/*******************************************************************************
 * 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.core.events;

import org.eclipse.jface.text.DocumentEvent;
import org.eclipse.jface.text.IDocument;
import org.eclipse.wst.sse.core.text.IStructuredDocument;


/**
 * IStructuredDocument events are generated by the IStructuredDocument, after
 * the IStructuredDocument acts on a request.
 */
public abstract class StructuredDocumentEvent extends DocumentEvent {
	protected String fDeletedText;
	protected Object fOriginalRequester;

	public IStructuredDocument fStructuredDocument;

	//public int fOffset;
	//public int fLength;
	//public String fText;
	/**
	 * We assume that IStructuredDocument's are ALWAYS the source of
	 * IStructuredDocument events
	 */
	protected StructuredDocumentEvent(IStructuredDocument source) {
		super();
		if (source == null)
			throw new IllegalArgumentException("null source"); //$NON-NLS-1$
		fDocument = source;
		fStructuredDocument = source;
	}

	protected StructuredDocumentEvent(IStructuredDocument source, Object originalSource) {
		this(source);
		fOriginalRequester = originalSource;
	}

	protected StructuredDocumentEvent(IStructuredDocument source, Object originalSource, String changes, int offset, int lengthToReplace) {
		this(source);
		fOriginalRequester = originalSource;
		fText = changes;
		fOffset = offset;
		fLength = lengthToReplace;
	}

	/**
	 * @return java.lang.String
	 */
	public java.lang.String getDeletedText() {
		return fDeletedText;
	}

	public IDocument getDocument() {

		return fStructuredDocument;
	}

	public int getLength() {

		return fLength;
	}

	public int getOffset() {

		return getOriginalStart();
	}

	/**
	 * This method returns the object that originally caused the event to
	 * fire. This is typically not the object that created the event (the
	 * IStructuredDocument) but instead the object object that made a request
	 * to the IStructuredDocument.
	 * 
	 * @return java.lang.Object
	 */
	public java.lang.Object getOriginalSource() {
		return fOriginalRequester;
	}

	public int getOriginalStart() {
		return fOffset;
	}

	/**
	 * This method is equivalent to 'getSource' except it returns an object of
	 * the appropriate type (namely, a IStructuredDocument, instead of
	 * Object).
	 */
	public IStructuredDocument getStructuredDocument() {
		// a safe case, since constructor can only be called with a
		// IStructuredDocument
		return fStructuredDocument;
	}

	public String getText() {

		return fText;
	}

	/**
	 * @param newDeletedText
	 *            java.lang.String
	 */
	public void setDeletedText(java.lang.String newDeletedText) {
		fDeletedText = newDeletedText;
	}

	/**
	 * returns the classname, but not the 'source=' (as super does).
	 */
	public String toString() {
		//return getClass().getName() + "[source=" + source + "]";
		return getClass().getName();
	}
}