Outliner: modernize Purge operator.

That guy was still from the era where only way to remove an ID was to
save & reload the .blend file. Use modern code instead, should also be
much, much more efficient in big production files.

And that’s another nice occasion to add/test new batch ID deletion code, too. ;)

Related to T61276 Make Single User unlinks original object.

1 files changed, 29 insertions, 9 deletions

diff --git a/source/blender/editors/space_outliner/outliner_edit.c b/source/blender/editors/space_outliner/outliner_edit.c
index 274897c0a13..2f765fd0c66 100644
--- a/source/blender/editors/space_outliner/outliner_edit.c
+++ b/source/blender/editors/space_outliner/outliner_edit.c
@@ -1856,16 +1856,37 @@ static int outliner_orphans_purge_invoke(bContext *C, wmOperator *op, const wmEv
 	                                   "Click here to proceed...");
 }
 
+static bool outliner_orphans_purge_tag_cb(Main *UNUSED(bmain), ID *id, void *UNUSED(user_data))
+{
+	if (id->us == 0) {
+		id->tag |= LIB_TAG_DOIT;
+	}
+	else {
+		id->tag &= ~LIB_TAG_DOIT;
+	}
+	return true;
+}
+
 static int outliner_orphans_purge_exec(bContext *C, wmOperator *UNUSED(op))
 {
-	/* Firstly, ensure that the file has been saved,
-	 * so that the latest changes since the last save
-	 * are retained...
-	 */
-	WM_operator_name_call(C, "WM_OT_save_mainfile", WM_OP_EXEC_DEFAULT, NULL);
+	Main *bmain = CTX_data_main(C);
+	SpaceOops *soops = CTX_wm_space_outliner(C);
+
+	/* Tag all IDs having zero users. */
+	BKE_main_foreach_id(bmain, false, outliner_orphans_purge_tag_cb, NULL);
 
-	/* Now, reload the file to get rid of the orphans... */
-	WM_operator_name_call(C, "WM_OT_revert_mainfile", WM_OP_EXEC_DEFAULT, NULL);
+	BKE_id_multi_tagged_delete(bmain);
+
+	/* XXX: tree management normally happens from draw_outliner(), but when
+	 *      you're clicking to fast on Delete object from context menu in
+	 *      outliner several mouse events can be handled in one cycle without
+	 *      handling notifiers/redraw which leads to deleting the same object twice.
+	 *      cleanup tree here to prevent such cases. */
+	outliner_cleanup_tree(soops);
+
+	DEG_relations_tag_update(bmain);
+	WM_event_add_notifier(C, NC_ID | NA_EDITED, NULL);
+	WM_event_add_notifier(C, NC_SPACE | ND_SPACE_OUTLINER, NULL);
 	return OPERATOR_FINISHED;
 }
 
@@ -1874,8 +1895,7 @@ void OUTLINER_OT_orphans_purge(wmOperatorType *ot)
 	/* identifiers */
 	ot->idname = "OUTLINER_OT_orphans_purge";
 	ot->name = "Purge All";
-	ot->description = "Clear all orphaned data-blocks without any users from the file "
-	                  "(cannot be undone, saves to current .blend file)";
+	ot->description = "Clear all orphaned data-blocks without any users from the file.";
 
 	/* callbacks */
 	ot->invoke = outliner_orphans_purge_invoke;