implement supports for hovers in debug adapter

Author: d-biehl

robotcode/debug_adapter/launcher/debugger.py

@@ -672,13 +672,24 @@ def evaluate(
         if evaluate_context is None:
             evaluate_context = EXECUTION_CONTEXTS.current
 
+        if context in [EvaluateArgumentContext.HOVER]:
+            expression = f"${expression}"
         try:
-            vars = evaluate_context.variables.current if frame_id is not None else evaluate_context.variables._global
-            if self.VARS_RE.match(expression.strip()):
-                result = vars.replace_string(expression)
+            if expression:
+                vars = (
+                    evaluate_context.variables.current if frame_id is not None else evaluate_context.variables._global
+                )
+                if self.VARS_RE.match(expression.strip()):
+                    result = vars.replace_string(expression)
+                else:
+                    result = evaluate_expression(vars.replace_string(expression), vars.store)
             else:
-                result = evaluate_expression(vars.replace_string(expression), vars.store)
+                return EvaluateResult("")
+
         except BaseException as e:
-            result = e
+            if context in [EvaluateArgumentContext.HOVER]:
+                return EvaluateResult("")
+            else:
+                result = e
 
         return EvaluateResult(repr(result), repr(type(result)))

robotcode/debug_adapter/launcher/server.py

@@ -217,6 +217,7 @@ async def _evaluate(
         frame_id: Optional[int] = None,
         context: Union[EvaluateArgumentContext, str, None] = None,
         format: Optional[ValueFormat] = None,
+        **kwargs: Any,
     ) -> EvaluateResponseBody:
         result = Debugger.instance().evaluate(expression, frame_id, context, format)
         return EvaluateResponseBody(

robotcode/debug_adapter/server.py

@@ -82,6 +82,7 @@ async def _initialize(self, arguments: InitializeRequestArguments) -> Capabiliti
             # supports_hit_conditional_breakpoints=True,
             support_terminate_debuggee=True,
             support_suspend_debuggee=True,
+            supports_evaluate_for_hovers=True,
             # supports_loaded_sources_request=True,
             supports_terminate_request=True,
             # supports_data_breakpoints=True