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nano/nano.c
Chris Allegretta e10debd14b Updates by Ben Roberts 
git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@186 35c25a1d-7b9e-4130-9fde-d3aeb78583b8
2000-08-22 01:26:42 +00:00

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/* $Id$ */
/**************************************************************************
* 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 = "\0"; /* Last string we searched for */
char *last_replace = "\0"; /* Last replacement string */
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. */
if(filename[0] == '\0') {
write_file("nano.save", 0);
} else {
char buf[BUFSIZ];
strncpy(buf,filename,BUFSIZ);
strncat(buf,".save",BUFSIZ - strlen(buf));
write_file(buf, 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);
}
/* Null a string at a certain index and align it */
void null_at(char *data, int index)
{
data[index] = 0;
align(&data);
}
void usage(void)
{
#ifdef HAVE_GETOPT_LONG
printf(_("Usage: nano [GNU long option] [option] +LINE <file>\n\n"));
printf(_("Option Long option Meaning\n"));
printf(_
(" -T --tabsize=[num] Set width of a tab to num\n"));
#ifdef _POSIX_VERSION
printf(_
(" -R --regexp Use regular expressions for search\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"));
#ifndef NANO_SMALL
printf(_
(" -k --cut Let ^K cut from cursor to end of line\n"));
#endif
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"));
printf(_(" -T [num] Set width of a tab to num\n"));
printf(_(" -R Use regular expressions for search\n"));
printf(_(" -V Print version information and exit\n"));
printf(_(" -c Constantly show cursor position\n"));
printf(_(" -h Show this message\n"));
#ifndef NANO_SMALL
printf(_(" -k Let ^K cut from cursor to end of line\n"));
#endif
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;
}
/* Splice a node into an existing filestruct */
void splice_node(filestruct *begin, filestruct *new, filestruct *end)
{
new->next = end;
new->prev = begin;
begin->next = new;
if (end != NULL)
end->prev = new;
}
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)
{
/* magic-line: when a character is inserted on the current magic line,
* it means we need a new one! */
if(filebot == current && current->data[0] == '\0') {
new_magicline();
fix_editbot();
}
/* 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;
if (inptr->next == NULL) {
filebot = new;
editbot = new;
}
splice_node(inptr, new, inptr->next);
totsize++;
renumber(current);
current = new;
align(&current->data);
/* The logic here is as follows:
* -> If we are at the bottom of the buffer, we want to recenter
* (read: rebuild) the screen and forcably move the cursor.
* -> otherwise, we want simply to redraw the screen and update
* where we think the cursor is.
*/
if (current_y == editwinrows - 1) {
edit_update(current, CENTER);
reset_cursor();
} else {
current_y++;
edit_refresh();
update_cursor();
}
totlines++;
set_modified();
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, CENTER);
}
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;
}
/* 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;
}
null_at(inptr->data, current_x);
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;
null_at(inptr->data, current_word_start);
} 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++;
/* Everything about it makes me want this line here but it causes
* totsize to be high by one for some reason. Sigh. (Rob) */
/* totsize++; */
renumber(inptr);
edit_update(edittop, TOP);
/* 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(edittop, TOP);
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 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_center();
} 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;
/* Recreate the magic line if we're deleting it AND if the
line we're on now is NOT blank. if it is blank we
can just use IT for the magic line. This is how Pico
appears to do it, in any case */
if (strcmp(current->data, "")) {
new_magicline();
fix_editbot();
totsize++;
}
}
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);
/* Please see the comment in do_basckspace if you don't understand
this test */
if (current == filebot && strcmp(current->data, ""))
{
new_magicline();
fix_editbot();
totsize++;
}
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!"));
display_main_list();
}
/*
* 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();
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(); */
refresh();
free_filestruct(fileage);
global_init();
open_file(temp, 0, 1);
edit_update(fileage, CENTER);
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 (ISSET(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;
int foo = 0, tab_found = 0;
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;
placewewant = current_x;
while(foo < current_x) {
if(current->data[foo] == NANO_CONTROL_I) {
current_x -= tabsize - (foo % tabsize);
tab_found = 1;
} else if(current->data[foo] & 0x80)
;
else if(current->data[foo] < 32)
current_x--;
foo++;
}
/* This is where tab_found comes in. I can't figure out why,
* but without it any line with a tab will place the cursor
* one character behind. Whatever, this fixes it. */
if(tab_found == 1)
current_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 */
fix_editbot();
if (current_y > editwinrows - 1) {
edit_update(editbot, CENTER);
}
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);
}
totsize -= strlen(current->data);
justify_format(current->data);
slen = strlen(current->data);
totsize += slen;
if((strlenpt(current->data) > (fill))
&& !no_spaces(current->data)) {
do {
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++;
} while ((strlenpt(current->data) > (fill))
&& !no_spaces(current->data));
}
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);
center_cursor();
} else {
fix_editbot();
}
edit_refresh();
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", main_list[i].help);
strcat(help_text, buf);
strcat(help_text, "\n");
}
}
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;
char *argv0;
struct termios term;
#ifdef HAVE_GETOPT_LONG
int option_index = 0;
struct option long_options[] = {
#ifdef _POSIX_VERSION
{"regexp", 0, 0, 'R'},
#endif
{"version", 0, 0, 'V'},
{"const", 0, 0, 'c'},
{"suspend", 0, 0, 'z'},
{"nowrap", 0, 0, 'w'},
{"nohelp", 0, 0, 'x'},
{"help", 0, 0, 'h'},
#ifndef NANO_SMALL
{"cut", 0, 0, 'k'},
#endif
{"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'},
{"tabsize", 1, 0, 'T'},
{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:RVchiklmpr:s:tvwxz",
long_options, &option_index)) != EOF) {
#else
while ((optchr = getopt(argc, argv, "h?T:RVciklmpr:s:tvwxz")) != EOF) {
#endif
switch (optchr) {
case 'T':
tabsize = atoi(optarg);
if (tabsize <= 0) {
usage(); /* To stop bogus data for tab width */
finish(1);
}
break;
#ifdef _POSIX_VERSION
case 'R':
SET(USE_REGEXP);
break;
#endif
case 'V':
version();
exit(0);
case 'c':
SET(CONSTUPDATE);
break;
case 'h':
case '?':
usage();
exit(0);
case 'i':
SET(AUTOINDENT);
break;
#ifndef NANO_SMALL
case 'k':
SET(CUT_TO_END);
break;
#else
case 'k':
usage(); /* Oops! You dont really have that option */
finish(1);
#endif
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':
SET(TEMP_OPT);
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);
term = oldterm;
term.c_cc[VINTR] = _POSIX_VDISABLE;
term.c_cc[VQUIT] = _POSIX_VDISABLE;
term.c_lflag &= ~IEXTEN;
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, CENTER);
edit_refresh();
reset_cursor();
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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