Index: debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/resources/mf-layer.xml
===================================================================
RCS file: /cvs/debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/resources/mf-layer.xml,v
retrieving revision 1.33
diff -u -u -r1.33 mf-layer.xml
--- debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/resources/mf-layer.xml	25 Jul 2006 10:28:35 -0000	1.33
+++ debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/resources/mf-layer.xml	18 Aug 2006 17:30:36 -0000
@@ -20,6 +20,15 @@
 <!DOCTYPE filesystem PUBLIC "-//NetBeans//DTD Filesystem 1.0//EN" "http://www.netbeans.org/dtds/filesystem-1_0.dtd">
 
 <filesystem>
+    <!-- Mark Java sources as debuggable -->
+    <folder name="Debugging">
+        <folder name="Breakpoints">
+            <folder name="text">
+                <folder name="x-java" />
+            </folder>
+        </folder>
+    </folder>
+
     <folder name="Editors">
         <folder name="text">
             <folder name="x-java">
Index: debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/ui/actions/ToggleBreakpointActionProvider.java
===================================================================
RCS file: /cvs/debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/ui/actions/ToggleBreakpointActionProvider.java,v
retrieving revision 1.12
diff -u -u -r1.12 ToggleBreakpointActionProvider.java
--- debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/ui/actions/ToggleBreakpointActionProvider.java	30 Jun 2006 19:05:06 -0000	1.12
+++ debuggerjpda/ui/src/org/netbeans/modules/debugger/jpda/ui/actions/ToggleBreakpointActionProvider.java	18 Aug 2006 17:30:36 -0000
@@ -37,6 +37,7 @@
 import org.netbeans.modules.debugger.jpda.ui.breakpoints.BreakpointAnnotationListener;
 import org.netbeans.spi.debugger.ActionsProviderSupport;
 import org.openide.filesystems.FileObject;
+import org.openide.filesystems.Repository;
 import org.openide.filesystems.URLMapper;
 
 import org.openide.util.NbBundle;
@@ -76,12 +77,15 @@
         } catch (MalformedURLException muex) {
             fo = null;
         }
-        setEnabled (
-            ActionsManager.ACTION_TOGGLE_BREAKPOINT,
-            (EditorContextBridge.getCurrentLineNumber () >= 0) && 
-            (fo != null && "text/x-java".equals(fo.getMIMEType()))  // NOI18N
-            //(EditorContextBridge.getCurrentURL ().endsWith (".java"))
-        );
+
+        // Take a look in the System File System and see if anybody has registered debuggability
+        // for this MIME type
+        boolean isDebuggableFile = fo != null && Repository.getDefault().getDefaultFileSystem().
+                findResource("Debugging/Breakpoints/" + fo.getMIMEType()) != null; // NOI18N
+        //OLD: boolean isDebuggableFile = (fo != null && "text/x-java".equals(fo.getMIMEType())); // NOI18N        
+
+        setEnabled(ActionsManager.ACTION_TOGGLE_BREAKPOINT,
+                   isDebuggableFile && (EditorContextBridge.getCurrentLineNumber () >= 0));
         if ( debugger != null && 
              debugger.getState () == debugger.STATE_DISCONNECTED
         )