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/*******************************************************************************
* Copyright (c) 2000, 2009 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.team.examples.pessimistic.ui;
import java.lang.reflect.InvocationTargetException;
import java.util.*;
import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.dialogs.ProgressMonitorDialog;
import org.eclipse.jface.operation.IRunnableWithProgress;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.team.core.RepositoryProvider;
import org.eclipse.team.examples.pessimistic.PessimisticFilesystemProvider;
import org.eclipse.team.examples.pessimistic.PessimisticFilesystemProviderPlugin;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
/**
* Abstract base action implementation for all pessimistic provider actions.
* Provides convenience methods an abstractions.
*/
public abstract class PessimisticProviderAction
implements IObjectActionDelegate {
/*
* The current selection.
*/
protected ISelection fSelection;
/*
* The current shell.
*/
protected Shell fShell;
/*
* @see org.eclipse.ui.IActionDelegate#selectionChanged(IAction, ISelection)
*/
public void selectionChanged(IAction action, ISelection selection) {
fSelection = selection;
boolean enabled= action.isEnabled();
if (enabled != checkEnablement()) {
action.setEnabled(!enabled);
}
}
/*
* @see org.eclipse.ui.IObjectActionDelegate#setActivePart(IAction, IWorkbenchPart)
*/
public void setActivePart(IAction action, IWorkbenchPart part) {
fShell= part.getSite().getShell();
}
/**
* Answers <code>true</code> if this action should be enabled
* for the given <code>resource</code>.
*/
protected abstract boolean shouldEnableFor(IResource resource);
/*
* Checks to see if this action should be enabled.
*/
protected boolean checkEnablement() {
IResource[] resources= getSelectedResources();
if (resources == null || resources.length == 0) {
return false;
}
boolean enabled= false;
for(int i= 0; !enabled && i < resources.length; i++) {
if (shouldEnableFor(resources[i])) {
enabled= true;
}
}
return enabled;
}
/**
* Convenience method to get an array of resources from the selection.
*/
protected IResource[] getSelectedResources() {
ArrayList resources = null;
if (!fSelection.isEmpty()) {
resources = new ArrayList();
Iterator elements = ((IStructuredSelection) fSelection).iterator();
while (elements.hasNext()) {
Object next = elements.next();
if (next instanceof IResource) {
resources.add(next);
continue;
}
if (next instanceof IAdaptable) {
IAdaptable a = (IAdaptable) next;
Object adapter = a.getAdapter(IResource.class);
if (adapter instanceof IResource) {
resources.add(adapter);
continue;
}
}
}
}
if (resources != null && !resources.isEmpty()) {
IResource[] result = new IResource[resources.size()];
resources.toArray(result);
return result;
}
return new IResource[0];
}
/**
* Convenience method which answers <code>true</code> if the
* resource is controlled by a <code>PessimisticFilesystemProvider</code>.
*/
protected boolean isControlled(IResource resource) {
PessimisticFilesystemProvider provider= getProvider(resource);
if (provider == null)
return false;
return provider.isControlled(resource);
}
/**
* Convenience method which answers <code>true</code> if and only if the
* resource is controlled by a <code>PessimisticFilesystemProvider</code>
* and is checked out.
*/
protected boolean isCheckedOut(IResource resource) {
PessimisticFilesystemProvider provider= getProvider(resource);
if (provider == null)
return false;
return provider.isCheckedout(resource);
}
/**
* Convenience method which answers <code>true</code> if and only if the
* resource is controlled by a <code>PessimisticFilesystemProvider</code>
* and the resource is ignored.
*/
protected boolean isIgnored(IResource resource) {
PessimisticFilesystemProvider provider= getProvider(resource);
if (provider == null)
return false;
return provider.isIgnored(resource);
}
/**
* Convenience method which answers the <code>PessimisticFilesystemProvider</code>
* for the given <code>resource</code> or <code>null</code> if the
* <code>resource</code> is not associated with a <code>PessimisticFilesystemProvider</code>.
*/
protected PessimisticFilesystemProvider getProvider(IResource resource) {
if (resource == null) {
return null;
}
IProject project= resource.getProject();
if (project == null) {
return null;
}
return (PessimisticFilesystemProvider)RepositoryProvider.getProvider(project, PessimisticFilesystemProviderPlugin.NATURE_ID);
}
/**
* Convenience method which walks a resource tree and collects the
* resources that this action would enable for.
*/
protected void recursivelyAdd(IResource resource, Set resources) {
if (isControlled(resource) && !isIgnored(resource)) {
if (shouldEnableFor(resource)) {
resources.add(resource);
}
if (resource instanceof IContainer) {
IContainer container = (IContainer) resource;
IResource[] members= null;
try {
members = container.members();
} catch (CoreException e) {
PessimisticFilesystemProviderPlugin.getInstance().logError(e, "Exception traversing members");
}
if (members != null) {
for (int i = 0; i < members.length; i++) {
recursivelyAdd(members[i], resources);
}
}
}
}
}
/**
* Convenience method which sorts the given <code>resources</code>
* into a map of IProject -> Set of IResource objects.
*/
protected Map sortByProject(Set resources) {
Map byProject= new HashMap();
if (resources != null) {
for (Iterator i= resources.iterator(); i.hasNext();) {
IResource resource= (IResource) i.next();
IProject project= resource.getProject();
Set set= (Set)byProject.get(project);
if (set == null) {
set= new HashSet(1);
byProject.put(project, set);
}
set.add(resource);
}
}
return byProject;
}
/**
* Convenience method for displaying runnable progress
* with a <code>ProgressMonitorDialog</code>.
*/
protected void runWithProgressDialog(IRunnableWithProgress runnable) {
try {
new ProgressMonitorDialog(fShell).run(true, false, runnable);
} catch (InvocationTargetException e) {
PessimisticFilesystemProviderPlugin.getInstance().logError(e, "Problems running action " + this);
} catch (InterruptedException e) {
PessimisticFilesystemProviderPlugin.getInstance().logError(e, "Problems running action " + this);
}
}
}
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