From 3215d1ade197b75a8c00fc476d8dcedc9f572004 Mon Sep 17 00:00:00 2001
From: Brendan Cully <brendan@kublai.com>
Date: Wed, 28 Oct 2009 23:03:26 -0700
Subject: [PATCH] Unfold headers to wrap length in pager, when weed is set.

From Rocco's patch queue.
---
 sendlib.c | 63 +++++++++++++++++++++++++++++++++++++++++++++----------
 1 file changed, 52 insertions(+), 11 deletions(-)

diff --git a/sendlib.c b/sendlib.c
index c4f5e469..45e62c02 100644
--- a/sendlib.c
+++ b/sendlib.c
@@ -1721,6 +1721,35 @@ static int fold_one_header (FILE *fp, const char *tag, const char *value,
   return 0;
 }
 
+static char *unfold_header (char *s)
+{
+  char *p = s, *q = s;
+
+  while (p && *p)
+  {
+    /* remove CRLF prior to FWSP, turn \t into ' ' */
+    if (*p == '\r' && *(p + 1) && *(p + 1) == '\n' && *(p + 2) &&
+	(*(p + 2) == ' ' || *(p + 2) == '\t'))
+    {
+      *q++ = ' ';
+      p += 3;
+      continue;
+    }
+    /* remove LF prior to FWSP, turn \t into ' ' */
+    else if (*p == '\n' && *(p + 1) && (*(p + 1) == ' ' || *(p + 1) == '\t'))
+    {
+      *q++ = ' ';
+      p += 2;
+      continue;
+    }
+    *q++ = *p++;
+  }
+  if (q)
+    *q = 0;
+
+  return s;
+}
+
 static int write_one_header (FILE *fp, int pfxw, int max, int wraplen,
 			     const char *pfx, const char *start, const char *end,
 			     int flags)
@@ -1789,8 +1818,12 @@ int mutt_write_one_header (FILE *fp, const char *tag, const char *value,
 			   const char *pfx, int wraplen, int flags)
 {
   char *p = (char *)value, *last, *line;
-  int max = 0, w;
+  int max = 0, w, rc = -1;
   int pfxw = mutt_strwidth (pfx);
+  char *v = safe_strdup (value);
+
+  if (!(flags & CH_DISPLAY) || option (OPTWEED))
+    v = unfold_header (v);
 
   /* when not displaying, use sane wrap value */
   if (!(flags & CH_DISPLAY))
@@ -1807,19 +1840,23 @@ int mutt_write_one_header (FILE *fp, const char *tag, const char *value,
   {
     /* if header is short enough, simply print it */
     if (!(flags & CH_DISPLAY) && mutt_strwidth (tag) + 2 + pfxw +
-	mutt_strwidth (value) <= wraplen)
+	mutt_strwidth (v) <= wraplen)
     {
       dprint(4,(debugfile,"mwoh: buf[%s%s: %s] is short enough\n",
-		NONULL(pfx), tag, value));
-      if (fprintf (fp, "%s%s: %s\n", NONULL(pfx), tag, value) <= 0)
-	return -1;
-      return 0;
+		NONULL(pfx), tag, v));
+      if (fprintf (fp, "%s%s: %s\n", NONULL(pfx), tag, v) <= 0)
+	goto out;
+      rc = 0;
+      goto out;
     }
     else
-      return fold_one_header (fp, tag, value, pfx, wraplen, flags);
+    {
+      rc = fold_one_header (fp, tag, v, pfx, wraplen, flags);
+      goto out;
+    }
   }
 
-  p = last = line = (char *)value;
+  p = last = line = (char *)v;
   while (p && *p)
   {
     p = strchr (p, '\n');
@@ -1839,7 +1876,7 @@ int mutt_write_one_header (FILE *fp, const char *tag, const char *value,
     if (*p != ' ' && *p != '\t')
     {
       if (write_one_header (fp, pfxw, max, wraplen, pfx, last, p, flags) < 0)
-	return -1;
+	goto out;
       last = p;
       max = 0;
     }
@@ -1847,9 +1884,13 @@ int mutt_write_one_header (FILE *fp, const char *tag, const char *value,
 
   if (last && *last)
     if (write_one_header (fp, pfxw, max, wraplen, pfx, last, p, flags) < 0)
-      return -1;
+      goto out;
 
-  return 0;
+  rc = 0;
+
+out:
+  FREE (&v);
+  return rc;
 }
 
 
-- 
2.40.0