View 3D: move picking arguments into a struct & minor refactor

- Add SelectPick_Params struct to make picking logic more
  straightforward and easier to extend.

- Use `eSelectOp` instead of booleans (extend, deselect, toggle)
  which were used to represent 4 states (which wasn't obvious).

- Handle deselect_all when pocking instead of view3d_select_exec,
  de-duplicate de-selection which was already needed in when replacing
  the selection in picking functions.

- Handle outliner update & notifiers in the picking functions
  instead of view3d_select_exec.

- Fix particle select deselect_all option which did nothing.

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/editors/util/select_utils.c b/source/blender/editors/util/select_utils.c
index b6893c3032a..380c7ed0e43 100644
--- a/source/blender/editors/util/select_utils.c
+++ b/source/blender/editors/util/select_utils.c
@@ -112,3 +112,17 @@ bool ED_select_similar_compare_float_tree(const KDTree_1d *tree,
 
   return false;
 }
+
+eSelectOp ED_select_op_from_booleans(const bool extend, const bool deselect, const bool toggle)
+{
+  if (extend) {
+    return SEL_OP_ADD;
+  }
+  if (deselect) {
+    return SEL_OP_SUB;
+  }
+  if (toggle) {
+    return SEL_OP_XOR;
+  }
+  return SEL_OP_SET;
+}