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/*******************************************************************************
* Copyright (c) 2005 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.wst.sse.ui.internal.selection;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.swt.widgets.Event;
import org.eclipse.ui.IActionDelegate2;
import org.eclipse.ui.IEditorActionDelegate;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IViewActionDelegate;
import org.eclipse.ui.IViewPart;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.wst.sse.ui.internal.SSEUIMessages;
/**
* Selection history action delegate. Keeps track of selection within editor.
*/
public class StructuredSelectHistoryActionDelegate implements IEditorActionDelegate, IActionDelegate2, IViewActionDelegate {
private IEditorPart fEditor;
private SelectionHistory fHistory;
public void dispose() {
fEditor = null;
fHistory = null;
}
public void init(IAction action) {
if (action != null) {
action.setText(SSEUIMessages.StructureSelectHistory_label);
action.setToolTipText(SSEUIMessages.StructureSelectHistory_tooltip);
action.setDescription(SSEUIMessages.StructureSelectHistory_description);
}
}
public void init(IViewPart view) {
// do nothing
}
public void run(IAction action) {
IRegion old = fHistory.getLast();
if (old != null) {
try {
fHistory.ignoreSelectionChanges();
if (fEditor instanceof ITextEditor)
((ITextEditor) fEditor).selectAndReveal(old.getOffset(), old.getLength());
}
finally {
fHistory.listenToSelectionChanges();
}
}
}
public void runWithEvent(IAction action, Event event) {
run(action);
}
public void selectionChanged(IAction action, ISelection selection) {
// do nothing
}
public void setActiveEditor(IAction action, IEditorPart targetEditor) {
fEditor = targetEditor;
if (fEditor != null)
fHistory = (SelectionHistory) fEditor.getAdapter(SelectionHistory.class);
else
fHistory = null;
if (fHistory != null) {
fHistory.setHistoryAction(action);
}
}
}
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