From 870254b168e73b277d7eee1efde135066ac2c088 Mon Sep 17 00:00:00 2001
From: Ricardo Subtil <ricasubtil@gmail.com>
Date: Mon, 30 Sep 2024 14:15:09 +0100
Subject: [PATCH] Support object inspection through DAP `evaluate` request

---
 editor/debugger/debug_adapter/debug_adapter_parser.cpp   | 7 +++++--
 editor/debugger/debug_adapter/debug_adapter_protocol.cpp | 4 ++++
 editor/debugger/debug_adapter/debug_adapter_protocol.h   | 1 +
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/editor/debugger/debug_adapter/debug_adapter_parser.cpp b/editor/debugger/debug_adapter/debug_adapter_parser.cpp
index 8e2f037a1c35..02c414f13d1e 100644
--- a/editor/debugger/debug_adapter/debug_adapter_parser.cpp
+++ b/editor/debugger/debug_adapter/debug_adapter_parser.cpp
@@ -492,9 +492,12 @@ Dictionary DebugAdapterParser::req_evaluate(const Dictionary &p_params) const {
 
 	Dictionary args = p_params["arguments"];
 
-	String value = EditorDebuggerNode::get_singleton()->get_var_value(args["expression"]);
+	String eval = args["expression"];
+	String value = EditorDebuggerNode::get_singleton()->get_var_value(eval);
+	HashMap<String, DebugAdapterProtocol::DAPVarID>::ConstIterator variableID = DebugAdapterProtocol::get_singleton()->variable_eval_list.find(eval);
+
 	body["result"] = value;
-	body["variablesReference"] = 0;
+	body["variablesReference"] = variableID ? variableID->value : 0;
 
 	return response;
 }
diff --git a/editor/debugger/debug_adapter/debug_adapter_protocol.cpp b/editor/debugger/debug_adapter/debug_adapter_protocol.cpp
index f8f5584ba6de..51516effa5d8 100644
--- a/editor/debugger/debug_adapter/debug_adapter_protocol.cpp
+++ b/editor/debugger/debug_adapter/debug_adapter_protocol.cpp
@@ -186,6 +186,7 @@ void DebugAdapterProtocol::reset_stack_info() {
 
 	stackframe_list.clear();
 	variable_list.clear();
+	variable_eval_list.clear();
 	object_list.clear();
 	object_pending_set.clear();
 }
@@ -1131,6 +1132,9 @@ void DebugAdapterProtocol::on_debug_stack_frame_var(const Array &p_data) {
 	variable.value = stack_var.value;
 	variable.type = Variant::get_type_name(stack_var.value.get_type());
 	variable.variablesReference = parse_variant(stack_var.value);
+	if (variable.variablesReference != 0) {
+		variable_eval_list.insert(variable.name, variable.variablesReference);
+	}
 
 	variable_list.find(var_id)->value.push_back(variable.to_json());
 	_remaining_vars--;
diff --git a/editor/debugger/debug_adapter/debug_adapter_protocol.h b/editor/debugger/debug_adapter/debug_adapter_protocol.h
index 29d7457ee76f..2a2591bea1b5 100644
--- a/editor/debugger/debug_adapter/debug_adapter_protocol.h
+++ b/editor/debugger/debug_adapter/debug_adapter_protocol.h
@@ -125,6 +125,7 @@ class DebugAdapterProtocol : public Object {
 	List<DAP::Breakpoint> breakpoint_list;
 	HashMap<DAP::StackFrame, List<int>, DAP::StackFrame> stackframe_list;
 	HashMap<DAPVarID, Array> variable_list;
+	HashMap<String, DAPVarID> variable_eval_list;
 
 	HashMap<ObjectID, DAPVarID> object_list;
 	HashSet<ObjectID> object_pending_set;