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/*******************************************************************************
* 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.internal.provisional.events;
import org.eclipse.wst.sse.core.internal.provisional.text.IStructuredDocument;
/**
* This event is sent if, after analysis, it is found there is no reason to
* change the structuredDocument. This might occur, for example, if someone
* pastes in the exact same text that they are replacing, or if someone tries
* to change a read-only region.
*
* This might be important, for example, if some state variables are set on an
* "about the change" event. then if there is no change (i.e.no other event is
* fired), those state variables could reset, or whatever, upon receiving this
* event.
*
* @plannedfor 1.0
*/
public class NoChangeEvent extends StructuredDocumentEvent {
/**
* NO_CONTENT_CHANGE means that a some text was requested to be replaced
* with identical text, so no change is actually done.
*/
public final static int NO_CONTENT_CHANGE = 2;
/**
* NO_EVENT is used in rare error conditions, when, basically, a request
* to change the document is made before the previous request has
* completed. This event to used so aboutToChange/Changed cycles can
* complete as required, but the document is most likely not modified as
* expected.
*/
public final static int NO_EVENT = 8;
/**
* READ_ONLY_STATE_CHANGE means that the "read only" state of the text was
* changed, not the content itself.
*/
public final static int READ_ONLY_STATE_CHANGE = 4;
/**
* set to one of the above detailed reasons for why no change was done.
*/
public int reason = 0;
/**
* NoChangeEvent constructor. This event can occur if there was a request
* to modify a document or its properties, but there as not really is no
* change to a document's content.
*
* @param source
* @param originalSource
* java.lang.Object
* @param changes
* java.lang.String
* @param offset
* int
* @param lengthToReplace
* int
*/
public NoChangeEvent(IStructuredDocument source, Object originalSource, String changes, int offset, int lengthToReplace) {
super(source, originalSource, changes, offset, lengthToReplace);
}
}
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