| /******************************************************************************* |
| * Copyright (c) 2000, 2006 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 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.refactoring.contentassist; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.swt.graphics.Image; |
| |
| import org.eclipse.jface.contentassist.IContentAssistSubjectControl; |
| import org.eclipse.jface.contentassist.ISubjectControlContentAssistProcessor; |
| import org.eclipse.jface.preference.IPreferenceStore; |
| import org.eclipse.jface.viewers.ILabelProvider; |
| |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.contentassist.ICompletionProposal; |
| import org.eclipse.jface.text.contentassist.IContentAssistProcessor; |
| import org.eclipse.jface.text.contentassist.IContextInformation; |
| import org.eclipse.jface.text.contentassist.IContextInformationValidator; |
| |
| import org.eclipse.jdt.core.IJavaElement; |
| import org.eclipse.jdt.core.IPackageFragment; |
| import org.eclipse.jdt.core.IPackageFragmentRoot; |
| import org.eclipse.jdt.core.JavaModelException; |
| |
| |
| import org.eclipse.jdt.ui.JavaElementLabelProvider; |
| import org.eclipse.jdt.ui.PreferenceConstants; |
| import org.eclipse.jdt.ui.text.java.CompletionProposalComparator; |
| |
| import org.eclipse.jdt.internal.ui.JavaPlugin; |
| import org.eclipse.jdt.internal.ui.text.java.JavaCompletionProposal; |
| |
| public class JavaPackageCompletionProcessor implements IContentAssistProcessor, ISubjectControlContentAssistProcessor { |
| |
| private IPackageFragmentRoot fPackageFragmentRoot; |
| private CompletionProposalComparator fComparator; |
| private ILabelProvider fLabelProvider; |
| |
| private char[] fProposalAutoActivationSet; |
| |
| /** |
| * Creates a <code>JavaPackageCompletionProcessor</code>. |
| * The completion context must be set via {@link #setPackageFragmentRoot(IPackageFragmentRoot)}. |
| */ |
| public JavaPackageCompletionProcessor() { |
| this(new JavaElementLabelProvider(JavaElementLabelProvider.SHOW_SMALL_ICONS)); |
| } |
| |
| /** |
| * Creates a <code>JavaPackageCompletionProcessor</code>. |
| * The Processor uses the given <code>ILabelProvider</code> to show text and icons for the |
| * possible completions. |
| * @param labelProvider Used for the popups. |
| */ |
| public JavaPackageCompletionProcessor(ILabelProvider labelProvider) { |
| fComparator= new CompletionProposalComparator(); |
| fLabelProvider= labelProvider; |
| |
| IPreferenceStore preferenceStore= JavaPlugin.getDefault().getPreferenceStore(); |
| String triggers= preferenceStore.getString(PreferenceConstants.CODEASSIST_AUTOACTIVATION_TRIGGERS_JAVA); |
| fProposalAutoActivationSet = triggers.toCharArray(); |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#computeCompletionProposals(org.eclipse.jface.text.ITextViewer, int) |
| */ |
| public ICompletionProposal[] computeCompletionProposals(ITextViewer viewer, int documentOffset) { |
| Assert.isTrue(false, "ITextViewer not supported"); //$NON-NLS-1$ |
| return null; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#computeContextInformation(org.eclipse.jface.text.ITextViewer, int) |
| */ |
| public IContextInformation[] computeContextInformation(ITextViewer viewer, int documentOffset) { |
| Assert.isTrue(false, "ITextViewer not supported"); //$NON-NLS-1$ |
| return null; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getCompletionProposalAutoActivationCharacters() |
| */ |
| public char[] getCompletionProposalAutoActivationCharacters() { |
| return fProposalAutoActivationSet; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getContextInformationAutoActivationCharacters() |
| */ |
| public char[] getContextInformationAutoActivationCharacters() { |
| return null; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getErrorMessage() |
| */ |
| public String getErrorMessage() { |
| return null; |
| } |
| |
| /* |
| * @see org.eclipse.jface.text.contentassist.IContentAssistProcessor#getContextInformationValidator() |
| */ |
| public IContextInformationValidator getContextInformationValidator() { |
| return null; //no context |
| } |
| |
| /* |
| * @see ISubjectControlContentAssistProcessor#computeContextInformation(IContentAssistSubjectControl, int) |
| */ |
| public IContextInformation[] computeContextInformation(IContentAssistSubjectControl contentAssistSubjectControl, |
| int documentOffset) { |
| return null; |
| } |
| |
| /* |
| * @see ISubjectControlContentAssistProcessor#computeCompletionProposals(IContentAssistSubjectControl, int) |
| */ |
| public ICompletionProposal[] computeCompletionProposals(IContentAssistSubjectControl contentAssistSubjectControl, int documentOffset) { |
| if (fPackageFragmentRoot == null) |
| return null; |
| String input= contentAssistSubjectControl.getDocument().get(); |
| ICompletionProposal[] proposals= createPackagesProposals(documentOffset, input); |
| Arrays.sort(proposals, fComparator); |
| return proposals; |
| } |
| |
| public void setPackageFragmentRoot(IPackageFragmentRoot packageFragmentRoot) { |
| fPackageFragmentRoot= packageFragmentRoot; |
| } |
| |
| private ICompletionProposal[] createPackagesProposals(int documentOffset, String input) { |
| ArrayList proposals= new ArrayList(); |
| String prefix= input.substring(0, documentOffset); |
| try { |
| IJavaElement[] packageFragments= fPackageFragmentRoot.getChildren(); |
| for (int i= 0; i < packageFragments.length; i++) { |
| IPackageFragment pack= (IPackageFragment) packageFragments[i]; |
| String packName= pack.getElementName(); |
| if (packName.length() == 0 || ! packName.startsWith(prefix)) |
| continue; |
| Image image= fLabelProvider.getImage(pack); |
| JavaCompletionProposal proposal= new JavaCompletionProposal(packName, 0, input.length(), image, fLabelProvider.getText(pack), 0); |
| proposals.add(proposal); |
| } |
| } catch (JavaModelException e) { |
| //fPackageFragmentRoot is not a proper root -> no proposals |
| } |
| return (ICompletionProposal[]) proposals.toArray(new ICompletionProposal[proposals.size()]); |
| } |
| } |