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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.ContextInformationValidator;
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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 default implementation of the <code>IContextInfomationValidator</code> interface.
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22 * This implementation determines whether the information is valid by asking the content
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23 * assist processor for all context information objects for the current position. If the
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24 * currently displayed information is in the result set, the context information is
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25 * considered valid.
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26 */
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27 public final class ContextInformationValidator : IContextInformationValidator {
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28
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29 /** The content assist processor. */
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30 private IContentAssistProcessor fProcessor;
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31 /** The context information to be validated. */
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32 private IContextInformation fContextInformation;
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33 /** The associated text viewer. */
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34 private ITextViewer fViewer;
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35
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36 /**
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37 * Creates a new context information validator which is ready to be installed on
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38 * a particular context information.
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39 *
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40 * @param processor the processor to be used for validation
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41 */
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42 public ContextInformationValidator(IContentAssistProcessor processor) {
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43 fProcessor= processor;
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44 }
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45
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46 /*
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47 * @see IContextInformationValidator#install(IContextInformation, ITextViewer, int)
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48 */
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49 public void install(IContextInformation contextInformation, ITextViewer viewer, int offset) {
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50 fContextInformation= contextInformation;
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51 fViewer= viewer;
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52 }
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53
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54 /*
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55 * @see IContentAssistTipCloser#isContextInformationValid(int)
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56 */
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57 public bool isContextInformationValid(int offset) {
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58 IContextInformation[] infos= fProcessor.computeContextInformation(fViewer, offset);
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59 if (infos !is null && infos.length > 0) {
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60 for (int i= 0; i < infos.length; i++)
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61 if (fContextInformation.equals(infos[i]))
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62 return true;
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63 }
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64 return false;
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65 }
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66 }
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