| /******************************************************************************* |
| * 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 content assist processor proposes completions and |
| * computes context information for a particular content type. |
| * A content assist processor is an <code>IContentAssistant</code>-plug-ins. |
| * This interface must be implemented by clients. Implementers should be |
| * registered with a content assistant in order to get involved in the |
| * assisting process. |
| */ |
| public interface IContentAssistProcessor { |
| |
| /** |
| * Returns a list of completion proposals based on the |
| * specified location within the document that corresponds |
| * to the current cursor position within the text viewer. |
| * |
| * @param viewer the viewer whose document is used to compute the proposals |
| * @param documentPosition an offset within the document for which completions should be computed |
| * @return an array of completion proposals or <code>null</code> if no proposals are possible |
| */ |
| ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int documentOffset); |
| |
| /** |
| * Returns information about possible contexts based on the |
| * specified location within the document that corresponds |
| * to the current cursor position within the text viewer. |
| * |
| * @param viewer the viewer whose document is used to compute the possible contexts |
| * @param documentPosition an offset within the document for which context information should be computed |
| * @return an array of context information objects or <code>null</code> if no context could be found |
| */ |
| IContextInformation[] computeContextInformation(ITextViewer viewer, int documentOffset); |
| |
| /** |
| * Returns the characters which when entered by the user should |
| * automatically trigger the presentation of possible completions. |
| * |
| * @return the auto activation characters for completion proposal or <code>null</code> |
| * if no auto activation is desired |
| */ |
| char[] getCompletionProposalAutoActivationCharacters(); |
| |
| /** |
| * Returns the characters which when entered by the user should |
| * automatically trigger the presentation of context information. |
| * |
| * @return the auto activation characters for presenting context information |
| * or <code>null</code> if no auto activation is desired |
| */ |
| char[] getContextInformationAutoActivationCharacters(); |
| |
| /** |
| * Returns the reason why this content assist processor |
| * was unable to produce any completion proposals or context information. |
| * |
| * @return an error message or <code>null</code> if no error occurred |
| */ |
| String getErrorMessage(); |
| |
| /** |
| * Returns a validator used to determine when displayed context information |
| * should be dismissed. May only return <code>null</code> if the processor is |
| * incapable of computing context information. <p> |
| * |
| * @return a context information validator, or <code>null</code> if the processor |
| * is incapable of computing context information |
| */ |
| IContextInformationValidator getContextInformationValidator(); |
| } |