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vi.c
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/*
* NEATVI Editor
*
* Copyright (C) 2015-2024 Ali Gholami Rudi <ali at rudi dot ir>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <ctype.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include "vi.h"
/* parts of the screen to update; returned from vc_* functions */
#define VC_COL 1 /* only obtain cursor column from xoff */
#define VC_ROW 2 /* only the current line was updated */
#define VC_WIN 4 /* only the current window was updated */
#define VC_ALT 8 /* only the other window was updated */
#define VC_OK 16 /* already updated */
#define VC_ALL 12 /* all windows were updated */
static char vi_msg[EXLEN]; /* current message */
static char vi_charlast[8]; /* the last character searched via f, t, F, or T */
static int vi_charcmd; /* the character finding command */
static int vi_arg1, vi_arg2; /* the first and second arguments */
static int vi_ybuf; /* current yank buffer */
static int vi_pcol; /* the column requested by | command */
static int vi_printed; /* ex_print() calls since the last command */
static int vi_scroll; /* scroll amount for ^f and ^d */
static int vi_soset, vi_so; /* search offset; 1 in "/kw/1" */
static int w_cnt = 1; /* window count */
static int w_cur; /* active window identifier */
static int w_tmp; /* temporary window */
static char *w_path; /* saved window path */
static int w_row, w_off, w_top, w_left; /* saved window configuration */
static int vc_status(void);
static void vi_wait(void)
{
if (vi_printed > 1 || vi_printed < 0) {
if (vi_printed < 0)
term_window(0, term_rowx() - 1);
term_pos(xrows, 0);
free(led_prompt("[enter to continue]", "", &xkmap, xhl ? "---" : "___", NULL));
vi_msg[0] = '\0';
}
vi_printed = 0;
}
static void vi_drawmsg(void)
{
led_printmsg(vi_msg[0] ? vi_msg : "\n", xrows, xhl ? "---" : "___");
vi_msg[0] = '\0';
}
static void vi_drawquick(char *s, int row)
{
led_printmsg(s, row, xhl ? "---" : "___");
}
static void vi_drawrow(int row)
{
char *s = lbuf_get(xb, row);
if (xhll && row == xrow)
syn_context(conf_hlline());
led_print(s ? s : (row ? "~" : ""), row - xtop, xleft, xhl ? ex_filetype() : "");
syn_context(0);
}
/* redraw the given row; if row is -1 redraws all rows */
static void vi_drawagain(int xcol, int row)
{
int i;
for (i = xtop; i < xtop + xrows; i++)
if (row < 0 || i == row)
vi_drawrow(i);
vi_drawmsg();
}
/* update the screen */
static void vi_drawupdate(int otop)
{
int i = 0;
if (otop != xtop) {
term_pos(0, 0);
term_room(otop - xtop);
if (xtop > otop) {
int n = MIN(xtop - otop, xrows);
for (i = 0; i < n; i++)
vi_drawrow(xtop + xrows - n + i);
} else {
int n = MIN(otop - xtop, xrows);
for (i = 0; i < n; i++)
vi_drawrow(xtop + i);
}
}
vi_drawmsg();
}
/* update the screen by replacing lines r1 to r2 with n lines */
static void vi_drawfix(int r1, int r2, int n, int preview)
{
int dis = n - (r2 - r1 + 1);
int i;
if (preview && r1 < xtop)
xtop = r1;
r1 = MIN(MAX(r1, xtop), xtop + xrows - 1);
r2 = MIN(MAX(r2, xtop), xtop + xrows - 1);
term_record();
term_pos(r1 - xtop, 0);
term_room(r1 - r2 - 1 + n);
/* new lines are visible */
if (dis < 0 && r1 + n < xtop + xrows) {
xtop += preview ? -dis : 0;
for (i = r1 + n + (preview ? -dis : 0); i < xtop + xrows; i++)
vi_drawrow(i);
xtop -= preview ? -dis : 0;
}
/* draw replaced lines */
for (i = r1; i < xtop + xrows; i++)
if (i < r1 + n)
vi_drawrow(i);
term_commit();
}
static int vi_switch(int id)
{
int beg = 0;
int cnt = term_rowx();
if (id >= w_cnt)
return 1;
if (id != w_cur) {
char cmd[1024];
char *old = w_path && w_path[0] ? w_path : "/";
int row = w_row, off = w_off, top = w_top, left = w_left;
char *ec = "ew";
if (w_path && strcmp(w_path, ex_path()) == 0)
ec = "e";
snprintf(cmd, sizeof(cmd), "%s! %s", ec, old);
free(w_path);
w_path = uc_dup(ex_path());
w_row = xrow, w_off = xoff, w_top = xtop, w_left = xleft;
ex_command(cmd);
xrow = row, xoff = off, xtop = top, xleft = left;
}
if (w_cnt == 2) {
int half = cnt / 2;
beg = id == 0 ? 0 : half;
cnt = id == 0 ? half : term_rowx() - half;
}
term_window(beg, cnt - 1);
w_cur = id;
return 0;
}
static int vi_wsplit(void)
{
if (w_cnt != 1)
return 1;
free(w_path);
w_cnt = 2;
w_path = uc_dup(ex_path());
w_row = xrow, w_off = xoff, w_top = xtop, w_left = xleft;
return vi_switch(0);
}
static int vi_wonly(void)
{
if (w_cnt != 2)
return 1;
w_cnt = 1;
w_cur = 0;
return vi_switch(0);
}
static int vi_wclose(void)
{
if (w_cnt != 2)
return 1;
vi_switch(1 - w_cur);
return vi_wonly();
}
static int vi_wswap(void)
{
if (w_cnt != 2)
return 1;
w_cur = 1 - w_cur;
return 0;
}
static void vi_wfix(void)
{
if (xrow < 0 || xrow >= lbuf_len(xb))
xrow = lbuf_len(xb) ? lbuf_len(xb) - 1 : 0;
if (xtop > xrow)
xtop = xtop - xrows / 2 > xrow ?
MAX(0, xrow - xrows / 2) : xrow;
if (xtop + xrows <= xrow)
xtop = xtop + xrows + xrows / 2 <= xrow ?
xrow - xrows / 2 : xrow - xrows + 1;
xoff = ren_noeol(lbuf_get(xb, xrow), xoff);
}
static int vi_wmirror(void)
{
vi_wonly();
return vi_wsplit();
}
static int vi_buf[128];
static int vi_buflen;
static int vi_read(void)
{
return vi_buflen ? vi_buf[--vi_buflen] : term_read();
}
static void vi_back(int c)
{
if (vi_buflen < sizeof(vi_buf))
vi_buf[vi_buflen++] = c;
}
static char *vi_char(void)
{
return led_read(&xkmap);
}
/* map cursor horizontal position to terminal column number */
static int vi_pos(char *s, int pos)
{
return dir_context(s ? s : "") >= 0 ? pos - xleft : xleft + xcols - pos - 1;
}
static char *vi_prompt(char *msg, int *kmap, char *hist)
{
char *r, *s;
term_pos(xrows, vi_pos(msg, 0));
term_kill();
s = led_prompt(msg, "", kmap, xhl ? "-ex" : "___", xhist != 0 ? hist : NULL);
if (!s)
return NULL;
r = uc_dup(strlen(s) >= strlen(msg) ? s + strlen(msg) : s);
free(s);
return r;
}
/* read an ex input line */
char *ex_read(char *msg)
{
struct sbuf *sb;
int c;
if (xvis)
term_pos(xrows - 1, 0);
if (xled) {
char *s = led_prompt(msg, "", &xkmap, xhl ? "-ex" : "___", NULL);
if (s)
term_chr('\n');
return s;
}
sb = sbuf_make();
while ((c = getchar()) != EOF && c != '\n')
sbuf_chr(sb, c);
if (c == EOF) {
sbuf_free(sb);
return NULL;
}
return sbuf_done(sb);
}
/* show an ex message */
void ex_show(char *msg)
{
if (xvis) {
snprintf(vi_msg, sizeof(vi_msg), "%s", msg);
} else if (xled) {
led_print(msg, -1, 0, xhl ? "-ex" : "___");
term_chr('\n');
} else {
printf("%s", msg);
}
}
/* print an ex output line */
void ex_print(char *line)
{
if (xvis) {
if (line && vi_printed == 0)
snprintf(vi_msg, sizeof(vi_msg), "%s", line);
if (line && vi_printed == 1)
led_print(vi_msg, xrows - 1, 0, xhl ? "-ex" : "");
if (vi_printed)
term_chr('\n');
if (line && vi_printed)
led_print(line, xrows - 1, 0, xhl ? "-ex" : "");
vi_printed += line != NULL ? 1 : -1000;
} else {
if (line)
ex_show(line);
}
}
static char *reg_getln(int h)
{
return reg_get(0x80 | h, NULL);
}
static void reg_putln(int h, char *s)
{
char *old = reg_get(0x80 | h, NULL);
struct sbuf *sb;
int i = 0;
if (xhist == 0 || s == NULL || s[0] == '\0' || s[0] == '\n')
return;
/* ignore duplicate lines */
if (old != NULL) {
while (s[i] && old[i] == s[i])
i++;
if (!s[i] && old[i] == '\n')
return;
}
/* omit old lines */
if (xhist > 0 && old != NULL) {
char *end = old;
for (i = 1; end != NULL && i < xhist; i++)
end = strchr(end == old ? end : end + 1, '\n');
if (end != NULL)
end[1] = '\0';
}
/* add the new line */
sb = sbuf_make();
sbuf_str(sb, s);
if (strchr(s, '\n') == NULL)
sbuf_chr(sb, '\n');
if (old != NULL)
sbuf_str(sb, old);
reg_put(0x80 | h, sbuf_buf(sb), 1);
sbuf_free(sb);
}
static int vi_yankbuf(void)
{
int c = vi_read();
if (c == '"')
return (c = vi_read()) == '\\' ? 0x80 | vi_read() : c;
vi_back(c);
return 0;
}
static int vi_prefix(void)
{
int n = 0;
int c = vi_read();
if ((c >= '1' && c <= '9')) {
while (isdigit(c)) {
n = n * 10 + c - '0';
c = vi_read();
}
}
vi_back(c);
return n;
}
static int vi_col2off(struct lbuf *lb, int row, int col)
{
char *ln = lbuf_get(lb, row);
return ln ? ren_off(ln, col) : 0;
}
static int vi_off2col(struct lbuf *lb, int row, int off)
{
char *ln = lbuf_get(lb, row);
return ln ? ren_pos(ln, off) : 0;
}
static int vi_nextoff(struct lbuf *lb, int dir, int *row, int *off)
{
int o = *off + dir;
if (o < 0 || !lbuf_get(lb, *row) || o >= uc_slen(lbuf_get(lb, *row)))
return 1;
*off = o;
return 0;
}
static int vi_nextcol(struct lbuf *lb, int dir, int *row, int *off)
{
char *ln = lbuf_get(lb, *row);
int col = ln ? ren_pos(ln, *off) : 0;
int o = ln ? ren_next(ln, col, dir) : -1;
if (o < 0)
return -1;
*off = ren_off(ln, o);
return 0;
}
static int vi_findchar(struct lbuf *lb, char *cs, int cmd, int n, int *row, int *off)
{
if (cs != vi_charlast)
strcpy(vi_charlast, cs);
vi_charcmd = cmd;
return lbuf_findchar(lb, cs, cmd, n, row, off);
}
static int vi_search(int cmd, int cnt, int *row, int *off)
{
char *kwd;
int r = *row;
int o = *off;
char *failed = NULL;
int len = 0;
int i, dir;
if (cmd == '/' || cmd == '?') {
char sign[4] = {cmd};
struct sbuf *sb;
char *kw = vi_prompt(sign, &xkmap, reg_getln('/'));
char *re;
if (!kw)
return 1;
sb = sbuf_make();
sbuf_chr(sb, cmd);
sbuf_str(sb, kw);
free(kw);
kw = sbuf_buf(sb);
if ((re = re_read(&kw))) {
ex_kwdset(re[0] ? re : NULL, cmd == '/' ? +1 : -1);
if (re[0]) {
reg_putln('/', re);
reg_put('/', re, 0);
}
while (isspace(*kw))
kw++;
vi_soset = !!kw[0];
vi_so = atoi(kw);
free(re);
}
sbuf_free(sb);
}
if (!lbuf_len(xb) || ex_kwd(&kwd, &dir))
return 1;
dir = cmd == 'N' ? -dir : dir;
o = *off;
for (i = 0; i < cnt; i++) {
if (lbuf_search(xb, kwd, dir, &r, &o, &len)) {
failed = " not found";
break;
}
if (i + 1 < cnt && cmd == '/')
o += len;
}
if (!failed) {
*row = r;
*off = o;
if (vi_soset) {
*off = -1;
if (*row + vi_so < 0 || *row + vi_so >= lbuf_len(xb))
failed = " bad offset";
else
*row += vi_so;
}
}
if (failed != NULL)
snprintf(vi_msg, sizeof(vi_msg), "/%s/%s", kwd, failed ? failed : "");
return failed != NULL;
}
/* read a line motion */
static int vi_motionln(int *row, int cmd)
{
int cnt = (vi_arg1 ? vi_arg1 : 1) * (vi_arg2 ? vi_arg2 : 1);
int c = vi_read();
int mark, mark_row, mark_off;
switch (c) {
case '\n':
case '+':
*row = MIN(*row + cnt, lbuf_len(xb) - 1);
break;
case '-':
*row = MAX(*row - cnt, 0);
break;
case '_':
*row = MIN(*row + cnt - 1, lbuf_len(xb) - 1);
break;
case '\'':
if ((mark = vi_read()) <= 0)
return -1;
if (lbuf_jump(xb, mark, &mark_row, &mark_off))
return -1;
*row = mark_row;
break;
case 'j':
*row = MIN(*row + cnt, lbuf_len(xb) - 1);
break;
case 'k':
*row = MAX(*row - cnt, 0);
break;
case 'G':
*row = (vi_arg1 || vi_arg2) ? cnt - 1 : lbuf_len(xb) - 1;
break;
case 'H':
*row = MIN(xtop + cnt - 1, lbuf_len(xb) - 1);
break;
case 'L':
*row = MIN(xtop + xrows - 1 - cnt + 1, lbuf_len(xb) - 1);
break;
case 'M':
*row = MIN(xtop + xrows / 2, lbuf_len(xb) - 1);
break;
default:
if (c == cmd) {
*row = MIN(*row + cnt - 1, lbuf_len(xb) - 1);
break;
}
if (c == '%' && (vi_arg1 || vi_arg2)) {
if (cnt > 100)
return -1;
*row = MAX(0, lbuf_len(xb) - 1) * cnt / 100;
break;
}
vi_back(c);
return 0;
}
if (*row < 0)
*row = 0;
return c;
}
static int vi_curword(struct lbuf *lb, char *dst, int len, int row, int off, char *ext)
{
char *ln = lbuf_get(lb, row);
char *beg, *end;
if (!ln)
return 1;
beg = uc_chr(ln, ren_noeol(ln, off));
end = beg;
while (*end && (uc_kind(end) == 1 ||
strchr(ext, (unsigned char) end[0]) != NULL))
end = uc_next(end);
while (beg > ln && (uc_kind(uc_beg(ln, beg - 1)) == 1 ||
strchr(ext, (unsigned char) beg[-1]) != NULL))
beg = uc_beg(ln, beg - 1);
if (beg >= end)
return 1;
len = len - 1 < end - beg ? len - 1 : end - beg;
dst[len] = '\0';
memcpy(dst, beg, len);
return 0;
}
/* read a motion */
static int vi_motion(int *row, int *off)
{
char cw[120], kw[128];
int cnt = (vi_arg1 ? vi_arg1 : 1) * (vi_arg2 ? vi_arg2 : 1);
char *ln = lbuf_get(xb, *row);
int dir = dir_context(ln ? ln : "");
int mark, mark_row, mark_off;
char *cs;
int mv;
int i;
if ((mv = vi_motionln(row, 0))) {
*off = -1;
return mv;
}
mv = vi_read();
switch (mv) {
case 'f':
if (!(cs = vi_char()))
return -1;
if (vi_findchar(xb, cs, mv, cnt, row, off))
return -1;
break;
case 'F':
if (!(cs = vi_char()))
return -1;
if (vi_findchar(xb, cs, mv, cnt, row, off))
return -1;
break;
case ';':
if (!vi_charlast[0])
return -1;
if (vi_findchar(xb, vi_charlast, vi_charcmd, cnt, row, off))
return -1;
break;
case ',':
if (!vi_charlast[0])
return -1;
if (vi_findchar(xb, vi_charlast, vi_charcmd, -cnt, row, off))
return -1;
break;
case 'h':
for (i = 0; i < cnt; i++)
if (vi_nextcol(xb, -1 * dir, row, off))
break;
break;
case 'l':
for (i = 0; i < cnt; i++)
if (vi_nextcol(xb, +1 * dir, row, off))
break;
break;
case 't':
if (!(cs = vi_char()))
return -1;
if (vi_findchar(xb, cs, mv, cnt, row, off))
return -1;
break;
case 'T':
if (!(cs = vi_char()))
return -1;
if (vi_findchar(xb, cs, mv, cnt, row, off))
return -1;
break;
case 'B':
for (i = 0; i < cnt; i++)
if (lbuf_wordend(xb, 1, -1, row, off))
break;
break;
case 'E':
for (i = 0; i < cnt; i++)
if (lbuf_wordend(xb, 1, +1, row, off))
break;
break;
case 'W':
for (i = 0; i < cnt; i++)
if (lbuf_wordbeg(xb, 1, +1, row, off))
break;
break;
case 'b':
for (i = 0; i < cnt; i++)
if (lbuf_wordend(xb, 0, -1, row, off))
break;
break;
case 'e':
for (i = 0; i < cnt; i++)
if (lbuf_wordend(xb, 0, +1, row, off))
break;
break;
case 'w':
for (i = 0; i < cnt; i++)
if (lbuf_wordbeg(xb, 0, +1, row, off))
break;
break;
case '{':
for (i = 0; i < cnt; i++)
if (lbuf_paragraphbeg(xb, -1, row, off))
break;
break;
case '}':
for (i = 0; i < cnt; i++)
if (lbuf_paragraphbeg(xb, +1, row, off))
break;
break;
case '[':
if (vi_read() != '[')
return -1;
for (i = 0; i < cnt; i++)
if (lbuf_sectionbeg(xb, -1, conf_section(ex_filetype()), row, off))
break;
break;
case ']':
if (vi_read() != ']')
return -1;
for (i = 0; i < cnt; i++)
if (lbuf_sectionbeg(xb, +1, conf_section(ex_filetype()), row, off))
break;
break;
case '0':
*off = 0;
break;
case '^':
*off = lbuf_indents(xb, *row);
break;
case '$':
*off = lbuf_eol(xb, *row);
break;
case '|':
*off = vi_col2off(xb, *row, cnt - 1);
vi_pcol = cnt - 1;
break;
case '/':
if (vi_search(mv, cnt, row, off))
return -1;
break;
case '?':
if (vi_search(mv, cnt, row, off))
return -1;
break;
case 'n':
if (vi_search(mv, cnt, row, off))
return -1;
break;
case 'N':
if (vi_search(mv, cnt, row, off))
return -1;
break;
case TK_CTL('a'):
if (vi_curword(xb, cw, sizeof(cw), *row, *off, "") != 0)
return -1;
snprintf(kw, sizeof(kw), "\\<%s\\>", cw);
ex_kwdset(kw, +1);
vi_soset = 0;
if (vi_search('n', cnt, row, off))
return -1;
break;
case ' ':
for (i = 0; i < cnt; i++)
if (vi_nextoff(xb, +1, row, off))
break;
break;
case 127:
case TK_CTL('h'):
for (i = 0; i < cnt; i++)
if (vi_nextoff(xb, -1, row, off))
break;
break;
case '`':
if ((mark = vi_read()) <= 0)
return -1;
if (lbuf_jump(xb, mark, &mark_row, &mark_off))
return -1;
*row = mark_row;
*off = mark_off;
break;
case '%':
if (lbuf_pair(xb, row, off))
return -1;
break;
default:
vi_back(mv);
return 0;
}
return mv;
}
static void swap(int *a, int *b)
{
int t = *a;
*a = *b;
*b = t;
}
static char *lbuf_region(struct lbuf *lb, int r1, int o1, int r2, int o2)
{
struct sbuf *sb;
char *s1, *s2, *s3;
if (r1 == r2)
return uc_sub(lbuf_get(lb, r1), o1, o2);
sb = sbuf_make();
s1 = uc_sub(lbuf_get(lb, r1), o1, -1);
s3 = uc_sub(lbuf_get(lb, r2), 0, o2);
s2 = lbuf_cp(lb, r1 + 1, r2);
sbuf_str(sb, s1);
sbuf_str(sb, s2);
sbuf_str(sb, s3);
free(s1);
free(s2);
free(s3);
return sbuf_done(sb);
}
static int vi_yank(int r1, int o1, int r2, int o2, int lnmode)
{
char *region;
region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
reg_put(vi_ybuf, region, lnmode);
free(region);
xrow = r1;
xoff = lnmode ? xoff : o1;
return 0;
}
static int vi_delete(int r1, int o1, int r2, int o2, int lnmode)
{
char *pref, *post;
char *region;
region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
reg_put(vi_ybuf, region, lnmode);
free(region);
pref = lnmode ? uc_dup("") : uc_sub(lbuf_get(xb, r1), 0, o1);
post = lnmode ? uc_dup("\n") : uc_sub(lbuf_get(xb, r2), o2, -1);
if (!lnmode) {
char *line = uc_cat(pref, post);
lbuf_edit(xb, line, r1, r2 + 1);
free(line);
} else {
lbuf_edit(xb, NULL, r1, r2 + 1);
}
xrow = r1;
xoff = lnmode ? lbuf_indents(xb, xrow) : o1;
free(pref);
free(post);
vi_drawfix(r1, r2, !lnmode, 0);
return VC_OK;
}
static int linecount(char *s)
{
int n;
for (n = 0; s; n++)
if ((s = strchr(s, '\n')))
s++;
return n;
}
static int charcount(char *text, char *post)
{
int tlen = strlen(text);
int plen = strlen(post);
char *nl = text;
int i;
if (tlen < plen)
return 0;
for (i = 0; i < tlen - plen; i++)
if (text[i] == '\n')
nl = text + i + 1;
return uc_slen(nl) - uc_slen(post);
}
static void vi_nextline(void)
{
if (xrow == xtop + xrows - 1) {
term_chr('\n');
term_pos(++xrow - ++xtop, 0);
} else {
term_pos(++xrow - xtop, 0);
term_room(1);
}
}
static void vi_showinfo(char *ln)
{
char cmd[512];
char *info = " ";
char *beg = NULL, *end = NULL;
int lastkind = 0;
char *s, *r;
for (s = ln; s && *s; s = uc_next(s)) {
int kind = uc_kind(s);
if (lastkind != 1 && kind == 1)
beg = s;
if (lastkind == 1 && kind != 1)
end = s;
lastkind = kind;
}
end = lastkind == 1 ? s : end;
if (beg != NULL) {
char tag[128];
int pos = 0, dir = 0;
if (beg != NULL && end - beg + 1 > sizeof(tag))
end = beg + sizeof(tag) - 1;
memcpy(tag, beg, end - beg);
tag[end - beg] = '\0';
if (!tag_find(tag, &pos, dir, NULL, 0, cmd, sizeof(cmd)))
if ((r = strrchr(cmd, '"')) != NULL)
info = r + 1;
}
led_printmsg(info, xrows, xhl ? "---" : "___");
term_pos(xrow - xtop, 0);
}
static char *vi_input(char *pref, char *post, int *row, int *off)
{
char *rep = led_input(pref, post, &xleft, &xkmap, xhl ? ex_filetype() : "", vi_nextline, vi_showinfo);
if (!rep)
return NULL;
*row = linecount(rep) - 1;
*off = charcount(rep, post) - 1;
if (*off < 0)
*off = 0;
return rep;
}
static char *vi_indents(char *ln)
{
struct sbuf *sb = sbuf_make();
while (xai && ln && (*ln == ' ' || *ln == '\t'))
sbuf_chr(sb, *ln++);
return sbuf_done(sb);
}
static int vi_change(int r1, int o1, int r2, int o2, int lnmode)
{
char *region;
int row, off;
char *rep;
char *pref, *post;
region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
reg_put(vi_ybuf, region, lnmode);
free(region);
pref = lnmode ? vi_indents(lbuf_get(xb, r1)) : uc_sub(lbuf_get(xb, r1), 0, o1);
post = lnmode ? uc_dup("\n") : uc_sub(lbuf_get(xb, r2), o2, -1);
xrow = r1;
vi_drawfix(r1, r2, 1, 1);
rep = vi_input(pref, post, &row, &off);
if (rep) {
lbuf_edit(xb, rep, r1, r2 + 1);
xrow = r1 + row - 1;
xoff = off;
free(rep);
}
free(pref);
free(post);
if (rep == NULL)
return 0;
vi_drawfix(r1, r1 + row - 1, row, 0);
return VC_OK;
}
static int vi_case(int r1, int o1, int r2, int o2, int lnmode, int cmd)
{
char *pref, *post;
char *region, *s;
region = lbuf_region(xb, r1, lnmode ? 0 : o1, r2, lnmode ? -1 : o2);
s = region;
while (*s) {
int c = (unsigned char) s[0];
if (c <= 0x7f) {
if (cmd == 'u')
s[0] = tolower(c);
if (cmd == 'U')
s[0] = toupper(c);
if (cmd == '~')
s[0] = islower(c) ? toupper(c) : tolower(c);
}
s = uc_next(s);
}
pref = lnmode ? uc_dup("") : uc_sub(lbuf_get(xb, r1), 0, o1);
post = lnmode ? uc_dup("\n") : uc_sub(lbuf_get(xb, r2), o2, -1);
if (!lnmode) {
struct sbuf *sb = sbuf_make();
sbuf_str(sb, pref);
sbuf_str(sb, region);
sbuf_str(sb, post);
lbuf_edit(xb, sbuf_buf(sb), r1, r2 + 1);
sbuf_free(sb);
} else {
lbuf_edit(xb, region, r1, r2 + 1);
}
xrow = r2;
xoff = lnmode ? lbuf_indents(xb, r2) : o2;
free(region);
free(pref);
free(post);
vi_drawfix(r1, r2, r2 - r1 + 1, 0);
return VC_OK;
}
static int vi_pipe(int r1, int r2)
{
char *text;
char *rep;
int kmap = 0;
char *cmd = vi_prompt("!", &kmap, reg_getln('!'));
if (!cmd)
return 0;
reg_put('!', cmd, 1);
reg_putln('!', cmd);
text = lbuf_cp(xb, r1, r2 + 1);
rep = cmd_pipe(cmd, text, 1);
if (rep)
lbuf_edit(xb, rep, r1, r2 + 1);
free(cmd);
free(text);
free(rep);
return VC_WIN;
}
static int vi_shift(int r1, int r2, int dir)
{
struct sbuf *sb;
char *ln;
int i;
for (i = r1; i <= r2; i++) {
if (!(ln = lbuf_get(xb, i)))
continue;
sb = sbuf_make();
if (dir > 0) {
if (ln[0] != '\n')
sbuf_chr(sb, '\t');
} else {
ln = ln[0] == ' ' || ln[0] == '\t' ? ln + 1 : ln;
}
sbuf_str(sb, ln);
lbuf_edit(xb, sbuf_buf(sb), i, i + 1);
sbuf_free(sb);
}