vi_mode.c

在非GUI环境下

	 function. */
      last_is_ident = _rl_isident (rl_line_buffer[rl_point - 1]);
      if ((_rl_isident (rl_line_buffer[rl_point]) && !last_is_ident) ||
	  (!_rl_isident (rl_line_buffer[rl_point]) && last_is_ident))
	rl_point--;

      while (rl_point > 0 && whitespace (rl_line_buffer[rl_point]))
	rl_point--;

      if (rl_point > 0)
	{
	  if (_rl_isident (rl_line_buffer[rl_point]))
	    while (--rl_point >= 0 && _rl_isident (rl_line_buffer[rl_point]));
	  else
	    while (--rl_point >= 0 && !_rl_isident (rl_line_buffer[rl_point]) &&
		   !whitespace (rl_line_buffer[rl_point]));
	  rl_point++;
	}
    }
  return (0);
}

int
rl_vi_eword (count, ignore)
     int count, ignore;
{
  while (count-- && rl_point < rl_end - 1)
    {
      if (!whitespace (rl_line_buffer[rl_point]))
	rl_point++;

      while (rl_point < rl_end && whitespace (rl_line_buffer[rl_point]))
	rl_point++;

      if (rl_point < rl_end)
	{
	  if (_rl_isident (rl_line_buffer[rl_point]))
	    while (++rl_point < rl_end && _rl_isident (rl_line_buffer[rl_point]));
	  else
	    while (++rl_point < rl_end && !_rl_isident (rl_line_buffer[rl_point])
		   && !whitespace (rl_line_buffer[rl_point]));
	}
      rl_point--;
    }
  return (0);
}

int
rl_vi_insert_beg (count, key)
     int count, key;
{
  rl_beg_of_line (1, key);
  rl_vi_insertion_mode (1, key);
  return (0);
}

int
rl_vi_append_mode (count, key)
     int count, key;
{
  if (rl_point < rl_end)
    {
      if (MB_CUR_MAX == 1 || rl_byte_oriented)
	rl_point++;
      else
        {
          int point = rl_point;
          rl_forward_char (1, key);
          if (point == rl_point)
            rl_point = rl_end;
        }
    }
  rl_vi_insertion_mode (1, key);
  return (0);
}

int
rl_vi_append_eol (count, key)
     int count, key;
{
  rl_end_of_line (1, key);
  rl_vi_append_mode (1, key);
  return (0);
}

/* What to do in the case of C-d. */
int
rl_vi_eof_maybe (count, c)
     int count, c;
{
  return (rl_newline (1, '\n'));
}

/* Insertion mode stuff. */

/* Switching from one mode to the other really just involves
   switching keymaps. */
int
rl_vi_insertion_mode (count, key)
     int count, key;
{
  _rl_keymap = vi_insertion_keymap;
  _rl_vi_last_key_before_insert = key;
  return (0);
}

static void
_rl_vi_save_insert (up)
      UNDO_LIST *up;
{
  int len, start, end;

  if (up == 0)
    {
      if (vi_insert_buffer_size >= 1)
	vi_insert_buffer[0] = '\0';
      return;
    }

  start = up->start;
  end = up->end;
  len = end - start + 1;
  if (len >= vi_insert_buffer_size)
    {
      vi_insert_buffer_size += (len + 32) - (len % 32);
      vi_insert_buffer = (char *)xrealloc (vi_insert_buffer, vi_insert_buffer_size);
    }
  strncpy (vi_insert_buffer, rl_line_buffer + start, len - 1);
  vi_insert_buffer[len-1] = '\0';
}
    
void
_rl_vi_done_inserting ()
{
  if (_rl_vi_doing_insert)
    {
      /* The `C', `s', and `S' commands set this. */
      rl_end_undo_group ();
      /* Now, the text between rl_undo_list->next->start and
	 rl_undo_list->next->end is what was inserted while in insert
	 mode.  It gets copied to VI_INSERT_BUFFER because it depends
	 on absolute indices into the line which may change (though they
	 probably will not). */
      _rl_vi_doing_insert = 0;
      _rl_vi_save_insert (rl_undo_list->next);
      vi_continued_command = 1;
    }
  else
    {
      if ((_rl_vi_last_key_before_insert == 'i' || _rl_vi_last_key_before_insert == 'a') && rl_undo_list)
        _rl_vi_save_insert (rl_undo_list);
      /* XXX - Other keys probably need to be checked. */
      else if (_rl_vi_last_key_before_insert == 'C')
	rl_end_undo_group ();
      while (_rl_undo_group_level > 0)
	rl_end_undo_group ();
      vi_continued_command = 0;
    }
}

int
rl_vi_movement_mode (count, key)
     int count, key;
{
  if (rl_point > 0)
    rl_backward_char (1, key);

  _rl_keymap = vi_movement_keymap;
  _rl_vi_done_inserting ();
  return (0);
}

int
rl_vi_arg_digit (count, c)
     int count, c;
{
  if (c == '0' && rl_numeric_arg == 1 && !rl_explicit_arg)
    return (rl_beg_of_line (1, c));
  else
    return (rl_digit_argument (count, c));
}

/* Change the case of the next COUNT characters. */
#if defined (HANDLE_MULTIBYTE)
static int
_rl_vi_change_mbchar_case (count)
     int count;
{
  wchar_t wc;
  char mb[MB_LEN_MAX+1];
  int mblen;
  mbstate_t ps;

  memset (&ps, 0, sizeof (mbstate_t));
  if (_rl_adjust_point (rl_line_buffer, rl_point, &ps) > 0)
    count--;
  while (count-- && rl_point < rl_end)
    {
      mbrtowc (&wc, rl_line_buffer + rl_point, rl_end - rl_point, &ps);
      if (iswupper (wc))
	wc = towlower (wc);
      else if (iswlower (wc))
	wc = towupper (wc);
      else
	{
	  /* Just skip over chars neither upper nor lower case */
	  rl_forward_char (1, 0);
	  continue;
	}

      /* Vi is kind of strange here. */
      if (wc)
	{
	  mblen = wcrtomb (mb, wc, &ps);
	  if (mblen >= 0)
	    mb[mblen] = '\0';
	  rl_begin_undo_group ();
	  rl_delete (1, 0);
	  rl_insert_text (mb);
	  rl_end_undo_group ();
	  rl_vi_check ();
	}
      else
        rl_forward_char (1, 0);
    }

  return 0;
}
#endif

int
rl_vi_change_case (count, ignore)
     int count, ignore;
{
  int c, p;

  /* Don't try this on an empty line. */
  if (rl_point >= rl_end)
    return (0);

  c = 0;
#if defined (HANDLE_MULTIBYTE)
  if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
    return (_rl_vi_change_mbchar_case (count));
#endif

  while (count-- && rl_point < rl_end)
    {
      if (_rl_uppercase_p (rl_line_buffer[rl_point]))
	c = _rl_to_lower (rl_line_buffer[rl_point]);
      else if (_rl_lowercase_p (rl_line_buffer[rl_point]))
	c = _rl_to_upper (rl_line_buffer[rl_point]);
      else
	{
	  /* Just skip over characters neither upper nor lower case. */
	  rl_forward_char (1, c);
	  continue;
	}

      /* Vi is kind of strange here. */
      if (c)
	{
	  p = rl_point;
	  rl_begin_undo_group ();
	  rl_vi_delete (1, c);
	  if (rl_point < p)	/* Did we retreat at EOL? */
	    rl_point++;
	  _rl_insert_char (1, c);
	  rl_end_undo_group ();
	  rl_vi_check ();
        }
      else
	rl_forward_char (1, c);
    }
  return (0);
}

int
rl_vi_put (count, key)
     int count, key;
{
  if (!_rl_uppercase_p (key) && (rl_point + 1 <= rl_end))
    rl_point = _rl_find_next_mbchar (rl_line_buffer, rl_point, 1, MB_FIND_NONZERO);

  while (count--)
    rl_yank (1, key);

  rl_backward_char (1, key);
  return (0);
}

int
rl_vi_check ()
{
  if (rl_point && rl_point == rl_end)
    {
      if (MB_CUR_MAX > 1 && rl_byte_oriented == 0)
	rl_point = _rl_find_prev_mbchar (rl_line_buffer, rl_point, MB_FIND_NONZERO);
      else
        rl_point--;
    }
  return (0);
}

int
rl_vi_column (count, key)
     int count, key;
{
  if (count > rl_end)
    rl_end_of_line (1, key);
  else
    rl_point = count - 1;
  return (0);
}

int
rl_vi_domove (key, nextkey)
     int key, *nextkey;
{
  int c, save;
  int old_end;

  rl_mark = rl_point;
  RL_SETSTATE(RL_STATE_MOREINPUT);
  c = rl_read_key ();
  RL_UNSETSTATE(RL_STATE_MOREINPUT);
  *nextkey = c;

  if (!member (c, vi_motion))
    {
      if (_rl_digit_p (c))
	{
	  save = rl_numeric_arg;
	  rl_numeric_arg = _rl_digit_value (c);
	  rl_explicit_arg = 1;
	  rl_digit_loop1 ();
	  rl_numeric_arg *= save;
	  RL_SETSTATE(RL_STATE_MOREINPUT);
	  c = rl_read_key ();	/* real command */
	  RL_UNSETSTATE(RL_STATE_MOREINPUT);
	  *nextkey = c;
	}
      else if (key == c && (key == 'd' || key == 'y' || key == 'c'))
	{
	  rl_mark = rl_end;
	  rl_beg_of_line (1, c);
	  _rl_vi_last_motion = c;
	  return (0);
	}
      else
	return (-1);
    }

  _rl_vi_last_motion = c;

  /* Append a blank character temporarily so that the motion routines
     work right at the end of the line. */
  old_end = rl_end;
  rl_line_buffer[rl_end++] = ' ';
  rl_line_buffer[rl_end] = '\0';

  _rl_dispatch (c, _rl_keymap);

  /* Remove the blank that we added. */
  rl_end = old_end;
  rl_line_buffer[rl_end] = '\0';
  if (rl_point > rl_end)
    rl_point = rl_end;

  /* No change in position means the command failed. */
  if (rl_mark == rl_point)
    return (-1);

  /* rl_vi_f[wW]ord () leaves the cursor on the first character of the next
     word.  If we are not at the end of the line, and we are on a
     non-whitespace character, move back one (presumably to whitespace). */
  if ((_rl_to_upper (c) == 'W') && rl_point < rl_end && rl_point > rl_mark &&
      !whitespace (rl_line_buffer[rl_point]))
    rl_point--;

  /* If cw or cW, back up to the end of a word, so the behaviour of ce
     or cE is the actual result.  Brute-force, no subtlety. */
  if (key == 'c' && rl_point >= rl_mark && (_rl_to_upper (c) == 'W'))
    {
      /* Don't move farther back than where we started. */
      while (rl_point > rl_mark && whitespace (rl_line_buffer[rl_point]))
	rl_point--;

      /* Posix.2 says that if cw or cW moves the cursor towards the end of
	 the line, the character under the cursor should be deleted. */
      if (rl_point == rl_mark)
        rl_point++;
      else
	{
	  /* Move past the end of the word so that the kill doesn't
	     remove the last letter of the previous word.  Only do this
	     if we are not at the end of the line. */
	  if (rl_point >= 0 && rl_point < (rl_end - 1) && !whitespace (rl_line_buffer[rl_point]))
	    rl_point++;
	}
    }

  if (rl_mark < rl_point)
    SWAP (rl_point, rl_mark);

  return (0);
}

/* A simplified loop for vi. Don't dispatch key at end.
   Don't recognize minus sign?
   Should this do rl_save_prompt/rl_restore_prompt? */
static int
rl_digit_loop1 ()
{
  int key, c;

  RL_SETSTATE(RL_STATE_NUMERICARG);
  while (1)
    {
      if (rl_numeric_arg > 1000000)
	{
	  rl_explicit_arg = rl_numeric_arg = 0;
	  rl_ding ();
	  rl_clear_message ();
	  RL_UNSETSTATE(RL_STATE_NUMERICARG);
	  return 1;
	}
      rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg);
      RL_SETSTATE(RL_STATE_MOREINPUT);
      key = c = rl_read_key ();
      RL_UNSETSTATE(RL_STATE_MOREINPUT);

      if (c >= 0 && _rl_keymap[c].type == ISFUNC &&
	  _rl_keymap[c].function == rl_universal_argument)
	{
	  rl_numeric_arg *= 4;
	  continue;
	}

      c = UNMETA (c);
      if (_rl_digit_p (c))
	{
	  if (rl_explicit_arg)
	    rl_numeric_arg = (rl_numeric_arg * 10) + _rl_digit_value (c);
	  else
	    rl_numeric_arg = _rl_digit_value (c);
	  rl_explicit_arg = 1;
	}
      else
	{
	  rl_clear_message ();
	  rl_stuff_char (key);
	  break;
	}
    }

  RL_UNSETSTATE(RL_STATE_NUMERICARG);
  return (0);
}

int
rl_vi_delete_to (count, key)
     int count, key;
{
  int c;

  if (_rl_uppercase_p (key))
    rl_stuff_char ('$');
  else if (vi_redoing)
    rl_stuff_char (_rl_vi_last_motion);

  if (rl_vi_domove (key, &c))
    {
      rl_ding ();
      return -1;
    }

  /* These are the motion commands that do not require adjusting the
     mark. */
  if ((strchr (" l|h^0bB", c) == 0) && (rl_mark < rl_end))
    rl_mark++;

  rl_kill_text (rl_point, rl_mark);
  return (0);
}

int
rl_vi_change_to (count, key)
     int count, key;
{
  int c, start_pos;

  if (_rl_uppercase_p (key))
    rl_stuff_char ('$');
  else if (vi_redoing)
    rl_stuff_char (_rl_vi_last_motion);

  start_pos = rl_point;

  if (rl_vi_domove (key, &c))
    {
      rl_ding ();