From 04958cbaf25eea27eceedaa987adfb354ad5f7fd Mon Sep 17 00:00:00 2001
From: Bram Moolenaar <Bram@vim.org>
Date: Sat, 23 Jun 2018 19:23:02 +0200
Subject: patch 8.1.0105: all tab stops are the same

Problem:    All tab stops are the same.
Solution:   Add the variable tabstop feature. (Christian Brabandt,
            closes #2711)
---
 src/charset.c | 24 +++++++++++++++++++++++-
 1 file changed, 23 insertions(+), 1 deletion(-)

(limited to 'src/charset.c')

diff --git a/src/charset.c b/src/charset.c
index 179fc89db3..a4816887e4 100644
--- a/src/charset.c
+++ b/src/charset.c
@@ -812,7 +812,16 @@ vim_strnsize(char_u *s, int len)
  * Also see getvcol() below.
  */
 
-#define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \
+#ifdef FEAT_VARTABS
+# define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \
+    if (*(p) == TAB && (!(wp)->w_p_list || lcs_tab1)) \
+    { \
+	return tabstop_padding(col, (buf)->b_p_ts, (buf)->b_p_vts_array); \
+    } \
+    else \
+	return ptr2cells(p);
+#else
+# define RET_WIN_BUF_CHARTABSIZE(wp, buf, p, col) \
     if (*(p) == TAB && (!(wp)->w_p_list || lcs_tab1)) \
     { \
 	int ts; \
@@ -821,6 +830,7 @@ vim_strnsize(char_u *s, int len)
     } \
     else \
 	return ptr2cells(p);
+#endif
 
     int
 chartabsize(char_u *p, colnr_T col)
@@ -1221,8 +1231,13 @@ win_nolbr_chartabsize(
 
     if (*s == TAB && (!wp->w_p_list || lcs_tab1))
     {
+# ifdef FEAT_VARTABS
+	return tabstop_padding(col, wp->w_buffer->b_p_ts,
+				    wp->w_buffer->b_p_vts_array);
+# else
 	n = wp->w_buffer->b_p_ts;
 	return (int)(n - (col % n));
+# endif
     }
     n = ptr2cells(s);
     /* Add one cell for a double-width character in the last column of the
@@ -1282,6 +1297,9 @@ getvcol(
     char_u	*line;		/* start of the line */
     int		incr;
     int		head;
+#ifdef FEAT_VARTABS
+    int		*vts = wp->w_buffer->b_p_vts_array;
+#endif
     int		ts = wp->w_buffer->b_p_ts;
     int		c;
 
@@ -1332,7 +1350,11 @@ getvcol(
 	    }
 	    /* A tab gets expanded, depending on the current column */
 	    if (c == TAB)
+#ifdef FEAT_VARTABS
+		incr = tabstop_padding(vcol, ts, vts);
+#else
 		incr = ts - (vcol % ts);
+#endif
 	    else
 	    {
 #ifdef FEAT_MBYTE
-- 
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