static struct textline *alloc_line()
{
register struct textline *p;
/* kmwang: For badident */
extern BOOL IsRealSysop;
if (IsRealSysop)
{
if (total_num_of_line > 8192) /* lthuang: debug */
{
indigestion(3);
abort_bbs(0);
}
}
else if (total_num_of_line > 2048) /* lthuang: debug */
{
indigestion(3);
abort_bbs(0);
}
p = (struct textline *) malloc(sizeof(*p));
if (p == NULL)
{
indigestion(13);
abort_bbs(0);
}
p->next = NULL;
p->prev = NULL;
p->data[0] = '\0';
p->len = 0;
total_num_of_line++;
return p;
}
static void insert_char(register int ch)
{
register int i;
register char *s;
register struct textline *p = currline;
register BOOL wordwrap = TRUE;
if (currpnt > p->len)
{
indigestion(1);
return;
}
for (i = p->len; i >= currpnt; i--)
p->data[i + 1] = p->data[i];
p->data[currpnt++] = ch;
p->len++;
if (p->len < WRAPMARGIN)
return;
s = p->data + (p->len - 1);
while (s != p->data && *s == ' ')
s--;
while (s != p->data && *s != ' ')
s--;
if (s == p->data)
{
wordwrap = FALSE;
s = p->data + (p->len - 2);
}
split(p, (s - p->data) + 1);
p = p->next;
if (wordwrap && p->len >= 1)
{
i = p->len;
if (p->data[i - 1] != ' ')
{
p->data[i] = ' ';
p->data[i + 1] = '\0';
p->len++;
}
}
while (!join(p))
{
p = p->next;
if (p == NULL)
{
indigestion(2);
break;
}
}
}
struct textline * alloc_line() {
register struct textline *p;
p = (struct textline *) malloc(sizeof(*p));
if (p == NULL) {
indigestion(13);
abort_bbs(0);
}
p->next = NULL;
p->prev = NULL;
p->data[0] = '\0';
p->len = 0;
p->attr = 0; /* for copy/paste */
return p;
}
/*
* join connects 'line' and the next line. It returns true if:
*
* 1) lines were joined and one was deleted
* 2) lines could not be joined
* 3) next line is empty
*
* returns false if:
*
* 1) Some of the joined line wrapped
*/
static int join(register struct textline *line)
{
register int ovfl;
if (!line->next)
return TRUE;
if (*killsp(line->next->data) == '\0')
return TRUE;
ovfl = line->len + line->next->len - WRAPMARGIN;
if (ovfl < 0)
{
strcat(line->data, line->next->data);
line->len += line->next->len;
delete_line(line->next);
return TRUE;
}
else
{
register char *s;
register struct textline *p = line->next;
s = p->data + p->len - ovfl - 1;
while (s != p->data && *s == ' ')
s--;
while (s != p->data && *s != ' ')
s--;
if (s == p->data)
return TRUE;
split(p, (s - p->data) + 1);
/* indicate one of the two line are longer than WRAPMARGIN */
if (line->len + p->len >= WRAPMARGIN)
{
indigestion(0);
return TRUE;
}
join(line); /* ? */
p = line->next;
if (p->len >= 1 && p->len + 1 < WRAPMARGIN) /* ? */
{
if (p->data[p->len - 1] != ' ')
{
strcat(p->data, " ");
p->len++;
}
}
return FALSE;
}
}
static void join_currline()
{
struct textline *p = currline;
while (!join(p))
{
p = p->next;
if (p == NULL)
{
indigestion(2);
abort_bbs(0);
}
}
redraw_everything = TRUE;
}
static void delete_char()
{
register int i;
if (currline->len == 0)
return;
if (currpnt >= currline->len)
{
indigestion(1);
return;
}
for (i = currpnt; i != currline->len; i++)
currline->data[i] = currline->data[i + 1];
currline->len--;
}
static void backup_file(register char *bakfile)
{
register FILE *fp;
register struct textline *p;
if ((fp = fopen(bakfile, "w")) == NULL)
{
indigestion(5);
abort_bbs(0);
}
for (p = firstline; p != NULL; p = p->next)
{
if (p == lastline && p->data[0] == '\0')
break;
fprintf(fp, "%s\n", p->data);
}
fclose(fp);
chmod(bakfile, 0600); /* lthuang */
}
/*
* read text from file into editor buffer
*/
static void read_file(const char *filename)
{
register int fd;
unsigned char ch;
vedit_init();
if ((fd = open(filename, O_RDONLY)) < 0)
{
if ((fd = open(filename, O_WRONLY | O_CREAT, 0644)) > 0)
{
close(fd);
return;
}
indigestion(4);
abort_bbs(0);
}
while (read(fd, &ch, 1) > 0)
{
if (ch == '\t')
{
do
{
insert_char(' ');
}
while (currpnt & 0x7);
}
#if defined(BIT8)
else if (isprint2(ch))
#else
else if (isprint(ch))
#endif
insert_char(ch);
else if (ch == '\n')
split(currline, currpnt);
}
close(fd);
}
int vedit(const char *filename, const char *saveheader, char *bname)
{
int ch, foo;
int lastcharindent = -1;
BOOL firstkey = TRUE;
char bakfile[PATHLEN];
int old_rows = t_lines, old_columns = t_columns;
sethomefile(bakfile, curuser.userid, UFNAME_EDIT);
if ((saveheader || uinfo.mode == EDITPLAN || uinfo.mode == EDITBMWEL)
&& isfile(bakfile) /* lthuang */
#ifdef GUEST
&& strcmp(curuser.userid, GUEST)
#endif
)
{
clear();
outs(_msg_edit_8);
if (getkey() != '2')
mycp(bakfile, filename);
}
if (!isfile(filename))
unlink(bakfile);
if (saveheader)
do_article_sig(filename);
read_file(filename);
top_of_win = firstline;
currline = firstline;
curr_window_line = 0;
currpnt = 0;
ansi_mode = FALSE;
clear();
display_buffer();
move(curr_window_line, currpnt);
while ((ch = getkey()) != EOF)
{
if (firstkey)
{
firstkey = FALSE;
show_help_msg();
}
if (talkrequest) /* lthuang */
{
backup_file(bakfile);
talkreply();
pressreturn();
ch = CTRL('G'); /* redraw screen */
}
else if (msqrequest) /* lthuang */
{
msqrequest = FALSE;
msq_reply();
#if 0
ch = CTRL('G');
#endif
}
if (old_rows != t_lines || old_columns != t_columns)
{
static const char *msg_resized = "[1;34;47m螢幕大小已改變, 按(Ctrl-G)回到頁首![m";
old_rows = t_lines;
old_columns = t_columns;
top_of_win = firstline;
currline = top_of_win;
curr_window_line = 0;
currpnt = 0;
shift = 0;
redraw_everything = TRUE;
move(t_lines / 2, (t_columns - strlen(msg_resized)) / 2);
outs(msg_resized);
while (getkey() != CTRL('G'));
}
else if (ch < 0x100 && isprint2(ch))
{
insert_char(ch);
lastcharindent = -1;
}
else
switch (ch)
{
case KEY_UP:
if (lastcharindent == -1)
lastcharindent = currpnt;
if (!currline->prev)
{
bell();
break;
}
curr_window_line--;
currline = currline->prev;
currpnt = (currline->len > lastcharindent) ? lastcharindent : currline->len;
break;
case KEY_DOWN:
if (lastcharindent == -1)
lastcharindent = currpnt;
if (!currline->next)
{
bell();
break;
}
curr_window_line++;
currline = currline->next;
currpnt = (currline->len > lastcharindent) ? lastcharindent : currline->len;
break;
default:
lastcharindent = -1;
switch (ch)
{
case CTRL('T'):
top_of_win = back_line(lastline, b_lines - 2);
currline = lastline;
curr_window_line = getlineno();
currpnt = 0;
redraw_everything = TRUE;
break;
case CTRL('S'):
top_of_win = firstline;
currline = top_of_win;
curr_window_line = 0;
currpnt = 0;
redraw_everything = TRUE;
break;
case '\t':
do
{
insert_char(' ');
}
while (currpnt & 0x7);
break;
case CTRL('U'):
case CTRL('V'):
insert_char(0x1b);
break;
case CTRL('C'):
insert_char(0x1b);
insert_char('[');
insert_char('m');
break;
case KEY_RIGHT:
case CTRL('F'):
if (currline->len == currpnt)
{
if (!currline->next)
bell();
else
{
currpnt = 0;
curr_window_line++;
currline = currline->next;
}
}
else
currpnt++;
break;
case KEY_LEFT:
case CTRL('B'):
if (currpnt == 0)
{
if (!currline->prev)
bell();
else
{
currline = currline->prev;
currpnt = currline->len;
curr_window_line--;
}
}
else
currpnt--;
break;
case CTRL('G'):
clear();
redraw_everything = TRUE;
break;
case CTRL('Z'):
vedit_help();
break;
case KEY_PGUP:
case CTRL('P'):
top_of_win = back_line(top_of_win, b_lines - 2);
currline = top_of_win;
currpnt = 0;
curr_window_line = 0;
redraw_everything = TRUE;
break;
case KEY_PGDN:
case CTRL('N'):
top_of_win = forward_line(top_of_win, b_lines - 2);
currline = top_of_win;
currpnt = 0;
curr_window_line = 0;
redraw_everything = TRUE;
break;
case KEY_HOME:
case CTRL('A'):
currpnt = 0;
break;
case KEY_END:
case CTRL('E'):
currpnt = currline->len;
break;
case CTRL('R'):
#if 0
backup_file(bakfile);
#endif
msq_reply();
#if 0
redraw_everything = TRUE; /* lthuang */
#endif
break;
case CTRL('Q'):
ansi_mode = TRUE;
display_buffer();
pressreturn();
ansi_mode = FALSE;
display_buffer();
break;
case CTRL('X'):
case CTRL('W'):
backup_file(bakfile);
clear();
foo = write_file(filename, saveheader, bname);
if (foo == BACKUP_EDITING)
return foo;
else if (foo != KEEP_EDITING)
{
unlink(bakfile);
return foo;
}
redraw_everything = TRUE; /* lthuang */
break;
case '\r':
case '\n':
split(currline, currpnt);
/* lthuang: reduce the times of backup */
if (total_num_of_line % 7 == 0)
backup_file(bakfile);
break;
case '\177':
case CTRL('H'):
if (currpnt == 0)
{
if (!currline->prev)
{
bell();
break;
}
curr_window_line--;
currline = currline->prev;
currpnt = currline->len;
if (*killsp(currline->next->data) == '\0') {
delete_line(currline->next);
redraw_everything = TRUE;
} else {
join_currline();
}
if (curr_window_line == -1) {
curr_window_line = 0;
top_of_win = currline;
rscroll();
}
break;
}
currpnt--;
delete_char();
break;
case CTRL('D'):
if (currline->len == currpnt)
join_currline();
else
delete_char();
break;
case CTRL('Y'):
currpnt = 0;
currline->len = 0;
delete_currline();
break;
case CTRL('K'):
if (currline->len == 0)
delete_currline();
else if (currline->len == currpnt)
join_currline();
else
{
currline->len = currpnt;
currline->data[currpnt] = '\0';
}
break;
default:
break;
}
break;
}
if (curr_window_line == -1)
{
curr_window_line = 0;
if (!top_of_win->prev)
{
indigestion(6);
bell();
}
else
{
top_of_win = top_of_win->prev;
rscroll();
}
}
if (curr_window_line == t_lines - 1)
{
curr_window_line = t_lines - 2;
if (!top_of_win->next)
{
indigestion(7);
bell();
}
else
{
top_of_win = top_of_win->next;
scroll();
}
}
/* lthuang: 99/07 */
if (currpnt - shift >= t_columns - 1)
{
shift = (currpnt / (t_columns - 1)) * (t_columns - 1) - 1;
redraw_everything = TRUE;
}
else if (currpnt - shift < 0)
{
shift = 0;
redraw_everything = TRUE;
}
if (redraw_everything)
{
display_buffer();
redraw_everything = FALSE;
}
else
{
move(curr_window_line, 0);
clrtoeol(); /* lthuang */
vedit_outs(currline->data);
}
move(curr_window_line, currpnt - shift); /* lthuang: 99/07 */
}
if (uinfo.mode == POSTING || uinfo.mode == SMAIL)
unlink(filename);
return ABORT_EDITING;
}