/*
* Copyright (c) 2012 Sam Harwell, Tunnel Vision Laboratories LLC
* All rights reserved.
*
* The source code of this document is proprietary work, and is not licensed for
* distribution. For information about licensing, contact Sam Harwell at:
* sam@tunnelvisionlabs.com
*/
package org.antlr.works.editor.st4.experimental;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.EnumSet;
import java.util.List;
import java.util.concurrent.CancellationException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Future;
import org.antlr.netbeans.editor.classification.TokenTag;
import org.antlr.netbeans.editor.completion.Anchor;
import org.antlr.netbeans.editor.tagging.Tagger;
import org.antlr.netbeans.editor.text.DocumentSnapshot;
import org.antlr.netbeans.editor.text.VersionedDocument;
import org.antlr.netbeans.parsing.spi.BaseParserData;
import org.antlr.netbeans.parsing.spi.DocumentParserTaskProvider;
import org.antlr.netbeans.parsing.spi.ParseContext;
import org.antlr.netbeans.parsing.spi.ParserData;
import org.antlr.netbeans.parsing.spi.ParserDataDefinition;
import org.antlr.netbeans.parsing.spi.ParserDataOptions;
import org.antlr.netbeans.parsing.spi.ParserResultHandler;
import org.antlr.netbeans.parsing.spi.ParserTask;
import org.antlr.netbeans.parsing.spi.ParserTaskDefinition;
import org.antlr.netbeans.parsing.spi.ParserTaskManager;
import org.antlr.netbeans.parsing.spi.ParserTaskProvider;
import org.antlr.netbeans.parsing.spi.ParserTaskScheduler;
import org.antlr.v4.runtime.BailErrorStrategy;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.DefaultErrorStrategy;
import org.antlr.v4.runtime.Dependents;
import org.antlr.v4.runtime.RecognitionException;
import org.antlr.v4.runtime.RuleDependency;
import org.antlr.v4.runtime.Token;
import org.antlr.v4.runtime.TokenSource;
import org.antlr.v4.runtime.atn.PredictionMode;
import org.antlr.v4.runtime.misc.ParseCancellationException;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import org.antlr.works.editor.antlr4.classification.TaggerTokenSource;
import org.antlr.works.editor.antlr4.parsing.DescriptiveErrorListener;
import org.antlr.works.editor.st4.StringTemplateEditorKit;
import org.antlr.works.editor.st4.TemplateParserDataDefinitions;
import org.antlr.works.editor.st4.codemodel.FileModel;
import org.antlr.works.editor.st4.experimental.generated.TemplateParser;
import org.antlr.works.editor.st4.experimental.generated.TemplateParser.GroupFileContext;
import org.netbeans.api.editor.mimelookup.MimeRegistration;
/**
*
* @author Sam Harwell
*/
public final class ReferenceAnchorsParserTask implements ParserTask {
private final Object lock = new Object();
private ReferenceAnchorsParserTask() {
}
@Override
public ParserTaskDefinition getDefinition() {
return Definition.INSTANCE;
}
@Override
@RuleDependency(recognizer=TemplateParser.class, rule=TemplateParser.RULE_groupFile, version=4, dependents=Dependents.SELF)
public void parse(ParserTaskManager taskManager, ParseContext context, DocumentSnapshot snapshot, Collection<? extends ParserDataDefinition<?>> requestedData, ParserResultHandler results) throws InterruptedException, ExecutionException {
synchronized (lock) {
ParserData<GroupFileContext> parseTreeResult = taskManager.getData(snapshot, TemplateParserDataDefinitions.REFERENCE_PARSE_TREE, EnumSet.of(ParserDataOptions.NO_UPDATE)).get();
ParserData<List<Anchor>> anchorPointsResult = taskManager.getData(snapshot, TemplateParserDataDefinitions.REFERENCE_ANCHOR_POINTS, EnumSet.of(ParserDataOptions.NO_UPDATE)).get();
ParserData<FileModel> fileModelResult = taskManager.getData(snapshot, TemplateParserDataDefinitions.FILE_MODEL, EnumSet.of(ParserDataOptions.NO_UPDATE)).get();
if (parseTreeResult == null || anchorPointsResult == null || fileModelResult == null) {
Future<ParserData<Tagger<TokenTag<Token>>>> futureTokensData = taskManager.getData(snapshot, TemplateParserDataDefinitions.LEXER_TOKENS);
Tagger<TokenTag<Token>> tagger = futureTokensData.get().getData();
TaggerTokenSource tokenSource = new TaggerTokenSource(tagger, snapshot);
// DocumentSnapshotCharStream input = new DocumentSnapshotCharStream(snapshot);
// input.setSourceName((String)document.getDocument().getProperty(Document.TitleProperty));
// GrammarLexer lexer = new GrammarLexer(input);
InterruptableTokenStream tokenStream = new InterruptableTokenStream(tokenSource);
TemplateParser.GroupFileContext parseResult;
TemplateParser parser = TemplateParserFactory.DEFAULT.getParser(tokenStream);
try {
parser.getInterpreter().setPredictionMode(PredictionMode.SLL);
parser.removeErrorListeners();
parser.setBuildParseTree(true);
parser.setErrorHandler(new BailErrorStrategy());
parseResult = parser.groupFile();
} catch (ParseCancellationException ex) {
if (ex.getCause() instanceof RecognitionException) {
// retry with default error handler
tokenStream.reset();
parser.getInterpreter().setPredictionMode(PredictionMode.LL);
parser.addErrorListener(DescriptiveErrorListener.INSTANCE);
parser.setInputStream(tokenStream);
parser.setErrorHandler(new DefaultErrorStrategy());
parseResult = parser.groupFile();
} else {
throw ex;
}
}
parseTreeResult = new BaseParserData<>(context, TemplateParserDataDefinitions.REFERENCE_PARSE_TREE, snapshot, parseResult);
if (anchorPointsResult == null && snapshot.getVersionedDocument().getDocument() != null) {
TemplateParserAnchorListener listener = new TemplateParserAnchorListener(snapshot);
ParseTreeWalker.DEFAULT.walk(listener, parseResult);
anchorPointsResult = new BaseParserData<>(context, TemplateParserDataDefinitions.REFERENCE_ANCHOR_POINTS, snapshot, listener.getAnchors());
}
if (fileModelResult == null) {
CodeModelBuilderListener codeModelBuilderListener = new CodeModelBuilderListener(snapshot, tokenStream);
ParseTreeWalker.DEFAULT.walk(codeModelBuilderListener, parseResult);
fileModelResult = new BaseParserData<>(context, TemplateParserDataDefinitions.FILE_MODEL, snapshot, codeModelBuilderListener.getFileModel());
}
}
results.addResult(parseTreeResult);
results.addResult(fileModelResult);
if (anchorPointsResult != null) {
results.addResult(anchorPointsResult);
}
}
}
private static class InterruptableTokenStream extends CommonTokenStream {
public InterruptableTokenStream(TokenSource tokenSource) {
super(tokenSource);
}
@Override
public void consume() {
if (Thread.interrupted()) {
throw new CancellationException();
}
super.consume();
}
}
private static final class Definition extends ParserTaskDefinition {
private static final Collection<ParserDataDefinition<?>> INPUTS =
Collections.<ParserDataDefinition<?>>emptyList();
private static final Collection<ParserDataDefinition<?>> OUTPUTS =
Arrays.<ParserDataDefinition<?>>asList(
TemplateParserDataDefinitions.REFERENCE_ANCHOR_POINTS,
TemplateParserDataDefinitions.REFERENCE_PARSE_TREE,
TemplateParserDataDefinitions.FILE_MODEL);
public static final Definition INSTANCE = new Definition();
public Definition() {
super("StringTemplate Reference Anchors", INPUTS, OUTPUTS, ParserTaskScheduler.CONTENT_SENSITIVE_TASK_SCHEDULER);
}
}
@MimeRegistration(mimeType=StringTemplateEditorKit.TEMPLATE_MIME_TYPE, service=ParserTaskProvider.class)
public static final class Provider extends DocumentParserTaskProvider {
@Override
public ParserTaskDefinition getDefinition() {
return Definition.INSTANCE;
}
@Override
public ParserTask createTaskImpl(VersionedDocument document) {
return new ReferenceAnchorsParserTask();
}
}
}