/*******************************************************************************
 * Copyright (c) 2014, 2015 Cisco Systems, Inc. and others.  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
 *  
 *******************************************************************************/
package com.cisco.yangide.editor.editors.text;

import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.reconciler.DirtyRegion;
import org.eclipse.jface.text.reconciler.IReconcilingStrategy;
import org.eclipse.jface.text.reconciler.IReconcilingStrategyExtension;

/**
 * A reconciling strategy consisting of a sequence of internal reconciling strategies. By default,
 * all requests are passed on to the contained strategies.
 *
 * @author Konstantin Zaitsev
 * @date Jul 10, 2014
 */
public class CompositeReconcilingStrategy implements IReconcilingStrategy, IReconcilingStrategyExtension {

    /** The list of internal reconciling strategies. */
    private IReconcilingStrategy[] fStrategies;

    /**
     * Creates a new, empty composite reconciling strategy.
     */
    public CompositeReconcilingStrategy() {
    }

    /**
     * Sets the reconciling strategies for this composite strategy.
     *
     * @param strategies the strategies to be set or <code>null</code>
     */
    public void setReconcilingStrategies(IReconcilingStrategy[] strategies) {
        fStrategies = strategies;
    }

    /**
     * Returns the previously set stratgies or <code>null</code>.
     *
     * @return the contained strategies or <code>null</code>
     */
    public IReconcilingStrategy[] getReconcilingStrategies() {
        return fStrategies;
    }

    @Override
    public void setDocument(IDocument document) {
        if (fStrategies == null) {
            return;
        }

        for (int i = 0; i < fStrategies.length; i++) {
            fStrategies[i].setDocument(document);
        }
    }

    @Override
    public void reconcile(DirtyRegion dirtyRegion, IRegion subRegion) {
        if (fStrategies == null) {
            return;
        }

        for (int i = 0; i < fStrategies.length; i++) {
            fStrategies[i].reconcile(dirtyRegion, subRegion);
        }
    }

    @Override
    public void reconcile(IRegion partition) {
        if (fStrategies == null) {
            return;
        }

        for (int i = 0; i < fStrategies.length; i++) {
            fStrategies[i].reconcile(partition);
        }
    }

    @Override
    public void setProgressMonitor(IProgressMonitor monitor) {
        if (fStrategies == null) {
            return;
        }

        for (int i = 0; i < fStrategies.length; i++) {
            if (fStrategies[i] instanceof IReconcilingStrategyExtension) {
                IReconcilingStrategyExtension extension = (IReconcilingStrategyExtension) fStrategies[i];
                extension.setProgressMonitor(monitor);
            }
        }
    }

    @Override
    public void initialReconcile() {
        if (fStrategies == null) {
            return;
        }

        for (int i = 0; i < fStrategies.length; i++) {
            if (fStrategies[i] instanceof IReconcilingStrategyExtension) {
                IReconcilingStrategyExtension extension = (IReconcilingStrategyExtension) fStrategies[i];
                extension.initialReconcile();
            }
        }
    }
}