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vi.c
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/* SC A Spreadsheet Calculator
*
* One line vi emulation
* $Revision: 7.13 $
*/
#include <sys/types.h>
#ifdef BSD42
#include <strings.h>
#else
#ifndef SYSIII
#include <string.h>
#endif
#endif
#include <signal.h>
#include <curses.h>
#include <ctype.h>
#include "sc.h"
#define istext(a) (isalnum(a) || ((a) == '_'))
static void append_line();
static void back_hist();
static int back_line(int arg);
static int back_word(int arg);
static void back_space();
static void col_0();
static void cr_line();
static void del_in_line(int arg, int back_null);
static void del_to_end();
static void dogoto();
static void dotab();
static void dotcmd();
static int find_char(int arg, int n);
static void for_hist();
static int for_line(int arg, int stop_null);
static int for_word(int arg, int end_word, int stop_null);
static void last_col();
static void change_case(int arg);
static void rep_char();
static void replace_in_line(int c);
static void replace_mode();
static void restore_it();
static void savedot(int c);
static void save_hist();
static void search_again();
static void search_hist();
static void search_mode();
static void stop_edit();
static int to_char(int arg, int n);
static void u_save(int c);
static void yank_cmd(int delete, int change);
static void yank_chars(register int first, register int last, int delete);
extern int framerows; /* Rows in current frame */
extern char mode_ind; /* Mode indicator */
extern int lcols; /* Spreadsheet Column the cursor was in last */
char *completethis = NULL;
/* values for mode below */
#define INSERT_MODE 0 /* Insert mode */
#define EDIT_MODE 1 /* Edit mode */
#define REP_MODE 2 /* Replace mode */
#define SEARCH_MODE 3 /* Get arguments for '/' command */
#define NAVIGATE_MODE 4 /* Navigate the spreadsheet while editing
a line */
#define DOTLEN 200
static int mode = INSERT_MODE;
struct hist {
unsigned int len;
char *histline;
} history[HISTLEN + 1];
static int histp = 0;
static int lasthist = 0;
static int endhist = -1;
static char *last_search = NULL;
static char *undo_line = NULL;
static int undo_lim;
static char dotb[DOTLEN];
static int doti = 0;
static int do_dot = 0;
static char putbuf[FBUFLEN];
static int findfunc = '0';
static int findchar = 1;
static int finddir = 0;
void
write_line(int c)
{
struct frange *fr;
struct crange *cr;
if (c != ctl('i')) completethis = NULL;
if (mode == EDIT_MODE) {
switch (c) {
case KEY_BACKSPACE:
case (ctl('h')): linelim = back_line(arg); break;
case (ctl('i')): dotab(); break;
case (ctl('m')): cr_line(); break;
case 'v':
case (ctl('v')): toggle_navigate_mode(); break;
case ESC: stop_edit(); break;
case '+': for_hist(); break;
case '-': back_hist(); break;
case KEY_END:
case (ctl('e')):
case '$': last_col(); break;
case '.': dotcmd(); break;
case ';': if (findfunc)
ungetch(findchar);
else
break;
findchar = 0;
if (findfunc == 'f')
linelim = find_char(arg, finddir);
else
linelim = to_char(arg, finddir);
break;
case ',': if (findfunc)
ungetch(findchar);
else
break;
findchar = 0;
if (findfunc == 'f')
linelim = find_char(arg, -(finddir));
else
linelim = to_char(arg, -(finddir));
break;
case '~': u_save(c); change_case(arg); break;
#ifdef KEY_FIND
case KEY_FIND:
#endif
case '/': search_mode(); break;
#ifdef KEY_HOME
case KEY_HOME:
#endif
case (ctl('a')):
case '0': col_0(); break;
case 'A': u_save(c); last_col(); append_line(); break;
case 'C': u_save(c); del_to_end(); append_line(); break;
case 'D': u_save(c); del_to_end(); break;
case 'F': linelim = find_char(arg, -1); break;
case 'G': if (histp > 0) histp = lasthist; for_hist(); break;
case 'I': u_save(c); col_0(); insert_mode(); break;
case 'P': u_save(c);
ins_string(putbuf);
linelim = back_line(1); break;
case 'R': u_save(c); replace_mode(); break;
case 'T': linelim = to_char(arg, -1); break;
case 'X': u_save(c); back_space(); break;
case 'Y': yank_chars(linelim, strlen(line), 0); break;
case 'a': u_save(c); append_line(); break;
case 'b': linelim = back_word(arg); break;
case 'c': u_save(c); yank_cmd(1, 1); insert_mode(); break;
case 'd': u_save(c); yank_cmd(1, 0); break;
case 'e': linelim = for_word(arg, 1, 0); break;
case 'f': linelim = find_char(arg, 1); break;
case KEY_LEFT:
case (ctl('b')):
case 'h': linelim = back_line(arg); break;
case KEY_IC:
case 'i': u_save(c); insert_mode(); break;
case KEY_DOWN:
case 'j': for_hist(); break;
case KEY_UP:
case 'k': back_hist(); break;
case KEY_RIGHT:
case (ctl('f')):
case ' ':
case 'l': linelim = for_line(arg, 0); break;
case 'n': search_again(); break;
case 'p': u_save(c);
linelim = for_line(1, 1);
ins_string(putbuf);
linelim = back_line(1); break;
case 'q': stop_edit(); break;
case 'r': u_save(c); rep_char(); break;
case 's': u_save(c); del_in_line(arg, 0); insert_mode(); break;
case 't': linelim = to_char(arg, 1); break;
case 'u': restore_it(); break;
case 'w': linelim = for_word(arg, 0, 0); break;
case KEY_DC:
case 'x': u_save(c); del_in_line(arg, 1); break;
case 'y': yank_cmd(0, 0); break;
default: break;
}
} else if (mode == INSERT_MODE) {
if (c == (ctl('m')))
savedot(ESC);
else
savedot(c);
switch (c) {
case KEY_BACKSPACE:
case (ctl('h')): back_space(); break;
case (ctl('i')): dotab(); break;
case (ctl('m')): cr_line(); break;
case (ctl('v')): toggle_navigate_mode(); break;
case KEY_LEFT:
case (ctl('b')): linelim = back_line(arg); break;
case KEY_RIGHT:
case (ctl('f')): linelim = for_line(arg, 1); break;
case KEY_DOWN:
case (ctl('n')): for_hist(); break;
case KEY_UP:
case (ctl('p')): back_hist(); break;
case KEY_HOME:
case (ctl('a')): col_0(); break;
case KEY_END:
case (ctl('e')): last_col(); break;
case ESC: edit_mode(); break;
default: ins_in_line(c); break;
}
} else if (mode == SEARCH_MODE) {
switch (c) {
case KEY_BACKSPACE:
case (ctl('h')): back_space(); break;
case (ctl('m')): search_hist(); break;
case ESC: edit_mode(); break;
default: ins_in_line(c); break;
}
} else if (mode == REP_MODE) {
savedot(c);
switch (c) {
case KEY_BACKSPACE:
case (ctl('h')): if (linelim > strlen(undo_line))
back_space();
else {
linelim = back_line(1);
*(line+linelim) = *(undo_line+linelim);
} break;
case (ctl('m')): cr_line(); break;
case ESC: edit_mode(); break;
default: replace_in_line(c); break;
}
} else if (mode == NAVIGATE_MODE) {
switch (c) {
case '.':
case ':':
case (ctl('i')): if (!showrange) {
toggle_navigate_mode();
startshow();
} else {
showdr();
ins_in_line(' ');
} break;
case '+':
case '-': if (!showrange) {
ins_string(v_name(currow, curcol));
ins_in_line(c);
} break;
case (ctl('m')): if (!showrange) {
ins_string(v_name(currow, curcol));
toggle_navigate_mode();
} else {
toggle_navigate_mode();
cr_line();
} break;
case (ctl('a')): { /* insert variable value */
struct ent *p = *ATBL(tbl, currow, curcol);
char temp[100];
if (p && p->flags & is_valid) {
(void) sprintf(temp, "%.*f",
precision[curcol], p->v);
ins_string(temp);
}
} break;
case 'v':
case (ctl('v')): ins_string(v_name(currow, curcol));
toggle_navigate_mode(); break;
case 'c': if ((cr = find_crange(currow, curcol))) {
ins_string(r_name(cr->r_left->row,
cr->r_left->col,
cr->r_right->row,
cr->r_right->col));
toggle_navigate_mode();
ins_in_line(' ');
showrange = 0;
} break;
case 'f': if ((fr = find_frange(currow, curcol))) {
ins_string(r_name(fr->or_left->row,
fr->or_left->col,
fr->or_right->row,
fr->or_right->col));
toggle_navigate_mode();
ins_in_line(' ');
showrange = 0;
} break;
case 'r': if ((fr = find_frange(currow, curcol))) {
ins_string(r_name(fr->ir_left->row,
fr->ir_left->col,
fr->ir_right->row,
fr->ir_right->col));
toggle_navigate_mode();
ins_in_line(' ');
showrange = 0;
} break;
case KEY_LEFT:
case 'h': backcol(arg); break;
case KEY_RIGHT:
case ' ':
case 'l': forwcol(arg); break;
case KEY_DOWN:
case (ctl('n')):
case 'j': forwrow(arg); break;
case KEY_UP:
case (ctl('p')):
case 'k': backrow(arg); break;
case 'q':
case ctl('g'):
case ESC: toggle_navigate_mode();
showrange = 0; break;
case 'H': backcol(curcol - stcol + 2);
break;
case KEY_NPAGE: /* next page */
case (ctl('f')):
case 'J':
{
int ps;
ps = pagesize ? pagesize :
(LINES - RESROW - framerows)/2;
forwrow(arg * ps);
strow = strow + (arg * ps);
FullUpdate++;
}
break;
case KEY_PPAGE: /* previous page */
case (ctl('b')):
case 'K':
{
int ps;
ps = pagesize ? pagesize :
(LINES - RESROW - framerows)/2;
backrow(arg * ps);
strow = strow - (arg * ps);
if (strow < 0) strow = 0;
FullUpdate++;
}
break;
case 'L':
forwcol(lcols -(curcol-stcol)+1);
break;
case KEY_HOME:
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
currow = 0;
curcol = 0;
rowsinrange = 1;
colsinrange = fwidth[curcol];
FullUpdate++;
break;
case '0':
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
curcol = 0;
rowsinrange = 1;
colsinrange = fwidth[curcol]; break;
case '$': {
register struct ent *p;
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
curcol = maxcols - 1;
while (!VALID_CELL(p, currow, curcol) &&
curcol > 0)
curcol--;
rowsinrange = 1;
colsinrange = fwidth[curcol];
break;
}
case '^':
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
currow = 0;
rowsinrange = 1;
colsinrange = fwidth[curcol]; break;
case '#': {
register struct ent *p;
/* Remember the current position */
savedrow[0] = currow;
savedcol[0] = curcol;
savedstrow[0] = strow;
savedstcol[0] = stcol;
currow = maxrows - 1;
while (!VALID_CELL(p, currow, curcol) &&
currow > 0)
currow--;
rowsinrange = 1;
colsinrange = fwidth[curcol]; break;
}
case 'm':
markcell(); break;
case '`': case '\'':
dotick(c); break;
case '*':
gotonote(); break;
case 'g':
dogoto(); break;
case 'w': {
register struct ent *p;
while (--arg>=0) {
do {
if (curcol < maxcols - 1)
curcol++;
else {
if (currow < maxrows - 1) {
while(++currow < maxrows - 1 &&
row_hidden[currow])
;
curcol = 0;
} else {
error("At end of table");
break;
}
}
} while(col_hidden[curcol] ||
!VALID_CELL(p, currow, curcol));
}
rowsinrange = 1;
colsinrange = fwidth[curcol];
break;
}
case 'b': {
register struct ent *p;
while (--arg>=0) {
do {
if (curcol)
curcol--;
else {
if (currow) {
while(--currow && row_hidden[currow])
;
curcol = maxcols - 1;
} else {
error("At start of table");
break;
}
}
} while (col_hidden[curcol] ||
!VALID_CELL(p, currow, curcol));
}
rowsinrange = 1;
colsinrange = fwidth[curcol];
break;
}
}
}
}
void
edit_mode()
{
mode = EDIT_MODE;
mode_ind = 'e';
if (linelim < 0) /* -1 says stop editing, ...so we still aren't */
return;
linelim = back_line(1);
}
void
insert_mode()
{
mode_ind = 'i';
mode = INSERT_MODE;
}
static void
search_mode()
{
line[0] = '/';
line[1] = '\0';
linelim = 1;
mode_ind = '/';
mode = SEARCH_MODE;
}
static void
replace_mode()
{
mode_ind = 'R';
mode = REP_MODE;
}
void
toggle_navigate_mode()
{
static char prev_mode = NAVIGATE_MODE;
int limtmp;
switch (prev_mode) {
case INSERT_MODE:
if (mode == NAVIGATE_MODE) {
prev_mode = NAVIGATE_MODE;
insert_mode();
break;
} else
return;
case EDIT_MODE:
if (mode == NAVIGATE_MODE) {
prev_mode = NAVIGATE_MODE;
limtmp = linelim;
edit_mode();
linelim = limtmp;
break;
} else
return;
case NAVIGATE_MODE:
prev_mode = mode;
mode_ind = 'v';
mode = NAVIGATE_MODE;
break;
default:
prev_mode = NAVIGATE_MODE;
break;
}
}
void
dotab()
{
static struct range *firstmatch;
static struct range *lastmatch;
static struct range *nextmatch;
int len;
if (linelim > 1 && isalnum(line[linelim-1]) || line[linelim-1] == '_' ||
(completethis && line[linelim-1] == ' ')) {
if (!completethis) {
for (completethis = line + linelim - 1; isalnum(*completethis) ||
*completethis == '_'; completethis--) /* */;
completethis++;
len = line + linelim - completethis;
if (!find_range(completethis, len, NULL, NULL, &lastmatch)) {
firstmatch = lastmatch;
while (firstmatch->r_next &&
!strncmp(completethis, firstmatch->r_next->r_name, len))
firstmatch = firstmatch->r_next;
nextmatch = firstmatch;
} else
nextmatch = NULL;
}
if (nextmatch) {
len = line + linelim - completethis;
memmove(completethis, line + linelim, strlen(line) - linelim + 1);
linelim -= len;
ins_string(nextmatch->r_name);
if (*(completethis - 1) == ' ' && *(line + linelim) != ' ')
ins_in_line(' ');
if (nextmatch == lastmatch)
nextmatch = firstmatch;
else
nextmatch = nextmatch->r_prev;
}
} else
startshow();
}
/* show the current range (see ^I), we are moving around to define a range */
void
startshow()
{
showrange = 1;
showsr = currow;
showsc = curcol;
toggle_navigate_mode();
}
/* insert the range we defined by moving around the screen, see startshow() */
#define SHOWROWS 2
#define SHOWCOLS 3
void
showdr()
{
int minsr, minsc, maxsr, maxsc;
char *p;
char r[12];
struct frange *fr = find_frange(currow, curcol);
if (showrange == SHOWROWS) {
minsr = showsr < currow ? showsr : currow;
minsc = fr ? fr->or_left->col : 0;
maxsr = showsr > currow ? showsr : currow;
maxsc = fr ? fr->or_right->col : maxcols;
toggle_navigate_mode();
sprintf(r, "%d:%d", minsr, maxsr);
ins_string(r);
} else if (showrange == SHOWCOLS) {
minsr = 0;
minsc = showsc < curcol ? showsc : curcol;
maxsr = maxrows;
maxsc = showsc > curcol ? showsc : curcol;
strcpy(r, coltoa(minsc));
strcat(r, ":");
strcat(r, coltoa(maxsc));
toggle_navigate_mode();
ins_string(r);
} else {
minsr = showsr < currow ? showsr : currow;
minsc = showsc < curcol ? showsc : curcol;
maxsr = showsr > currow ? showsr : currow;
maxsc = showsc > curcol ? showsc : curcol;
toggle_navigate_mode();
ins_string(r_name(minsr, minsc, maxsr, maxsc));
}
showrange = 0;
}
/* dot command functions. Saves info so we can redo on a '.' command */
static void
savedot(int c)
{
if (do_dot || (c == '\n'))
return;
if (doti < DOTLEN-1) {
if (c > 255) {
if (doti < DOTLEN-2) {
dotb[doti++] = c/256;
c %= 256;
} else
return;
}
dotb[doti++] = c;
dotb[doti] = '\0';
}
}
static int dotcalled = 0;
static void
dotcmd()
{
int c;
if (dotcalled) /* stop recursive calling of dotcmd() */
return;
do_dot = 1;
doti = 0;
while (dotb[doti] != '\0') {
if ((c = dotb[doti++]) < 4)
c = c * 256 + dotb[doti++];
dotcalled = 1;
write_line(c);
}
do_dot = 0;
doti = 0;
dotcalled = 0;
}
int
vigetch()
{
int c;
if (do_dot) {
if (dotb[doti] != '\0') {
return (dotb[doti++]);
} else {
do_dot = 0;
doti = 0;
return (nmgetch());
}
}
c = nmgetch();
return (c);
}
/* saves the current line for possible use by an undo cmd */
static void
u_save(int c)
{
static unsigned undolen = 0;
if (strlen(line)+1 > undolen) {
undolen = strlen(line)+40;
undo_line = scxrealloc(undo_line, undolen);
}
(void) strcpy(undo_line, line);
undo_lim = linelim;
/* reset dot command if not processing it. */
if (!do_dot) {
doti = 0;
savedot(c);
}
}
/* Restores the current line saved by u_save() */
static void
restore_it()
{
static char *tempc = NULL;
static unsigned templen = 0;
int tempi;
if ((undo_line == NULL) || (*undo_line == '\0'))
return;
if (strlen(line)+1 > templen) {
templen = strlen(line) + 40;
tempc = scxrealloc(tempc, templen);
}
strcpy(tempc, line);
tempi = linelim;
(void) strcpy(line, undo_line);
linelim = undo_lim;
strcpy(undo_line, tempc);
undo_lim = tempi;
}
/* This command stops the editing process. */
static void
stop_edit()
{
showrange = 0;
numeric_field = 0;
linelim = -1;
(void) move(1, 0);
(void) clrtoeol();
}
/*
* Motion commands. Forward motion commands take an argument
* which, when set, cause the forward motion to continue onto
* the null at the end of the line instead of stopping at the
* the last character of the line.
*/
static int
for_line(int arg, int stop_null)
{
int cpos = linelim;
if (linelim < 0)
return (linelim);
else if (linelim + arg <= strlen(line))
cpos += arg;
else
cpos = strlen(line);
if (cpos == strlen(line) && cpos > 0 && !stop_null)
return (cpos - 1);
else
return (cpos);
}
/* If end_word is non-zero, go to next end-of-word. Otherwise, go to next
* beginning-of-word.
*/
static int
for_word(int arg, int end_word, int stop_null)
{
register int c;
register int cpos;
cpos = linelim;
while (cpos < strlen(line) && arg--) {
if (end_word)
cpos++;
if (line[cpos] == ' ') {
while (line[cpos] == ' ')
cpos++;
if (cpos > 0 && line[cpos] == '\0')
--cpos;
if (!end_word)
continue;
}
if (istext(line[cpos])) {
while ((c = line[cpos]) && istext(c))
cpos++;
} else {
while ((c = line[cpos]) && !istext(c) && c != ' ')
cpos++;
}
if (end_word)
cpos--;
else while (line[cpos] == ' ')
cpos++;
if (cpos > 0 && line[cpos] == '\0' && !stop_null)
--cpos;
}
return (cpos);
}
static int
back_line(int arg)
{
if (linelim > arg)
return (linelim - arg);
else
return (0);
}
static int
back_word(int arg)
{
register int c;
register int cpos;
cpos = linelim;
while (cpos > 0 && arg--) {
if (line[cpos] == ' ') {
/* Skip white space */
while (cpos > 0 && line[cpos] == ' ')
--cpos;
} else if (cpos > 0 && (line[cpos-1] == ' '
|| ( istext(line[cpos]) && !istext(line[cpos-1]))
|| (!istext(line[cpos]) && istext(line[cpos-1])))) {
/* Started on the first char of a word - back up to prev. word */
--cpos;
while (cpos > 0 && line[cpos] == ' ')
--cpos;
}
/* Skip across the word - goes 1 too far */
if (istext(line[cpos])) {
while (cpos > 0 && (c = line[cpos]) && istext(c))
--cpos;
} else {
while (cpos > 0 && (c = line[cpos]) && !istext(c) && c != ' ')
--cpos;
}
/* We are done - fix up the one too far */
if (cpos > 0 && line[cpos] && line[cpos+1])
cpos++;
}
return(cpos);
}
/* Text manipulation commands */
/* If back_null is set, back up if the deletion leaves you at the null
* line terminator. Otherwise, don't.
*/
static void
del_in_line(int arg, int back_null)
{
register int len, i;
if (linelim >= 0) {
len = strlen(line);
if (arg > len - linelim)
arg = len - linelim;
if (linelim == len && linelim > 0)
linelim--;
strncpy(putbuf, line + linelim, arg);
putbuf[arg] = '\0';
for (i = linelim; i < len; i++)
line[i] = line[i+arg];
}
if (back_null && linelim > 0 && line[linelim] == '\0')
--linelim;
}
void
ins_in_line(int c)
{
register int i, len;
if (c < 256) {
if (linelim < 0) {
*line = '\0';
linelim = 0;
}
len = strlen(line);
for (i = len; i >= linelim; --i)
line[i+1] = line[i];
line[linelim++] = c;
line[len+1] = '\0';
}
}
void
ins_string(char *s)
{
while (*s)
ins_in_line(*s++);
}
static void
append_line()
{
register int i;
i = linelim;
if (i >= 0 && line[i])
linelim++;
insert_mode();
}
static void
change_case(arg)
{
if (linelim < 0) {
linelim = 0;
*line = '\0';
}
while (arg--) {
if (islower(line[linelim]))
line[linelim] = toupper(line[linelim]);
else if (isupper(line[linelim]))
line[linelim] = tolower(line[linelim]);
linelim = for_line(1, 0);
}
}
static void
rep_char()
{
int c;
if (linelim < 0) {
linelim = 0;
*line = '\0';
}
c = vigetch();
savedot(c);
if (c < 256 && c!= ESC && c != ctl('g')) {
if (line[linelim] == '\0')
line[linelim+1] = '\0';
line[linelim] = c;
}
}
static void
replace_in_line(int c)
{
register int len;
if (c < 256) {
if (linelim < 0) {
linelim = 0;
*line = '\0';
}
len = strlen(line);
line[linelim++] = c;
if (linelim > len)
line[linelim] = '\0';
}
}
static void
back_space()
{
if (linelim == 0)
return;
if (line[linelim] == '\0') {
linelim = back_line(1);
del_in_line(1, 1);
linelim = strlen(line);
} else {
linelim = back_line(1);