bmesh py api

* add BLI_rfindlink for reverse index lookup (used so bm.select_history[-1] doesn't have to loop the entire list twice).
* add bm.select_history.active so you can get the last selected item or None without having to check seq length.

2 files changed, 17 insertions, 1 deletions

diff --git a/source/blender/blenlib/BLI_listbase.h b/source/blender/blenlib/BLI_listbase.h
index b0a5e80d850..abe7eacb1ac 100644
--- a/source/blender/blenlib/BLI_listbase.h
+++ b/source/blender/blenlib/BLI_listbase.h
@@ -41,15 +41,16 @@ extern "C" {
 #endif
 
 void BLI_insertlink(struct ListBase *listbase, void *vprevlink, void *vnewlink);
-void *BLI_findlink(const struct ListBase *listbase, int number);
 int BLI_findindex(const struct ListBase *listbase, void *vlink);
 int BLI_findstringindex(const struct ListBase *listbase, const char *id, const int offset);
 
 /* find forwards */
+void *BLI_findlink(const struct ListBase *listbase, int number);
 void *BLI_findstring(const struct ListBase *listbase, const char *id, const int offset);
 void *BLI_findstring_ptr(const struct ListBase *listbase, const char *id, const int offset);
 
 /* find backwards */
+void *BLI_rfindlink(const struct ListBase *listbase, int number);
 void *BLI_rfindstring(const struct ListBase *listbase, const char *id, const int offset);
 void *BLI_rfindstring_ptr(const struct ListBase *listbase, const char *id, const int offset);
 
diff --git a/source/blender/blenlib/intern/listbase.c b/source/blender/blenlib/intern/listbase.c
index 52fd857d6e4..6155bf83a57 100644
--- a/source/blender/blenlib/intern/listbase.c
+++ b/source/blender/blenlib/intern/listbase.c
@@ -338,6 +338,21 @@ void *BLI_findlink(const ListBase *listbase, int number)
 	return link;
 }
 
+void *BLI_rfindlink(const ListBase *listbase, int number)
+{
+	Link *link = NULL;
+
+	if (number >= 0) {
+		link = listbase->last;
+		while (link != NULL && number != 0) {
+			number--;
+			link = link->prev;
+		}
+	}
+
+	return link;
+}
+
 int BLI_findindex(const ListBase *listbase, void *vlink)
 {
 	Link *link= NULL;