smol/winio.c

/* $Id$ */
/**************************************************************************
 *   winio.c                                                              *
 *                                                                        *
 *   Copyright (C) 1999-2002 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"

#ifdef ENABLE_NLS
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif

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;
}


/* Like xplustabs, but for a specific index of a specific filestruct */
int xpt(const filestruct *fileptr, int index)
{
    int i, tabs = 0;

    if (fileptr == NULL || fileptr->data == NULL)
	return 0;

    for (i = 0; i < index && fileptr->data[i] != 0; i++) {
	tabs++;

	if (fileptr->data[i] == NANO_CONTROL_I) {
	    if (tabs % tabsize == 0);
	    else
		tabs += tabsize - (tabs % tabsize);
	} else if (is_cntrl_char((int)fileptr->data[i]))
	    tabs++;
	else if (fileptr->data[i] & 0x80)
	    /* Make 8 bit chars only 1 column! */
	    ;
    }

    return tabs;
}

/* 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,
		const shortcut *s
#ifndef DISABLE_TABCOMP
		, int *list
#endif
		)
{
    int kbinput;
    int x;
	/* the cursor position in 'answer' */
    int xend;
	/* length of 'answer', the status bar text */
    int tabbed = 0;
	/* used by input_tab() */
    const shortcut *t;

    xend = strlen(def);
    x = xend;
    answer = (char *)nrealloc(answer, xend + 1);
    if (xend > 0)
	strcpy(answer, def);
    else
	answer[0] = '\0';

#if !defined(DISABLE_HELP) || !defined(DISABLE_MOUSE)
    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
#ifndef DISABLE_MOUSE
#ifdef NCURSES_MOUSE_VERSION
	case KEY_MOUSE:
	    do_mouse();
	    break;
#endif
#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;
#ifndef DISABLE_TABCOMP
	case NANO_CONTROL_I:
	    if (allowtabs) {
		int shift = 0;

		answer = input_tab(answer, x, &tabbed, &shift, list);
		xend = strlen(answer);
		x += shift;
		if (x > xend)
		    x = xend;
	    }
	    break;
#endif
	case KEY_LEFT:
	case NANO_BACK_KEY:
	    if (x > 0)
		x--;
	    break;
	case KEY_UP:
	case KEY_DOWN:
	    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 '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;
		    goto skip_tilde;
		  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
	}
	nanoget_repaint(buf, answer, x);
	wrefresh(bottomwin);
    } /* while (kbinput ...) */

    /* In Pico mode, just check for a blank answer here */
    if (ISSET(PICO_MODE) && 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[4];
    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));

#ifndef NANO_SMALL
	    if (s->val == NANO_CONTROL_SPACE)
		strcpy(keystr, "^ ");
	    else
#endif /* !NANO_SMALL */
	    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.  Given a column, this
 * returns the "page" it is on.  "page", in the case of the display
 * columns, means which set of 80 characters is viewable (e.g. page 1
 * shows from 1 to COLS). */
int get_page_from_virtual(int virtual)
{
    int page = 2;

    if (virtual <= COLS - 2)
	return 1;
    virtual -= (COLS - 2);

    while (virtual > COLS - 2 - 7) {
	virtual -= (COLS - 2 - 7);
	page++;
    }

    return page;
}

/* The inverse of the above function */
int get_page_start_virtual(int page)
{
    int virtual;
    virtual = --page * (COLS - 7);
    if (page)
	virtual -= 2 * page - 1;
    return virtual;
}

int get_page_end_virtual(int page)
{
    return get_page_start_virtual(page) + COLS - 1;
}

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));
}

#ifndef NANO_SMALL
/* This takes care of the case where there is a mark that covers only
 * the current line.  It expects a line with no tab characters (i.e.
 * the type that edit_add() deals with. */
void add_marked_sameline(int begin, int end, filestruct *fileptr, int y,
			 int virt_cur_x, int this_page)
{
    /*
     * The general idea is to break the line up into 3 sections: before
     * the mark, the mark, and after the mark.  We then paint each in
     * turn (for those that are currently visible, of course)
     *
     * 3 start points: 0 -> begin, begin->end, end->strlen(data)
     *    in data    :    pre          sel           post        
     */
    int this_page_start = get_page_start_virtual(this_page),
	this_page_end = get_page_end_virtual(this_page);

    /* likewise, 3 data lengths */
    int pre_data_len = begin, sel_data_len = end - begin, post_data_len = 0;	/* Determined from the other two */

    /* now fix the start locations & lengths according to the cursor's 
     * position (i.e.: our page) */
    if (pre_data_len < this_page_start)
	pre_data_len = 0;
    else
	pre_data_len -= this_page_start;

    if (begin < this_page_start)
	begin = this_page_start;

    if (end < this_page_start)
	end = this_page_start;

    if (begin > this_page_end)
	begin = this_page_end;

    if (end > this_page_end)
	end = this_page_end;

    /* Now calculate the lengths */
    sel_data_len = end - begin;
    post_data_len = this_page_end - end;

    wattron(edit, A_REVERSE);
    mvwaddnstr(edit, y, begin - this_page_start,
	       &fileptr->data[begin], sel_data_len);

    wattroff(edit, A_REVERSE);

}
#endif

/* 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(filestruct *fileptr, int yval, int start, int virt_cur_x,
	      int virt_mark_beginx, int this_page)
{

#ifdef ENABLE_COLOR
    const colortype *tmpcolor = NULL;
    int k, paintlen;
    filestruct *e, *s;
    regoff_t ematch, smatch;
#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],
	       get_page_end_virtual(this_page) - start + 1);

#ifdef ENABLE_COLOR
    if (colorstrings != NULL)
	for (tmpcolor = colorstrings; tmpcolor != NULL;
	     tmpcolor = tmpcolor->next) {

	    if (tmpcolor->end == NULL) {

		/* First, highlight all single-line regexes */
		k = start;
		regcomp(&color_regexp, tmpcolor->start, REG_EXTENDED);
		while (!regexec(&color_regexp, &fileptr->data[k], 1,
				colormatches, 0)) {

		    if (colormatches[0].rm_eo - colormatches[0].rm_so < 1) {
			statusbar(_("Refusing 0 length regex match"));
			break;
		    }
#ifdef DEBUG
		    fprintf(stderr, _("Match! (%d chars) \"%s\"\n"),
			    colormatches[0].rm_eo - colormatches[0].rm_so,
			    &fileptr->data[k + colormatches[0].rm_so]);
#endif
		    if (colormatches[0].rm_so < COLS - 1) {
			if (tmpcolor->bright)
			    wattron(edit, A_BOLD);
			wattron(edit, COLOR_PAIR(tmpcolor->pairnum));

			if (colormatches[0].rm_eo + k <= COLS) {
			    paintlen =
				colormatches[0].rm_eo - colormatches[0].rm_so;
#ifdef DEBUG
			    fprintf(stderr, _("paintlen (%d) = eo (%d) - so (%d)\n"), 
				paintlen, colormatches[0].rm_eo, colormatches[0].rm_so);
#endif

			}
			else {
			    paintlen = COLS - k - colormatches[0].rm_so - 1;
#ifdef DEBUG
			    fprintf(stderr, _("paintlen (%d) = COLS (%d) - k (%d), - rm.so (%d) - 1\n"), 
					paintlen, COLS, k, colormatches[0].rm_so);
#endif
			}

			mvwaddnstr(edit, yval, colormatches[0].rm_so + k,
				   &fileptr->data[k + colormatches[0].rm_so],
				   paintlen);

		    }

		    if (tmpcolor->bright)
			wattroff(edit, A_BOLD);
		    wattroff(edit, COLOR_PAIR(tmpcolor->pairnum));

		    k += colormatches[0].rm_eo;

		}
		regfree(&color_regexp);

	    }
	    /* Now, if there's an 'end' somewhere below, and a 'start'
	       somewhere above, things get really fun.  We have to look
	       down for an end, make sure there's not a start before 
	       the end after us, and then look up for a start, 
	       and see if there's an end after the start, before us :) */
	    else {

		s = fileptr;
		while (s != NULL) {
		    regcomp(&color_regexp, tmpcolor->start, REG_EXTENDED);
		    if (!regexec
			(&color_regexp, s->data, 1, colormatches, 0)) {
			regfree(&color_regexp);
			break;
		    }
		    s = s->prev;
		    regfree(&color_regexp);
		}

		if (s != NULL) {
		    /* We found a start, mark it */
		    smatch = colormatches[0].rm_so;

		    e = s;
		    while (e != NULL && e != fileptr) {
			regcomp(&color_regexp, tmpcolor->end, REG_EXTENDED);
			if (!regexec
			    (&color_regexp, e->data, 1, colormatches, 0)) {
			    regfree(&color_regexp);
			    break;
			}
			e = e->next;
			regfree(&color_regexp);
		    }

		    if (e != fileptr)
			continue;	/* There's an end before us */
		    else {	/* Keep looking for an end */
			while (e != NULL) {
			    regcomp(&color_regexp, tmpcolor->end, REG_EXTENDED);
			    if (!regexec
				(&color_regexp, e->data, 1, colormatches,
				 0)) {
				regfree(&color_regexp);
				break;
			    }
			    e = e->next;
			    regfree(&color_regexp);
			}

			if (e == NULL)
			    continue;	/* There's no start before the end :) */
			else {	/* Okay, we found an end, mark it! */
			    ematch = colormatches[0].rm_eo;

			    while (e != NULL) {
				regcomp(&color_regexp, tmpcolor->end, REG_EXTENDED);
				if (!regexec
				    (&color_regexp, e->data, 1,
				     colormatches, 0)) {
				    regfree(&color_regexp);
				    break;
				} e = e->next;
				regfree(&color_regexp);
			    }

			    if (e == NULL)
				continue;	/* No end, oh well :) */

			    /* Didn't find another end, we must be in the 
			       middle of a highlighted bit */

			    if (tmpcolor->bright)
				wattron(edit, A_BOLD);

			    wattron(edit, COLOR_PAIR(tmpcolor->pairnum));

			    if (s == fileptr && e == fileptr && ematch < COLS) {
				mvwaddnstr(edit, yval, start + smatch, 
					&fileptr->data[start + smatch],
					ematch - smatch);
#ifdef DEBUG
			fprintf(stderr, _("start = %d, smatch = %d, ematch = %d\n"), start,
				smatch, ematch);
#endif

		    	    } else if (s == fileptr)
				mvwaddnstr(edit, yval, start + smatch, 
					&fileptr->data[start + smatch],
					COLS - smatch);
			    else if (e == fileptr)
				mvwaddnstr(edit, yval, start, 
					&fileptr->data[start],
					COLS - start);
			    else
				mvwaddnstr(edit, yval, start, 
					&fileptr->data[start],
					COLS);

			    if (tmpcolor->bright)
				wattroff(edit, A_BOLD);

			    wattroff(edit, COLOR_PAIR(tmpcolor->pairnum));

			}

		    }

		    /* Else go to the next string, yahoo! =) */
		}

	    }

	}

#endif				/* ENABLE_COLOR */
#ifndef NANO_SMALL

    /* There are quite a few cases that could take place; we'll deal
     * with them each in turn */
    if (ISSET(MARK_ISSET) &&
	!((fileptr->lineno > mark_beginbuf->lineno
	   && fileptr->lineno > current->lineno)
	  || (fileptr->lineno < mark_beginbuf->lineno
	      && fileptr->lineno < current->lineno))) {
	/* If we get here we are on a line that is at least
	 * partially selected.  The lineno checks above determined
	 * that */
	if (fileptr != mark_beginbuf && fileptr != current) {
	    /* We are on a completely marked line, paint it all
	     * inverse */

	    wattron(edit, A_REVERSE);

	    mvwaddnstr(edit, yval, 0, fileptr->data, COLS);

	    wattroff(edit, A_REVERSE);

	} else if (fileptr == mark_beginbuf && fileptr == current) {
	    /* Special case, we're still on the same line we started
	     * marking -- so we call our helper function */
	    if (virt_cur_x < virt_mark_beginx) {
		/* To the right of us is marked */
		add_marked_sameline(virt_cur_x, virt_mark_beginx,
				    fileptr, yval, virt_cur_x, this_page);
	    } else {
		/* To the left of us is marked */
		add_marked_sameline(virt_mark_beginx, virt_cur_x,
				    fileptr, yval, virt_cur_x, this_page);
	    }
	} else if (fileptr == mark_beginbuf) {
	    /*
	     * We're updating the line that was first marked,
	     * but we're not currently on it.  So we want to
	     * figure out which half to invert based on our
	     * relative line numbers.
	     *
	     * I.e. if we're above the "beginbuf" line, we want to
	     * mark the left side.  Otherwise, we're below, so we
	     * mark the right.
	     */
	    int target;

	    if (mark_beginbuf->lineno > current->lineno) {

		wattron(edit, A_REVERSE);

		target =
		    (virt_mark_beginx <
		     COLS - 1) ? virt_mark_beginx : COLS - 1;

		mvwaddnstr(edit, yval, 0, fileptr->data, target);

		wattroff(edit, A_REVERSE);

	    }

	    if (mark_beginbuf->lineno < current->lineno) {

		wattron(edit, A_REVERSE);
		target = (COLS - 1) - virt_mark_beginx;

		if (target < 0)
		    target = 0;

		mvwaddnstr(edit, yval, virt_mark_beginx,
			   &fileptr->data[virt_mark_beginx], target);

		wattroff(edit, A_REVERSE);
	    }

	} else if (fileptr == current) {
	    /* We're on the cursor's line, but it's not the first
	     * one we marked.  Similar to the previous logic. */
	    int this_page_start = get_page_start_virtual(this_page),
		this_page_end = get_page_end_virtual(this_page);

	    if (mark_beginbuf->lineno < current->lineno) {

		wattron(edit, A_REVERSE);

		if (virt_cur_x > COLS - 2) {
		    mvwaddnstr(edit, yval, 0,
			       &fileptr->data[this_page_start],
			       virt_cur_x - this_page_start);
		} else
		    mvwaddnstr(edit, yval, 0, fileptr->data, virt_cur_x);

		wattroff(edit, A_REVERSE);

	    }

	    if (mark_beginbuf->lineno > current->lineno) {

		wattron(edit, A_REVERSE);
		if (virt_cur_x > COLS - 2)
		    mvwaddnstr(edit, yval, virt_cur_x - this_page_start,
			       &fileptr->data[virt_cur_x],
			       this_page_end - virt_cur_x);
		else
		    mvwaddnstr(edit, yval, virt_cur_x,
			       &fileptr->data[virt_cur_x],
			       COLS - virt_cur_x);

		wattroff(edit, A_REVERSE);

	    }
	}
    }
#endif

}

/*
 * Just update one line in the edit buffer.  Basically a wrapper for
 * edit_add().  index gives us a place in the string to update starting
 * from.  Likely args are current_x or 0.
 */
void update_line(filestruct *fileptr, int index)
{
    filestruct *filetmp;
    int line = 0, col = 0;
    int virt_cur_x = current_x, virt_mark_beginx = mark_beginx;
    char *realdata, *tmp;
    int i, pos, len, page;

    if (!fileptr)
	return;

    /* First, blank out the line (at a minimum) */
    for (filetmp = edittop; filetmp != fileptr && filetmp != editbot;
	 filetmp = filetmp->next)
	line++;

    mvwaddstr(edit, line, 0, hblank);

    /* Next, convert all the tabs to spaces, so everything else is easy */
    index = xpt(fileptr, index);

    realdata = fileptr->data;
    len = strlen(realdata);
    fileptr->data = charalloc(xpt(fileptr, len) + 1);

    pos = 0;
    for (i = 0; i < len; i++) {
	if (realdata[i] == '\t') {
	    do {
		fileptr->data[pos++] = ' ';
		if (i < current_x)
		    virt_cur_x++;
		if (i < mark_beginx)
		    virt_mark_beginx++;
	    } while (pos % tabsize);
	    /* must decrement once to account for tab-is-one-character */
	    if (i < current_x)
		virt_cur_x--;
	    if (i < mark_beginx)
		virt_mark_beginx--;
	} else if (realdata[i] == 127) {
	    /* Treat delete characters (ASCII 127's) as ^?'s */
	    fileptr->data[pos++] = '^';
	    fileptr->data[pos++] = '?';
	    if (i < current_x)
		virt_cur_x++;
	    if (i < mark_beginx)
		virt_mark_beginx++;
	} else if (realdata[i] == 10) {
	    /* 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 */
	    fileptr->data[pos++] = '^';
	    fileptr->data[pos++] = '@';
	    if (i < current_x)
		virt_cur_x++;
	    if (i < mark_beginx)
		virt_mark_beginx++;
	} else if (is_cntrl_char(realdata[i])) {
	    /* Treat control characters as ^symbol's */
	    fileptr->data[pos++] = '^';
	    fileptr->data[pos++] = realdata[i] + 64;
	    if (i < current_x)
		virt_cur_x++;
	    if (i < mark_beginx)
		virt_mark_beginx++;
	} else {
	    fileptr->data[pos++] = realdata[i];
	}
    }

    fileptr->data[pos] = '\0';

    /* Now, paint the line */
    if (current == fileptr && index > COLS - 2) {
	/* This handles when the current line is beyond COLS */
	/* It requires figuring out what page we're on      */
	page = get_page_from_virtual(index);
	col = get_page_start_virtual(page);

	edit_add(filetmp, line, col, virt_cur_x, virt_mark_beginx, page);
	mvwaddch(edit, line, 0, '$');

	if (strlenpt(fileptr->data) > get_page_end_virtual(page) + 1)
	    mvwaddch(edit, line, COLS - 1, '$');
    } else {
	/* It's not the current line means that it's at x=0 and page=1 */
	/* If it is the current line, then we're in the same boat      */
	edit_add(filetmp, line, 0, virt_cur_x, virt_mark_beginx, 1);

	if (strlenpt(&filetmp->data[col]) > COLS)
	    mvwaddch(edit, line, COLS - 1, '$');
    }

    /* Clean up our mess */
    tmp = fileptr->data;
    fileptr->data = realdata;
    free(tmp);
}

/* 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)
{
    static int noloop = 0;
    int nlines = 0, currentcheck = 0;

    /* 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;

    editbot = edittop;
    while (nlines < editwinrows) {
	update_line(editbot, current_x);
	if (editbot == current)
	    currentcheck = 1;

	nlines++;

	if (editbot->next == NULL)
	    break;
	editbot = editbot->next;
    }
    /* If noloop == 1, then we already did an edit_update without finishing
       this function.  So we don't run edit_update again */
    if (!currentcheck && !noloop) {
		/* Then current has run off the screen... */
	edit_update(current, CENTER);
	noloop = 1;
    } else if (noloop)
	noloop = 0;

    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);
}

/*
 * 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,
		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';

#ifndef DISABLE_TABCOMP
    ret = nanogetstr(tabs, foo, def, s, &list);
#else
    ret = nanogetstr(tabs, foo, def, s);
#endif
    free(foo);

    switch (ret) {
    case NANO_FIRSTLINE_KEY:
	do_first_line();
	break;
    case NANO_LASTLINE_KEY:
	do_last_line();
	break;
    case NANO_CANCEL_KEY:
	ret = -1;
	break;
    default:
	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 non-zero when passed in) and -1 for
 * abort (^C).
 */
int do_yesno(int all, int leavecursor, const char *msg, ...)
{
    va_list ap;
    char foo[133];
    int kbinput, ok = -1, i;
    const char *yesstr;		/* String of yes characters accepted */
    const char *nostr;		/* Same for no */
    const char *allstr;		/* And all, surprise! */
#ifndef DISABLE_MOUSE
#ifdef NCURSES_MOUSE_VERSION
    MEVENT mevent;
#endif
#endif

    /* 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");

    /* Write the bottom of the screen */
    blank_bottomwin();

    /* Remove gettext call for keybindings until we clear the thing up */
    if (!ISSET(NO_HELP)) {
	char shortstr[3];		/* Temp string for Y, N, A */

	wmove(bottomwin, 1, 0);

	sprintf(shortstr, " %c", yesstr[0]);
	onekey(shortstr, _("Yes"), 16);

	if (all) {
	    shortstr[1] = allstr[0];
	    onekey(shortstr, _("All"), 16);
	}
	wmove(bottomwin, 2, 0);

	shortstr[1] = nostr[0];
	onekey(shortstr, _("No"), 16);

	onekey("^C", _("Cancel"), 16);
    }
    va_start(ap, msg);
    vsnprintf(foo, 132, msg, ap);
    va_end(ap);

    wattron(bottomwin, A_REVERSE);

    blank_statusbar();
    mvwaddstr(bottomwin, 0, 0, foo);

    wattroff(bottomwin, A_REVERSE);

    wrefresh(bottomwin);

    if (leavecursor == 1)
	reset_cursor();

    while (ok == -1) {
	kbinput = wgetch(edit);

	switch (kbinput) {
#ifndef DISABLE_MOUSE
#ifdef NCURSES_MOUSE_VERSION
	case KEY_MOUSE:

	    /* Look ma!  We get to duplicate lots of code from do_mouse!! */
	    if (getmouse(&mevent) == ERR)
		break;
	    if (!wenclose(bottomwin, mevent.y, mevent.x) || ISSET(NO_HELP))
		break;
	    mevent.y -= editwinrows + 3;
	    if (mevent.y < 0)
		break;
	    else {

		/* Rather than a bunch of if statements, set up a matrix
		   of possible return keystrokes based on the x and y
		   values */ 
		char yesnosquare[2][2];
		yesnosquare[0][0] = yesstr[0];
		if (all)
		    yesnosquare[0][1] = allstr[0];
		else
		    yesnosquare[0][1] = '\0';
		yesnosquare[1][0] = nostr[0];
		yesnosquare[1][1] = NANO_CONTROL_C;
		ungetch(yesnosquare[mevent.y][mevent.x / (COLS / 6)]);
	    }
	    break;
#endif
#endif
	case NANO_CONTROL_C:
	    ok = -2;
	    break;
	default:

	    /* Look for the kbinput in the yes, no and (optimally) all str */
	    for (i = 0; yesstr[i] != 0 && yesstr[i] != kbinput; i++);
	    if (yesstr[i] != 0) {
		ok = 1;
		break;
	    }

	    for (i = 0; nostr[i] != 0 && nostr[i] != kbinput; i++);
	    if (nostr[i] != 0) {
		ok = 0;
		break;
	    }

	    if (all) {
		for (i = 0; allstr[i] != 0 && allstr[i] != kbinput; i++);
		if (allstr[i] != 0) {
		    ok = 2;
		    break;
		}
	    }
	}
    }

    /* Then blank the screen */
    blank_statusbar_refresh();

    if (ok == -2)
	return -1;
    else
	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;

    assert(COLS >= 4);
    foo = charalloc(COLS - 3);

    va_start(ap, msg);
    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);

    if (ISSET(CONSTUPDATE))
	statblank = 1;
    else
	statblank = 25;
}

int do_cursorpos(int constant)
{
    filestruct *fileptr;
    float linepct = 0.0, bytepct = 0.0, colpct = 0.0;
    long i = 0, j = 0;
    static long old_i = -1, old_totsize = -1;

    if (current == NULL || fileage == NULL)
	return 0;

    if (old_i == -1)
	old_i = i;

    if (old_totsize == -1)
	old_totsize = totsize;

    colpct = 100 * (xplustabs() + 1) / (strlenpt(current->data) + 1);

    for (fileptr = fileage; fileptr != current && fileptr != NULL;
	 fileptr = fileptr->next)
	i += strlen(fileptr->data) + 1;

    if (fileptr == NULL)
	return -1;

    i += current_x;

    j = totsize;

    if (totsize > 0)
	bytepct = 100 * i / totsize;

    if (totlines > 0)
	 linepct = 100 * current->lineno / totlines;

#ifdef DEBUG
    fprintf(stderr, _("do_cursorpos: linepct = %f, bytepct = %f\n"),
	    linepct, bytepct);
#endif

    /* if constant is zero, 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)) {
	statusbar(_
		  ("line %d/%d (%.0f%%), col %ld/%ld (%.0f%%), char %ld/%ld (%.0f%%)"),
		  current->lineno, totlines, linepct, xplustabs() + 1, 
		  strlenpt(current->data) + 1, colpct, i, j, bytepct);
    }

    old_i = i;
    old_totsize = totsize;

    reset_cursor();
    return 1;
}

int do_cursorpos_void(void)
{
    return do_cursorpos(0);
}

/* Our shortcut-list-compliant help function, which is
 * better than nothing, and dynamic! */
int do_help(void)
{
#ifndef DISABLE_HELP
    int i, j, row = 0, page = 1, 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) {
#ifndef DISABLE_MOUSE
#ifdef NCURSES_MOUSE_VERSION
	case KEY_MOUSE:
	    do_mouse();
	    break;
#endif
#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;
			break;
		    case 'V':	/* Alt-[-V = Page Up in Hurd Console */
		    case 'I':	/* Alt-[-I = Page Up - FreeBSD Console */
			goto do_pageupkey;
			break;
		    case '6':	/* Alt-[-6 = Page Down */
			wgetch(edit);
			goto do_pagedownkey;
			break;
		    case 'U':	/* Alt-[-U = Page Down in Hurd Console */
		    case 'G':	/* Alt-[-G = Page Down - FreeBSD Console */
			goto do_pagedownkey;
			break;
		}
		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 > 1) {
		no_more = 0;
		blank_edit();
		page--;
	    }
	    break;
	}

	/* Calculate where in the text we should be, based on the page */
	for (i = 1; i < page; i++) {
	    row = 0;
	    j = 0;

	    while (row < editwinrows - 2 && *ptr != '\0') {
		if (*ptr == '\n' || j == COLS - 5) {
		    j = 0;
		    row++;
		}
		ptr++;
		j++;
	    }
	}

	i = 0;
	j = 0;
	while (i < editwinrows && *ptr != '\0') {
	    const char *end = ptr;
	    while (*end != '\n' && *end != '\0' && j != COLS - 5) {
		end++;
		j++;
	    }
	    if (j == COLS - 5) {

		/* Don't print half a word if we've run out of space */
		while (*end != ' ' && *end != '\0') {
		    end--;
		    j--;
		}
	    }
	    mvwaddnstr(edit, i, 0, ptr, j);
	    j = 0;
	    i++;
	    if (*end == '\n')
		end++;
	    ptr = end;
	}
	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 52
#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",
	"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",
	"", "", "", "",
	"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