| /******************************************************************************* |
| * 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.text.java.hover; |
| |
| |
| import org.eclipse.swt.SWT; |
| import org.eclipse.swt.widgets.Shell; |
| |
| import org.eclipse.jface.text.DefaultInformationControl; |
| import org.eclipse.jface.text.IInformationControl; |
| import org.eclipse.jface.text.IInformationControlCreator; |
| import org.eclipse.jface.text.IRegion; |
| import org.eclipse.jface.text.ITextViewer; |
| import org.eclipse.jface.text.information.IInformationProvider; |
| import org.eclipse.jface.text.information.IInformationProviderExtension2; |
| |
| import org.eclipse.ui.IEditorPart; |
| import org.eclipse.ui.IPartListener; |
| import org.eclipse.ui.IPerspectiveDescriptor; |
| import org.eclipse.ui.IWorkbenchPage; |
| import org.eclipse.ui.IWorkbenchPart; |
| import org.eclipse.ui.IWorkbenchWindow; |
| |
| import org.eclipse.jdt.ui.text.java.hover.IJavaEditorTextHover; |
| |
| import org.eclipse.jdt.internal.ui.text.HTMLTextPresenter; |
| import org.eclipse.jdt.internal.ui.text.JavaWordFinder; |
| |
| |
| public class JavaInformationProvider implements IInformationProvider, IInformationProviderExtension2 { |
| |
| class EditorWatcher implements IPartListener { |
| |
| /** |
| * @see IPartListener#partOpened(IWorkbenchPart) |
| */ |
| public void partOpened(IWorkbenchPart part) { |
| } |
| |
| /** |
| * @see IPartListener#partDeactivated(IWorkbenchPart) |
| */ |
| public void partDeactivated(IWorkbenchPart part) { |
| } |
| |
| /** |
| * @see IPartListener#partClosed(IWorkbenchPart) |
| */ |
| public void partClosed(IWorkbenchPart part) { |
| if (part == fEditor) { |
| fEditor.getSite().getWorkbenchWindow().getPartService().removePartListener(fPartListener); |
| fPartListener= null; |
| } |
| } |
| |
| /** |
| * @see IPartListener#partActivated(IWorkbenchPart) |
| */ |
| public void partActivated(IWorkbenchPart part) { |
| update(); |
| } |
| |
| public void partBroughtToTop(IWorkbenchPart part) { |
| update(); |
| } |
| } |
| |
| protected IEditorPart fEditor; |
| protected IPartListener fPartListener; |
| |
| protected String fCurrentPerspective; |
| protected IJavaEditorTextHover fImplementation; |
| |
| /** |
| * The presentation control creator. |
| * |
| * @since 3.2 |
| */ |
| private IInformationControlCreator fPresenterControlCreator; |
| |
| |
| |
| public JavaInformationProvider(IEditorPart editor) { |
| |
| fEditor= editor; |
| |
| if (fEditor != null) { |
| |
| fPartListener= new EditorWatcher(); |
| IWorkbenchWindow window= fEditor.getSite().getWorkbenchWindow(); |
| window.getPartService().addPartListener(fPartListener); |
| |
| update(); |
| } |
| } |
| |
| protected void update() { |
| |
| IWorkbenchWindow window= fEditor.getSite().getWorkbenchWindow(); |
| IWorkbenchPage page= window.getActivePage(); |
| if (page != null) { |
| |
| IPerspectiveDescriptor perspective= page.getPerspective(); |
| if (perspective != null) { |
| String perspectiveId= perspective.getId(); |
| |
| if (fCurrentPerspective == null || fCurrentPerspective != perspectiveId) { |
| fCurrentPerspective= perspectiveId; |
| |
| fImplementation= new JavaTypeHover(); |
| fImplementation.setEditor(fEditor); |
| } |
| } |
| } |
| } |
| |
| /* |
| * @see IInformationProvider#getSubject(ITextViewer, int) |
| */ |
| public IRegion getSubject(ITextViewer textViewer, int offset) { |
| |
| if (textViewer != null) |
| return JavaWordFinder.findWord(textViewer.getDocument(), offset); |
| |
| return null; |
| } |
| |
| /* |
| * @see IInformationProvider#getInformation(ITextViewer, IRegion) |
| */ |
| public String getInformation(ITextViewer textViewer, IRegion subject) { |
| if (fImplementation != null) { |
| String s= fImplementation.getHoverInfo(textViewer, subject); |
| if (s != null && s.trim().length() > 0) { |
| return s; |
| } |
| } |
| |
| return null; |
| } |
| |
| /* |
| * @see IInformationProviderExtension2#getInformationPresenterControlCreator() |
| * @since 3.1 |
| */ |
| public IInformationControlCreator getInformationPresenterControlCreator() { |
| if (fPresenterControlCreator == null) { |
| fPresenterControlCreator= new AbstractReusableInformationControlCreator() { |
| |
| /* |
| * @see org.eclipse.jdt.internal.ui.text.java.hover.AbstractReusableInformationControlCreator#doCreateInformationControl(org.eclipse.swt.widgets.Shell) |
| */ |
| public IInformationControl doCreateInformationControl(Shell parent) { |
| int shellStyle= SWT.RESIZE | SWT.TOOL; |
| int style= SWT.V_SCROLL | SWT.H_SCROLL; |
| if (BrowserInformationControl.isAvailable(parent)) |
| return new BrowserInformationControl(parent, shellStyle, style); |
| else |
| return new DefaultInformationControl(parent, shellStyle, style, new HTMLTextPresenter(false)); |
| } |
| }; |
| } |
| return fPresenterControlCreator; |
| } |
| } |