Geometry Nodes: Display Node Warnings in Modifier

With this commit, node warnings added to nodes during evaluation
(not "Info" warnings) will also draw in the modifier. In the future
there could be a "search for this node" button as well.

Differential Revision: https://developer.blender.org/D11983

source/blender/modifiers/intern/MOD_nodes.cc

@@ -1133,6 +1133,18 @@ static void panel_draw(const bContext *C, Panel *panel)
     }
   }
 
+  /* Draw node warnings. */
+  if (nmd->runtime_eval_log != nullptr) {
+    const geo_log::ModifierLog &log = *static_cast<geo_log::ModifierLog *>(nmd->runtime_eval_log);
+    log.foreach_node_log([layout](const geo_log::NodeLog &node_log) {
+      for (const geo_log::NodeWarning &warning : node_log.warnings()) {
+        if (warning.type != geo_log::NodeWarningType::Info) {
+          uiItemL(layout, warning.message.c_str(), ICON_ERROR);
+        }
+      }
+    });
+  }
+
   modifier_panel_end(layout, ptr);
 }
 

source/blender/nodes/NOD_geometry_nodes_eval_log.hh

@@ -31,6 +31,7 @@
  */
 
 #include "BLI_enumerable_thread_specific.hh"
+#include "BLI_function_ref.hh"
 #include "BLI_linear_allocator.hh"
 #include "BLI_map.hh"
 
@@ -267,6 +268,7 @@ class TreeLog {
   const NodeLog *lookup_node_log(StringRef node_name) const;
   const NodeLog *lookup_node_log(const bNode &node) const;
   const TreeLog *lookup_child_log(StringRef node_name) const;
+  void foreach_node_log(FunctionRef<void(const NodeLog &)> fn) const;
 };
 
 /** Contains information about an entire geometry nodes evaluation. */
@@ -296,6 +298,7 @@ class ModifierLog {
                                                              const bNodeSocket &socket);
   static const NodeLog *find_node_by_spreadsheet_editor_context(
       const SpaceSpreadsheet &sspreadsheet);
+  void foreach_node_log(FunctionRef<void(const NodeLog &)> fn) const;
 
  private:
   using LogByTreeContext = Map<const DTreeContext *, TreeLog *>;

source/blender/nodes/intern/geometry_nodes_eval_log.cc

@@ -99,6 +99,13 @@ SocketLog &ModifierLog::lookup_or_add_socket_log(LogByTreeContext &log_by_tree_c
   return socket_log;
 }
 
+void ModifierLog::foreach_node_log(FunctionRef<void(const NodeLog &)> fn) const
+{
+  if (root_tree_logs_) {
+    root_tree_logs_->foreach_node_log(fn);
+  }
+}
+
 const NodeLog *TreeLog::lookup_node_log(StringRef node_name) const
 {
   const destruct_ptr<NodeLog> *node_log = node_logs_.lookup_ptr_as(node_name);
@@ -122,6 +129,17 @@ const TreeLog *TreeLog::lookup_child_log(StringRef node_name) const
   return tree_log->get();
 }
 
+void TreeLog::foreach_node_log(FunctionRef<void(const NodeLog &)> fn) const
+{
+  for (auto node_log : node_logs_.items()) {
+    fn(*node_log.value);
+  }
+
+  for (auto child : child_logs_.items()) {
+    child.value->foreach_node_log(fn);
+  }
+}
+
 const SocketLog *NodeLog::lookup_socket_log(eNodeSocketInOut in_out, int index) const
 {
   BLI_assert(index >= 0);