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/*******************************************************************************
 * Copyright (c) 2000, 2004 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;

import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Point;


/**
 * Extension interface for <code>IFindReplaceTarget</code>. Extends the find replace target with
 * the concept of searching in a limiting scope and introduces a replace-all mode.
 * 
 * @since 2.0
 */
public interface IFindReplaceTargetExtension {
	
	/**
	 * Indicates that a session with the target begins.
	 * All calls except <code>beginSession()</code> and <code>endSession()</code> to
	 * <code>IFindReplaceTarget</code> and
	 * <code>IFindReplaceTargetExtension</code> must be embedded within calls to
	 * <code>beginSession()</code> and <code>endSession()</code>.
	 * 
	 * @see #endSession()
	 */
	void beginSession();

	/**
	 * Indicates that a session with the target ends.
	 * 
	 * @see #beginSession()
	 */
	void endSession();

	/**
	 * Returns the find scope of the target, <code>null</code> for global scope.
	 * 
	 * @return returns the find scope of the target, may be <code>null</code>
	 */
	IRegion getScope();
	
	/**
	 * Sets the find scope of the target to operate on. <code>null</code>
	 * indicates that the global scope should be used.
	 * 
	 * @param scope the find scope of the target, may be <code>null</code>
	 */	
	void setScope(IRegion scope);
	
	/**
	 * Returns the currently selected range of lines as a offset and length.
	 *
	 * @return the currently selected line range
	 */
	Point getLineSelection();
	
	/**
	 * Sets a selection.
	 * 
	 * @param offset the offset of the selection
	 * @param length the length of the selection
	 */
	void setSelection(int offset, int length);
	
	/**
	 * Sets the scope highlight color
	 * 
	 * @param color the color of the scope highlight
	 */
	void setScopeHighlightColor(Color color);
	
	
	/**
	 * Sets the target's replace-all mode.
	 * 
	 * @param replaceAll <code>true</code> if this target should switch into replace-all mode, 
	 * 	<code>false</code> if it should leave the replace-all state
	 */
	void setReplaceAllMode(boolean replaceAll); 
}

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