| /******************************************************************************* |
| * Copyright (c) 2005, 2012 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 |
| * Paul Fullbright <paul.fullbright@oracle.com> - content assist category enablement - http://bugs.eclipse.org/345213 |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.javaeditor; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.viewers.ISelection; |
| |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| import org.eclipse.jface.text.ITextOperationTarget; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.jface.text.TextUtilities; |
| import org.eclipse.jface.text.source.ISourceViewer; |
| |
| import org.eclipse.ui.IEditorPart; |
| |
| import org.eclipse.ui.texteditor.IDocumentProvider; |
| import org.eclipse.ui.texteditor.ITextEditor; |
| import org.eclipse.ui.texteditor.IUpdate; |
| |
| import org.eclipse.jdt.core.IJavaProject; |
| |
| import org.eclipse.jdt.ui.text.IJavaPartitions; |
| |
| import org.eclipse.jdt.internal.ui.text.java.CompletionProposalCategory; |
| import org.eclipse.jdt.internal.ui.text.java.CompletionProposalComputerRegistry; |
| |
| |
| /** |
| * Action to run content assist on a specific proposal category. |
| * |
| * @since 3.2 |
| */ |
| final class SpecificContentAssistAction extends Action implements IUpdate { |
| /** |
| * The category represented by this action. |
| */ |
| private final CompletionProposalCategory fCategory; |
| /** |
| * The content assist executor. |
| */ |
| private final SpecificContentAssistExecutor fExecutor= new SpecificContentAssistExecutor(CompletionProposalComputerRegistry.getDefault()); |
| /** |
| * The editor. |
| */ |
| private JavaEditor fEditor; |
| |
| /** |
| * Creates a new action for a certain proposal category. |
| * |
| * @param category the completion proposal category |
| */ |
| public SpecificContentAssistAction(CompletionProposalCategory category) { |
| fCategory= category; |
| setText(category.getName()); |
| setImageDescriptor(category.getImageDescriptor()); |
| setActionDefinitionId("org.eclipse.jdt.ui.specific_content_assist.command"); //$NON-NLS-1$ |
| } |
| |
| /* |
| * @see org.eclipse.jface.action.Action#run() |
| */ |
| @Override |
| public void run() { |
| ITextEditor editor= getActiveEditor(); |
| if (editor == null) |
| return; |
| |
| fExecutor.invokeContentAssist(editor, fCategory.getId()); |
| |
| return; |
| } |
| |
| private ITextEditor getActiveEditor() { |
| return fEditor; |
| } |
| |
| /** |
| * Sets the active editor part. |
| * |
| * @param part the editor, possibly <code>null</code> |
| */ |
| public void setActiveEditor(IEditorPart part) { |
| JavaEditor editor; |
| if (part instanceof JavaEditor) |
| editor= (JavaEditor) part; |
| else |
| editor= null; |
| fEditor= editor; |
| setEnabled(computeEnablement(fEditor)); |
| } |
| |
| private boolean computeEnablement(ITextEditor editor) { |
| if (editor == null) |
| return false; |
| |
| ITextOperationTarget target= editor.getAdapter(ITextOperationTarget.class); |
| if (target == null || ! target.canDoOperation(ISourceViewer.CONTENTASSIST_PROPOSALS)) |
| return false; |
| |
| IJavaProject javaProject = EditorUtility.getJavaProject(editor.getEditorInput()); |
| if (! fCategory.matches(javaProject)) |
| return false; |
| |
| ISelection selection= editor.getSelectionProvider().getSelection(); |
| return isValidSelection(selection); |
| } |
| |
| /** |
| * Computes the partition type at the selection start and checks whether the proposal category |
| * has any computers for this partition. |
| * |
| * @param selection the selection |
| * @return <code>true</code> if there are any computers for the selection |
| */ |
| private boolean isValidSelection(ISelection selection) { |
| if (!(selection instanceof ITextSelection)) |
| return false; |
| int offset= ((ITextSelection) selection).getOffset(); |
| |
| IDocument document= getDocument(); |
| if (document == null) |
| return false; |
| |
| String contentType; |
| try { |
| contentType= TextUtilities.getContentType(document, IJavaPartitions.JAVA_PARTITIONING, offset, true); |
| } catch (BadLocationException x) { |
| return false; |
| } |
| |
| return fCategory.hasComputers(contentType); |
| } |
| |
| private IDocument getDocument() { |
| Assert.isTrue(fEditor != null); |
| IDocumentProvider provider= fEditor.getDocumentProvider(); |
| if (provider == null) |
| return null; |
| |
| IDocument document= provider.getDocument(fEditor.getEditorInput()); |
| return document; |
| } |
| |
| /* |
| * @see org.eclipse.ui.texteditor.IUpdate#update() |
| */ |
| @Override |
| public void update() { |
| setEnabled(computeEnablement(fEditor)); |
| } |
| } |