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nano/nano.c
Chris Allegretta 67105eb11f Oops, fix for --enable-tiny 
git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@61 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2000-07-03 03:18:32 +00:00

1885 lines
42 KiB
C
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/**************************************************************************
* nano.c *
* *
* Copyright (C) 1999 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 1, 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 <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <errno.h>
#include <ctype.h>
#include <locale.h>
#include <limits.h>
#include <assert.h>
#include "config.h"
#include "proto.h"
#include "nano.h"
#ifndef NANO_SMALL
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_TERMIO_H
#include <termio.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
/* Former globals, now static */
char *last_search; /* Last string we searched for */
char *last_replace; /* Last replacement string */
int temp_opt = 0; /* Editing temp file (pico -t option) */
int fill = 0; /* Fill - where to wrap lines, basically */
static char *alt_speller; /* Alternative spell command */
struct termios oldterm; /* The user's original term settings */
static char *help_text_init = "";
/* Initial message, not including shortcuts */
/* What we do when we're all set to exit */
RETSIGTYPE finish(int sigage)
{
if (!ISSET(NO_HELP)) {
mvwaddstr(bottomwin, 1, 0, hblank);
mvwaddstr(bottomwin, 2, 0, hblank);
} else
mvwaddstr(bottomwin, 0, 0, hblank);
wrefresh(bottomwin);
endwin();
/* Restore the old term settings */
tcsetattr(0, TCSANOW, &oldterm);
exit(sigage);
}
/* Die (gracefully?) */
void die(char *msg, ...)
{
va_list ap;
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
/* if we can't save we have REAL bad problems,
* but we might as well TRY. FIXME: This should probabally base it
* off of the current filename */
write_file("nano.save", 0);
/* Restore the old term settings */
tcsetattr(0, TCSANOW, &oldterm);
clear();
refresh();
resetty();
endwin();
fprintf(stderr, msg);
fprintf(stderr, _("\nBuffer written to 'nano.save'\n"));
exit(1); /* We have a problem: exit w/ errorlevel(1) */
}
void print_view_warning(void)
{
statusbar(_("Key illegal in VIEW mode"));
}
/* Initialize global variables - no better way for now */
void global_init(void)
{
int i;
center_x = COLS / 2;
center_y = LINES / 2;
current_x = 0;
current_y = 0;
editwinrows = LINES - 5 + no_help();
fileage = NULL;
cutbuffer = NULL;
current = NULL;
edittop = NULL;
editbot = NULL;
totlines = 0;
placewewant = 0;
if (!fill)
fill = COLS - 8;
hblank = nmalloc(COLS + 1);
/* Thanks BG for this bit... */
for (i = 0; i <= COLS - 1; i++)
hblank[i] = ' ';
hblank[i] = 0;
last_search = nmalloc(132);
last_replace = nmalloc(132);
answer = nmalloc(132);
}
void init_help_msg(void)
{
#ifndef NANO_SMALL
help_text_init =
_(" nano help text\n\n "
"The nano editor is designed to emulate the functionality and "
"ease-of-use of the UW Pico text editor. There are four main "
"sections of the editor: The top line shows the program "
"version, the current filename being edited, and whether "
"or not the file has been modified. Next is the main editor "
"window showing the file being edited. The status line is "
"the third line from the bottom and shows important messages. "
"The bottom two lines show the most commonly used shortcuts "
"in the editor.\n\n "
"The notation for shortcuts is as follows: Control-key "
"sequences are notated with a caret (^) symbol. Alt-key "
"sequences are notated with an at (@) symbol. The following "
"keystrokes are available in the main editor window. "
"Optional keys are shown in parentheses:\n\n");
#endif
}
/* Make a copy of a node to a pointer (space will be malloc()ed) */
filestruct *copy_node(filestruct * src)
{
filestruct *dst;
dst = nmalloc(sizeof(filestruct));
dst->data = nmalloc(strlen(src->data) + 1);
dst->next = src->next;
dst->prev = src->prev;
strcpy(dst->data, src->data);
dst->lineno = src->lineno;
return dst;
}
/* Unlink a node from the rest of the struct */
void unlink_node(filestruct * fileptr)
{
if (fileptr->prev != NULL)
fileptr->prev->next = fileptr->next;
if (fileptr->next != NULL)
fileptr->next->prev = fileptr->prev;
}
void delete_node(filestruct * fileptr)
{
if (fileptr->data != NULL)
free(fileptr->data);
free(fileptr);
}
/* Okay, now let's duplicate a whole struct! */
filestruct *copy_filestruct(filestruct * src)
{
filestruct *dst, *tmp, *head, *prev;
head = copy_node(src);
dst = head; /* Else we barf on copying just one line */
head->prev = NULL;
tmp = src->next;
prev = head;
while (tmp != NULL) {
dst = copy_node(tmp);
dst->prev = prev;
prev->next = dst;
prev = dst;
tmp = tmp->next;
}
dst->next = NULL;
return head;
}
/* Free() a single node */
int free_node(filestruct * src)
{
if (src == NULL)
return 0;
if (src->next != NULL)
free(src->data);
free(src);
return 1;
}
int free_filestruct(filestruct * src)
{
filestruct *fileptr = src;
if (src == NULL)
return 0;
while (fileptr->next != NULL) {
fileptr = fileptr->next;
free_node(fileptr->prev);
#ifdef DEBUG
fprintf(stderr, _("free_node(): free'd a node, YAY!\n"));
#endif
}
free_node(fileptr);
#ifdef DEBUG
fprintf(stderr, _("free_node(): free'd last node.\n"));
#endif
return 1;
}
int renumber_all(void)
{
filestruct *temp;
long i = 1;
for (temp = fileage; temp != NULL; temp = temp->next) {
temp->lineno = i++;
}
return 0;
}
int renumber(filestruct * fileptr)
{
filestruct *temp;
if (fileptr == NULL || fileptr->prev == NULL || fileptr == fileage) {
renumber_all();
return 0;
}
for (temp = fileptr; temp != NULL; temp = temp->next) {
temp->lineno = temp->prev->lineno + 1;
}
return 0;
}
/* Fix the memory allocation for a string */
void align(char **strp)
{
/* There was a serious bug here: the new address was never
stored anywhere... */
*strp = nrealloc(*strp, strlen(*strp) + 1);
}
void usage(void)
{
#ifdef HAVE_GETOPT_LONG
printf(_("Usage: nano [GNU long option] [option] +LINE <file>\n\n"));
printf(_("Option Long option Meaning\n"));
#ifdef HAVE_TABSIZE
printf(_
(" -T --tabsize=[num] Set width of a tab to num\n"));
#endif
printf
(_
(" -V --version Print version information and exit\n"));
printf(_
(" -c --const Constantly show cursor position\n"));
printf(_
(" -h --help Show this message\n"));
printf(_
(" -i --autoindent Automatically indent new lines\n"));
printf(_
(" -l --nofollow Don't follow symbolic links, overwrite.\n"));
#ifndef NANO_SMALL
#ifdef NCURSES_MOUSE_VERSION
printf(_(" -m --mouse Enable mouse\n"));
#endif
#endif
printf
(_
(" -r [#cols] --fill=[#cols] Set fill cols to (wrap lines at) #cols\n"));
printf(_
(" -p --pico Make bottom 2 lines more Pico-like\n"));
printf(_
(" -s [prog] --speller=[prog] Enable alternate speller\n"));
printf(_
(" -t --tempfile Auto save on exit, don't prompt\n"));
printf(_
(" -v --view View (read only) mode\n"));
printf(_
(" -w --nowrap Don't wrap long lines\n"));
printf(_
(" -x --nohelp Don't show help window\n"));
printf(_
(" -z --suspend Enable suspend\n"));
printf(_
(" +LINE Start at line number LINE\n"));
#else
printf(_("Usage: nano [option] +LINE <file>\n\n"));
printf(_("Option Meaning\n"));
#ifdef HAVE_TABSIZE
printf(_(" -T [num] Set width of a tab to num\n"));
#endif
printf(_(" -V Print version information and exit\n"));
printf(_(" -c Constantly show cursor position\n"));
printf(_(" -h Show this message\n"));
printf(_(" -i Automatically indent new lines\n"));
printf(_
(" -l Don't follow symbolic links, overwrite.\n"));
#ifndef NANO_SMALL
#ifdef NCURSES_MOUSE_VERSION
printf(_(" -m Enable mouse\n"));
#endif
#endif
printf(_
(" -r [#cols] Set fill cols to (wrap lines at) #cols\n"));
printf(_(" -s [prog] Enable alternate speller\n"));
printf(_(" -p Make bottom 2 lines more Pico-like\n"));
printf(_(" -t Auto save on exit, don't prompt\n"));
printf(_(" -v View (read only) mode\n"));
printf(_(" -w Don't wrap long lines\n"));
printf(_(" -x Don't show help window\n"));
printf(_(" -z Enable suspend\n"));
printf(_(" +LINE Start at line number LINE\n"));
#endif
exit(0);
}
void version(void)
{
printf(_(" nano version %s by Chris Allegretta (compiled %s, %s)\n"),
VERSION, __TIME__, __DATE__);
printf(_(" Email: nano@asty.org Web: http://www.asty.org/nano\n"));
}
filestruct *make_new_node(filestruct * prevnode)
{
filestruct *newnode;
newnode = nmalloc(sizeof(filestruct));
newnode->data = NULL;
newnode->prev = prevnode;
newnode->next = NULL;
if (prevnode != NULL)
newnode->lineno = prevnode->lineno + 1;
return newnode;
}
int do_mark()
{
#ifdef NANO_SMALL
nano_small_msg();
#else
if (!ISSET(MARK_ISSET)) {
statusbar(_("Mark Set"));
SET(MARK_ISSET);
mark_beginbuf = current;
mark_beginx = current_x;
} else {
statusbar(_("Mark UNset"));
UNSET(MARK_ISSET);
mark_beginbuf = NULL;
mark_beginx = 0;
edit_refresh();
}
#endif
return 1;
}
int no_help(void)
{
if ISSET
(NO_HELP)
return 2;
else
return 0;
}
void nano_small_msg(void)
{
statusbar("Sorry, this function not available with nano-tiny option");
}
/* The user typed a printable character; add it to the edit buffer */
void do_char(char ch)
{
/* More dangerousness fun =) */
current->data = nrealloc(current->data, strlen(current->data) + 2);
memmove(&current->data[current_x + 1],
&current->data[current_x],
strlen(current->data) - current_x + 1);
current->data[current_x] = ch;
do_right();
if (!ISSET(NO_WRAP) && (ch != '\t'))
check_wrap(current, ch);
set_modified();
check_statblank();
UNSET(KEEP_CUTBUFFER);
totsize++;
}
/* Someone hits return *gasp!* */
int do_enter(filestruct * inptr)
{
filestruct *new;
char *tmp, *spc;
int extra = 0;
new = make_new_node(inptr);
tmp = &current->data[current_x];
current_x = 0;
/* Do auto-indenting, like the neolithic Turbo Pascal editor */
if (ISSET(AUTOINDENT)) {
spc = current->data;
if (spc) {
while ((*spc == ' ') || (*spc == '\t')) {
extra++;
spc++;
current_x++;
}
new->data = nmalloc(strlen(tmp) + extra + 1);
strncpy(new->data, current->data, extra);
strcpy(&new->data[extra], tmp);
}
} else {
new->data = nmalloc(strlen(tmp) + 1);
strcpy(new->data, tmp);
}
*tmp = 0;
new->next = inptr->next;
new->prev = inptr;
inptr->next = new;
if (new->next != NULL)
new->next->prev = new;
else {
filebot = new;
editbot = new;
}
totsize++;
renumber(current);
current = new;
align(&current->data);
if (current_y == editwinrows - 1) {
edit_update(current);
/* FIXME - figure out why the hell this is needed =) */
reset_cursor();
} else
current_y++;
totlines++;
set_modified();
update_cursor();
edit_refresh();
placewewant = xplustabs();
return 1;
}
int do_enter_void(void)
{
return do_enter(current);
}
void do_next_word(void)
{
filestruct *fileptr;
int i;
if (current == NULL)
return;
i = current_x;
for (fileptr = current; fileptr != NULL; fileptr = fileptr->next) {
if (fileptr == current) {
while (isalnum((int) fileptr->data[i])
&& fileptr->data[i] != 0)
i++;
if (fileptr->data[i] == 0) {
i = 0;
continue;
}
}
while (!isalnum((int) fileptr->data[i]) && fileptr->data[i] != 0)
i++;
if (fileptr->data[i] != 0)
break;
i = 0;
}
if (fileptr == NULL)
current = filebot;
else
current = fileptr;
current_x = i;
placewewant = xplustabs();
if (current->lineno >= editbot->lineno)
edit_update(current);
}
void do_wrap(filestruct * inptr, char input_char)
{
int i = 0; /* Index into ->data for line. */
int i_tabs = 0; /* Screen position of ->data[i]. */
int last_word_end = -1; /* Location of end of last word found. */
int current_word_start = -1; /* Location of start of current word. */
int current_word_start_t = -1; /* Location of start of current word screen position. */
int current_word_end = -1; /* Location of end of current word */
int current_word_end_t = -1; /* Location of end of current word screen position. */
int len = strlen(inptr->data);
int down = 0;
int right = 0;
struct filestruct *temp = NULL;
assert(strlenpt(inptr->data) > fill);
for (i = 0, i_tabs = 0; i < len; i++, i_tabs++) {
if (!isspace(inptr->data[i])) {
last_word_end = current_word_end;
current_word_start = i;
current_word_start_t = i_tabs;
while (!isspace(inptr->data[i]) && inptr->data[i]) {
i++;
i_tabs++;
if (inptr->data[i] < 32)
i_tabs++;
}
if (inptr->data[i]) {
current_word_end = i;
current_word_end_t = i_tabs;
} else {
current_word_end = i - 1;
current_word_end_t = i_tabs - 1;
}
}
if (inptr->data[i] == NANO_CONTROL_I) {
if (i_tabs % TABSIZE != 0);
i_tabs += TABSIZE - (i_tabs % TABSIZE);
}
if (current_word_end_t > fill)
break;
}
assert(current_word_end_t > fill);
/* There are a few (ever changing) cases of what the line could look like.
* 1) only one word on the line before wrap point.
* a) one word takes up the whole line with no starting spaces.
* - do nothing and return.
* b) cursor is on word or before word at wrap point and there are spaces at beginning.
* - word starts new line.
* - keep white space on original line up to the cursor.
* *) cursor is after word at wrap point
* - either it's all white space after word, and this routine isn't called.
* - or we are actually in case 2 (2 words).
* 2) Two or more words on the line before wrap point.
* a) cursor is at a word or space before wrap point
* - word at wrap point starts a new line.
* - white space at end of original line is cleared, unless
* it is all spaces between previous word and next word which appears after fill.
* b) cursor is at the word at the wrap point.
* - word at wrap point starts a new line.
* 1. pressed a space and at first character of wrap point word.
* - white space on original line is kept to where cursor was.
* 2. pressed non space (or space elsewhere).
* - white space at end of original line is cleared.
* c) cursor is past the word at the wrap point.
* - word at wrap point starts a new line.
* - white space at end of original line is cleared
*/
temp = nmalloc(sizeof(filestruct));
/* Category 1a: one word taking up the whole line with no beginning spaces. */
if ((last_word_end == -1) && (!isspace(inptr->data[0]))) {
for (i = current_word_end; i < len; i++) {
if (!isspace(inptr->data[i]) && i < len) {
current_word_start = i;
while (!isspace(inptr->data[i]) && (i < len)) {
i++;
}
last_word_end = current_word_end;
current_word_end = i;
break;
}
}
if (last_word_end == -1) {
free(temp);
return;
}
if (current_x >= last_word_end) {
right = (current_x - current_word_start) + 1;
current_x = last_word_end;
down = 1;
}
temp->data = nmalloc(strlen(&inptr->data[current_word_start]) + 1);
strcpy(temp->data, &inptr->data[current_word_start]);
inptr->data = nrealloc(inptr->data, last_word_end + 2);
inptr->data[last_word_end + 1] = 0;
} else
/* Category 1b: one word on the line and word not taking up whole line
(i.e. there are spaces at the beginning of the line) */
if (last_word_end == -1) {
temp->data = nmalloc(strlen(&inptr->data[current_word_start]) + 1);
strcpy(temp->data, &inptr->data[current_word_start]);
/* Inside word, remove it from original, and move cursor to right spot. */
if (current_x >= current_word_start) {
right = current_x - current_word_start;
current_x = 0;
down = 1;
}
inptr->data = nrealloc(inptr->data, current_x + 1);
inptr->data[current_x] = 0;
if (ISSET(MARK_ISSET) && (mark_beginbuf == inptr)) {
mark_beginbuf = temp;
mark_beginx = 0;
}
}
/* Category 2: two or more words on the line. */
else {
/* Case 2a: cursor before word at wrap point. */
if (current_x < current_word_start) {
temp->data =
nmalloc(strlen(&inptr->data[current_word_start]) + 1);
strcpy(temp->data, &inptr->data[current_word_start]);
if (!isspace(input_char)) {
i = current_word_start - 1;
while (isspace(inptr->data[i])) {
i--;
assert(i >= 0);
}
} else if (current_x <= last_word_end)
i = last_word_end - 1;
else
i = current_x;
inptr->data = nrealloc(inptr->data, i + 2);
inptr->data[i + 1] = 0;
}
/* Case 2b: cursor at word at wrap point. */
else if ((current_x >= current_word_start)
&& (current_x <= (current_word_end + 1))) {
temp->data =
nmalloc(strlen(&inptr->data[current_word_start]) + 1);
strcpy(temp->data, &inptr->data[current_word_start]);
down = 1;
right = current_x - current_word_start;
i = current_word_start - 1;
if (isspace(input_char) && (current_x == current_word_start)) {
current_x = current_word_start;
inptr->data =
nrealloc(inptr->data, current_word_start + 1);
inptr->data[current_word_start] = 0;
} else {
while (isspace(inptr->data[i])) {
i--;
assert(i >= 0);
}
inptr->data = nrealloc(inptr->data, i + 2);
inptr->data[i + 1] = 0;
}
}
/* Case 2c: cursor past word at wrap point. */
else {
temp->data =
nmalloc(strlen(&inptr->data[current_word_start]) + 1);
strcpy(temp->data, &inptr->data[current_word_start]);
down = 1;
right = current_x - current_word_start;
current_x = current_word_start;
i = current_word_start - 1;
while (isspace(inptr->data[i])) {
i--;
assert(i >= 0);
inptr->data = nrealloc(inptr->data, i + 2);
inptr->data[i + 1] = 0;
}
}
}
/* We pre-pend wrapped part to next line. */
if (ISSET(SAMELINEWRAP) && inptr->next) {
/* Plus one for the space which concatenates the two lines together plus 1 for \0. */
char *p =
nmalloc(strlen(temp->data) + strlen(inptr->next->data) + 2);
int old_x = current_x, old_y = current_y;
strcpy(p, temp->data);
strcat(p, " ");
strcat(p, inptr->next->data);
free(inptr->next->data);
inptr->next->data = p;
free(temp->data);
free(temp);
/* The next line line may need to be wrapped as well. */
current_y = old_y + 1;
current_x = strlen(inptr->next->data);
while (current_x >= 0) {
if (isspace(inptr->next->data[current_x])
&& (current_x < fill)) break;
current_x--;
}
if (current_x >= 0)
check_wrap(inptr->next, ' ');
current_x = old_x;
current_y = old_y;
}
/* Else we start a new line. */
else {
temp->prev = inptr;
temp->next = inptr->next;
if (inptr->next)
inptr->next->prev = temp;
inptr->next = temp;
if (!temp->next)
filebot = temp;
SET(SAMELINEWRAP);
}
totlines++;
totsize++;
renumber(inptr);
edit_update_top(edittop);
/* Move the cursor to the new line if appropriate. */
if (down) {
do_right();
}
/* Move the cursor to the correct spot in the line if appropriate. */
while (right--) {
do_right();
}
edit_update_top(edittop);
reset_cursor();
edit_refresh();
}
/* Check to see if we've just caused the line to wrap to a new line */
void check_wrap(filestruct * inptr, char ch)
{
int len = strlenpt(inptr->data);
#ifdef DEBUG
fprintf(stderr, _("check_wrap called with inptr->data=\"%s\"\n"),
inptr->data);
#endif
if (len <= fill)
return;
else {
int i = actual_x(inptr, fill);
/* Do not wrap if there are no words on or after wrap point. */
int char_found = 0;
while (isspace(inptr->data[i]) && inptr->data[i])
i++;
if (!inptr->data[i])
return;
/* String must be at least 1 character long. */
for (i = strlen(inptr->data) - 1; i >= 0; i--) {
if (isspace(inptr->data[i])) {
if (!char_found)
continue;
char_found = 2; /* 2 for yes do wrap. */
break;
} else
char_found = 1; /* 1 for yes found a word, but must check further. */
}
if (char_found == 2)
do_wrap(inptr, ch);
}
}
/* Stuff we do when we abort from programs and want to clean up the
* screen. This doesnt do much right now.
*/
void do_early_abort(void)
{
blank_statusbar_refresh();
}
int page_up(void)
{
wrap_reset();
current_x = 0;
placewewant = 0;
if (current == fileage)
return 0;
current_y = 0;
edit_update_bot(edittop);
update_cursor();
UNSET(KEEP_CUTBUFFER);
check_statblank();
return 1;
}
void delete_buffer(filestruct * inptr)
{
if (inptr != NULL) {
delete_buffer(inptr->next);
free(inptr->data);
free(inptr);
}
}
int do_backspace(void)
{
filestruct *previous, *tmp;
if (current_x != 0) {
/* Let's get dangerous */
memmove(&current->data[current_x - 1], &current->data[current_x],
strlen(current->data) - current_x + 1);
#ifdef DEBUG
fprintf(stderr, _("current->data now = \"%s\"\n"), current->data);
#endif
align(&current->data);
do_left();
} else {
if (current == fileage)
return 0; /* Can't delete past top of file */
previous = current->prev;
current_x = strlen(previous->data);
previous->data = nrealloc(previous->data,
strlen(previous->data) +
strlen(current->data) + 1);
strcat(previous->data, current->data);
tmp = current;
unlink_node(current);
delete_node(current);
if (current == edittop) {
if (previous->next)
current = previous->next;
else
current = previous;
page_up();
} else {
if (previous->next)
current = previous->next;
else
current = previous;
update_line(current, current_x);
}
/* Ooops, sanity check */
if (tmp == filebot) {
filebot = current;
editbot = current;
}
current = previous;
renumber(current);
previous_line();
totlines--;
#ifdef DEBUG
fprintf(stderr, _("After, data = \"%s\"\n"), current->data);
#endif
}
totsize--;
set_modified();
UNSET(KEEP_CUTBUFFER);
edit_refresh();
return 1;
}
int do_delete(void)
{
filestruct *foo;
if (current_x != strlen(current->data)) {
/* Let's get dangerous */
memmove(&current->data[current_x], &current->data[current_x + 1],
strlen(current->data) - current_x);
align(&current->data);
} else if (current->next != NULL) {
current->data = nrealloc(current->data,
strlen(current->data) +
strlen(current->next->data) + 1);
strcat(current->data, current->next->data);
foo = current->next;
if (filebot == foo) {
filebot = current;
editbot = current;
}
unlink_node(foo);
delete_node(foo);
update_line(current, current_x);
renumber(current);
totlines--;
} else
return 0;
totsize--;
set_modified();
UNSET(KEEP_CUTBUFFER);
edit_refresh();
return 1;
}
void wrap_reset(void)
{
UNSET(SAMELINEWRAP);
}
/* Stuff we want to do when we exit the spell program one of its many ways */
void exit_spell(char *tmpfilename, char *foo)
{
free(foo);
if (remove(tmpfilename) == -1)
statusbar(_("Error deleting tempfile, ack!"));
}
/*
* This is Chris' very ugly spell function. Someone please make this
* better =-)
*/
int do_spell(void)
{
#ifdef NANO_SMALL
nano_small_msg();
return 1;
#else
char *temp, *foo;
int i, size;
if ((temp = tempnam(0, "nano.")) == NULL) {
statusbar(_("Could not create a temporary filename: %s"),
strerror(errno));
return 0;
}
if (write_file(temp, 1) == -1)
return 0;
if (alt_speller) {
size = strlen(temp) + strlen(alt_speller) + 2;
foo = nmalloc(size);
snprintf(foo, size, "%s %s", alt_speller, temp);
} else {
/* For now, we only try ispell because we're not capable of
handling the normal spell program (yet...) */
size = strlen(temp) + 8;
foo = nmalloc(size);
snprintf(foo, size, "ispell %s", temp);
}
endwin();
resetty();
if (alt_speller) {
if ((i = system(foo)) == -1 || i == 32512) {
statusbar(_("Could not invoke spell program \"%s\""),
alt_speller);
exit_spell(temp, foo);
return 0;
}
} else if ((i = system(foo)) == -1 || i == 32512) { /* Why 32512? I dont know! */
statusbar(_("Could not invoke \"ispell\""));
exit_spell(temp, foo);
return 0;
}
initscr();
free_filestruct(fileage);
global_init();
open_file(temp, 0, 1);
edit_update(fileage);
set_modified();
exit_spell(temp, foo);
statusbar(_("Finished checking spelling"));
return 1;
#endif
}
int do_exit(void)
{
int i;
if (!ISSET(MODIFIED))
finish(0);
if (temp_opt) {
i = 1;
} else {
i =
do_yesno(0, 0,
_
("Save modified buffer (ANSWERING \"No\" WILL DESTROY CHANGES) ? "));
}
#ifdef DEBUG
dump_buffer(fileage);
#endif
if (i == 1) {
if (do_writeout(1) > 0)
finish(0);
} else if (i == 0)
finish(0);
else
statusbar(_("Cancelled"));
display_main_list();
return 1;
}
#ifndef NANO_SMALL
#ifdef NCURSES_MOUSE_VERSION
void do_mouse(void)
{
MEVENT mevent;
if (getmouse(&mevent) == ERR)
return;
/* If mouse not in edit window, return (add help selection later). */
if (!wenclose(edit, mevent.y, mevent.x))
return;
/* Subtract out size of topwin. Perhaps we need a constant somewhere? */
mevent.y -= 2;
/* Selecting where the cursor is sets the mark.
* Selecting beyond the line length with the cursor at the end of the
* line sets the mark as well.
*/
if ((mevent.y == current_y) &&
((mevent.x == current_x) || (current_x == strlen(current->data)
&& (mevent.x >
strlen(current->data))))) {
if (ISSET(VIEW_MODE)) {
print_view_warning();
return;
}
do_mark();
} else if (mevent.y > current_y) {
while (mevent.y > current_y) {
if (current->next != NULL)
current = current->next;
else
break;
current_y++;
}
} else if (mevent.y < current_y) {
while (mevent.y < current_y) {
if (current->prev != NULL)
current = current->prev;
else
break;
current_y--;
}
}
current_x = mevent.x;
if (current_x > strlen(current->data))
current_x = strlen(current->data);
update_cursor();
edit_refresh();
}
#endif
#endif
/* Handler for SIGHUP */
RETSIGTYPE handle_hup(int signal)
{
write_file("nano.save", 0);
finish(1);
}
void handle_sigwinch(int s)
{
#ifndef NANO_SMALL
char *tty = NULL;
int fd = 0;
int result = 0;
int i = 0;
struct winsize win;
tty = ttyname(0);
if (!tty)
return;
fd = open(tty, O_RDWR);
if (fd == -1)
return;
result = ioctl(fd, TIOCGWINSZ, &win);
if (result == -1)
return;
COLS = win.ws_col;
LINES = win.ws_row;
center_x = COLS / 2;
center_y = LINES / 2;
editwinrows = LINES - 5 + no_help();
fill = COLS - 8;
free(hblank);
hblank = nmalloc(COLS + 1);
for (i = 0; i <= COLS - 1; i++)
hblank[i] = ' ';
hblank[i] = 0;
#ifdef HAVE_NCURSES_H
resizeterm(LINES, COLS);
#ifdef HAVE_WRESIZE
if (wresize(topwin, 2, COLS) == ERR)
die(_("Cannot resize top win"));
if (mvwin(topwin, 0, 0) == ERR)
die(_("Cannot move top win"));
if (wresize(edit, editwinrows, COLS) == ERR)
die(_("Cannot resize edit win"));
if (mvwin(edit, 2, 0) == ERR)
die(_("Cannot move edit win"));
if (wresize(bottomwin, 3 - no_help(), COLS) == ERR)
die(_("Cannot resize bottom win"));
if (mvwin(bottomwin, LINES - 3 + no_help(), 0) == ERR)
die(_("Cannot move bottom win"));
#endif /* HAVE_WRESIZE */
#endif /* HAVE_NCURSES_H */
editbot = edittop;
for (i = 0; (i <= editwinrows - 1) && (editbot->next != NULL)
&& (editbot->next != filebot); i++)
editbot = editbot->next;
if (current_y > editwinrows - 1) {
edit_update(editbot);
}
erase();
/* Do these b/c width may have changed... */
refresh();
titlebar();
edit_refresh();
display_main_list();
total_refresh();
#endif
}
int do_tab(void)
{
do_char('\t');
return 1;
}
#ifndef NANO_SMALL
int empty_line(const char *data)
{
while (*data) {
if (!isspace(*data))
return 0;
data++;
}
return 1;
}
int no_spaces(const char *data)
{
while (*data) {
if (isspace(*data))
return 0;
data++;
}
return 1;
}
void justify_format(char *data)
{
int i = 0;
int len = strlen(data);
/* Skip first character regardless and leading whitespace. */
for (i = 1; i < len; i++) {
if (!isspace(data[i]))
break;
}
i++; /* (i) is now at least 2. */
/* No double spaces allowed unless following a period. Tabs -> space. No double tabs. */
for (; i < len; i++) {
if (isspace(data[i]) && isspace(data[i - 1])
&& (data[i - 2] != '.')) {
memmove(data + i, data + i + 1, len - i);
len--;
i--;
}
}
}
#endif
int do_justify(void)
{
#ifndef NANO_SMALL
int slen = 0; /* length of combined lines on one line. */
int initial_y;
filestruct *initial = NULL;
if (empty_line(current->data)) {
/* Justify starting at first non-empty line. */
do {
if (!current->next)
return 1;
current = current->next;
current_y++;
}
while (empty_line(current->data));
} else {
/* Search back for the beginning of the paragraph, where
* Paragraph is 1) A line with leading whitespace
* or 2) A line following an empty line.
*/
while (current->prev != NULL) {
if (isspace(current->data[0]) || !current->data[0])
break;
current = current->prev;
current_y--;
}
/* First line with leading whitespace may be empty. */
if (empty_line(current->data)) {
if (current->next) {
current = current->next;
current_y++;
} else
return 1;
}
}
initial = current;
initial_y = current_y;
set_modified();
/* Put the whole paragraph into one big line. */
while (current->next && !isspace(current->next->data[0])
&& current->next->data[0]) {
filestruct *tmpnode = current->next;
int len = strlen(current->data);
int len2 = strlen(current->next->data);
/* length of both strings plus space between strings and ending \0. */
current->data = nrealloc(current->data, len + len2 + 2);
current->data[len++] = ' ';
current->data[len] = '\0';
strncat(current->data, current->next->data, len2);
unlink_node(tmpnode);
delete_node(tmpnode);
}
justify_format(current->data);
slen = strlen(current->data);
while ((strlenpt(current->data) > (fill))
&& !no_spaces(current->data)) {
int i = 0;
int len2 = 0;
filestruct *tmpline = nmalloc(sizeof(filestruct));
/* Start at fill , unless line isn't that long (but it appears at least
* fill long with tabs.
*/
if (slen > fill)
i = fill;
else
i = slen;
for (; i > 0; i--) {
if (isspace(current->data[i]) &&
((strlenpt(current->data) - strlen(current->data + i)) <=
fill)) break;
}
if (!i)
break;
current->data[i] = '\0';
len2 = strlen(current->data + i + 1);
tmpline->data = nmalloc(len2 + 1);
/* Skip the white space in current. */
memcpy(tmpline->data, current->data + i + 1, len2);
tmpline->data[len2] = '\0';
current->data = nrealloc(current->data, i + 1);
tmpline->prev = current;
tmpline->next = current->next;
if (current->next != NULL)
current->next->prev = tmpline;
current->next = tmpline;
current = tmpline;
slen -= i + 1;
current_y++;
}
if (current->next)
current = current->next;
else
filebot = current;
current_x = 0;
placewewant = 0;
renumber(initial);
totlines = filebot->lineno;
werase(edit);
if ((current_y < 0) || (current_y >= editwinrows - 1)
|| (initial_y <= 0)) {
edit_update(current);
center_cursor();
} else {
int i = 0;
editbot = edittop;
for (i = 0; (i <= editwinrows - 1) && (editbot->next != NULL)
&& (editbot->next != filebot); i++)
editbot = editbot->next;
}
edit_refresh();
edit_refresh(); /* XXX FIXME XXX */
statusbar("Justify Complete");
return 1;
#else
nano_small_msg();
return 1;
#endif
}
void help_init(void)
{
int i, sofar = 0;
long allocsize = 1; /* How much space we're gonna need for the help text */
char buf[BUFSIZ];
/* Compute the space needed for the shortcut lists - we add 15 to
have room for the shortcut abbrev and its possible alternate keys */
for (i = 0; i < MAIN_LIST_LEN; i++)
if (main_list[i].help != NULL)
allocsize += strlen(main_list[i].help) + 15;
allocsize += strlen(help_text_init);
if (help_text != NULL)
free(help_text);
/* Allocate space for the help text */
help_text = nmalloc(allocsize);
/* Now add the text we want */
strcpy(help_text, help_text_init);
/* Now add our shortcut info */
for (i = 0; i < MAIN_LIST_LEN; i++) {
sofar = snprintf(buf, BUFSIZ, "^%c ", main_list[i].val + 64);
if (main_list[i].misc1 > KEY_F0 && main_list[i].misc1 <= KEY_F(64))
sofar += snprintf(&buf[sofar], BUFSIZ - sofar, "(F%d) ",
main_list[i].misc1 - KEY_F0);
else
sofar += snprintf(&buf[sofar], BUFSIZ - sofar, " ");
if (main_list[i].altval > 0)
sofar += snprintf(&buf[sofar], BUFSIZ - sofar, "(@%c) ",
main_list[i].altval - 32);
else
sofar += snprintf(&buf[sofar], BUFSIZ - sofar, " ");
if (main_list[i].help != NULL)
snprintf(&buf[sofar], BUFSIZ - sofar, "%s\n", main_list[i].help);
strcat(help_text, buf);
}
}
int main(int argc, char *argv[])
{
int optchr;
int kbinput; /* Input from keyboard */
long startline = 0; /* Line to try and start at */
struct sigaction act; /* For our lovely signals */
int keyhandled = 0; /* Have we handled the keystroke yet? */
int tmpkey = 0, i;
#ifdef HAVE_TABSIZE
int usrtabsize = 0; /* User defined tab size */
#endif
char *argv0;
struct termios term;
#ifdef HAVE_GETOPT_LONG
int option_index = 0;
struct option long_options[] = {
{"version", 0, 0, 'V'},
{"const", 0, 0, 'c'},
{"suspend", 0, 0, 'z'},
{"nowrap", 0, 0, 'w'},
{"nohelp", 0, 0, 'x'},
{"help", 0, 0, 'h'},
{"autoindent", 0, 0, 'i'},
{"tempfile", 0, 0, 't'},
{"speller", 1, 0, 's'},
{"fill", 1, 0, 'r'},
{"mouse", 0, 0, 'm'},
{"pico", 0, 0, 'p'},
{"nofollow", 0, 0, 'l'},
#ifdef HAVE_TABSIZE
{"tabsize", 0, 0, 'T'},
#endif
{0, 0, 0, 0}
};
#endif
/* Flag inits... */
SET(FOLLOW_SYMLINKS);
#ifndef NANO_SMALL
setlocale(LC_ALL, "");
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
#endif
#ifdef HAVE_GETOPT_LONG
while ((optchr = getopt_long(argc, argv, "?T:Vchilmpr:s:tvwxz",
long_options, &option_index)) != EOF) {
#else
while ((optchr = getopt(argc, argv, "h?T:Vcilmpr:s:tvwxz")) != EOF) {
#endif
switch (optchr) {
#ifdef HAVE_TABSIZE
case 'T':
usrtabsize = atoi(optarg);
if (usrtabsize <= 0) {
usage(); /* To stop bogus data for tab width */
finish(1);
}
break;
#else
case 'T':
usage(); /* Oops! You dont really have that option */
finish(1);
#endif
case 'V':
version();
exit(0);
case 'c':
SET(CONSTUPDATE);
break;
case 'h':
case '?':
usage();
exit(0);
case 'i':
SET(AUTOINDENT);
break;
case 'l':
UNSET(FOLLOW_SYMLINKS);
break;
case 'm':
SET(USE_MOUSE);
break;
case 'p':
SET(PICO_MSGS);
break;
case 'r':
fill = atoi(optarg);
if (fill <= 0) {
usage(); /* To stop bogus data (like a string) */
finish(1);
}
break;
case 's':
alt_speller = nmalloc(strlen(optarg) + 1);
strcpy(alt_speller, optarg);
break;
case 't':
temp_opt = 1;
break;
case 'v':
SET(VIEW_MODE);
break;
case 'w':
SET(NO_WRAP);
break;
case 'x':
SET(NO_HELP);
break;
case 'z':
SET(SUSPEND);
break;
default:
usage();
exit(0);
}
}
argv0 = strrchr(argv[0], '/');
if ((argv0 && strstr(argv0, "pico"))
|| (!argv0 && strstr(argv[0], "pico")))
SET(PICO_MSGS);
filename = nmalloc(PATH_MAX);
strcpy(filename, "");
/* See if there's a non-option in argv (first non-option is the
filename, if +LINE is not given) */
if (argc == 1 || argc <= optind)
strcpy(filename, "");
else {
/* Look for the +line flag... */
if (argv[optind][0] == '+') {
startline = atoi(&argv[optind][1]);
optind++;
if (argc == 1 || argc <= optind)
strcpy(filename, "");
else
strncpy(filename, argv[optind], 132);
} else
strncpy(filename, argv[optind], 132);
}
/* First back up the old settings so they can be restored, duh */
tcgetattr(0, &oldterm);
/* Adam's code to blow away intr character so ^C can show cursor pos */
tcgetattr(0, &term);
for (i = 0; i < NCCS; i++) {
if (term.c_cc[i] == CINTR || term.c_cc[i] == CQUIT)
term.c_cc[i] = 0;
}
tcsetattr(0, TCSANOW, &term);
/* now ncurses init stuff... */
initscr();
savetty();
nonl();
cbreak();
noecho();
timeout(0);
/* Set up some global variables */
global_init();
shortcut_init();
init_help_msg();
help_init();
/* Trap SIGINT and SIGQUIT cuz we want them to do useful things. */
memset(&act, 0, sizeof(struct sigaction));
act.sa_handler = SIG_IGN;
sigaction(SIGINT, &act, NULL);
sigaction(SIGQUIT, &act, NULL);
if (!ISSET(SUSPEND))
sigaction(SIGTSTP, &act, NULL);
/* Trap SIGHUP cuz we want to write the file out. */
act.sa_handler = handle_hup;
sigaction(SIGHUP, &act, NULL);
act.sa_handler = handle_sigwinch;
sigaction(SIGWINCH, &act, NULL);
#ifdef DEBUG
fprintf(stderr, _("Main: set up windows\n"));
#endif
/* Setup up the main text window */
edit = newwin(editwinrows, COLS, 2, 0);
keypad(edit, TRUE);
#ifndef NANO_SMALL
#ifdef NCURSES_MOUSE_VERSION
if (ISSET(USE_MOUSE)) {
mousemask(BUTTON1_RELEASED, NULL);
mouseinterval(50);
}
#endif
#endif
/* And the other windows */
topwin = newwin(2, COLS, 0, 0);
bottomwin = newwin(3 - no_help(), COLS, LINES - 3 + no_help(), 0);
keypad(bottomwin, TRUE);
#ifdef DEBUG
fprintf(stderr, _("Main: bottom win\n"));
#endif
/* Set up up bottom of window */
display_main_list();
#ifdef DEBUG
fprintf(stderr, _("Main: open file\n"));
#endif
titlebar();
if (argc == 1)
new_file();
else
open_file(filename, 0, 0);
if (startline > 0)
do_gotoline(startline);
else
edit_update(fileage);
edit_refresh();
reset_cursor();
#ifdef HAVE_TABSIZE
if (usrtabsize > 0)
TABSIZE = usrtabsize;
#endif
while (1) {
kbinput = wgetch(edit);
if (kbinput == 27) { /* Grab Alt-key stuff first */
switch (kbinput = wgetch(edit)) {
case 91:
switch (kbinput = wgetch(edit)) {
case 'A':
kbinput = KEY_UP;
break;
case 'B':
kbinput = KEY_DOWN;
break;
case 'C':
kbinput = KEY_RIGHT;
break;
case 'D':
kbinput = KEY_LEFT;
break;
case 'H':
kbinput = KEY_HOME;
break;
case 'F':
kbinput = KEY_END;
break;
case 49: /* X window F-keys */
tmpkey = wgetch(edit);
kbinput = KEY_F(tmpkey) - 48;
wgetch(edit); /* Junk character */
break;
case 53: /* page up */
kbinput = KEY_PPAGE;
if ((kbinput = wgetch(edit)) == 126)
kbinput = KEY_PPAGE; /* Ignore extra tilde */
else { /* I guess this could happen ;-) */
ungetch(kbinput);
continue;
}
break;
case 54: /* page down */
kbinput = KEY_NPAGE;
if ((kbinput = wgetch(edit)) == 126)
kbinput = KEY_NPAGE; /* Same thing here */
else {
ungetch(kbinput);
continue;
}
break;
default:
#ifdef DEBUG
fprintf(stderr, _("I got Alt-[-%c! (%d)\n"),
kbinput, kbinput);
#endif
break;
}
break;
default:
/* Check for the altkey defs.... */
for (i = 0; i <= MAIN_LIST_LEN - 1; i++)
if (kbinput == main_list[i].altval ||
kbinput == main_list[i].altval - 32) {
kbinput = main_list[i].val;
break;
}
#ifdef DEBUG
fprintf(stderr, _("I got Alt-%c! (%d)\n"), kbinput,
kbinput);
#endif
break;
}
}
/* Look through the main shortcut list to see if we've hit a
shortcut key */
for (i = 0; i < MAIN_LIST_LEN; i++) {
if (kbinput == main_list[i].val ||
(main_list[i].misc1 && kbinput == main_list[i].misc1) ||
(main_list[i].misc2 && kbinput == main_list[i].misc2)) {
if (ISSET(VIEW_MODE) && !main_list[i].viewok)
print_view_warning();
else
main_list[i].func();
keyhandled = 1;
}
}
/* Last gasp, stuff that's not in the main lists */
if (!keyhandled)
switch (kbinput) {
#ifndef NANO_SMALL
#ifdef NCURSES_MOUSE_VERSION
case KEY_MOUSE:
do_mouse();
break;
#endif
#endif
case 0: /* Erg */
do_next_word();
break;
case 331: /* Stuff that we don't want to do squat */
case -1:
case 410: /* Must ignore this, it gets sent when we resize */
break;
default:
#ifdef DEBUG
fprintf(stderr, "I got %c (%d)!\n", kbinput, kbinput);
#endif
/* We no longer stop unhandled sequences so that people with
odd character sets can type... */
if (ISSET(VIEW_MODE)) {
print_view_warning();
break;
}
do_char(kbinput);
}
if (ISSET(CONSTUPDATE))
do_cursorpos();
reset_cursor();
wrefresh(edit);
keyhandled = 0;
}
getchar();
finish(0);
}
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