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/* Cursor motion calculation definitions for GNU Emacs
Copyright (C) 1985, 1989, 2002, 2003, 2004,
2005 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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.
GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA. */
/* Holds the minimum and maximum costs for the parametrized capabilities. */
struct parmcap
{
int mincost, maxcost;
};
/* This structure holds everything needed to do cursor motion except the pad
character (PC) and the output speed of the terminal (ospeed), which
termcap wants in global variables. */
struct cm
{
/* Cursor position. -1 in *both* variables means the cursor
position is unknown, in order to force absolute cursor motion. */
int cm_curY; /* Current row */
int cm_curX; /* Current column */
/* Capabilities from termcap */
char *cm_up; /* up (up) */
char *cm_down; /* down (do) */
char *cm_left; /* left (le) */
char *cm_right; /* right (nd) */
char *cm_home; /* home (ho) */
char *cm_cr; /* carriage return (cr) */
char *cm_ll; /* last line (ll) */
char *cm_tab; /* tab (ta) */
char *cm_backtab; /* backtab (bt) */
char *cm_abs; /* absolute (cm) */
char *cm_habs; /* horizontal absolute (ch) */
char *cm_vabs; /* vertical absolute (cv) */
#if 0
char *cm_ds; /* "don't send" string (ds) */
#endif
char *cm_multiup; /* multiple up (UP) */
char *cm_multidown; /* multiple down (DO) */
char *cm_multileft; /* multiple left (LE) */
char *cm_multiright; /* multiple right (RI) */
int cm_cols; /* number of cols on screen (co) */
int cm_rows; /* number of rows on screen (li) */
int cm_tabwidth; /* tab width (it) */
unsigned int cm_autowrap:1; /* autowrap flag (am) */
unsigned int cm_magicwrap:1; /* VT-100: cursor stays in last col but
will cm_wrap if next char is
printing (xn) */
unsigned int cm_usetabs:1; /* if set, use tabs */
unsigned int cm_losewrap:1; /* if reach right margin, forget cursor
location */
unsigned int cm_autolf:1; /* \r performs a \r\n (rn) */
/* Parametrized capabilities. This needs to be a struct since
the costs are accessed through pointers. */
#if 0
struct parmcap cc_abs; /* absolute (cm) */
struct parmcap cc_habs; /* horizontal absolute (ch) */
struct parmcap cc_vabs; /* vertical absolute (cv) */
struct parmcap cc_multiup; /* multiple up (UP) */
struct parmcap cc_multidown; /* multiple down (DO) */
struct parmcap cc_multileft; /* multiple left (LE) */
struct parmcap cc_multiright; /* multiple right (RI) */
#endif
/* Costs for the non-parametrized capabilities */
int cc_up; /* cost for up */
int cc_down; /* etc. */
int cc_left;
int cc_right;
int cc_home;
int cc_cr;
int cc_ll;
int cc_tab;
int cc_backtab;
/* These are temporary, until the code is installed to use the
struct parmcap fields above. */
int cc_abs;
int cc_habs;
int cc_vabs;
};
extern struct cm Wcm; /* Terminal capabilities */
extern char PC; /* Pad character */
/* Shorthand */
#ifndef NoCMShortHand
#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 Tab Wcm.cm_tab
#define BackTab Wcm.cm_backtab
#define TabWidth Wcm.cm_tabwidth
#define CR Wcm.cm_cr
#define Home Wcm.cm_home
#define LastLine Wcm.cm_ll
#define AbsPosition Wcm.cm_abs
#define ColPosition Wcm.cm_habs
#define RowPosition Wcm.cm_vabs
#define MultiUp Wcm.cm_multiup
#define MultiDown Wcm.cm_multidown
#define MultiLeft Wcm.cm_multileft
#define MultiRight Wcm.cm_multiright
#define AutoWrap Wcm.cm_autowrap
#define MagicWrap Wcm.cm_magicwrap
#define UseTabs Wcm.cm_usetabs
#define FrameRows Wcm.cm_rows
#define FrameCols Wcm.cm_cols
#define UpCost Wcm.cc_up
#define DownCost Wcm.cc_down
#define LeftCost Wcm.cc_left
#define RightCost Wcm.cc_right
#define HomeCost Wcm.cc_home
#define CRCost Wcm.cc_cr
#define LastLineCost Wcm.cc_ll
#define TabCost Wcm.cc_tab
#define BackTabCost Wcm.cc_backtab
#define AbsPositionCost Wcm.cc_abs
#define ColPositionCost Wcm.cc_habs
#define RowPositionCost Wcm.cc_vabs
#define MultiUpCost Wcm.cc_multiup
#define MultiDownCost Wcm.cc_multidown
#define MultiLeftCost Wcm.cc_multileft
#define MultiRightCost Wcm.cc_multiright
#endif
#define cmat(row,col) (curY = (row), curX = (col))
#define cmplus(n) \
{ \
if ((curX += (n)) >= FrameCols && !MagicWrap) \
{ \
if (Wcm.cm_losewrap) losecursor (); \
else if (AutoWrap) curX = 0, curY++; \
else curX--; \
} \
}
#define losecursor() (curX = -1, curY = -1)
extern int cost;
extern int evalcost ();
extern void cmcheckmagic ();
extern int cmputc ();
extern void cmcostinit ();
extern void cmgoto ();
extern void Wcm_clear ();
extern int Wcm_init ();
/* arch-tag: acc1535a-7136-49d6-b22d-9bc85702251b
(do not change this comment) */
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