patch 8.0.1763: :argedit does not reuse an empty unnamed buffer
Problem: :argedit does not reuse an empty unnamed buffer.
Solution: Add the BLN_CURBUF flag and fix all the side effects. (Christian
Brabandt, closes #2713)
diff --git a/src/buffer.c b/src/buffer.c
index c3d3d77..dd61833 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1842,6 +1842,20 @@
static int top_file_num = 1; /* highest file number */
/*
+ * Return TRUE if the current buffer is empty, unnamed, unmodified and used in
+ * only one window. That means it can be re-used.
+ */
+ int
+curbuf_reusable(void)
+{
+ return (curbuf != NULL
+ && curbuf->b_ffname == NULL
+ && curbuf->b_nwindows <= 1
+ && (curbuf->b_ml.ml_mfp == NULL || BUFEMPTY())
+ && !curbufIsChanged());
+}
+
+/*
* Add a file name to the buffer list. Return a pointer to the buffer.
* If the same file name already exists return a pointer to that buffer.
* If it does not exist, or if fname == NULL, a new entry is created.
@@ -1921,11 +1935,7 @@
* buffer.)
*/
buf = NULL;
- if ((flags & BLN_CURBUF)
- && curbuf != NULL
- && curbuf->b_ffname == NULL
- && curbuf->b_nwindows <= 1
- && (curbuf->b_ml.ml_mfp == NULL || BUFEMPTY()))
+ if ((flags & BLN_CURBUF) && curbuf_reusable())
{
buf = curbuf;
/* It's like this buffer is deleted. Watch out for autocommands that