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, 34 insertions, 1 deletions

diff --git a/source/blender/editors/space_action/CMakeLists.txt b/source/blender/editors/space_action/CMakeLists.txt
index b9e27c4de49..3ec814ada48 100644
--- a/source/blender/editors/space_action/CMakeLists.txt
+++ b/source/blender/editors/space_action/CMakeLists.txt
@@ -4,6 +4,7 @@ set(INC
   ../include
   ../../blenkernel
   ../../blenlib
+  ../../blenloader
   ../../blentranslation
   ../../depsgraph
   ../../gpu
@@ -11,6 +12,9 @@ set(INC
   ../../makesrna
   ../../windowmanager
   ../../../../intern/guardedalloc
+
+  # dna_type_offsets.h
+  ${CMAKE_CURRENT_BINARY_DIR}/../../makesdna/intern
   # RNA_prototypes.h
   ${CMAKE_BINARY_DIR}/source/blender/makesrna
 )
@@ -35,5 +39,5 @@ set(LIB
 
 blender_add_lib(bf_editor_space_action "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
 
-# RNA_prototypes.h
+# RNA_prototypes.h dna_type_offsets.h
 add_dependencies(bf_editor_space_action bf_rna)
diff --git a/source/blender/editors/space_action/space_action.c b/source/blender/editors/space_action/space_action.c
index b54750accb0..2f22121f7de 100644
--- a/source/blender/editors/space_action/space_action.c
+++ b/source/blender/editors/space_action/space_action.c
@@ -42,6 +42,8 @@
 #include "ED_space_api.h"
 #include "ED_time_scrub_ui.h"
 
+#include "BLO_read_write.h"
+
 #include "action_intern.h" /* own include */
 
 /* ******************** default callbacks for action space ***************** */
@@ -834,6 +836,30 @@ static void action_space_subtype_item_extend(bContext *UNUSED(C),
   RNA_enum_items_add(item, totitem, rna_enum_space_action_mode_items);
 }
 
+static void action_blend_read_data(BlendDataReader *UNUSED(reader), SpaceLink *sl)
+{
+  SpaceAction *saction = (SpaceAction *)sl;
+  memset(&saction->runtime, 0x0, sizeof(saction->runtime));
+}
+
+static void action_blend_read_lib(BlendLibReader *reader, ID *parent_id, SpaceLink *sl)
+{
+  SpaceAction *saction = (SpaceAction *)sl;
+  bDopeSheet *ads = &saction->ads;
+
+  if (ads) {
+    BLO_read_id_address(reader, parent_id->lib, &ads->source);
+    BLO_read_id_address(reader, parent_id->lib, &ads->filter_grp);
+  }
+
+  BLO_read_id_address(reader, parent_id->lib, &saction->action);
+}
+
+static void action_blend_write(BlendWriter *writer, SpaceLink *sl)
+{
+  BLO_write_struct(writer, SpaceAction, sl);
+}
+
 void ED_spacetype_action(void)
 {
   SpaceType *st = MEM_callocN(sizeof(SpaceType), "spacetype action");
@@ -854,6 +880,9 @@ void ED_spacetype_action(void)
   st->space_subtype_item_extend = action_space_subtype_item_extend;
   st->space_subtype_get = action_space_subtype_get;
   st->space_subtype_set = action_space_subtype_set;
+  st->blend_read_data = action_blend_read_data;
+  st->blend_read_lib = action_blend_read_lib;
+  st->blend_write = action_blend_write;
 
   /* regions: main window */
   art = MEM_callocN(sizeof(ARegionType), "spacetype action region");