Java tutorial
/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright 2017 Everlaw. All rights reserved. * * Oracle and Java are registered trademarks of Oracle and/or its affiliates. * Other names may be trademarks of their respective owners. * * The contents of this file are subject to the terms of either the GNU * General Public License Version 2 only ("GPL") or the Common * Development and Distribution License("CDDL") (collectively, the * "License"). You may not use this file except in compliance with the * License. You can obtain a copy of the License at * http://www.netbeans.org/cddl-gplv2.html * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the * specific language governing permissions and limitations under the * License. When distributing the software, include this License Header * Notice in each file and include the License file at * nbbuild/licenses/CDDL-GPL-2-CP. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the GPL Version 2 section of the License file that * accompanied this code. If applicable, add the following below the * License Header, with the fields enclosed by brackets [] replaced by * your own identifying information: * "Portions Copyrighted [year] [name of copyright owner]" * * If you wish your version of this file to be governed by only the CDDL * or only the GPL Version 2, indicate your decision by adding * "[Contributor] elects to include this software in this distribution * under the [CDDL or GPL Version 2] license." If you do not indicate a * single choice of license, a recipient has the option to distribute * your version of this file under either the CDDL, the GPL Version 2 or * to extend the choice of license to its licensees as provided above. * However, if you add GPL Version 2 code and therefore, elected the GPL * Version 2 license, then the option applies only if the new code is * made subject to such option by the copyright holder. */ package netbeanstypescript; import java.util.ArrayList; import java.util.LinkedHashMap; import java.util.LinkedHashSet; import java.util.List; import javax.swing.text.BadLocationException; import org.json.simple.JSONObject; import org.netbeans.modules.csl.api.*; import org.netbeans.modules.csl.api.Error; import org.netbeans.modules.editor.indent.api.Reformat; import org.openide.DialogDisplayer; import org.openide.NotifyDescriptor; import org.openide.filesystems.FileObject; import org.openide.util.Exceptions; /** * * @author jeffrey */ public class TSHintsProvider implements HintsProvider { @Override public void computeHints(HintsManager manager, RuleContext context, List<Hint> hints) { } @Override public void computeSuggestions(HintsManager manager, final RuleContext context, List<Hint> suggestions, int caretOffset) { // Group the possibly-fixable errors by span and dedupe, as getCodeFixesAtPosition requires LinkedHashMap<OffsetRange, LinkedHashSet<Integer>> errsBySpan = new LinkedHashMap<>(); for (Error err : context.parserResult.getDiagnostics()) { int errStart = err.getStartPosition(), errEnd = err.getEndPosition(); if (err.getKey() != null && caretOffset >= errStart && caretOffset <= errEnd) { OffsetRange span = new OffsetRange(errStart, errEnd); LinkedHashSet<Integer> errCodes = errsBySpan.get(span); if (errCodes == null) { errsBySpan.put(span, errCodes = new LinkedHashSet<>()); } errCodes.add(Integer.parseInt(err.getKey())); } } for (OffsetRange span : errsBySpan.keySet()) { final FileObject fileObj = context.parserResult.getSnapshot().getSource().getFileObject(); Object fixes = TSService.call("getCodeFixesAtPosition", fileObj, span.getStart(), span.getEnd(), errsBySpan.get(span)); // amazingly, LinkedHashSet<Integer>'s toString is valid JSON if (fixes == null) { continue; } List<HintFix> hintFixes = new ArrayList<>(); final Reformat formatter = Reformat.get(context.doc); for (final JSONObject fix : (List<JSONObject>) fixes) { hintFixes.add(new HintFix() { @Override public String getDescription() { return (String) fix.get("description"); } @Override public void implement() { for (JSONObject change : (List<JSONObject>) fix.get("changes")) { Object fileName = change.get("fileName"); if (!fileName.equals(fileObj.getPath())) { String error = "Unimplemented: code fix involves changes to a different file " + fileName; DialogDisplayer.getDefault().notify( new NotifyDescriptor.Message(error, NotifyDescriptor.ERROR_MESSAGE)); return; } } formatter.lock(); try { context.doc.runAtomic(new Runnable() { @Override public void run() { try { for (JSONObject change : (List<JSONObject>) fix.get("changes")) { OffsetRange changed = TSFormatter.applyEdits(context.doc, change.get("textChanges")); // Code fixes are badly formatted, so reformat the affected range // https://github.com/Microsoft/TypeScript/issues/12249 if (changed != null) { formatter.reformat(changed.getStart(), changed.getEnd()); } } } catch (BadLocationException ex) { Exceptions.printStackTrace(ex); } } }); } finally { formatter.unlock(); } } @Override public boolean isSafe() { return false; } @Override public boolean isInteractive() { return false; } }); } if (!hintFixes.isEmpty()) { Rule rule = new Rule() { @Override public boolean appliesTo(RuleContext rc) { return true; } @Override public String getDisplayName() { return "TS code fix"; } @Override public boolean showInTasklist() { return false; } @Override public HintSeverity getDefaultSeverity() { return HintSeverity.ERROR; } }; suggestions.add(new Hint(rule, hintFixes.size() + (hintFixes.size() == 1 ? " code fix" : " code fixes") + " available", fileObj, span, hintFixes, 0)); } } } @Override public void computeSelectionHints(HintsManager manager, RuleContext context, List<Hint> suggestions, int start, int end) { } @Override public void computeErrors(HintsManager manager, RuleContext context, List<Hint> hints, List<Error> unhandled) { // There may be relevant code fixes, but we can't query code fixes without fully computing // their diffs, which is potentially too expensive to do for all errors in the file. // So we provide code fixes as "suggestions" instead. unhandled.addAll(context.parserResult.getDiagnostics()); } @Override public void cancel() { } @Override public List<Rule> getBuiltinRules() { return null; } @Override public RuleContext createRuleContext() { return new RuleContext(); } }