--- /dev/null
+package net.mograsim.plugin.nature;
+
+import java.util.Iterator;
+import org.eclipse.core.commands.*;
+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.viewers.ISelection;
+import org.eclipse.jface.viewers.IStructuredSelection;
+import org.eclipse.ui.handlers.HandlerUtil;
+
+public class AddRemoveMograsimNatureHandler extends AbstractHandler
+{
+
+ public Object execute(ExecutionEvent event) throws ExecutionException
+ {
+ ISelection selection = HandlerUtil.getCurrentSelection(event);
+ //
+ if (selection instanceof IStructuredSelection)
+ {
+ for (Iterator<?> 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 = ((IAdaptable) element).getAdapter(IProject.class);
+ }
+ if (project != null)
+ {
+ try
+ {
+ toggleNature(project);
+ }
+ catch (CoreException e)
+ {
+ // TODO log something
+ throw new ExecutionException("Failed to toggle nature", e);
+ }
+ }
+ }
+ }
+
+ return null;
+ }
+
+ /**
+ * Toggles sample nature on a project
+ *
+ * @param project to have sample nature added or removed
+ */
+ private void toggleNature(IProject project) throws CoreException
+ {
+ IProjectDescription description = project.getDescription();
+ String[] natures = description.getNatureIds();
+
+ for (int i = 0; i < natures.length; ++i)
+ {
+ if (MograsimNature.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, 0, natures.length);
+ newNatures[natures.length] = MograsimNature.NATURE_ID;
+ description.setNatureIds(newNatures);
+ project.setDescription(description, null);
+ }
+}
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