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/*******************************************************************************
 * Copyright (c) 2000, 2006 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
 *******************************************************************************/

package org.eclipse.ui.console;

import org.eclipse.jface.text.IDocumentPartitioner;
import org.eclipse.swt.custom.StyleRange;

/**
 * A document partitioner for a text console.
 * <p>
 * In addition to regular partitioner duties, a console document partitioner
 * dictates which regions in its document are read-only and provides style ranges.
 * </p>
 * <p>
 * Clients may implement this interface.
 * </p>
 * @see org.eclipse.ui.console.TextConsole
 * @since 3.1
 */
public interface IConsoleDocumentPartitioner extends IDocumentPartitioner {

    /**
     * Returns whether this partitioner's document is read-only at the specified
     * offset. The user is not allowed to type in read-only locations.
     *
     * @param offset document offset
     * @return whether this partitioner's document is read-only at the specified
     * offset
     */
    public boolean isReadOnly(int offset);

    /**
     * Returns style ranges for the specified region of this partitioner's document
     * to use when rendering, or <code>null</code> if none.
     *
     * @param offset beginning offset for which style ranges are requested
     * @param length the length of text for which style ranges are requested
     * @return style ranges for the specified region of this partitioner's document
     * to use when rendering, or <code>null</code> if none
     */
    public StyleRange[] getStyleRanges(int offset, int length);
}

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