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/* vi_mode.c -- A vi emulation mode for Bash.
Derived from code written by Jeff Sparkes (jeff1@????).
*/
/* **************************************************************** */
/* */
/* VI Emulation Mode */
/* */
/* **************************************************************** */
/* Last string searched for from `/' or `?'. */
static char *vi_last_search = (char *)NULL;
static int vi_histpos;
/* Non-zero means enter insertion mode. */
int vi_doing_insert = 0;
/* *** UNCLEAN *** */
/* Command keys which do movement for xxx_to commands. */
static char *vi_motion = " hl^$0ftFt;,%wbeWBE|";
/* Keymap used for vi replace characters. Created dynamically since
rarely used. */
static Keymap vi_replace_map = (Keymap)NULL;
/* The number of characters inserted in the last replace operation. */
static vi_replace_count = 0;
/* Yank the nth arg from the previous line into this line at point. */
rl_vi_yank_arg (count)
int count;
{
rl_yank_nth_arg (count, 0);
}
/* Search again for the last thing searched for. */
rl_vi_search_again (ignore, key)
int ignore, key;
{
switch (key)
{
case 'n':
rl_vi_dosearch (vi_last_search, -1);
break;
case 'N':
rl_vi_dosearch (vi_last_search, 1);
break;
}
}
/* Do a vi style search. */
rl_vi_search (count, key)
int count, key;
{
int dir, c, save_pos;
char *p;
switch (key)
{
case '?':
dir = 1;
break;
case '/':
dir = -1;
break;
default:
ding ();
return;
}
vi_histpos = where_history ();
maybe_save_line ();
save_pos = rl_point;
/* Reuse the line input buffer to read the search string. */
the_line[0] = 0;
rl_end = rl_point = 0;
p = (char *)alloca (2 + (rl_prompt ? strlen (rl_prompt) : 0));
sprintf (p, "%s%c", rl_prompt ? rl_prompt : "", key);
rl_message (p, 0, 0);
while (c = rl_read_key ())
{
switch (c)
{
case CTRL('H'):
case RUBOUT:
if (rl_point == 0)
{
maybe_unsave_line ();
rl_clear_message ();
rl_point = save_pos;
return;
}
case CTRL('W'):
case CTRL('U'):
rl_dispatch (c, keymap);
break;
case ESC:
case RETURN:
case NEWLINE:
goto dosearch;
break;
case CTRL('C'):
maybe_unsave_line ();
rl_clear_message ();
rl_point = 0;
ding ();
return;
default:
rl_insert (1, c);
break;
}
rl_redisplay ();
}
dosearch:
if (vi_last_search)
free (vi_last_search);
vi_last_search = savestring (the_line);
rl_vi_dosearch (the_line, dir);
}
rl_vi_dosearch (string, dir)
char *string;
int dir;
{
int old, save = vi_histpos;
HIST_ENTRY *h;
if (string == 0 || *string == 0 || vi_histpos < 0)
{
ding ();
return;
}
if ((save = history_search_pos (string, dir, vi_histpos + dir)) == -1)
{
maybe_unsave_line ();
rl_clear_message ();
rl_point = 0;
ding ();
return;
}
vi_histpos = save;
old = where_history ();
history_set_pos (vi_histpos);
h = current_history ();
history_set_pos (old);
strcpy (the_line, h->line);
rl_undo_list = (UNDO_LIST *)h->data;
rl_end = strlen (the_line);
rl_point = 0;
rl_clear_message ();
}
/* Completion, from vi's point of view. */
rl_vi_complete (ignore, key)
int ignore, key;
{
if ((rl_point < rl_end) && (!whitespace (the_line[rl_point])))
{
if (!whitespace (the_line[rl_point + 1]))
rl_vi_end_word (1, 'E');
rl_point++;
}
if (key == '*')
rl_complete_internal ('*');
else
rl_complete (0, key);
rl_vi_insertion_mode ();
}
/* Previous word in vi mode. */
rl_vi_prev_word (count, key)
int count, key;
{
if (count < 0)
{
rl_vi_next_word (-count, key);
return;
}
if (uppercase_p (key))
rl_vi_bWord (count);
else
rl_vi_bword (count);
}
/* Next word in vi mode. */
rl_vi_next_word (count, key)
int count;
{
if (count < 0)
{
rl_vi_prev_word (-count, key);
return;
}
if (uppercase_p (key))
rl_vi_fWord (count);
else
rl_vi_fword (count);
}
/* Move to the end of the ?next? word. */
rl_vi_end_word (count, key)
int count, key;
{
if (count < 0)
{
ding ();
return;
}
if (uppercase_p (key))
rl_vi_eWord (count);
else
rl_vi_eword (count);
}
/* Move forward a word the way that 'W' does. */
/* Move forward a word the way that 'W' does. */
rl_vi_fWord (count)
int count;
{
while (count-- && rl_point < (rl_end - 1))
{
/* Skip until whitespace. */
while (!whitespace (the_line[rl_point]) && rl_point < rl_end)
rl_point++;
/* Now skip whitespace. */
while (whitespace (the_line[rl_point]) && rl_point < rl_end)
rl_point++;
}
}
rl_vi_bWord (count)
int count;
{
while (count-- && rl_point > 0)
{
/* If we are at the start of a word, move back to whitespace so
we will go back to the start of the previous word. */
if (!whitespace (the_line[rl_point]) &&
whitespace (the_line[rl_point - 1]))
rl_point--;
while (rl_point > 0 && whitespace (the_line[rl_point]))
rl_point--;
if (rl_point > 0)
{
while (--rl_point >= 0 && !whitespace (the_line[rl_point]));
rl_point++;
}
}
}
rl_vi_eWord (count)
int count;
{
while (count-- && rl_point < (rl_end - 1))
{
/* Move to white space. */
while (++rl_point < rl_end && whitespace (the_line[rl_point]))
;
if (rl_point && rl_point < rl_end)
{
/* Skip whitespace. */
while (rl_point < rl_end && whitespace (the_line[rl_point]))
rl_point++;
/* Skip until whitespace. */
while (rl_point < rl_end && !whitespace (the_line[rl_point]))
rl_point++;
/* Move back to the last character of the word. */
rl_point--;
}
}
}
rl_vi_fword (count)
int count;
{
while (count-- && rl_point < (rl_end - 1))
{
/* Move to white space (really non-identifer). */
if (isident (the_line[rl_point]))
{
while (isident (the_line[rl_point]) && rl_point < rl_end)
rl_point++;
}
else /* if (!whitespace (the_line[rl_point])) */
{
while (!isident (the_line[rl_point]) &&
!whitespace (the_line[rl_point]) && rl_point < rl_end)
rl_point++;
}
/* Move past whitespace. */
while (whitespace (the_line[rl_point]) && rl_point < rl_end)
rl_point++;
}
}
rl_vi_bword (count)
int count;
{
while (count-- && rl_point > 0)
{
int last_is_ident;
/* If we are at the start of a word, move back to a non-identifier
so we will go back to the start of the previous word. */
if (isident (the_line[rl_point]) && !isident (the_line[rl_point - 1]))
rl_point--;
/* If this character and the previous character are `opposite', move
back so we don't get messed up by the rl_point++ down there in
the while loop. Without this code, words like `l;' screw up the
function. */
last_is_ident = isident (the_line[rl_point - 1]);
if ((isident (the_line[rl_point]) && !last_is_ident) ||
(!isident (the_line[rl_point]) && last_is_ident))
rl_point--;
while (rl_point > 0 && whitespace (the_line[rl_point]))
rl_point--;
if (rl_point > 0)
{
if (isident (the_line[rl_point]))
while (--rl_point >= 0 && isident (the_line[rl_point]));
else
while (--rl_point >= 0 && !isident (the_line[rl_point]) &&
!whitespace (the_line[rl_point]));
rl_point++;
}
}
}
rl_vi_eword (count)
int count;
{
while (count-- && rl_point < rl_end - 1)
{
while (++rl_point < rl_end && whitespace (the_line[rl_point]))
;
if (rl_point < rl_end)
{
if (isident (the_line[rl_point]))
while (++rl_point < rl_end && isident (the_line[rl_point]));
else
while (++rl_point < rl_end && !isident (the_line[rl_point])
&& !whitespace (the_line[rl_point]));
rl_point--;
}
}
}
rl_vi_insert_beg ()
{
rl_beg_of_line ();
rl_vi_insertion_mode ();
return 0;
}
rl_vi_append_mode ()
{
if (rl_point < rl_end)
rl_point += 1;
rl_vi_insertion_mode ();
return 0;
}
rl_vi_append_eol ()
{
rl_end_of_line ();
rl_vi_append_mode ();
return 0;
}
/* What to do in the case of C-d. */
rl_vi_eof_maybe (count, c)
int count, c;
{
rl_newline (1, '\n');
}
/* Insertion mode stuff. */
/* Switching from one mode to the other really just involves
switching keymaps. */
rl_vi_insertion_mode ()
{
keymap = vi_insertion_keymap;
}
rl_vi_movement_mode ()
{
if (rl_point > 0)
rl_backward (1);
keymap = vi_movement_keymap;
vi_done_inserting ();
}
vi_done_inserting ()
{
if (vi_doing_insert)
{
rl_end_undo_group ();
vi_doing_insert = 0;
}
}
rl_vi_arg_digit (count, c)
int count, c;
{
if (c == '0' && rl_numeric_arg == 1 && !rl_explicit_arg)
rl_beg_of_line ();
else
rl_digit_argument (count, c);
}
/* Doesn't take an arg count in vi */
rl_vi_change_case (ignore1, ignore2)
int ignore1, ignore2;
{
char c = 0;
/* Don't try this on an empty line. */
if (rl_point >= rl_end - 1)
return;
if (uppercase_p (the_line[rl_point]))
c = to_lower (the_line[rl_point]);
else if (lowercase_p (the_line[rl_point]))
c = to_upper (the_line[rl_point]);
/* Vi is kind of strange here. */
if (c)
{
rl_begin_undo_group ();
rl_delete (1, c);
rl_insert (1, c);
rl_end_undo_group ();
rl_vi_check ();
}
else
rl_forward (1);
}
rl_vi_put (count, key)
int count, key;
{
if (!uppercase_p (key) && (rl_point + 1 <= rl_end))
rl_forward (1);
rl_yank ();
rl_backward (1);
}
rl_vi_check ()
{
if (rl_point && rl_point == rl_end)
rl_point--;
}
rl_vi_column (count)
{
if (count > rl_end)
rl_end_of_line ();
else
rl_point = count - 1;
}
int
rl_vi_domove (key, nextkey)
int key, *nextkey;
{
int c, save;
rl_mark = rl_point;
c = rl_read_key ();
*nextkey = c;
if (!member (c, vi_motion))
{
if (digit (c))
{
save = rl_numeric_arg;
rl_digit_loop1 ();
rl_numeric_arg *= save;
}
else if ((key == 'd' && c == 'd') ||
(key == 'c' && c == 'c'))
{
rl_mark = rl_end;
rl_beg_of_line ();
return (0);
}
else
return (-1);
}
rl_dispatch (c, keymap);
/* No change in position means the command failed. */
if (rl_mark == rl_point)
return (-1);
if ((c == 'w' || c == 'W') && rl_point < rl_end)
rl_point--;
if (rl_mark < rl_point)
exchange (rl_point, rl_mark);
return (0);
}
/* A simplified loop for vi. Don't dispatch key at end.
Don't recognize minus sign? */
rl_digit_loop1 ()
{
int key, c;
while (1)
{
rl_message ("(arg: %d) ", arg_sign * rl_numeric_arg, 0);
key = c = rl_read_key ();
if (keymap[c].type == ISFUNC &&
keymap[c].function == rl_universal_argument)
{
rl_numeric_arg *= 4;
continue;
}
c = UNMETA (c);
if (numeric (c))
{
if (rl_explicit_arg)
rl_numeric_arg = (rl_numeric_arg * 10) + (c - '0');
else
rl_numeric_arg = (c - '0');
rl_explicit_arg = 1;
}
else
{
rl_clear_message ();
rl_stuff_char (key);
break;
}
}
}
rl_vi_delete_to (count, key)
int count, key;
{
int c;
if (uppercase_p (key))
rl_stuff_char ('$');
if (rl_vi_domove (key, &c))
{
ding ();
return;
}
if ((c != '|') && (c != 'h') && rl_mark < rl_end)
rl_mark++;
rl_kill_text (rl_point, rl_mark);
}
rl_vi_change_to (count, key)
int count, key;
{
int c;
if (uppercase_p (key))
rl_stuff_char ('$');
if (rl_vi_domove (key, &c))
{
ding ();
return;
}
if ((c != '|') && (c != 'h') && rl_mark < rl_end)
rl_mark++;
rl_begin_undo_group ();
vi_doing_insert = 1;
rl_kill_text (rl_point, rl_mark);
rl_vi_insertion_mode ();
}
rl_vi_yank_to (count, key)
int count, key;
{
int c, save = rl_point;
if (uppercase_p (key))
rl_stuff_char ('$');
if (rl_vi_domove (key, &c))
{
ding ();
return;
}
rl_begin_undo_group ();
rl_kill_text (rl_point, rl_mark);
rl_end_undo_group ();
rl_do_undo ();
rl_point = save;
}
rl_vi_delete (count)
{
int end;
if (rl_end == 0)
{
ding ();
return;
}
end = rl_point + count;
if (end >= rl_end)
end = rl_end;
rl_kill_text (rl_point, end);
if (rl_point > 0 && rl_point == rl_end)
rl_backward (1);
}
/* Turn the current line into a comment in shell history.
A K*rn shell style function. */
rl_vi_comment ()
{
rl_beg_of_line ();
rl_insert_text (": "); /* `#' doesn't work in interactive mode */
rl_redisplay ();
rl_newline (1, '\010');
}
rl_vi_first_print ()
{
rl_back_to_indent ();
}
rl_back_to_indent (ignore1, ignore2)
int ignore1, ignore2;
{
rl_beg_of_line ();
while (rl_point < rl_end && whitespace (the_line[rl_point]))
rl_point++;
}
/* NOTE: it is necessary that opposite directions are inverses */
#define FTO 1 /* forward to */
#define BTO -1 /* backward to */
#define FFIND 2 /* forward find */
#define BFIND -2 /* backward find */
rl_vi_char_search (count, key)
int count, key;
{
static char target;
static int orig_dir, dir;
int pos;
if (key == ';' || key == ',')
dir = (key == ';' ? orig_dir : -orig_dir);
else
{
target = rl_getc (in_stream);
switch (key)
{
case 't':
orig_dir = dir = FTO;
break;
case 'T':
orig_dir = dir = BTO;
break;
case 'f':
orig_dir = dir = FFIND;
break;
case 'F':
orig_dir = dir = BFIND;
break;
}
}
pos = rl_point;
if (dir < 0)
{
pos--;
do
{
if (the_line[pos] == target)
{
if (dir == BTO)
rl_point = pos + 1;
else
rl_point = pos;
return;
}
}
while (pos--);
if (pos < 0)
{
ding ();
return;
}
}
else
{ /* dir > 0 */
pos++;
do
{
if (the_line[pos] == target)
{
if (dir == FTO)
rl_point = pos - 1;
else
rl_point = pos;
return;
}
}
while (++pos < rl_end);
if (pos >= (rl_end - 1))
ding ();
}
}
/* Match brackets */
rl_vi_match ()
{
int count = 1, brack, pos;
pos = rl_point;
if ((brack = rl_vi_bracktype (the_line[rl_point])) == 0)
{
while ((brack = rl_vi_bracktype (the_line[rl_point])) == 0 &&
rl_point < rl_end - 1)
rl_forward (1);
if (brack <= 0)
{
rl_point = pos;
ding ();
return;
}
}
pos = rl_point;
if (brack < 0)
{
while (count)
{
if (--pos >= 0)
{
int b = rl_vi_bracktype (the_line[pos]);
if (b == -brack)
count--;
else if (b == brack)
count++;
}
else
{
ding ();
return;
}
}
}
else
{ /* brack > 0 */
while (count)
{
if (++pos < rl_end)
{
int b = rl_vi_bracktype (the_line[pos]);
if (b == -brack)
count--;
else if (b == brack)
count++;
}
else
{
ding ();
return;
}
}
}
rl_point = pos;
}
int
rl_vi_bracktype (c)
int c;
{
switch (c)
{
case '(': return 1;
case ')': return -1;
case '[': return 2;
case ']': return -2;
case '{': return 3;
case '}': return -3;
default: return 0;
}
}
rl_vi_change_char ()
{
int c;
c = rl_getc (in_stream);
switch (c)
{
case '\033':
case CTRL('C'):
return;
default:
rl_begin_undo_group ();
rl_delete (1, c);
rl_insert (1, c);
rl_end_undo_group ();
break;
}
}
rl_vi_subst (count, key)
int count, key;
{
rl_begin_undo_group ();
vi_doing_insert = 1;
if (uppercase_p (key))
{
rl_beg_of_line ();
rl_kill_line (1);
}
else
rl_delete (count, key);
rl_vi_insertion_mode ();
}
rl_vi_overstrike (count, key)
int count, key;
{
int i;
if (vi_doing_insert == 0)
{
vi_doing_insert = 1;
rl_begin_undo_group ();
}
for (i = 0; i < count; i++)
{
vi_replace_count++;
rl_begin_undo_group ();
if (rl_point < rl_end)
{
rl_delete (1, key);
rl_insert (1, key);
}
else
rl_insert (1, key);
rl_end_undo_group ();
}
}
rl_vi_overstrike_delete (count)
int count;
{
int i, s;
for (i = 0; i < count; i++)
{
if (vi_replace_count == 0)
{
ding ();
break;
}
s = rl_point;
if (rl_do_undo ())
vi_replace_count--;
if (rl_point == s)
rl_backward (1);
}
if (vi_replace_count == 0 && vi_doing_insert)
{
rl_end_undo_group ();
rl_do_undo ();
vi_doing_insert = 0;
}
}
rl_vi_replace ()
{
int i;
vi_replace_count = 0;
vi_replace_map = rl_make_bare_keymap ();
for (i = ' '; i < 127; i++)
vi_replace_map[i].function = rl_vi_overstrike;
vi_replace_map[RUBOUT].function = rl_vi_overstrike_delete;
vi_replace_map[ESC].function = rl_vi_movement_mode;
vi_replace_map[RETURN].function = rl_newline;
vi_replace_map[NEWLINE].function = rl_newline;
keymap = vi_replace_map;
}
/*
* Try to complete the word we are standing on or the word that ends with
* the previous character. A space matches everything.
* Word delimiters are space and ;.
*/
rl_vi_possible_completions()
{
int save_pos = rl_point;
if (!index (" ;", the_line[rl_point]))
{
while (!index(" ;", the_line[++rl_point]))
;
}
else if (the_line[rl_point-1] == ';')
{
ding ();
return (0);
}
rl_possible_completions ();
rl_point = save_pos;
return (0);
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.