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/* Optimal cursor motion definitions.
Copyright (C) 1985 Free Software Foundation, Inc.
Based primarily on public domain code written by Chris Torek
Originally part of GNU Emacs.
Vastly edited and modified for use within ne.
Copyright (C) 1993 Sebastiano Vigna
This file is part of ne, the nice editor.
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.
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding! */
/* This structure holds everything needed to do cursor motion. */
extern struct cm {
/* Cursor position */
int cm_curY, /* current row */
cm_curX; /* current column */
/* -1 in either one means position unknown */
/* Capabilities from terminfo */
char *cm_up, /* up (up) */
*cm_down, /* down (do) */
*cm_left, /* left (bs) */
*cm_right, /* right (nd) */
*cm_home, /* home (ho) */
*cm_cr, /* carriage return (cr) */
*cm_ll, /* last line (ll) */
*cm_abs, /* absolute (cm) */
*cm_habs, /* horizontal absolute (ch) */
*cm_vabs, /* vertical absolute (cv) */
*cm_ds; /* "don't send" string (ds) */
int cm_cols, /* Number of cols on screen (co) */
cm_rows; /* Number of rows on screen (li) */
unsigned int
cm_autowrap:1, /* autowrap flag (am) */
cm_magicwrap:1, /* vt100s: cursor stays in last col but
will wrap if next char is printing (xn) */
cm_autolf:1, /* \r performs a \r\n (rn) */
cm_losewrap:1; /* if reach right margin, forget cursor location */
/* Costs */
int cc_up, /* cost for up */
cc_down, /* etc */
cc_left,
cc_right,
cc_home,
cc_cr,
cc_ll,
cc_abs, /* abs costs are actually min costs */
cc_habs,
cc_vabs;
} Wcm;
/* Shorthands */
#define curY Wcm.cm_curY
#define curX Wcm.cm_curX
#define Up Wcm.cm_up
#define Down Wcm.cm_down
#define Left Wcm.cm_left
#define Right Wcm.cm_right
#define Home Wcm.cm_home
#define CR Wcm.cm_cr
#define LastLine Wcm.cm_ll
#define DontSend Wcm.cm_ds
#define AbsPosition Wcm.cm_abs
#define ColPosition Wcm.cm_habs
#define RowPosition Wcm.cm_vabs
#define AutoWrap Wcm.cm_autowrap
#define MagicWrap Wcm.cm_magicwrap
#define AutoLF Wcm.cm_autolf
#define ScreenRows Wcm.cm_rows
#define ScreenCols Wcm.cm_cols
#define cmat(row,col) (curY = (row), curX = (col))
#define cmplus(n) {if ((curX += (n)) >= ScreenCols && !MagicWrap)\
{if (Wcm.cm_losewrap) curY = -1; \
else if (AutoWrap) curX = 0, curY++; else curX--;}}
extern int cmputc(int);
#include "debug.h"
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.