plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/nature/AddRemoveMograsimNatureHandler.java

   1 package net.mograsim.plugin.nature;
   2
   3 import java.util.Iterator;
   4
   5 import org.eclipse.core.commands.AbstractHandler;
   6 import org.eclipse.core.commands.ExecutionEvent;
   7 import org.eclipse.core.commands.ExecutionException;
   8 import org.eclipse.core.resources.IProject;
   9 import org.eclipse.core.resources.IProjectDescription;
  10 import org.eclipse.core.runtime.CoreException;
  11 import org.eclipse.core.runtime.IAdaptable;
  12 import org.eclipse.jface.viewers.ISelection;
  13 import org.eclipse.jface.viewers.IStructuredSelection;
  14 import org.eclipse.ui.handlers.HandlerUtil;
  15
  16 public class AddRemoveMograsimNatureHandler extends AbstractHandler
  17 {
  18         @Override
  19         public Object execute(ExecutionEvent event) throws ExecutionException
  20         {
  21                 ISelection selection = HandlerUtil.getCurrentSelection(event);
  22                 //
  23                 if (selection instanceof IStructuredSelection)
  24                 {
  25                         for (Iterator<?> it = ((IStructuredSelection) selection).iterator(); it.hasNext();)
  26                         {
  27                                 Object element = it.next();
  28                                 IProject project = null;
  29                                 if (element instanceof IProject)
  30                                 {
  31                                         project = (IProject) element;
  32                                 } else if (element instanceof IAdaptable)
  33                                 {
  34                                         project = ((IAdaptable) element).getAdapter(IProject.class);
  35                                 }
  36                                 if (project != null)
  37                                 {
  38                                         try
  39                                         {
  40                                                 toggleNature(project);
  41                                         }
  42                                         catch (CoreException e)
  43                                         {
  44                                                 // TODO log something
  45                                                 throw new ExecutionException("Failed to toggle nature", e);
  46                                         }
  47                                 }
  48                         }
  49                 }
  50
  51                 return null;
  52         }
  53
  54         /**
  55          * Toggles sample nature on a project
  56          *
  57          * @param project to have sample nature added or removed
  58          */
  59         private void toggleNature(IProject project) throws CoreException
  60         {
  61                 IProjectDescription description = project.getDescription();
  62                 String[] natures = description.getNatureIds();
  63
  64                 for (int i = 0; i < natures.length; ++i)
  65                 {
  66                         if (MograsimNature.NATURE_ID.equals(natures[i]))
  67                         {
  68                                 // Remove the nature
  69                                 String[] newNatures = new String[natures.length - 1];
  70                                 System.arraycopy(natures, 0, newNatures, 0, i);
  71                                 System.arraycopy(natures, i + 1, newNatures, i, natures.length - i - 1);
  72                                 description.setNatureIds(newNatures);
  73                                 project.setDescription(description, null);
  74                                 return;
  75                         }
  76                 }
  77
  78                 // Add the nature
  79                 String[] newNatures = new String[natures.length + 1];
  80                 System.arraycopy(natures, 0, newNatures, 0, natures.length);
  81                 newNatures[natures.length] = MograsimNature.NATURE_ID;
  82                 description.setNatureIds(newNatures);
  83                 project.setDescription(description, null);
  84         }
  85 }