Cleanup: decentralize .blend I/O for space types

This adds callbacks to `SpaceType` to make each editor responsible to
manage their own .blend I/O, and moves relevant code from `screen.c`
to the editors files.

Differential Revision: D11069

2 files changed, 55 insertions, 1 deletions

diff --git a/source/blender/editors/space_file/CMakeLists.txt b/source/blender/editors/space_file/CMakeLists.txt
index fb9d5ab9b13..688aa846c30 100644
--- a/source/blender/editors/space_file/CMakeLists.txt
+++ b/source/blender/editors/space_file/CMakeLists.txt
@@ -16,6 +16,9 @@ set(INC
   ../../windowmanager
   ../../../../intern/atomic
   ../../../../intern/guardedalloc
+
+  # dna_type_offsets.h
+  ${CMAKE_CURRENT_BINARY_DIR}/../../makesdna/intern
   # RNA_prototypes.h
   ${CMAKE_BINARY_DIR}/source/blender/makesrna
 )
@@ -89,5 +92,5 @@ endif()
 
 blender_add_lib(bf_editor_space_file "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
 
-# RNA_prototypes.h
+# RNA_prototypes.h dna_type_offsets.h
 add_dependencies(bf_editor_space_file bf_rna)
diff --git a/source/blender/editors/space_file/space_file.c b/source/blender/editors/space_file/space_file.c
index bba0c27bb4d..a3182222263 100644
--- a/source/blender/editors/space_file/space_file.c
+++ b/source/blender/editors/space_file/space_file.c
@@ -41,6 +41,8 @@
 #include "UI_resources.h"
 #include "UI_view2d.h"
 
+#include "BLO_read_write.h"
+
 #include "GPU_framebuffer.h"
 #include "file_indexer.h"
 #include "file_intern.h" /* own include */
@@ -986,6 +988,52 @@ static void file_id_remap(ScrArea *area, SpaceLink *sl, const struct IDRemapper
   file_reset_filelist_showing_main_data(area, sfile);
 }
 
+static void file_blend_read_data(BlendDataReader *reader, SpaceLink *sl)
+{
+  SpaceFile *sfile = (SpaceFile *)sl;
+
+  /* this sort of info is probably irrelevant for reloading...
+   * plus, it isn't saved to files yet!
+   */
+  sfile->folders_prev = sfile->folders_next = NULL;
+  BLI_listbase_clear(&sfile->folder_histories);
+  sfile->files = NULL;
+  sfile->layout = NULL;
+  sfile->op = NULL;
+  sfile->previews_timer = NULL;
+  sfile->tags = 0;
+  sfile->runtime = NULL;
+  BLO_read_data_address(reader, &sfile->params);
+  BLO_read_data_address(reader, &sfile->asset_params);
+  if (sfile->params) {
+    sfile->params->rename_id = NULL;
+  }
+  if (sfile->asset_params) {
+    sfile->asset_params->base_params.rename_id = NULL;
+  }
+}
+
+static void file_blend_read_lib(BlendLibReader *UNUSED(reader),
+                                ID *UNUSED(parent_id),
+                                SpaceLink *sl)
+{
+  SpaceFile *sfile = (SpaceFile *)sl;
+  sfile->tags |= FILE_TAG_REBUILD_MAIN_FILES;
+}
+
+static void file_blend_write(BlendWriter *writer, SpaceLink *sl)
+{
+  SpaceFile *sfile = (SpaceFile *)sl;
+
+  BLO_write_struct(writer, SpaceFile, sl);
+  if (sfile->params) {
+    BLO_write_struct(writer, FileSelectParams, sfile->params);
+  }
+  if (sfile->asset_params) {
+    BLO_write_struct(writer, FileAssetSelectParams, sfile->asset_params);
+  }
+}
+
 void ED_spacetype_file(void)
 {
   SpaceType *st = MEM_callocN(sizeof(SpaceType), "spacetype file");
@@ -1009,6 +1057,9 @@ void ED_spacetype_file(void)
   st->space_subtype_set = file_space_subtype_set;
   st->context = file_context;
   st->id_remap = file_id_remap;
+  st->blend_read_data = file_blend_read_data;
+  st->blend_read_lib = file_blend_read_lib;
+  st->blend_write = file_blend_write;
 
   /* regions: main window */
   art = MEM_callocN(sizeof(ARegionType), "spacetype file region");