From 6034f162575519500a9916acd4ea103c5ad34932 Mon Sep 17 00:00:00 2001
From: "Michael D. Lowis" <mike@mdlowis.com>
Date: Wed, 12 Sep 2018 21:31:07 -0400
Subject: [PATCH] added logic to clear modified status if undo state matches
 the last save

---
 TODO.md    | 1 -
 inc/edit.h | 1 +
 lib/buf.c  | 4 ++++
 3 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/TODO.md b/TODO.md
index 1e50fe7..437e978 100644
--- a/TODO.md
+++ b/TODO.md
@@ -7,7 +7,6 @@ BUGS:
 * no copy indent
 * no magic right click
 * Ctrl+Up,Dn not bound or not working
-* Undo does not clear modified status if state is the same
 * gap buffer does not handle UTF-8 currently
 
 Up Next:
diff --git a/inc/edit.h b/inc/edit.h
index 5a87aa8..60de10f 100644
--- a/inc/edit.h
+++ b/inc/edit.h
@@ -30,6 +30,7 @@ typedef struct {
     char* gapend;     /* end of the gap */
     Log* undo;        /* undo list */
     Log* redo;        /* redo list */
+    Log* save;        /* pointer to last save position */
     int transid;      /* id number of the current transaction */
     Sel selection;    /* the currently selected text */
 } Buf;
diff --git a/lib/buf.c b/lib/buf.c
index 6244533..4ef2da9 100644
--- a/lib/buf.c
+++ b/lib/buf.c
@@ -100,6 +100,8 @@ int buf_save(Buf* buf, char* path) {
     } else {
         buf->status = ERRORED;
     }
+    if (buf->status == NORMAL)
+        buf->save = buf->undo;
     return buf->status;
 }
 
@@ -243,6 +245,8 @@ static void log_swap(Buf* buf, Log** src, Log** dest) {
         log_swap(buf, src, dest);
     else
         dumplog(buf);
+    if (buf->save == buf->undo)
+        buf->status = NORMAL;
 }
 
 void buf_logstart(Buf* buf) {
-- 
2.49.0