plugins/net.mograsim.plugin.core/src/net/mograsim/plugin/launch/MachineDebugContextListener.java

   1 package net.mograsim.plugin.launch;
   2
   3 import java.util.Optional;
   4
   5 import org.eclipse.debug.core.ILaunch;
   6 import org.eclipse.debug.core.model.IDebugElement;
   7 import org.eclipse.debug.core.model.IDebugTarget;
   8 import org.eclipse.debug.ui.contexts.DebugContextEvent;
   9 import org.eclipse.debug.ui.contexts.IDebugContextListener;
  10 import org.eclipse.jface.viewers.ISelection;
  11 import org.eclipse.jface.viewers.TreeSelection;
  12
  13 public abstract class MachineDebugContextListener implements IDebugContextListener
  14 {
  15         private MachineDebugTarget debugTarget;
  16
  17         @Override
  18         public void debugContextChanged(DebugContextEvent e)
  19         {
  20                 debugContextChanged(e.getContext());
  21         }
  22
  23         public void debugContextChanged(ISelection selection)
  24         {
  25                 if (selection != null && selection instanceof TreeSelection)
  26                 {
  27                         TreeSelection treeSelection = (TreeSelection) selection;
  28                         Object[] selectedElements = treeSelection.toArray();
  29                         for (Object selectedElement : selectedElements)
  30                         {
  31                                 IDebugTarget debugTarget;
  32                                 if (selectedElement instanceof IDebugElement)
  33                                         debugTarget = ((IDebugElement) selectedElement).getDebugTarget();
  34                                 else if (selectedElement instanceof ILaunch)
  35                                         debugTarget = ((ILaunch) selectedElement).getDebugTarget();
  36                                 else
  37                                         continue;
  38                                 if (!(debugTarget instanceof MachineDebugTarget))
  39                                         continue;
  40                                 if (debugTarget.isTerminated())
  41                                         continue;
  42                                 // we found a selected MachineDebugTarget
  43                                 if (this.debugTarget != debugTarget)
  44                                         updateContextAndCallContextChanged((MachineDebugTarget) debugTarget);
  45                                 return;
  46                         }
  47                 }
  48                 // we didn't find a selected MachineDebugTarget
  49                 updateContextAndCallContextChanged(null);
  50         }
  51
  52         private void updateContextAndCallContextChanged(MachineDebugTarget newTarget)
  53         {
  54                 MachineDebugTarget oldTarget = this.debugTarget;
  55                 this.debugTarget = newTarget;
  56                 machineDebugContextChanged(Optional.ofNullable(oldTarget), Optional.ofNullable(newTarget));
  57         }
  58
  59         public abstract void machineDebugContextChanged(Optional<MachineDebugTarget> oldTarget, Optional<MachineDebugTarget> newTarget);
  60 }