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smol/winio.c

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/* $Id$ */
/**************************************************************************
* 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 <stdarg.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <ctype.h>
#include <assert.h>
#include "config.h"
#include "proto.h"
#include "nano.h"
#ifdef ENABLE_NLS
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
/* winio.c statics */
static int statblank = 0; /* Number of keystrokes left after
we call statusbar(), before we
actually blank the statusbar */
/* Local Function Prototypes for only winio.c */
static int get_page_start(int column);
/* Window I/O */
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 (fileptr->data[i] & 0x80)
/* Make 8 bit chars only 1 column! */
;
else if (iscntrl((int) fileptr->data[i]))
tabs++;
}
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 (iscntrl((int)*c))
length += 2;
else if ((unsigned char) *c >= 0x80 && (unsigned char) *c <= 0x9f)
length += 4;
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 (iscntrl((int)*buf))
length += 2;
else if ((unsigned char) *buf >= 0x80 && (unsigned char) *buf <= 0x9f)
length += 4;
else
length++;
}
return length;
}
size_t strlenpt(const char *buf)
{
return strnlenpt(buf, -1);
}
/* 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));
}
void blank_bottombars(void)
{
if (!no_help()) {
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! */
static 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(). */
static 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;
}
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();
}
/* 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. */
static 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, ' ');
}
}
static void clear_bottomwin(void)
{
if (ISSET(NO_HELP))
return;
mvwaddstr(bottomwin, 1, 0, hblank);
mvwaddstr(bottomwin, 2, 0, hblank);
}
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;
clear_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);
}
/* If modified is not already set, set it and update titlebar. */
void set_modified(void)
{
if (!ISSET(MODIFIED)) {
SET(MODIFIED);
titlebar(NULL);
wrefresh(topwin);
}
}
/* 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) */
inline 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 */
inline int get_page_start_virtual(int page)
{
int virtual;
virtual = --page * (COLS - 7);
if (page)
virtual -= 2 * page - 1;
return virtual;
}
inline int get_page_end_virtual(int page)
{
return get_page_start_virtual(page) + COLS - 1;
}
static int get_page_start(int column)
{
assert(COLS > 9);
return column < COLS - 1 ? 0 : column - 7 - (column - 8) % (COLS - 9);
}
#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, 0);
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, 0);
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, 0);
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, 0);
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, 0);
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 control characters as ^symbol (ASCII 1 - 31 omitting
10, 127) */
fileptr->data[pos++] = '^';
fileptr->data[pos++] = '?';
if (i < current_x)
virt_cur_x++;
if (i < mark_beginx)
virt_mark_beginx++;
} else if (realdata[i] >= 1 && realdata[i] <= 31 && realdata[i] != 10) {
fileptr->data[pos++] = '^';
fileptr->data[pos++] = realdata[i] + 64;
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 {
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);
}
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();
}
/* 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
}
/*
* 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 */
clear_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;
}
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;
}
void display_main_list(void)
{
bottombars(main_list);
}
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;
}
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;
}
#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 */
/* 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;
}
/* 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);
}
#ifdef NANO_EXTRA
#define CREDIT_LEN 52
void do_credits(void)
{
int i, j = 0, k, place = 0, start_x;
const char *what;
const char *nanotext = _("The nano text editor");
const char *version = _("version ");
const char *brought = _("Brought to you by:");
const char *specialthx = _("Special thanks to:");
const char *fsf = _("The Free Software Foundation");
const char *ncurses = _("For ncurses:");
const char *anyonelse = _("and anyone else we forgot...");
const char *thankyou = _("Thank you for using nano!\n");
const char *credits[CREDIT_LEN] = { nanotext,
version,
VERSION,
"",
brought,
"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",
"",
specialthx,
"Plattsburgh State University",
"Benet Laboratories",
"Amy Allegretta",
"Linda Young",
"Jeremy Robichaud",
"Richard Kolb II",
fsf,
"Linus Torvalds",
ncurses,
"Thomas Dickey",
"Pavel Curtis",
"Zeyd Ben-Halim",
"Eric S. Raymond",
anyonelse,
thankyou,
"", "", "", "",
"(c) 1999-2002 Chris Allegretta",
"", "", "", "",
"www.nano-editor.org"
};
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)];
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
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 */
}
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