracking, generally these are the documents that have been opened / changed,
 	 * and not yet closed.
@@ -221,9 +228,15 @@ public class SimpleTextDocumentService implements TextDocumentService {
 		return Futures.of(null);
 	}
 
+	@SuppressWarnings({ "unchecked"})
 	@Override
 	public CompletableFuture<List<? extends Location>> definition(TextDocumentPositionParams position) {
-		return Futures.of(Collections.emptyList());
+		DefinitionHandler h = this.definitionHandler;
+		if (h!=null) {
+			Object r = h.handle(position); //YUCK!
+			return (CompletableFuture<List<? extends Location>>) r;
+		}
+		return CompletableFuture.completedFuture(Collections.emptyList());
 	}
 
 	@Override
@@ -294,4 +307,9 @@ public class SimpleTextDocumentService implements TextDocumentService {
 		return Futures.of(Collections.emptyList());
 	}
 
+	public void onDefinition(TextDocumentPositionParams h) {
+		// TODO Auto-generated method stub
+
+	}
+
 }