Fix: string attributes not shown properly in spreadsheet

Pull Request: https://projects.blender.org/blender/blender/pulls/127892

source/blender/editors/space_spreadsheet/spreadsheet_column.cc

@@ -2,6 +2,7 @@
  *
  * SPDX-License-Identifier: GPL-2.0-or-later */
 
+#include "DNA_meshdata_types.h"
 #include "DNA_space_types.h"
 
 #include "MEM_guardedalloc.h"
@@ -48,7 +49,7 @@ eSpreadsheetColumnValueType cpp_type_to_column_type(const CPPType &type)
   if (type.is<ColorGeometry4f>()) {
     return SPREADSHEET_VALUE_TYPE_COLOR;
   }
-  if (type.is<std::string>()) {
+  if (type.is<std::string>() || type.is<MStringProperty>()) {
     return SPREADSHEET_VALUE_TYPE_STRING;
   }
   if (type.is<bke::InstanceReference>()) {

source/blender/editors/space_spreadsheet/spreadsheet_layout.cc

@@ -19,6 +19,7 @@
 #include "spreadsheet_layout.hh"
 
 #include "DNA_collection_types.h"
+#include "DNA_meshdata_types.h"
 #include "DNA_object_types.h"
 #include "DNA_userdef_types.h"
 
@@ -249,6 +250,32 @@ class SpreadsheetLayoutDrawer : public SpreadsheetDrawer {
                        0,
                        nullptr);
     }
+    else if (data.type().is<MStringProperty>()) {
+      MStringProperty *prop = MEM_cnew<MStringProperty>(__func__);
+      data.get_to_uninitialized(real_index, prop);
+      uiBut *but = uiDefIconTextBut(params.block,
+                                    UI_BTYPE_LABEL,
+                                    0,
+                                    ICON_NONE,
+                                    StringRef(prop->s, prop->s_len),
+                                    params.xmin,
+                                    params.ymin,
+                                    params.width,
+                                    params.height,
+                                    nullptr,
+                                    0,
+                                    0,
+                                    nullptr);
+
+      UI_but_func_tooltip_set(
+          but,
+          [](bContext * /*C*/, void *argN, const char * /*tip*/) {
+            const MStringProperty &prop = *static_cast<MStringProperty *>(argN);
+            return std::string(StringRef(prop.s, prop.s_len));
+          },
+          prop,
+          MEM_freeN);
+    }
   }
 
   void draw_float_vector(const CellDrawParams &params, const Span<float> values) const