StepIntoActionProvider.java

/*
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package org.netbeans.modules.scala.debugger.projects;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Collections;
import java.util.Set;
import javax.swing.SwingUtilities;
import org.netbeans.api.debugger.ActionsManager;

import org.netbeans.api.debugger.Breakpoint;
import org.netbeans.api.debugger.DebuggerEngine;

import org.netbeans.api.debugger.DebuggerManager;
import org.netbeans.api.debugger.DebuggerManagerListener;
import org.netbeans.api.debugger.Session;
import org.netbeans.api.debugger.Watch;
import org.netbeans.api.debugger.jpda.MethodBreakpoint;
import org.netbeans.api.project.Project;
import org.netbeans.spi.debugger.ActionsProviderSupport;
import org.netbeans.spi.project.ActionProvider;
import org.openide.ErrorManager;
import org.openide.util.WeakListeners;


/**
*
* @author   Jan Jancura
*/
public class StepIntoActionProvider extends ActionsProviderSupport {
    private final static String MIME_TYPE = "text/x-scala";

//    private MethodBreakpoint breakpoint;
    Listener listener;
    
    {
        listener = new Listener ();
        MainProjectManager.getDefault ().addPropertyChangeListener(
                WeakListeners.propertyChange(listener, MainProjectManager.getDefault()));
        DebuggerManager.getDebuggerManager ().addDebuggerListener(
                WeakListeners.create(DebuggerManagerListener.class, listener, DebuggerManager.getDebuggerManager()));
        
        setEnabled (
            ActionsManager.ACTION_STEP_INTO + MIME_TYPE,
            shouldBeEnabled ()
        );
    }
    
    public Set getActions () {
        return Collections.singleton (ActionsManager.ACTION_STEP_INTO + MIME_TYPE);
    }
    
    public void doAction (final Object action) {
        // start debugging of project
        if (!SwingUtilities.isEventDispatchThread()) {
            try {
                SwingUtilities.invokeAndWait(new Runnable() {
                    public void run() {
                        invokeAction();
                    }
                });
            } catch (InterruptedException iex) {
                // Procceed
            } catch (java.lang.reflect.InvocationTargetException itex) {
                ErrorManager.getDefault().notify(itex);
            }
        } else {
            invokeAction();
        }
    }
    
    public void postAction(Object action, Runnable actionPerformedNotifier) {
        // start debugging of project
        invokeAction();
        actionPerformedNotifier.run();
    }
    
    private void invokeAction() {
        ((ActionProvider) MainProjectManager.getDefault ().
            getMainProject ().getLookup ().lookup (
                ActionProvider.class
            )).invokeAction (
                ActionProvider.COMMAND_DEBUG_STEP_INTO, 
                MainProjectManager.getDefault ().getMainProject ().getLookup ()
            );
    }
    
    private boolean shouldBeEnabled () {
        
        // check if current project supports this action
        Project p = MainProjectManager.getDefault ().getMainProject ();
        if (p == null) return false;
        ActionProvider actionProvider = (ActionProvider) p.getLookup ().
            lookup (ActionProvider.class);
        if (actionProvider == null) return false;
        String[] sa = actionProvider.getSupportedActions ();
        int i, k = sa.length;
        for (i = 0; i < k; i++)
            if (ActionProvider.COMMAND_DEBUG_STEP_INTO.equals (sa [i]))
                break;
        if (i == k) return false;
        
        if (DebuggerManager.getDebuggerManager().getDebuggerEngines().length > 0) {
            // Do not enable this non-contextual action when some debugging session is already running.
            return false;
        }
        // check if this action should be enabled
        return actionProvider.isActionEnabled (
            ActionProvider.COMMAND_DEBUG_STEP_INTO,
            MainProjectManager.getDefault ().getMainProject ().getLookup ()
        );
    }
    
    
    private class Listener implements PropertyChangeListener, DebuggerManagerListener {
        
        public void propertyChange (PropertyChangeEvent e) {
            if (e.getSource() instanceof MainProjectManager) {
                doSetEnabled();
            }
        }
        
        public void sessionRemoved (Session session) {}
        public void breakpointAdded (Breakpoint breakpoint) {}
        public void breakpointRemoved (Breakpoint breakpoint) {}
        public Breakpoint[] initBreakpoints () {
            return new Breakpoint [0];
        }
        public void initWatches () {}
        public void sessionAdded (Session session) {}
        public void watchAdded (Watch watch) {}
        public void watchRemoved (Watch watch) {}
        
        public void engineAdded(DebuggerEngine engine) {
            doSetEnabled();
        }
        public void engineRemoved(DebuggerEngine engine) {
            doSetEnabled();
        }
        
        private void doSetEnabled() {
            setEnabled (
                ActionsManager.ACTION_STEP_INTO + MIME_TYPE,
                shouldBeEnabled ()
            );
        }
    }
}