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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.jface.text.contentassist.IContextInformationValidator;
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14
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15 import dwt.dwthelper.utils;
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16
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17 import dwtx.jface.text.ITextViewer;
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18
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19
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20 /**
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21 * A context information validator is used to determine if
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22 * a displayed context information is still valid or should
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23 * be dismissed.
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24 * <p>
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25 * The interface can be implemented by clients.
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26 * </p>
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27 *
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28 * @see IContextInformationPresenter
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29 */
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30 public interface IContextInformationValidator {
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31
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32 /**
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33 * Installs this validator for the given context information.
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34 *
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35 * @param info the context information which this validator should check
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36 * @param viewer the text viewer on which the information is presented
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37 * @param offset the document offset for which the information has been computed
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38 */
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39 void install(IContextInformation info, ITextViewer viewer, int offset);
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40
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41 /**
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42 * Returns whether the information this validator is installed on is still valid
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43 * at the given document position.
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44 *
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45 * @param offset the current offset within the document
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46 * @return <code>true</code> if the information also valid at the given document position
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47 */
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48 bool isContextInformationValid(int offset);
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49 }
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