From 8e830a95deac0aa9fa0e1eacbed699947a1ac0ad Mon Sep 17 00:00:00 2001
From: Iliya Katueshenock <modormoder@gmail.com>
Date: Wed, 24 Apr 2024 17:03:55 +0200
Subject: [PATCH] Nodes: Add default socket value to tooltip of socket

Even if node is not used, socket value is still there.
This value can be placed in tooltip instead of evaluated one.

Pull Request: https://projects.blender.org/blender/blender/pulls/120497
---
 .../blender/editors/space_node/node_draw.cc   | 40 +++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/source/blender/editors/space_node/node_draw.cc b/source/blender/editors/space_node/node_draw.cc
index 794031c7057..0f49cddcdc1 100644
--- a/source/blender/editors/space_node/node_draw.cc
+++ b/source/blender/editors/space_node/node_draw.cc
@@ -1583,6 +1583,31 @@ static void create_inspection_string_for_geometry_socket(std::stringstream &ss,
   }
 }
 
+static void create_inspection_string_for_default_socket_value(const bNodeSocket &socket,
+                                                              std::stringstream &ss)
+{
+  if (!socket.is_input()) {
+    return;
+  }
+  if (socket.is_directly_linked()) {
+    return;
+  }
+  if (const nodes::SocketDeclaration *socket_decl = socket.runtime->declaration) {
+    if (socket_decl->input_field_type == nodes::InputSocketFieldType::Implicit) {
+      return;
+    }
+  }
+  if (socket.typeinfo->base_cpp_type == nullptr) {
+    return;
+  }
+
+  const CPPType &value_type = *socket.typeinfo->base_cpp_type;
+  BUFFER_FOR_CPP_TYPE_VALUE(value_type, socket_value);
+  socket.typeinfo->get_base_cpp_value(socket.default_value, socket_value);
+  create_inspection_string_for_generic_value(socket, GPointer(value_type, socket_value), ss);
+  value_type.destruct(socket_value);
+}
+
 static std::optional<std::string> create_description_inspection_string(const bNodeSocket &socket)
 {
   if (socket.runtime->declaration == nullptr) {
@@ -1732,6 +1757,18 @@ static std::optional<std::string> create_multi_input_log_inspection_string(
   return str;
 }
 
+static std::optional<std::string> create_default_value_inspection_string(const bNodeSocket &socket)
+{
+  std::stringstream ss;
+  create_inspection_string_for_default_socket_value(socket, ss);
+
+  std::string str = ss.str();
+  if (str.empty()) {
+    return std::nullopt;
+  }
+  return str;
+}
+
 static std::string node_socket_get_tooltip(const SpaceNode *snode,
                                            const bNodeTree &ntree,
                                            const bNodeSocket &socket)
@@ -1754,6 +1791,9 @@ static std::string node_socket_get_tooltip(const SpaceNode *snode,
   if (std::optional<std::string> info = create_log_inspection_string(geo_tree_log, socket)) {
     inspection_strings.append(std::move(*info));
   }
+  else if (std::optional<std::string> info = create_default_value_inspection_string(socket)) {
+    inspection_strings.append(std::move(*info));
+  }
   else if (std::optional<std::string> info = create_multi_input_log_inspection_string(
                ntree, socket, tree_draw_ctx))
   {