/*******************************************************************************
* Copyright (c) 2000, 2007 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
*
*******************************************************************************/
package org.eclipse.dltk.internal.ui.text.hover;
import org.eclipse.dltk.internal.ui.BrowserInformationControl;
import org.eclipse.dltk.internal.ui.text.HTMLTextPresenter;
import org.eclipse.dltk.internal.ui.text.ScriptWordFinder;
import org.eclipse.dltk.ui.text.hover.IScriptEditorTextHover;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.text.AbstractReusableInformationControlCreator;
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.swt.widgets.Shell;
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.ui.texteditor.ITextEditor;
/**
* Mod from DLTK 3.0 that allows a different fImplementation other than a ScriptTypeHover
*/
public class ScriptInformationProvider_Mod implements IInformationProvider,
IInformationProviderExtension2 {
class EditorWatcher implements IPartListener {
@Override
public void partOpened(IWorkbenchPart part) {
}
@Override
public void partDeactivated(IWorkbenchPart part) {
}
@Override
public void partClosed(IWorkbenchPart part) {
if (part == fEditor) {
fEditor.getSite().getWorkbenchWindow().getPartService()
.removePartListener(fPartListener);
fPartListener = null;
}
}
@Override
public void partActivated(IWorkbenchPart part) {
update();
}
@Override
public void partBroughtToTop(IWorkbenchPart part) {
update();
}
}
protected ITextEditor fEditor;
protected IPartListener fPartListener;
protected String fCurrentPerspective;
protected IScriptEditorTextHover fImplementation;
/**
* The presentation control creator.
*/
private IInformationControlCreator fPresenterControlCreator;
public ScriptInformationProvider_Mod(ITextEditor 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 = createImplementation();
fImplementation.setEditor(fEditor);
}
}
}
}
protected IScriptEditorTextHover createImplementation() {
return new ScriptTypeHover();
}
@Override
public IRegion getSubject(ITextViewer textViewer, int offset) {
if (textViewer != null)
return ScriptWordFinder.findWord(textViewer.getDocument(), offset);
return null;
}
@Override
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;
}
@Override
public IInformationControlCreator getInformationPresenterControlCreator() {
if (fPresenterControlCreator == null) {
fPresenterControlCreator = new AbstractReusableInformationControlCreator() {
@Override
public IInformationControl doCreateInformationControl(
Shell parent) {
if (BrowserInformationControl.isAvailable(parent))
return new BrowserInformationControl(parent,
JFaceResources.DIALOG_FONT, true);
else
return new DefaultInformationControl(parent,
new HTMLTextPresenter(false));
}
};
}
return fPresenterControlCreator;
}
}