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, 46 insertions, 1 deletions

diff --git a/source/blender/editors/space_graph/CMakeLists.txt b/source/blender/editors/space_graph/CMakeLists.txt
index 39878debc39..f67434b0f6d 100644
--- a/source/blender/editors/space_graph/CMakeLists.txt
+++ b/source/blender/editors/space_graph/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
 )
@@ -50,5 +54,5 @@ endif()
 
 blender_add_lib(bf_editor_space_graph "${SRC}" "${INC}" "${INC_SYS}" "${LIB}")
 
-# RNA_prototypes.h
+# RNA_prototypes.h dna_type_offsets.h
 add_dependencies(bf_editor_space_graph bf_rna)
diff --git a/source/blender/editors/space_graph/space_graph.c b/source/blender/editors/space_graph/space_graph.c
index 75c1e958e32..fa2029db835 100644
--- a/source/blender/editors/space_graph/space_graph.c
+++ b/source/blender/editors/space_graph/space_graph.c
@@ -45,6 +45,8 @@
 #include "UI_resources.h"
 #include "UI_view2d.h"
 
+#include "BLO_read_write.h"
+
 #include "graph_intern.h" /* own include */
 
 /* ******************** default callbacks for ipo space ***************** */
@@ -804,6 +806,42 @@ static void graph_space_subtype_item_extend(bContext *UNUSED(C),
   RNA_enum_items_add(item, totitem, rna_enum_space_graph_mode_items);
 }
 
+static void graph_blend_read_data(BlendDataReader *reader, SpaceLink *sl)
+{
+  SpaceGraph *sipo = (SpaceGraph *)sl;
+
+  BLO_read_data_address(reader, &sipo->ads);
+  memset(&sipo->runtime, 0x0, sizeof(sipo->runtime));
+}
+
+static void graph_blend_read_lib(BlendLibReader *reader, ID *parent_id, SpaceLink *sl)
+{
+  SpaceGraph *sipo = (SpaceGraph *)sl;
+  bDopeSheet *ads = sipo->ads;
+
+  if (ads) {
+    BLO_read_id_address(reader, parent_id->lib, &ads->source);
+    BLO_read_id_address(reader, parent_id->lib, &ads->filter_grp);
+  }
+}
+
+static void graph_blend_write(BlendWriter *writer, SpaceLink *sl)
+{
+  SpaceGraph *sipo = (SpaceGraph *)sl;
+  ListBase tmpGhosts = sipo->runtime.ghost_curves;
+
+  /* temporarily disable ghost curves when saving */
+  BLI_listbase_clear(&sipo->runtime.ghost_curves);
+
+  BLO_write_struct(writer, SpaceGraph, sl);
+  if (sipo->ads) {
+    BLO_write_struct(writer, bDopeSheet, sipo->ads);
+  }
+
+  /* reenable ghost curves */
+  sipo->runtime.ghost_curves = tmpGhosts;
+}
+
 void ED_spacetype_ipo(void)
 {
   SpaceType *st = MEM_callocN(sizeof(SpaceType), "spacetype ipo");
@@ -824,6 +862,9 @@ void ED_spacetype_ipo(void)
   st->space_subtype_item_extend = graph_space_subtype_item_extend;
   st->space_subtype_get = graph_space_subtype_get;
   st->space_subtype_set = graph_space_subtype_set;
+  st->blend_read_data = graph_blend_read_data;
+  st->blend_read_lib = graph_blend_read_lib;
+  st->blend_write = graph_blend_write;
 
   /* regions: main window */
   art = MEM_callocN(sizeof(ARegionType), "spacetype graphedit region");