/*******************************************************************************
 * Copyright (c) 2001, 2004 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
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *     Jens Lukowski/Innoopract - initial renaming/restructuring
 *     
 *******************************************************************************/
package org.eclipse.wst.sse.ui.internal.editor;

import java.io.IOException;
import java.io.UnsupportedEncodingException;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.IDocumentProviderExtension;
import org.eclipse.ui.texteditor.IDocumentProviderExtension4;
import org.eclipse.ui.texteditor.IElementStateListener;
import org.eclipse.wst.sse.core.internal.provisional.IStructuredModel;


/**
 * @author nitin
 */
public class StructuredModelDocumentProvider implements IDocumentProvider, IDocumentProviderExtension, IDocumentProviderExtension4 {
	private static StructuredModelDocumentProvider _instance = null;

	/**
	 * @return Returns the instance.
	 */
	public static StructuredModelDocumentProvider getInstance() {
		return _instance;
	}

	{
		_instance = new StructuredModelDocumentProvider();
	}

	private StructuredModelDocumentProvider() {
		super();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#aboutToChange(java.lang.Object)
	 */
	public void aboutToChange(Object element) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#addElementStateListener(org.eclipse.ui.texteditor.IElementStateListener)
	 */
	public void addElementStateListener(IElementStateListener listener) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#canSaveDocument(java.lang.Object)
	 */
	public boolean canSaveDocument(Object element) {
		return ((IStructuredModel) element).isDirty();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#changed(java.lang.Object)
	 */
	public void changed(Object element) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#connect(java.lang.Object)
	 */
	public void connect(Object element) throws CoreException {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#disconnect(java.lang.Object)
	 */
	public void disconnect(Object element) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#getAnnotationModel(java.lang.Object)
	 */
	public IAnnotationModel getAnnotationModel(Object element) {
		return null;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#getDocument(java.lang.Object)
	 */
	public IDocument getDocument(Object element) {
		return ((IStructuredModel) element).getStructuredDocument();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#getModificationStamp(java.lang.Object)
	 */
	public long getModificationStamp(Object element) {
		return ((IStructuredModel) element).getSynchronizationStamp();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#getStatus(java.lang.Object)
	 */
	public IStatus getStatus(Object element) {
		return Status.OK_STATUS;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#getSynchronizationStamp(java.lang.Object)
	 */
	public long getSynchronizationStamp(Object element) {
		return 0;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#isDeleted(java.lang.Object)
	 */
	public boolean isDeleted(Object element) {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#isModifiable(java.lang.Object)
	 */
	public boolean isModifiable(Object element) {
		return true;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#isReadOnly(java.lang.Object)
	 */
	public boolean isReadOnly(Object element) {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#isStateValidated(java.lang.Object)
	 */
	public boolean isStateValidated(Object element) {
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#mustSaveDocument(java.lang.Object)
	 */
	public boolean mustSaveDocument(Object element) {
		return ((IStructuredModel) element).isDirty();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#removeElementStateListener(org.eclipse.ui.texteditor.IElementStateListener)
	 */
	public void removeElementStateListener(IElementStateListener listener) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#resetDocument(java.lang.Object)
	 */
	public void resetDocument(Object element) throws CoreException {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProvider#saveDocument(org.eclipse.core.runtime.IProgressMonitor,
	 *      java.lang.Object, org.eclipse.jface.text.IDocument, boolean)
	 */
	public void saveDocument(IProgressMonitor monitor, Object element, IDocument document, boolean overwrite) throws CoreException {
		try {
			((IStructuredModel) element).save();
		}
		catch (UnsupportedEncodingException e) {
		}
		catch (IOException e) {
		}
		catch (CoreException e) {
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#setCanSaveDocument(java.lang.Object)
	 */
	public void setCanSaveDocument(Object element) {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#synchronize(java.lang.Object)
	 */
	public void synchronize(Object element) throws CoreException {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#updateStateCache(java.lang.Object)
	 */
	public void updateStateCache(Object element) throws CoreException {
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.texteditor.IDocumentProviderExtension#validateState(java.lang.Object,
	 *      java.lang.Object)
	 */
	public void validateState(Object element, Object computationContext) throws CoreException {
	}

	public IContentType getContentType(Object element) throws CoreException {
		return Platform.getContentTypeManager().getContentType(((IStructuredModel) element).getContentTypeIdentifier());
	}
}