nano.h

/* $Id$ */
/**************************************************************************
 *   nano.h                                                               *
 *                                                                        *
 *   Copyright (C) 1999-2005 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., 51 Franklin St, Fifth Floor, Boston, MA            *
 *   02110-1301, USA.                                                     *
 *                                                                        *
 **************************************************************************/

#ifndef NANO_H
#define NANO_H 1

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifdef __TANDEM
/* Tandem NonStop Kernel. */
#include <floss.h>
#define NANO_ROOT_UID 65535
#else
#define NANO_ROOT_UID 0
#endif

#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif

/* Macros for the flags long. */
#define SET(bit) flags |= bit
#define UNSET(bit) flags &= ~bit
#define ISSET(bit) ((flags & bit) != 0)
#define TOGGLE(bit) flags ^= bit

/* Macros for character allocation, etc. */
#define charalloc(howmuch) (char *)nmalloc((howmuch) * sizeof(char))
#define charealloc(ptr, howmuch) (char *)nrealloc(ptr, (howmuch) * sizeof(char))
#define charmove(dest, src, n) memmove(dest, src, (n) * sizeof(char))
#define charcpy(dest, src, n) memcpy(dest, src, (n) * sizeof(char))
#define charset(dest, src, n) memset(dest, src, (n) * sizeof(char))

/* Other macros. */
#ifdef BROKEN_REGEXEC
#undef regexec
#define regexec(preg, string, nmatch, pmatch, eflags) safe_regexec(preg, string, nmatch, pmatch, eflags)
#endif

/* Set a default value for PATH_MAX if there isn't one. */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif

#ifdef USE_SLANG
/* Slang support enabled. */
#include <slcurses.h>
/* Slang curses emulation brain damage, part 2: Slang doesn't define the
 * curses equivalents of the Insert or Delete keys. */
#define KEY_DC SL_KEY_DELETE
#define KEY_IC SL_KEY_IC
#elif defined(HAVE_NCURSES_H)
#include <ncurses.h>
#else /* Uh oh. */
#include <curses.h>
#endif /* CURSES_H */

#ifdef ENABLE_NLS
#ifdef HAVE_LIBINTL_H
#include <libintl.h>
#endif
#define _(string) gettext(string)
#define P_(singular, plural, number) ngettext(singular, plural, number)
#else
#define _(string) (string)
#define P_(singular, plural, number) (number == 1 ? singular : plural)
#endif
#define gettext_noop(string) (string)
#define N_(string) gettext_noop(string)
	/* Mark a string that will be sent to gettext() later. */

#include <stddef.h>
#include <sys/types.h>
#include <sys/stat.h>

/* If no snprintf() or vsnprintf(), use the versions from glib. */
#if !defined(HAVE_SNPRINTF) || !defined(HAVE_VSNPRINTF)
#include <glib.h>
#ifndef HAVE_SNPRINTF
#define snprintf g_snprintf
#endif
#ifndef HAVE_VSNPRINTF
#define vsnprintf g_vsnprintf
#endif
#endif

/* If no isblank(), iswblank(), strcasecmp(), strncasecmp(),
 * strcasestr(), strnlen(), getdelim(), or getline(), use the versions
 * we have. */
#ifndef HAVE_ISBLANK
#define isblank nisblank
#endif
#ifndef HAVE_ISWBLANK
#define iswblank niswblank
#endif
#ifndef HAVE_STRCASECMP
#define strcasecmp nstrcasecmp
#endif
#ifndef HAVE_STRNCASECMP
#define strncasecmp nstrncasecmp
#endif
#ifndef HAVE_STRCASESTR
#define strcasestr nstrcasestr
#endif
#ifndef HAVE_STRNLEN
#define strnlen nstrnlen
#endif
#ifndef HAVE_GETDELIM
#define getdelim ngetdelim
#endif
#ifndef HAVE_GETLINE
#define getline ngetline
#endif

#define VERMSG "GNU nano " VERSION

/* If we aren't using ncurses, turn the mouse support off, as it's
 * ncurses-specific. */
#ifndef NCURSES_MOUSE_VERSION
#define DISABLE_MOUSE 1
#endif

#if defined(DISABLE_WRAPPING) && defined(DISABLE_JUSTIFY)
#define DISABLE_WRAPJUSTIFY 1
#endif

/* Enumeration types. */
typedef enum {
    NIX_FILE, DOS_FILE, MAC_FILE
} file_format;

typedef enum {
    UP, DOWN
} updown;

typedef enum {
    TOP, CENTER, NONE
} topmidnone;

/* Structure types. */
typedef struct filestruct {
    char *data;
    struct filestruct *next;	/* Next node. */
    struct filestruct *prev;	/* Previous node. */
    int lineno;			/* The line number. */
} filestruct;

#ifdef ENABLE_MULTIBUFFER
typedef struct openfilestruct {
    char *filename;
#ifndef NANO_SMALL
    struct stat originalfilestat;
#endif
    struct openfilestruct *next;
				/* Next node. */
    struct openfilestruct *prev;
				/* Previous node. */
    filestruct *fileage;	/* Current file. */
    filestruct *filebot;	/* Current file's last line. */
    filestruct *edittop;	/* Current top of edit window. */
    filestruct *current;	/* Current file's line. */
#ifndef NANO_SMALL
    filestruct *mark_beginbuf;
				/* Current file's beginning marked
				 * line. */
    size_t mark_beginx;		/* Current file's beginning marked
				 * line's x-coordinate position. */
#endif
    size_t current_x;		/* Current file's x-coordinate
				 * position. */
    size_t placewewant;		/* Current file's place we want. */
    int totlines;		/* Current file's total number of
				 * lines. */
    size_t totsize;		/* Current file's total size. */
    unsigned long flags;	/* Current file's flags: modification
				 * status (and marking status, if
				 * available). */
    file_format fmt;		/* Current file's format. */
} openfilestruct;
#endif

typedef struct partition {
    filestruct *fileage;
    filestruct *top_prev;
    char *top_data;
    filestruct *filebot;
    filestruct *bot_next;
    char *bot_data;
} partition;

typedef struct shortcut {
    /* Key values that aren't used should be set to NANO_NO_KEY. */
    int ctrlval;	/* Special sentinel key or control key we want
			 * bound. */
    int metaval;	/* Meta key we want bound. */
    int funcval;	/* Function key we want bound. */
    int miscval;	/* Other Meta key we want bound. */
    bool viewok;	/* Is this function legal in view mode? */
    void (*func)(void);	/* Function to call when we catch this key. */
    const char *desc;	/* Description, e.g. "Page Up". */
#ifndef DISABLE_HELP
    const char *help;	/* Help file entry text. */
#endif
    struct shortcut *next;
} shortcut;

#ifndef NANO_SMALL
typedef struct toggle {
   int val;		/* Sequence to toggle the key.  Should only need
			 * one. */
   const char *desc;	/* Description for when toggle is, uh, toggled,
			 * e.g. "Cut to end"; we'll append Enabled or
			 * Disabled. */
   long flag;		/* What flag actually gets toggled. */
   struct toggle *next;
} toggle;
#endif

#ifdef ENABLE_NANORC
typedef struct rcoption {
   const char *name;
   long flag;
} rcoption;
#endif

#ifdef ENABLE_COLOR
typedef struct colortype {
    int fg;			/* Foreground color. */
    int bg;			/* Background color. */
    int bright;			/* Is this color A_BOLD? */
    int pairnum;		/* Color pair number used for this
				 * foreground/background. */
    regex_t start;		/* Start (or all) of the regex
				 * string. */
    regex_t *end;		/* End (if any) of the regex string. */
    struct colortype *next;
} colortype;

typedef struct exttype {
    regex_t val;		/* The extensions that match this
				 * syntax. */
    struct exttype *next;
} exttype;

typedef struct syntaxtype {
    char *desc;			/* Name of this syntax type. */
    exttype *extensions;	/* List of extensions that this syntax
				 * applies to. */
    colortype *color;		/* Color struct for this syntax. */
    struct syntaxtype *next;
} syntaxtype;
#endif

/* Bitwise flags so that we can save space (or, more correctly, not
 * waste it). */
#define MODIFIED		(1<<0)
#define CASE_SENSITIVE		(1<<1)
#define MARK_ISSET		(1<<2)
#define CONSTUPDATE		(1<<3)
#define NO_HELP			(1<<4)
#define NOFOLLOW_SYMLINKS	(1<<5)
#define SUSPEND			(1<<6)
#define NO_WRAP			(1<<7)
#define AUTOINDENT		(1<<8)
#define VIEW_MODE		(1<<9)
#define USE_MOUSE		(1<<10)
#define USE_REGEXP		(1<<11)
#define TEMP_FILE		(1<<12)
#define CUT_TO_END		(1<<13)
#define REVERSE_SEARCH		(1<<14)
#define MULTIBUFFER		(1<<15)
#define SMOOTHSCROLL		(1<<16)
#define DISABLE_CURPOS		(1<<17)	/* Damn, we still need it. */
#define REBIND_DELETE		(1<<18)
#define NO_CONVERT		(1<<19)
#define BACKUP_FILE		(1<<20)
#define NO_RCFILE		(1<<21)
#define NO_COLOR_SYNTAX		(1<<22)
#define PRESERVE		(1<<23)
#define HISTORYLOG		(1<<24)
#define RESTRICTED		(1<<25)
#define SMART_HOME		(1<<26)
#define WHITESPACE_DISPLAY	(1<<27)
#define MORE_SPACE		(1<<28)
#define TABS_TO_SPACES		(1<<29)
#define NO_UTF8			(1<<30)

/* Control key sequences.  Changing these would be very, very bad. */
#define NANO_CONTROL_SPACE 0
#define NANO_CONTROL_A 1
#define NANO_CONTROL_B 2
#define NANO_CONTROL_C 3
#define NANO_CONTROL_D 4
#define NANO_CONTROL_E 5
#define NANO_CONTROL_F 6
#define NANO_CONTROL_G 7
#define NANO_CONTROL_H 8
#define NANO_CONTROL_I 9
#define NANO_CONTROL_J 10
#define NANO_CONTROL_K 11
#define NANO_CONTROL_L 12
#define NANO_CONTROL_M 13
#define NANO_CONTROL_N 14
#define NANO_CONTROL_O 15
#define NANO_CONTROL_P 16
#define NANO_CONTROL_Q 17
#define NANO_CONTROL_R 18
#define NANO_CONTROL_S 19
#define NANO_CONTROL_T 20
#define NANO_CONTROL_U 21
#define NANO_CONTROL_V 22
#define NANO_CONTROL_W 23
#define NANO_CONTROL_X 24
#define NANO_CONTROL_Y 25
#define NANO_CONTROL_Z 26
#define NANO_CONTROL_3 27
#define NANO_CONTROL_4 28
#define NANO_CONTROL_5 29
#define NANO_CONTROL_6 30
#define NANO_CONTROL_7 31
#define NANO_CONTROL_8 127

#define NANO_ALT_9 '9'
#define NANO_ALT_0 '0'
#define NANO_ALT_A 'a'
#define NANO_ALT_B 'b'
#define NANO_ALT_C 'c'
#define NANO_ALT_D 'd'
#define NANO_ALT_E 'e'
#define NANO_ALT_F 'f'
#define NANO_ALT_G 'g'
#define NANO_ALT_H 'h'
#define NANO_ALT_I 'i'
#define NANO_ALT_J 'j'
#define NANO_ALT_K 'k'
#define NANO_ALT_L 'l'
#define NANO_ALT_M 'm'
#define NANO_ALT_N 'n'
#define NANO_ALT_O 'o'
#define NANO_ALT_P 'p'
#define NANO_ALT_Q 'q'
#define NANO_ALT_R 'r'
#define NANO_ALT_S 's'
#define NANO_ALT_T 't'
#define NANO_ALT_U 'u'
#define NANO_ALT_V 'v'
#define NANO_ALT_W 'w'
#define NANO_ALT_X 'x'
#define NANO_ALT_Y 'y'
#define NANO_ALT_Z 'z'
#define NANO_ALT_PERIOD '.'
#define NANO_ALT_COMMA ','
#define NANO_ALT_LPAREN '('
#define NANO_ALT_RPAREN ')'
#define NANO_ALT_LCARAT '<'
#define NANO_ALT_RCARAT '>'
#define NANO_ALT_RBRACKET ']'
#define NANO_ALT_SPACE ' '

/* Some semi-changeable keybindings; don't play with these unless you're
 * sure you know what you're doing.  Assume ERR is defined as -1. */

/* No key at all. */
#define NANO_NO_KEY		-2

/* Normal keys. */
#define NANO_XON_KEY		NANO_CONTROL_Q
#define NANO_XOFF_KEY		NANO_CONTROL_S
#define NANO_CANCEL_KEY		NANO_CONTROL_C
#define NANO_EXIT_KEY		NANO_CONTROL_X
#define NANO_EXIT_FKEY		KEY_F(2)
#define NANO_INSERTFILE_KEY	NANO_CONTROL_R
#define NANO_INSERTFILE_FKEY	KEY_F(5)
#define NANO_TOOTHERINSERT_KEY	NANO_CONTROL_X
#define NANO_WRITEOUT_KEY	NANO_CONTROL_O
#define NANO_WRITEOUT_FKEY	KEY_F(3)
#define NANO_GOTOLINE_KEY	NANO_CONTROL_7
#define NANO_GOTOLINE_FKEY	KEY_F(13)
#define NANO_GOTOLINE_ALTKEY	NANO_ALT_G
#define NANO_TOGOTOLINE_KEY	NANO_CONTROL_T
#define NANO_HELP_KEY		NANO_CONTROL_G
#define NANO_HELP_FKEY		KEY_F(1)
#define NANO_WHEREIS_KEY	NANO_CONTROL_W
#define NANO_WHEREIS_FKEY	KEY_F(6)
#define NANO_WHEREIS_NEXT_KEY	NANO_ALT_W
#define NANO_WHEREIS_NEXT_FKEY	KEY_F(16)
#define NANO_TOOTHERWHEREIS_KEY	NANO_CONTROL_T
#define NANO_REGEXP_KEY		NANO_ALT_R
#define NANO_REPLACE_KEY	NANO_CONTROL_4
#define NANO_REPLACE_FKEY	KEY_F(14)
#define NANO_ALT_REPLACE_KEY	NANO_ALT_R
#define NANO_TOOTHERSEARCH_KEY	NANO_CONTROL_R
#define NANO_PREVPAGE_KEY	NANO_CONTROL_Y
#define NANO_PREVPAGE_FKEY	KEY_F(7)
#define NANO_NEXTPAGE_KEY	NANO_CONTROL_V
#define NANO_NEXTPAGE_FKEY	KEY_F(8)
#define NANO_CUT_KEY		NANO_CONTROL_K
#define NANO_CUT_FKEY		KEY_F(9)
#define NANO_UNCUT_KEY		NANO_CONTROL_U
#define NANO_UNCUT_FKEY		KEY_F(10)
#define NANO_CURSORPOS_KEY	NANO_CONTROL_C
#define NANO_CURSORPOS_FKEY	KEY_F(11)
#define NANO_SPELL_KEY		NANO_CONTROL_T
#define NANO_SPELL_FKEY		KEY_F(12)
#define NANO_FIRSTLINE_KEY	NANO_PREVPAGE_KEY
#define NANO_FIRSTLINE_FKEY	NANO_PREVPAGE_FKEY
#define NANO_LASTLINE_KEY	NANO_NEXTPAGE_KEY
#define NANO_LASTLINE_FKEY	NANO_NEXTPAGE_FKEY
#define NANO_REFRESH_KEY	NANO_CONTROL_L
#define NANO_JUSTIFY_KEY	NANO_CONTROL_J
#define NANO_JUSTIFY_FKEY	KEY_F(4)
#define NANO_UNJUSTIFY_KEY	NANO_UNCUT_KEY	/* Same key as uncut. */
#define NANO_UNJUSTIFY_FKEY	NANO_UNCUT_FKEY	/* Same key as uncut. */
#define NANO_PREVLINE_KEY	NANO_CONTROL_P
#define NANO_NEXTLINE_KEY	NANO_CONTROL_N
#define NANO_FORWARD_KEY	NANO_CONTROL_F
#define NANO_BACK_KEY		NANO_CONTROL_B
#define NANO_MARK_KEY		NANO_CONTROL_6
#define NANO_MARK_ALTKEY	NANO_ALT_A
#define NANO_MARK_FKEY		KEY_F(15)
#define NANO_HOME_KEY		NANO_CONTROL_A
#define NANO_END_KEY		NANO_CONTROL_E
#define NANO_DELETE_KEY		NANO_CONTROL_D
#define NANO_BACKSPACE_KEY	NANO_CONTROL_H
#define NANO_TAB_KEY		NANO_CONTROL_I
#define NANO_SUSPEND_KEY	NANO_CONTROL_Z
#define NANO_ENTER_KEY		NANO_CONTROL_M
#define NANO_TOFILES_KEY	NANO_CONTROL_T
#define NANO_APPEND_KEY		NANO_ALT_A
#define NANO_PREPEND_KEY	NANO_ALT_P
#define NANO_OPENPREV_KEY	NANO_ALT_LCARAT
#define NANO_OPENNEXT_KEY	NANO_ALT_RCARAT
#define NANO_OPENPREV_ALTKEY	NANO_ALT_COMMA
#define NANO_OPENNEXT_ALTKEY	NANO_ALT_PERIOD
#define NANO_BRACKET_KEY	NANO_ALT_RBRACKET
#define NANO_NEXTWORD_KEY	NANO_CONTROL_SPACE
#define NANO_PREVWORD_KEY	NANO_ALT_SPACE
#define NANO_WORDCOUNT_KEY	NANO_ALT_D
#define NANO_CUTTILLEND_KEY	NANO_CONTROL_X
#define NANO_CUTTILLEND_ALTKEY	NANO_ALT_T
#define NANO_PARABEGIN_KEY	NANO_CONTROL_W
#define NANO_PARABEGIN_ALTKEY1	NANO_ALT_LPAREN
#define NANO_PARABEGIN_ALTKEY2	NANO_ALT_9
#define NANO_PARAEND_KEY	NANO_CONTROL_O
#define NANO_PARAEND_ALTKEY1	NANO_ALT_RPAREN
#define NANO_PARAEND_ALTKEY2	NANO_ALT_0
#define NANO_FULLJUSTIFY_KEY	NANO_CONTROL_U
#define NANO_FULLJUSTIFY_ALTKEY	NANO_ALT_J
#define NANO_VERBATIM_KEY	NANO_ALT_V

#ifndef NANO_SMALL
/* Toggles do not exist with NANO_SMALL. */
#define TOGGLE_CONST_KEY	NANO_ALT_C
#define TOGGLE_AUTOINDENT_KEY	NANO_ALT_I
#define TOGGLE_SUSPEND_KEY	NANO_ALT_Z
#define TOGGLE_NOHELP_KEY	NANO_ALT_X
#define TOGGLE_MOUSE_KEY	NANO_ALT_M
#define TOGGLE_CUTTOEND_KEY	NANO_ALT_K
#define TOGGLE_WRAP_KEY		NANO_ALT_L
#define TOGGLE_BACKWARDS_KEY	NANO_ALT_B
#define TOGGLE_CASE_KEY		NANO_ALT_C
#define TOGGLE_MULTIBUFFER_KEY	NANO_ALT_F
#define TOGGLE_DOS_KEY		NANO_ALT_D
#define TOGGLE_MAC_KEY		NANO_ALT_M
#define TOGGLE_SMOOTH_KEY	NANO_ALT_S
#define TOGGLE_NOCONVERT_KEY	NANO_ALT_N
#define TOGGLE_BACKUP_KEY	NANO_ALT_B
#define TOGGLE_SYNTAX_KEY	NANO_ALT_Y
#define TOGGLE_SMARTHOME_KEY	NANO_ALT_H
#define TOGGLE_WHITESPACE_KEY	NANO_ALT_P
#define TOGGLE_MORESPACE_KEY	NANO_ALT_O
#define TOGGLE_TABSTOSPACES_KEY	NANO_ALT_E
#endif /* !NANO_SMALL */

#define MAIN_VISIBLE 12

#define VIEW TRUE
#define NOVIEW FALSE

/* Minimum editor window rows required for nano to work correctly. */
#define MIN_EDITOR_ROWS 1

/* Default number of characters from end-of-line where text wrapping
 * occurs. */
#define CHARS_FROM_EOL 8

/* Default width of a tab. */
#define WIDTH_OF_TAB 8

/* Maximum number of search/replace history strings saved, not counting
 * the blank lines at their ends. */
#define MAX_SEARCH_HISTORY 100

/* Maximum number of bytes we read from a file at one time. */
#define MAX_BUF_SIZE 128

#endif /* !NANO_H */