Outliner: Synced selection and active element highlighting

Adds a toggle to the filter menu for outliner synced selection. Enabled
by default, this ensures selection is synced between objects, bones, and
sequences. An active outliner element theme color is added to indicate
which element is active.

Synced selection is controlled on the operator level. Each operator
that modifies selection for objects, bones, sequences, or outliner
elements needs to call the respective ED_outliner_select_sync_from..
function to tag outliners to be synced.

Syncing is done lazily on outliner draw.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/editors/space_outliner/outliner_intern.h b/source/blender/editors/space_outliner/outliner_intern.h
index fa28d119244..c12fdcc6d1f 100644
--- a/source/blender/editors/space_outliner/outliner_intern.h
+++ b/source/blender/editors/space_outliner/outliner_intern.h
@@ -253,6 +253,8 @@ void outliner_object_mode_toggle(struct bContext *C,
                                  ViewLayer *view_layer,
                                  Base *base);
 
+void outliner_element_activate(struct SpaceOutliner *soops, struct TreeStoreElem *tselem);
+
 /* outliner_edit.c ---------------------------------------------- */
 typedef void (*outliner_operation_cb)(struct bContext *C,
                                       struct ReportList *,
@@ -457,4 +459,8 @@ bool outliner_tree_traverse(const SpaceOutliner *soops,
                             void *customdata);
 float outliner_restrict_columns_width(const struct SpaceOutliner *soops);
 
+/* outliner_sync.c ---------------------------------------------- */
+
+void outliner_sync_selection(const struct bContext *C, struct SpaceOutliner *soops);
+
 #endif /* __OUTLINER_INTERN_H__ */