| /******************************************************************************* |
| * Copyright (c) 2000, 2003 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.contentassist; |
| |
| |
| |
| import org.eclipse.jface.text.ITextViewer; |
| |
| |
| /** |
| * A default implementation of the <code>IContextInfomationValidator</code> interface. |
| * This implementation determines whether the information is valid by asking the content |
| * assist processor for all context information objects for the current position. If the |
| * currently displayed information is in the result set, the context information is |
| * considered valid. |
| */ |
| public final class ContextInformationValidator implements IContextInformationValidator { |
| |
| /** The content assist processor */ |
| private IContentAssistProcessor fProcessor; |
| /** The context information to be validated */ |
| private IContextInformation fContextInformation; |
| /** The associated text viewer */ |
| private ITextViewer fViewer; |
| |
| /** |
| * Creates a new context information validator which is ready to be installed on |
| * a particular context information. |
| * |
| * @param processor the processor to be used for validation |
| */ |
| public ContextInformationValidator(IContentAssistProcessor processor) { |
| fProcessor= processor; |
| } |
| |
| /* |
| * @see IContextInformationValidator#install(IContextInformation, ITextViewer, int) |
| */ |
| public void install(IContextInformation contextInformation, ITextViewer viewer, int position) { |
| fContextInformation= contextInformation; |
| fViewer= viewer; |
| } |
| |
| /* |
| * @see IContentAssistTipCloser#isContextInformationValid(int) |
| */ |
| public boolean isContextInformationValid(int position) { |
| IContextInformation[] infos= fProcessor.computeContextInformation(fViewer, position); |
| if (infos != null && infos.length > 0) { |
| for (int i= 0; i < infos.length; i++) |
| if (fContextInformation.equals(infos[i])) |
| return true; |
| } |
| return false; |
| } |
| } |