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smol/src/nano.c

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/**************************************************************************
* nano.c -- This file is part of GNU nano. *
* *
* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, *
* 2008, 2009, 2010, 2011, 2013, 2014 Free Software Foundation, Inc. *
* Copyright (C) 2014, 2015, 2016 Benno Schulenberg *
* *
* GNU nano 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 3 of the License, *
* or (at your option) any later version. *
* *
* GNU nano 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, see http://www.gnu.org/licenses/. *
* *
**************************************************************************/
#include "proto.h"
#include "revision.h"
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <locale.h>
#ifdef ENABLE_UTF8
#include <langinfo.h>
#endif
#include <termios.h>
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#ifndef NANO_TINY
#include <sys/ioctl.h>
#endif
#ifndef DISABLE_MOUSE
static int oldinterval = -1;
/* Used to store the user's original mouse click interval. */
#endif
#ifndef DISABLE_NANORC
static bool no_rcfiles = FALSE;
/* Should we ignore all rcfiles? */
#endif
static struct termios oldterm;
/* The user's original terminal settings. */
static struct sigaction act;
/* Used to set up all our fun signal handlers. */
/* Create a new filestruct node. Note that we do not set prevnode->next
* to the new line. */
filestruct *make_new_node(filestruct *prevnode)
{
filestruct *newnode = (filestruct *)nmalloc(sizeof(filestruct));
newnode->data = NULL;
newnode->prev = prevnode;
newnode->next = NULL;
newnode->lineno = (prevnode != NULL) ? prevnode->lineno + 1 : 1;
#ifndef DISABLE_COLOR
newnode->multidata = NULL;
#endif
return newnode;
}
/* Make a copy of a filestruct node. */
filestruct *copy_node(const filestruct *src)
{
filestruct *dst;
dst = (filestruct *)nmalloc(sizeof(filestruct));
dst->data = mallocstrcpy(NULL, src->data);
dst->next = src->next;
dst->prev = src->prev;
dst->lineno = src->lineno;
#ifndef DISABLE_COLOR
dst->multidata = NULL;
#endif
return dst;
}
/* Splice a new node into an existing linked list of filestructs. */
void splice_node(filestruct *afterthis, filestruct *newnode)
{
newnode->next = afterthis->next;
newnode->prev = afterthis;
if (afterthis->next != NULL)
afterthis->next->prev = newnode;
afterthis->next = newnode;
/* Update filebot when inserting a node at the end of file. */
if (openfile && openfile->filebot == afterthis)
openfile->filebot = newnode;
}
/* Disconnect a node from a linked list of filestructs and delete it. */
void unlink_node(filestruct *fileptr)
{
if (fileptr->prev != NULL)
fileptr->prev->next = fileptr->next;
if (fileptr->next != NULL)
fileptr->next->prev = fileptr->prev;
/* Update filebot when removing a node at the end of file. */
if (openfile && openfile->filebot == fileptr)
openfile->filebot = fileptr->prev;
delete_node(fileptr);
}
/* Free the data structures in the given node. */
void delete_node(filestruct *fileptr)
{
free(fileptr->data);
#ifndef DISABLE_COLOR
free(fileptr->multidata);
#endif
free(fileptr);
}
/* Duplicate a whole filestruct. */
filestruct *copy_filestruct(const filestruct *src)
{
filestruct *head, *copy;
copy = copy_node(src);
copy->prev = NULL;
head = copy;
src = src->next;
while (src != NULL) {
copy->next = copy_node(src);
copy->next->prev = copy;
copy = copy->next;
src = src->next;
}
copy->next = NULL;
return head;
}
/* Free a whole linked list of filestructs. */
void free_filestruct(filestruct *src)
{
if (src == NULL)
return;
while (src->next != NULL) {
src = src->next;
delete_node(src->prev);
}
delete_node(src);
}
/* Renumber all entries in a filestruct, starting with fileptr. */
void renumber(filestruct *fileptr)
{
ssize_t line;
if (fileptr == NULL)
return;
line = (fileptr->prev == NULL) ? 0 : fileptr->prev->lineno;
assert(fileptr != fileptr->next);
for (; fileptr != NULL; fileptr = fileptr->next)
fileptr->lineno = ++line;
}
/* Partition a filestruct so that it begins at (top, top_x) and ends at
* (bot, bot_x). */
partition *partition_filestruct(filestruct *top, size_t top_x,
filestruct *bot, size_t bot_x)
{
partition *p;
assert(top != NULL && bot != NULL && openfile->fileage != NULL && openfile->filebot != NULL);
/* Initialize the partition. */
p = (partition *)nmalloc(sizeof(partition));
/* If the top and bottom of the partition are different from the top
* and bottom of the filestruct, save the latter and then set them
* to top and bot. */
if (top != openfile->fileage) {
p->fileage = openfile->fileage;
openfile->fileage = top;
} else
p->fileage = NULL;
if (bot != openfile->filebot) {
p->filebot = openfile->filebot;
openfile->filebot = bot;
} else
p->filebot = NULL;
/* Remember which line is above the top of the partition, detach the
* top of the partition from it, and save the text before top_x. */
p->top_prev = top->prev;
top->prev = NULL;
p->top_data = mallocstrncpy(NULL, top->data, top_x + 1);
p->top_data[top_x] = '\0';
/* Remember which line is below the bottom of the partition, detach the
* bottom of the partition from it, and save the text after bot_x. */
p->bot_next = bot->next;
bot->next = NULL;
p->bot_data = mallocstrcpy(NULL, bot->data + bot_x);
/* Remove all text after bot_x at the bottom of the partition. */
null_at(&bot->data, bot_x);
/* Remove all text before top_x at the top of the partition. */
charmove(top->data, top->data + top_x, strlen(top->data) - top_x + 1);
/* Return the partition. */
return p;
}
/* Unpartition a filestruct so that it begins at (fileage, 0) and ends
* at (filebot, strlen(filebot->data)) again. */
void unpartition_filestruct(partition **p)
{
assert(p != NULL && openfile->fileage != NULL && openfile->filebot != NULL);
/* Reattach the line above the top of the partition, and restore the
* text before top_x from top_data. Free top_data when we're done
* with it. */
openfile->fileage->prev = (*p)->top_prev;
if (openfile->fileage->prev != NULL)
openfile->fileage->prev->next = openfile->fileage;
openfile->fileage->data = charealloc(openfile->fileage->data,
strlen((*p)->top_data) + strlen(openfile->fileage->data) + 1);
charmove(openfile->fileage->data + strlen((*p)->top_data),
openfile->fileage->data, strlen(openfile->fileage->data) + 1);
strncpy(openfile->fileage->data, (*p)->top_data, strlen((*p)->top_data));
free((*p)->top_data);
/* Reattach the line below the bottom of the partition, and restore
* the text after bot_x from bot_data. Free bot_data when we're
* done with it. */
openfile->filebot->next = (*p)->bot_next;
if (openfile->filebot->next != NULL)
openfile->filebot->next->prev = openfile->filebot;
openfile->filebot->data = charealloc(openfile->filebot->data,
strlen(openfile->filebot->data) + strlen((*p)->bot_data) + 1);
strcat(openfile->filebot->data, (*p)->bot_data);
free((*p)->bot_data);
/* Restore the top and bottom of the filestruct, if they were
* different from the top and bottom of the partition. */
if ((*p)->fileage != NULL)
openfile->fileage = (*p)->fileage;
if ((*p)->filebot != NULL)
openfile->filebot = (*p)->filebot;
/* Uninitialize the partition. */
free(*p);
*p = NULL;
}
/* Move all the text between (top, top_x) and (bot, bot_x) in the
* current filestruct to a filestruct beginning with file_top and ending
* with file_bot. If no text is between (top, top_x) and (bot, bot_x),
* don't do anything. */
void move_to_filestruct(filestruct **file_top, filestruct **file_bot,
filestruct *top, size_t top_x, filestruct *bot, size_t bot_x)
{
filestruct *top_save;
bool edittop_inside;
#ifndef NANO_TINY
bool mark_inside = FALSE;
bool same_line = FALSE;
#endif
assert(file_top != NULL && file_bot != NULL && top != NULL && bot != NULL);
/* If (top, top_x)-(bot, bot_x) doesn't cover any text, get out. */
if (top == bot && top_x == bot_x)
return;
/* Partition the filestruct so that it contains only the text from
* (top, top_x) to (bot, bot_x), keep track of whether the top of
* the edit window is inside the partition, and keep track of
* whether the mark begins inside the partition. */
filepart = partition_filestruct(top, top_x, bot, bot_x);
edittop_inside = (openfile->edittop->lineno >= openfile->fileage->lineno &&
openfile->edittop->lineno <= openfile->filebot->lineno);
#ifndef NANO_TINY
if (openfile->mark_set) {
mark_inside = (openfile->mark_begin->lineno >=
openfile->fileage->lineno &&
openfile->mark_begin->lineno <=
openfile->filebot->lineno &&
(openfile->mark_begin != openfile->fileage ||
openfile->mark_begin_x >= top_x) &&
(openfile->mark_begin != openfile->filebot ||
openfile->mark_begin_x <= bot_x));
same_line = (openfile->mark_begin == openfile->fileage);
}
#endif
/* Subtract the number of characters in the text from the file size. */
openfile->totsize -= get_totsize(top, bot);
if (*file_top == NULL) {
/* If file_top is empty, just move all the text directly into
* it. This is equivalent to tacking the text in top onto the
* (lack of) text at the end of file_top. */
*file_top = openfile->fileage;
*file_bot = openfile->filebot;
/* Renumber, starting with file_top. */
renumber(*file_top);
} else {
filestruct *file_bot_save = *file_bot;
/* Otherwise, tack the text in top onto the text at the end of
* file_bot. */
(*file_bot)->data = charealloc((*file_bot)->data,
strlen((*file_bot)->data) +
strlen(openfile->fileage->data) + 1);
strcat((*file_bot)->data, openfile->fileage->data);
/* Attach the line after top to the line after file_bot. Then,
* if there's more than one line after top, move file_bot down
* to bot. */
(*file_bot)->next = openfile->fileage->next;
if ((*file_bot)->next != NULL) {
(*file_bot)->next->prev = *file_bot;
*file_bot = openfile->filebot;
}
delete_node(openfile->fileage);
/* Renumber, starting with the line after the original file_bot. */
renumber(file_bot_save->next);
}
/* Since the text has now been saved, remove it from the filestruct. */
openfile->fileage = (filestruct *)nmalloc(sizeof(filestruct));
openfile->fileage->data = mallocstrcpy(NULL, "");
openfile->filebot = openfile->fileage;
#ifndef DISABLE_COLOR
openfile->fileage->multidata = NULL;
#endif
/* Restore the current line and cursor position. If the mark begins
* inside the partition, set the beginning of the mark to where the
* saved text used to start. */
openfile->current = openfile->fileage;
openfile->current_x = top_x;
#ifndef NANO_TINY
if (mark_inside) {
openfile->mark_begin = openfile->current;
openfile->mark_begin_x = openfile->current_x;
} else if (same_line)
/* Update the pointer to this partially cut line. */
openfile->mark_begin = openfile->current;
#endif
top_save = openfile->fileage;
/* Unpartition the filestruct so that it contains all the text
* again, minus the saved text. */
unpartition_filestruct(&filepart);
/* If the top of the edit window was inside the old partition, put
* it in range of current. */
if (edittop_inside) {
adjust_viewport(STATIONARY);
refresh_needed = TRUE;
}
/* Renumber, starting with the beginning line of the old partition. */
renumber(top_save);
/* If the text doesn't end with a magicline, and it should, add one. */
if (!ISSET(NO_NEWLINES) && openfile->filebot->data[0] != '\0')
new_magicline();
}
/* Copy all text from the given filestruct to the current filestruct
* at the current cursor position. */
void copy_from_filestruct(filestruct *somebuffer)
{
filestruct *top_save;
size_t current_x_save = openfile->current_x;
bool edittop_inside;
#ifndef NANO_TINY
bool right_side_up = FALSE, single_line = FALSE;
#endif
assert(somebuffer != NULL);
#ifndef NANO_TINY
/* Keep track of whether the mark begins inside the partition and
* will need adjustment. */
if (openfile->mark_set) {
filestruct *top, *bot;
size_t top_x, bot_x;
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, &right_side_up);
single_line = (top == bot);
}
#endif
/* Partition the filestruct so that it contains no text, and remember
* whether the current line is at the top of the edit window. */
filepart = partition_filestruct(openfile->current, openfile->current_x,
openfile->current, openfile->current_x);
edittop_inside = (openfile->edittop == openfile->fileage);
free_filestruct(openfile->fileage);
/* Put the top and bottom of the current filestruct at the top and
* bottom of a copy of the passed buffer. */
openfile->fileage = copy_filestruct(somebuffer);
openfile->filebot = openfile->fileage;
while (openfile->filebot->next != NULL)
openfile->filebot = openfile->filebot->next;
/* Put the cursor at the end of the pasted text. */
openfile->current = openfile->filebot;
openfile->current_x = strlen(openfile->filebot->data);
/* Refresh the mark's pointer, and compensate the mark's
* x coordinate for the change in the current line. */
if (openfile->fileage == openfile->filebot) {
#ifndef NANO_TINY
if (openfile->mark_set && single_line) {
openfile->mark_begin = openfile->current;
if (!right_side_up)
openfile->mark_begin_x += openfile->current_x;
}
#endif
/* When the pasted stuff contains no newline, adjust the cursor's
* x coordinate for the text that is before the pasted stuff. */
openfile->current_x += current_x_save;
}
#ifndef NANO_TINY
else if (openfile->mark_set && single_line) {
if (right_side_up)
openfile->mark_begin = openfile->fileage;
else {
openfile->mark_begin = openfile->current;
openfile->mark_begin_x += openfile->current_x - current_x_save;
}
}
#endif
/* Add the number of characters in the copied text to the file size. */
openfile->totsize += get_totsize(openfile->fileage, openfile->filebot);
/* Update the current y-coordinate to account for the number of
* lines the copied text has, less one since the first line will be
* tacked onto the current line. */
openfile->current_y += openfile->filebot->lineno - 1;
/* If we pasted onto the first line of the edit window, the corresponding
* struct has been freed, so... point at the start of the copied text. */
if (edittop_inside)
openfile->edittop = openfile->fileage;
top_save = openfile->fileage;
/* Unpartition the filestruct so that it contains all the text
* again, plus the copied text. */
unpartition_filestruct(&filepart);
/* Renumber, starting with the beginning line of the old partition. */
renumber(top_save);
/* If the text doesn't end with a magicline, and it should, add one. */
if (!ISSET(NO_NEWLINES) && openfile->filebot->data[0] != '\0')
new_magicline();
}
/* Create a new openfilestruct node. */
openfilestruct *make_new_opennode(void)
{
return (openfilestruct *)nmalloc(sizeof(openfilestruct));
}
/* Unlink a node from the rest of the openfilestruct, and delete it. */
void unlink_opennode(openfilestruct *fileptr)
{
assert(fileptr != fileptr->prev && fileptr != fileptr->next);
fileptr->prev->next = fileptr->next;
fileptr->next->prev = fileptr->prev;
delete_opennode(fileptr);
}
/* Free all the memory in the given open-file node. */
void delete_opennode(openfilestruct *fileptr)
{
free(fileptr->filename);
free_filestruct(fileptr->fileage);
#ifndef NANO_TINY
free(fileptr->current_stat);
free(fileptr->lock_filename);
/* Free the undo stack. */
discard_until(NULL, fileptr);
#endif
free(fileptr);
}
/* Display a warning about a key disabled in view mode. */
void print_view_warning(void)
{
statusbar(_("Key is invalid in view mode"));
}
/* Indicate that something is disabled in restricted mode. */
void show_restricted_warning(void)
{
statusbar(_("This function is disabled in restricted mode"));
beep();
}
#ifdef DISABLE_HELP
/* Indicate that help texts are unavailable. */
void say_there_is_no_help(void)
{
statusbar(_("Help is not available"));
}
#endif
/* Make nano exit gracefully. */
void finish(void)
{
/* Blank the statusbar and (if applicable) the shortcut list,
* and move the cursor to the last line of the screen. */
blank_statusbar();
blank_bottombars();
wrefresh(bottomwin);
endwin();
/* Restore the old terminal settings. */
tcsetattr(0, TCSANOW, &oldterm);
#ifndef DISABLE_HISTORIES
if (ISSET(HISTORYLOG))
save_history();
if (ISSET(POS_HISTORY)) {
update_poshistory(openfile->filename, openfile->current->lineno, xplustabs() + 1);
save_poshistory();
}
#endif
#ifdef DEBUG
thanks_for_all_the_fish();
#endif
/* Get out. */
exit(0);
}
/* Make nano die gracefully. */
void die(const char *msg, ...)
{
va_list ap;
endwin();
/* Restore the old terminal settings. */
tcsetattr(0, TCSANOW, &oldterm);
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
#ifndef NANO_TINY
/* If the current buffer has a lockfile, remove it. */
if (openfile && ISSET(LOCKING) && openfile->lock_filename)
delete_lockfile(openfile->lock_filename);
#endif
/* If the current file buffer was modified, save it. */
if (openfile && openfile->modified) {
/* If the filestruct is partitioned, unpartition it first. */
if (filepart != NULL)
unpartition_filestruct(&filepart);
die_save_file(openfile->filename, openfile->current_stat);
}
#ifndef DISABLE_MULTIBUFFER
/* Save all of the other modified file buffers, if any. */
if (openfile != NULL) {
openfilestruct *firstone = openfile;
while (openfile->next != firstone) {
openfile = openfile->next;
#ifndef NANO_TINY
if (ISSET(LOCKING) && openfile->lock_filename)
delete_lockfile(openfile->lock_filename);
#endif
if (openfile->modified)
die_save_file(openfile->filename, openfile->current_stat);
}
}
#endif
/* Abandon the building. */
exit(1);
}
/* Save the current file under the name specified in die_filename, which
* is modified to be unique if necessary. */
void die_save_file(const char *die_filename, struct stat *die_stat)
{
char *targetname;
bool failed = TRUE;
/* If we're using restricted mode, don't write any emergency backup
* files, since that would allow reading from or writing to files
* not specified on the command line. */
if (ISSET(RESTRICTED))
return;
/* If we can't save, we have really bad problems, but we might as
* well try. */
if (*die_filename == '\0')
die_filename = "nano";
targetname = get_next_filename(die_filename, ".save");
if (*targetname != '\0')
failed = !write_file(targetname, NULL, TRUE, OVERWRITE, TRUE);
if (!failed)
fprintf(stderr, _("\nBuffer written to %s\n"), targetname);
else if (*targetname != '\0')
fprintf(stderr, _("\nBuffer not written to %s: %s\n"), targetname,
strerror(errno));
else
fprintf(stderr, _("\nBuffer not written: %s\n"),
_("Too many backup files?"));
#ifndef NANO_TINY
/* Try and chmod/chown the save file to the values of the original file,
* but don't worry if it fails because we're supposed to be bailing as
* fast as possible. */
if (die_stat) {
IGNORE_CALL_RESULT(chmod(targetname, die_stat->st_mode));
IGNORE_CALL_RESULT(chown(targetname, die_stat->st_uid,
die_stat->st_gid));
}
#endif
free(targetname);
}
/* Initialize the three window portions nano uses. */
void window_init(void)
{
/* First delete existing windows, in case of resizing. */
delwin(topwin);
topwin = NULL;
delwin(edit);
delwin(bottomwin);
/* If the terminal is very flat, don't set up a titlebar. */
if (LINES < 3) {
editwinrows = 1;
/* Set up two subwindows. If the terminal is just one line,
* edit window and statusbar window will cover each other. */
edit = newwin(1, COLS, 0, 0);
bottomwin = newwin(1, COLS, LINES - 1, 0);
} else {
int toprows = (ISSET(MORE_SPACE) ? 1 : (LINES < 6) ? 1 : 2);
int bottomrows = (ISSET(NO_HELP) ? 1 : (LINES < 5) ? 1 : 3);
editwinrows = LINES - toprows - bottomrows;
/* Set up the normal three subwindows. */
topwin = newwin(toprows, COLS, 0, 0);
edit = newwin(editwinrows, COLS, toprows, 0);
bottomwin = newwin(bottomrows, COLS, toprows + editwinrows, 0);
}
/* In case the terminal shrunk, make sure the status line is clear. */
blank_statusbar();
wnoutrefresh(bottomwin);
/* Turn the keypad on for the windows, if necessary. */
if (!ISSET(REBIND_KEYPAD)) {
keypad(topwin, TRUE);
keypad(edit, TRUE);
keypad(bottomwin, TRUE);
}
#ifndef DISABLE_WRAPJUSTIFY
/* Set up the wrapping point, accounting for screen width when negative. */
fill = wrap_at;
if (fill <= 0)
fill += COLS;
if (fill < 0)
fill = 0;
#endif
}
#ifndef DISABLE_MOUSE
/* Disable mouse support. */
void disable_mouse_support(void)
{
mousemask(0, NULL);
mouseinterval(oldinterval);
}
/* Enable mouse support. */
void enable_mouse_support(void)
{
mousemask(ALL_MOUSE_EVENTS, NULL);
oldinterval = mouseinterval(50);
}
/* Initialize mouse support. Enable it if the USE_MOUSE flag is set,
* and disable it otherwise. */
void mouse_init(void)
{
if (ISSET(USE_MOUSE))
enable_mouse_support();
else
disable_mouse_support();
}
#endif /* !DISABLE_MOUSE */
#ifdef HAVE_GETOPT_LONG
#define print_opt(shortflag, longflag, desc) print_opt_full(shortflag, longflag, desc)
#else
#define print_opt(shortflag, longflag, desc) print_opt_full(shortflag, desc)
#endif
/* Print one usage string to the screen. This cuts down on duplicate
* strings to translate, and leaves out the parts that shouldn't be
* translatable (i.e. the flag names). */
void print_opt_full(const char *shortflag
#ifdef HAVE_GETOPT_LONG
, const char *longflag
#endif
, const char *desc)
{
printf(" %s\t", shortflag);
if (strlenpt(shortflag) < 8)
printf("\t");
#ifdef HAVE_GETOPT_LONG
printf("%s\t", longflag);
if (strlenpt(longflag) < 8)
printf("\t\t");
else if (strlenpt(longflag) < 16)
printf("\t");
#endif
if (desc != NULL)
printf("%s", _(desc));
printf("\n");
}
/* Explain how to properly use nano and its command-line options. */
void usage(void)
{
printf(_("Usage: nano [OPTIONS] [[+LINE,COLUMN] FILE]...\n\n"));
#ifdef HAVE_GETOPT_LONG
printf(_("Option\t\tGNU long option\t\tMeaning\n"));
#else
printf(_("Option\t\tMeaning\n"));
#endif
print_opt(_("+LINE,COLUMN"), "",
/* TRANSLATORS: The next forty or so strings are option descriptions
* for the --help output. Try to keep them at most 40 characters. */
N_("Start at line LINE, column COLUMN"));
#ifndef NANO_TINY
print_opt("-A", "--smarthome", N_("Enable smart home key"));
if (!ISSET(RESTRICTED)) {
print_opt("-B", "--backup", N_("Save backups of existing files"));
print_opt(_("-C <dir>"), _("--backupdir=<dir>"),
N_("Directory for saving unique backup files"));
}
#endif
print_opt("-D", "--boldtext", N_("Use bold instead of reverse video text"));
#ifndef NANO_TINY
print_opt("-E", "--tabstospaces", N_("Convert typed tabs to spaces"));
#endif
#ifndef DISABLE_MULTIBUFFER
if (!ISSET(RESTRICTED))
print_opt("-F", "--multibuffer",
N_("Read a file into a new buffer by default"));
#endif
#ifndef NANO_TINY
print_opt("-G", "--locking", N_("Use (vim-style) lock files"));
#endif
#ifndef DISABLE_HISTORIES
if (!ISSET(RESTRICTED))
print_opt("-H", "--historylog",
N_("Log & read search/replace string history"));
#endif
#ifndef DISABLE_NANORC
if (!ISSET(RESTRICTED))
print_opt("-I", "--ignorercfiles", N_("Don't look at nanorc files"));
#endif
print_opt("-K", "--rebindkeypad",
N_("Fix numeric keypad key confusion problem"));
print_opt("-L", "--nonewlines",
N_("Don't add newlines to the ends of files"));
#ifndef NANO_TINY
print_opt("-N", "--noconvert",
N_("Don't convert files from DOS/Mac format"));
#endif
print_opt("-O", "--morespace", N_("Use one more line for editing"));
#ifndef DISABLE_HISTORIES
if (!ISSET(RESTRICTED))
print_opt("-P", "--positionlog",
N_("Log & read location of cursor position"));
#endif
#ifndef DISABLE_JUSTIFY
print_opt(_("-Q <str>"), _("--quotestr=<str>"), N_("Quoting string"));
#endif
if (!ISSET(RESTRICTED))
print_opt("-R", "--restricted", N_("Restricted mode"));
#ifndef NANO_TINY
print_opt("-S", "--smooth", N_("Scroll by line instead of half-screen"));
#endif
print_opt(_("-T <#cols>"), _("--tabsize=<#cols>"),
N_("Set width of a tab to #cols columns"));
#ifndef NANO_TINY
print_opt("-U", "--quickblank", N_("Do quick statusbar blanking"));
#endif
print_opt("-V", "--version", N_("Print version information and exit"));
#ifndef NANO_TINY
print_opt("-W", "--wordbounds",
N_("Detect word boundaries more accurately"));
print_opt(_("-X <str>"), _("--wordchars=<str>"),
N_("Which other characters are word parts"));
#endif
#ifndef DISABLE_COLOR
if (!ISSET(RESTRICTED))
print_opt(_("-Y <str>"), _("--syntax=<str>"),
N_("Syntax definition to use for coloring"));
#endif
print_opt("-c", "--constantshow", N_("Constantly show cursor position"));
print_opt("-d", "--rebinddelete",
N_("Fix Backspace/Delete confusion problem"));
print_opt("-h", "--help", N_("Show this help text and exit"));
#ifndef NANO_TINY
print_opt("-i", "--autoindent", N_("Automatically indent new lines"));
print_opt("-k", "--cut", N_("Cut from cursor to end of line"));
#endif
#ifdef ENABLE_LINENUMBERS
print_opt("-l", "--linenumbers", N_("Show line numbers in front of the text"));
#endif
#ifndef DISABLE_MOUSE
print_opt("-m", "--mouse", N_("Enable the use of the mouse"));
#endif
print_opt("-n", "--noread", N_("Do not read the file (only write it)"));
#ifndef DISABLE_OPERATINGDIR
print_opt(_("-o <dir>"), _("--operatingdir=<dir>"),
N_("Set operating directory"));
#endif
print_opt("-p", "--preserve", N_("Preserve XON (^Q) and XOFF (^S) keys"));
#ifndef DISABLE_NANORC
if (!ISSET(RESTRICTED))
print_opt("-q", "--quiet",
N_("Silently ignore startup issues like rc file errors"));
#endif
#ifndef DISABLE_WRAPJUSTIFY
print_opt(_("-r <#cols>"), _("--fill=<#cols>"),
N_("Set hard-wrapping point at column #cols"));
#endif
#ifndef DISABLE_SPELLER
if (!ISSET(RESTRICTED))
print_opt(_("-s <prog>"), _("--speller=<prog>"),
N_("Enable alternate speller"));
#endif
print_opt("-t", "--tempfile", N_("Auto save on exit, don't prompt"));
#ifndef NANO_TINY
print_opt("-u", "--unix", N_("Save a file by default in Unix format"));
#endif
print_opt("-v", "--view", N_("View mode (read-only)"));
#ifndef DISABLE_WRAPPING
print_opt("-w", "--nowrap", N_("Don't hard-wrap long lines"));
#endif
print_opt("-x", "--nohelp", N_("Don't show the two help lines"));
if (!ISSET(RESTRICTED))
print_opt("-z", "--suspend", N_("Enable suspension"));
#ifndef NANO_TINY
print_opt("-$", "--softwrap", N_("Enable soft line wrapping"));
#endif
}
/* Display the current version of nano, the date and time it was
* compiled, contact information for it, and the configuration options
* it was compiled with. */
void version(void)
{
#ifdef REVISION
printf(" GNU nano from git, %s\n", REVISION);
#else
printf(_(" GNU nano, version %s\n"), VERSION);
#endif
printf(" (C) 1999..2016 Free Software Foundation, Inc.\n");
printf(_(" (C) 2014..%s the contributors to nano\n"), "2016");
printf(
_(" Email: nano@nano-editor.org Web: https://nano-editor.org/"));
printf(_("\n Compiled options:"));
#ifdef NANO_TINY
printf(" --enable-tiny");
#ifndef DISABLE_BROWSER
printf(" --enable-browser");
#endif
#ifndef DISABLE_COLOR
printf(" --enable-color");
#endif
#ifndef DISABLE_EXTRA
printf(" --enable-extra");
#endif
#ifndef DISABLE_HELP
printf(" --enable-help");
#endif
#ifndef DISABLE_HISTORIES
printf(" --enable-histories");
#endif
#ifndef DISABLE_JUSTIFY
printf(" --enable-justify");
#endif
#ifdef HAVE_LIBMAGIC
printf(" --enable-libmagic");
#endif
#ifdef ENABLE_LINENUMBERS
printf(" --enable-linenumbers");
#endif
#ifndef DISABLE_MOUSE
printf(" --enable-mouse");
#endif
#ifndef DISABLE_NANORC
printf(" --enable-nanorc");
#endif
#ifndef DISABLE_MULTIBUFFER
printf(" --enable-multibuffer");
#endif
#ifndef DISABLE_OPERATINGDIR
printf(" --enable-operatingdir");
#endif
#ifndef DISABLE_SPELLER
printf(" --enable-speller");
#endif
#ifndef DISABLE_TABCOMP
printf(" --enable-tabcomp");
#endif
#ifndef DISABLE_WRAPPING
printf(" --enable-wrapping");
#endif
#else /* !NANO_TINY */
#ifdef DISABLE_BROWSER
printf(" --disable-browser");
#endif
#ifdef DISABLE_COLOR
printf(" --disable-color");
#endif
#ifndef ENABLE_COMMENT
printf(" --disable-comment");
#endif
#ifdef DISABLE_EXTRA
printf(" --disable-extra");
#endif
#ifdef DISABLE_HELP
printf(" --disable-help");
#endif
#ifdef DISABLE_HISTORIES
printf(" --disable-histories");
#endif
#ifdef DISABLE_JUSTIFY
printf(" --disable-justify");
#endif
#ifndef HAVE_LIBMAGIC
printf(" --disable-libmagic");
#endif
#ifndef ENABLE_LINENUMBERS
printf(" --disable-linenumbers");
#endif
#ifdef DISABLE_MOUSE
printf(" --disable-mouse");
#endif
#ifdef DISABLE_MULTIBUFFER
printf(" --disable-multibuffer");
#endif
#ifdef DISABLE_NANORC
printf(" --disable-nanorc");
#endif
#ifdef DISABLE_OPERATINGDIR
printf(" --disable-operatingdir");
#endif
#ifdef DISABLE_SPELLER
printf(" --disable-speller");
#endif
#ifdef DISABLE_TABCOMP
printf(" --disable-tabcomp");
#endif
#ifndef ENABLE_WORDCOMPLETION
printf(" --disable-wordcomp");
#endif
#ifdef DISABLE_WRAPPING
printf(" --disable-wrapping");
#endif
#endif /* !NANO_TINY */
#ifdef DISABLE_ROOTWRAPPING
printf(" --disable-wrapping-as-root");
#endif
#ifdef DEBUG
printf(" --enable-debug");
#endif
#ifndef ENABLE_NLS
printf(" --disable-nls");
#endif
#ifdef ENABLE_UTF8
printf(" --enable-utf8");
#else
printf(" --disable-utf8");
#endif
#ifdef USE_SLANG
printf(" --with-slang");
#endif
printf("\n");
}
/* If the current file buffer has been modified, and the TEMP_FILE flag
* isn't set, ask whether or not to save the file buffer. If the
* TEMP_FILE flag is set and the current file has a name, save it
* unconditionally. Then, if more than one file buffer is open, close
* the current file buffer and switch to the next one. If only one file
* buffer is open, exit from nano. */
void do_exit(void)
{
int i;
/* If the file hasn't been modified, pretend the user chose not to
* save. */
if (!openfile->modified)
i = 0;
/* If the TEMP_FILE flag is set and the current file has a name,
* pretend the user chose to save. */
else if (openfile->filename[0] != '\0' && ISSET(TEMP_FILE))
i = 1;
/* Otherwise, ask the user whether or not to save. */
else {
/* If the TEMP_FILE flag is set, and the current file doesn't
* have a name, warn the user before prompting for a name. */
if (ISSET(TEMP_FILE))
warn_and_shortly_pause(_("No file name"));
i = do_yesno_prompt(FALSE, _("Save modified buffer? "
"(Answering \"No\" will DISCARD changes.) "));
}
#ifdef DEBUG
dump_filestruct(openfile->fileage);
#endif
/* If the user chose not to save, or if the user chose to save and
* the save succeeded, we're ready to exit. */
if (i == 0 || (i == 1 && do_writeout(TRUE)))
close_and_go();
else if (i != 1)
statusbar(_("Cancelled"));
}
/* Close the current buffer, and terminate nano if it was the last. */
void close_and_go(void)
{
#ifndef NANO_TINY
/* If there is a lockfile, remove it. */
if (ISSET(LOCKING) && openfile->lock_filename)
delete_lockfile(openfile->lock_filename);
#endif
#ifndef DISABLE_MULTIBUFFER
/* If there are no more open file buffers, jump off a cliff. */
if (!close_buffer())
#endif
finish();
}
/* Another placeholder for function mapping. */
void do_cancel(void)
{
;
}
static struct sigaction pager_oldaction, pager_newaction;
/* Original and temporary handlers for SIGINT. */
static bool pager_sig_failed = FALSE;
/* Did sigaction() fail without changing the signal handlers? */
static bool pager_input_aborted = FALSE;
/* Did someone invoke the pager and abort it via ^C? */
/* Things which need to be run regardless of whether
* we finished the stdin pipe correctly or not. */
void finish_stdin_pager(void)
{
FILE *f;
int ttystdin;
/* Read whatever we did get from stdin. */
f = fopen("/dev/stdin", "rb");
if (f == NULL)
nperror("fopen");
read_file(f, 0, "stdin", TRUE, FALSE);
openfile->edittop = openfile->fileage;
ttystdin = open("/dev/tty", O_RDONLY);
if (!ttystdin)
die(_("Couldn't reopen stdin from keyboard, sorry\n"));
dup2(ttystdin,0);
close(ttystdin);
if (!pager_input_aborted)
tcgetattr(0, &oldterm);
if (!pager_sig_failed && sigaction(SIGINT, &pager_oldaction, NULL) == -1)
nperror("sigaction");
terminal_init();
doupdate();
}
/* Cancel reading from stdin like a pager. */
RETSIGTYPE cancel_stdin_pager(int signal)
{
pager_input_aborted = TRUE;
}
/* Let nano read stdin for the first file at least. */
void stdin_pager(void)
{
endwin();
if (!pager_input_aborted)
tcsetattr(0, TCSANOW, &oldterm);
fprintf(stderr, _("Reading from stdin, ^C to abort\n"));
#ifndef NANO_TINY
/* Enable interpretation of the special control keys so that
* we get SIGINT when Ctrl-C is pressed. */
enable_signals();
#endif
/* Set things up so that SIGINT will cancel the new process. */
if (sigaction(SIGINT, NULL, &pager_newaction) == -1) {
pager_sig_failed = TRUE;
nperror("sigaction");
} else {
pager_newaction.sa_handler = cancel_stdin_pager;
if (sigaction(SIGINT, &pager_newaction, &pager_oldaction) == -1) {
pager_sig_failed = TRUE;
nperror("sigaction");
}
}
open_buffer("", FALSE);
finish_stdin_pager();
}
/* Initialize the signal handlers. */
void signal_init(void)
{
/* Trap SIGINT and SIGQUIT because 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);
/* Trap SIGHUP and SIGTERM because we want to write the file out. */
act.sa_handler = handle_hupterm;
sigaction(SIGHUP, &act, NULL);
sigaction(SIGTERM, &act, NULL);
#ifndef NANO_TINY
/* Trap SIGWINCH because we want to handle window resizes. */
act.sa_handler = handle_sigwinch;
sigaction(SIGWINCH, &act, NULL);
#endif
/* Trap normal suspend (^Z) so we can handle it ourselves. */
if (!ISSET(SUSPEND)) {
act.sa_handler = SIG_IGN;
sigaction(SIGTSTP, &act, NULL);
} else {
/* Block all other signals in the suspend and continue handlers.
* If we don't do this, other stuff interrupts them! */
sigfillset(&act.sa_mask);
act.sa_handler = do_suspend;
sigaction(SIGTSTP, &act, NULL);
act.sa_handler = do_continue;
sigaction(SIGCONT, &act, NULL);
}
}
/* Handler for SIGHUP (hangup) and SIGTERM (terminate). */
RETSIGTYPE handle_hupterm(int signal)
{
die(_("Received SIGHUP or SIGTERM\n"));
}
/* Handler for SIGTSTP (suspend). */
RETSIGTYPE do_suspend(int signal)
{
#ifndef DISABLE_MOUSE
/* Turn mouse support off. */
disable_mouse_support();
#endif
/* Move the cursor to the last line of the screen. */
move(LINES - 1, 0);
endwin();
/* Display our helpful message. */
printf(_("Use \"fg\" to return to nano.\n"));
fflush(stdout);
/* Restore the old terminal settings. */
tcsetattr(0, TCSANOW, &oldterm);
/* Trap SIGHUP and SIGTERM so we can properly deal with them while
* suspended. */
act.sa_handler = handle_hupterm;
sigaction(SIGHUP, &act, NULL);
sigaction(SIGTERM, &act, NULL);
/* Do what mutt does: send ourselves a SIGSTOP. */
kill(0, SIGSTOP);
}
/* The version of above function that is bound to a key. */
void do_suspend_void(void)
{
if (ISSET(SUSPEND))
do_suspend(0);
else {
statusbar(_("Suspension is not enabled"));
beep();
}
}
/* Handler for SIGCONT (continue after suspend). */
RETSIGTYPE do_continue(int signal)
{
#ifndef DISABLE_MOUSE
/* Turn mouse support back on if it was on before. */
if (ISSET(USE_MOUSE))
enable_mouse_support();
#endif
#ifndef NANO_TINY
/* Perhaps the user resized the window while we slept. So act as if,
* and restore the terminal to its previous state in the process. */
regenerate_screen();
#else
/* Restore the state of the terminal and redraw the whole screen. */
terminal_init();
total_refresh();
#endif
}
#ifndef NANO_TINY
/* Handler for SIGWINCH (window size change). */
RETSIGTYPE handle_sigwinch(int signal)
{
/* Let the input routine know that a SIGWINCH has occurred. */
sigwinch_counter++;
}
/* Reinitialize and redraw the screen completely. */
void regenerate_screen(void)
{
const char *tty = ttyname(0);
int fd, result = 0;
struct winsize win;
if (tty == NULL)
return;
fd = open(tty, O_RDWR);
if (fd == -1)
return;
result = ioctl(fd, TIOCGWINSZ, &win);
close(fd);
if (result == -1)
return;
/* We could check whether the COLS or LINES changed, and return
* otherwise. However, COLS and LINES are curses global variables,
* and in some cases curses has already updated them. But not in
* all cases. Argh. */
#ifdef REDEFINING_MACROS_OK
COLS = win.ws_col;
LINES = win.ws_row;
#endif
editwincols = COLS - margin;
#ifdef USE_SLANG
/* Slang curses emulation brain damage, part 1: If we just do what
* curses does here, it'll only work properly if the resize made the
* window smaller. Do what mutt does: Leave and immediately reenter
* Slang screen management mode. */
SLsmg_reset_smg();
SLsmg_init_smg();
#else
/* Do the equivalent of what Minimum Profit does: Leave and
* immediately reenter curses mode. */
endwin();
doupdate();
#endif
/* Restore the terminal to its previous state. */
terminal_init();
/* Do the equivalent of what both mutt and Minimum Profit do:
* Reinitialize all the windows based on the new screen
* dimensions. */
window_init();
/* Redraw the contents of the windows that need it. */
total_refresh();
}
/* If allow is FALSE, block any SIGWINCH signal. If allow is TRUE,
* unblock SIGWINCH so any pending ones can be dealt with. */
void allow_sigwinch(bool allow)
{
sigset_t winch;
sigemptyset(&winch);
sigaddset(&winch, SIGWINCH);
sigprocmask(allow ? SIG_UNBLOCK : SIG_BLOCK, &winch, NULL);
}
#endif /* !NANO_TINY */
#ifndef NANO_TINY
/* Handle the global toggle specified in flag. */
void do_toggle(int flag)
{
bool enabled;
if (ISSET(RESTRICTED) && (flag == SUSPEND || flag == MULTIBUFFER ||
flag == BACKUP_FILE || flag == NO_COLOR_SYNTAX)) {
show_restricted_warning();
return;
}
TOGGLE(flag);
switch (flag) {
#ifndef DISABLE_MOUSE
case USE_MOUSE:
mouse_init();
break;
#endif
case MORE_SPACE:
case NO_HELP:
window_init();
total_refresh();
break;
case SUSPEND:
signal_init();
break;
case WHITESPACE_DISPLAY:
titlebar(NULL); /* Fall through. */
#ifndef DISABLE_COLOR
case NO_COLOR_SYNTAX:
#endif
#ifdef ENABLE_LINENUMBERS
case LINE_NUMBERS:
#endif
case SOFTWRAP:
refresh_needed = TRUE;
break;
}
enabled = ISSET(flag);
if (flag == NO_HELP || flag == NO_WRAP || flag == NO_COLOR_SYNTAX)
enabled = !enabled;
statusline(HUSH, "%s %s", _(flagtostr(flag)),
enabled ? _("enabled") : _("disabled"));
}
/* Bleh. */
void do_toggle_void(void)
{
;
}
#endif /* !NANO_TINY */
/* Disable extended input and output processing in our terminal
* settings. */
void disable_extended_io(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag &= ~IEXTEN;
term.c_oflag &= ~OPOST;
tcsetattr(0, TCSANOW, &term);
}
/* Disable interpretation of the special control keys in our terminal
* settings. */
void disable_signals(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag &= ~ISIG;
tcsetattr(0, TCSANOW, &term);
}
#ifndef NANO_TINY
/* Enable interpretation of the special control keys in our terminal
* settings. */
void enable_signals(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag |= ISIG;
tcsetattr(0, TCSANOW, &term);
}
#endif
/* Disable interpretation of the flow control characters in our terminal
* settings. */
void disable_flow_control(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_iflag &= ~IXON;
tcsetattr(0, TCSANOW, &term);
}
/* Enable interpretation of the flow control characters in our terminal
* settings. */
void enable_flow_control(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_iflag |= IXON;
tcsetattr(0, TCSANOW, &term);
}
/* Set up the terminal state. Put the terminal in raw mode (read one
* character at a time, disable the special control keys, and disable
* the flow control characters), disable translation of carriage return
* (^M) into newline (^J) so that we can tell the difference between the
* Enter key and Ctrl-J, and disable echoing of characters as they're
* typed. Finally, disable extended input and output processing, and,
* if we're not in preserve mode, reenable interpretation of the flow
* control characters. */
void terminal_init(void)
{
#ifdef USE_SLANG
/* Slang curses emulation brain damage, part 2: Slang doesn't
* implement raw(), nonl(), or noecho() properly, so there's no way
* to properly reinitialize the terminal using them. We have to
* disable the special control keys and interpretation of the flow
* control characters using termios, save the terminal state after
* the first call, and restore it on subsequent calls. */
static struct termios newterm;
static bool newterm_set = FALSE;
if (!newterm_set) {
#endif
raw();
nonl();
noecho();
disable_extended_io();
if (ISSET(PRESERVE))
enable_flow_control();
disable_signals();
#ifdef USE_SLANG
if (!ISSET(PRESERVE))
disable_flow_control();
tcgetattr(0, &newterm);
newterm_set = TRUE;
} else
tcsetattr(0, TCSANOW, &newterm);
#endif
}
/* Ask ncurses for a keycode, or assign a default one. */
int get_keycode(const char *keyname, const int standard)
{
#ifdef HAVE_KEY_DEFINED
const char *keyvalue = tigetstr(keyname);
if (keyvalue != 0 && keyvalue != (char *)-1)
return key_defined(keyvalue);
else
#endif
return standard;
}
/* Say that an unbound key was struck, and if possible which one. */
void unbound_key(int code)
{
if (!is_byte(code))
statusline(ALERT, _("Unbound key"));
else if (meta_key) {
if (code == '[')
statusline(ALERT, _("Unbindable key: M-["));
else
statusline(ALERT, _("Unbound key: M-%c"), toupper(code));
} else if (code < 0x20)
statusline(ALERT, _("Unbound key: ^%c"), code + 0x40);
else
statusline(ALERT, _("Unbound key: %c"), code);
}
/* Read in a keystroke. Act on the keystroke if it is a shortcut or a toggle;
* otherwise, insert it into the edit buffer. If allow_funcs is FALSE, don't
* do anything with the keystroke -- just return it. */
int do_input(bool allow_funcs)
{
int input;
/* The keystroke we read in: a character or a shortcut. */
static char *puddle = NULL;
/* The input buffer for actual characters. */
static size_t depth = 0;
/* The length of the input buffer. */
bool preserve = FALSE;
/* Whether to preserve the contents of the cutbuffer. */
const sc *s;
bool have_shortcut;
/* Read in a keystroke. */
input = get_kbinput(edit);
#ifndef NANO_TINY
if (input == KEY_WINCH)
return KEY_WINCH;
#endif
#ifndef DISABLE_MOUSE
if (input == KEY_MOUSE) {
/* We received a mouse click. */
if (do_mouse() == 1)
/* The click was on a shortcut -- read in the character
* that it was converted into. */
input = get_kbinput(edit);
else
/* The click was invalid or has been handled -- get out. */
return ERR;
}
#endif
/* Check for a shortcut in the main list. */
s = get_shortcut(&input);
/* If we got a shortcut from the main list, or a "universal"
* edit window shortcut, set have_shortcut to TRUE. */
have_shortcut = (s != NULL);
/* If we got a non-high-bit control key, a meta key sequence, or a
* function key, and it's not a shortcut or toggle, throw it out. */
if (!have_shortcut) {
if (is_ascii_cntrl_char(input) || meta_key || !is_byte(input)) {
unbound_key(input);
input = ERR;
}
}
if (!allow_funcs)
return input;
/* If the keystroke isn't a shortcut nor a toggle, it's a normal text
* character: add the character to the input buffer -- or display a
* warning when we're in view mode. */
if (input != ERR && !have_shortcut) {
if (ISSET(VIEW_MODE))
print_view_warning();
else {
/* Store the byte, and leave room for a terminating zero. */
puddle = charealloc(puddle, depth + 2);
puddle[depth++] = (char)input;
}
#ifndef NANO_TINY
if (openfile->mark_set && openfile->kind_of_mark == SOFTMARK) {
openfile->mark_set = FALSE;
refresh_needed = TRUE;
}
#endif
}
/* If we got a shortcut or toggle, or if there aren't any other
* characters waiting after the one we read in, we need to output
* all available characters in the input puddle. Note that this
* puddle will be empty if we're in view mode. */
if (have_shortcut || get_key_buffer_len() == 0) {
#ifndef DISABLE_WRAPPING
/* If we got a shortcut or toggle, and it's not the shortcut
* for verbatim input, turn off prepending of wrapped text. */
if (have_shortcut && s->scfunc != do_verbatim_input)
wrap_reset();
#endif
if (puddle != NULL) {
/* Insert all bytes in the input buffer into the edit buffer
* at once, filtering out any low control codes. */
puddle[depth] = '\0';
do_output(puddle, depth, FALSE);
/* Empty the input buffer. */
free(puddle);
puddle = NULL;
depth = 0;
}
}
if (!have_shortcut)
pletion_line = NULL;
else {
const subnfunc *f = sctofunc(s);
if (ISSET(VIEW_MODE) && f && !f->viewok) {
print_view_warning();
return ERR;
}
/* If the function associated with this shortcut is
* cutting or copying text, remember this. */
if (s->scfunc == do_cut_text_void
#ifndef NANO_TINY
|| s->scfunc == do_copy_text || s->scfunc == do_cut_till_eof
#endif
)
preserve = TRUE;
#ifdef ENABLE_WORDCOMPLETION
if (s->scfunc != complete_a_word)
pletion_line = NULL;
#endif
#ifndef NANO_TINY
if (s->scfunc == do_toggle_void) {
do_toggle(s->toggle);
if (s->toggle != CUT_TO_END)
preserve = TRUE;
} else
#endif
{
#ifndef NANO_TINY
/* If Shifted movement occurs, set the mark. */
if (shift_held && !openfile->mark_set) {
openfile->mark_set = TRUE;
openfile->mark_begin = openfile->current;
openfile->mark_begin_x = openfile->current_x;
openfile->kind_of_mark = SOFTMARK;
}
#endif
/* Execute the function of the shortcut. */
s->scfunc();
#ifndef NANO_TINY
/* If Shiftless movement occurred, discard a soft mark. */
if (openfile->mark_set && !shift_held &&
openfile->kind_of_mark == SOFTMARK) {
openfile->mark_set = FALSE;
openfile->mark_begin = NULL;
refresh_needed = TRUE;
}
#endif
#ifndef DISABLE_COLOR
if (f && !f->viewok)
reset_multis(openfile->current, FALSE);
#endif
if (!refresh_needed && (s->scfunc == do_delete || s->scfunc == do_backspace))
update_line(openfile->current, openfile->current_x);
}
}
/* If we aren't cutting or copying text, and the key wasn't a toggle,
* blow away the text in the cutbuffer upon the next cutting action. */
if (!preserve)
cutbuffer_reset();
return input;
}
void xon_complaint(void)
{
statusbar(_("XON ignored, mumble mumble"));
}
void xoff_complaint(void)
{
statusbar(_("XOFF ignored, mumble mumble"));
}
#ifndef DISABLE_MOUSE
/* Handle a mouse click on the edit window or the shortcut list. */
int do_mouse(void)
{
int mouse_x, mouse_y;
int retval = get_mouseinput(&mouse_x, &mouse_y, TRUE);
if (retval != 0)
/* The click is wrong or already handled. */
return retval;
/* We can click on the edit window to move the cursor. */
if (wmouse_trafo(edit, &mouse_y, &mouse_x, FALSE)) {
bool sameline;
/* Did they click on the line with the cursor? If they
* clicked on the cursor, we set the mark. */
filestruct *current_save = openfile->current;
#ifndef NANO_TINY
size_t current_x_save = openfile->current_x;
#endif
sameline = (mouse_y == openfile->current_y);
#ifdef DEBUG
fprintf(stderr, "mouse_y = %d, current_y = %ld\n", mouse_y, (long)openfile->current_y);
#endif
#ifndef NANO_TINY
if (ISSET(SOFTWRAP)) {
size_t i = 0;
openfile->current = openfile->edittop;
while (openfile->current->next != NULL && i < mouse_y) {
openfile->current_y = i;
i += strlenpt(openfile->current->data) / editwincols + 1;
openfile->current = openfile->current->next;
}
if (i > mouse_y) {
openfile->current = openfile->current->prev;
openfile->current_x = actual_x(openfile->current->data,
mouse_x + (mouse_y - openfile->current_y) * editwincols);
} else
openfile->current_x = actual_x(openfile->current->data, mouse_x);
} else
#endif /* NANO_TINY */
{
/* Move to where the click occurred. */
for (; openfile->current_y < mouse_y && openfile->current !=
openfile->filebot; openfile->current_y++)
openfile->current = openfile->current->next;
for (; openfile->current_y > mouse_y && openfile->current !=
openfile->fileage; openfile->current_y--)
openfile->current = openfile->current->prev;
openfile->current_x = actual_x(openfile->current->data,
get_page_start(xplustabs()) + mouse_x);
}
#ifndef NANO_TINY
/* Clicking where the cursor is toggles the mark, as does
* clicking beyond the line length with the cursor at the end of
* the line. */
if (sameline && openfile->current_x == current_x_save)
do_mark();
else
#endif
/* The cursor moved; clean the cutbuffer on the next cut. */
cutbuffer_reset();
edit_redraw(current_save);
}
/* No more handling is needed. */
return 2;
}
#endif /* !DISABLE_MOUSE */
/* The user typed output_len multibyte characters. Add them to the edit
* buffer, filtering out all ASCII control characters if allow_cntrls is
* TRUE. */
void do_output(char *output, size_t output_len, bool allow_cntrls)
{
size_t current_len, i = 0;
#ifndef NANO_TINY
size_t orig_lenpt = 0;
#endif
char *char_buf = charalloc(mb_cur_max());
int char_buf_len;
current_len = strlen(openfile->current->data);
#ifndef NANO_TINY
if (ISSET(SOFTWRAP))
orig_lenpt = strlenpt(openfile->current->data);
#endif
while (i < output_len) {
/* If control codes are allowed, encode a verbatim null as a newline,
* and let a verbatim ^J create a whole new line. */
if (allow_cntrls) {
if (output[i] == '\0')
output[i] = '\n';
else if (output[i] == '\n') {
do_enter();
i++;
continue;
}
}
/* Get the next multibyte character. */
char_buf_len = parse_mbchar(output + i, char_buf, NULL);
i += char_buf_len;
/* If controls are not allowed, ignore an ASCII control character. */
if (!allow_cntrls && is_ascii_cntrl_char(*(output + i - char_buf_len)))
continue;
/* If we're adding to the magicline, create a new magicline. */
if (!ISSET(NO_NEWLINES) && openfile->filebot == openfile->current) {
new_magicline();
if (margin > 0)
refresh_needed = TRUE;
}
assert(openfile->current_x <= current_len);
/* Make room for the new character and copy it into the line. */
openfile->current->data = charealloc(openfile->current->data,
current_len + char_buf_len + 1);
charmove(openfile->current->data + openfile->current_x + char_buf_len,
openfile->current->data + openfile->current_x,
current_len - openfile->current_x + 1);
strncpy(openfile->current->data + openfile->current_x, char_buf,
char_buf_len);
current_len += char_buf_len;
openfile->totsize++;
set_modified();
#ifndef NANO_TINY
add_undo(ADD);
/* Note that current_x has not yet been incremented. */
if (openfile->mark_set && openfile->current == openfile->mark_begin &&
openfile->current_x < openfile->mark_begin_x)
openfile->mark_begin_x += char_buf_len;
#endif
openfile->current_x += char_buf_len;
#ifndef NANO_TINY
update_undo(ADD);
#endif
#ifndef DISABLE_WRAPPING
/* If text gets wrapped, the edit window needs a refresh. */
if (!ISSET(NO_WRAP) && do_wrap(openfile->current))
refresh_needed = TRUE;
#endif
}
#ifndef NANO_TINY
ensure_line_is_visible();
/* If the number of screen rows that a softwrapped line occupies
* has changed, we need a full refresh. */
if (ISSET(SOFTWRAP) && refresh_needed == FALSE)
if (strlenpt(openfile->current->data) / editwincols != orig_lenpt / editwincols)
refresh_needed = TRUE;
#endif
free(char_buf);
openfile->placewewant = xplustabs();
#ifndef DISABLE_COLOR
reset_multis(openfile->current, FALSE);
#endif
if (!refresh_needed)
update_line(openfile->current, openfile->current_x);
}
int main(int argc, char **argv)
{
int optchr;
ssize_t startline = 0, startcol = 0;
/* Target line and column when specified on the command line. */
#ifndef DISABLE_WRAPJUSTIFY
bool fill_used = FALSE;
/* Was the fill option used on the command line? */
#ifndef DISABLE_WRAPPING
bool forced_wrapping = FALSE;
/* Should long lines be automatically hard wrapped? */
#endif
#endif
#ifndef DISABLE_MULTIBUFFER
bool old_multibuffer;
/* The old value of the multibuffer option, restored after we
* load all files on the command line. */
#endif
#ifdef HAVE_GETOPT_LONG
const struct option long_options[] = {
{"boldtext", 0, NULL, 'D'},
#ifndef DISABLE_MULTIBUFFER
{"multibuffer", 0, NULL, 'F'},
#endif
#ifndef DISABLE_NANORC
{"ignorercfiles", 0, NULL, 'I'},
#endif
{"rebindkeypad", 0, NULL, 'K'},
{"nonewlines", 0, NULL, 'L'},
{"morespace", 0, NULL, 'O'},
#ifndef DISABLE_JUSTIFY
{"quotestr", 1, NULL, 'Q'},
#endif
{"restricted", 0, NULL, 'R'},
{"tabsize", 1, NULL, 'T'},
{"version", 0, NULL, 'V'},
#ifndef DISABLE_COLOR
{"syntax", 1, NULL, 'Y'},
#endif
{"constantshow", 0, NULL, 'c'},
{"rebinddelete", 0, NULL, 'd'},
#ifndef DISABLE_BROWSER
{"showcursor", 0, NULL, 'g'},
#endif
{"help", 0, NULL, 'h'},
#ifdef ENABLE_LINENUMBERS
{"linenumbers", 0, NULL, 'l'},
#endif
#ifndef DISABLE_MOUSE
{"mouse", 0, NULL, 'm'},
#endif
{"noread", 0, NULL, 'n'},
#ifndef DISABLE_OPERATINGDIR
{"operatingdir", 1, NULL, 'o'},
#endif
{"preserve", 0, NULL, 'p'},
{"quiet", 0, NULL, 'q'},
#ifndef DISABLE_WRAPJUSTIFY
{"fill", 1, NULL, 'r'},
#endif
#ifndef DISABLE_SPELLER
{"speller", 1, NULL, 's'},
#endif
{"tempfile", 0, NULL, 't'},
{"view", 0, NULL, 'v'},
#ifndef DISABLE_WRAPPING
{"nowrap", 0, NULL, 'w'},
#endif
{"nohelp", 0, NULL, 'x'},
{"suspend", 0, NULL, 'z'},
#ifndef NANO_TINY
{"smarthome", 0, NULL, 'A'},
{"backup", 0, NULL, 'B'},
{"backupdir", 1, NULL, 'C'},
{"tabstospaces", 0, NULL, 'E'},
{"locking", 0, NULL, 'G'},
{"historylog", 0, NULL, 'H'},
{"noconvert", 0, NULL, 'N'},
{"poslog", 0, NULL, 'P'}, /* deprecated form, remove in 2018 */
{"positionlog", 0, NULL, 'P'},
{"smooth", 0, NULL, 'S'},
{"quickblank", 0, NULL, 'U'},
{"wordbounds", 0, NULL, 'W'},
{"wordchars", 1, NULL, 'X'},
{"autoindent", 0, NULL, 'i'},
{"cut", 0, NULL, 'k'},
{"unix", 0, NULL, 'u'},
{"softwrap", 0, NULL, '$'},
#endif
{NULL, 0, NULL, 0}
};
#endif
/* Back up the terminal settings so that they can be restored. */
tcgetattr(0, &oldterm);
#ifdef ENABLE_UTF8
{
/* If the locale set exists and uses UTF-8, we should use
* UTF-8. */
char *locale = setlocale(LC_ALL, "");
if (locale != NULL && (strcmp(nl_langinfo(CODESET),
"UTF-8") == 0)) {
#ifdef USE_SLANG
SLutf8_enable(1);
#endif
utf8_init();
}
}
#else
setlocale(LC_ALL, "");
#endif
#ifdef ENABLE_NLS
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
#endif
#if defined(DISABLE_NANORC) && defined(DISABLE_ROOTWRAPPING)
/* If we don't have rcfile support, --disable-wrapping-as-root is
* used, and we're root, turn wrapping off. */
if (geteuid() == NANO_ROOT_UID)
SET(NO_WRAP);
#endif
/* If the executable's name starts with 'r', activate restricted mode. */
if (*(tail(argv[0])) == 'r')
SET(RESTRICTED);
while ((optchr =
#ifdef HAVE_GETOPT_LONG
getopt_long(argc, argv,
"ABC:DEFGHIKLNOPQ:RST:UVWX:Y:abcdefghijklmno:pqr:s:tuvwxz$",
long_options, NULL)
#else
getopt(argc, argv,
"ABC:DEFGHIKLNOPQ:RST:UVWX:Y:abcdefghijklmno:pqr:s:tuvwxz$")
#endif
) != -1) {
switch (optchr) {
case 'a':
case 'b':
case 'e':
case 'f':
case 'j':
/* Pico compatibility flags. */
break;
#ifndef NANO_TINY
case 'A':
SET(SMART_HOME);
break;
case 'B':
SET(BACKUP_FILE);
break;
case 'C':
backup_dir = mallocstrcpy(backup_dir, optarg);
break;
#endif
case 'D':
SET(BOLD_TEXT);
break;
#ifndef NANO_TINY
case 'E':
SET(TABS_TO_SPACES);
break;
#endif
#ifndef DISABLE_MULTIBUFFER
case 'F':
SET(MULTIBUFFER);
break;
#endif
#ifndef NANO_TINY
case 'G':
SET(LOCKING);
break;
#endif
#ifndef DISABLE_HISTORIES
case 'H':
SET(HISTORYLOG);
break;
#endif
#ifndef DISABLE_NANORC
case 'I':
no_rcfiles = TRUE;
break;
#endif
case 'K':
SET(REBIND_KEYPAD);
break;
case 'L':
SET(NO_NEWLINES);
break;
#ifndef NANO_TINY
case 'N':
SET(NO_CONVERT);
break;
#endif
case 'O':
SET(MORE_SPACE);
break;
#ifndef DISABLE_HISTORIES
case 'P':
SET(POS_HISTORY);
break;
#endif
#ifndef DISABLE_JUSTIFY
case 'Q':
quotestr = mallocstrcpy(quotestr, optarg);
break;
#endif
case 'R':
SET(RESTRICTED);
break;
#ifndef NANO_TINY
case 'S':
SET(SMOOTH_SCROLL);
break;
#endif
case 'T':
if (!parse_num(optarg, &tabsize) || tabsize <= 0) {
fprintf(stderr, _("Requested tab size \"%s\" is invalid"), optarg);
fprintf(stderr, "\n");
exit(1);
}
break;
#ifndef NANO_TINY
case 'U':
SET(QUICK_BLANK);
break;
#endif
case 'V':
version();
exit(0);
#ifndef NANO_TINY
case 'W':
SET(WORD_BOUNDS);
break;
case 'X':
word_chars = mallocstrcpy(word_chars, optarg);
break;
#endif
#ifndef DISABLE_COLOR
case 'Y':
syntaxstr = mallocstrcpy(syntaxstr, optarg);
break;
#endif
case 'c':
SET(CONST_UPDATE);
break;
case 'd':
SET(REBIND_DELETE);
break;
case 'g':
SET(SHOW_CURSOR);
break;
#ifndef NANO_TINY
case 'i':
SET(AUTOINDENT);
break;
case 'k':
SET(CUT_TO_END);
break;
#endif
#ifndef DISABLE_MOUSE
case 'm':
SET(USE_MOUSE);
break;
#endif
case 'n':
SET(NOREAD_MODE);
break;
#ifndef DISABLE_OPERATINGDIR
case 'o':
operating_dir = mallocstrcpy(operating_dir, optarg);
break;
#endif
case 'p':
SET(PRESERVE);
break;
#ifndef DISABLE_NANORC
case 'q':
SET(QUIET);
break;
#endif
#ifndef DISABLE_WRAPJUSTIFY
case 'r':
if (!parse_num(optarg, &wrap_at)) {
fprintf(stderr, _("Requested fill size \"%s\" is invalid"), optarg);
fprintf(stderr, "\n");
exit(1);
}
fill_used = TRUE;
#ifndef DISABLE_WRAPPING
forced_wrapping = TRUE;
#endif
break;
#endif
#ifndef DISABLE_SPELLER
case 's':
alt_speller = mallocstrcpy(alt_speller, optarg);
break;
#endif
case 't':
SET(TEMP_FILE);
break;
#ifndef NANO_TINY
case 'u':
SET(MAKE_IT_UNIX);
break;
#endif
case 'v':
SET(VIEW_MODE);
break;
#ifndef DISABLE_WRAPPING
case 'w':
SET(NO_WRAP);
/* If both --fill and --nowrap are given on the
* command line, the last given option wins. */
forced_wrapping = FALSE;
break;
#endif
case 'x':
SET(NO_HELP);
break;
case 'z':
SET(SUSPEND);
break;
#ifndef NANO_TINY
case '$':
SET(SOFTWRAP);
break;
#endif
#ifdef ENABLE_LINENUMBERS
case 'l':
SET(LINE_NUMBERS);
break;
#endif
case 'h':
usage();
exit(0);
default:
printf(_("Type '%s -h' for a list of available options.\n"), argv[0]);
exit(1);
}
}
/* If we're using restricted mode, disable suspending, backups,
* rcfiles, and history files, since they all would allow reading
* from or writing to files not specified on the command line. */
if (ISSET(RESTRICTED)) {
UNSET(SUSPEND);
UNSET(BACKUP_FILE);
#ifndef DISABLE_NANORC
no_rcfiles = TRUE;
UNSET(HISTORYLOG);
UNSET(POS_HISTORY);
#endif
}
/* Set up the function and shortcut lists. This needs to be done
* before reading the rcfile, to be able to rebind/unbind keys. */
shortcut_init();
/* We've read through the command line options. Now back up the flags
* and values that are set, and read the rcfile(s). If the values
* haven't changed afterward, restore the backed-up values. */
#ifndef DISABLE_NANORC
if (!no_rcfiles) {
#ifndef DISABLE_OPERATINGDIR
char *operating_dir_cpy = operating_dir;
#endif
#ifndef DISABLE_WRAPJUSTIFY
ssize_t wrap_at_cpy = wrap_at;
#endif
#ifndef NANO_TINY
char *backup_dir_cpy = backup_dir;
char *word_chars_cpy = word_chars;
#endif
#ifndef DISABLE_JUSTIFY
char *quotestr_cpy = quotestr;
#endif
#ifndef DISABLE_SPELLER
char *alt_speller_cpy = alt_speller;
#endif
ssize_t tabsize_cpy = tabsize;
unsigned flags_cpy[sizeof(flags) / sizeof(flags[0])];
size_t i;
memcpy(flags_cpy, flags, sizeof(flags_cpy));
#ifndef DISABLE_OPERATINGDIR
operating_dir = NULL;
#endif
#ifndef NANO_TINY
backup_dir = NULL;
word_chars = NULL;
#endif
#ifndef DISABLE_JUSTIFY
quotestr = NULL;
#endif
#ifndef DISABLE_SPELLER
alt_speller = NULL;
#endif
do_rcfiles();
#ifdef DEBUG
fprintf(stderr, "After rebinding keys...\n");
print_sclist();
#endif
#ifndef DISABLE_OPERATINGDIR
if (operating_dir_cpy != NULL) {
free(operating_dir);
operating_dir = operating_dir_cpy;
}
#endif
#ifndef DISABLE_WRAPJUSTIFY
if (fill_used)
wrap_at = wrap_at_cpy;
#endif
#ifndef NANO_TINY
if (backup_dir_cpy != NULL) {
free(backup_dir);
backup_dir = backup_dir_cpy;
}
if (word_chars_cpy != NULL) {
free(word_chars);
word_chars = word_chars_cpy;
}
#endif
#ifndef DISABLE_JUSTIFY
if (quotestr_cpy != NULL) {
free(quotestr);
quotestr = quotestr_cpy;
}
#endif
#ifndef DISABLE_SPELLER
if (alt_speller_cpy != NULL) {
free(alt_speller);
alt_speller = alt_speller_cpy;
}
#endif
if (tabsize_cpy != -1)
tabsize = tabsize_cpy;
for (i = 0; i < sizeof(flags) / sizeof(flags[0]); i++)
flags[i] |= flags_cpy[i];
}
#ifdef DISABLE_ROOTWRAPPING
/* If we don't have any rcfiles, --disable-wrapping-as-root is used,
* and we're root, turn wrapping off. */
else if (geteuid() == NANO_ROOT_UID)
SET(NO_WRAP);
#endif
#endif /* !DISABLE_NANORC */
#ifndef DISABLE_WRAPPING
/* Override a "set nowrap" in an rcfile (or a --disable-wrapping-as-root)
* if --fill was given on the command line and not undone by --nowrap. */
if (forced_wrapping)
UNSET(NO_WRAP);
#endif
/* If we're using bold text instead of reverse video text, set it up
* now. */
if (ISSET(BOLD_TEXT))
hilite_attribute = A_BOLD;
#ifndef DISABLE_HISTORIES
/* Set up the search/replace history. */
history_init();
/* Verify that the home directory and ~/.nano subdir exist. */
if (ISSET(HISTORYLOG) || ISSET(POS_HISTORY)) {
get_homedir();
if (homedir == NULL || check_dotnano() == 0) {
UNSET(HISTORYLOG);
UNSET(POS_HISTORY);
}
}
if (ISSET(HISTORYLOG))
load_history();
if (ISSET(POS_HISTORY))
load_poshistory();
#endif /* !DISABLE_HISTORIES */
#ifndef NANO_TINY
/* Set up the backup directory (unless we're using restricted mode,
* in which case backups are disabled, since they would allow
* reading from or writing to files not specified on the command
* line). This entails making sure it exists and is a directory, so
* that backup files will be saved there. */
if (!ISSET(RESTRICTED))
init_backup_dir();
#endif
#ifndef DISABLE_OPERATINGDIR
/* Set up the operating directory. This entails chdir()ing there,
* so that file reads and writes will be based there. */
init_operating_dir();
#endif
#ifndef DISABLE_JUSTIFY
/* If punct wasn't specified, set its default value. */
if (punct == NULL)
punct = mallocstrcpy(NULL, "!.?");
/* If brackets wasn't specified, set its default value. */
if (brackets == NULL)
brackets = mallocstrcpy(NULL, "\"')>]}");
/* If quotestr wasn't specified, set its default value. */
if (quotestr == NULL)
quotestr = mallocstrcpy(NULL,
#ifdef HAVE_REGEX_H
"^([ \t]*[#:>|}])+"
#else
"> "
#endif
);
#ifdef HAVE_REGEX_H
quoterc = regcomp(&quotereg, quotestr, NANO_REG_EXTENDED);
if (quoterc == 0) {
/* We no longer need quotestr, just quotereg. */
free(quotestr);
quotestr = NULL;
} else {
size_t size = regerror(quoterc, &quotereg, NULL, 0);
quoteerr = charalloc(size);
regerror(quoterc, &quotereg, quoteerr, size);
}
#else
quotelen = strlen(quotestr);
#endif /* !HAVE_REGEX_H */
#endif /* !DISABLE_JUSTIFY */
#ifndef DISABLE_SPELLER
/* If we don't have an alternative spell checker after reading the
* command line and/or rcfile(s), check $SPELL for one, as Pico
* does (unless we're using restricted mode, in which case spell
* checking is disabled, since it would allow reading from or
* writing to files not specified on the command line). */
if (!ISSET(RESTRICTED) && alt_speller == NULL) {
char *spellenv = getenv("SPELL");
if (spellenv != NULL)
alt_speller = mallocstrcpy(NULL, spellenv);
}
#endif
#ifndef NANO_TINY
/* If matchbrackets wasn't specified, set its default value. */
if (matchbrackets == NULL)
matchbrackets = mallocstrcpy(NULL, "(<[{)>]}");
/* If whitespace wasn't specified, set its default value. If we're
* using UTF-8, it's Unicode 00BB (Right-Pointing Double Angle
* Quotation Mark) and Unicode 00B7 (Middle Dot). Otherwise, it's
* ">" and ".". */
if (whitespace == NULL) {
#ifdef ENABLE_UTF8
if (using_utf8()) {
whitespace = mallocstrcpy(NULL, "\xC2\xBB\xC2\xB7");
whitespace_len[0] = 2;
whitespace_len[1] = 2;
} else
#endif
{
whitespace = mallocstrcpy(NULL, ">.");
whitespace_len[0] = 1;
whitespace_len[1] = 1;
}
}
#endif /* !NANO_TINY */
/* Initialize the search string. */
last_search = mallocstrcpy(NULL, "");
/* If tabsize wasn't specified, set its default value. */
if (tabsize == -1)
tabsize = WIDTH_OF_TAB;
/* Initialize curses mode. If this fails, get out. */
if (initscr() == NULL)
exit(1);
/* Set up the terminal state. */
terminal_init();
#ifdef __linux__
/* Check whether we're running on a Linux console. */
console = (getenv("DISPLAY") == NULL);
#endif
#ifdef DEBUG
fprintf(stderr, "Main: set up windows\n");
#endif
/* Initialize all the windows based on the current screen
* dimensions. */
window_init();
editwincols = COLS;
/* Set up the signal handlers. */
signal_init();
#ifndef DISABLE_MOUSE
/* Initialize mouse support. */
mouse_init();
#endif
#ifndef DISABLE_COLOR
set_colorpairs();
#else
interface_color_pair[TITLE_BAR] = hilite_attribute;
interface_color_pair[LINE_NUMBER] = hilite_attribute;
interface_color_pair[STATUS_BAR] = hilite_attribute;
interface_color_pair[KEY_COMBO] = hilite_attribute;
interface_color_pair[FUNCTION_TAG] = A_NORMAL;
#endif
/* Ask ncurses for the key codes for Control+Left/Right/Up/Down. */
controlleft = get_keycode("kLFT5", CONTROL_LEFT);
controlright = get_keycode("kRIT5", CONTROL_RIGHT);
controlup = get_keycode("kUP5", CONTROL_UP);
controldown = get_keycode("kDN5", CONTROL_DOWN);
#ifndef NANO_TINY
/* Ask for the codes for Shift+Control+Left/Right/Up/Down. */
shiftcontrolleft = get_keycode("kLFT6", SHIFT_CONTROL_LEFT);
shiftcontrolright = get_keycode("kRIT6", SHIFT_CONTROL_RIGHT);
shiftcontrolup = get_keycode("kUP6", SHIFT_CONTROL_UP);
shiftcontroldown = get_keycode("kDN6", SHIFT_CONTROL_DOWN);
/* Ask for the codes for Shift+Alt+Left/Right/Up/Down. */
shiftaltleft = get_keycode("kLFT4", SHIFT_ALT_LEFT);
shiftaltright = get_keycode("kRIT4", SHIFT_ALT_RIGHT);
shiftaltup = get_keycode("kUP4", SHIFT_ALT_UP);
shiftaltdown = get_keycode("kDN4", SHIFT_ALT_DOWN);
#endif
#ifndef USE_SLANG
/* Tell ncurses to pass the Esc key quickly. */
set_escdelay(50);
#endif
#ifdef DEBUG
fprintf(stderr, "Main: open file\n");
#endif
/* If there's a +LINE or +LINE,COLUMN flag here, it is the first
* non-option argument, and it is followed by at least one other
* argument, the filename it applies to. */
if (0 < optind && optind < argc - 1 && argv[optind][0] == '+') {
parse_line_column(&argv[optind][1], &startline, &startcol);
optind++;
}
/* If one of the arguments is a dash, read text from standard input. */
if (optind < argc && !strcmp(argv[optind], "-")) {
stdin_pager();
set_modified();
optind++;
}
#ifndef DISABLE_MULTIBUFFER
old_multibuffer = ISSET(MULTIBUFFER);
SET(MULTIBUFFER);
/* Read all the files after the first one on the command line into
* new buffers. */
{
int i = optind + 1;
ssize_t iline = 0, icol = 0;
for (; i < argc; i++) {
/* If there's a +LINE or +LINE,COLUMN flag here, it is followed
* by at least one other argument: the filename it applies to. */
if (i < argc - 1 && argv[i][0] == '+')
parse_line_column(&argv[i][1], &iline, &icol);
else {
/* If opening fails, don't try to position the cursor. */
if (!open_buffer(argv[i], FALSE))
continue;
/* If a position was given on the command line, go there. */
if (iline > 0 || icol > 0) {
do_gotolinecolumn(iline, icol, FALSE, FALSE);
iline = 0;
icol = 0;
}
#ifndef DISABLE_HISTORIES
else if (ISSET(POS_HISTORY)) {
ssize_t savedposline, savedposcol;
/* If edited before, restore the last cursor position. */
if (check_poshistory(argv[i], &savedposline, &savedposcol))
do_gotolinecolumn(savedposline, savedposcol,
FALSE, FALSE);
}
#endif
}
}
}
#endif /* !DISABLE_MULTIBUFFER */
/* Now read the first file on the command line into a new buffer. */
if (optind < argc)
open_buffer(argv[optind], FALSE);
/* If all the command-line arguments were invalid files like directories,
* or if there were no filenames given, we didn't open any file. In this
* case, load a blank buffer. Also, unset view mode to allow editing. */
if (openfile == NULL) {
open_buffer("", FALSE);
UNSET(VIEW_MODE);
}
#ifndef DISABLE_MULTIBUFFER
if (!old_multibuffer)
UNSET(MULTIBUFFER);
#endif
/* If a starting position was given on the command line, go there. */
if (startline > 0 || startcol > 0)
do_gotolinecolumn(startline, startcol, FALSE, FALSE);
#ifndef DISABLE_HISTORIES
else if (ISSET(POS_HISTORY)) {
ssize_t savedposline, savedposcol;
/* If the file was edited before, restore the last cursor position. */
if (check_poshistory(argv[optind], &savedposline, &savedposcol))
do_gotolinecolumn(savedposline, savedposcol, FALSE, FALSE);
}
#endif
#ifdef DEBUG
fprintf(stderr, "Main: show buffer contents, and enter main loop\n");
#endif
display_buffer();
while (TRUE) {
#ifdef ENABLE_LINENUMBERS
int needed_margin = digits(openfile->filebot->lineno) + 1;
/* Only enable line numbers when there is enough room for them. */
if (ISSET(LINE_NUMBERS) && needed_margin < COLS - 3) {
if (needed_margin != margin) {
margin = needed_margin;
editwincols = COLS - margin;
/* The margin has changed -- schedule a full refresh. */
refresh_needed = TRUE;
}
} else
#endif
{
margin = 0;
editwincols = COLS;
}
if (currmenu != MMAIN)
display_main_list();
lastmessage = HUSH;
/* Update the displayed current cursor position only when there
* are no keys waiting in the input buffer. */
if (ISSET(CONST_UPDATE) && get_key_buffer_len() == 0)
do_cursorpos(TRUE);
/* Refresh just the cursor position or the entire edit window. */
if (!refresh_needed) {
reset_cursor();
wnoutrefresh(edit);
} else
edit_refresh();
/* Make sure the cursor is visible. */
curs_set(1);
focusing = TRUE;
/* Forget any earlier statusbar x position. */
reinit_statusbar_x();
/* Read in and interpret keystrokes. */
do_input(TRUE);
}
/* We should never get here. */
assert(FALSE);
}
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