Bash-4.3 distribution sources and documentation

[platform/upstream/bash.git] / lib / readline / terminal.c

diff --git a/lib/readline/terminal.c b/lib/readline/terminal.c
index f8c2f6e..1212ec4 100644 (file)
--- a/lib/readline/terminal.c
+++ b/lib/readline/terminal.c
@@ -55,6 +55,10 @@
 #  include <sys/ioctl.h>
 #endif /* GWINSZ_IN_SYS_IOCTL && !TIOCGWINSZ */
 
+#ifdef __MSDOS__
+#  include <pc.h>
+#endif
+
 #include "rltty.h"
 #include "tcap.h"
 
@@ -77,22 +81,25 @@ static void _win_get_screensize PARAMS((int *, int *));
 static void _emx_get_screensize PARAMS((int *, int *));
 #endif
 
-#define CUSTOM_REDISPLAY_FUNC() (rl_redisplay_function != rl_redisplay)
-#define CUSTOM_INPUT_FUNC() (rl_getc_function != rl_getc)
-
-/*  If the calling application sets this to a non-zero value, readline will
-    use the $LINES and $COLUMNS environment variables to set its idea of the
-    window size before interrogating the kernel. */
+/* If the calling application sets this to a non-zero value, readline will
+   use the $LINES and $COLUMNS environment variables to set its idea of the
+   window size before interrogating the kernel. */
 int rl_prefer_env_winsize = 0;
 
+/* If this is non-zero, readline will set LINES and COLUMNS in the
+   environment when it handles SIGWINCH. */
+int rl_change_environment = 1;
+
 /* **************************************************************** */
 /*                                                                 */
 /*                     Terminal and Termcap                        */
 /*                                                                 */
 /* **************************************************************** */
 
+#ifndef __MSDOS__
 static char *term_buffer = (char *)NULL;
 static char *term_string_buffer = (char *)NULL;
+#endif
 
 static int tcap_initialized;
 
@@ -264,7 +271,10 @@ _rl_get_screen_size (tty, ignore_env)
       if (_rl_screenwidth <= 0)
         _rl_screenwidth = wc;
 
-#if !defined (__DJGPP__)
+#if defined (__DJGPP__)
+      if (_rl_screenwidth <= 0)
+       _rl_screenwidth = ScreenCols ();
+#else
       if (_rl_screenwidth <= 0 && term_string_buffer)
        _rl_screenwidth = tgetnum ("co");
 #endif
@@ -280,7 +290,10 @@ _rl_get_screen_size (tty, ignore_env)
       if (_rl_screenheight <= 0)
         _rl_screenheight = wr;
 
-#if !defined (__DJGPP__)
+#if defined (__DJGPP__)
+      if (_rl_screenheight <= 0)
+       _rl_screenheight = ScreenRows ();
+#else
       if (_rl_screenheight <= 0 && term_string_buffer)
        _rl_screenheight = tgetnum ("li");
 #endif
@@ -296,7 +309,8 @@ _rl_get_screen_size (tty, ignore_env)
   /* If we're being compiled as part of bash, set the environment
      variables $LINES and $COLUMNS to new values.  Otherwise, just
      do a pair of putenv () or setenv () calls. */
-  sh_set_lines_and_columns (_rl_screenheight, _rl_screenwidth);
+  if (rl_change_environment)
+    sh_set_lines_and_columns (_rl_screenheight, _rl_screenwidth);
 
   if (_rl_term_autowrap == 0)
     _rl_screenwidth--;
@@ -346,7 +360,13 @@ rl_reset_screen_size ()
 {
   _rl_get_screen_size (fileno (rl_instream), 0);
 }
-     
+
+void
+_rl_sigwinch_resize_terminal ()
+{
+  _rl_get_screen_size (fileno (rl_instream), 1);
+}
+       
 void
 rl_resize_terminal ()
 {
@@ -432,6 +452,23 @@ _rl_init_terminal_io (terminal_name)
   if (term == 0)
     term = "dumb";
 
+#ifdef __MSDOS__
+  _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_mm = _rl_term_mo = (char *)NULL;
+  _rl_terminal_can_insert = term_has_meta = _rl_term_autowrap = 0;
+  _rl_term_cr = "\r";
+  _rl_term_clreol = _rl_term_clrpag = _rl_term_backspace = (char *)NULL;
+  _rl_term_goto = _rl_term_pc = _rl_term_ip = (char *)NULL;
+  _rl_term_ks = _rl_term_ke =_rl_term_vs = _rl_term_ve = (char *)NULL;
+  _rl_term_kh = _rl_term_kH = _rl_term_at7 = _rl_term_kI = (char *)NULL;
+#if defined(HACK_TERMCAP_MOTION)
+  _rl_term_forward_char = (char *)NULL;
+#endif
+
+  _rl_get_screen_size (tty, 0);
+#else  /* !__MSDOS__ */
   /* I've separated this out for later work on not calling tgetent at all
      if the calling application has supplied a custom redisplay function,
      (and possibly if the application has supplied a custom input function). */
@@ -531,6 +568,7 @@ _rl_init_terminal_io (terminal_name)
   term_has_meta = tgetflag ("km") != 0;
   if (term_has_meta == 0)
     _rl_term_mm = _rl_term_mo = (char *)NULL;
+#endif /* !__MSDOS__ */
 
   /* Attempt to find and bind the arrow keys.  Do not override already
      bound keys in an overzealous attempt, however. */
@@ -628,10 +666,12 @@ _rl_backspace (count)
 {
   register int i;
 
+#ifndef __MSDOS__
   if (_rl_term_backspace)
     for (i = 0; i < count; i++)
       tputs (_rl_term_backspace, 1, _rl_output_character_function);
   else
+#endif
     for (i = 0; i < count; i++)
       putc ('\b', _rl_out_stream);
   return 0;
@@ -663,7 +703,11 @@ rl_ding ()
        case VISIBLE_BELL:
          if (_rl_visible_bell)
            {
+#ifdef __DJGPP__
+             ScreenVisualBell ();
+#else
              tputs (_rl_visible_bell, 1, _rl_output_character_function);
+#endif
              break;
            }
          /* FALLTHROUGH */
@@ -683,12 +727,29 @@ rl_ding ()
 /*                                                                 */
 /* **************************************************************** */
 
+static int enabled_meta = 0;   /* flag indicating we enabled meta mode */
+
 void
 _rl_enable_meta_key ()
 {
 #if !defined (__DJGPP__)
   if (term_has_meta && _rl_term_mm)
-    tputs (_rl_term_mm, 1, _rl_output_character_function);
+    {
+      tputs (_rl_term_mm, 1, _rl_output_character_function);
+      enabled_meta = 1;
+    }
+#endif
+}
+
+void
+_rl_disable_meta_key ()
+{
+#if !defined (__DJGPP__)
+  if (term_has_meta && _rl_term_mo && enabled_meta)
+    {
+      tputs (_rl_term_mo, 1, _rl_output_character_function);
+      enabled_meta = 0;
+    }
 #endif
 }
 
@@ -718,6 +779,7 @@ void
 _rl_set_cursor (im, force)
      int im, force;
 {
+#ifndef __MSDOS__
   if (_rl_term_ve && _rl_term_vs)
     {
       if (force || im != rl_insert_mode)
@@ -728,4 +790,5 @@ _rl_set_cursor (im, force)
            tputs (_rl_term_ve, 1, _rl_output_character_function);
        }
     }
+#endif
 }