Custom Properties: support default values for strings

Differential Revision: https://developer.blender.org/D8102

1 files changed, 34 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_access.c b/source/blender/makesrna/intern/rna_access.c
index cb9679ad925..79cf993e0cc 100644
--- a/source/blender/makesrna/intern/rna_access.c
+++ b/source/blender/makesrna/intern/rna_access.c
@@ -3473,6 +3473,24 @@ void RNA_property_string_get_default(PointerRNA *UNUSED(ptr), PropertyRNA *prop,
 {
   StringPropertyRNA *sprop = (StringPropertyRNA *)rna_ensure_property(prop);
 
+  if (prop->magic != RNA_MAGIC) {
+    /* attempt to get the local ID values */
+    const IDProperty *idp_ui = rna_idproperty_ui(prop);
+
+    if (idp_ui) {
+      IDProperty *item;
+
+      item = IDP_GetPropertyTypeFromGroup(idp_ui, "default", IDP_STRING);
+      if (item) {
+        strcpy(value, IDP_String(item));
+        return;
+      }
+    }
+
+    strcpy(value, "");
+    return;
+  }
+
   BLI_assert(RNA_property_type(prop) == PROP_STRING);
 
   strcpy(value, sprop->defaultvalue);
@@ -3507,6 +3525,22 @@ int RNA_property_string_default_length(PointerRNA *UNUSED(ptr), PropertyRNA *pro
 {
   StringPropertyRNA *sprop = (StringPropertyRNA *)rna_ensure_property(prop);
 
+  if (prop->magic != RNA_MAGIC) {
+    /* attempt to get the local ID values */
+    const IDProperty *idp_ui = rna_idproperty_ui(prop);
+
+    if (idp_ui) {
+      IDProperty *item;
+
+      item = IDP_GetPropertyTypeFromGroup(idp_ui, "default", IDP_STRING);
+      if (item) {
+        return strlen(IDP_String(item));
+      }
+    }
+
+    return 0;
+  }
+
   BLI_assert(RNA_property_type(prop) == PROP_STRING);
 
   return strlen(sprop->defaultvalue);