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9889c728 JB |
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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
19 | ||
20 | /* Holds the minimum and maximum costs for the parametrized capabilities. */ | |
21 | struct parmcap | |
22 | { | |
23 | int mincost, maxcost; | |
24 | }; | |
25 | ||
26 | /* This structure holds everything needed to do cursor motion except the pad | |
27 | character (PC) and the output speed of the terminal (ospeed), which | |
28 | termcap wants in global variables. */ | |
29 | ||
30 | struct cm | |
31 | { | |
32 | /* Cursor position. -1 in *both* variables means the cursor | |
33 | position is unknown, in order to force absolute cursor motion. */ | |
34 | ||
35 | int cm_curY; /* Current row */ | |
36 | int cm_curX; /* Current column */ | |
37 | ||
38 | /* Capabilities from termcap */ | |
39 | char *cm_up; /* up (up) */ | |
40 | char *cm_down; /* down (do) */ | |
41 | char *cm_left; /* left (le) */ | |
42 | char *cm_right; /* right (nd) */ | |
43 | char *cm_home; /* home (ho) */ | |
44 | char *cm_cr; /* carriage return (cr) */ | |
45 | char *cm_ll; /* last line (ll) */ | |
46 | char *cm_tab; /* tab (ta) */ | |
47 | char *cm_backtab; /* backtab (bt) */ | |
48 | char *cm_abs; /* absolute (cm) */ | |
49 | char *cm_habs; /* horizontal absolute (ch) */ | |
50 | char *cm_vabs; /* vertical absolute (cv) */ | |
51 | #if 0 | |
52 | char *cm_ds; /* "don't send" string (ds) */ | |
53 | #endif | |
54 | char *cm_multiup; /* multiple up (UP) */ | |
55 | char *cm_multidown; /* multiple down (DO) */ | |
56 | char *cm_multileft; /* multiple left (LE) */ | |
57 | char *cm_multiright; /* multiple right (RI) */ | |
58 | int cm_cols; /* number of cols on screen (co) */ | |
59 | int cm_rows; /* number of rows on screen (li) */ | |
60 | int cm_tabwidth; /* tab width (it) */ | |
61 | unsigned int cm_autowrap:1; /* autowrap flag (am) */ | |
62 | unsigned int cm_magicwrap:1; /* VT-100: cursor stays in last col but | |
63 | will cm_wrap if next char is | |
64 | printing (xn) */ | |
65 | unsigned int cm_usetabs:1; /* if set, use tabs */ | |
66 | unsigned int cm_losewrap:1; /* if reach right margin, forget cursor | |
67 | location */ | |
68 | unsigned int cm_autolf:1; /* \r performs a \r\n (rn) */ | |
69 | ||
70 | /* Parametrized capabilities. This needs to be a struct since | |
71 | the costs are accessed through pointers. */ | |
72 | ||
73 | #if 0 | |
74 | struct parmcap cc_abs; /* absolute (cm) */ | |
75 | struct parmcap cc_habs; /* horizontal absolute (ch) */ | |
76 | struct parmcap cc_vabs; /* vertical absolute (cv) */ | |
77 | struct parmcap cc_multiup; /* multiple up (UP) */ | |
78 | struct parmcap cc_multidown; /* multiple down (DO) */ | |
79 | struct parmcap cc_multileft; /* multiple left (LE) */ | |
80 | struct parmcap cc_multiright; /* multiple right (RI) */ | |
81 | #endif | |
82 | ||
83 | /* Costs for the non-parametrized capabilities */ | |
84 | int cc_up; /* cost for up */ | |
85 | int cc_down; /* etc. */ | |
86 | int cc_left; | |
87 | int cc_right; | |
88 | int cc_home; | |
89 | int cc_cr; | |
90 | int cc_ll; | |
91 | int cc_tab; | |
92 | int cc_backtab; | |
93 | /* These are temporary, until the code is installed to use the | |
94 | struct parmcap fields above. */ | |
95 | int cc_abs; | |
96 | int cc_habs; | |
97 | int cc_vabs; | |
98 | }; | |
99 | ||
100 | extern struct cm Wcm; /* Terminal capabilities */ | |
101 | extern char PC; /* Pad character */ | |
102 | extern short ospeed; /* Output speed (from sg_ospeed) */ | |
103 | ||
104 | /* Shorthand */ | |
105 | #ifndef NoCMShortHand | |
106 | #define curY Wcm.cm_curY | |
107 | #define curX Wcm.cm_curX | |
108 | #define Up Wcm.cm_up | |
109 | #define Down Wcm.cm_down | |
110 | #define Left Wcm.cm_left | |
111 | #define Right Wcm.cm_right | |
112 | #define Tab Wcm.cm_tab | |
113 | #define BackTab Wcm.cm_backtab | |
114 | #define TabWidth Wcm.cm_tabwidth | |
115 | #define CR Wcm.cm_cr | |
116 | #define Home Wcm.cm_home | |
117 | #define LastLine Wcm.cm_ll | |
118 | #define AbsPosition Wcm.cm_abs | |
119 | #define ColPosition Wcm.cm_habs | |
120 | #define RowPosition Wcm.cm_vabs | |
121 | #define MultiUp Wcm.cm_multiup | |
122 | #define MultiDown Wcm.cm_multidown | |
123 | #define MultiLeft Wcm.cm_multileft | |
124 | #define MultiRight Wcm.cm_multiright | |
125 | #define AutoWrap Wcm.cm_autowrap | |
126 | #define MagicWrap Wcm.cm_magicwrap | |
127 | #define UseTabs Wcm.cm_usetabs | |
e6dd9901 JB |
128 | #define FrameRows Wcm.cm_rows |
129 | #define FrameCols Wcm.cm_cols | |
9889c728 JB |
130 | |
131 | #define UpCost Wcm.cc_up | |
132 | #define DownCost Wcm.cc_down | |
133 | #define LeftCost Wcm.cc_left | |
134 | #define RightCost Wcm.cc_right | |
135 | #define HomeCost Wcm.cc_home | |
136 | #define CRCost Wcm.cc_cr | |
137 | #define LastLineCost Wcm.cc_ll | |
138 | #define TabCost Wcm.cc_tab | |
139 | #define BackTabCost Wcm.cc_backtab | |
140 | #define AbsPositionCost Wcm.cc_abs | |
141 | #define ColPositionCost Wcm.cc_habs | |
142 | #define RowPositionCost Wcm.cc_vabs | |
143 | #define MultiUpCost Wcm.cc_multiup | |
144 | #define MultiDownCost Wcm.cc_multidown | |
145 | #define MultiLeftCost Wcm.cc_multileft | |
146 | #define MultiRightCost Wcm.cc_multiright | |
147 | #endif | |
148 | ||
149 | #define cmat(row,col) (curY = (row), curX = (col)) | |
150 | #define cmplus(n) \ | |
151 | { \ | |
e6dd9901 | 152 | if ((curX += (n)) >= FrameCols && !MagicWrap) \ |
9889c728 JB |
153 | { \ |
154 | if (Wcm.cm_losewrap) losecursor (); \ | |
155 | else if (AutoWrap) curX = 0, curY++; \ | |
156 | else curX--; \ | |
157 | } \ | |
158 | } | |
159 | ||
160 | #define losecursor() (curX = -1, curY = -1) | |
161 | ||
162 | extern int cost; | |
163 | extern int evalcost (); | |
164 | ||
165 | extern void cmputc (); | |
166 | extern int cmcostinit (); | |
167 | extern int cmgoto (); | |
168 | extern int Wcm_clear (); | |
169 | extern int Wcm_init (); |