Refactor: Simplify spreadsheet handling of cell values

Previously we used a `CellValue` class to hold the data for a cell,
and called a function to fill it whenever necessary. This is an
unnecessary complication when we have virtual generic arrays
and most data is already easily accessible that way anyway.
This patch removes `CellValue` and uses `fn::GVArray` to provide
access to data instead.

In the future, if rows have different types within a single column,
we can use a `GVArray` of `blender::Any` to interface with the drawing.

Along with that, the use of virtual arrays made it easy to do a
few other cleanups:
 - Use selection domain interpolations from rB5841f8656d95
   for the mesh selection filter.
 - Change the row filter to only calculate for necessary indices.

Differential Revision: https://developer.blender.org/D13478

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_space_types.h b/source/blender/makesdna/DNA_space_types.h
index 3ae7b3b68b8..a7a19be5b3e 100644
--- a/source/blender/makesdna/DNA_space_types.h
+++ b/source/blender/makesdna/DNA_space_types.h
@@ -2006,6 +2006,7 @@ typedef enum eSpaceSpreadsheet_ContextType {
 } eSpaceSpreadsheet_ContextType;
 
 typedef enum eSpreadsheetColumnValueType {
+  SPREADSHEET_VALUE_TYPE_UNKNOWN = -1,
   SPREADSHEET_VALUE_TYPE_BOOL = 0,
   SPREADSHEET_VALUE_TYPE_INT32 = 1,
   SPREADSHEET_VALUE_TYPE_FLOAT = 2,