/* $Id$ */
/**************************************************************************
* nano.c *
* *
* Copyright (C) 1999-2004 Chris Allegretta *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
**************************************************************************/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <errno.h>
#include <ctype.h>
#include <locale.h>
#include <assert.h>
#include "proto.h"
#include "nano.h"
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifdef HAVE_TERMIO_H
#include <termio.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#ifndef NANO_SMALL
#include <setjmp.h>
#endif
#ifndef DISABLE_WRAPJUSTIFY
static ssize_t fill = 0; /* Fill - where to wrap lines,
basically */
#endif
#ifndef DISABLE_WRAPPING
static bool same_line_wrap = FALSE; /* Whether wrapped text should
be prepended to the next
line */
#endif
static struct termios oldterm; /* The user's original term settings */
static struct sigaction act; /* For all our fun signal handlers */
#ifndef NANO_SMALL
static sigjmp_buf jmpbuf; /* Used to return to mainloop after
SIGWINCH */
static int pid; /* The PID of the newly forked process
* in open_pipe(). It must be global
* because the signal handler needs
* it. */
#endif
#ifndef DISABLE_JUSTIFY
static filestruct *jusbottom = NULL;
/* Pointer to end of justify buffer. */
#endif
/* What we do when we're all set to exit. */
void finish(void)
{
if (!ISSET(NO_HELP))
blank_bottombars();
else
blank_statusbar();
wrefresh(bottomwin);
endwin();
/* Restore the old terminal settings. */
tcsetattr(0, TCSANOW, &oldterm);
#if !defined(NANO_SMALL) && defined(ENABLE_NANORC)
if (!ISSET(NO_RCFILE) && ISSET(HISTORYLOG))
save_history();
#endif
#ifdef DEBUG
thanks_for_all_the_fish();
#endif
exit(0);
}
/* Die (gracefully?). */
void die(const char *msg, ...)
{
va_list ap;
endwin();
curses_ended = TRUE;
/* Restore the old terminal settings. */
tcsetattr(0, TCSANOW, &oldterm);
va_start(ap, msg);
vfprintf(stderr, msg, ap);
va_end(ap);
/* Save the current file buffer if it's been modified. */
if (ISSET(MODIFIED))
die_save_file(filename);
#ifdef ENABLE_MULTIBUFFER
/* Save all of the other modified file buffers, if any. */
if (open_files != NULL) {
openfilestruct *tmp = open_files;
while (tmp != open_files->next) {
open_files = open_files->next;
/* Save the current file buffer if it's been modified. */
if (open_files->flags & MODIFIED) {
/* Set fileage and filebot to match the current file
* buffer, and then write it to disk. */
fileage = open_files->fileage;
filebot = open_files->filebot;
die_save_file(open_files->filename);
}
}
}
#endif
/* Get out. */
exit(1);
}
void die_save_file(const char *die_filename)
{
char *ret;
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 REAL bad problems, but we might as well
TRY. */
if (die_filename[0] == '\0')
die_filename = "nano";
ret = get_next_filename(die_filename);
if (ret[0] != '\0')
failed = (write_file(ret, TRUE, FALSE, TRUE) == -1);
if (!failed)
fprintf(stderr, _("\nBuffer written to %s\n"), ret);
else
fprintf(stderr, _("\nBuffer not written to %s (too many backup files?)\n"), ret);
free(ret);
}
/* Die with an error message that the screen was too small if, well, the
* screen is too small. */
void die_too_small(void)
{
die(_("Window size is too small for nano...\n"));
}
void print_view_warning(void)
{
statusbar(_("Key illegal in VIEW mode"));
}
/* Initialize global variables -- no better way for now. If
* save_cutbuffer is TRUE, don't set cutbuffer to NULL. */
void global_init(bool save_cutbuffer)
{
current_x = 0;
current_y = 0;
editwinrows = LINES - 5 + no_help();
if (editwinrows < MIN_EDITOR_ROWS || COLS < MIN_EDITOR_COLS)
die_too_small();
fileage = NULL;
if (!save_cutbuffer)
cutbuffer = NULL;
current = NULL;
edittop = NULL;
totlines = 0;
totsize = 0;
placewewant = 0;
#ifndef DISABLE_WRAPJUSTIFY
fill = wrap_at;
if (fill <= 0)
fill += COLS;
if (fill < 0)
fill = 0;
#endif
hblank = charalloc(COLS + 1);
memset(hblank, ' ', COLS);
hblank[COLS] = '\0';
}
void window_init(void)
{
editwinrows = LINES - 5 + no_help();
if (editwinrows < MIN_EDITOR_ROWS)
die_too_small();
if (topwin != NULL)
delwin(topwin);
if (edit != NULL)
delwin(edit);
if (bottomwin != NULL)
delwin(bottomwin);
/* Set up the windows. */
topwin = newwin(2, COLS, 0, 0);
edit = newwin(editwinrows, COLS, 2, 0);
bottomwin = newwin(3 - no_help(), COLS, LINES - 3 + no_help(), 0);
/* Turn the keypad back on. */
keypad(edit, TRUE);
keypad(bottomwin, TRUE);
}
#ifndef DISABLE_MOUSE
void mouse_init(void)
{
if (ISSET(USE_MOUSE)) {
mousemask(BUTTON1_RELEASED, NULL);
mouseinterval(50);
} else
mousemask(0, NULL);
}
#endif
#ifndef DISABLE_HELP
/* This function allocates help_text, and stores the help string in it.
* help_text should be NULL initially. */
void help_init(void)
{
size_t allocsize = 1; /* Space needed for help_text. */
const char *htx; /* Untranslated help message. */
char *ptr;
const shortcut *s;
#ifndef NANO_SMALL
const toggle *t;
#endif
/* First, set up the initial help text for the current function. */
if (currshortcut == whereis_list || currshortcut == replace_list
|| currshortcut == replace_list_2)
htx = N_("Search Command Help Text\n\n "
"Enter the words or characters you would like to search "
"for, then hit Enter. If there is a match for the text you "
"entered, the screen will be updated to the location of the "
"nearest match for the search string.\n\n The previous "
"search string will be shown in brackets after the search "
"prompt. Hitting Enter without entering any text will "
"perform the previous search. If you have selected text "
"with the mark and then search to replace, only matches in "
"the selected text will be replaced.\n\n The following "
"function keys are available in Search mode:\n\n");
else if (currshortcut == gotoline_list)
htx = N_("Go To Line Help Text\n\n "
"Enter the line number that you wish to go to and hit "
"Enter. If there are fewer lines of text than the "
"number you entered, you will be brought to the last line "
"of the file.\n\n The following function keys are "
"available in Go To Line mode:\n\n");
else if (currshortcut == insertfile_list)
htx = N_("Insert File Help Text\n\n "
"Type in the name of a file to be inserted into the current "
"file buffer at the current cursor location.\n\n "
"If you have compiled nano with multiple file buffer "
"support, and enable multiple buffers with the -F "
"or --multibuffer command line flags, the Meta-F toggle, or "
"a nanorc file, inserting a file will cause it to be "
"loaded into a separate buffer (use Meta-< and > to switch "
"between file buffers). If you need another blank buffer, "
"do not enter any filename, or type in a nonexistent "
"filename at the prompt and press Enter.\n\n The following "
"function keys are available in Insert File mode:\n\n");
else if (currshortcut == writefile_list)
htx = N_("Write File Help Text\n\n "
"Type the name that you wish to save the current file "
"as and hit Enter to save the file.\n\n If you have "
"selected text with the mark, you will be prompted to "
"save only the selected portion to a separate file. To "
"reduce the chance of overwriting the current file with "
"just a portion of it, the current filename is not the "
"default in this mode.\n\n The following function keys "
"are available in Write File mode:\n\n");
#ifndef DISABLE_BROWSER
else if (currshortcut == browser_list)
htx = N_("File Browser Help Text\n\n "
"The file browser is used to visually browse the "
"directory structure to select a file for reading "
"or writing. You may use the arrow keys or Page Up/"
"Down to browse through the files, and S or Enter to "
"choose the selected file or enter the selected "
"directory. To move up one level, select the directory "
"called \"..\" at the top of the file list.\n\n The "
"following function keys are available in the file "
"browser:\n\n");
else if (currshortcut == gotodir_list)
htx = N_("Browser Go To Directory Help Text\n\n "
"Enter the name of the directory you would like to "
"browse to.\n\n If tab completion has not been disabled, "
"you can use the Tab key to (attempt to) automatically "
"complete the directory name.\n\n The following function "
"keys are available in Browser Go To Directory mode:\n\n");
#endif
#ifndef DISABLE_SPELLER
else if (currshortcut == spell_list)
htx = N_("Spell Check Help Text\n\n "
"The spell checker checks the spelling of all text "
"in the current file. When an unknown word is "
"encountered, it is highlighted and a replacement can "
"be edited. It will then prompt to replace every "
"instance of the given misspelled word in the "
"current file, or, if you have selected text with the "
"mark, in the selected text.\n\n The following other "
"functions are available in Spell Check mode:\n\n");
#endif
#ifndef NANO_SMALL
else if (currshortcut == extcmd_list)
htx = N_("External Command Help Text\n\n "
"This menu allows you to insert the output of a command "
"run by the shell into the current buffer (or a new "
"buffer in multibuffer mode). If you need another blank "
"buffer, do not enter any command.\n\n The following keys "
"are available in this mode:\n\n");
#endif
else
/* Default to the main help list. */
htx = N_(" 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 and can be "
"entered either by using the Control (Ctrl) key or pressing the "
"Esc key twice. Escape-key sequences are notated with the Meta "
"(M) symbol and can be entered using either the Esc, Alt or "
"Meta key depending on your keyboard setup. Also, pressing Esc "
"twice and then typing a three-digit number from 000 to 255 "
"will enter the character with the corresponding ASCII code. "
"The following keystrokes are available in the main editor "
"window. Alternative keys are shown in parentheses:\n\n");
htx = _(htx);
allocsize += strlen(htx);
/* The space needed for the shortcut lists, at most COLS characters,
* plus '\n'. */
allocsize += (COLS < 21 ? 21 : COLS + 1) *
length_of_list(currshortcut);
#ifndef NANO_SMALL
/* If we're on the main list, we also count the toggle help text.
* Each line has "M-%c\t\t\t", which fills 24 columns, plus a space,
* plus translated text, plus '\n'. */
if (currshortcut == main_list) {
size_t endislen = strlen(_("enable/disable"));
for (t = toggles; t != NULL; t = t->next)
allocsize += 8 + strlen(t->desc) + endislen;
}
#endif
/* help_text has been freed and set to NULL unless the user resized
* while in the help screen. */
free(help_text);
/* Allocate space for the help text. */
help_text = charalloc(allocsize);
/* Now add the text we want. */
strcpy(help_text, htx);
ptr = help_text + strlen(help_text);
/* Now add our shortcut info. Assume that each shortcut has, at the
* very least, an equivalent control key, an equivalent primary meta
* key sequence, or both. Also assume that the meta key values are
* not control characters. We can display a maximum of 3 shortcut
* entries. */
for (s = currshortcut; s != NULL; s = s->next) {
int entries = 0;
/* Control key. */
if (s->ctrlval != NANO_NO_KEY) {
entries++;
#ifndef NANO_SMALL
if (s->ctrlval == NANO_HISTORY_KEY)
ptr += sprintf(ptr, "%.7s", _("Up"));
else
#endif
if (s->ctrlval == NANO_CONTROL_SPACE)
ptr += sprintf(ptr, "^%.6s", _("Space"));
else if (s->ctrlval == NANO_CONTROL_8)
ptr += sprintf(ptr, "^?");
else
ptr += sprintf(ptr, "^%c", s->ctrlval + 64);
*(ptr++) = '\t';
}
/* Function key. */
if (s->funcval != NANO_NO_KEY) {
entries++;
/* If this is the first entry, put it in the middle. */
if (entries == 1) {
entries++;
*(ptr++) = '\t';
}
ptr += sprintf(ptr, "(F%d)", s->funcval - KEY_F0);
*(ptr++) = '\t';
}
/* Primary meta key sequence. */
if (s->metaval != NANO_NO_KEY) {
entries++;
/* If this is the last entry, put it at the end. */
if (entries == 2 && s->miscval == NANO_NO_KEY) {
entries++;
*(ptr++) = '\t';
}
/* If the primary meta key sequence is the first entry,
* don't put parentheses around it. */
if (entries == 1 && s->metaval == NANO_ALT_SPACE)
ptr += sprintf(ptr, "M-%.5s", _("Space"));
else
ptr += sprintf(ptr, entries == 1 ? "M-%c" : "(M-%c)",
toupper(s->metaval));
*(ptr++) = '\t';
}
/* Miscellaneous meta key sequence. */
if (entries < 3 && s->miscval != NANO_NO_KEY) {
entries++;
/* If this is the last entry, put it at the end. */
if (entries == 2) {
entries++;
*(ptr++) = '\t';
}
ptr += sprintf(ptr, "(M-%c)", toupper(s->miscval));
*(ptr++) = '\t';
}
/* Make sure all the help text starts at the same place. */
while (entries < 3) {
entries++;
*(ptr++) = '\t';
}
assert(s->help != NULL);
ptr += sprintf(ptr, "%.*s\n", COLS > 24 ? COLS - 24 : 0, s->help);
}
#ifndef NANO_SMALL
/* And the toggles... */
if (currshortcut == main_list) {
for (t = toggles; t != NULL; t = t->next) {
assert(t->desc != NULL);
ptr += sprintf(ptr, "M-%c\t\t\t%s %s\n", toupper(t->val),
t->desc, _("enable/disable"));
}
}
#endif /* !NANO_SMALL */
/* If all went well, we didn't overwrite the allocated space for
* help_text. */
assert(strlen(help_text) < allocsize);
}
#endif
/* Create a new filestruct node. Note that we specifically do not set
* prevnode->next equal 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;
return newnode;
}
/* Make a copy of a filestruct node. */
filestruct *copy_node(const filestruct *src)
{
filestruct *dst = (filestruct *)nmalloc(sizeof(filestruct));
assert(src != NULL);
dst->data = mallocstrcpy(NULL, src->data);
dst->next = src->next;
dst->prev = src->prev;
dst->lineno = src->lineno;
return dst;
}
/* Splice a node into an existing filestruct. */
void splice_node(filestruct *begin, filestruct *newnode, filestruct
*end)
{
assert(newnode != NULL && begin != NULL);
newnode->next = end;
newnode->prev = begin;
begin->next = newnode;
if (end != NULL)
end->prev = newnode;
}
/* Unlink a node from the rest of the filestruct. */
void unlink_node(const filestruct *fileptr)
{
assert(fileptr != NULL);
if (fileptr->prev != NULL)
fileptr->prev->next = fileptr->next;
if (fileptr->next != NULL)
fileptr->next->prev = fileptr->prev;
}
/* Delete a node from the filestruct. */
void delete_node(filestruct *fileptr)
{
assert(fileptr != NULL && fileptr->data != NULL);
if (fileptr->data != NULL)
free(fileptr->data);
free(fileptr);
}
/* Okay, now let's duplicate a whole struct! */
filestruct *copy_filestruct(const filestruct *src)
{
filestruct *head; /* copy of src, top of the copied list */
filestruct *prev; /* temp that traverses the list */
assert(src != NULL);
prev = copy_node(src);
prev->prev = NULL;
head = prev;
src = src->next;
while (src != NULL) {
prev->next = copy_node(src);
prev->next->prev = prev;
prev = prev->next;
src = src->next;
}
prev->next = NULL;
return head;
}
/* Frees a filestruct. */
void free_filestruct(filestruct *src)
{
assert(src != NULL);
while (src->next != NULL) {
src = src->next;
delete_node(src->prev);
}
delete_node(src);
}
/* Partition a filestruct so 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 && fileage != NULL && 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 != fileage) {
p->fileage = fileage;
fileage = top;
} else
p->fileage = NULL;
if (bot != filebot) {
p->filebot = filebot;
filebot = bot;
} else
p->filebot = NULL;
/* Save the line above the top of the partition, detach the top of
* the partition from it, and save the text before top_x in
* top_data. */
p->top_prev = top->prev;
top->prev = NULL;
p->top_data = mallocstrncpy(NULL, top->data, top_x + 1);
p->top_data[top_x] = '\0';
/* Save the line below the bottom of the partition, detach the
* bottom of the partition from it, and save the text after bot_x in
* bot_data. */
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);
align(&top->data);
/* Return the partition. */
return p;
}
/* Unpartition a filestruct so it begins at (fileage, 0) and ends at
* (filebot, strlen(filebot)) again. */
void unpartition_filestruct(partition **p)
{
char *tmp;
assert(p != NULL && fileage != NULL && 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. */
tmp = mallocstrcpy(NULL, fileage->data);
fileage->prev = (*p)->top_prev;
if (fileage->prev != NULL)
fileage->prev->next = fileage;
fileage->data = charealloc(fileage->data, strlen((*p)->top_data) +
strlen(fileage->data) + 1);
strcpy(fileage->data, (*p)->top_data);
free((*p)->top_data);
strcat(fileage->data, tmp);
free(tmp);
/* 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. */
filebot->next = (*p)->bot_next;
if (filebot->next != NULL)
filebot->next->prev = filebot;
filebot->data = charealloc(filebot->data, strlen(filebot->data) +
strlen((*p)->bot_data) + 1);
strcat(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)
fileage = (*p)->fileage;
if ((*p)->filebot != NULL)
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;
long part_totsize;
bool at_edittop;
#ifndef NANO_SMALL
bool mark_inside = 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 partition is the top of the edit window, and keep track of
* whether the mark begins inside the partition. */
filepart = partition_filestruct(top, top_x, bot, bot_x);
at_edittop = (fileage == edittop);
#ifndef NANO_SMALL
if (ISSET(MARK_ISSET))
mark_inside = (mark_beginbuf->lineno >= fileage->lineno &&
mark_beginbuf->lineno <= filebot->lineno &&
(mark_beginbuf != fileage || mark_beginx >= top_x) &&
(mark_beginbuf != filebot || mark_beginx <= bot_x));
#endif
/* Get the number of characters in the text, and subtract it from
* totsize. */
get_totals(top, bot, NULL, &part_totsize);
totsize -= part_totsize;
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 = fileage;
*file_bot = filebot;
} else {
/* 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(fileage->data) + 1);
strcat((*file_bot)->data, 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 = fileage->next;
if ((*file_bot)->next != NULL) {
(*file_bot)->next->prev = *file_bot;
*file_bot = filebot;
}
}
/* Since the text has now been saved, remove it from the filestruct.
* If the top of the partition was the top of the edit window, set
* edittop to where the text used to start. If the mark began
* inside the partition, set the beginning of the mark to where the
* text used to start. */
fileage = (filestruct *)nmalloc(sizeof(filestruct));
fileage->data = mallocstrcpy(NULL, "");
filebot = fileage;
if (at_edittop)
edittop = fileage;
#ifndef NANO_SMALL
if (mark_inside) {
mark_beginbuf = fileage;
mark_beginx = top_x;
}
#endif
/* Restore the current line and cursor position. */
current = fileage;
current_x = top_x;
top_save = fileage;
/* Unpartition the filestruct so that it contains all the text
* again, minus the saved text. */
unpartition_filestruct(&filepart);
/* Renumber starting with the beginning line of the old
* partition. */
renumber(top_save);
if (filebot->data[0] != '\0')
new_magicline();
/* Set totlines to the new number of lines in the file. */
totlines = filebot->lineno;
}
/* Copy all the text from the filestruct beginning with file_top and
* ending with file_bot to the current filestruct at the current cursor
* position. */
void copy_from_filestruct(filestruct *file_top, filestruct *file_bot)
{
filestruct *top_save;
int part_totlines;
long part_totsize;
bool at_edittop;
assert(file_top != NULL && file_bot != NULL);
/* Partition the filestruct so that it contains no text, and keep
* track of whether the top of the partition is the top of the edit
* window. */
filepart = partition_filestruct(current, current_x, current,
current_x);
at_edittop = (fileage == edittop);
/* Put the top and bottom of the filestruct at copies of file_top
* and file_bot. */
fileage = copy_filestruct(file_top);
filebot = fileage;
while (filebot->next != NULL)
filebot = filebot->next;
/* Restore the current line and cursor position. */
current = filebot;
current_x = strlen(filebot->data);
if (fileage == filebot)
current_x += strlen(filepart->top_data);
/* Get the number of lines and the number of characters in the saved
* text, and add the latter to totsize. */
get_totals(fileage, filebot, &part_totlines, &part_totsize);
totsize += part_totsize;
/* If the top of the partition was the top of the edit window, set
* edittop to where the saved text now starts, and update the
* current y-coordinate to account for the number of lines it
* has, less one since the first line will be tacked onto the
* current line. */
if (at_edittop)
edittop = fileage;
current_y += part_totlines - 1;
top_save = fileage;
/* Unpartition the filestruct so that it contains all the text
* again, minus the saved text. */
unpartition_filestruct(&filepart);
/* Renumber starting with the beginning line of the old
* partition. */
renumber(top_save);
if (filebot->data[0] != '\0')
new_magicline();
/* Set totlines to the new number of lines in the file. */
totlines = filebot->lineno;
}
void renumber_all(void)
{
filestruct *temp;
int i = 1;
assert(fileage == NULL || fileage != fileage->next);
for (temp = fileage; temp != NULL; temp = temp->next)
temp->lineno = i++;
}
void renumber(filestruct *fileptr)
{
if (fileptr == NULL || fileptr->prev == NULL || fileptr == fileage)
renumber_all();
else {
int lineno = fileptr->prev->lineno;
assert(fileptr != fileptr->next);
for (; fileptr != NULL; fileptr = fileptr->next)
fileptr->lineno = ++lineno;
}
}
/* 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 (the flag names). */
void print1opt(const char *shortflag, const char *longflag, const char
*desc)
{
printf(" %s\t", shortflag);
if (strlen(shortflag) < 8)
printf("\t");
#ifdef HAVE_GETOPT_LONG
printf("%s\t", longflag);
if (strlen(longflag) < 8)
printf("\t\t");
else if (strlen(longflag) < 16)
printf("\t");
#endif
printf("%s\n", _(desc));
}
void usage(void)
{
#ifdef HAVE_GETOPT_LONG
printf(_("Usage: nano [+LINE] [GNU long option] [option] [file]\n\n"));
printf(_("Option\t\tLong option\t\tMeaning\n"));
#else
printf(_("Usage: nano [+LINE] [option] [file]\n\n"));
printf(_("Option\t\tMeaning\n"));
#endif
print1opt("-h, -?", "--help", N_("Show this message"));
print1opt(_("+LINE"), "", N_("Start at line number LINE"));
#ifndef NANO_SMALL
print1opt("-A", "--smarthome", N_("Enable smart home key"));
print1opt("-B", "--backup", N_("Backup existing files on save"));
print1opt(_("-E [dir]"), _("--backupdir=[dir]"), N_("Directory for writing backup files"));
#endif
#ifdef ENABLE_MULTIBUFFER
print1opt("-F", "--multibuffer", N_("Enable multiple file buffers"));
#endif
#ifdef ENABLE_NANORC
#ifndef NANO_SMALL
print1opt("-H", "--historylog", N_("Log & read search/replace string history"));
#endif
print1opt("-I", "--ignorercfiles", N_("Don't look at nanorc files"));
#endif
#ifndef NANO_SMALL
print1opt("-N", "--noconvert", N_("Don't convert files from DOS/Mac format"));
#endif
#ifdef NANO_WIDE
print1opt("-O", "--noutf8", N_("Don't convert files from UTF-8 format"));
#endif
#ifndef DISABLE_JUSTIFY
print1opt(_("-Q [str]"), _("--quotestr=[str]"), N_("Quoting string, default \"> \""));
#endif
#ifdef HAVE_REGEX_H
print1opt("-R", "--regexp", N_("Do regular expression searches"));
#endif
#ifndef NANO_SMALL
print1opt("-S", "--smooth", N_("Smooth scrolling"));
#endif
print1opt(_("-T [#cols]"), _("--tabsize=[#cols]"), N_("Set width of a tab in cols to #cols"));
print1opt("-V", "--version", N_("Print version information and exit"));
#ifdef ENABLE_COLOR
print1opt(_("-Y [str]"), _("--syntax [str]"), N_("Syntax definition to use"));
#endif
print1opt("-Z", "--restricted", N_("Restricted mode"));
print1opt("-c", "--const", N_("Constantly show cursor position"));
#ifndef NANO_SMALL
print1opt("-d", "--rebinddelete", N_("Fix Backspace/Delete confusion problem"));
print1opt("-i", "--autoindent", N_("Automatically indent new lines"));
print1opt("-k", "--cut", N_("Cut from cursor to end of line"));
#endif
print1opt("-l", "--nofollow", N_("Don't follow symbolic links, overwrite"));
#ifndef DISABLE_MOUSE
print1opt("-m", "--mouse", N_("Enable mouse"));
#endif
#ifndef DISABLE_OPERATINGDIR
print1opt(_("-o [dir]"), _("--operatingdir=[dir]"), N_("Set operating directory"));
#endif
print1opt("-p", "--preserve", N_("Preserve XON (^Q) and XOFF (^S) keys"));
#ifndef DISABLE_WRAPJUSTIFY
print1opt(_("-r [#cols]"), _("--fill=[#cols]"), N_("Set fill cols to (wrap lines at) #cols"));
#endif
#ifndef DISABLE_SPELLER
print1opt(_("-s [prog]"), _("--speller=[prog]"), N_("Enable alternate speller"));
#endif
print1opt("-t", "--tempfile", N_("Auto save on exit, don't prompt"));
print1opt("-v", "--view", N_("View (read only) mode"));
#ifndef DISABLE_WRAPPING
print1opt("-w", "--nowrap", N_("Don't wrap long lines"));
#endif
print1opt("-x", "--nohelp", N_("Don't show help window"));
print1opt("-z", "--suspend", N_("Enable suspend"));
/* This is a special case. */
printf(" %s\t\t\t%s\n","-a, -b, -e, -f, -g, -j", _("(ignored, for Pico compatibility)"));
exit(0);
}
void version(void)
{
printf(_(" GNU nano version %s (compiled %s, %s)\n"),
VERSION, __TIME__, __DATE__);
printf(_
(" Email: nano@nano-editor.org Web: http://www.nano-editor.org/"));
printf(_("\n Compiled options:"));
#ifndef ENABLE_NLS
printf(" --disable-nls");
#endif
#ifdef DEBUG
printf(" --enable-debug");
#endif
#ifdef NANO_EXTRA
printf(" --enable-extra");
#endif
#ifdef NANO_SMALL
printf(" --enable-tiny");
#else
#ifdef DISABLE_BROWSER
printf(" --disable-browser");
#endif
#ifdef DISABLE_HELP
printf(" --disable-help");
#endif
#ifdef DISABLE_JUSTIFY
printf(" --disable-justify");
#endif
#ifdef DISABLE_MOUSE
printf(" --disable-mouse");
#endif
#ifdef DISABLE_OPERATINGDIR
printf(" --disable-operatingdir");
#endif
#ifdef DISABLE_SPELLER
printf(" --disable-speller");
#endif
#ifdef DISABLE_TABCOMP
printf(" --disable-tabcomp");
#endif
#endif /* NANO_SMALL */
#ifdef DISABLE_WRAPPING
printf(" --disable-wrapping");
#endif
#ifdef DISABLE_ROOTWRAP
printf(" --disable-wrapping-as-root");
#endif
#ifdef ENABLE_COLOR
printf(" --enable-color");
#endif
#ifdef ENABLE_MULTIBUFFER
printf(" --enable-multibuffer");
#endif
#ifdef ENABLE_NANORC
printf(" --enable-nanorc");
#endif
#ifdef USE_SLANG
printf(" --with-slang");
#endif
printf("\n");
}
int no_help(void)
{
return ISSET(NO_HELP) ? 2 : 0;
}
void nano_disabled_msg(void)
{
statusbar(_("Sorry, support for this function has been disabled"));
}
#ifndef NANO_SMALL
RETSIGTYPE cancel_fork(int signal)
{
if (kill(pid, SIGKILL) == -1)
nperror("kill");
}
/* Return TRUE on success. */
bool open_pipe(const char *command)
{
int fd[2];
FILE *f;
struct sigaction oldaction, newaction;
/* Original and temporary handlers for
* SIGINT. */
bool sig_failed = FALSE;
/* sig_failed means that sigaction() failed without changing the
* signal handlers.
*
* We use this variable since it is important to put things back
* when we finish, even if we get errors. */
/* Make our pipes. */
if (pipe(fd) == -1) {
statusbar(_("Could not pipe"));
return FALSE;
}
/* Fork a child. */
if ((pid = fork()) == 0) {
close(fd[0]);
dup2(fd[1], fileno(stdout));
dup2(fd[1], fileno(stderr));
/* If execl() returns at all, there was an error. */
execl("/bin/sh", "sh", "-c", command, 0);
exit(0);
}
/* Else continue as parent. */
close(fd[1]);
if (pid == -1) {
close(fd[0]);
statusbar(_("Could not fork"));
return FALSE;
}
/* Before we start reading the forked command's output, we set
* things up so that ^C will cancel the new process. */
/* Enable interpretation of the special control keys so that we get
* SIGINT when Ctrl-C is pressed. */
enable_signals();
if (sigaction(SIGINT, NULL, &newaction) == -1) {
sig_failed = TRUE;
nperror("sigaction");
} else {
newaction.sa_handler = cancel_fork;
if (sigaction(SIGINT, &newaction, &oldaction) == -1) {
sig_failed = TRUE;
nperror("sigaction");
}
}
/* Note that now oldaction is the previous SIGINT signal handler,
* to be restored later. */
f = fdopen(fd[0], "rb");
if (f == NULL)
nperror("fdopen");
read_file(f, "stdin");
/* If multibuffer mode is on, we could be here in view mode. If so,
* don't set the modification flag. */
if (!ISSET(VIEW_MODE))
set_modified();
if (wait(NULL) == -1)
nperror("wait");
if (!sig_failed && sigaction(SIGINT, &oldaction, NULL) == -1)
nperror("sigaction");
/* Disable interpretation of the special control keys so that we can
* use Ctrl-C for other things. */
disable_signals();
return TRUE;
}
#endif /* !NANO_SMALL */
void do_verbatim_input(void)
{
int *kbinput; /* Used to hold verbatim input. */
size_t kbinput_len; /* Length of verbatim input. */
statusbar(_("Verbatim input"));
/* Read in all the verbatim characters. */
kbinput = get_verbatim_kbinput(edit, &kbinput_len);
/* Display all the verbatim characters at once. */
do_output(kbinput, kbinput_len);
free(kbinput);
}
void do_backspace(void)
{
if (current != fileage || current_x > 0) {
do_left(FALSE);
do_delete();
}
}
void do_delete(void)
{
bool do_refresh = FALSE;
/* Do we have to call edit_refresh(), or can we get away with
* update_line()? */
assert(current != NULL && current->data != NULL &&
current_x <= strlen(current->data));
placewewant = xplustabs();
if (current->data[current_x] != '\0') {
size_t linelen = strlen(current->data + current_x);
assert(current_x < strlen(current->data));
/* Let's get dangerous. */
charmove(¤t->data[current_x], ¤t->data[current_x + 1],
linelen);
null_at(¤t->data, linelen + current_x - 1);
#ifndef NANO_SMALL
if (current_x < mark_beginx && mark_beginbuf == current)
mark_beginx--;
#endif
} else if (current != filebot && (current->next != filebot ||
current->data[0] == '\0')) {
/* We can delete the line before filebot only if it is blank: it
* becomes the new magicline then. */
filestruct *foo = current->next;
assert(current_x == strlen(current->data));
/* If we're deleting at the end of a line, we need to call
* edit_refresh(). */
if (current->data[current_x] == '\0')
do_refresh = TRUE;
current->data = charealloc(current->data, current_x +
strlen(foo->data) + 1);
strcpy(current->data + current_x, foo->data);
#ifndef NANO_SMALL
if (mark_beginbuf == current->next) {
mark_beginx += current_x;
mark_beginbuf = current;
}
#endif
if (filebot == foo)
filebot = current;
unlink_node(foo);
delete_node(foo);
renumber(current);
totlines--;
#ifndef DISABLE_WRAPPING
wrap_reset();
#endif
} else
return;
totsize--;
set_modified();
#ifdef ENABLE_COLOR
/* If color syntaxes are turned on, we need to call
* edit_refresh(). */
if (ISSET(COLOR_SYNTAX))
do_refresh = TRUE;
#endif
if (do_refresh)
edit_refresh();
else
update_line(current, current_x);
}
void do_tab(void)
{
int kbinput = '\t';
do_output(&kbinput, 1);
}
/* Someone hits return *gasp!* */
void do_enter(void)
{
filestruct *newnode = make_new_node(current);
size_t extra = 0;
assert(current != NULL && current->data != NULL);
#ifndef NANO_SMALL
/* Do auto-indenting, like the neolithic Turbo Pascal editor. */
if (ISSET(AUTOINDENT)) {
/* If we are breaking the line in the indentation, the new
* indentation should have only current_x characters, and
* current_x should not change. */
extra = indent_length(current->data);
if (extra > current_x)
extra = current_x;
totsize += extra;
}
#endif
newnode->data = charalloc(strlen(current->data + current_x) +
extra + 1);
strcpy(&newnode->data[extra], current->data + current_x);
#ifndef NANO_SMALL
if (ISSET(AUTOINDENT))
strncpy(newnode->data, current->data, extra);
#endif
null_at(¤t->data, current_x);
#ifndef NANO_SMALL
if (current == mark_beginbuf && current_x < mark_beginx) {
mark_beginbuf = newnode;
mark_beginx += extra - current_x;
}
#endif
current_x = extra;
if (current == filebot)
filebot = newnode;
splice_node(current, newnode, current->next);
totsize++;
renumber(current);
current = newnode;
edit_refresh();
totlines++;
set_modified();
placewewant = xplustabs();
}
#ifndef NANO_SMALL
void do_next_word(void)
{
size_t old_pww = placewewant;
const filestruct *old_current = current;
assert(current != NULL && current->data != NULL);
/* Skip letters in this word first. */
while (current->data[current_x] != '\0' &&
isalnum(current->data[current_x]))
current_x++;
for (; current != NULL; current = current->next) {
while (current->data[current_x] != '\0' &&
!isalnum(current->data[current_x]))
current_x++;
if (current->data[current_x] != '\0')
break;
current_x = 0;
}
if (current == NULL)
current = filebot;
placewewant = xplustabs();
/* Update the screen. */
edit_redraw(old_current, old_pww);
}
/* The same thing for backwards. */
void do_prev_word(void)
{
size_t old_pww = placewewant;
const filestruct *old_current = current;
assert(current != NULL && current->data != NULL);
current_x++;
/* Skip letters in this word first. */
while (current_x > 0 && isalnum(current->data[current_x - 1]))
current_x--;
for (; current != NULL; current = current->prev) {
while (current_x > 0 && !isalnum(current->data[current_x - 1]))
current_x--;
if (current_x > 0)
break;
if (current->prev != NULL)
current_x = strlen(current->prev->data) + 1;
}
current_x--;
if (current == NULL) {
current = fileage;
current_x = 0;
} else {
while (current_x > 0 && isalnum(current->data[current_x - 1]))
current_x--;
}
placewewant = xplustabs();
/* Update the screen. */
edit_redraw(old_current, old_pww);
}
void do_mark(void)
{
TOGGLE(MARK_ISSET);
if (ISSET(MARK_ISSET)) {
statusbar(_("Mark Set"));
mark_beginbuf = current;
mark_beginx = current_x;
} else {
statusbar(_("Mark UNset"));
edit_refresh();
}
}
#endif /* !NANO_SMALL */
#ifndef DISABLE_WRAPPING
void wrap_reset(void)
{
same_line_wrap = FALSE;
}
#endif
#ifndef DISABLE_WRAPPING
/* We wrap the given line. Precondition: we assume the cursor has been
* moved forward since the last typed character. Return value: whether
* we wrapped. */
bool do_wrap(filestruct *inptr)
{
size_t len = strlen(inptr->data);
/* Length of the line we wrap. */
size_t i = 0;
/* Generic loop variable. */
ssize_t wrap_loc = -1;
/* Index of inptr->data where we wrap. */
ssize_t word_back = -1;
#ifndef NANO_SMALL
const char *indentation = NULL;
/* Indentation to prepend to the new line. */
size_t indent_len = 0; /* strlen(indentation) */
#endif
const char *after_break; /* Text after the wrap point. */
size_t after_break_len; /* strlen(after_break) */
bool wrapping = FALSE; /* Do we prepend to the next line? */
const char *wrap_line = NULL;
/* The next line, minus indentation. */
size_t wrap_line_len = 0; /* strlen(wrap_line) */
char *newline = NULL; /* The line we create. */
size_t new_line_len = 0; /* Eventual length of newline. */
/* There are three steps. First, we decide where to wrap. Then, we
* create the new wrap line. Finally, we clean up. */
/* Step 1, finding where to wrap. We are going to add a new line
* after a whitespace character. In this step, we set wrap_loc as the
* location of this replacement.
*
* Where should we break the line? We need the last legal wrap point
* such that the last word before it ended at or before fill. If there
* is no such point, we settle for the first legal wrap point.
*
* A legal wrap point is a whitespace character that is not followed by
* whitespace.
*
* If there is no legal wrap point or we found the last character of the
* line, we should return without wrapping.
*
* Note that the initial indentation does not count as a legal wrap
* point if we are going to auto-indent!
*
* Note that the code below could be optimized, by not calling
* strnlenpt() so often. */
#ifndef NANO_SMALL
if (ISSET(AUTOINDENT))
i = indent_length(inptr->data);
#endif
wrap_line = inptr->data + i;
for (; i < len; i++, wrap_line++) {
/* Record where the last word ended. */
if (!isblank(*wrap_line))
word_back = i;
/* If we have found a legal wrap point and the current word
* extends too far, then we stop. */
if (wrap_loc != -1 &&
strnlenpt(inptr->data, word_back + 1) > fill)
break;
/* We record the latest legal wrap point. */
if (word_back != i && !isblank(wrap_line[1]))
wrap_loc = i;
}
if (i == len)
return FALSE;
/* Step 2, making the new wrap line. It will consist of indentation
* + after_break + " " + wrap_line (although indentation and
* wrap_line are conditional on flags and #defines). */
/* after_break is the text that will be moved to the next line. */
after_break = inptr->data + wrap_loc + 1;
after_break_len = len - wrap_loc - 1;
assert(after_break_len == strlen(after_break));
/* new_line_len will later be increased by the lengths of indentation
* and wrap_line. */
new_line_len = after_break_len;
/* We prepend the wrapped text to the next line, if the flag is set,
* and there is a next line, and prepending would not make the line
* too long. */
if (same_line_wrap && inptr->next) {
wrap_line = inptr->next->data;
wrap_line_len = strlen(wrap_line);
/* +1 for the space between after_break and wrap_line. */
if ((new_line_len + 1 + wrap_line_len) <= fill) {
wrapping = TRUE;
new_line_len += (1 + wrap_line_len);
}
}
#ifndef NANO_SMALL
if (ISSET(AUTOINDENT)) {
/* Indentation comes from the next line if wrapping, else from
* this line. */
indentation = (wrapping ? wrap_line : inptr->data);
indent_len = indent_length(indentation);
if (wrapping)
/* The wrap_line text should not duplicate indentation.
* Note in this case we need not increase new_line_len. */
wrap_line += indent_len;
else
new_line_len += indent_len;
}
#endif
/* Now we allocate the new line and copy into it. */
newline = charalloc(new_line_len + 1); /* +1 for \0 */
new_line_len = 0;
*newline = '\0';
#ifndef NANO_SMALL
if (ISSET(AUTOINDENT)) {
strncpy(newline, indentation, indent_len);
newline[indent_len] = '\0';
new_line_len = indent_len;
}
#endif
strcat(newline, after_break);
new_line_len += after_break_len;
/* We end the old line after wrap_loc. Note that this does not eat
* the space. */
null_at(&inptr->data, wrap_loc + 1);
totsize++;
if (wrapping) {
/* In this case, totsize increases by 1 since we add a space
* between after_break and wrap_line. If the line already ends
* in a tab or a space, we don't add a space and decrement
* totsize to account for that. */
if (!isblank(newline[new_line_len - 1]))
strcat(newline, " ");
else
totsize--;
strcat(newline, wrap_line);
free(inptr->next->data);
inptr->next->data = newline;
} else {
filestruct *temp = (filestruct *)nmalloc(sizeof(filestruct));
/* In this case, the file size changes by +1 for the new line,
* and +indent_len for the new indentation. */
#ifndef NANO_SMALL
totsize += indent_len;
#endif
totlines++;
temp->data = newline;
temp->prev = inptr;
temp->next = inptr->next;
temp->prev->next = temp;
/* If temp->next is NULL, then temp is the last line of the
* file, so we must set filebot. */
if (temp->next != NULL)
temp->next->prev = temp;
else
filebot = temp;
}
/* Step 3, clean up. Here we reposition the cursor and mark, and do
* some other sundry things. */
/* Later wraps of this line will be prepended to the next line. */
same_line_wrap = TRUE;
/* Each line knows its line number. We recalculate these if we
* inserted a new line. */
if (!wrapping)
renumber(inptr);
/* If the cursor was after the break point, we must move it. */
if (current_x > wrap_loc) {
current = current->next;
current_x -=
#ifndef NANO_SMALL
-indent_len +
#endif
wrap_loc + 1;
wrap_reset();
placewewant = xplustabs();
}
#ifndef NANO_SMALL
/* If the mark was on this line after the wrap point, we move it
* down. If it was on the next line and we wrapped, we move it
* right. */
if (mark_beginbuf == inptr && mark_beginx > wrap_loc) {
mark_beginbuf = inptr->next;
mark_beginx -= wrap_loc - indent_len + 1;
} else if (wrapping && mark_beginbuf == inptr->next)
mark_beginx += after_break_len;
#endif /* !NANO_SMALL */
return TRUE;
}
#endif /* !DISABLE_WRAPPING */
#ifndef DISABLE_SPELLER
/* A word is misspelled in the file. Let the user replace it. We
* return FALSE if the user cancels. */
bool do_int_spell_fix(const char *word)
{
char *save_search, *save_replace;
size_t current_x_save = current_x, pww_save = placewewant;
filestruct *edittop_save = edittop, *current_save = current;
/* Save where we are. */
bool canceled = FALSE;
/* The return value. */
bool case_sens_set = ISSET(CASE_SENSITIVE);
#ifndef NANO_SMALL
bool reverse_search_set = ISSET(REVERSE_SEARCH);
#endif
#ifdef HAVE_REGEX_H
bool regexp_set = ISSET(USE_REGEXP);
#endif
#ifndef NANO_SMALL
bool old_mark_set = ISSET(MARK_ISSET);
bool added_magicline = FALSE;
/* Whether we added a magicline after filebot. */
bool right_side_up = FALSE;
/* TRUE if (mark_beginbuf, mark_beginx) is the top of the mark,
* FALSE if (current, current_x) is. */
filestruct *top, *bot;
size_t top_x, bot_x;
#endif
/* Make sure spell-check is case sensitive. */
SET(CASE_SENSITIVE);
#ifndef NANO_SMALL
/* Make sure spell-check goes forward only. */
UNSET(REVERSE_SEARCH);
#endif
#ifdef HAVE_REGEX_H
/* Make sure spell-check doesn't use regular expressions. */
UNSET(USE_REGEXP);
#endif
/* Save the current search/replace strings. */
search_init_globals();
save_search = last_search;
save_replace = last_replace;
/* Set the search/replace strings to the misspelled word. */
last_search = mallocstrcpy(NULL, word);
last_replace = mallocstrcpy(NULL, word);
#ifndef NANO_SMALL
if (old_mark_set) {
/* If the mark is on, partition the filestruct so that it
* contains only the marked text, keep track of whether the text
* will have a magicline added when we're done correcting
* misspelled words, and turn the mark off. */
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, &right_side_up);
filepart = partition_filestruct(top, top_x, bot, bot_x);
added_magicline = (filebot->data[0] != '\0');
UNSET(MARK_ISSET);
}
#endif
/* Start from the top of the file. */
edittop = fileage;
current = fileage;
current_x = (size_t)-1;
placewewant = 0;
/* Find the first whole-word occurrence of word. */
findnextstr_wrap_reset();
while (findnextstr(TRUE, TRUE, FALSE, fileage, 0, word, NULL)) {
if (is_whole_word(current_x, current->data, word)) {
edit_refresh();
do_replace_highlight(TRUE, word);
/* Allow all instances of the word to be corrected. */
canceled = (statusq(FALSE, spell_list, word,
#ifndef NANO_SMALL
NULL,
#endif
_("Edit a replacement")) == -1);
do_replace_highlight(FALSE, word);
if (!canceled && strcmp(word, answer) != 0) {
current_x--;
do_replace_loop(word, current, ¤t_x, TRUE,
&canceled);
}
break;
}
}
#ifndef NANO_SMALL
if (old_mark_set) {
/* If the mark was on and we added a magicline, remove it
* now. */
if (added_magicline)
remove_magicline();
/* Put the beginning and the end of the mark at the beginning
* and the end of the spell-checked text. */
if (fileage == filebot)
bot_x += top_x;
if (right_side_up) {
mark_beginx = top_x;
current_x_save = bot_x;
} else {
current_x_save = top_x;
mark_beginx = bot_x;
}
/* Unpartition the filestruct so that it contains all the text
* again, and turn the mark back on. */
unpartition_filestruct(&filepart);
SET(MARK_ISSET);
}
#endif
/* Restore the search/replace strings. */
free(last_search);
last_search = save_search;
free(last_replace);
last_replace = save_replace;
/* Restore where we were. */
edittop = edittop_save;
current = current_save;
current_x = current_x_save;
placewewant = pww_save;
/* Restore case sensitivity setting. */
if (!case_sens_set)
UNSET(CASE_SENSITIVE);
#ifndef NANO_SMALL
/* Restore search/replace direction. */
if (reverse_search_set)
SET(REVERSE_SEARCH);
#endif
#ifdef HAVE_REGEX_H
/* Restore regular expression usage setting. */
if (regexp_set)
SET(USE_REGEXP);
#endif
return !canceled;
}
/* Integrated spell checking using 'spell' program. Return value: NULL
* for normal termination, otherwise the error string. */
const char *do_int_speller(const char *tempfile_name)
{
char *read_buff, *read_buff_ptr, *read_buff_word;
size_t pipe_buff_size, read_buff_size, read_buff_read, bytesread;
int spell_fd[2], sort_fd[2], uniq_fd[2], tempfile_fd = -1;
pid_t pid_spell, pid_sort, pid_uniq;
int spell_status, sort_status, uniq_status;
/* Create all three pipes up front. */
if (pipe(spell_fd) == -1 || pipe(sort_fd) == -1 || pipe(uniq_fd) == -1)
return _("Could not create pipe");
statusbar(_("Creating misspelled word list, please wait..."));
/* A new process to run spell in. */
if ((pid_spell = fork()) == 0) {
/* Child continues (i.e, future spell process). */
close(spell_fd[0]);
/* Replace the standard input with the temp file. */
if ((tempfile_fd = open(tempfile_name, O_RDONLY)) == -1)
goto close_pipes_and_exit;
if (dup2(tempfile_fd, STDIN_FILENO) != STDIN_FILENO)
goto close_pipes_and_exit;
close(tempfile_fd);
/* Send spell's standard output to the pipe. */
if (dup2(spell_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
goto close_pipes_and_exit;
close(spell_fd[1]);
/* Start spell program; we are using PATH. */
execlp("spell", "spell", NULL);
/* Should not be reached, if spell is found. */
exit(1);
}
/* Parent continues here. */
close(spell_fd[1]);
/* A new process to run sort in. */
if ((pid_sort = fork()) == 0) {
/* Child continues (i.e, future spell process). Replace the
* standard input with the standard output of the old pipe. */
if (dup2(spell_fd[0], STDIN_FILENO) != STDIN_FILENO)
goto close_pipes_and_exit;
close(spell_fd[0]);
/* Send sort's standard output to the new pipe. */
if (dup2(sort_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
goto close_pipes_and_exit;
close(sort_fd[1]);
/* Start sort program. Use -f to remove mixed case without
* having to have ANOTHER pipe for tr. If this isn't portable,
* let me know. */
execlp("sort", "sort", "-f", NULL);
/* Should not be reached, if sort is found. */
exit(1);
}
close(spell_fd[0]);
close(sort_fd[1]);
/* A new process to run uniq in. */
if ((pid_uniq = fork()) == 0) {
/* Child continues (i.e, future uniq process). Replace the
* standard input with the standard output of the old pipe. */
if (dup2(sort_fd[0], STDIN_FILENO) != STDIN_FILENO)
goto close_pipes_and_exit;
close(sort_fd[0]);
/* Send uniq's standard output to the new pipe. */
if (dup2(uniq_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
goto close_pipes_and_exit;
close(uniq_fd[1]);
/* Start uniq program; we are using PATH. */
execlp("uniq", "uniq", NULL);
/* Should not be reached, if uniq is found. */
exit(1);
}
close(sort_fd[0]);
close(uniq_fd[1]);
/* Child process was not forked successfully. */
if (pid_spell < 0 || pid_sort < 0 || pid_uniq < 0) {
close(uniq_fd[0]);
return _("Could not fork");
}
/* Get system pipe buffer size. */
if ((pipe_buff_size = fpathconf(uniq_fd[0], _PC_PIPE_BUF)) < 1) {
close(uniq_fd[0]);
return _("Could not get size of pipe buffer");
}
/* Read in the returned spelling errors. */
read_buff_read = 0;
read_buff_size = pipe_buff_size + 1;
read_buff = read_buff_ptr = charalloc(read_buff_size);
while ((bytesread = read(uniq_fd[0], read_buff_ptr, pipe_buff_size)) > 0) {
read_buff_read += bytesread;
read_buff_size += pipe_buff_size;
read_buff = read_buff_ptr = charealloc(read_buff, read_buff_size);
read_buff_ptr += read_buff_read;
}
*read_buff_ptr = (char)NULL;
close(uniq_fd[0]);
/* Process the spelling errors. */
read_buff_word = read_buff_ptr = read_buff;
while (*read_buff_ptr != '\0') {
if ((*read_buff_ptr == '\n') || (*read_buff_ptr == '\r')) {
*read_buff_ptr = (char)NULL;
if (read_buff_word != read_buff_ptr) {
if (!do_int_spell_fix(read_buff_word)) {
read_buff_word = read_buff_ptr;
break;
}
}
read_buff_word = read_buff_ptr + 1;
}
read_buff_ptr++;
}
/* Special case where last word doesn't end with \n or \r. */
if (read_buff_word != read_buff_ptr)
do_int_spell_fix(read_buff_word);
free(read_buff);
replace_abort();
edit_refresh();
/* Process end of spell process. */
waitpid(pid_spell, &spell_status, 0);
waitpid(pid_sort, &sort_status, 0);
waitpid(pid_uniq, &uniq_status, 0);
if (WIFEXITED(spell_status) == 0 || WEXITSTATUS(spell_status))
return _("Error invoking \"spell\"");
if (WIFEXITED(sort_status) == 0 || WEXITSTATUS(sort_status))
return _("Error invoking \"sort -f\"");
if (WIFEXITED(uniq_status) == 0 || WEXITSTATUS(uniq_status))
return _("Error invoking \"uniq\"");
/* Otherwise... */
return NULL;
close_pipes_and_exit:
/* Don't leak any handles. */
close(tempfile_fd);
close(spell_fd[0]);
close(spell_fd[1]);
close(sort_fd[0]);
close(sort_fd[1]);
close(uniq_fd[0]);
close(uniq_fd[1]);
exit(1);
}
/* External spell checking. Return value: NULL for normal termination,
* otherwise the error string. */
const char *do_alt_speller(char *tempfile_name)
{
int alt_spell_status, lineno_save = current->lineno;
size_t current_x_save = current_x, pww_save = placewewant;
int current_y_save = current_y;
pid_t pid_spell;
char *ptr;
static int arglen = 3;
static char **spellargs = NULL;
FILE *f;
#ifndef NANO_SMALL
bool old_mark_set = ISSET(MARK_ISSET);
bool added_magicline = FALSE;
/* Whether we added a magicline after filebot. */
bool right_side_up = FALSE;
/* TRUE if (mark_beginbuf, mark_beginx) is the top of the mark,
* FALSE if (current, current_x) is. */
filestruct *top, *bot;
size_t top_x, bot_x;
int mbb_lineno_save = 0;
/* We're going to close the current file, and open the output of
* the alternate spell command. The line that mark_beginbuf
* points to will be freed, so we save the line number and
* restore afterwards. */
long old_totsize = totsize;
/* Our saved value of totsize, used when we spell-check a marked
* selection. */
if (old_mark_set) {
/* If the mark is on, save the number of the line it starts on,
* and then turn the mark off. */
mbb_lineno_save = mark_beginbuf->lineno;
UNSET(MARK_ISSET);
}
#endif
endwin();
/* Set up an argument list to pass execvp(). */
if (spellargs == NULL) {
spellargs = (char **)nmalloc(arglen * sizeof(char *));
spellargs[0] = strtok(alt_speller, " ");
while ((ptr = strtok(NULL, " ")) != NULL) {
arglen++;
spellargs = (char **)nrealloc(spellargs, arglen * sizeof(char *));
spellargs[arglen - 3] = ptr;
}
spellargs[arglen - 1] = NULL;
}
spellargs[arglen - 2] = tempfile_name;
/* Start a new process for the alternate speller. */
if ((pid_spell = fork()) == 0) {
/* Start alternate spell program; we are using PATH. */
execvp(spellargs[0], spellargs);
/* Should not be reached, if alternate speller is found!!! */
exit(1);
}
/* Could not fork?? */
if (pid_spell < 0)
return _("Could not fork");
/* Wait for alternate speller to complete. */
wait(&alt_spell_status);
if (!WIFEXITED(alt_spell_status) || WEXITSTATUS(alt_spell_status) != 0) {
char *altspell_error = NULL;
char *invoke_error = _("Could not invoke \"%s\"");
int msglen = strlen(invoke_error) + strlen(alt_speller) + 2;
altspell_error = charalloc(msglen);
snprintf(altspell_error, msglen, invoke_error, alt_speller);
return altspell_error;
}
refresh();
/* Restore the terminal to its previous state. */
terminal_init();
#ifndef NANO_SMALL
if (old_mark_set) {
long part_totsize;
/* If the mark was on, partition the filestruct so that it
* contains only the marked text, and keep track of whether the
* temp file (which should contain the spell-checked marked
* text) will have a magicline added when it's reloaded. */
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, &right_side_up);
filepart = partition_filestruct(top, top_x, bot, bot_x);
added_magicline = (filebot->data[0] != '\0');
/* Get the number of characters in the marked text, and subtract
* it from the saved value of totsize. Note that we don't need
* to save totlines. */
get_totals(top, bot, NULL, &part_totsize);
old_totsize -= part_totsize;
}
#endif
/* Reinitialize the filestruct. */
free_filestruct(fileage);
global_init(TRUE);
/* Reload the temp file. Do what load_buffer() would do, except for
* making a new buffer for the temp file if multibuffer support is
* available. */
open_file(tempfile_name, FALSE, &f);
read_file(f, tempfile_name);
current = fileage;
#ifndef NANO_SMALL
if (old_mark_set) {
filestruct *top_save = fileage;
/* If the mark was on and we added a magicline, remove it
* now. */
if (added_magicline)
remove_magicline();
/* Put the beginning and the end of the mark at the beginning
* and the end of the spell-checked text. */
if (fileage == filebot)
bot_x += top_x;
if (right_side_up) {
mark_beginx = top_x;
current_x_save = bot_x;
} else {
current_x_save = top_x;
mark_beginx = bot_x;
}
/* Unpartition the filestruct so that it contains all the text
* again. Note that we've replaced the marked text originally
* in the partition with the spell-checked marked text in the
* temp file. */
unpartition_filestruct(&filepart);
/* Renumber starting with the beginning line of the old
* partition. Also set totlines to the new number of lines in
* the file, add the number of characters in the spell-checked
* marked text to the saved value of totsize, and then make that
* saved value the actual value. */
renumber(top_save);
totlines = filebot->lineno;
old_totsize += totsize;
totsize = old_totsize;
/* Assign mark_beginbuf to the line where the mark began
* before. */
do_gotopos(mbb_lineno_save, mark_beginx, current_y_save, 0);
mark_beginbuf = current;
/* Assign mark_beginx to the location in mark_beginbuf where the
* mark began before, adjusted for any shortening of the
* line. */
mark_beginx = current_x;
/* Turn the mark back on. */
SET(MARK_ISSET);
}
#endif
/* Go back to the old position, mark the file as modified, and make
* sure that the titlebar is refreshed. */
do_gotopos(lineno_save, current_x_save, current_y_save, pww_save);
set_modified();
clearok(topwin, FALSE);
titlebar(NULL);
return NULL;
}
void do_spell(void)
{
int i;
char *temp = safe_tempnam(0, "nano.");
const char *spell_msg;
if (temp == NULL) {
statusbar(_("Could not create temp file: %s"), strerror(errno));
return;
}
#ifndef NANO_SMALL
if (ISSET(MARK_ISSET))
i = write_marked(temp, TRUE, FALSE);
else
#endif
i = write_file(temp, TRUE, FALSE, FALSE);
if (i == -1) {
statusbar(_("Error writing temp file: %s"), strerror(errno));
free(temp);
return;
}
#ifdef ENABLE_MULTIBUFFER
/* Update the current open_files entry before spell-checking, in
* case any problems occur. */
add_open_file(TRUE);
#endif
spell_msg = alt_speller != NULL ? do_alt_speller(temp) :
do_int_speller(temp);
unlink(temp);
free(temp);
if (spell_msg != NULL)
statusbar(_("Spell checking failed: %s: %s"), spell_msg,
strerror(errno));
else
statusbar(_("Finished checking spelling"));
}
#endif /* !DISABLE_SPELLER */
#if !defined(NANO_SMALL) || !defined(DISABLE_JUSTIFY)
/* The "indentation" of a line is the whitespace between the quote part
* and the non-whitespace of the line. */
size_t indent_length(const char *line)
{
size_t len = 0;
assert(line != NULL);
while (isblank(*line)) {
line++;
len++;
}
return len;
}
#endif /* !NANO_SMALL || !DISABLE_JUSTIFY */
#ifndef DISABLE_JUSTIFY
/* justify_format() replaces Tab by Space and multiple spaces by 1
* (except it maintains 2 after a non-repeated character in punct
* followed by a character in brackets). Note that the terminating \0
* counts as a space.
*
* justify_format() might make line->data shorter, and change the actual
* pointer with null_at().
*
* justify_format() will not look at the first skip characters of line.
* skip should be at most strlen(line->data). The character at
* line[skip + 1] must not be whitespace. */
void justify_format(filestruct *line, size_t skip)
{
char *back, *front;
/* These four asserts are assumptions about the input data. */
assert(line != NULL);
assert(line->data != NULL);
assert(skip < strlen(line->data));
assert(!isblank(line->data[skip]));
back = line->data + skip;
for (front = back; ; front++) {
bool remove_space = FALSE;
/* Do we want to remove this space? */
if (*front == '\t')
*front = ' ';
/* These tests are safe since line->data + skip is not a
* space. */
if ((*front == '\0' || *front == ' ') && *(front - 1) == ' ') {
const char *bob = back - 2;
remove_space = TRUE;
for (; bob >= line->data + skip; bob--) {
if (strchr(punct, *bob) != NULL) {
/* If this character is in punct, don't remove the
* space unless this character and the character
* before it are the same. */
remove_space = (bob > line->data + skip &&
*bob == *(bob - 1));
break;
}
if (strchr(brackets, *bob) == NULL)
break;
}
}
if (remove_space) {
/* Now *front is a space we want to remove. We do that by
* simply failing to assign it to *back. */
#ifndef NANO_SMALL
if (mark_beginbuf == line && back - line->data < mark_beginx)
mark_beginx--;
#endif
if (*front == '\0')
*(back - 1) = '\0';
} else {
*back = *front;
back++;
}
if (*front == '\0')
break;
}
back--;
assert(*back == '\0' && *front == '\0');
/* Now back is the new end of line->data. */
if (back != front) {
totsize -= front - back;
null_at(&line->data, back - line->data);
#ifndef NANO_SMALL
if (mark_beginbuf == line && back - line->data < mark_beginx)
mark_beginx = back - line->data;
#endif
}
}
/* The "quote part" of a line is the largest initial substring matching
* the quote string. This function returns the length of the quote part
* of the given line.
*
* Note that if !HAVE_REGEX_H then we match concatenated copies of
* quotestr. */
size_t quote_length(const char *line)
{
#ifdef HAVE_REGEX_H
regmatch_t matches;
int rc = regexec("ereg, line, 1, &matches, 0);
if (rc == REG_NOMATCH || matches.rm_so == (regoff_t)-1)
return 0;
/* matches.rm_so should be 0, since the quote string should start
* with the caret ^. */
return matches.rm_eo;
#else /* !HAVE_REGEX_H */
size_t qdepth = 0;
/* Compute quote depth level. */
while (strncmp(line + qdepth, quotestr, quotelen) == 0)
qdepth += quotelen;
return qdepth;
#endif /* !HAVE_REGEX_H */
}
/* a_line and b_line are lines of text. The quotation part of a_line is
* the first a_quote characters. Check that the quotation part of
* b_line is the same. */
bool quotes_match(const char *a_line, size_t a_quote, const char
*b_line)
{
/* Here is the assumption about a_quote: */
assert(a_quote == quote_length(a_line));
return a_quote == quote_length(b_line) &&
strncmp(a_line, b_line, a_quote) == 0;
}
/* We assume a_line and b_line have no quote part. Then, we return
* whether b_line could follow a_line in a paragraph. */
bool indents_match(const char *a_line, size_t a_indent, const char
*b_line, size_t b_indent)
{
assert(a_indent == indent_length(a_line));
assert(b_indent == indent_length(b_line));
return b_indent <= a_indent &&
strncmp(a_line, b_line, b_indent) == 0;
}
/* Is foo the beginning of a paragraph?
*
* A line of text consists of a "quote part", followed by an
* "indentation part", followed by text. The functions quote_length()
* and indent_length() calculate these parts.
*
* A line is "part of a paragraph" if it has a part not in the quote
* part or the indentation.
*
* A line is "the beginning of a paragraph" if it is part of a
* paragraph and
* 1) it is the top line of the file, or
* 2) the line above it is not part of a paragraph, or
* 3) the line above it does not have precisely the same quote
* part, or
* 4) the indentation of this line is not an initial substring of
* the indentation of the previous line, or
* 5) this line has no quote part and some indentation, and
* AUTOINDENT is not set.
* The reason for number 5) is that if AUTOINDENT is not set, then an
* indented line is expected to start a paragraph, like in books.
* Thus, nano can justify an indented paragraph only if AUTOINDENT is
* turned on. */
bool begpar(const filestruct *const foo)
{
size_t quote_len;
size_t indent_len;
size_t temp_id_len;
/* Case 1). */
if (foo->prev == NULL)
return TRUE;
quote_len = quote_length(foo->data);
indent_len = indent_length(foo->data + quote_len);
/* Not part of a paragraph. */
if (foo->data[quote_len + indent_len] == '\0')
return FALSE;
/* Case 3). */
if (!quotes_match(foo->data, quote_len, foo->prev->data))
return TRUE;
temp_id_len = indent_length(foo->prev->data + quote_len);
/* Case 2) or 5) or 4). */
if (foo->prev->data[quote_len + temp_id_len] == '\0' ||
(quote_len == 0 && indent_len > 0
#ifndef NANO_SMALL
&& !ISSET(AUTOINDENT)
#endif
) || !indents_match(foo->prev->data + quote_len, temp_id_len,
foo->data + quote_len, indent_len))
return TRUE;
return FALSE;
}
/* We find the last beginning-of-paragraph line before the current
* line. */
void do_para_begin(void)
{
const filestruct *old_current = current;
const size_t old_pww = placewewant;
current_x = 0;
placewewant = 0;
if (current->prev != NULL) {
do {
current = current->prev;
current_y--;
} while (!begpar(current));
}
edit_redraw(old_current, old_pww);
}
bool inpar(const char *str)
{
size_t quote_len = quote_length(str);
return str[quote_len + indent_length(str + quote_len)] != '\0';
}
/* A line is the last line of a paragraph if it is in a paragraph, and
* the next line isn't, or is the beginning of a paragraph. We move
* down to the end of a paragraph, then one line farther. */
void do_para_end(void)
{
const filestruct *const old_current = current;
const size_t old_pww = placewewant;
current_x = 0;
placewewant = 0;
while (current->next != NULL && !inpar(current->data))
current = current->next;
while (current->next != NULL && inpar(current->next->data) &&
!begpar(current->next)) {
current = current->next;
current_y++;
}
if (current->next != NULL)
current = current->next;
edit_redraw(old_current, old_pww);
}
/* Put the next par_len lines, starting with first_line, into the
* justify buffer, leaving copies of those lines in place. Assume there
* are enough lines after first_line. Return the new copy of
* first_line. */
filestruct *backup_lines(filestruct *first_line, size_t par_len, size_t
quote_len)
{
filestruct *top = first_line;
/* The top of the paragraph we're backing up. */
filestruct *bot = first_line;
/* The bottom of the paragraph we're backing up. */
size_t i;
/* Generic loop variable. */
size_t current_x_save = current_x;
int fl_lineno_save = first_line->lineno;
int edittop_lineno_save = edittop->lineno;
int current_lineno_save = current->lineno;
#ifndef NANO_SMALL
bool old_mark_set = ISSET(MARK_ISSET);
int mbb_lineno_save = 0;
if (old_mark_set)
mbb_lineno_save = mark_beginbuf->lineno;
#endif
/* Move bot down par_len lines to the newline after the last line of
* the paragraph. */
for (i = par_len; i > 0; i--)
bot = bot->next;
/* Move the paragraph from the main filestruct to the justify
* buffer. */
move_to_filestruct(&jusbuffer, &jusbottom, top, 0, bot, 0);
/* Copy the paragraph from the justify buffer to the main
* filestruct. */
copy_from_filestruct(jusbuffer, jusbottom);
/* Move upward from the last line of the paragraph to the first
* line, putting first_line, edittop, current, and mark_beginbuf at
* the same lines in the copied paragraph that they had in the
* original paragraph. */
top = current->prev;
for (i = par_len; i > 0; i--) {
if (top->lineno == fl_lineno_save)
first_line = top;
if (top->lineno == edittop_lineno_save)
edittop = top;
if (top->lineno == current_lineno_save)
current = top;
#ifndef NANO_SMALL
if (old_mark_set && top->lineno == mbb_lineno_save)
mark_beginbuf = top;
#endif
top = top->prev;
}
/* Put current_x at the same place in the copied paragraph that it
* had in the original paragraph. */
current_x = current_x_save;
set_modified();
return first_line;
}
/* Is it possible to break line at or before goal? */
bool breakable(const char *line, ssize_t goal)
{
for (; *line != '\0' && goal >= 0; line++) {
if (isblank(*line))
return TRUE;
if (is_cntrl_char(*line))
goal -= 2;
else
goal -= 1;
}
/* If goal is not negative, the whole line (one word) was short
* enough. */
return goal >= 0;
}
/* We are trying to break a chunk off line. We find the last space such
* that the display length to there is at most goal + 1. If there is no
* such space, and force is TRUE, then we find the first space. Anyway,
* we then take the last space in that group of spaces. The terminating
* '\0' counts as a space. */
ssize_t break_line(const char *line, ssize_t goal, bool force)
{
ssize_t space_loc = -1;
/* Current tentative return value. Index of the last space we
* found with short enough display width. */
ssize_t cur_loc = 0;
/* Current index in line. */
assert(line != NULL);
for (; *line != '\0' && goal >= 0; line++, cur_loc++) {
if (*line == ' ')
space_loc = cur_loc;
assert(*line != '\t');
if (is_cntrl_char(*line))
goal -= 2;
else
goal--;
}
if (goal >= 0)
/* In fact, the whole line displays shorter than goal. */
return cur_loc;
if (space_loc == -1) {
/* No space found short enough. */
if (force)
for (; *line != '\0'; line++, cur_loc++)
if (*line == ' ' && *(line + 1) != ' ' && *(line + 1) != '\0')
return cur_loc;
return -1;
}
/* Perhaps the character after space_loc is a space. But because
* of justify_format(), there can be only two adjacent. */
if (*(line - cur_loc + space_loc + 1) == ' ' ||
*(line - cur_loc + space_loc + 1) == '\0')
space_loc++;
return space_loc;
}
/* Find the beginning of the current paragraph if we're in one, or the
* beginning of the next paragraph if we're not. Afterwards, save the
* quote length and paragraph length in *quote and *par. Return FALSE
* if we found a paragraph, or TRUE if there was an error or we didn't
* find a paragraph.
*
* See the comment at begpar() for more about when a line is the
* beginning of a paragraph. */
bool do_para_search(size_t *const quote, size_t *const par)
{
size_t quote_len;
/* Length of the initial quotation of the paragraph we
* search. */
size_t par_len;
/* Number of lines in that paragraph. */
size_t indent_len;
/* Generic indentation length. */
filestruct *line;
/* Generic line of text. */
#ifdef HAVE_REGEX_H
if (quoterc != 0) {
statusbar(_("Bad quote string %s: %s"), quotestr, quoteerr);
return TRUE;
}
#endif
/* Here is an assumption that is always true anyway. */
assert(current != NULL);
current_x = 0;
quote_len = quote_length(current->data);
indent_len = indent_length(current->data + quote_len);
/* Here we find the first line of the paragraph to search. If the
* current line is in a paragraph, then we move back to the first
* line of the paragraph. Otherwise, we move to the first line that
* is in a paragraph. */
if (current->data[quote_len + indent_len] != '\0') {
/* This line is part of a paragraph. So we must search back to
* the first line of this paragraph. First we check items 1)
* and 3) above. */
while (current->prev != NULL && quotes_match(current->data,
quote_len, current->prev->data)) {
size_t temp_id_len =
indent_length(current->prev->data + quote_len);
/* The indentation length of the previous line. */
/* Is this line the beginning of a paragraph, according to
* items 2), 5), or 4) above? If so, stop. */
if (current->prev->data[quote_len + temp_id_len] == '\0' ||
(quote_len == 0 && indent_len > 0
#ifndef NANO_SMALL
&& !ISSET(AUTOINDENT)
#endif
) || !indents_match(current->prev->data + quote_len,
temp_id_len, current->data + quote_len, indent_len))
break;
indent_len = temp_id_len;
current = current->prev;
current_y--;
}
} else {
/* This line is not part of a paragraph. Move down until we get
* to a non "blank" line. */
do {
/* There is no next paragraph, so nothing to move to. */
if (current->next == NULL) {
placewewant = 0;
return TRUE;
}
current = current->next;
current_y++;
quote_len = quote_length(current->data);
indent_len = indent_length(current->data + quote_len);
} while (current->data[quote_len + indent_len] == '\0');
}
/* Now current is the first line of the paragraph, and quote_len is
* the quotation length of that line. */
/* Next step, compute par_len, the number of lines in this
* paragraph. */
line = current;
par_len = 1;
indent_len = indent_length(line->data + quote_len);
while (line->next != NULL &&
quotes_match(current->data, quote_len, line->next->data)) {
size_t temp_id_len = indent_length(line->next->data + quote_len);
if (!indents_match(line->data + quote_len, indent_len,
line->next->data + quote_len, temp_id_len) ||
line->next->data[quote_len + temp_id_len] == '\0' ||
(quote_len == 0 && temp_id_len > 0
#ifndef NANO_SMALL
&& !ISSET(AUTOINDENT)
#endif
))
break;
indent_len = temp_id_len;
line = line->next;
par_len++;
}
/* Now par_len is the number of lines in this paragraph. We should
* never call quotes_match() or quote_length() again. */
/* Save the values of quote_len and par_len. */
assert(quote != NULL && par != NULL);
*quote = quote_len;
*par = par_len;
return FALSE;
}
/* If full_justify is TRUE, justify the entire file. Otherwise, justify
* the current paragraph. */
void do_justify(bool full_justify)
{
filestruct *first_par_line = NULL;
/* Will be the first line of the resulting justified paragraph.
* For restoring after unjustify. */
filestruct *last_par_line;
/* Will be the line containing the newline after the last line
* of the result. Also for restoring after unjustify. */
bool allow_respacing;
/* Whether we should change the spacing at the end of a line
* after justifying it. This should be TRUE whenever we move
* to the next line after justifying the current line. */
/* We save these global variables to be restored if the user
* unjustifies. Note that we don't need to save totlines. */
size_t current_x_save = current_x;
int current_y_save = current_y;
long flags_save = flags, totsize_save = totsize;
filestruct *edittop_save = edittop, *current_save = current;
#ifndef NANO_SMALL
filestruct *mark_beginbuf_save = mark_beginbuf;
size_t mark_beginx_save = mark_beginx;
#endif
int kbinput;
bool meta_key, func_key, s_or_t;
/* If we're justifying the entire file, start at the beginning. */
if (full_justify)
current = fileage;
last_par_line = current;
while (TRUE) {
size_t quote_len;
/* Length of the initial quotation of the paragraph we
* justify. */
size_t par_len;
/* Number of lines in that paragraph. */
/* Find the first line of the paragraph to be justified. That
* is the start of this paragraph if we're in one, or the start
* of the next otherwise. Save the quote length and paragraph
* length (number of lines). Don't refresh the screen yet,
* since we'll do that after we justify. If the search
* failed, we're justifying the whole file, and the search
* didn't leave us on the last line of the file, set the last
* line of the text to be justified to the last line of the file
* and break out of the loop. Otherwise, refresh the screen and
* get out. */
if (do_para_search("e_len, &par_len)) {
if (full_justify && current != filebot) {
last_par_line = filebot;
break;
} else {
edit_refresh();
return;
}
}
/* Next step, we loop through the lines of this paragraph,
* justifying each one individually. */
for (; par_len > 0; current_y++, par_len--) {
size_t indent_len; /* Generic indentation length. */
size_t line_len;
size_t display_len;
/* The width of current in screen columns. */
ssize_t break_pos;
/* Where we will break the line. */
/* We'll be moving to the next line after justifying the
* current line in almost all cases, so allow changing the
* spacing at the ends of justified lines by default. */
allow_respacing = TRUE;
indent_len = quote_len + indent_length(current->data +
quote_len);
/* If we haven't already done it, copy the original
* paragraph to the justify buffer. */
if (first_par_line == NULL)
first_par_line = backup_lines(current, full_justify ?
filebot->lineno - current->lineno : par_len,
quote_len);
/* Now we call justify_format() on the current line of the
* paragraph, which will remove excess spaces from it and
* change tabs to spaces. */
justify_format(current, quote_len +
indent_length(current->data + quote_len));
line_len = strlen(current->data);
display_len = strlenpt(current->data);
if (display_len > fill) {
/* The line is too long. Try to wrap it to the next. */
break_pos = break_line(current->data + indent_len,
fill - strnlenpt(current->data, indent_len),
TRUE);
if (break_pos == -1 || break_pos + indent_len ==
line_len)
/* We can't break the line, or don't need to, so
* just go on to the next. */
goto continue_loc;
break_pos += indent_len;
assert(break_pos < line_len);
if (par_len == 1) {
/* There is no next line in this paragraph. We make
* a new line and copy text after break_pos into
* it. */
splice_node(current, make_new_node(current),
current->next);
/* In a non-quoted paragraph, we copy the indent
* only if AUTOINDENT is turned on. */
if (quote_len == 0
#ifndef NANO_SMALL
&& !ISSET(AUTOINDENT)
#endif
)
indent_len = 0;
current->next->data = charalloc(indent_len +
line_len - break_pos);
strncpy(current->next->data, current->data,
indent_len);
strcpy(current->next->data + indent_len,
current->data + break_pos + 1);
assert(strlen(current->next->data) ==
indent_len + line_len - break_pos - 1);
totlines++;
totsize += indent_len;
par_len++;
} else {
size_t next_line_len = strlen(current->next->data);
indent_len = quote_len +
indent_length(current->next->data + quote_len);
current->next->data =
charealloc(current->next->data, next_line_len +
line_len - break_pos + 1);
charmove(current->next->data + indent_len +
line_len - break_pos, current->next->data +
indent_len, next_line_len - indent_len + 1);
strcpy(current->next->data + indent_len,
current->data + break_pos + 1);
current->next->data[indent_len + line_len -
break_pos - 1] = ' ';
#ifndef NANO_SMALL
if (mark_beginbuf == current->next) {
if (mark_beginx < indent_len)
mark_beginx = indent_len;
mark_beginx += line_len - break_pos;
}
#endif
}
#ifndef NANO_SMALL
if (mark_beginbuf == current &&
mark_beginx > break_pos) {
mark_beginbuf = current->next;
mark_beginx -= break_pos + 1 - indent_len;
}
#endif
null_at(¤t->data, break_pos);
/* Go to the next line. */
current = current->next;
} else if (display_len < fill && par_len > 1) {
size_t next_line_len;
indent_len = quote_len +
indent_length(current->next->data + quote_len);
/* If we can't pull a word from the next line up to this
* one, just go on. */
if (!breakable(current->next->data + indent_len,
fill - display_len - 1))
goto continue_loc;
break_pos = break_line(current->next->data + indent_len,
fill - display_len - 1, FALSE);
assert(break_pos != -1);
current->data = charealloc(current->data,
line_len + break_pos + 2);
current->data[line_len] = ' ';
strncpy(current->data + line_len + 1,
current->next->data + indent_len, break_pos);
current->data[line_len + break_pos + 1] = '\0';
#ifndef NANO_SMALL
if (mark_beginbuf == current->next) {
if (mark_beginx < indent_len + break_pos) {
mark_beginbuf = current;
if (mark_beginx <= indent_len)
mark_beginx = line_len + 1;
else
mark_beginx = line_len + 1 + mark_beginx -
indent_len;
} else
mark_beginx -= break_pos + 1;
}
#endif
next_line_len = strlen(current->next->data);
if (indent_len + break_pos == next_line_len) {
filestruct *line = current->next;
/* Don't destroy edittop! */
if (line == edittop)
edittop = current;
unlink_node(line);
delete_node(line);
totlines--;
totsize -= indent_len;
current_y--;
/* Don't go to the next line. Accordingly, don't
* allow changing the spacing at the end of the
* previous justified line, so that we don't end up
* doing it more than once on the same line. */
allow_respacing = FALSE;
} else {
charmove(current->next->data + indent_len,
current->next->data + indent_len + break_pos + 1,
next_line_len - break_pos - indent_len);
null_at(¤t->next->data, next_line_len -
break_pos);
/* Go to the next line. */
current = current->next;
}
} else
continue_loc:
/* Go to the next line. */
current = current->next;
/* We've moved to the next line after justifying the
* current line. If the justified line was not the last
* line of the paragraph, add a space to the end of it to
* replace the one removed or left out by justify_format().
* If it was the last line of the paragraph, and
* justify_format() left a space on the end of it, remove
* the space. */
if (allow_respacing) {
size_t prev_line_len = strlen(current->prev->data);
if (par_len > 1) {
current->prev->data = charealloc(current->prev->data,
prev_line_len + 2);
current->prev->data[prev_line_len] = ' ';
current->prev->data[prev_line_len + 1] = '\0';
totsize++;
} else if (par_len == 1 &&
current->prev->data[prev_line_len - 1] == ' ') {
current->prev->data =
charealloc(current->prev->data, prev_line_len);
current->prev->data[prev_line_len - 1] = '\0';
totsize--;
}
}
}
/* We've just justified a paragraph. If we're not justifying the
* entire file, break out of the loop. Otherwise, continue the
* loop so that we justify all the paragraphs in the file. */
if (!full_justify)
break;
} /* while (TRUE) */
/* We are now done justifying the paragraph or the file, so clean
* up. totlines, totsize, and current_y have been maintained above.
* Set last_par_line to the new end of the paragraph, update
* fileage, and renumber() since edit_refresh() needs the line
* numbers to be right (but only do the last two if we actually
* justified something). */
last_par_line = current;
if (first_par_line != NULL) {
if (first_par_line->prev == NULL)
fileage = first_par_line;
renumber(first_par_line);
}
edit_refresh();
statusbar(_("Can now UnJustify!"));
/* Display the shortcut list with UnJustify. */
shortcut_init(TRUE);
display_main_list();
/* Now get a keystroke and see if it's unjustify. If not, put back
* the keystroke and return. */
kbinput = do_input(&meta_key, &func_key, &s_or_t, FALSE);
if (!meta_key && !func_key && s_or_t &&
kbinput == NANO_UNJUSTIFY_KEY) {
/* Restore the justify we just did (ungrateful user!). */
current = current_save;
current_x = current_x_save;
current_y = current_y_save;
edittop = edittop_save;
/* Splice the justify buffer back into the file, but only if we
* actually justified something. */
if (first_par_line != NULL) {
filestruct *bot_save;
/* Partition the filestruct so that it contains only the
* text of the justified paragraph. */
filepart = partition_filestruct(first_par_line, 0,
last_par_line, 0);
/* Remove the text of the justified paragraph, and
* put the text in the justify buffer in its place. */
free_filestruct(fileage);
fileage = jusbuffer;
filebot = jusbottom;
bot_save = filebot;
/* Unpartition the filestruct so that it contains all the
* text again. Note that the justified paragraph has been
* replaced with the unjustified paragraph. */
unpartition_filestruct(&filepart);
/* Renumber starting with the ending line of the old
* partition. */
if (bot_save->next != NULL)
renumber(bot_save->next);
/* Restore global variables from before the justify. */
totsize = totsize_save;
totlines = filebot->lineno;
#ifndef NANO_SMALL
mark_beginbuf = mark_beginbuf_save;
mark_beginx = mark_beginx_save;
#endif
flags = flags_save;
/* Clear the justify buffer. */
jusbuffer = NULL;
if (!ISSET(MODIFIED))
titlebar(NULL);
edit_refresh();
}
} else {
unget_kbinput(kbinput, meta_key, func_key);
/* Blow away the text in the justify buffer. */
free_filestruct(jusbuffer);
jusbuffer = NULL;
}
blank_statusbar();
/* Display the shortcut list with UnCut. */
shortcut_init(FALSE);
display_main_list();
}
void do_justify_void(void)
{
do_justify(FALSE);
}
void do_full_justify(void)
{
do_justify(TRUE);
}
#endif /* !DISABLE_JUSTIFY */
void do_exit(void)
{
int i;
if (!ISSET(MODIFIED))
i = 0; /* Pretend the user chose not to save. */
else if (ISSET(TEMP_FILE))
i = 1;
else
i = do_yesno(FALSE,
_("Save modified buffer (ANSWERING \"No\" WILL DESTROY CHANGES) ? "));
#ifdef DEBUG
dump_buffer(fileage);
#endif
if (i == 0 || (i == 1 && do_writeout(TRUE) > 0)) {
#ifdef ENABLE_MULTIBUFFER
/* Exit only if there are no more open file buffers. */
if (!close_open_file())
#endif
finish();
} else if (i != 1)
statusbar(_("Cancelled"));
display_main_list();
}
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_SMALL
/* Trap SIGWINCH because we want to handle window resizes. */
act.sa_handler = handle_sigwinch;
sigaction(SIGWINCH, &act, NULL);
allow_pending_sigwinch(FALSE);
#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_cont;
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)
{
endwin();
printf("\n\n\n\n\n%s\n", _("Use \"fg\" to return to nano"));
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);
}
/* Handler for SIGCONT (continue after suspend). */
RETSIGTYPE do_cont(int signal)
{
#ifndef NANO_SMALL
/* Perhaps the user resized the window while we slept. Handle it
* and update the screen in the process. */
handle_sigwinch(0);
#else
/* Just update the screen. */
doupdate();
#endif
}
#ifndef NANO_SMALL
void handle_sigwinch(int s)
{
const char *tty = ttyname(0);
int fd;
int 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;
/* Could check whether the COLS or LINES changed, and return
* otherwise. EXCEPT, that COLS and LINES are ncurses global
* variables, and in some cases ncurses has already updated them.
* But not in all cases, argh. */
COLS = win.ws_col;
LINES = win.ws_row;
editwinrows = LINES - 5 + no_help();
if (editwinrows < MIN_EDITOR_ROWS || COLS < MIN_EDITOR_COLS)
die_too_small();
#ifndef DISABLE_WRAPJUSTIFY
fill = wrap_at;
if (fill <= 0)
fill += COLS;
if (fill < 0)
fill = 0;
#endif
hblank = charealloc(hblank, COLS + 1);
memset(hblank, ' ', COLS);
hblank[COLS] = '\0';
/* If we've partitioned the filestruct, unpartition it now. */
if (filepart != NULL)
unpartition_filestruct(&filepart);
#ifndef DISABLE_JUSTIFY
/* If the justify buffer isn't empty, blow away the text in it and
* display the shortcut list with UnCut. */
if (jusbuffer != NULL) {
free_filestruct(jusbuffer);
jusbuffer = NULL;
shortcut_init(FALSE);
}
#endif
#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();
refresh();
#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. */
blank_statusbar();
display_main_list();
total_refresh();
/* Turn cursor back on for sure. */
curs_set(1);
/* Reset all the input routines that rely on character sequences. */
reset_kbinput();
/* Jump back to the main loop. */
siglongjmp(jmpbuf, 1);
}
void allow_pending_sigwinch(bool allow)
{
sigset_t winch;
sigemptyset(&winch);
sigaddset(&winch, SIGWINCH);
if (allow)
sigprocmask(SIG_UNBLOCK, &winch, NULL);
else
sigprocmask(SIG_BLOCK, &winch, NULL);
}
#endif /* !NANO_SMALL */
#ifndef NANO_SMALL
void do_toggle(const toggle *which)
{
bool enabled;
TOGGLE(which->flag);
switch (which->val) {
case TOGGLE_SUSPEND_KEY:
signal_init();
break;
#ifndef DISABLE_MOUSE
case TOGGLE_MOUSE_KEY:
mouse_init();
break;
#endif
case TOGGLE_NOHELP_KEY:
blank_statusbar();
blank_bottombars();
wrefresh(bottomwin);
window_init();
edit_refresh();
display_main_list();
break;
#ifdef ENABLE_COLOR
case TOGGLE_SYNTAX_KEY:
edit_refresh();
break;
#endif
#ifdef ENABLE_NANORC
case TOGGLE_WHITESPACE_KEY:
titlebar(NULL);
edit_refresh();
break;
#endif
}
/* We are assuming here that shortcut_init() above didn't free and
* reallocate the toggles. */
enabled = ISSET(which->flag);
if (which->val == TOGGLE_NOHELP_KEY || which->val == TOGGLE_WRAP_KEY)
enabled = !enabled;
statusbar("%s %s", which->desc,
enabled ? _("enabled") : _("disabled"));
}
#endif /* !NANO_SMALL */
void disable_extended_input(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag &= ~IEXTEN;
tcsetattr(0, TCSANOW, &term);
}
void disable_signals(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag &= ~ISIG;
tcsetattr(0, TCSANOW, &term);
}
#ifndef NANO_SMALL
void enable_signals(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_lflag |= ISIG;
tcsetattr(0, TCSANOW, &term);
}
#endif
void disable_flow_control(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_iflag &= ~(IXON|IXOFF);
tcsetattr(0, TCSANOW, &term);
}
void enable_flow_control(void)
{
struct termios term;
tcgetattr(0, &term);
term.c_iflag |= (IXON|IXOFF);
tcsetattr(0, TCSANOW, &term);
}
/* Set up the terminal state. Put the terminal in cbreak mode (read one
* character at a time and interpret the special control keys), 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 processing, disable interpretation of the special control keys,
* and if we're not in preserve mode, disable interpretation of the flow
* control characters too. */
void terminal_init(void)
{
cbreak();
nonl();
noecho();
disable_extended_input();
disable_signals();
if (!ISSET(PRESERVE))
disable_flow_control();
}
int do_input(bool *meta_key, bool *func_key, bool *s_or_t, bool
allow_funcs)
{
int input;
/* The character we read in. */
static int *kbinput = NULL;
/* The input buffer. */
static size_t kbinput_len = 0;
/* The length of the input buffer. */
const shortcut *s;
bool have_shortcut;
#ifndef NANO_SMALL
const toggle *t;
bool have_toggle;
#endif
*s_or_t = FALSE;
/* Read in a character. */
input = get_kbinput(edit, meta_key, func_key);
#ifndef DISABLE_MOUSE
/* If we got a mouse click and it was on a shortcut, read in the
* shortcut character. */
if (allow_funcs && func_key && input == KEY_MOUSE) {
if (do_mouse())
input = get_kbinput(edit, meta_key, func_key);
else
input = ERR;
}
#endif
/* Check for a shortcut in the main list. */
s = get_shortcut(main_list, &input, meta_key, func_key);
/* If we got a shortcut from the main list, or a "universal"
* edit window shortcut, set have_shortcut to TRUE. */
have_shortcut = (s != NULL || input == NANO_XON_KEY ||
input == NANO_XOFF_KEY || input == NANO_SUSPEND_KEY);
#ifndef NANO_SMALL
/* Check for a toggle in the main list. */
t = get_toggle(input, *meta_key);
/* If we got a toggle from the main list, set have_toggle to
* TRUE. */
have_toggle = (t != NULL);
#endif
/* Set s_or_t to TRUE if we got a shortcut or toggle. */
*s_or_t = (have_shortcut
#ifndef NANO_SMALL
|| have_toggle
#endif
);
if (allow_funcs) {
/* If we got a character, and it isn't a shortcut, toggle, or
* control character, it's a normal text character. Display the
* warning if we're in view mode, or add the character to the
* input buffer if we're not. */
if (input != ERR && *s_or_t == FALSE && !is_cntrl_char(input)) {
if (ISSET(VIEW_MODE))
print_view_warning();
else {
kbinput_len++;
kbinput = (int *)nrealloc(kbinput, kbinput_len *
sizeof(int));
kbinput[kbinput_len - 1] = input;
}
}
/* 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
* display all the characters in the input buffer if it isn't
* empty. Note that it should be empty if we're in view
* mode. */
if (*s_or_t == TRUE || get_buffer_len() == 0) {
if (kbinput != NULL) {
/* Display all the characters in the input buffer at
* once. */
do_output(kbinput, kbinput_len);
/* Empty the input buffer. */
kbinput_len = 0;
free(kbinput);
kbinput = NULL;
}
}
if (have_shortcut) {
switch (input) {
/* Handle the "universal" edit window shortcuts. */
case NANO_XON_KEY:
statusbar(_("XON ignored, mumble mumble."));
break;
case NANO_XOFF_KEY:
statusbar(_("XOFF ignored, mumble mumble."));
break;
#ifndef NANO_SMALL
case NANO_SUSPEND_KEY:
if (ISSET(SUSPEND))
do_suspend(0);
break;
#endif
/* Handle the normal edit window shortcuts. */
default:
/* Blow away the text in the cutbuffer if we aren't
* cutting text. */
if (s->func != do_cut_text)
cutbuffer_reset();
/* Run the function associated with this shortcut,
* if there is one. */
if (s->func != NULL) {
if (ISSET(VIEW_MODE) && !s->viewok)
print_view_warning();
else
s->func();
}
break;
}
}
#ifndef NANO_SMALL
else if (have_toggle) {
/* Blow away the text in the cutbuffer, since we aren't
* cutting text. */
cutbuffer_reset();
/* Toggle the flag associated with this shortcut. */
if (allow_funcs)
do_toggle(t);
}
#endif
else
/* Blow away the text in the cutbuffer, since we aren't
* cutting text. */
cutbuffer_reset();
}
return input;
}
#ifndef DISABLE_MOUSE
bool do_mouse(void)
{
int mouse_x, mouse_y;
bool retval;
retval = get_mouseinput(&mouse_x, &mouse_y, TRUE);
if (!retval) {
/* We can click in the edit window to move the cursor. */
if (wenclose(edit, mouse_y, mouse_x)) {
bool sameline;
/* Did they click on the line with the cursor? If they
* clicked on the cursor, we set the mark. */
size_t xcur;
/* The character they clicked on. */
/* Subtract out the size of topwin. Perhaps we need a
* constant somewhere? */
mouse_y -= 2;
sameline = (mouse_y == current_y);
/* Move to where the click occurred. */
for (; current_y < mouse_y && current->next != NULL; current_y++)
current = current->next;
for (; current_y > mouse_y && current->prev != NULL; current_y--)
current = current->prev;
xcur = actual_x(current->data, get_page_start(xplustabs()) +
mouse_x);
#ifndef NANO_SMALL
/* 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 && xcur == current_x) {
if (ISSET(VIEW_MODE)) {
print_view_warning();
return retval;
}
do_mark();
}
#endif
current_x = xcur;
placewewant = xplustabs();
edit_refresh();
}
}
/* FIXME: If we clicked on a location in the statusbar, the cursor
* should move to the location we clicked on. This functionality
* should be in do_statusbar_mouse() when it's written. */
return retval;
}
#endif /* !DISABLE_MOUSE */
/* The user typed kbinput_len characters. Add them to the edit
* buffer. */
void do_output(int *kbinput, size_t kbinput_len)
{
size_t i, current_len = strlen(current->data);
bool old_constupdate = ISSET(CONSTUPDATE);
bool do_refresh = FALSE;
/* Do we have to call edit_refresh(), or can we get away with
* update_line()? */
char key[
#ifdef NANO_WIDE
MB_LEN_MAX
#else
1
#endif
]; /* The current character we have. */
int key_len; /* The length of the current character. */
assert(current != NULL && current->data != NULL);
/* Turn off constant cursor position display. */
UNSET(CONSTUPDATE);
for (i = 0; i < kbinput_len; i++) {
#ifdef NANO_WIDE
/* Change the wide character to its multibyte value. If it's
* invalid, go on to the next character. */
if (!ISSET(NO_UTF8)) {
key_len = wctomb(key, kbinput[i]);
if (key_len == -1)
continue;
/* Interpret the character as a single-byte sequence. */
} else {
#endif
key_len = 1;
key[0] = (char)kbinput[i];
#ifdef NANO_WIDE
}
#endif
/* Null to newline, if needed. */
if (key[0] == '\0' && key_len == 1)
key[0] = '\n';
/* Newline to Enter, if needed. */
else if (key[0] == '\n' && key_len == 1) {
do_enter();
continue;
}
/* When a character is inserted on the current magicline, it
* means we need a new one! */
if (filebot == current)
new_magicline();
/* More dangerousness fun =) */
current->data = charealloc(current->data,
current_len + key_len + 1);
assert(current_x <= current_len);
charmove(¤t->data[current_x + key_len],
¤t->data[current_x],
current_len - current_x + key_len);
charcpy(¤t->data[current_x], key, key_len);
current_len += key_len;
/* FIXME: Should totsize be the number of single-byte characters
* or the number of multibyte characters? Assume for former for
* now. */
totsize += key_len;
set_modified();
#ifndef NANO_SMALL
/* Note that current_x has not yet been incremented. */
if (current == mark_beginbuf && current_x < mark_beginx)
mark_beginx += key_len;
#endif
{
int j;
for (j = 0; j < key_len; j++)
do_right(FALSE);
}
#ifndef DISABLE_WRAPPING
/* If we're wrapping text, we need to call edit_refresh(). */
if (!ISSET(NO_WRAP) && (key[0] != '\t' || key_len != 1)) {
bool do_refresh_save = do_refresh;
do_refresh = do_wrap(current);
/* If we needed to call edit_refresh() before this, we'll
* still need to after this. */
if (do_refresh_save)
do_refresh = TRUE;
}
#endif
#ifdef ENABLE_COLOR
/* If color syntaxes are turned on, we need to call
* edit_refresh(). */
if (ISSET(COLOR_SYNTAX))
do_refresh = TRUE;
#endif
}
/* Turn constant cursor position display back on if it was on
* before. */
if (old_constupdate)
SET(CONSTUPDATE);
if (do_refresh)
edit_refresh();
else
update_line(current, current_x);
}
int main(int argc, char **argv)
{
int optchr;
int startline = 0;
/* Line to try and start at. */
#ifndef DISABLE_WRAPJUSTIFY
bool fill_flag_used = FALSE;
/* Was the fill option used? */
#endif
#ifdef ENABLE_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[] = {
{"help", 0, 0, 'h'},
#ifdef ENABLE_MULTIBUFFER
{"multibuffer", 0, 0, 'F'},
#endif
#ifdef ENABLE_NANORC
#ifndef NANO_SMALL
{"historylog", 0, 0, 'H'},
#endif
{"ignorercfiles", 0, 0, 'I'},
#endif
#ifdef NANO_WIDE
{"noutf8", 0, 0, 'O'},
#endif
#ifndef DISABLE_JUSTIFY
{"quotestr", 1, 0, 'Q'},
#endif
#ifdef HAVE_REGEX_H
{"regexp", 0, 0, 'R'},
#endif
{"tabsize", 1, 0, 'T'},
{"version", 0, 0, 'V'},
#ifdef ENABLE_COLOR
{"syntax", 1, 0, 'Y'},
#endif
{"const", 0, 0, 'c'},
{"rebinddelete", 0, 0, 'd'},
{"nofollow", 0, 0, 'l'},
#ifndef DISABLE_MOUSE
{"mouse", 0, 0, 'm'},
#endif
#ifndef DISABLE_OPERATINGDIR
{"operatingdir", 1, 0, 'o'},
#endif
{"preserve", 0, 0, 'p'},
#ifndef DISABLE_WRAPJUSTIFY
{"fill", 1, 0, 'r'},
#endif
#ifndef DISABLE_SPELLER
{"speller", 1, 0, 's'},
#endif
{"tempfile", 0, 0, 't'},
{"view", 0, 0, 'v'},
#ifndef DISABLE_WRAPPING
{"nowrap", 0, 0, 'w'},
#endif
{"nohelp", 0, 0, 'x'},
{"suspend", 0, 0, 'z'},
#ifndef NANO_SMALL
{"smarthome", 0, 0, 'A'},
{"backup", 0, 0, 'B'},
{"backupdir", 1, 0, 'E'},
{"noconvert", 0, 0, 'N'},
{"smooth", 0, 0, 'S'},
{"restricted", 0, 0, 'Z'},
{"autoindent", 0, 0, 'i'},
{"cut", 0, 0, 'k'},
#endif
{0, 0, 0, 0}
};
#endif
setlocale(LC_ALL, "");
#ifdef ENABLE_NLS
bindtextdomain(PACKAGE, LOCALEDIR);
textdomain(PACKAGE);
#endif
#if !defined(ENABLE_NANORC) && defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING)
/* If we don't have rcfile support, we're root, and
* --disable-wrapping-as-root is used, turn wrapping off. */
if (geteuid() == NANO_ROOT_UID)
SET(NO_WRAP);
#endif
while ((optchr =
#ifdef HAVE_GETOPT_LONG
getopt_long(argc, argv, "h?ABE:FHINOQ:RST:VY:Zabcdefgijklmo:pr:s:tvwxz", long_options, NULL)
#else
getopt(argc, argv, "h?ABE:FHINOQ:RST:VY:Zabcdefgijklmo:pr:s:tvwxz")
#endif
) != -1) {
switch (optchr) {
case 'a':
case 'b':
case 'e':
case 'f':
case 'g':
case 'j':
/* Pico compatibility flags. */
break;
#ifndef NANO_SMALL
case 'A':
SET(SMART_HOME);
break;
case 'B':
SET(BACKUP_FILE);
break;
case 'E':
backup_dir = mallocstrcpy(backup_dir, optarg);
break;
#endif
#ifdef ENABLE_MULTIBUFFER
case 'F':
SET(MULTIBUFFER);
break;
#endif
#ifdef ENABLE_NANORC
#ifndef NANO_SMALL
case 'H':
SET(HISTORYLOG);
break;
#endif
case 'I':
SET(NO_RCFILE);
break;
#endif
#ifndef NANO_SMALL
case 'N':
SET(NO_CONVERT);
break;
#endif
case 'O':
SET(NO_UTF8);
break;
#ifndef DISABLE_JUSTIFY
case 'Q':
quotestr = mallocstrcpy(quotestr, optarg);
break;
#endif
#ifdef HAVE_REGEX_H
case 'R':
SET(USE_REGEXP);
break;
#endif
#ifndef NANO_SMALL
case 'S':
SET(SMOOTHSCROLL);
break;
#endif
case 'T':
if (!parse_num(optarg, &tabsize) || tabsize <= 0) {
fprintf(stderr, _("Requested tab size %s invalid"), optarg);
fprintf(stderr, "\n");
exit(1);
}
break;
case 'V':
version();
exit(0);
#ifdef ENABLE_COLOR
case 'Y':
syntaxstr = mallocstrcpy(syntaxstr, optarg);
break;
#endif
case 'Z':
SET(RESTRICTED);
break;
case 'c':
SET(CONSTUPDATE);
break;
case 'd':
SET(REBIND_DELETE);
break;
#ifndef NANO_SMALL
case 'i':
SET(AUTOINDENT);
break;
case 'k':
SET(CUT_TO_END);
break;
#endif
case 'l':
SET(NOFOLLOW_SYMLINKS);
break;
#ifndef DISABLE_MOUSE
case 'm':
SET(USE_MOUSE);
break;
#endif
#ifndef DISABLE_OPERATINGDIR
case 'o':
operating_dir = mallocstrcpy(operating_dir, optarg);
break;
#endif
case 'p':
SET(PRESERVE);
break;
#ifndef DISABLE_WRAPJUSTIFY
case 'r':
if (!parse_num(optarg, &wrap_at)) {
fprintf(stderr, _("Requested fill size %s invalid"), optarg);
fprintf(stderr, "\n");
exit(1);
}
fill_flag_used = TRUE;
break;
#endif
#ifndef DISABLE_SPELLER
case 's':
alt_speller = mallocstrcpy(alt_speller, optarg);
break;
#endif
case 't':
SET(TEMP_FILE);
break;
case 'v':
SET(VIEW_MODE);
break;
#ifndef DISABLE_WRAPPING
case 'w':
SET(NO_WRAP);
break;
#endif
case 'x':
SET(NO_HELP);
break;
case 'z':
SET(SUSPEND);
break;
default:
usage();
}
}
/* If the executable filename starts with 'r', we use restricted
* mode. */
if (*(tail(argv[0])) == 'r')
SET(RESTRICTED);
/* If we're using restricted mode, disable suspending, backups, and
* reading rcfiles, 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);
SET(NO_RCFILE);
}
/* 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. */
#ifdef ENABLE_NANORC
if (!ISSET(NO_RCFILE)) {
#ifndef DISABLE_OPERATINGDIR
char *operating_dir_cpy = operating_dir;
#endif
#ifndef DISABLE_WRAPJUSTIFY
ssize_t wrap_at_cpy = wrap_at;
#endif
#ifndef NANO_SMALL
char *backup_dir_cpy = backup_dir;
#endif
#ifndef DISABLE_JUSTIFY
char *quotestr_cpy = quotestr;
#endif
#ifndef DISABLE_SPELLER
char *alt_speller_cpy = alt_speller;
#endif
ssize_t tabsize_cpy = tabsize;
long flags_cpy = flags;
#ifndef DISABLE_OPERATINGDIR
operating_dir = NULL;
#endif
#ifndef NANO_SMALL
backup_dir = NULL;
#endif
#ifndef DISABLE_JUSTIFY
quotestr = NULL;
#endif
#ifndef DISABLE_SPELLER
alt_speller = NULL;
#endif
do_rcfile();
#ifndef DISABLE_OPERATINGDIR
if (operating_dir_cpy != NULL) {
free(operating_dir);
operating_dir = operating_dir_cpy;
}
#endif
#ifndef DISABLE_WRAPJUSTIFY
if (fill_flag_used)
wrap_at = wrap_at_cpy;
#endif
#ifndef NANO_SMALL
if (backup_dir_cpy != NULL) {
free(backup_dir);
backup_dir = backup_dir_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;
flags |= flags_cpy;
}
#if defined(DISABLE_ROOTWRAP) && !defined(DISABLE_WRAPPING)
else if (geteuid() == NANO_ROOT_UID)
SET(NO_WRAP);
#endif
#endif /* ENABLE_NANORC */
#ifndef NANO_SMALL
history_init();
#ifdef ENABLE_NANORC
if (!ISSET(NO_RCFILE) && ISSET(HISTORYLOG))
load_history();
#endif
#endif
#ifndef NANO_SMALL
/* 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 == NULL)
punct = mallocstrcpy(punct, ".?!");
if (brackets == NULL)
brackets = mallocstrcpy(brackets, "'\")}]>");
if (quotestr == NULL)
quotestr = mallocstrcpy(NULL,
#ifdef HAVE_REGEX_H
"^([ \t]*[|>:}#])+"
#else
"> "
#endif
);
#ifdef HAVE_REGEX_H
quoterc = regcomp("ereg, quotestr, REG_EXTENDED);
if (quoterc == 0) {
/* We no longer need quotestr, just quotereg. */
free(quotestr);
quotestr = NULL;
} else {
size_t size = regerror(quoterc, "ereg, NULL, 0);
quoteerr = charalloc(size);
regerror(quoterc, "ereg, 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
#if !defined(NANO_SMALL) && defined(ENABLE_NANORC)
/* If whitespace wasn't specified, set its default value. */
if (whitespace == NULL)
whitespace = mallocstrcpy(NULL, " ");
#endif
/* If tabsize wasn't specified, set its default value. */
if (tabsize == -1)
tabsize = WIDTH_OF_TAB;
/* Back up the old terminal settings so that they can be restored. */
tcgetattr(0, &oldterm);
/* Curses initialization stuff: Start curses and set up the
* terminal state. */
initscr();
terminal_init();
/* Set up the global variables and the shortcuts. */
global_init(FALSE);
shortcut_init(FALSE);
/* Set up the signal handlers. */
signal_init();
#ifdef DEBUG
fprintf(stderr, "Main: set up windows\n");
#endif
window_init();
#ifndef DISABLE_MOUSE
mouse_init();
#endif
#ifdef DEBUG
fprintf(stderr, "Main: open file\n");
#endif
/* If there's a +LINE 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] == '+') {
startline = atoi(&argv[optind][1]);
optind++;
}
#ifdef ENABLE_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, iline = 0;
for (; i < argc; i++) {
/* If there's a +LINE flag here, it is followed by at least
* one other argument, the filename it applies to. */
if (i < argc - 1 && argv[i][0] == '+' && iline == 0) {
iline = atoi(&argv[i][1]);
} else {
load_buffer(argv[i]);
if (iline > 0) {
do_gotoline(iline, FALSE);
iline = 0;
}
}
}
}
#endif
/* Read the first file on the command line into either the current
* buffer or a new buffer, depending on whether multibuffer mode is
* enabled. */
if (optind < argc)
load_buffer(argv[optind]);
/* We didn't open any files if all the command line arguments were
* invalid files like directories or if there were no command line
* arguments given. In this case, we have to load a blank buffer.
* Also, we unset view mode to allow editing. */
if (filename == NULL) {
filename = mallocstrcpy(NULL, "");
new_file();
UNSET(VIEW_MODE);
/* Add this new entry to the open_files structure if we have
* multibuffer support, or to the main filestruct if we don't. */
load_file();
}
#ifdef ENABLE_MULTIBUFFER
if (!old_multibuffer)
UNSET(MULTIBUFFER);
#endif
#ifdef DEBUG
fprintf(stderr, "Main: top and bottom win\n");
#endif
titlebar(NULL);
display_main_list();
if (startline > 0)
do_gotoline(startline, FALSE);
#ifndef NANO_SMALL
/* Return here after a SIGWINCH. */
sigsetjmp(jmpbuf, 1);
#endif
edit_refresh();
while (TRUE) {
bool meta_key;
/* Whether we got a meta key sequence. */
bool func_key;
/* Whether we got a function key. */
bool s_or_t;
/* Whether we got a shortcut or toggle. */
/* Make sure the cursor is in the edit window. */
reset_cursor();
/* If constant cursor position display is on, display the cursor
* position. */
if (ISSET(CONSTUPDATE))
do_cursorpos(TRUE);
#if !defined(DISABLE_BROWSER) || !defined(DISABLE_HELP) || !defined(DISABLE_MOUSE)
currshortcut = main_list;
#endif
/* Read in and interpret characters. */
do_input(&meta_key, &func_key, &s_or_t, TRUE);
}
assert(FALSE);
}