Commit: 3d16a268ee688da25f72a1adb08fdaab454c344d
Author: Campbell Barton
Date: Fri Feb 8 10:15:11 2019 +1100
Branches: master
https://developer.blender.org/rB3d16a268ee688da25f72a1adb08fdaab454c344d
Undo System: basic support in background mode
Some developers were using undo for their scripts, this allows for undo
pushes in background mode, however - as with 2.7x, undo isn't
initialized at startup in background mode.
See replies to T60934
===================================================================
M source/blender/editors/undo/ed_undo.c
===================================================================
diff --git a/source/blender/editors/undo/ed_undo.c
b/source/blender/editors/undo/ed_undo.c
index ffe752e11b1..c1ab4edb8e8 100644
--- a/source/blender/editors/undo/ed_undo.c
+++ b/source/blender/editors/undo/ed_undo.c
@@ -323,6 +323,15 @@ static int ed_undo_exec(bContext *C, wmOperator *op)
static int ed_undo_push_exec(bContext *C, wmOperator *op)
{
+ if (G.background) {
+ /* Exception for background mode, see: T60934.
+ * Note: since the undo stack isn't initialized on startup,
background mode behavior
+ * won't match regular usage, this is just for scripts to do
explicit undo pushes. */
+ wmWindowManager *wm = CTX_wm_manager(C);
+ if (wm->undo_stack == NULL) {
+ wm->undo_stack = BKE_undosys_stack_create();
+ }
+ }
char str[BKE_UNDO_STR_MAX];
RNA_string_get(op->ptr, "message", str);
ED_undo_push(C, str);
@@ -357,7 +366,7 @@ static bool ed_undo_is_init_poll(bContext *C)
{
wmWindowManager *wm = CTX_wm_manager(C);
if (wm->undo_stack == NULL) {
- CTX_wm_operator_poll_msg_set(C, "Undo disabled in background
mode or at startup");
+ CTX_wm_operator_poll_msg_set(C, "Undo disabled at startup");
return false;
}
return true;
@@ -399,7 +408,8 @@ void ED_OT_undo_push(wmOperatorType *ot)
/* api callbacks */
ot->exec = ed_undo_push_exec;
- ot->poll = ed_undo_is_init_poll;
+ /* Unlike others undo operators this initializes undo stack. */
+ ot->poll = ED_operator_screenactive;
ot->flag = OPTYPE_INTERNAL;
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