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, 16 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_windowmanager_types.h b/source/blender/makesdna/DNA_windowmanager_types.h
index 8dcae41aaa2..cacc79608ad 100644
--- a/source/blender/makesdna/DNA_windowmanager_types.h
+++ b/source/blender/makesdna/DNA_windowmanager_types.h
@@ -131,12 +131,15 @@ typedef struct wmWindowManager {
   ListBase windows;
 
   /** Set on file read. */
-  int initialized;
+  short initialized;
   /** Indicator whether data was saved. */
   short file_saved;
   /** Operator stack depth to avoid nested undo pushes. */
   short op_undo_depth;
 
+  /** Set after selection to notify outliner to sync. Stores type of selection */
+  short outliner_sync_select_dirty;
+
   /** Operator registry. */
   ListBase operators;
 
@@ -186,6 +189,18 @@ enum {
   WM_KEYCONFIG_IS_INITIALIZED = (1 << 1),
 };
 
+/* wmWindowManager.outliner_sync_select_dirty */
+enum {
+  WM_OUTLINER_SYNC_SELECT_FROM_OBJECT = (1 << 0),
+  WM_OUTLINER_SYNC_SELECT_FROM_EDIT_BONE = (1 << 1),
+  WM_OUTLINER_SYNC_SELECT_FROM_POSE_BONE = (1 << 2),
+  WM_OUTLINER_SYNC_SELECT_FROM_SEQUENCE = (1 << 3),
+};
+
+#define WM_OUTLINER_SYNC_SELECT_FROM_ALL \
+  (WM_OUTLINER_SYNC_SELECT_FROM_OBJECT | WM_OUTLINER_SYNC_SELECT_FROM_EDIT_BONE | \
+   WM_OUTLINER_SYNC_SELECT_FROM_POSE_BONE | WM_OUTLINER_SYNC_SELECT_FROM_SEQUENCE)
+
 #define WM_KEYCONFIG_STR_DEFAULT "blender"
 
 /* IME is win32 only! */