1 /*******************************************************************************
2 * Copyright (c) 2000, 2004 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Common Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/cpl-v10.html
9 * IBM Corporation - initial API and implementation
10 *******************************************************************************/
11 package net.sourceforge.phpdt.internal.ui.text.java.hover;
14 import net.sourceforge.phpdt.internal.ui.text.JavaWordFinder;
15 import net.sourceforge.phpdt.ui.text.java.hover.IJavaEditorTextHover;
17 import org.eclipse.jface.text.IRegion;
18 import org.eclipse.jface.text.ITextViewer;
19 import org.eclipse.jface.text.information.IInformationProvider;
20 import org.eclipse.ui.IEditorPart;
21 import org.eclipse.ui.IPartListener;
22 import org.eclipse.ui.IPerspectiveDescriptor;
23 import org.eclipse.ui.IWorkbenchPage;
24 import org.eclipse.ui.IWorkbenchPart;
25 import org.eclipse.ui.IWorkbenchWindow;
28 public class JavaInformationProvider implements IInformationProvider {
30 class EditorWatcher implements IPartListener {
33 * @see IPartListener#partOpened(IWorkbenchPart)
35 public void partOpened(IWorkbenchPart part) {
39 * @see IPartListener#partDeactivated(IWorkbenchPart)
41 public void partDeactivated(IWorkbenchPart part) {
45 * @see IPartListener#partClosed(IWorkbenchPart)
47 public void partClosed(IWorkbenchPart part) {
48 if (part == fEditor) {
49 fEditor.getSite().getWorkbenchWindow().getPartService().removePartListener(fPartListener);
55 * @see IPartListener#partActivated(IWorkbenchPart)
57 public void partActivated(IWorkbenchPart part) {
61 public void partBroughtToTop(IWorkbenchPart part) {
66 protected IEditorPart fEditor;
67 protected IPartListener fPartListener;
69 protected String fCurrentPerspective;
70 protected IJavaEditorTextHover fImplementation;
73 public JavaInformationProvider(IEditorPart editor) {
77 if (fEditor != null) {
79 fPartListener= new EditorWatcher();
80 IWorkbenchWindow window= fEditor.getSite().getWorkbenchWindow();
81 window.getPartService().addPartListener(fPartListener);
87 protected void update() {
89 IWorkbenchWindow window= fEditor.getSite().getWorkbenchWindow();
90 IWorkbenchPage page= window.getActivePage();
93 IPerspectiveDescriptor perspective= page.getPerspective();
94 if (perspective != null) {
95 String perspectiveId= perspective.getId();
97 if (fCurrentPerspective == null || fCurrentPerspective != perspectiveId) {
98 fCurrentPerspective= perspectiveId;
100 fImplementation= new JavaTypeHover();
101 fImplementation.setEditor(fEditor);
108 * @see IInformationProvider#getSubject(ITextViewer, int)
110 public IRegion getSubject(ITextViewer textViewer, int offset) {
112 if (textViewer != null)
113 return JavaWordFinder.findWord(textViewer.getDocument(), offset);
119 * @see IInformationProvider#getInformation(ITextViewer, IRegion)
121 public String getInformation(ITextViewer textViewer, IRegion subject) {
122 if (fImplementation != null) {
123 String s= fImplementation.getHoverInfo(textViewer, subject);
124 if (s != null && s.trim().length() > 0)