| /******************************************************************************* |
| * Copyright (c) 2005, 2010 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * Jens Lukowski/Innoopract - initial renaming/restructuring |
| * |
| *******************************************************************************/ |
| package org.eclipse.wst.sse.ui.internal.contentassist; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.contentassist.ContentAssistant; |
| import org.eclipse.jface.text.contentassist.IContentAssistProcessor; |
| import org.eclipse.wst.sse.ui.internal.IReleasable; |
| |
| /** |
| * <p>Content assistant that uses {@link CompoundContentAssistProcessor}s so that multiple |
| * processors can be registered for each partition type</p> |
| */ |
| public class StructuredContentAssistant extends ContentAssistant { |
| /** need to retain copy of all releasable processors so they can be released on uninstall */ |
| private List fReleasableProcessors; |
| |
| /** |
| * <code>true</code> if a content assist processor has been added to this assistant, |
| * <code>false</code> otherwise |
| */ |
| private boolean fIsInitalized; |
| |
| private boolean fProcessorsReleased = false; |
| |
| /** |
| * <p>Construct the assistant</p> |
| */ |
| public StructuredContentAssistant() { |
| this.fIsInitalized = false; |
| this.fReleasableProcessors = new ArrayList(); |
| } |
| |
| /** |
| * <p>Each set content assist processor is placed inside a |
| * CompoundContentAssistProcessor which allows multiple processors per |
| * partition type</p> |
| * |
| * @param processor |
| * the content assist processor to register, or |
| * <code>null</code> to remove an existing one |
| * @param contentType |
| * the content type under which to register |
| * |
| * @see org.eclipse.jface.text.contentassist.ContentAssistant#setContentAssistProcessor(org.eclipse.jface.text.contentassist.IContentAssistProcessor, java.lang.String) |
| */ |
| public void setContentAssistProcessor(IContentAssistProcessor processor, String partitionType) { |
| this.fIsInitalized = true; |
| |
| CompoundContentAssistProcessor compoundProcessor = getExistingContentAssistProcessor(partitionType); |
| if(compoundProcessor == null) { |
| compoundProcessor = new CompoundContentAssistProcessor(); |
| this.fReleasableProcessors.add(compoundProcessor); |
| } |
| |
| compoundProcessor.add(processor); |
| super.setContentAssistProcessor(compoundProcessor, partitionType); |
| } |
| |
| /** |
| * Returns true if content assist has been initialized with some content |
| * assist processors. False otherwise. |
| * |
| * @return true if content assistant has been initialized |
| */ |
| public boolean isInitialized() { |
| return this.fIsInitalized; |
| } |
| |
| /** |
| * |
| * @param partitionType |
| * @return |
| */ |
| private CompoundContentAssistProcessor getExistingContentAssistProcessor(String partitionType) { |
| CompoundContentAssistProcessor compoundContentAssistProcessor = null; |
| IContentAssistProcessor processor = super.getContentAssistProcessor(partitionType); |
| if (processor != null) { |
| if (processor instanceof CompoundContentAssistProcessor) { |
| compoundContentAssistProcessor = (CompoundContentAssistProcessor) processor; |
| } |
| } |
| return compoundContentAssistProcessor; |
| } |
| |
| public void install(ITextViewer textViewer) { |
| if (fProcessorsReleased) { |
| if (this.fReleasableProcessors != null && !this.fReleasableProcessors.isEmpty()) { |
| for(int i = 0; i < this.fReleasableProcessors.size(); ++i) { |
| ((CompoundContentAssistProcessor)this.fReleasableProcessors.get(i)).install(textViewer); |
| } |
| } |
| fProcessorsReleased = false; |
| } |
| super.install(textViewer); |
| } |
| |
| /** |
| * @see org.eclipse.jface.text.contentassist.ContentAssistant#uninstall() |
| */ |
| public void uninstall() { |
| // dispose of all content assist processors |
| if (this.fReleasableProcessors != null && !this.fReleasableProcessors.isEmpty()) { |
| for(int i = 0; i < this.fReleasableProcessors.size(); ++i) { |
| ((IReleasable)this.fReleasableProcessors.get(i)).release(); |
| } |
| } |
| fProcessorsReleased = true; |
| super.uninstall(); |
| } |
| } |