Remove 'textmode' option

'textmode' is an option obsoleted for at least 10 years in favor of
'fileformat'.

src/buffer_defs.h

@@ -607,7 +607,6 @@ struct file_buffer {
   long b_p_smc;                 /* 'synmaxcol' */
   char_u      *b_p_syn;         /* 'syntax' */
   long b_p_ts;                  /* 'tabstop' */
-  int b_p_tx;                   /* 'textmode' */
   long b_p_tw;                  /* 'textwidth' */
   long b_p_tw_nobin;            /* b_p_tw saved for binary mode */
   long b_p_tw_nopaste;          /* b_p_tw saved for paste mode */

src/fileio.c

@@ -1608,9 +1608,10 @@ rewind_retry:
         if (fileformat == EOL_UNKNOWN)
           fileformat = default_fileformat();
 
-        /* if editing a new file: may set p_tx and p_ff */
+        // May set 'p_ff' if editing a new file.
-        if (set_options)
+        if (set_options) {
           set_fileformat(fileformat, OPT_LOCAL);
+        }
       }
     }
 

src/misc2.c

@@ -1147,41 +1147,41 @@ get_fileformat_force (
   return EOL_DOS;
 }
 
-/*
+/// Set the current end-of-line type to EOL_UNIX, EOL_MAC, or EOL_DOS.
- * Set the current end-of-line type to EOL_DOS, EOL_UNIX or EOL_MAC.
+///
- * Sets both 'textmode' and 'fileformat'.
+/// Sets 'fileformat'.
- * Note: Does _not_ set global value of 'textmode'!
+///
- */
+/// @param eol_style End-of-line style.
-void 
+/// @param opt_flags OPT_LOCAL and/or OPT_GLOBAL
-set_fileformat (
+void set_fileformat(int eol_style, int opt_flags)
-    int t,
-    int opt_flags                  /* OPT_LOCAL and/or OPT_GLOBAL */
-)
 {
-  char        *p = NULL;
+  char *p = NULL;
 
-  switch (t) {
+  switch (eol_style) {
-  case EOL_DOS:
+      case EOL_UNIX:
-    p = FF_DOS;
+          p = FF_UNIX;
-    curbuf->b_p_tx = TRUE;
+          break;
-    break;
+      case EOL_MAC:
-  case EOL_UNIX:
+          p = FF_MAC;
-    p = FF_UNIX;
+          break;
-    curbuf->b_p_tx = FALSE;
+      case EOL_DOS:
-    break;
+          p = FF_DOS;
-  case EOL_MAC:
+          break;
-    p = FF_MAC;
-    curbuf->b_p_tx = FALSE;
-    break;
   }
-  if (p != NULL)
-    set_string_option_direct((char_u *)"ff", -1, (char_u *)p,
-        OPT_FREE | opt_flags, 0);
 
-  /* This may cause the buffer to become (un)modified. */
+  // p is NULL if "eol_style" is EOL_UNKNOWN.
+  if (p != NULL) {
+    set_string_option_direct((char_u *)"ff",
+                             -1,
+                             (char_u *)p,
+                             OPT_FREE | opt_flags,
+                             0);
+  }
+
+  // This may cause the buffer to become (un)modified.
   check_status(curbuf);
   redraw_tabline = TRUE;
-  need_maketitle = TRUE;            /* set window title later */
+  need_maketitle = TRUE;  // Set window title later.
 }
 
 /*

src/option.c

@@ -165,7 +165,6 @@
 #define PV_TAGS         OPT_BOTH(OPT_BUF(BV_TAGS))
 #define PV_TS           OPT_BUF(BV_TS)
 #define PV_TW           OPT_BUF(BV_TW)
-#define PV_TX           OPT_BUF(BV_TX)
 # define PV_UDF         OPT_BUF(BV_UDF)
 #define PV_WM           OPT_BUF(BV_WM)
 
@@ -280,7 +279,6 @@ static char_u   *p_spf;
 static char_u   *p_spl;
 static long p_ts;
 static long p_tw;
-static int p_tx;
 static int p_udf;
 static long p_wm;
 static char_u   *p_keymap;
@@ -1587,16 +1585,6 @@ static struct vimoption
    (char_u *)&p_ta, PV_NONE,
    {(char_u *)DFLT_TEXTAUTO, (char_u *)TRUE}
    SCRIPTID_INIT},
-  {"textmode",    "tx",   P_BOOL|P_VI_DEF|P_NO_MKRC,
-   (char_u *)&p_tx, PV_TX,
-   {
-#ifdef USE_CRNL
-     (char_u *)TRUE,
-#else
-     (char_u *)FALSE,
-#endif
-     (char_u *)0L
-   } SCRIPTID_INIT},
   {"textwidth",   "tw",   P_NUM|P_VI_DEF|P_VIM|P_RBUF,
    (char_u *)&p_tw, PV_TW,
    {(char_u *)0L, (char_u *)0L} SCRIPTID_INIT},
@@ -4157,11 +4145,6 @@ did_set_string_option (
     else if (check_opt_strings(*varp, p_ff_values, FALSE) != OK)
       errmsg = e_invarg;
     else {
-      /* may also change 'textmode' */
-      if (get_fileformat(curbuf) == EOL_DOS)
-        curbuf->b_p_tx = TRUE;
-      else
-        curbuf->b_p_tx = FALSE;
       redraw_titles();
       /* update flag in swap file */
       ml_setflags(curbuf);
@@ -5272,16 +5255,14 @@ set_bool_option (
           return (char_u *)N_("E590: A preview window already exists");
         }
     }
+  // When 'textauto' is set or reset also change 'fileformats'.
+  } else if ((int *)varp == &p_ta) {
+    set_string_option_direct((char_u *)"ffs",
+                             -1,
+                             p_ta ? (char_u *)DFLT_FFS_VIM : (char_u *)"",
+                             OPT_FREE | opt_flags,
+                             0);
   }
-  /* when 'textmode' is set or reset also change 'fileformat' */
-  else if ((int *)varp == &curbuf->b_p_tx) {
-    set_fileformat(curbuf->b_p_tx ? EOL_DOS : EOL_UNIX, opt_flags);
-  }
-  /* when 'textauto' is set or reset also change 'fileformats' */
-  else if ((int *)varp == &p_ta)
-    set_string_option_direct((char_u *)"ffs", -1,
-        p_ta ? (char_u *)DFLT_FFS_VIM : (char_u *)"",
-        OPT_FREE | opt_flags, 0);
 
   /*
    * When 'lisp' option changes include/exclude '-' in
@@ -6844,7 +6825,6 @@ static char_u *get_varp(struct vimoption *p)
   case PV_SW:     return (char_u *)&(curbuf->b_p_sw);
   case PV_TS:     return (char_u *)&(curbuf->b_p_ts);
   case PV_TW:     return (char_u *)&(curbuf->b_p_tw);
-  case PV_TX:     return (char_u *)&(curbuf->b_p_tx);
   case PV_UDF:    return (char_u *)&(curbuf->b_p_udf);
   case PV_WM:     return (char_u *)&(curbuf->b_p_wm);
   case PV_KMAP:   return (char_u *)&(curbuf->b_p_keymap);
@@ -7030,7 +7010,6 @@ void buf_copy_options(buf_T *buf, int flags)
       if (!buf->b_p_initialized) {
         free_buf_options(buf, TRUE);
         buf->b_p_ro = FALSE;                    /* don't copy readonly */
-        buf->b_p_tx = p_tx;
         buf->b_p_fenc = vim_strsave(p_fenc);
         buf->b_p_ff = vim_strsave(p_ff);
         buf->b_p_bh = empty_option;