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0000025: vi-editing mode for ash
This commit is contained in:
Paul Fox 2005-08-04 19:04:46 +00:00
parent 8eeb655661
commit 3f11b1bf63
5 changed files with 390 additions and 34 deletions
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2
AUTHORS
View File

@ -157,3 +157,5 @@ Tito Ragusa <farmatito@tiscali.it>
devfsd and size optimizations in strings, openvt, chvt, deallocvt, hdparm,
fdformat, lsattr, chattr, id and eject.
Paul Fox <pgf@foxharp.boston.ma.us>
vi editing mode for ash, various other patches/fixes

8
shell/Config.in
View File

@ -201,6 +201,14 @@ config CONFIG_FEATURE_COMMAND_EDITING
help
Enable command editing in shell.
config CONFIG_FEATURE_COMMAND_EDITING_VI
bool "vi-style line editing commands"
default n
depends on CONFIG_FEATURE_COMMAND_EDITING
help
Enable vi-style line editing in the shell. This mode can be
turned on and off with "set -o vi" and "set +o vi".
config CONFIG_FEATURE_COMMAND_HISTORY
int "history size"
default 15

17
shell/ash.c
View File

@ -1949,19 +1949,21 @@ struct shparam {
#define bflag optlist[11]
#define uflag optlist[12]
#define qflag optlist[13]
#define viflag optlist[14]
#ifdef DEBUG
#define nolog optlist[14]
#define debug optlist[15]
#define NOPTS 16
#else
#define NOPTS 14
#define nolog optlist[15]
#define debug optlist[16]
#endif
#ifndef CONFIG_FEATURE_COMMAND_EDITING_VI
#define setvimode(on) viflag = 0 /* forcibly keep the option off */
#endif
/* $NetBSD: options.c,v 1.33 2003/01/22 20:36:04 dsl Exp $ */
static const char *const optletters_optnames[NOPTS] = {
static const char *const optletters_optnames[] = {
"e" "errexit",
"f" "noglob",
"I" "ignoreeof",
@ -1976,6 +1978,7 @@ static const char *const optletters_optnames[NOPTS] = {
"b" "notify",
"u" "nounset",
"q" "quietprofile",
"\0" "vi",
#ifdef DEBUG
"\0" "nolog",
"\0" "debug",
@ -1985,6 +1988,7 @@ static const char *const optletters_optnames[NOPTS] = {
#define optletters(n) optletters_optnames[(n)][0]
#define optnames(n) (&optletters_optnames[(n)][1])
#define NOPTS (sizeof(optletters_optnames)/sizeof(optletters_optnames[0]))
static char optlist[NOPTS];
@ -8862,6 +8866,7 @@ optschanged(void)
#endif
setinteractive(iflag);
setjobctl(mflag);
setvimode(viflag);
}
static inline void

387
shell/cmdedit.c
View File

@ -441,27 +441,61 @@ static void redraw(int y, int back_cursor)
input_backward(back_cursor);
}
/* Delete the char in front of the cursor */
static void input_delete(void)
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
static char delbuf[BUFSIZ]; /* a place to store deleted characters */
static char *delp = delbuf;
static int newdelflag; /* whether delbuf should be reused yet */
#endif
/* Delete the char in front of the cursor, optionally saving it
* for later putback */
static void input_delete(int save)
{
int j = cursor;
if (j == len)
return;
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
if (save) {
if (newdelflag) {
delp = delbuf;
newdelflag = 0;
}
if (delp - delbuf < BUFSIZ)
*delp++ = command_ps[j];
}
#endif
strcpy(command_ps + j, command_ps + j + 1);
len--;
input_end(); /* rewtite new line */
input_end(); /* rewrite new line */
cmdedit_set_out_char(0); /* destroy end char */
input_backward(cursor - j); /* back to old pos cursor */
}
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
static void put(void)
{
int ocursor, j = delp - delbuf;
if (j == 0)
return;
ocursor = cursor;
/* open hole and then fill it */
memmove(command_ps + cursor + j, command_ps + cursor, len - cursor + 1);
strncpy(command_ps + cursor, delbuf, j);
len += j;
input_end(); /* rewrite new line */
input_backward(cursor-ocursor-j+1); /* at end of new text */
}
#endif
/* Delete the char in back of the cursor */
static void input_backspace(void)
{
if (cursor > 0) {
input_backward(1);
input_delete();
input_delete(0);
}
}
@ -473,7 +507,6 @@ static void input_forward(void)
cmdedit_set_out_char(command_ps[cursor + 1]);
}
static void cmdedit_setwidth(int w, int redraw_flg)
{
cmdedit_termw = cmdedit_prmt_len + 2;
@ -1217,18 +1250,147 @@ enum {
* ESC-h -- Delete forward one word
* CTL-t -- Transpose two characters
*
* Furthermore, the "vi" command editing keys are not implemented.
* Minimalist vi-style command line editing available if configured.
* vi mode implemented 2005 by Paul Fox <pgf@foxharp.boston.ma.us>
*
*/
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
static int vi_mode;
void setvimode ( int viflag )
{
vi_mode = viflag;
}
void
vi_Word_motion(char *command, int eat)
{
while (cursor < len && !isspace(command[cursor]))
input_forward();
if (eat) while (cursor < len && isspace(command[cursor]))
input_forward();
}
void
vi_word_motion(char *command, int eat)
{
if (isalnum(command[cursor]) || command[cursor] == '_') {
while (cursor < len &&
(isalnum(command[cursor+1]) ||
command[cursor+1] == '_'))
input_forward();
} else if (ispunct(command[cursor])) {
while (cursor < len &&
(ispunct(command[cursor+1])))
input_forward();
}
if (cursor < len)
input_forward();
if (eat && cursor < len && isspace(command[cursor]))
while (cursor < len && isspace(command[cursor]))
input_forward();
}
void
vi_End_motion(char *command)
{
input_forward();
while (cursor < len && isspace(command[cursor]))
input_forward();
while (cursor < len-1 && !isspace(command[cursor+1]))
input_forward();
}
void
vi_end_motion(char *command)
{
if (cursor >= len-1)
return;
input_forward();
while (cursor < len-1 && isspace(command[cursor]))
input_forward();
if (cursor >= len-1)
return;
if (isalnum(command[cursor]) || command[cursor] == '_') {
while (cursor < len-1 &&
(isalnum(command[cursor+1]) ||
command[cursor+1] == '_'))
input_forward();
} else if (ispunct(command[cursor])) {
while (cursor < len-1 &&
(ispunct(command[cursor+1])))
input_forward();
}
}
void
vi_Back_motion(char *command)
{
while (cursor > 0 && isspace(command[cursor-1]))
input_backward(1);
while (cursor > 0 && !isspace(command[cursor-1]))
input_backward(1);
}
void
vi_back_motion(char *command)
{
if (cursor <= 0)
return;
input_backward(1);
while (cursor > 0 && isspace(command[cursor]))
input_backward(1);
if (cursor <= 0)
return;
if (isalnum(command[cursor]) || command[cursor] == '_') {
while (cursor > 0 &&
(isalnum(command[cursor-1]) ||
command[cursor-1] == '_'))
input_backward(1);
} else if (ispunct(command[cursor])) {
while (cursor > 0 &&
(ispunct(command[cursor-1])))
input_backward(1);
}
}
#endif
/*
* the normal emacs mode and vi's insert mode are the same.
* commands entered when in vi command mode ("escape mode") get
* an extra bit added to distinguish them. this lets them share
* much of the code in the big switch and while loop. i
* experimented with an ugly macro to make the case labels for
* these cases go away entirely when vi mode isn't configured, in
* hopes of letting the jump tables get smaller:
* #define vcase(caselabel) caselabel
* and then
* case CNTRL('A'):
* case vcase(VICMD('0'):)
* but it didn't seem to make any difference in code size,
* and the macro-ized code was too ugly.
*/
#define VI_cmdbit 0x100
#define VICMD(somecmd) ((somecmd)|VI_cmdbit)
/* convert uppercase ascii to equivalent control char, for readability */
#define CNTRL(uc_char) ((uc_char) - 0x40)
int cmdedit_read_input(char *prompt, char command[BUFSIZ])
{
int break_out = 0;
int lastWasTab = FALSE;
unsigned char c = 0;
unsigned char c;
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
unsigned int ic, prevc;
int vi_cmdmode = 0;
#endif
/* prepare before init handlers */
cmdedit_y = 0; /* quasireal y, not true work if line > xt*yt */
len = 0;
@ -1265,22 +1427,38 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ])
/* if we can't read input then exit */
goto prepare_to_die;
switch (c) {
#ifdef CONFIG_FEATURE_COMMAND_EDITING_VI
newdelflag = 1;
ic = c;
if (vi_cmdmode)
ic |= VI_cmdbit;
switch (ic)
#else
switch (c)
#endif
{
case '\n':
case '\r':
case VICMD('\n'):
case VICMD('\r'):
/* Enter */
goto_new_line();
break_out = 1;
break;
case 1:
case CNTRL('A'):
case VICMD('0'):
/* Control-a -- Beginning of line */
input_backward(cursor);
break;
case 2:
case CNTRL('B'):
case VICMD('h'):
case VICMD('\b'):
case VICMD(DEL):
/* Control-b -- Move back one character */
input_backward(1);
break;
case 3:
case CNTRL('C'):
case VICMD(CNTRL('C')):
/* Control-c -- stop gathering input */
goto_new_line();
#ifndef CONFIG_ASH
@ -1293,7 +1471,7 @@ int cmdedit_read_input(char *prompt, char command[BUFSIZ])
break_out = -1; /* to control traps */
#endif
break;
case 4:
case CNTRL('D'):
/* Control-d -- Delete one character, or exit
* if the len=0 and no chars to delete */
if (len == 0) {
@ -1310,14 +1488,17 @@ prepare_to_die:
break;
#endif
} else {
input_delete();
input_delete(0);
}
break;
case 5:
case CNTRL('E'):
case VICMD('$'):
/* Control-e -- End of line */
input_end();
break;
case 6:
case CNTRL('F'):
case VICMD('l'):
case VICMD(' '):
/* Control-f -- Move forward one character */
input_forward();
break;
@ -1331,24 +1512,29 @@ prepare_to_die:
input_tab(&lastWasTab);
#endif
break;
case 11:
case CNTRL('K'):
/* Control-k -- clear to end of line */
*(command + cursor) = 0;
len = cursor;
printf("\033[J");
break;
case 12:
case CNTRL('L'):
case VICMD(CNTRL('L')):
/* Control-l -- clear screen */
printf("\033[H");
redraw(0, len-cursor);
break;
#if MAX_HISTORY >= 1
case 14:
case CNTRL('N'):
case VICMD(CNTRL('N')):
case VICMD('j'):
/* Control-n -- Get next command in history */
if (get_next_history())
goto rewrite_line;
break;
case 16:
case CNTRL('P'):
case VICMD(CNTRL('P')):
case VICMD('k'):
/* Control-p -- Get previous command from history */
if (cur_history > 0) {
get_previous_history();
@ -1358,26 +1544,167 @@ prepare_to_die:
}
break;
#endif
case 21:
case CNTRL('U'):
case VICMD(CNTRL('U')):
/* Control-U -- Clear line before cursor */
if (cursor) {
strcpy(command, command + cursor);
redraw(cmdedit_y, len -= cursor);
}
break;
case 23:
case CNTRL('W'):
case VICMD(CNTRL('W')):
/* Control-W -- Remove the last word */
while (cursor > 0 && isspace(command[cursor-1]))
input_backspace();
while (cursor > 0 &&!isspace(command[cursor-1]))
input_backspace();
break;
#if CONFIG_FEATURE_COMMAND_EDITING_VI
case VICMD('i'):
vi_cmdmode = 0;
break;
case VICMD('I'):
input_backward(cursor);
vi_cmdmode = 0;
break;
case VICMD('a'):
input_forward();
vi_cmdmode = 0;
break;
case VICMD('A'):
input_end();
vi_cmdmode = 0;
break;
case VICMD('x'):
input_delete(1);
break;
case VICMD('X'):
if (cursor > 0) {
input_backward(1);
input_delete(1);
}
break;
case VICMD('W'):
vi_Word_motion(command, 1);
break;
case VICMD('w'):
vi_word_motion(command, 1);
break;
case VICMD('E'):
vi_End_motion(command);
break;
case VICMD('e'):
vi_end_motion(command);
break;
case VICMD('B'):
vi_Back_motion(command);
break;
case VICMD('b'):
vi_back_motion(command);
break;
case VICMD('C'):
vi_cmdmode = 0;
/* fall through */
case VICMD('D'):
goto clear_to_eol;
case VICMD('c'):
vi_cmdmode = 0;
/* fall through */
case VICMD('d'):
{
int nc, sc;
sc = cursor;
prevc = ic;
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
if (c == (prevc & 0xff)) {
/* "cc", "dd" */
input_backward(cursor);
goto clear_to_eol;
break;
}
switch(c) {
case 'w':
case 'W':
case 'e':
case 'E':
switch (c) {
case 'w': /* "dw", "cw" */
vi_word_motion(command, vi_cmdmode);
break;
case 'W': /* 'dW', 'cW' */
vi_Word_motion(command, vi_cmdmode);
break;
case 'e': /* 'de', 'ce' */
vi_end_motion(command);
input_forward();
break;
case 'E': /* 'dE', 'cE' */
vi_End_motion(command);
input_forward();
break;
}
nc = cursor;
input_backward(cursor - sc);
while (nc-- > cursor)
input_delete(1);
break;
case 'b': /* "db", "cb" */
case 'B': /* implemented as B */
if (c == 'b')
vi_back_motion(command);
else
vi_Back_motion(command);
while (sc-- > cursor)
input_delete(1);
break;
case ' ': /* "d ", "c " */
input_delete(1);
break;
case '$': /* "d$", "c$" */
clear_to_eol:
while (cursor < len)
input_delete(1);
break;
}
}
break;
case VICMD('p'):
input_forward();
/* fallthrough */
case VICMD('P'):
put();
break;
case VICMD('r'):
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
if (c == 0)
beep();
else {
*(command + cursor) = c;
putchar(c);
putchar('\b');
}
break;
#endif /* CONFIG_FEATURE_COMMAND_EDITING_VI */
case ESC:{
#if CONFIG_FEATURE_COMMAND_EDITING_VI
if (vi_mode) {
/* ESC: insert mode --> command mode */
vi_cmdmode = 1;
input_backward(1);
break;
}
#endif
/* escape sequence follows */
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
/* different vt100 emulations */
if (c == '[' || c == 'O') {
case VICMD('['):
case VICMD('O'):
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
}
@ -1414,8 +1741,12 @@ prepare_to_die:
rewrite_line:
/* change command */
len = strlen(strcpy(command, history[cur_history]));
/* redraw and go to end line */
/* redraw and go to eol (bol, in vi */
#if CONFIG_FEATURE_COMMAND_EDITING_VI
redraw(cmdedit_y, vi_mode ? 9999:0);
#else
redraw(cmdedit_y, 0);
#endif
break;
#endif
case 'C':
@ -1428,7 +1759,7 @@ rewrite_line:
break;
case '3':
/* Delete */
input_delete();
input_delete(0);
break;
case '1':
case 'H':
@ -1450,7 +1781,7 @@ rewrite_line:
default: /* If it's regular input, do the normal thing */
#ifdef CONFIG_FEATURE_NONPRINTABLE_INVERSE_PUT
/* Control-V -- Add non-printable symbol */
if (c == 22) {
if (c == CNTRL('V')) {
if (safe_read(0, &c, 1) < 1)
goto prepare_to_die;
if (c == 0) {
@ -1458,9 +1789,15 @@ rewrite_line:
break;
}
} else
#endif
{
#if CONFIG_FEATURE_COMMAND_EDITING_VI
if (vi_cmdmode) /* don't self-insert */
break;
#endif
if (!Isprint(c)) /* Skip non-printable characters */
break;
}
if (len >= (BUFSIZ - 2)) /* Need to leave space for enter */
break;

4
shell/cmdedit.h
View File

@ -12,4 +12,8 @@ void load_history ( const char *fromfile );
void save_history ( const char *tofile );
#endif
#if CONFIG_FEATURE_COMMAND_EDITING_VI
void setvimode ( int viflag );
#endif
#endif /* CMDEDIT_H */