Add terminal-based steering interface via an extract

src/libs/ascent/CMakeLists.txt

@@ -164,6 +164,7 @@ set(ascent_headers
     runtimes/flow_filters/ascent_runtime_trigger_filters.hpp
     runtimes/flow_filters/ascent_runtime_query_filters.hpp
     runtimes/flow_filters/ascent_runtime_command_filters.hpp
+    runtimes/flow_filters/ascent_runtime_steering_filters.hpp
     runtimes/flow_filters/ascent_runtime_vtkh_utils.hpp
     runtimes/flow_filters/ascent_runtime_utils.hpp
     # utils
@@ -230,6 +231,7 @@ set(ascent_sources
     runtimes/flow_filters/ascent_runtime_trigger_filters.cpp
     runtimes/flow_filters/ascent_runtime_query_filters.cpp
     runtimes/flow_filters/ascent_runtime_command_filters.cpp
+    runtimes/flow_filters/ascent_runtime_steering_filters.cpp
     runtimes/flow_filters/ascent_runtime_utils.cpp
     # utils
     utils/ascent_actions_utils.cpp

src/libs/ascent/ascent.cpp

@@ -865,7 +865,8 @@ static std::map<std::string, bool (*)(void)> m_bool_callback_map;
 //-----------------------------------------------------------------------------
 void
 register_callback(const std::string &callback_name,
-                  void (*callback_function)(conduit::Node &, conduit::Node &))
+                  void (*callback_function)
+                  (conduit::Node &, conduit::Node &))
 {
     if (callback_name == "")
     {
@@ -904,7 +905,7 @@ register_callback(const std::string &callback_name,
 
 //-----------------------------------------------------------------------------
 void
-execute_callback(std::string callback_name,
+execute_callback(const std::string &callback_name,
                  conduit::Node &params,
                  conduit::Node &output)
 {
@@ -918,7 +919,7 @@ execute_callback(std::string callback_name,
 
 //-----------------------------------------------------------------------------
 bool
-execute_callback(std::string callback_name)
+execute_callback(const std::string &callback_name)
 {
     if (m_bool_callback_map.count(callback_name) != 1)
     {
@@ -928,6 +929,26 @@ execute_callback(std::string callback_name)
     return callback_function();
 }
 
+//-----------------------------------------------------------------------------
+void
+get_void_callbacks(std::vector<std::string> &callback_names)
+{
+    for (const auto &pair : m_void_callback_map)
+    {
+        callback_names.push_back(pair.first);
+    }
+}
+
+//-----------------------------------------------------------------------------
+void
+get_bool_callbacks(std::vector<std::string> &callback_names)
+{
+    for (const auto &pair : m_bool_callback_map)
+    {
+        callback_names.push_back(pair.first);
+    }
+}
+
 //-----------------------------------------------------------------------------
 void
 reset_callbacks()

src/libs/ascent/ascent.hpp

@@ -74,18 +74,25 @@ void        ASCENT_API about(conduit::Node &node);
 
 //-----------------------------------------------------------------------------
 void        ASCENT_API register_callback(const std::string &callback_name,
-                                         void (*callback_function)(conduit::Node &, conduit::Node &));
+                                         void (*callback_function)
+                                         (conduit::Node &, conduit::Node &));
 //-----------------------------------------------------------------------------
 void        ASCENT_API register_callback(const std::string &callback_name,
                                          bool (*callback_function)(void));
 
 //-----------------------------------------------------------------------------
-void        ASCENT_API execute_callback(std::string callback_name,
+void        ASCENT_API execute_callback(const std::string &callback_name,
                                         conduit::Node &params,
                                         conduit::Node &output);
 
 //-----------------------------------------------------------------------------
-bool        ASCENT_API execute_callback(std::string callback_name);
+bool        ASCENT_API execute_callback(const std::string &callback_name);
+
+//-----------------------------------------------------------------------------
+void        ASCENT_API get_void_callbacks(std::vector<std::string> &callbacks);
+
+//-----------------------------------------------------------------------------
+void        ASCENT_API get_bool_callbacks(std::vector<std::string> &callbacks);
 
 //-----------------------------------------------------------------------------
 void        ASCENT_API reset_callbacks();

src/libs/ascent/runtimes/ascent_main_runtime.cpp

@@ -1077,6 +1077,10 @@ AscentRuntime::ConvertExtractToFlow(const conduit::Node &extract,
     py_src_final << "jupyter_bridge()" << std::endl;
     params["source"] = py_src_final.str();
   }
+  else if(extract_type == "steering")
+  {
+     filter_name = "steering";
+  }
   // generic extract support
   else if(n_extracts.has_child(extract_type))
   {

src/libs/ascent/runtimes/flow_filters/ascent_runtime_filters.cpp

@@ -26,6 +26,7 @@
 #include <ascent_runtime_trigger_filters.hpp>
 #include <ascent_runtime_query_filters.hpp>
 #include <ascent_runtime_command_filters.hpp>
+#include <ascent_runtime_steering_filters.hpp>
 
 #if defined(ASCENT_VTKM_ENABLED)
     #include <ascent_runtime_vtkh_filters.hpp>
@@ -99,6 +100,7 @@ register_builtin()
     AscentRuntime::register_filter_type<BasicQuery>();
     AscentRuntime::register_filter_type<FilterQuery>("transforms","expression");
     AscentRuntime::register_filter_type<Command>();
+    AscentRuntime::register_filter_type<Steering>("extracts");
     AscentRuntime::register_filter_type<DataBinning>("transforms","binning");
     AscentRuntime::register_filter_type<BlueprintPartition>("transforms","partition");
     AscentRuntime::register_filter_type<AddFields>("transforms","add_fields");