| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.netbeans.modules.languages.antlr; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import org.netbeans.api.lexer.Token; |
| import org.netbeans.api.lexer.TokenHierarchy; |
| import org.netbeans.api.lexer.TokenSequence; |
| import org.netbeans.modules.csl.api.ColoringAttributes; |
| import org.netbeans.modules.csl.api.OccurrencesFinder; |
| import org.netbeans.modules.csl.api.OffsetRange; |
| import org.netbeans.modules.parsing.spi.Scheduler; |
| import org.netbeans.modules.parsing.spi.SchedulerEvent; |
| |
| /** |
| * |
| * @author lkishalmi |
| */ |
| public class AntlrOccurancesFinder extends OccurrencesFinder<AntlrParserResult> { |
| |
| private int caretPosition; |
| private boolean cancelled; |
| private final Map<OffsetRange, ColoringAttributes> occurrences = new HashMap<>(); |
| |
| @Override |
| public void setCaretPosition(int position) { |
| caretPosition = position; |
| } |
| |
| @Override |
| public Map<OffsetRange, ColoringAttributes> getOccurrences() { |
| return occurrences; |
| } |
| |
| @Override |
| public void run(AntlrParserResult result, SchedulerEvent event) { |
| occurrences.clear(); |
| if (checkAndResetCancel()) { |
| return; |
| } |
| computeOccurrences(result); |
| } |
| |
| @Override |
| public int getPriority() { |
| return 200; |
| } |
| |
| @Override |
| public Class<? extends Scheduler> getSchedulerClass() { |
| return Scheduler.CURSOR_SENSITIVE_TASK_SCHEDULER; |
| } |
| |
| @Override |
| public void cancel() { |
| this.cancelled = true; |
| } |
| |
| |
| private boolean checkAndResetCancel() { |
| if (cancelled) { |
| cancelled = false; |
| return true; |
| } |
| return false; |
| } |
| |
| private void computeOccurrences(AntlrParserResult result) { |
| TokenHierarchy<?> tokenHierarchy = result.getSnapshot().getTokenHierarchy(); |
| TokenSequence<?> ts = tokenHierarchy.tokenSequence(); |
| ts.move(caretPosition); |
| if (ts.movePrevious()) { |
| ts.moveNext(); |
| Token<?> token = ts.token(); |
| if (token.id() == AntlrTokenId.RULE || token.id() == AntlrTokenId.TOKEN) { |
| String refName = String.valueOf(token.text()); |
| Map<String, AntlrParserResult.Reference> refs = result.references; |
| AntlrParserResult.Reference ref = refs.get(refName); |
| if (ref != null) { |
| occurrences.put(ref.defOffset, ColoringAttributes.MARK_OCCURRENCES); |
| for (OffsetRange occurance : ref.occurances) { |
| occurrences.put(occurance, ColoringAttributes.MARK_OCCURRENCES); |
| } |
| } |
| } |
| } |
| } |
| } |