From 54fb43813443554c685306b92166218c53cdb18f Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Wed, 12 Nov 2014 19:28:16 +0100
Subject: updated for version 7.4.515 Problem:    In a help buffer the global
 'foldmethod' is used.  (Paul Marshall) Solution:   Reset 'foldmethod' when
 starting to edit a help file.  Move the             code to a separate
 function.

---
 src/ex_cmds.c | 130 +++++++++++++++++++++++++++++++---------------------------
 1 file changed, 70 insertions(+), 60 deletions(-)

(limited to 'src/ex_cmds.c')

diff --git a/src/ex_cmds.c b/src/ex_cmds.c
index b8076fc37b..1114f85345 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -34,6 +34,7 @@ static int
     _RTLENTRYF
 #endif
 	help_compare __ARGS((const void *s1, const void *s2));
+static void prepare_help_buffer __ARGS((void));
 
 /*
  * ":ascii" and "ga".
@@ -3531,71 +3532,15 @@ do_ecmd(fnum, ffname, sfname, eap, newlnum, flags, oldwin)
 	oldbuf = (flags & ECMD_OLDBUF);
     }
 
-    if ((flags & ECMD_SET_HELP) || keep_help_flag)
-    {
-	char_u	*p;
-
-	curbuf->b_help = TRUE;
-#ifdef FEAT_QUICKFIX
-	set_string_option_direct((char_u *)"buftype", -1,
-				     (char_u *)"help", OPT_FREE|OPT_LOCAL, 0);
-#endif
-
-	/*
-	 * Always set these options after jumping to a help tag, because the
-	 * user may have an autocommand that gets in the way.
-	 * Accept all ASCII chars for keywords, except ' ', '*', '"', '|', and
-	 * latin1 word characters (for translated help files).
-	 * Only set it when needed, buf_init_chartab() is some work.
-	 */
-	p =
-#ifdef EBCDIC
-		(char_u *)"65-255,^*,^|,^\"";
-#else
-		(char_u *)"!-~,^*,^|,^\",192-255";
-#endif
-	if (STRCMP(curbuf->b_p_isk, p) != 0)
-	{
-	    set_string_option_direct((char_u *)"isk", -1, p,
-						       OPT_FREE|OPT_LOCAL, 0);
-	    check_buf_options(curbuf);
-	    (void)buf_init_chartab(curbuf, FALSE);
-	}
-
-	curbuf->b_p_ts = 8;		/* 'tabstop' is 8 */
-	curwin->w_p_list = FALSE;	/* no list mode */
-
-	curbuf->b_p_ma = FALSE;		/* not modifiable */
-	curbuf->b_p_bin = FALSE;	/* reset 'bin' before reading file */
-	curwin->w_p_nu = 0;		/* no line numbers */
-	curwin->w_p_rnu = 0;		/* no relative line numbers */
-	RESET_BINDING(curwin);		/* no scroll or cursor binding */
-#ifdef FEAT_ARABIC
-	curwin->w_p_arab = FALSE;	/* no arabic mode */
-#endif
-#ifdef FEAT_RIGHTLEFT
-	curwin->w_p_rl  = FALSE;	/* help window is left-to-right */
-#endif
-#ifdef FEAT_FOLDING
-	curwin->w_p_fen = FALSE;	/* No folding in the help window */
-#endif
-#ifdef FEAT_DIFF
-	curwin->w_p_diff = FALSE;	/* No 'diff' */
-#endif
-#ifdef FEAT_SPELL
-	curwin->w_p_spell = FALSE;	/* No spell checking */
-#endif
-
 #ifdef FEAT_AUTOCMD
-	buf = curbuf;
+    buf = curbuf;
 #endif
-	set_buflisted(FALSE);
+    if ((flags & ECMD_SET_HELP) || keep_help_flag)
+    {
+	prepare_help_buffer();
     }
     else
     {
-#ifdef FEAT_AUTOCMD
-	buf = curbuf;
-#endif
 	/* Don't make a buffer listed if it's a help buffer.  Useful when
 	 * using CTRL-O to go back to a help file. */
 	if (!curbuf->b_help)
@@ -6221,6 +6166,71 @@ find_help_tags(arg, num_matches, matches, keep_lang)
     return OK;
 }
 
+/*
+ * Called when starting to edit a buffer for a help file.
+ */
+    static void
+prepare_help_buffer()
+{
+    char_u	*p;
+
+    curbuf->b_help = TRUE;
+#ifdef FEAT_QUICKFIX
+    set_string_option_direct((char_u *)"buftype", -1,
+				     (char_u *)"help", OPT_FREE|OPT_LOCAL, 0);
+#endif
+
+    /*
+     * Always set these options after jumping to a help tag, because the
+     * user may have an autocommand that gets in the way.
+     * Accept all ASCII chars for keywords, except ' ', '*', '"', '|', and
+     * latin1 word characters (for translated help files).
+     * Only set it when needed, buf_init_chartab() is some work.
+     */
+    p =
+#ifdef EBCDIC
+	    (char_u *)"65-255,^*,^|,^\"";
+#else
+	    (char_u *)"!-~,^*,^|,^\",192-255";
+#endif
+    if (STRCMP(curbuf->b_p_isk, p) != 0)
+    {
+	set_string_option_direct((char_u *)"isk", -1, p, OPT_FREE|OPT_LOCAL, 0);
+	check_buf_options(curbuf);
+	(void)buf_init_chartab(curbuf, FALSE);
+    }
+
+    /* Don't use the global foldmethod.*/
+    set_string_option_direct((char_u *)"fdm", -1, (char_u *)"manual",
+						       OPT_FREE|OPT_LOCAL, 0);
+
+    curbuf->b_p_ts = 8;		/* 'tabstop' is 8 */
+    curwin->w_p_list = FALSE;	/* no list mode */
+
+    curbuf->b_p_ma = FALSE;		/* not modifiable */
+    curbuf->b_p_bin = FALSE;	/* reset 'bin' before reading file */
+    curwin->w_p_nu = 0;		/* no line numbers */
+    curwin->w_p_rnu = 0;		/* no relative line numbers */
+    RESET_BINDING(curwin);		/* no scroll or cursor binding */
+#ifdef FEAT_ARABIC
+    curwin->w_p_arab = FALSE;	/* no arabic mode */
+#endif
+#ifdef FEAT_RIGHTLEFT
+    curwin->w_p_rl  = FALSE;	/* help window is left-to-right */
+#endif
+#ifdef FEAT_FOLDING
+    curwin->w_p_fen = FALSE;	/* No folding in the help window */
+#endif
+#ifdef FEAT_DIFF
+    curwin->w_p_diff = FALSE;	/* No 'diff' */
+#endif
+#ifdef FEAT_SPELL
+    curwin->w_p_spell = FALSE;	/* No spell checking */
+#endif
+
+    set_buflisted(FALSE);
+}
+
 /*
  * After reading a help file: May cleanup a help buffer when syntax
  * highlighting is not used.
-- 
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