File Browser: Manual auto-increase name support for output filepaths

This functionality was present until Blender 2.80.  Basically it adds back the
"+" and "-" buttons in the file browser when it stores an output filepath.

This is useful for someone rendering multiple versions of an animation (or a
composition) to compare.

At the moment this is used for the render output, and the File Output node in
the compositor.

Differential Revision: https://developer.blender.org/D15968

1 files changed, 13 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_rna.c b/source/blender/makesrna/intern/rna_rna.c
index 57f75fe892c..8d5e82cbfa8 100644
--- a/source/blender/makesrna/intern/rna_rna.c
+++ b/source/blender/makesrna/intern/rna_rna.c
@@ -160,6 +160,7 @@ const EnumPropertyItem rna_enum_property_flag_items[] = {
      0,
      "Update on every keystroke in textedit 'mode'",
      ""},
+    {PROP_PATH_OUTPUT, "OUTPUT_PATH", 0, "Output Path", ""},
     {0, NULL, 0, NULL, NULL},
 };
 
@@ -729,6 +730,12 @@ static bool rna_Property_is_library_editable_flag_get(PointerRNA *ptr)
   return (prop->flag & PROP_LIB_EXCEPTION) != 0;
 }
 
+static bool rna_Property_is_path_output_flag_get(PointerRNA *ptr)
+{
+  PropertyRNA *prop = (PropertyRNA *)ptr->data;
+  return (prop->flag & PROP_PATH_OUTPUT) != 0;
+}
+
 static int rna_Property_tags_get(PointerRNA *ptr)
 {
   return RNA_property_tags(ptr->data);
@@ -3023,6 +3030,12 @@ static void rna_def_property(BlenderRNA *brna)
   RNA_def_property_ui_text(
       prop, "Library Editable", "Property is editable from linked instances (changes not saved)");
 
+  prop = RNA_def_property(srna, "is_path_output", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_clear_flag(prop, PROP_EDITABLE);
+  RNA_def_property_boolean_funcs(prop, "rna_Property_is_path_output_flag_get", NULL);
+  RNA_def_property_ui_text(
+      prop, "Path Output", "Property is a filename, filepath or directory output");
+
   prop = RNA_def_property(srna, "tags", PROP_ENUM, PROP_NONE);
   RNA_def_property_clear_flag(prop, PROP_EDITABLE);
   RNA_def_property_enum_items(prop, dummy_prop_tags);