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/*******************************************************************************
* Copyright (c) 2007, 2008 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.equinox.internal.p2.ui.actions;
import org.eclipse.equinox.internal.p2.ui.ProvUI;
import org.eclipse.equinox.p2.operations.ProvisioningSession;
import org.eclipse.equinox.p2.ui.Policy;
import org.eclipse.equinox.p2.ui.ProvisioningUI;
import org.eclipse.jface.viewers.*;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.actions.SelectionProviderAction;
public abstract class ProvisioningAction extends SelectionProviderAction {
ProvisioningUI ui;
protected ProvisioningAction(ProvisioningUI ui, String text, ISelectionProvider selectionProvider) {
super(selectionProvider, text);
this.ui = ui;
}
/*
* perform initialization that should be done after creation.
*/
protected void init() {
// prime the selection validation
ISelection selection = getSelection();
if (selection instanceof IStructuredSelection) {
selectionChanged((IStructuredSelection) selection);
} else {
selectionChanged(selection);
}
}
protected Shell getShell() {
return ProvUI.getDefaultParentShell();
}
/*
* Overridden to use the selection from the selection provider, not the one
* from the triggering event. Some selection providers reinterpret the raw selections
* (non-Javadoc)
* @see org.eclipse.ui.actions.SelectionProviderAction#selectionChanged(org.eclipse.jface.viewers.IStructuredSelection)
*/
public final void selectionChanged(IStructuredSelection selection) {
ISelection providerSelection = getSelectionProvider().getSelection();
if (providerSelection instanceof IStructuredSelection) {
checkEnablement(((IStructuredSelection) providerSelection).toArray());
} else {
// shouldn't really happen, but a provider could decide to de-structure the selection
selectionChanged(providerSelection);
}
}
protected void checkEnablement(Object[] selections) {
// Default is to nothing
}
/**
* Recheck the enablement. Called by clients when some condition outside of
* the action that may effect its enablement should be changed.
*/
public final void checkEnablement() {
ISelection selection = getSelection();
if (selection instanceof IStructuredSelection) {
checkEnablement(((IStructuredSelection) selection).toArray());
} else {
selectionChanged(selection);
}
}
protected ProvisioningSession getSession() {
return ui.getSession();
}
protected Policy getPolicy() {
return ui.getPolicy();
}
protected ProvisioningUI getProvisioningUI() {
return ui;
}
}
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