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comparison dwtx/jface/text/contentassist/ContextInformationValidator.d @ 129:eb30df5ca28b

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Added JFace Text sources
author Frank Benoit <benoit@tionex.de>
date Sat, 23 Aug 2008 19:10:48 +0200
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128:8df1d4193877 129:eb30df5ca28b
1 /*******************************************************************************
2 * Copyright (c) 2000, 2005 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module dwtx.jface.text.contentassist.ContextInformationValidator;
14
15 import dwt.dwthelper.utils;
16
17 import dwtx.jface.text.ITextViewer;
18
19
20 /**
21 * A default implementation of the <code>IContextInfomationValidator</code> interface.
22 * This implementation determines whether the information is valid by asking the content
23 * assist processor for all context information objects for the current position. If the
24 * currently displayed information is in the result set, the context information is
25 * considered valid.
26 */
27 public final class ContextInformationValidator : IContextInformationValidator {
28
29 /** The content assist processor. */
30 private IContentAssistProcessor fProcessor;
31 /** The context information to be validated. */
32 private IContextInformation fContextInformation;
33 /** The associated text viewer. */
34 private ITextViewer fViewer;
35
36 /**
37 * Creates a new context information validator which is ready to be installed on
38 * a particular context information.
39 *
40 * @param processor the processor to be used for validation
41 */
42 public ContextInformationValidator(IContentAssistProcessor processor) {
43 fProcessor= processor;
44 }
45
46 /*
47 * @see IContextInformationValidator#install(IContextInformation, ITextViewer, int)
48 */
49 public void install(IContextInformation contextInformation, ITextViewer viewer, int offset) {
50 fContextInformation= contextInformation;
51 fViewer= viewer;
52 }
53
54 /*
55 * @see IContentAssistTipCloser#isContextInformationValid(int)
56 */
57 public bool isContextInformationValid(int offset) {
58 IContextInformation[] infos= fProcessor.computeContextInformation(fViewer, offset);
59 if (infos !is null && infos.length > 0) {
60 for (int i= 0; i < infos.length; i++)
61 if (fContextInformation.equals(infos[i]))
62 return true;
63 }
64 return false;
65 }
66 }