Assets: Add an active asset library per workspace, for the UI to use

This per-workspace active asset library will be used by the asset views
later. Note that Asset Browsers have their own active asset library,
overriding the one from the workspace.

As part of this the `FileSelectAssetLibraryUID` type gets replaced by
`AssetLibraryReference` which is on the asset level now, not the
File/Asset Browser level. But some more work is needed to complete that,
which is better done in a separate commit.
This also moves the asset library from/to enum-value logic from RNA to
the editor asset level, which will later be used by the asset view.

1 files changed, 91 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_asset.c b/source/blender/makesrna/intern/rna_asset.c
index 55f680c736d..54cc87b4eea 100644
--- a/source/blender/makesrna/intern/rna_asset.c
+++ b/source/blender/makesrna/intern/rna_asset.c
@@ -35,6 +35,8 @@
 
 #  include "BLI_listbase.h"
 
+#  include "ED_asset.h"
+
 #  include "RNA_access.h"
 
 static AssetTag *rna_AssetMetaData_tag_new(AssetMetaData *asset_data,
@@ -123,6 +125,73 @@ static void rna_AssetMetaData_active_tag_range(
   *max = *softmax = MAX2(asset_data->tot_tags - 1, 0);
 }
 
+int rna_asset_library_reference_get(const AssetLibraryReference *library)
+{
+  return ED_asset_library_reference_to_enum_value(library);
+}
+
+void rna_asset_library_reference_set(AssetLibraryReference *library, int value)
+{
+  *library = ED_asset_library_reference_from_enum_value(value);
+}
+
+const EnumPropertyItem *rna_asset_library_reference_itemf(bContext *UNUSED(C),
+                                                          PointerRNA *UNUSED(ptr),
+                                                          PropertyRNA *UNUSED(prop),
+                                                          bool *r_free)
+{
+  const EnumPropertyItem predefined_items[] = {
+      /* For the future. */
+      // {ASSET_REPO_BUNDLED, "BUNDLED", 0, "Bundled", "Show the default user assets"},
+      {ASSET_LIBRARY_LOCAL,
+       "LOCAL",
+       ICON_BLENDER,
+       "Current File",
+       "Show the assets currently available in this Blender session"},
+      {0, NULL, 0, NULL, NULL},
+  };
+
+  EnumPropertyItem *item = NULL;
+  int totitem = 0;
+
+  /* Add separator if needed. */
+  if (!BLI_listbase_is_empty(&U.asset_libraries)) {
+    const EnumPropertyItem sepr = {0, "", 0, "Custom", NULL};
+    RNA_enum_item_add(&item, &totitem, &sepr);
+  }
+
+  int i = 0;
+  for (bUserAssetLibrary *user_library = U.asset_libraries.first; user_library;
+       user_library = user_library->next, i++) {
+    /* Note that the path itself isn't checked for validity here. If an invalid library path is
+     * used, the Asset Browser can give a nice hint on what's wrong. */
+    const bool is_valid = (user_library->name[0] && user_library->path[0]);
+    if (!is_valid) {
+      continue;
+    }
+
+    /* Use library path as description, it's a nice hint for users. */
+    EnumPropertyItem tmp = {ASSET_LIBRARY_CUSTOM + i,
+                            user_library->name,
+                            ICON_NONE,
+                            user_library->name,
+                            user_library->path};
+    RNA_enum_item_add(&item, &totitem, &tmp);
+  }
+
+  if (totitem) {
+    const EnumPropertyItem sepr = {0, "", 0, "Built-in", NULL};
+    RNA_enum_item_add(&item, &totitem, &sepr);
+  }
+
+  /* Add predefined items. */
+  RNA_enum_items_add(&item, &totitem, predefined_items);
+
+  RNA_enum_item_end(&item, &totitem);
+  *r_free = true;
+  return item;
+}
+
 #else
 
 static void rna_def_asset_tag(BlenderRNA *brna)
@@ -209,12 +278,34 @@ static void rna_def_asset_data(BlenderRNA *brna)
   RNA_def_property_ui_text(prop, "Active Tag", "Index of the tag set for editing");
 }
 
+static void rna_def_asset_library_reference(BlenderRNA *brna)
+{
+  StructRNA *srna = RNA_def_struct(brna, "AssetLibraryReference", NULL);
+  RNA_def_struct_ui_text(
+      srna, "Asset Library Reference", "Identifier to refere to the asset library");
+}
+
+/**
+ * \note the UI text and updating has to be set by the caller.
+ */
+PropertyRNA *rna_def_asset_library_reference_common(struct StructRNA *srna,
+                                                    const char *get,
+                                                    const char *set)
+{
+  PropertyRNA *prop = RNA_def_property(srna, "active_asset_library", PROP_ENUM, PROP_NONE);
+  RNA_def_property_enum_items(prop, DummyRNA_NULL_items);
+  RNA_def_property_enum_funcs(prop, get, set, "rna_asset_library_reference_itemf");
+
+  return prop;
+}
+
 void RNA_def_asset(BlenderRNA *brna)
 {
   RNA_define_animate_sdna(false);
 
   rna_def_asset_tag(brna);
   rna_def_asset_data(brna);
+  rna_def_asset_library_reference(brna);
 
   RNA_define_animate_sdna(true);
 }