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Diffstat (limited to 'src/cm.h')
| -rw-r--r-- | src/cm.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/src/cm.h b/src/cm.h new file mode 100644 index 00000000000..eef86b93be4 --- /dev/null +++ b/src/cm.h @@ -0,0 +1,169 @@ +/* Cursor motion calculation definitions for GNU Emacs + Copyright (C) 1985, 1989 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, 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 */ +extern short ospeed; /* Output speed (from sg_ospeed) */ + +/* 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 ScreenRows Wcm.cm_rows +#define ScreenCols 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)) >= ScreenCols && !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 cmputc (); +extern int cmcostinit (); +extern int cmgoto (); +extern int Wcm_clear (); +extern int Wcm_init (); |