/*******************************************************************************
 * Copyright (c) 2005, 2007 IBM Corporation 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 org.eclipse.dltk.internal.ui.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.
 * 
	 *
 */
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;
	}

	/*
	 * @see org.eclipse.jface.text.reconciler.IReconcilingStrategy#setDocument(org.eclipse.jface.text.IDocument)
	 */
	public void setDocument(IDocument document)
	{
		if( fStrategies == null )
			return;

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

	/*
	 * @see org.eclipse.jface.text.reconciler.IReconcilingStrategy#reconcile(org.eclipse.jface.text.reconciler.DirtyRegion,
	 *      org.eclipse.jface.text.IRegion)
	 */
	public void reconcile(DirtyRegion dirtyRegion, IRegion subRegion)
	{
		if( fStrategies == null ) {
			return;
		}

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

	/*
	 * @see org.eclipse.jface.text.reconciler.IReconcilingStrategy#reconcile(org.eclipse.jface.text.IRegion)
	 */
	public void reconcile(IRegion partition)
	{
		if( fStrategies == null ) {
			return;
		}

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

	/*
	 * @see org.eclipse.jface.text.reconciler.IReconcilingStrategyExtension#setProgressMonitor(org.eclipse.core.runtime.IProgressMonitor)
	 */
	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);
			}
		}
	}

	/*
	 * @see org.eclipse.jface.text.reconciler.IReconcilingStrategyExtension#initialReconcile()
	 */
	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();
			}
		}
	}
}