ncurses 6.2 - patch 20200829
[ncurses.git] / ncurses / base / lib_hline.c
index 3b0a602eeee936cffd9020e9f8f14898a8671ce0..938c4998343bc44627fb2ad6056803e0cd7ab51d 100644 (file)
@@ -1,5 +1,6 @@
 /****************************************************************************
- * Copyright (c) 1998 Free Software Foundation, Inc.                        *
+ * Copyright 2020 Thomas E. Dickey                                          *
+ * Copyright 1998-2016,2017 Free Software Foundation, Inc.                  *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
 /****************************************************************************
  *  Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995               *
  *     and: Eric S. Raymond <esr@snark.thyrsus.com>                         *
+ *     and: Thomas E. Dickey                        1996-on                 *
+ *     and: Sven Verdoolaege                        2001                    *
  ****************************************************************************/
 
-
-
 /*
 **     lib_hline.c
 **
 
 #include <curses.priv.h>
 
-MODULE_ID("$Id: lib_hline.c,v 1.4 1998/06/28 00:11:01 tom Exp $")
+MODULE_ID("$Id: lib_hline.c,v 1.16 2020/02/02 23:34:34 tom Exp $")
 
-int whline(WINDOW *win, chtype ch, int n)
+NCURSES_EXPORT(int)
+whline(WINDOW *win, chtype ch, int n)
 {
-int   code = ERR;
-short start;
-short end;
+    int code = ERR;
 
-       T((T_CALLED("whline(%p,%s,%d)"), win, _tracechtype(ch), n));
+    T((T_CALLED("whline(%p,%s,%d)"), (void *) win, _tracechtype(ch), n));
 
-       if (win) {
-               struct ldat *line = &(win->_line[win->_cury]);
+    if (win) {
+       struct ldat *line = &(win->_line[win->_cury]);
+       NCURSES_CH_T wch;
+       int start = win->_curx;
+       int end = start + n - 1;
 
-               start = win->_curx;
-               end   = start + n - 1;
-               if (end > win->_maxx)
-                       end   = win->_maxx;
+       if (end > win->_maxx)
+           end = win->_maxx;
 
-               CHANGED_RANGE(line, start, end);
+       CHANGED_RANGE(line, start, end);
 
-               if (ch == 0)
-                       ch = ACS_HLINE;
-               ch = _nc_render(win, ch);
+       if (ch == 0)
+           SetChar2(wch, ACS_HLINE);
+       else
+           SetChar2(wch, ch);
+       wch = _nc_render(win, wch);
 
-               while ( end >= start) {
-                       line->text[end] = ch;
-                       end--;
-               }
-               code = OK;
+#if USE_WIDEC_SUPPORT
+       if (start > 0 && isWidecExt(line->text[start])) {
+           SetChar2(line->text[start - 1], ' ');
+       }
+       if (end < win->_maxx && isWidecExt(line->text[end + 1])) {
+           SetChar2(line->text[end + 1], ' ');
        }
-       returnCode(code);
+#endif
+       while (end >= start) {
+           line->text[end] = wch;
+           end--;
+       }
+
+       _nc_synchook(win);
+       code = OK;
+    }
+    returnCode(code);
 }