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nano/winio.c
Chris Allegretta 4b376a4982 latest fixes 
git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1490 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2003-04-16 02:08:23 +00:00

1847 lines
46 KiB
C
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/* $Id$ */
/**************************************************************************
* winio.c *
* *
* Copyright (C) 1999-2003 Chris Allegretta *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
**************************************************************************/
#include "config.h"
#include <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <assert.h>
#include "proto.h"
#include "nano.h"
static int statblank = 0; /* Number of keystrokes left after
we call statusbar(), before we
actually blank the statusbar */
int do_first_line(void)
{
current = fileage;
placewewant = 0;
current_x = 0;
edit_update(current, CENTER);
return 1;
}
int do_last_line(void)
{
current = filebot;
placewewant = 0;
current_x = 0;
edit_update(current, CENTER);
return 1;
}
/* Return the placewewant associated with current_x. That is, xplustabs
* is the zero-based column position of the cursor. Value is no smaller
* than current_x. */
size_t xplustabs(void)
{
return strnlenpt(current->data, current_x);
}
/* Return what current_x should be, given xplustabs() for the line. */
size_t actual_x(const filestruct *fileptr, size_t xplus)
{
size_t i = 0;
/* the position in fileptr->data, returned */
size_t length = 0;
/* the screen display width to data[i] */
char *c;
/* fileptr->data + i */
assert(fileptr != NULL && fileptr->data != NULL);
for (c = fileptr->data; length < xplus && *c != '\0'; i++, c++) {
if (*c == '\t')
length += tabsize - length % tabsize;
else if (is_cntrl_char((int)*c))
length += 2;
else
length++;
}
assert(length == strnlenpt(fileptr->data, i));
assert(i <= strlen(fileptr->data));
if (length > xplus)
i--;
#ifdef DEBUG
fprintf(stderr, _("actual_x for xplus=%d returns %d\n"), xplus, i);
#endif
return i;
}
/* A strlen with tabs factored in, similar to xplustabs(). */
size_t strnlenpt(const char *buf, size_t size)
{
size_t length = 0;
if (buf != NULL)
for (; *buf != '\0' && size != 0; size--, buf++) {
if (*buf == '\t')
length += tabsize - (length % tabsize);
else if (is_cntrl_char((int)*buf))
length += 2;
else
length++;
}
return length;
}
size_t strlenpt(const char *buf)
{
return strnlenpt(buf, -1);
}
void blank_bottombars(void)
{
if (!no_help()) {
mvwaddstr(bottomwin, 1, 0, hblank);
mvwaddstr(bottomwin, 2, 0, hblank);
}
}
void blank_bottomwin(void)
{
if (ISSET(NO_HELP))
return;
mvwaddstr(bottomwin, 1, 0, hblank);
mvwaddstr(bottomwin, 2, 0, hblank);
}
void blank_edit(void)
{
int i;
for (i = 0; i <= editwinrows - 1; i++)
mvwaddstr(edit, i, 0, hblank);
}
void blank_statusbar(void)
{
mvwaddstr(bottomwin, 0, 0, hblank);
}
void blank_statusbar_refresh(void)
{
blank_statusbar();
wrefresh(bottomwin);
}
void check_statblank(void)
{
if (statblank > 1)
statblank--;
else if (statblank == 1 && !ISSET(CONSTUPDATE)) {
statblank--;
blank_statusbar_refresh();
}
}
/* Repaint the statusbar when getting a character in nanogetstr(). buf
* should be no longer than COLS - 4.
*
* Note that we must turn on A_REVERSE here, since do_help() turns it
* off! */
void nanoget_repaint(const char *buf, const char *inputbuf, int x)
{
int len = strlen(buf) + 2;
int wid = COLS - len;
assert(wid >= 2);
assert(0 <= x && x <= strlen(inputbuf));
wattron(bottomwin, A_REVERSE);
blank_statusbar();
mvwaddstr(bottomwin, 0, 0, buf);
waddch(bottomwin, ':');
waddch(bottomwin, x < wid ? ' ' : '$');
waddnstr(bottomwin, &inputbuf[wid * (x / wid)], wid);
wmove(bottomwin, 0, (x % wid) + len);
wattroff(bottomwin, A_REVERSE);
}
/* Get the input from the kb; this should only be called from
* statusq(). */
int nanogetstr(int allowtabs, const char *buf, const char *def,
#ifndef NANO_SMALL
historyheadtype *history_list,
#endif
const shortcut *s
#ifndef DISABLE_TABCOMP
, int *list
#endif
)
{
int kbinput;
static int x = -1;
/* the cursor position in 'answer' */
int xend;
/* length of 'answer', the status bar text */
int tabbed = 0;
/* used by input_tab() */
const shortcut *t;
#ifndef NANO_SMALL
/* for history */
char *history = NULL;
char *currentbuf = NULL;
char *complete = NULL;
int last_kbinput = 0, ret2cb = 0;
#endif
xend = strlen(def);
/* Only put x at the end of the string if it's uninitialized or if
it would be past the end of the string as it is. Otherwise,
leave it alone. This is so the cursor position stays at the same
place if a prompt-changing toggle is pressed. */
if (x == -1 || x > xend || resetstatuspos)
x = xend;
answer = charealloc(answer, xend + 1);
if (xend > 0)
strcpy(answer, def);
else
answer[0] = '\0';
#if !defined(DISABLE_HELP) || (!defined(DISABLE_MOUSE) && defined(NCURSES_MOUSE_VERSION))
currshortcut = s;
#endif
/* Get the input! */
nanoget_repaint(buf, answer, x);
/* Make sure any editor screen updates are displayed before getting
input */
wrefresh(edit);
while ((kbinput = wgetch(bottomwin)) != 13) {
for (t = s; t != NULL; t = t->next) {
#ifdef DEBUG
fprintf(stderr, _("Aha! \'%c\' (%d)\n"), kbinput, kbinput);
#endif
if (kbinput == t->val && kbinput < 32) {
#ifndef DISABLE_HELP
/* Have to do this here, it would be too late to do it
in statusq() */
if (kbinput == NANO_HELP_KEY || kbinput == NANO_HELP_FKEY) {
do_help();
break;
}
#endif
return t->val;
}
}
assert(0 <= x && x <= xend && xend == strlen(answer));
if (kbinput != '\t')
tabbed = 0;
switch (kbinput) {
/* Stuff we want to equate with <enter>, ASCII 13 */
case 343:
ungetch(13); /* Enter on iris-ansi $TERM, sometimes */
break;
/* Stuff we want to ignore */
#ifdef PDCURSES
case 541:
case 542:
case 543: /* Right ctrl again */
case 544:
case 545: /* Right alt again */
break;
#endif
#if !defined(DISABLE_MOUSE) && defined(NCURSES_MOUSE_VERSION)
case KEY_MOUSE:
do_mouse();
break;
#endif
case NANO_HOME_KEY:
case KEY_HOME:
x = 0;
break;
case NANO_END_KEY:
case KEY_END:
x = xend;
break;
case KEY_RIGHT:
case NANO_FORWARD_KEY:
if (x < xend)
x++;
break;
case NANO_CONTROL_D:
if (x < xend) {
memmove(answer + x, answer + x + 1, xend - x);
xend--;
}
break;
case NANO_CONTROL_K:
case NANO_CONTROL_U:
null_at(&answer, 0);
xend = 0;
x = 0;
break;
case KEY_BACKSPACE:
case 127:
case NANO_CONTROL_H:
if (x > 0) {
memmove(answer + x - 1, answer + x, xend - x + 1);
x--;
xend--;
}
break;
case NANO_CONTROL_I:
#ifndef NANO_SMALL
/* tab history completion */
if (history_list != NULL) {
if (!complete || last_kbinput != NANO_CONTROL_I) {
history_list->current = (historytype *)history_list;
history_list->len = strlen(answer);
}
if (history_list->len > 0) {
complete = get_history_completion(history_list, answer);
xend = strlen(complete);
x = xend;
answer = mallocstrcpy(answer, complete);
}
}
#ifndef DISABLE_TABCOMP
else
#endif
#endif
#ifndef DISABLE_TABCOMP
if (allowtabs) {
int shift = 0;
answer = input_tab(answer, x, &tabbed, &shift, list);
xend = strlen(answer);
x += shift;
if (x > xend)
x = xend;
}
#endif
break;
case KEY_LEFT:
case NANO_BACK_KEY:
if (x > 0)
x--;
break;
case KEY_UP:
case NANO_UP_KEY:
#ifndef NANO_SMALL
do_upkey:
if (history_list != NULL) {
/* If there's no previous temp holder, or if we already
arrowed back down to it and (possibly edited it),
update the holder */
if (currentbuf == NULL || (ret2cb == 1 && strcmp(currentbuf, answer))) {
currentbuf = mallocstrcpy(currentbuf, answer);
ret2cb = 0;
}
/* get older search from the history list */
if ((history = get_history_older(history_list)) != NULL) {
answer = mallocstrcpy(answer, history);
xend = strlen(history);
} else {
answer = mallocstrcpy(answer, "");
xend = 0;
}
x = xend;
}
#endif
break;
case KEY_DOWN:
case NANO_DOWN_KEY:
#ifndef NANO_SMALL
do_downkey:
if (history_list != NULL) {
/* get newer search from the history list */
if ((history = get_history_newer(history_list)) != NULL) {
answer = mallocstrcpy(answer, history);
xend = strlen(history);
/* else if we ran out of history, regurgitate the temporary
buffer and blow away currentbuf */
} else if (currentbuf != NULL) {
answer = mallocstrcpy(answer, currentbuf);
free(currentbuf);
currentbuf = NULL;
xend = strlen(answer);
ret2cb = 1;
} else {
answer = mallocstrcpy(answer, "");
xend = 0;
}
x = xend;
}
#endif
break;
case KEY_DC:
goto do_deletekey;
case 27:
switch (kbinput = wgetch(edit)) {
case 'O':
switch (kbinput = wgetch(edit)) {
case 'F':
x = xend;
break;
case 'H':
x = 0;
break;
}
break;
case '[':
switch (kbinput = wgetch(edit)) {
case 'A':
#ifndef NANO_SMALL
goto do_upkey;
#else
break;
#endif
case 'B':
#ifndef NANO_SMALL
goto do_downkey;
#else
break;
#endif
case 'C':
if (x < xend)
x++;
break;
case 'D':
if (x > 0)
x--;
break;
case '1':
case '7':
x = 0;
goto skip_tilde;
case '3':
do_deletekey:
if (x < xend) {
memmove(answer + x, answer + x + 1, xend - x);
xend--;
}
goto skip_tilde;
case '4':
case '8':
x = xend;
skip_tilde:
nodelay(edit, TRUE);
kbinput = wgetch(edit);
if (kbinput == '~' || kbinput == ERR)
kbinput = -1;
nodelay(edit, FALSE);
break;
}
break;
default:
for (t = s; t != NULL; t = t->next) {
#ifdef DEBUG
fprintf(stderr, _("Aha! \'%c\' (%d)\n"), kbinput,
kbinput);
#endif
if (kbinput == t->val || kbinput == t->val - 32)
/* We hit an Alt key. Do like above. We don't
just ungetch() the letter and let it get
caught above cause that screws the
keypad... */
return t->val;
}
}
break;
default:
if (kbinput < 32)
break;
answer = nrealloc(answer, xend + 2);
memmove(answer + x + 1, answer + x, xend - x + 1);
xend++;
answer[x] = kbinput;
x++;
#ifdef DEBUG
fprintf(stderr, _("input \'%c\' (%d)\n"), kbinput, kbinput);
#endif
} /* switch (kbinput) */
#ifndef NANO_SMALL
last_kbinput = kbinput;
#endif
nanoget_repaint(buf, answer, x);
wrefresh(bottomwin);
} /* while (kbinput ...) */
/* We finished putting in an answer; reset x */
x = -1;
/* Just check for a blank answer here */
if (answer[0] == '\0')
return -2;
else
return 0;
}
/* If modified is not already set, set it and update titlebar. */
void set_modified(void)
{
if (!ISSET(MODIFIED)) {
SET(MODIFIED);
titlebar(NULL);
wrefresh(topwin);
}
}
void titlebar(const char *path)
{
int namelen, space;
const char *what = path;
if (path == NULL)
what = filename;
wattron(topwin, A_REVERSE);
mvwaddstr(topwin, 0, 0, hblank);
mvwaddnstr(topwin, 0, 2, VERMSG, COLS - 3);
space = COLS - sizeof(VERMSG) - 22;
namelen = strlen(what);
if (space > 0) {
if (what[0] == '\0')
mvwaddnstr(topwin, 0, COLS / 2 - 6, _("New Buffer"),
COLS / 2 + COLS % 2 - 6);
else if (namelen > space) {
if (path == NULL)
waddstr(topwin, _(" File: ..."));
else
waddstr(topwin, _(" DIR: ..."));
waddstr(topwin, &what[namelen - space]);
} else {
if (path == NULL)
mvwaddstr(topwin, 0, COLS / 2 - (namelen / 2 + 1),
_("File: "));
else
mvwaddstr(topwin, 0, COLS / 2 - (namelen / 2 + 1),
_(" DIR: "));
waddstr(topwin, what);
}
} /* If we don't have space, we shouldn't bother */
if (ISSET(MODIFIED))
mvwaddnstr(topwin, 0, COLS - 11, _(" Modified "), 11);
else if (ISSET(VIEW_MODE))
mvwaddnstr(topwin, 0, COLS - 11, _(" View "), 11);
wattroff(topwin, A_REVERSE);
wrefresh(topwin);
reset_cursor();
}
void bottombars(const shortcut *s)
{
int i, j, numcols;
char keystr[9];
int slen;
if (ISSET(NO_HELP))
return;
if (s == main_list) {
slen = MAIN_VISIBLE;
assert(MAIN_VISIBLE <= length_of_list(s));
} else
slen = length_of_list(s);
/* There will be this many columns of shortcuts */
numcols = (slen + (slen % 2)) / 2;
blank_bottomwin();
for (i = 0; i < numcols; i++) {
for (j = 0; j <= 1; j++) {
wmove(bottomwin, 1 + j, i * (COLS / numcols));
/* Yucky sentinel values we can't handle a better way */
if (s->val == NANO_CONTROL_SPACE)
strcpy(keystr, "^ ");
#ifndef NANO_SMALL
else if (s->val == KEY_UP)
strncpy(keystr, _("Up"), 8);
#endif /* NANO_SMALL */
else if (s->val > 0) {
if (s->val < 64)
sprintf(keystr, "^%c", s->val + 64);
else
sprintf(keystr, "M-%c", s->val - 32);
} else if (s->altval > 0)
sprintf(keystr, "M-%c", s->altval);
onekey(keystr, s->desc, COLS / numcols);
s = s->next;
if (s == NULL)
goto break_completely_out;
}
}
break_completely_out:
wrefresh(bottomwin);
}
/* Write a shortcut key to the help area at the bottom of the window.
* keystroke is e.g. "^G" and desc is e.g. "Get Help".
* We are careful to write exactly len characters, even if len is
* very small and keystroke and desc are long. */
void onekey(const char *keystroke, const char *desc, int len)
{
wattron(bottomwin, A_REVERSE);
waddnstr(bottomwin, keystroke, len);
wattroff(bottomwin, A_REVERSE);
len -= strlen(keystroke);
if (len > 0) {
waddch(bottomwin, ' ');
len--;
waddnstr(bottomwin, desc, len);
len -= strlen(desc);
for (; len > 0; len--)
waddch(bottomwin, ' ');
}
}
/* And so start the display update routines. */
#ifndef NDEBUG
int check_linenumbers(const filestruct *fileptr)
{
int check_line = 0;
const filestruct *filetmp;
for (filetmp = edittop; filetmp != fileptr; filetmp = filetmp->next)
check_line++;
return check_line;
}
#endif
/* nano scrolls horizontally within a line in chunks. This function
* returns the column number of the first character displayed in the
* window when the cursor is at the given column. */
int get_page_start(int column)
{
assert(COLS > 9);
return column < COLS - 1 ? 0 : column - 7 - (column - 8) % (COLS - 9);
}
/* Resets current_y, based on the position of current, and puts the
* cursor at (current_y, current_x). */
void reset_cursor(void)
{
const filestruct *ptr = edittop;
size_t x;
/* Yuck. This condition can be true after open_file() when opening
* the first file. */
if (edittop == NULL)
return;
current_y = 0;
while (ptr != current && ptr != editbot && ptr->next != NULL) {
ptr = ptr->next;
current_y++;
}
x = xplustabs();
wmove(edit, current_y, x - get_page_start(x));
}
/* edit_add() takes care of the job of actually painting a line into
* the edit window. Called only from update_line(). Expects a
* converted-to-not-have-tabs line. */
void edit_add(const filestruct *fileptr, int yval, int start
#ifndef NANO_SMALL
, int virt_mark_beginx, int virt_cur_x
#endif
)
{
#ifdef DEBUG
fprintf(stderr, "Painting line %d, current is %d\n", fileptr->lineno,
current->lineno);
#endif
/* Just paint the string in any case (we'll add color or reverse on
just the text that needs it */
mvwaddnstr(edit, yval, 0, &fileptr->data[start], COLS);
#ifdef ENABLE_COLOR
if (colorstrings != NULL && ISSET(COLOR_SYNTAX)) {
const colortype *tmpcolor = colorstrings;
for (; tmpcolor != NULL; tmpcolor = tmpcolor->next) {
int x_start;
/* Starting column for mvwaddnstr. Zero-based. */
int paintlen;
/* number of chars to paint on this line. There are COLS
* characters on a whole line. */
regmatch_t startmatch; /* match position for start_regexp*/
regmatch_t endmatch; /* match position for end_regexp*/
if (tmpcolor->bright)
wattron(edit, A_BOLD);
wattron(edit, COLOR_PAIR(tmpcolor->pairnum));
/* Two notes about regexec. Return value 0 means there is a
* match. Also, rm_eo is the first non-matching character
* after the match. */
/* First case, tmpcolor is a single-line expression. */
if (tmpcolor->end == NULL) {
size_t k = 0;
/* We increment k by rm_eo, to move past the end of the
last match. Even though two matches may overlap, we
want to ignore them, so that we can highlight C-strings
correctly. */
while (k < start + COLS) {
/* Note the fifth parameter to regexec. It says not to
* match the beginning-of-line character unless
* k == 0. If regexec returns nonzero, there are no
* more matches in the line. */
if (regexec(&tmpcolor->start, &fileptr->data[k], 1,
&startmatch, k == 0 ? 0 : REG_NOTBOL))
break;
/* Translate the match to the beginning of the line. */
startmatch.rm_so += k;
startmatch.rm_eo += k;
if (startmatch.rm_so == startmatch.rm_eo) {
startmatch.rm_eo++;
statusbar(_("Refusing 0 length regex match"));
} else if (startmatch.rm_so < start + COLS &&
startmatch.rm_eo > start) {
x_start = startmatch.rm_so - start;
if (x_start < 0)
x_start = 0;
paintlen = startmatch.rm_eo - start - x_start;
if (paintlen > COLS - x_start)
paintlen = COLS - x_start;
assert(0 <= x_start && 0 < paintlen &&
x_start + paintlen <= COLS);
mvwaddnstr(edit, yval, x_start,
fileptr->data + start + x_start, paintlen);
}
k = startmatch.rm_eo;
}
} else {
/* This is a multi-line regexp. There are two steps.
* First, we have to see if the beginning of the line is
* colored by a start on an earlier line, and an end on
* this line or later.
*
* We find the first line before fileptr matching the
* start. If every match on that line is followed by an
* end, then go to step two. Otherwise, find the next line
* after start_line matching the end. If that line is not
* before fileptr, then paint the beginning of this line. */
const filestruct *start_line = fileptr->prev;
/* the first line before fileptr matching start*/
regoff_t start_col;
/* where it starts in that line */
const filestruct *end_line;
int searched_later_lines = 0;
/* Used in step 2. Have we looked for an end on
* lines after fileptr? */
while (start_line != NULL &&
regexec(&tmpcolor->start, start_line->data, 1,
&startmatch, 0)) {
/* If there is an end on this line, there is no need
* to look for starts on earlier lines. */
if (!regexec(tmpcolor->end, start_line->data, 1,
&endmatch, 0))
goto step_two;
start_line = start_line->prev;
}
/* No start found, so skip to the next step. */
if (start_line == NULL)
goto step_two;
/* Now start_line is the first line before fileptr
* containing a start match. Is there a start on this
* line not followed by an end on this line? */
start_col = 0;
while (1) {
start_col += startmatch.rm_so;
startmatch.rm_eo -= startmatch.rm_so;
if (regexec(tmpcolor->end,
start_line->data + start_col + startmatch.rm_eo,
1, &endmatch,
start_col + startmatch.rm_eo == 0 ? 0 : REG_NOTBOL))
/* No end found after this start */
break;
start_col++;
if (regexec(&tmpcolor->start,
start_line->data + start_col, 1, &startmatch,
REG_NOTBOL))
/* No later start on this line. */
goto step_two;
}
/* Indeed, there is a start not followed on this line by an
* end. */
/* We have already checked that there is no end before
* fileptr and after the start. Is there an end after
* the start at all? We don't paint unterminated starts. */
end_line = fileptr;
while (end_line != NULL &&
regexec(tmpcolor->end, end_line->data, 1, &endmatch, 0))
end_line = end_line->next;
/* No end found, or it is too early. */
if (end_line == NULL || end_line->lineno < fileptr->lineno ||
(end_line == fileptr && endmatch.rm_eo <= start))
goto step_two;
/* Now paint the start of fileptr. */
paintlen = end_line != fileptr
? COLS : endmatch.rm_eo - start;
if (paintlen > COLS)
paintlen = COLS;
assert(0 < paintlen && paintlen <= COLS);
mvwaddnstr(edit, yval, 0, fileptr->data + start, paintlen);
/* We have already painted the whole line. */
if (paintlen == COLS)
goto skip_step_two;
step_two: /* Second step, we look for starts on this line. */
start_col = 0;
while (start_col < start + COLS) {
if (regexec(&tmpcolor->start, fileptr->data + start_col, 1,
&startmatch, start_col == 0 ? 0 : REG_NOTBOL)
|| start_col + startmatch.rm_so >= start + COLS)
/* No more starts on this line. */
break;
/* Translate the match to be relative to the
* beginning of the line. */
startmatch.rm_so += start_col;
startmatch.rm_eo += start_col;
x_start = startmatch.rm_so - start;
if (x_start < 0) {
x_start = 0;
startmatch.rm_so = start;
}
if (!regexec(tmpcolor->end, fileptr->data + startmatch.rm_eo,
1, &endmatch,
startmatch.rm_eo == 0 ? 0 : REG_NOTBOL)) {
/* Translate the end match to be relative to the
beginning of the line. */
endmatch.rm_so += startmatch.rm_eo;
endmatch.rm_eo += startmatch.rm_eo;
/* There is an end on this line. But does it
appear on this page, and is the match more than
zero characters long? */
if (endmatch.rm_eo > start &&
endmatch.rm_eo > startmatch.rm_so) {
paintlen = endmatch.rm_eo - start - x_start;
if (x_start + paintlen > COLS)
paintlen = COLS - x_start;
assert(0 <= x_start && 0 < paintlen &&
x_start + paintlen <= COLS);
mvwaddnstr(edit, yval, x_start,
fileptr->data + start + x_start, paintlen);
}
} else if (!searched_later_lines) {
searched_later_lines = 1;
/* There is no end on this line. But we haven't
* yet looked for one on later lines. */
end_line = fileptr->next;
while (end_line != NULL && regexec(tmpcolor->end,
end_line->data, 1, &endmatch, 0))
end_line = end_line->next;
if (end_line != NULL) {
assert(0 <= x_start && x_start < COLS);
mvwaddnstr(edit, yval, x_start,
fileptr->data + start + x_start,
COLS - x_start);
/* We painted to the end of the line, so
* don't bother checking any more starts. */
break;
}
}
start_col = startmatch.rm_so + 1;
} /* while start_col < start + COLS */
} /* if (tmp_color->end != NULL) */
skip_step_two:
wattroff(edit, A_BOLD);
wattroff(edit, COLOR_PAIR(tmpcolor->pairnum));
} /* for tmpcolor in colorstrings */
}
#endif /* ENABLE_COLOR */
#ifndef NANO_SMALL
if (ISSET(MARK_ISSET)
&& (fileptr->lineno <= mark_beginbuf->lineno
|| fileptr->lineno <= current->lineno)
&& (fileptr->lineno >= mark_beginbuf->lineno
|| fileptr->lineno >= current->lineno)) {
/* fileptr is at least partially selected. */
int x_start;
/* Starting column for mvwaddnstr. Zero-based. */
int paintlen;
/* number of chars to paint on this line. There are COLS
* characters on a whole line. */
if (mark_beginbuf == fileptr && current == fileptr) {
x_start = virt_mark_beginx < virt_cur_x ? virt_mark_beginx
: virt_cur_x;
paintlen = abs(virt_mark_beginx - virt_cur_x);
} else {
if (mark_beginbuf->lineno < fileptr->lineno ||
current->lineno < fileptr->lineno)
x_start = 0;
else
x_start = mark_beginbuf == fileptr ? virt_mark_beginx
: virt_cur_x;
if (mark_beginbuf->lineno > fileptr->lineno ||
current->lineno > fileptr->lineno)
paintlen = start + COLS;
else
paintlen = mark_beginbuf == fileptr ? virt_mark_beginx
: virt_cur_x;
}
x_start -= start;
if (x_start < 0) {
paintlen += x_start;
x_start = 0;
}
if (x_start + paintlen > COLS)
paintlen = COLS - x_start;
if (paintlen > 0) {
wattron(edit, A_REVERSE);
assert(x_start >= 0 && paintlen > 0 && x_start + paintlen <= COLS);
mvwaddnstr(edit, yval, x_start,
fileptr->data + start + x_start, paintlen);
wattroff(edit, A_REVERSE);
}
}
#endif /* !NANO_SMALL */
}
/* Just update one line in the edit buffer. Basically a wrapper for
* edit_add(). If fileptr != current, then index is considered 0.
* The line will be displayed starting with fileptr->data[index].
* Likely args are current_x or 0. */
void update_line(filestruct *fileptr, int index)
{
int line;
/* line in the edit window for CURSES calls */
#ifndef NANO_SMALL
int virt_cur_x;
int virt_mark_beginx;
#endif
char *original;
/* The original string fileptr->data. */
char *converted;
/* fileptr->data converted to have tabs and control characters
* expanded. */
size_t pos;
size_t page_start;
if (fileptr == NULL)
return;
line = fileptr->lineno - edittop->lineno;
/* We assume the line numbers are valid. Is that really true? */
assert(line < 0 || line == check_linenumbers(fileptr));
if (line < 0 || line >= editwinrows)
return;
/* First, blank out the line (at a minimum) */
mvwaddstr(edit, line, 0, hblank);
original = fileptr->data;
converted = charalloc(strlenpt(original) + 1);
/* Next, convert all the tabs to spaces, so everything else is easy.
* Note the internal speller sends us index == -1. */
index = fileptr == current && index > 0 ? strnlenpt(original, index) : 0;
#ifndef NANO_SMALL
virt_cur_x = fileptr == current ? strnlenpt(original, current_x) : current_x;
virt_mark_beginx = fileptr == mark_beginbuf ? strnlenpt(original, mark_beginx) : mark_beginx;
#endif
pos = 0;
for (; *original != '\0'; original++) {
if (*original == '\t')
do {
converted[pos++] = ' ';
} while (pos % tabsize);
else if (is_cntrl_char(*original)) {
converted[pos++] = '^';
if (*original == 127)
converted[pos++] = '?';
else if (*original == '\n')
/* Treat newlines (ASCII 10's) embedded in a line as encoded
* nulls (ASCII 0's); the line in question should be run
* through unsunder() before reaching here */
converted[pos++] = '@';
else
converted[pos++] = *original + 64;
} else
converted[pos++] = *original;
}
converted[pos] = '\0';
/* Now, paint the line */
original = fileptr->data;
fileptr->data = converted;
page_start = get_page_start(index);
edit_add(fileptr, line, page_start
#ifndef NANO_SMALL
, virt_mark_beginx, virt_cur_x
#endif
);
free(converted);
fileptr->data = original;
if (page_start > 0)
mvwaddch(edit, line, 0, '$');
if (pos > page_start + COLS)
mvwaddch(edit, line, COLS - 1, '$');
}
/* This function updates current, based on where current_y is;
* reset_cursor() does the opposite. */
void update_cursor(void)
{
int i = 0;
#ifdef DEBUG
fprintf(stderr, _("Moved to (%d, %d) in edit buffer\n"), current_y,
current_x);
#endif
current = edittop;
while (i < current_y && current->next != NULL) {
current = current->next;
i++;
}
#ifdef DEBUG
fprintf(stderr, "current->data = \"%s\"\n", current->data);
#endif
}
void center_cursor(void)
{
current_y = editwinrows / 2;
wmove(edit, current_y, current_x);
}
/* Refresh the screen without changing the position of lines. */
void edit_refresh(void)
{
/* Neither of these conditions should occur, but they do. edittop is
* NULL when you open an existing file on the command line, and
* ENABLE_COLOR is defined. Yuck. */
if (current == NULL)
return;
if (edittop == NULL)
edittop = current;
if (current->lineno < edittop->lineno ||
current->lineno >= edittop->lineno + editwinrows)
/* Note that edit_update() changes edittop so that
* current->lineno = edittop->lineno + editwinrows / 2. Thus
* when it then calls edit_refresh(), there is no danger of
* getting an infinite loop. */
edit_update(current, CENTER);
else {
int nlines = 0;
/* Don't make the cursor jump around the screen whilst updating */
leaveok(edit, TRUE);
editbot = edittop;
while (nlines < editwinrows) {
update_line(editbot, current_x);
nlines++;
if (editbot->next == NULL)
break;
editbot = editbot->next;
}
while (nlines < editwinrows) {
mvwaddstr(edit, nlines, 0, hblank);
nlines++;
}
/* What the hell are we expecting to update the screen if this
isn't here? Luck? */
wrefresh(edit);
leaveok(edit, FALSE);
}
}
/* Same as above, but touch the window first, so everything is
* redrawn. */
void edit_refresh_clearok(void)
{
clearok(edit, TRUE);
edit_refresh();
clearok(edit, FALSE);
}
/*
* Nice generic routine to update the edit buffer, given a pointer to the
* file struct =)
*/
void edit_update(filestruct *fileptr, topmidbotnone location)
{
if (fileptr == NULL)
return;
if (location != TOP) {
int goal = location == NONE ? current_y - 1 : editwinrows / 2;
for (; goal >= 0 && fileptr->prev != NULL; goal--)
fileptr = fileptr->prev;
}
edittop = fileptr;
fix_editbot();
edit_refresh();
}
/*
* Ask a question on the statusbar. Answer will be stored in answer
* global. Returns -1 on aborted enter, -2 on a blank string, and 0
* otherwise, the valid shortcut key caught. Def is any editable text we
* want to put up by default.
*
* New arg tabs tells whether or not to allow tab completion.
*/
int statusq(int tabs, const shortcut *s, const char *def,
#ifndef NANO_SMALL
historyheadtype *which_history,
#endif
const char *msg, ...)
{
va_list ap;
char *foo = charalloc(COLS - 3);
int ret;
#ifndef DISABLE_TABCOMP
int list = 0;
#endif
bottombars(s);
va_start(ap, msg);
vsnprintf(foo, COLS - 4, msg, ap);
va_end(ap);
foo[COLS - 4] = '\0';
ret = nanogetstr(tabs, foo, def,
#ifndef NANO_SMALL
which_history,
#endif
s
#ifndef DISABLE_TABCOMP
, &list
#endif
);
free(foo);
resetstatuspos = 0;
switch (ret) {
case NANO_FIRSTLINE_KEY:
do_first_line();
resetstatuspos = 1;
break;
case NANO_LASTLINE_KEY:
do_last_line();
resetstatuspos = 1;
break;
case NANO_CANCEL_KEY:
ret = -1;
resetstatuspos = 1;
break;
}
blank_statusbar();
#ifdef DEBUG
fprintf(stderr, _("I got \"%s\"\n"), answer);
#endif
#ifndef DISABLE_TABCOMP
/* if we've done tab completion, there might be a list of
filename matches on the edit window at this point; make sure
they're cleared off */
if (list)
edit_refresh();
#endif
return ret;
}
/*
* Ask a simple yes/no question on the statusbar. Returns 1 for Y, 0
* for N, 2 for All (if all is nonzero when passed in) and -1 for abort
* (^C).
*/
int do_yesno(int all, int leavecursor, const char *msg, ...)
{
va_list ap;
char *foo;
int ok = -2;
const char *yesstr; /* String of yes characters accepted */
const char *nostr; /* Same for no */
const char *allstr; /* And all, surprise! */
/* Yes, no and all are strings of any length. Each string consists of
all characters accepted as a valid character for that value.
The first value will be the one displayed in the shortcuts. */
yesstr = _("Yy");
nostr = _("Nn");
allstr = _("Aa");
/* Remove gettext call for keybindings until we clear the thing up */
if (!ISSET(NO_HELP)) {
char shortstr[3]; /* Temp string for Y, N, A */
/* Write the bottom of the screen */
blank_bottombars();
sprintf(shortstr, " %c", yesstr[0]);
wmove(bottomwin, 1, 0);
onekey(shortstr, _("Yes"), 16);
if (all) {
wmove(bottomwin, 1, 16);
shortstr[1] = allstr[0];
onekey(shortstr, _("All"), 16);
}
wmove(bottomwin, 2, 0);
shortstr[1] = nostr[0];
onekey(shortstr, _("No"), 16);
wmove(bottomwin, 2, 16);
onekey("^C", _("Cancel"), 16);
}
foo = charalloc(COLS);
va_start(ap, msg);
vsnprintf(foo, COLS, msg, ap);
va_end(ap);
foo[COLS - 1] = '\0';
wattron(bottomwin, A_REVERSE);
blank_statusbar();
mvwaddstr(bottomwin, 0, 0, foo);
free(foo);
wattroff(bottomwin, A_REVERSE);
wrefresh(bottomwin);
do {
int kbinput = wgetch(edit);
#if !defined(DISABLE_MOUSE) && defined(NCURSES_MOUSE_VERSION)
MEVENT mevent;
#endif
if (kbinput == NANO_CONTROL_C)
ok = -1;
#if !defined(DISABLE_MOUSE) && defined(NCURSES_MOUSE_VERSION)
/* Look ma! We get to duplicate lots of code from do_mouse!! */
else if (kbinput == KEY_MOUSE && getmouse(&mevent) != ERR &&
wenclose(bottomwin, mevent.y, mevent.x) &&
!ISSET(NO_HELP) && mevent.x < 32 &&
mevent.y >= editwinrows + 3) {
int x = mevent.x /= 16;
/* Did we click in the first column of shortcuts, or the
second? */
int y = mevent.y - editwinrows - 3;
/* Did we click in the first row of shortcuts? */
assert(0 <= x && x <= 1 && 0 <= y && y <= 1);
/* x = 0 means they clicked Yes or No.
y = 0 means Yes or All. */
ok = -2 * x * y + x - y + 1;
if (ok == 2 && !all)
ok = -2;
}
#endif
/* Look for the kbinput in the yes, no and (optionally) all str */
else if (strchr(yesstr, kbinput) != NULL)
ok = 1;
else if (strchr(nostr, kbinput) != NULL)
ok = 0;
else if (all && strchr(allstr, kbinput) != NULL)
ok = 2;
} while (ok == -2);
/* Then blank the statusbar. */
blank_statusbar_refresh();
return ok;
}
int total_refresh(void)
{
clearok(edit, TRUE);
clearok(topwin, TRUE);
clearok(bottomwin, TRUE);
wnoutrefresh(edit);
wnoutrefresh(topwin);
wnoutrefresh(bottomwin);
doupdate();
clearok(edit, FALSE);
clearok(topwin, FALSE);
clearok(bottomwin, FALSE);
edit_refresh();
titlebar(NULL);
return 1;
}
void display_main_list(void)
{
bottombars(main_list);
}
void statusbar(const char *msg, ...)
{
va_list ap;
char *foo;
int start_x = 0;
size_t foo_len;
va_start(ap, msg);
/* Curses mode is turned off. If we use wmove() now, it will muck up
the terminal settings. So we just use vfprintf(). */
if (curses_ended) {
vfprintf(stderr, msg, ap);
va_end(ap);
return;
}
assert(COLS >= 4);
foo = charalloc(COLS - 3);
vsnprintf(foo, COLS - 3, msg, ap);
va_end(ap);
foo[COLS - 4] = '\0';
foo_len = strlen(foo);
start_x = (COLS - foo_len - 4) / 2;
/* Blank out line */
blank_statusbar();
wmove(bottomwin, 0, start_x);
wattron(bottomwin, A_REVERSE);
waddstr(bottomwin, "[ ");
waddstr(bottomwin, foo);
free(foo);
waddstr(bottomwin, " ]");
wattroff(bottomwin, A_REVERSE);
wrefresh(bottomwin);
SET(DISABLE_CURPOS);
statblank = 26;
}
/*
* If constant is false, the user typed ^C so we unconditionally display
* the cursor position. Otherwise, we display it only if the character
* position changed, and DISABLE_CURPOS is not set.
*
* If constant and DISABLE_CURPOS is set, we unset it and update old_i and
* old_totsize. That way, we leave the current statusbar alone, but next
* time we will display. */
int do_cursorpos(int constant)
{
const filestruct *fileptr;
unsigned long i = 0;
static unsigned long old_i = 0;
static long old_totsize = -1;
assert(current != NULL && fileage != NULL && totlines != 0);
if (old_totsize == -1)
old_totsize = totsize;
for (fileptr = fileage; fileptr != current; fileptr = fileptr->next) {
assert(fileptr != NULL);
i += strlen(fileptr->data) + 1;
}
i += current_x;
if (constant && ISSET(DISABLE_CURPOS)) {
UNSET(DISABLE_CURPOS);
old_i = i;
old_totsize = totsize;
return 0;
}
/* if constant is false, display the position on the statusbar
unconditionally; otherwise, only display the position when the
character values have changed */
if (!constant || old_i != i || old_totsize != totsize) {
unsigned long xpt = xplustabs() + 1;
unsigned long cur_len = strlenpt(current->data) + 1;
int linepct = 100 * current->lineno / totlines;
int colpct = 100 * xpt / cur_len;
int bytepct = totsize == 0 ? 0 : 100 * i / totsize;
statusbar(
_("line %ld/%ld (%d%%), col %lu/%lu (%d%%), char %lu/%ld (%d%%)"),
current->lineno, totlines, linepct,
xpt, cur_len, colpct,
i, totsize, bytepct);
UNSET(DISABLE_CURPOS);
}
old_i = i;
old_totsize = totsize;
reset_cursor();
return 0;
}
int do_cursorpos_void(void)
{
return do_cursorpos(0);
}
/* Calculate the next line of help_text, starting at ptr. */
int line_len(const char *ptr)
{
int j = 0;
while (*ptr != '\n' && *ptr != '\0' && j < COLS - 5) {
ptr++;
j++;
}
if (j == COLS - 5) {
/* Don't wrap at the first of two spaces following a period. */
if (*ptr == ' ' && *(ptr + 1) == ' ')
j++;
/* Don't print half a word if we've run out of space */
while (*ptr != ' ' && j > 0) {
ptr--;
j--;
}
/* Word longer than COLS - 5 chars just gets broken */
if (j == 0)
j = COLS - 5;
}
assert(j >= 0 && j <= COLS - 4 && (j > 0 || *ptr == '\n'));
return j;
}
/* Our shortcut-list-compliant help function, which is
* better than nothing, and dynamic! */
int do_help(void)
{
#ifndef DISABLE_HELP
int i, page = 0, kbinput = 0, no_more = 0, kp, kp2;
int no_help_flag = 0;
const shortcut *oldshortcut;
blank_edit();
curs_set(0);
wattroff(bottomwin, A_REVERSE);
blank_statusbar();
/* set help_text as the string to display */
help_init();
assert(help_text != NULL);
oldshortcut = currshortcut;
currshortcut = help_list;
kp = keypad_on(edit, 1);
kp2 = keypad_on(bottomwin, 1);
if (ISSET(NO_HELP)) {
/* Well, if we're going to do this, we should at least
do it the right way */
no_help_flag = 1;
UNSET(NO_HELP);
window_init();
bottombars(help_list);
} else
bottombars(help_list);
do {
const char *ptr = help_text;
switch (kbinput) {
#if !defined(DISABLE_MOUSE) && defined(NCURSES_MOUSE_VERSION)
case KEY_MOUSE:
do_mouse();
break;
#endif
case 27:
kbinput = wgetch(edit);
switch(kbinput) {
case '[':
kbinput = wgetch(edit);
switch(kbinput) {
case '5': /* Alt-[-5 = Page Up */
wgetch(edit);
goto do_pageupkey;
case 'V': /* Alt-[-V = Page Up in Hurd Console */
case 'I': /* Alt-[-I = Page Up - FreeBSD Console */
goto do_pageupkey;
case '6': /* Alt-[-6 = Page Down */
wgetch(edit);
goto do_pagedownkey;
case 'U': /* Alt-[-U = Page Down in Hurd Console */
case 'G': /* Alt-[-G = Page Down - FreeBSD Console */
goto do_pagedownkey;
}
break;
}
break;
case NANO_NEXTPAGE_KEY:
case NANO_NEXTPAGE_FKEY:
case KEY_NPAGE:
do_pagedownkey:
if (!no_more) {
blank_edit();
page++;
}
break;
case NANO_PREVPAGE_KEY:
case NANO_PREVPAGE_FKEY:
case KEY_PPAGE:
do_pageupkey:
if (page > 0) {
no_more = 0;
blank_edit();
page--;
}
break;
}
/* Calculate where in the text we should be, based on the page */
for (i = 1; i < page * (editwinrows - 1); i++) {
ptr += line_len(ptr);
if (*ptr == '\n')
ptr++;
}
for (i = 0; i < editwinrows && *ptr != '\0'; i++) {
int j = line_len(ptr);
mvwaddnstr(edit, i, 0, ptr, j);
ptr += j;
if (*ptr == '\n')
ptr++;
}
if (*ptr == '\0') {
no_more = 1;
continue;
}
} while ((kbinput = wgetch(edit)) != NANO_EXIT_KEY &&
kbinput != NANO_EXIT_FKEY);
currshortcut = oldshortcut;
if (no_help_flag) {
blank_bottombars();
wrefresh(bottomwin);
SET(NO_HELP);
window_init();
} else
bottombars(currshortcut);
curs_set(1);
edit_refresh();
kp = keypad_on(edit, kp);
kp2 = keypad_on(bottomwin, kp2);
/* The help_init() at the beginning allocated help_text, which has
now been written to screen. */
free(help_text);
help_text = NULL;
#elif defined(DISABLE_HELP)
nano_disabled_msg();
#endif
return 1;
}
int keypad_on(WINDOW *win, int newval)
{
/* This is taken right from aumix. Don't sue me. */
#ifdef HAVE_USEKEYPAD
int old = win->_use_keypad;
keypad(win, newval);
return old;
#else
keypad(win, newval);
return 1;
#endif /* HAVE_USEKEYPAD */
}
/* Highlight the current word being replaced or spell checked. */
void do_replace_highlight(int highlight_flag, const char *word)
{
char *highlight_word = NULL;
int x, y, word_len;
highlight_word =
mallocstrcpy(highlight_word, &current->data[current_x]);
#ifdef HAVE_REGEX_H
if (ISSET(USE_REGEXP))
/* if we're using regexps, the highlight is the length of the
search result, not the length of the regexp string */
word_len = regmatches[0].rm_eo - regmatches[0].rm_so;
else
#endif
word_len = strlen(word);
highlight_word[word_len] = '\0';
/* adjust output when word extends beyond screen */
x = xplustabs();
y = get_page_start(x) + COLS;
if ((COLS - (y - x) + word_len) > COLS) {
highlight_word[y - x - 1] = '$';
highlight_word[y - x] = '\0';
}
/* OK display the output */
reset_cursor();
if (highlight_flag)
wattron(edit, A_REVERSE);
waddstr(edit, highlight_word);
if (highlight_flag)
wattroff(edit, A_REVERSE);
free(highlight_word);
}
/* Fix editbot, based on the assumption that edittop is correct. */
void fix_editbot(void)
{
int i;
editbot = edittop;
for (i = 0; i < editwinrows && editbot->next != NULL; i++)
editbot = editbot->next;
}
#ifdef DEBUG
/* Dump the current file structure to stderr */
void dump_buffer(const filestruct *inptr) {
if (inptr == fileage)
fprintf(stderr, _("Dumping file buffer to stderr...\n"));
else if (inptr == cutbuffer)
fprintf(stderr, _("Dumping cutbuffer to stderr...\n"));
else
fprintf(stderr, _("Dumping a buffer to stderr...\n"));
while (inptr != NULL) {
fprintf(stderr, "(%d) %s\n", inptr->lineno, inptr->data);
inptr = inptr->next;
}
}
#endif /* DEBUG */
#ifdef DEBUG
void dump_buffer_reverse(void) {
const filestruct *fileptr = filebot;
while (fileptr != NULL) {
fprintf(stderr, "(%d) %s\n", fileptr->lineno, fileptr->data);
fileptr = fileptr->prev;
}
}
#endif /* DEBUG */
#ifdef NANO_EXTRA
#define CREDIT_LEN 53
#define XLCREDIT_LEN 8
void do_credits(void)
{
int i, j = 0, k, place = 0, start_x;
const char *what;
const char *xlcredits[XLCREDIT_LEN];
const char *credits[CREDIT_LEN] = {
"0", /* "The nano text editor" */
"1", /* "version" */
VERSION,
"",
"2", /* "Brought to you by:" */
"Chris Allegretta",
"Jordi Mallach",
"Adam Rogoyski",
"Rob Siemborski",
"Rocco Corsi",
"David Lawrence Ramsey",
"David Benbennick",
"Ken Tyler",
"Sven Guckes",
"Florian K<>nig",
"Pauli Virtanen",
"Daniele Medri",
"Clement Laforet",
"Tedi Heriyanto",
"Bill Soudan",
"Christian Weisgerber",
"Erik Andersen",
"Big Gaute",
"Joshua Jensen",
"Ryan Krebs",
"Albert Chin",
"",
"3", /* "Special thanks to:" */
"Plattsburgh State University",
"Benet Laboratories",
"Amy Allegretta",
"Linda Young",
"Jeremy Robichaud",
"Richard Kolb II",
"4", /* "The Free Software Foundation" */
"Linus Torvalds",
"5", /* "For ncurses:" */
"Thomas Dickey",
"Pavel Curtis",
"Zeyd Ben-Halim",
"Eric S. Raymond",
"6", /* "and anyone else we forgot..." */
"7", /* "Thank you for using nano!\n" */
"", "", "", "",
"(c) 1999-2002 Chris Allegretta",
"", "", "", "",
"http://www.nano-editor.org/"
};
xlcredits[0] = _("The nano text editor");
xlcredits[1] = _("version ");
xlcredits[2] = _("Brought to you by:");
xlcredits[3] = _("Special thanks to:");
xlcredits[4] = _("The Free Software Foundation");
xlcredits[5] = _("For ncurses:");
xlcredits[6] = _("and anyone else we forgot...");
xlcredits[7] = _("Thank you for using nano!\n");
curs_set(0);
nodelay(edit, TRUE);
blank_bottombars();
mvwaddstr(topwin, 0, 0, hblank);
blank_edit();
wrefresh(edit);
wrefresh(bottomwin);
wrefresh(topwin);
while (wgetch(edit) == ERR) {
for (k = 0; k <= 1; k++) {
blank_edit();
for (i = editwinrows / 2 - 1; i >= (editwinrows / 2 - 1 - j);
i--) {
mvwaddstr(edit, i * 2 - k, 0, hblank);
if (place - (editwinrows / 2 - 1 - i) < CREDIT_LEN) {
what = credits[place - (editwinrows / 2 - 1 - i)];
/* God I've missed hacking. If what is exactly
1 char long, it's a sentinel for a translated
string, so use that instead. This means no
thanking people with 1 character long names ;-) */
if (strlen(what) == 1)
what = xlcredits[atoi(what)];
} else
what = "";
start_x = COLS / 2 - strlen(what) / 2 - 1;
mvwaddstr(edit, i * 2 - k, start_x, what);
}
usleep(700000);
wrefresh(edit);
}
if (j < editwinrows / 2 - 1)
j++;
place++;
if (place >= CREDIT_LEN + editwinrows / 2)
break;
}
nodelay(edit, FALSE);
curs_set(1);
display_main_list();
total_refresh();
}
#endif
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