RubyBreakpointActionProvider.java

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package org.netbeans.modules.ruby.debugger.breakpoints;

import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.util.Collections;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.netbeans.api.debugger.ActionsManager;
import org.netbeans.api.debugger.DebuggerManager;
import org.netbeans.modules.ruby.debugger.EditorUtil;
import org.netbeans.modules.ruby.debugger.Util;
import org.netbeans.spi.debugger.ActionsProvider.Registration;
import org.netbeans.spi.debugger.ActionsProviderSupport;
import org.netbeans.spi.debugger.ui.EditorContextDispatcher;
import org.openide.text.Line;
import org.openide.util.WeakListeners;
import org.rubyforge.debugcommons.RubyDebuggerException;

/**
 * Provides actions for adding and removing Ruby breakpoints.
 */
@Registration(actions={"toggleBreakpoint"}, activateForMIMETypes={"text/x-ruby", "application/x-httpd-eruby"})
public final class RubyBreakpointActionProvider extends ActionsProviderSupport
        implements PropertyChangeListener {
    
    private static final Logger LOGGER = Logger.getLogger(RubyBreakpointActionProvider.class.getName());

    private final static Set<Object> ACTIONS =
            Collections.singleton(ActionsManager.ACTION_TOGGLE_BREAKPOINT);
    
    public RubyBreakpointActionProvider() {
        setEnabled(ActionsManager.ACTION_TOGGLE_BREAKPOINT, false);
        PropertyChangeListener l = WeakListeners.propertyChange(this, EditorContextDispatcher.getDefault());
        EditorContextDispatcher.getDefault().addPropertyChangeListener(Util.RUBY_MIME_TYPE, l);
        EditorContextDispatcher.getDefault().addPropertyChangeListener(Util.ERB_MIME_TYPE, l);
    }
    
    @Override
    public Set<Object> getActions() {
        return ACTIONS;
    }
    
    @Override
    public void doAction(Object action) {
        RubyBreakpoint breakpoint = RubyBreakpointManager.getCurrentLineBreakpoint();
        if (breakpoint != null) {
            DebuggerManager.getDebuggerManager().removeBreakpoint(breakpoint);
        } else { // new breakpoint
            try {
                Line line = EditorUtil.getCurrentLine();
                if (line != null) {
                    RubyBreakpointManager.addLineBreakpoint(line);
                }
            } catch (RubyDebuggerException e) {
                LOGGER.log(Level.WARNING, "Unable to add breakpoint: " + e.getLocalizedMessage(), e);
            }
        }
    }
    
    public void propertyChange(PropertyChangeEvent evt) {
        boolean enabled = EditorUtil.getCurrentLine() != null;
        setEnabled(ActionsManager.ACTION_TOGGLE_BREAKPOINT, enabled);
    }
    
}