/*
 *  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.grammar.fold;

import java.util.Collection;
import java.util.Collections;
import org.antlr.netbeans.editor.fold.AbstractFoldManagerParserTask;
import org.antlr.netbeans.editor.fold.AbstractFoldScanner;
import org.antlr.netbeans.editor.text.VersionedDocument;
import org.antlr.netbeans.parsing.spi.DocumentParserTaskProvider;
import org.antlr.netbeans.parsing.spi.ParserData;
import org.antlr.netbeans.parsing.spi.ParserDataDefinition;
import org.antlr.netbeans.parsing.spi.ParserTask;
import org.antlr.netbeans.parsing.spi.ParserTaskDefinition;
import org.antlr.netbeans.parsing.spi.ParserTaskProvider;
import org.antlr.netbeans.parsing.spi.ParserTaskScheduler;
import org.antlr.works.editor.grammar.GrammarEditorKit;
import org.antlr.works.editor.grammar.GrammarParserDataDefinitions;
import org.antlr.works.editor.grammar.parser.CompiledModel;
import org.antlr.works.editor.grammar.parser.CompiledModelV3;
import org.netbeans.api.editor.mimelookup.MimeRegistration;

/**
 *
 * @author Sam Harwell
 */
public final class GrammarFoldManagerParserTask extends AbstractFoldManagerParserTask<CompiledModel> {

    private final AbstractFoldScanner<CompiledModel> v3 = new GrammarFoldScannerV3();
    private final AbstractFoldScanner<CompiledModel> v4 = new GrammarFoldScannerV4();
    private final Object lock = new Object();

    private GrammarFoldManagerParserTask() {
        super(GrammarParserDataDefinitions.COMPILED_MODEL);
    }

    @Override
    public ParserTaskDefinition getDefinition() {
        return Definition.INSTANCE;
    }

    @Override
    protected Runnable getScanner(final ParserData<CompiledModel> parseResult) {
        return new Runnable() {

            @Override
            public void run() {
                synchronized (lock) {
                    if (parseResult.getData() instanceof CompiledModelV3) {
                        v3.run(parseResult);
                    } else {
                        v4.run(parseResult);
                    }
                }
            }

        };
    }

    private static final class Definition extends ParserTaskDefinition {
        private static final Collection<ParserDataDefinition<?>> INPUTS =
            Collections.<ParserDataDefinition<?>>singletonList(GrammarParserDataDefinitions.COMPILED_MODEL);
        private static final Collection<ParserDataDefinition<?>> OUTPUTS = Collections.emptyList();

        public static final Definition INSTANCE = new Definition();

        public Definition() {
            super("Grammar Fold Manager", INPUTS, OUTPUTS, ParserTaskScheduler.INPUT_SENSITIVE_TASK_SCHEDULER);
        }
    }

    @MimeRegistration(mimeType=GrammarEditorKit.GRAMMAR_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 GrammarFoldManagerParserTask();
        }

    }

}