Assets: Replace duplicated asset library reference type from DNA

Since recently it's possible to access assets from outside the
File/Asset Browser, via the asset view template. So we are slowly
moving away from file space specific code to dedicated asset system
code. I introduced `AssetLibraryReference` as a duplicate of
`FileSelectAssetLibraryUID`, with a plan to delete the latter in a
separate cleanup commit. That's exactly what this commit is.

This will cause Asset Browsers to open with the default "Current File"
Asset Library. We could avoid that, but it's a minor issue really.

source/blender/blenloader/intern/versioning_300.c

@@ -580,5 +580,22 @@ void blo_do_versions_300(FileData *fd, Library *UNUSED(lib), Main *bmain)
         BKE_asset_library_reference_init_default(&workspace->asset_library);
       }
     }
+
+    if (!DNA_struct_elem_find(
+            fd->filesdna, "FileAssetSelectParams", "AssetLibraryReference", "asset_library")) {
+      LISTBASE_FOREACH (bScreen *, screen, &bmain->screens) {
+        LISTBASE_FOREACH (ScrArea *, area, &screen->areabase) {
+          LISTBASE_FOREACH (SpaceLink *, space, &area->spacedata) {
+            if (space->spacetype == SPACE_FILE) {
+              SpaceFile *sfile = (SpaceFile *)space;
+              if (sfile->browse_mode != FILE_BROWSE_MODE_ASSETS) {
+                continue;
+              }
+              BKE_asset_library_reference_init_default(&sfile->asset_params->asset_library);
+            }
+          }
+        }
+      }
+    }
   }
 }

source/blender/editors/asset/asset_list.cc

@@ -143,11 +143,6 @@ void AssetList::setup(const AssetFilterSettings *filter_settings)
 {
   FileList *files = filelist_;
 
-  /* TODO there should only be one (FileSelectAssetLibraryUID vs. AssetLibraryReference). */
-  FileSelectAssetLibraryUID file_asset_lib_ref;
-  file_asset_lib_ref.type = library_ref_.type;
-  file_asset_lib_ref.custom_library_index = library_ref_.custom_library_index;
-
   bUserAssetLibrary *user_library = nullptr;
 
   /* Ensure valid repository, or fall-back to local one. */
@@ -162,7 +157,7 @@ void AssetList::setup(const AssetFilterSettings *filter_settings)
   /* TODO pass options properly. */
   filelist_setrecursion(files, 1);
   filelist_setsorting(files, FILE_SORT_ALPHA, false);
-  filelist_setlibrary(files, &file_asset_lib_ref);
+  filelist_setlibrary(files, &library_ref_);
   /* TODO different filtering settings require the list to be reread. That's a no-go for when we
    * want to allow showing the same asset library with different filter settings (as in,
    * different ID types). The filelist needs to be made smarter somehow, maybe goes together with

source/blender/editors/space_file/filelist.c

@@ -382,7 +382,7 @@ typedef struct FileList {
 
   eFileSelectType type;
   /* The library this list was created for. Stored here so we know when to re-read. */
-  FileSelectAssetLibraryUID *asset_library;
+  AssetLibraryReference *asset_library;
 
   short flags;
 
@@ -1045,8 +1045,8 @@ void filelist_setfilter_options(FileList *filelist,
  * Checks two libraries for equality.
  * \return True if the libraries match.
  */
-static bool filelist_compare_asset_libraries(const FileSelectAssetLibraryUID *library_a,
-                                             const FileSelectAssetLibraryUID *library_b)
+static bool filelist_compare_asset_libraries(const AssetLibraryReference *library_a,
+                                             const AssetLibraryReference *library_b)
 {
   if (library_a->type != library_b->type) {
     return false;
@@ -1065,7 +1065,7 @@ static bool filelist_compare_asset_libraries(const FileSelectAssetLibraryUID *li
 /**
  * \param asset_library: May be NULL to unset the library.
  */
-void filelist_setlibrary(FileList *filelist, const FileSelectAssetLibraryUID *asset_library)
+void filelist_setlibrary(FileList *filelist, const AssetLibraryReference *asset_library)
 {
   /* Unset if needed. */
   if (!asset_library) {

source/blender/editors/space_file/filelist.h

@@ -29,7 +29,7 @@ extern "C" {
 
 struct BlendHandle;
 struct FileList;
-struct FileSelectAssetLibraryUID;
+struct AssetLibraryReference;
 struct FileSelection;
 struct wmWindowManager;
 
@@ -73,7 +73,7 @@ void filelist_setfilter_options(struct FileList *filelist,
                                 const char *filter_search);
 void filelist_filter(struct FileList *filelist);
 void filelist_setlibrary(struct FileList *filelist,
-                         const struct FileSelectAssetLibraryUID *asset_library);
+                         const struct AssetLibraryReference *asset_library);
 
 void filelist_init_icons(void);
 void filelist_free_icons(void);

source/blender/editors/space_file/filesel.c

@@ -415,7 +415,7 @@ FileAssetSelectParams *ED_fileselect_get_asset_params(const SpaceFile *sfile)
 
 static void fileselect_refresh_asset_params(FileAssetSelectParams *asset_params)
 {
-  FileSelectAssetLibraryUID *library = &asset_params->asset_library;
+  AssetLibraryReference *library = &asset_params->asset_library;
   FileSelectParams *base_params = &asset_params->base_params;
   bUserAssetLibrary *user_library = NULL;
 

source/blender/editors/space_file/space_file.c

@@ -910,13 +910,6 @@ static int /*eContextResult*/ file_context(const bContext *C,
       return CTX_RESULT_NO_DATA;
     }
 
-    BLI_STATIC_ASSERT(offsetof(FileSelectAssetLibraryUID, type) ==
-                          offsetof(AssetLibraryReference, type),
-                      "Expected FileSelectAssetLibraryUID to match AssetLibraryReference");
-    BLI_STATIC_ASSERT(offsetof(FileSelectAssetLibraryUID, custom_library_index) ==
-                          offsetof(AssetLibraryReference, custom_library_index),
-                      "Expected FileSelectAssetLibraryUID to match AssetLibraryReference");
-
     CTX_data_pointer_set(
         result, &screen->id, &RNA_AssetLibraryReference, &asset_params->asset_library);
     return CTX_RESULT_OK;

source/blender/makesdna/DNA_asset_types.h

@@ -89,7 +89,6 @@ typedef enum eAssetLibraryType {
   ASSET_LIBRARY_CUSTOM = 100,
 } eAssetLibraryType;
 
-/* TODO copy of FileSelectAssetLibraryUID */
 /**
  * Information to identify a asset library. May be either one of the predefined types (current
  * 'Main', builtin library, project library), or a custom type as defined in the Preferences.

source/blender/makesdna/DNA_space_types.h

@@ -24,6 +24,7 @@
 
 #pragma once
 
+#include "DNA_asset_types.h"
 #include "DNA_color_types.h" /* for Histogram */
 #include "DNA_defs.h"
 #include "DNA_image_types.h" /* ImageUser */
@@ -696,24 +697,6 @@ typedef enum eSpaceSeq_OverlayType {
 /** \name File Selector
  * \{ */
 
-/**
- * Information to identify a asset library. May be either one of the predefined types (current
- * 'Main', builtin library, project library), or a custom type as defined in the Preferences.
- *
- * If the type is set to #ASSET_LIBRARY_CUSTOM, idname must have the name to identify the
- * custom library. Otherwise idname is not used.
- */
-typedef struct FileSelectAssetLibraryUID {
-  short type; /* eFileAssetLibrary_Type */
-  char _pad[2];
-  /**
-   * If showing a custom asset library (#ASSET_LIBRARY_CUSTOM), this is the index of the
-   * #bUserAssetLibrary within #UserDef.asset_libraries.
-   * Should be ignored otherwise (but better set to -1 then, for sanity and debugging).
-   */
-  int custom_library_index;
-} FileSelectAssetLibraryUID;
-
 /* Config and Input for File Selector */
 typedef struct FileSelectParams {
   /** Title, also used for the text of the execute button. */
@@ -785,7 +768,7 @@ typedef struct FileSelectParams {
 typedef struct FileAssetSelectParams {
   FileSelectParams base_params;
 
-  FileSelectAssetLibraryUID asset_library;
+  AssetLibraryReference asset_library;
 
   short import_type; /* eFileAssetImportType */
   char _pad[6];