leave temporary hint for the nasal init block, so that it can access

its own data, and can distinguish itself from other instances of the
same js driver. This property is removed after script execution.
Example:

  self = props.globals.getNode(getprop("/input/joysticks/this"));

diff --git a/src/Input/input.cxx b/src/Input/input.cxx
index 799fd50e0a62dd2581d1b0c5b9c37266743db407..4f8926da5cde95103a5e434a791c92a2442e2be7 100644 (file)
--- a/src/Input/input.cxx
+++ b/src/Input/input.cxx
@@ -466,7 +466,7 @@ FGInput::_init_joystick ()
 
       if ((named = jsmap[name])) {
         string source = named->getStringValue("source", "user defined");
-        SG_LOG(SG_INPUT, SG_INFO, "... found joystick: \"" << source << '"');
+        SG_LOG(SG_INPUT, SG_INFO, "... found joystick: " << source);
 
       } else if ((named = jsmap["default"])) {
         string source = named->getStringValue("source", "user defined");
@@ -474,7 +474,8 @@ FGInput::_init_joystick ()
             << "\"\nUsing default: \"" << source << '"');
 
       } else {
-        throw sg_throwable(string("No joystick configuration file with <name>default</name> entry found!"));
+        throw sg_throwable(string("No joystick configuration file with "
+            "<name>default</name> entry found!"));
       }
 
       js_node = js_nodes->getChild("js", i, true);
@@ -603,12 +604,17 @@ FGInput::_init_joystick ()
 void
 FGInput::_postinit_joystick()
 {
-  vector<SGPropertyNode_ptr> js = fgGetNode("/input/joysticks")->getChildren("js");
+  SGPropertyNode *js_nodes = fgGetNode("/input/joysticks");
+  vector<SGPropertyNode_ptr> js = js_nodes->getChildren("js");
   for (unsigned int i = 0; i < js.size(); i++) {
+    // leave temporary hint for the nasal init block
+    js_nodes->setStringValue("this", js[i]->getPath());
+
     vector<SGPropertyNode_ptr> nasal = js[i]->getChildren("nasal");
     for (unsigned int j = 0; j < nasal.size(); j++)
       ((FGNasalSys*)globals->get_subsystem("nasal"))->handleCommand(nasal[j]);
   }
+  js_nodes->removeChild("this", 0);
 }