package com.javadude.antlr4.builder.builder;
import java.util.Iterator;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;
public class ToggleNatureAction implements IObjectActionDelegate {
private ISelection selection;
public void run(IAction action) {
if (selection instanceof IStructuredSelection) {
for (@SuppressWarnings("unchecked") Iterator<Object> it = ((IStructuredSelection) selection).iterator(); it.hasNext();) {
Object element = it.next();
IProject project = null;
if (element instanceof IProject) {
project = (IProject) element;
} else if (element instanceof IAdaptable) {
project = (IProject) ((IAdaptable) element)
.getAdapter(IProject.class);
}
if (project != null) {
toggleNature(project);
}
}
}
}
public void selectionChanged(IAction action, ISelection selection) {
this.selection = selection;
}
public void setActivePart(IAction action, IWorkbenchPart targetPart) {
}
private void toggleNature(IProject project) {
try {
IProjectDescription description = project.getDescription();
String[] natures = description.getNatureIds();
for (int i = 0; i < natures.length; ++i) {
if (Antlr4Nature.NATURE_ID.equals(natures[i])) {
// Remove the nature
String[] newNatures = new String[natures.length - 1];
System.arraycopy(natures, 0, newNatures, 0, i);
System.arraycopy(natures, i + 1, newNatures, i,
natures.length - i - 1);
description.setNatureIds(newNatures);
project.setDescription(description, null);
return;
}
}
// Add the nature
String[] newNatures = new String[natures.length + 1];
System.arraycopy(natures, 0, newNatures, 1, natures.length);
newNatures[0] = Antlr4Nature.NATURE_ID;
description.setNatureIds(newNatures);
project.setDescription(description, null);
} catch (CoreException e) {
}
}
}