Readline 5.1 import for HEAD.

1 files changed, 69 insertions, 33 deletions

diff --git a/readline/terminal.c b/readline/terminal.c
index ce45d28d024..21732a791bb 100644
--- a/readline/terminal.c
+++ b/readline/terminal.c
@@ -1,6 +1,6 @@
 /* terminal.c -- controlling the terminal with termcap. */
 
-/* Copyright (C) 1996 Free Software Foundation, Inc.
+/* Copyright (C) 1996-2005 Free Software Foundation, Inc.
 
    This file is part of the GNU Readline Library, a library for
    reading lines of text with interactive input and history editing.
@@ -78,6 +78,8 @@
 #define CUSTOM_REDISPLAY_FUNC() (rl_redisplay_function != rl_redisplay)
 #define CUSTOM_INPUT_FUNC() (rl_getc_function != rl_getc)
 
+int rl_prefer_env_winsize;
+
 /* **************************************************************** */
 /*								    */
 /*			Terminal and Termcap			    */
@@ -87,9 +89,6 @@
 #ifndef __MSDOS__
 static char *term_buffer = (char *)NULL;
 static char *term_string_buffer = (char *)NULL;
-
-/* Non-zero means this terminal can't really do anything. */
-static int dumb_term;
 #endif /* !__MSDOS__ */
 
 static int tcap_initialized;
@@ -134,7 +133,7 @@ char *_rl_term_up;
 static char *_rl_visible_bell;
 
 /* Non-zero means the terminal can auto-wrap lines. */
-int _rl_term_autowrap;
+int _rl_term_autowrap = -1;
 
 /* Non-zero means that this terminal has a meta key. */
 static int term_has_meta;
@@ -159,6 +158,9 @@ static char *_rl_term_kh;
 static char *_rl_term_kH;
 static char *_rl_term_at7;	/* @7 */
 
+/* Delete key */
+static char *_rl_term_kD;
+
 /* Insert key */
 static char *_rl_term_kI;
 
@@ -205,12 +207,14 @@ _rl_get_screen_size (tty, ignore_env)
 #if defined (TIOCGWINSZ)
   struct winsize window_size;
 #endif /* TIOCGWINSZ */
+  int wr, wc;
 
+  wr = wc = -1;
 #if defined (TIOCGWINSZ)
   if (ioctl (tty, TIOCGWINSZ, &window_size) == 0)
     {
-      _rl_screenwidth = (int) window_size.ws_col;
-      _rl_screenheight = (int) window_size.ws_row;
+      wc = (int) window_size.ws_col;
+      wr = (int) window_size.ws_row;
     }
 #endif /* TIOCGWINSZ */
 
@@ -232,13 +236,25 @@ _rl_get_screen_size (tty, ignore_env)
   _emx_get_screensize (&_rl_screenwidth, &_rl_screenheight);
 #endif
 
+  if (ignore_env || rl_prefer_env_winsize == 0)
+    {
+      _rl_screenwidth = wc;
+      _rl_screenheight = wr;
+    }
+  else
+    _rl_screenwidth = _rl_screenheight = -1;
+
   /* Environment variable COLUMNS overrides setting of "co" if IGNORE_ENV
-     is unset. */
+     is unset.  If we prefer the environment, check it first before
+     assigning the value returned by the kernel. */
   if (_rl_screenwidth <= 0)
     {
       if (ignore_env == 0 && (ss = sh_get_env_value ("COLUMNS")))
 	_rl_screenwidth = atoi (ss);
 
+      if (_rl_screenwidth <= 0)
+        _rl_screenwidth = wc;
+
 #if defined (__DJGPP__)
       if (_rl_screenwidth <= 0)
 	_rl_screenwidth = ScreenCols ();
@@ -255,6 +271,9 @@ _rl_get_screen_size (tty, ignore_env)
       if (ignore_env == 0 && (ss = sh_get_env_value ("LINES")))
 	_rl_screenheight = atoi (ss);
 
+      if (_rl_screenheight <= 0)
+        _rl_screenheight = wr;
+
 #if defined (__DJGPP__)
       if (_rl_screenheight <= 0)
 	_rl_screenheight = ScreenRows ();
@@ -286,16 +305,20 @@ void
 _rl_set_screen_size (rows, cols)
      int rows, cols;
 {
-  if (rows == 0 || cols == 0)
-    return;
+  if (_rl_term_autowrap == -1)
+    _rl_init_terminal_io (rl_terminal_name);
 
-  _rl_screenheight = rows;
-  _rl_screenwidth = cols;
-
-  if (_rl_term_autowrap == 0)
-    _rl_screenwidth--;
+  if (rows > 0)
+    _rl_screenheight = rows;
+  if (cols > 0)
+    {
+      _rl_screenwidth = cols;
+      if (_rl_term_autowrap == 0)
+	_rl_screenwidth--;
+    }
 
-  _rl_screenchars = _rl_screenwidth * _rl_screenheight;
+  if (rows > 0 || cols > 0)
+    _rl_screenchars = _rl_screenwidth * _rl_screenheight;
 }
 
 void
@@ -314,6 +337,12 @@ rl_get_screen_size (rows, cols)
   if (cols)
     *cols = _rl_screenwidth;
 }
+
+void
+rl_reset_screen_size ()
+{
+  _rl_get_screen_size (fileno (rl_instream), 0);
+}
      
 void
 rl_resize_terminal ()
@@ -347,6 +376,7 @@ static struct _tc_string tc_strings[] =
   { "ei", &_rl_term_ei },
   { "ic", &_rl_term_ic },
   { "im", &_rl_term_im },
+  { "kD", &_rl_term_kD },	/* delete */
   { "kH", &_rl_term_kH },	/* home down ?? */
   { "kI", &_rl_term_kI },	/* insert */
   { "kd", &_rl_term_kd },
@@ -381,11 +411,7 @@ get_term_capabilities (bp)
   register int i;
 
   for (i = 0; i < NUM_TC_STRINGS; i++)
-#  ifdef __LCC__
     *(tc_strings[i].tc_value) = tgetstr ((char *)tc_strings[i].tc_var, bp);
-#  else
-    *(tc_strings[i].tc_value) = tgetstr (tc_strings[i].tc_var, bp);
-#  endif
 #endif
   tcap_initialized = 1;
 }
@@ -401,7 +427,6 @@ _rl_init_terminal_io (terminal_name)
   term = terminal_name ? terminal_name : sh_get_env_value ("TERM");
   _rl_term_clrpag = _rl_term_cr = _rl_term_clreol = (char *)NULL;
   tty = rl_instream ? fileno (rl_instream) : 0;
-  _rl_screenwidth = _rl_screenheight = 0;
 
   if (term == 0)
     term = "dumb";
@@ -451,12 +476,17 @@ _rl_init_terminal_io (terminal_name)
 
       _rl_term_autowrap = 0;	/* used by _rl_get_screen_size */
 
+      /* Allow calling application to set default height and width, using
+	 rl_set_screen_size */
+      if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
+	{
 #if defined (__EMX__)
-      _emx_get_screensize (&_rl_screenwidth, &_rl_screenheight);
-      _rl_screenwidth--;
+	  _emx_get_screensize (&_rl_screenwidth, &_rl_screenheight);
+	  _rl_screenwidth--;
 #else /* !__EMX__ */
-      _rl_get_screen_size (tty, 0);
+	  _rl_get_screen_size (tty, 0);
 #endif /* !__EMX__ */
+	}
 
       /* Defaults. */
       if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
@@ -471,7 +501,7 @@ _rl_init_terminal_io (terminal_name)
       _rl_term_im = _rl_term_ei = _rl_term_ic = _rl_term_IC = (char *)NULL;
       _rl_term_up = _rl_term_dc = _rl_term_DC = _rl_visible_bell = (char *)NULL;
       _rl_term_ku = _rl_term_kd = _rl_term_kl = _rl_term_kr = (char *)NULL;
-      _rl_term_kh = _rl_term_kH = _rl_term_kI = (char *)NULL;
+      _rl_term_kh = _rl_term_kH = _rl_term_kI = _rl_term_kD = (char *)NULL;
       _rl_term_ks = _rl_term_ke = _rl_term_at7 = (char *)NULL;
       _rl_term_mm = _rl_term_mo = (char *)NULL;
       _rl_term_ve = _rl_term_vs = (char *)NULL;
@@ -503,7 +533,10 @@ _rl_init_terminal_io (terminal_name)
 
   _rl_term_autowrap = tgetflag ("am") && tgetflag ("xn");
 
-  _rl_get_screen_size (tty, 0);
+  /* Allow calling application to set default height and width, using
+     rl_set_screen_size */
+  if (_rl_screenwidth <= 0 || _rl_screenheight <= 0)
+    _rl_get_screen_size (tty, 0);
 
   /* "An application program can assume that the terminal can do
       character insertion if *any one of* the capabilities `IC',
@@ -542,13 +575,15 @@ bind_termcap_arrow_keys (map)
   xkeymap = _rl_keymap;
   _rl_keymap = map;
 
-  _rl_bind_if_unbound (_rl_term_ku, rl_get_previous_history);
-  _rl_bind_if_unbound (_rl_term_kd, rl_get_next_history);
-  _rl_bind_if_unbound (_rl_term_kr, rl_forward);
-  _rl_bind_if_unbound (_rl_term_kl, rl_backward);
+  rl_bind_keyseq_if_unbound (_rl_term_ku, rl_get_previous_history);
+  rl_bind_keyseq_if_unbound (_rl_term_kd, rl_get_next_history);
+  rl_bind_keyseq_if_unbound (_rl_term_kr, rl_forward_char);
+  rl_bind_keyseq_if_unbound (_rl_term_kl, rl_backward_char);
+
+  rl_bind_keyseq_if_unbound (_rl_term_kh, rl_beg_of_line);	/* Home */
+  rl_bind_keyseq_if_unbound (_rl_term_at7, rl_end_of_line);	/* End */
 
-  _rl_bind_if_unbound (_rl_term_kh, rl_beg_of_line);	/* Home */
-  _rl_bind_if_unbound (_rl_term_at7, rl_end_of_line);	/* End */
+  rl_bind_keyseq_if_unbound (_rl_term_kD, rl_delete);
 
   _rl_keymap = xkeymap;
 }
@@ -575,6 +610,7 @@ int
 rl_reset_terminal (terminal_name)
      const char *terminal_name;
 {
+  _rl_screenwidth = _rl_screenheight = 0;
   _rl_init_terminal_io (terminal_name);
   return 0;
 }
@@ -656,8 +692,8 @@ rl_ding ()
 	      tputs (_rl_visible_bell, 1, _rl_output_character_function);
 	      break;
 	    }
-#endif
 	  /* FALLTHROUGH */
+#endif
 	case AUDIBLE_BELL:
 	  fprintf (stderr, "\007");
 	  fflush (stderr);