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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.text.source;
/**
* Describes the change state of one line, which consists of the state of the line itself, which
* can be <code>UNCHANGED</code>, <code>CHANGED</code> or <code>ADDED</code>, and the number of
* deleted lines before and after this line.
*
* @since 3.0
*/
public interface ILineDiffInfo {
/** Denotes an unchanged line. */
static final int UNCHANGED= 0;
/** Denotes an added line. */
static final int ADDED= 1;
/** Denotes a changed line. */
static final int CHANGED= 2;
/**
* Returns the number of deleted lines after this line.
*
* @return the number of lines after this line.
*/
int getRemovedLinesBelow();
/**
* Returns the number of deleted lines before this line.
*
* @return the number of lines before this line.
*/
int getRemovedLinesAbove();
/**
* Returns the type of this line, one out of <code>UNCHANGED</code>, <code>CHANGED</code> or
* <code>ADDED</code>.
*
* @return the type of this line.
*/
int getChangeType();
/**
* Returns whether this line has any changes (to itself, or any deletions before or after it).
*
* @return <code>true</code>, if the line's state (as returned by <code>getType</code>) is
* either <code>CHANGED</code> or <code>ADDED</code> or either of <code>getRemovedLinesBelow</code>
* and <code>getRemovedLinesAbove</code> would return a number > 0
*/
boolean hasChanges();
/**
* Returns the original text of this changed region
*
* @return the original text of this changed region, including any deleted lines. The returned
* value and its elements may not be <code>null/code>, it may however be of zero length
*/
String[] getOriginalText();
}
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