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a8577ffd EW |
1 | /* |
2 | * Copyright (c) 1989 Regents of the University of California. | |
3 | * All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
6 | * provided that the above copyright notice and this paragraph are | |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
16 | */ | |
17 | ||
18 | #ifndef lint | |
d9375810 | 19 | static char sccsid[] = "@(#)xx.c 3.2 (Berkeley) %G%"; |
a8577ffd EW |
20 | #endif /* not lint */ |
21 | ||
22 | #include "ww.h" | |
23 | #include "xx.h" | |
24 | #include "tt.h" | |
25 | ||
26 | xxinit() | |
27 | { | |
28 | if (ttinit() < 0) | |
29 | return -1; | |
30 | xxbufsize = tt.tt_nrow * tt.tt_ncol * 2; | |
31 | xxbuf = malloc((unsigned) xxbufsize * sizeof *xxbuf); | |
32 | if (xxbuf == 0) { | |
33 | wwerrno = WWE_NOMEM; | |
34 | return -1; | |
35 | } | |
36 | xxbufp = xxbuf; | |
37 | xxbufe = xxbuf + xxbufsize; | |
38 | if (tt.tt_ntoken > 0 && xcinit() < 0) | |
39 | return -1; | |
40 | return 0; | |
41 | } | |
42 | ||
43 | xxstart() | |
44 | { | |
45 | (*tt.tt_start)(); | |
46 | if (tt.tt_ntoken > 0) | |
47 | xcstart(); | |
48 | xxreset(); /* might be a restart */ | |
49 | } | |
50 | ||
51 | xxend() | |
52 | { | |
53 | if (tt.tt_scroll_top != 0 || tt.tt_scroll_bot != tt.tt_nrow - 1) | |
54 | /* tt.tt_setscroll is known to be defined */ | |
55 | (*tt.tt_setscroll)(0, tt.tt_nrow - 1); | |
a8577ffd EW |
56 | if (tt.tt_modes) |
57 | (*tt.tt_setmodes)(0); | |
58 | if (tt.tt_scroll_down) | |
59 | (*tt.tt_scroll_down)(1); | |
60 | (*tt.tt_move)(tt.tt_nrow - 1, 0); | |
61 | (*tt.tt_end)(); | |
62 | ttflush(); | |
63 | } | |
64 | ||
65 | struct xx * | |
66 | xxalloc() | |
67 | { | |
68 | register struct xx *xp; | |
69 | ||
70 | if (xxbufp > xxbufe) | |
71 | abort(); | |
72 | if ((xp = xx_freelist) == 0) | |
73 | /* XXX can't deal with failure */ | |
74 | xp = (struct xx *) malloc((unsigned) sizeof *xp); | |
75 | else | |
76 | xx_freelist = xp->link; | |
77 | if (xx_head == 0) | |
78 | xx_head = xp; | |
79 | else | |
80 | xx_tail->link = xp; | |
81 | xx_tail = xp; | |
82 | xp->link = 0; | |
83 | return xp; | |
84 | } | |
85 | ||
86 | xxfree(xp) | |
87 | register struct xx *xp; | |
88 | { | |
89 | xp->link = xx_freelist; | |
90 | xx_freelist = xp; | |
91 | } | |
92 | ||
93 | xxmove(row, col) | |
94 | { | |
95 | register struct xx *xp = xx_tail; | |
96 | ||
97 | if (xp == 0 || xp->cmd != xc_move) { | |
98 | xp = xxalloc(); | |
99 | xp->cmd = xc_move; | |
100 | } | |
101 | xp->arg0 = row; | |
102 | xp->arg1 = col; | |
103 | } | |
104 | ||
105 | xxscroll(dir, top, bot) | |
106 | { | |
107 | register struct xx *xp = xx_tail; | |
108 | ||
109 | if (xp != 0 && xp->cmd == xc_scroll && | |
110 | xp->arg1 == top && xp->arg2 == bot && | |
111 | (xp->arg0 < 0 && dir < 0 || xp->arg0 > 0 && dir > 0)) { | |
112 | xp->arg0 += dir; | |
113 | return; | |
114 | } | |
115 | xp = xxalloc(); | |
116 | xp->cmd = xc_scroll; | |
117 | xp->arg0 = dir; | |
118 | xp->arg1 = top; | |
119 | xp->arg2 = bot; | |
120 | } | |
121 | ||
d9375810 EW |
122 | xxinschar(row, col, c, m) |
123 | { | |
124 | register struct xx *xp; | |
125 | ||
126 | xp = xxalloc(); | |
127 | xp->cmd = xc_inschar; | |
128 | xp->arg0 = row; | |
129 | xp->arg1 = col; | |
130 | xp->arg2 = c; | |
131 | xp->arg3 = m; | |
132 | } | |
133 | ||
134 | xxinsspace(row, col) | |
a8577ffd EW |
135 | { |
136 | register struct xx *xp = xx_tail; | |
d9375810 EW |
137 | |
138 | if (xp != 0 && xp->cmd == xc_insspace && xp->arg0 == row && | |
139 | col >= xp->arg1 && col <= xp->arg1 + xp->arg2) { | |
140 | xp->arg2++; | |
a8577ffd EW |
141 | return; |
142 | } | |
143 | xp = xxalloc(); | |
d9375810 | 144 | xp->cmd = xc_insspace; |
a8577ffd EW |
145 | xp->arg0 = row; |
146 | xp->arg1 = col; | |
147 | xp->arg2 = 1; | |
a8577ffd EW |
148 | } |
149 | ||
150 | xxdelchar(row, col) | |
151 | { | |
152 | register struct xx *xp = xx_tail; | |
153 | ||
154 | if (xp != 0 && xp->cmd == xc_delchar && | |
155 | xp->arg0 == row && xp->arg1 == col) { | |
156 | xp->arg2++; | |
157 | return; | |
158 | } | |
159 | xp = xxalloc(); | |
160 | xp->cmd = xc_delchar; | |
161 | xp->arg0 = row; | |
162 | xp->arg1 = col; | |
163 | xp->arg2 = 1; | |
164 | } | |
165 | ||
166 | xxclear() | |
167 | { | |
168 | register struct xx *xp; | |
169 | ||
170 | xxreset(); | |
171 | xp = xxalloc(); | |
172 | xp->cmd = xc_clear; | |
173 | } | |
174 | ||
175 | xxclreos(row, col) | |
176 | { | |
177 | register struct xx *xp = xxalloc(); | |
178 | ||
179 | xp->cmd = xc_clreos; | |
180 | xp->arg0 = row; | |
181 | xp->arg1 = col; | |
182 | } | |
183 | ||
184 | xxclreol(row, col) | |
185 | { | |
186 | register struct xx *xp = xxalloc(); | |
187 | ||
188 | xp->cmd = xc_clreol; | |
189 | xp->arg0 = row; | |
190 | xp->arg1 = col; | |
191 | } | |
192 | ||
193 | xxwrite(row, col, p, n, m) | |
194 | char *p; | |
195 | { | |
196 | register struct xx *xp; | |
197 | ||
198 | if (xxbufp + n > xxbufe) | |
199 | xxflush(0); | |
200 | xp = xxalloc(); | |
201 | xp->cmd = xc_write; | |
202 | xp->arg0 = row; | |
203 | xp->arg1 = col; | |
204 | xp->arg2 = n; | |
205 | xp->arg3 = m; | |
206 | xp->buf = xxbufp; | |
207 | bcopy(p, xxbufp, n); | |
208 | xxbufp += n; | |
209 | if (tt.tt_ntoken > 0) | |
210 | xcscan(xp->buf, n, xp->buf - xxbuf); | |
211 | } | |
212 | ||
213 | xxreset() | |
214 | { | |
215 | register struct xx *xp, *xq; | |
216 | ||
217 | for (xp = xx_head; xp != 0; xp = xq) { | |
218 | xq = xp->link; | |
219 | xxfree(xp); | |
220 | } | |
221 | xx_tail = xx_head = 0; | |
222 | xxbufp = xxbuf; | |
223 | if (tt.tt_ntoken > 0) | |
224 | xcreset(); | |
225 | } |