| 1 | /* Cursor motion calculation definitions for GNU Emacs |
| 2 | Copyright (C) 1985, 1989 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GNU Emacs. |
| 5 | |
| 6 | GNU Emacs is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2, or (at your option) |
| 9 | any later version. |
| 10 | |
| 11 | GNU Emacs is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with GNU Emacs; see the file COPYING. If not, write to |
| 18 | the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 19 | Boston, MA 02111-1307, USA. */ |
| 20 | |
| 21 | /* Holds the minimum and maximum costs for the parametrized capabilities. */ |
| 22 | struct parmcap |
| 23 | { |
| 24 | int mincost, maxcost; |
| 25 | }; |
| 26 | |
| 27 | /* This structure holds everything needed to do cursor motion except the pad |
| 28 | character (PC) and the output speed of the terminal (ospeed), which |
| 29 | termcap wants in global variables. */ |
| 30 | |
| 31 | struct cm |
| 32 | { |
| 33 | /* Cursor position. -1 in *both* variables means the cursor |
| 34 | position is unknown, in order to force absolute cursor motion. */ |
| 35 | |
| 36 | int cm_curY; /* Current row */ |
| 37 | int cm_curX; /* Current column */ |
| 38 | |
| 39 | /* Capabilities from termcap */ |
| 40 | char *cm_up; /* up (up) */ |
| 41 | char *cm_down; /* down (do) */ |
| 42 | char *cm_left; /* left (le) */ |
| 43 | char *cm_right; /* right (nd) */ |
| 44 | char *cm_home; /* home (ho) */ |
| 45 | char *cm_cr; /* carriage return (cr) */ |
| 46 | char *cm_ll; /* last line (ll) */ |
| 47 | char *cm_tab; /* tab (ta) */ |
| 48 | char *cm_backtab; /* backtab (bt) */ |
| 49 | char *cm_abs; /* absolute (cm) */ |
| 50 | char *cm_habs; /* horizontal absolute (ch) */ |
| 51 | char *cm_vabs; /* vertical absolute (cv) */ |
| 52 | #if 0 |
| 53 | char *cm_ds; /* "don't send" string (ds) */ |
| 54 | #endif |
| 55 | char *cm_multiup; /* multiple up (UP) */ |
| 56 | char *cm_multidown; /* multiple down (DO) */ |
| 57 | char *cm_multileft; /* multiple left (LE) */ |
| 58 | char *cm_multiright; /* multiple right (RI) */ |
| 59 | int cm_cols; /* number of cols on screen (co) */ |
| 60 | int cm_rows; /* number of rows on screen (li) */ |
| 61 | int cm_tabwidth; /* tab width (it) */ |
| 62 | unsigned int cm_autowrap:1; /* autowrap flag (am) */ |
| 63 | unsigned int cm_magicwrap:1; /* VT-100: cursor stays in last col but |
| 64 | will cm_wrap if next char is |
| 65 | printing (xn) */ |
| 66 | unsigned int cm_usetabs:1; /* if set, use tabs */ |
| 67 | unsigned int cm_losewrap:1; /* if reach right margin, forget cursor |
| 68 | location */ |
| 69 | unsigned int cm_autolf:1; /* \r performs a \r\n (rn) */ |
| 70 | |
| 71 | /* Parametrized capabilities. This needs to be a struct since |
| 72 | the costs are accessed through pointers. */ |
| 73 | |
| 74 | #if 0 |
| 75 | struct parmcap cc_abs; /* absolute (cm) */ |
| 76 | struct parmcap cc_habs; /* horizontal absolute (ch) */ |
| 77 | struct parmcap cc_vabs; /* vertical absolute (cv) */ |
| 78 | struct parmcap cc_multiup; /* multiple up (UP) */ |
| 79 | struct parmcap cc_multidown; /* multiple down (DO) */ |
| 80 | struct parmcap cc_multileft; /* multiple left (LE) */ |
| 81 | struct parmcap cc_multiright; /* multiple right (RI) */ |
| 82 | #endif |
| 83 | |
| 84 | /* Costs for the non-parametrized capabilities */ |
| 85 | int cc_up; /* cost for up */ |
| 86 | int cc_down; /* etc. */ |
| 87 | int cc_left; |
| 88 | int cc_right; |
| 89 | int cc_home; |
| 90 | int cc_cr; |
| 91 | int cc_ll; |
| 92 | int cc_tab; |
| 93 | int cc_backtab; |
| 94 | /* These are temporary, until the code is installed to use the |
| 95 | struct parmcap fields above. */ |
| 96 | int cc_abs; |
| 97 | int cc_habs; |
| 98 | int cc_vabs; |
| 99 | }; |
| 100 | |
| 101 | extern struct cm Wcm; /* Terminal capabilities */ |
| 102 | extern char PC; /* Pad character */ |
| 103 | |
| 104 | #if defined (HAVE_LIBNCURSES) && ! defined (NCURSES_OSPEED_T) |
| 105 | extern short ospeed; |
| 106 | #else |
| 107 | #if defined (HAVE_TERMIOS_H) && defined (LINUX) |
| 108 | #include <termios.h> |
| 109 | /* HJL's version of libc is said to need this on the Alpha. |
| 110 | On the other hand, DEC OSF1 on the Alpha needs ospeed to be a short. */ |
| 111 | extern speed_t ospeed; |
| 112 | #else |
| 113 | extern short ospeed; /* Output speed (from sg_ospeed) */ |
| 114 | #endif |
| 115 | #endif |
| 116 | |
| 117 | /* Shorthand */ |
| 118 | #ifndef NoCMShortHand |
| 119 | #define curY Wcm.cm_curY |
| 120 | #define curX Wcm.cm_curX |
| 121 | #define Up Wcm.cm_up |
| 122 | #define Down Wcm.cm_down |
| 123 | #define Left Wcm.cm_left |
| 124 | #define Right Wcm.cm_right |
| 125 | #define Tab Wcm.cm_tab |
| 126 | #define BackTab Wcm.cm_backtab |
| 127 | #define TabWidth Wcm.cm_tabwidth |
| 128 | #define CR Wcm.cm_cr |
| 129 | #define Home Wcm.cm_home |
| 130 | #define LastLine Wcm.cm_ll |
| 131 | #define AbsPosition Wcm.cm_abs |
| 132 | #define ColPosition Wcm.cm_habs |
| 133 | #define RowPosition Wcm.cm_vabs |
| 134 | #define MultiUp Wcm.cm_multiup |
| 135 | #define MultiDown Wcm.cm_multidown |
| 136 | #define MultiLeft Wcm.cm_multileft |
| 137 | #define MultiRight Wcm.cm_multiright |
| 138 | #define AutoWrap Wcm.cm_autowrap |
| 139 | #define MagicWrap Wcm.cm_magicwrap |
| 140 | #define UseTabs Wcm.cm_usetabs |
| 141 | #define FrameRows Wcm.cm_rows |
| 142 | #define FrameCols Wcm.cm_cols |
| 143 | |
| 144 | #define UpCost Wcm.cc_up |
| 145 | #define DownCost Wcm.cc_down |
| 146 | #define LeftCost Wcm.cc_left |
| 147 | #define RightCost Wcm.cc_right |
| 148 | #define HomeCost Wcm.cc_home |
| 149 | #define CRCost Wcm.cc_cr |
| 150 | #define LastLineCost Wcm.cc_ll |
| 151 | #define TabCost Wcm.cc_tab |
| 152 | #define BackTabCost Wcm.cc_backtab |
| 153 | #define AbsPositionCost Wcm.cc_abs |
| 154 | #define ColPositionCost Wcm.cc_habs |
| 155 | #define RowPositionCost Wcm.cc_vabs |
| 156 | #define MultiUpCost Wcm.cc_multiup |
| 157 | #define MultiDownCost Wcm.cc_multidown |
| 158 | #define MultiLeftCost Wcm.cc_multileft |
| 159 | #define MultiRightCost Wcm.cc_multiright |
| 160 | #endif |
| 161 | |
| 162 | #define cmat(row,col) (curY = (row), curX = (col)) |
| 163 | #define cmplus(n) \ |
| 164 | { \ |
| 165 | if ((curX += (n)) >= FrameCols && !MagicWrap) \ |
| 166 | { \ |
| 167 | if (Wcm.cm_losewrap) losecursor (); \ |
| 168 | else if (AutoWrap) curX = 0, curY++; \ |
| 169 | else curX--; \ |
| 170 | } \ |
| 171 | } |
| 172 | |
| 173 | #define losecursor() (curX = -1, curY = -1) |
| 174 | |
| 175 | extern int cost; |
| 176 | extern int evalcost (); |
| 177 | |
| 178 | extern void cmcheckmagic (); |
| 179 | extern int cmputc (); |
| 180 | extern void cmcostinit (); |
| 181 | extern void cmgoto (); |
| 182 | extern void Wcm_clear (); |
| 183 | extern int Wcm_init (); |