From fb0c46594a3e16a3a5ea06c0b21c487b8faab0e9 Mon Sep 17 00:00:00 2001
From: Michael Elkins <me@sigpipe.org>
Date: Wed, 29 Sep 2010 10:26:07 -0700
Subject: [PATCH] fix handling of format=flowed when $wrap is 0.

---
 rfc3676.c | 26 +++++++++++++++++++++-----
 1 file changed, 21 insertions(+), 5 deletions(-)

diff --git a/rfc3676.c b/rfc3676.c
index aadda0f3..3dd7c742 100644
--- a/rfc3676.c
+++ b/rfc3676.c
@@ -96,13 +96,29 @@ static void flush_par (STATE *s, flowed_state_t *fst)
   fst->spaces = 0;
 }
 
+/* Calculate the paragraph width based upon the current quote level. The start
+ * of a quoted line will be ">>> ", so we need to subtrace the space required
+ * for the prefix from the terminal width. */
 static int quote_width (STATE *s, int ql)
 {
-  size_t width = (Wrap ? mutt_term_width (Wrap) : FLOWED_MAX) - 1;
-  if (s->flags & M_REPLYING && width > FLOWED_MAX)
-    width = FLOWED_MAX;
-  if (ql + 1 < width)
-    width -= ql + 1;
+  int width = mutt_term_width (Wrap);
+  if (option(OPTTEXTFLOWED) && (s->flags & M_REPLYING))
+  {
+    /* When replying, force a wrap at FLOWED_MAX to comply with RFC3676
+     * guidelines */
+    if (width > FLOWED_MAX)
+      width = FLOWED_MAX;
+    ++ql; /* When replying, we will add an additional quote level */
+  }
+  /* adjust the paragraph width subtracting the number of prefix chars */
+  width -= ql;
+  /* When displaying (not replying), there will be a space between the prefix
+   * string and the paragraph */
+  if ((s->flags & M_REPLYING) == 0 && ql > 0)
+    --width;
+  /* failsafe for really long quotes */
+  if (width <= 0)
+    width = FLOWED_MAX; /* arbitrary, since the line will wrap */
   return width;
 }
 
-- 
2.40.0