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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 | |
17f96a0f | 19 | static char sccsid[] = "@(#)xx.c 3.4 (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; | |
17f96a0f EW |
31 | /* ccinit may choose to change xxbufsize */ |
32 | if (tt.tt_ntoken > 0 && ccinit() < 0) | |
0ab446d2 | 33 | return -1; |
a8577ffd EW |
34 | xxbuf = malloc((unsigned) xxbufsize * sizeof *xxbuf); |
35 | if (xxbuf == 0) { | |
36 | wwerrno = WWE_NOMEM; | |
37 | return -1; | |
38 | } | |
39 | xxbufp = xxbuf; | |
40 | xxbufe = xxbuf + xxbufsize; | |
a8577ffd EW |
41 | return 0; |
42 | } | |
43 | ||
44 | xxstart() | |
45 | { | |
46 | (*tt.tt_start)(); | |
47 | if (tt.tt_ntoken > 0) | |
17f96a0f | 48 | ccstart(); |
a8577ffd EW |
49 | xxreset(); /* might be a restart */ |
50 | } | |
51 | ||
52 | xxend() | |
53 | { | |
54 | if (tt.tt_scroll_top != 0 || tt.tt_scroll_bot != tt.tt_nrow - 1) | |
55 | /* tt.tt_setscroll is known to be defined */ | |
56 | (*tt.tt_setscroll)(0, tt.tt_nrow - 1); | |
a8577ffd EW |
57 | if (tt.tt_modes) |
58 | (*tt.tt_setmodes)(0); | |
59 | if (tt.tt_scroll_down) | |
60 | (*tt.tt_scroll_down)(1); | |
61 | (*tt.tt_move)(tt.tt_nrow - 1, 0); | |
17f96a0f EW |
62 | if (tt.tt_ntoken > 0) |
63 | ccend(); | |
a8577ffd | 64 | (*tt.tt_end)(); |
17f96a0f | 65 | (*tt.tt_flush)(); |
a8577ffd EW |
66 | } |
67 | ||
68 | struct xx * | |
69 | xxalloc() | |
70 | { | |
71 | register struct xx *xp; | |
72 | ||
73 | if (xxbufp > xxbufe) | |
74 | abort(); | |
75 | if ((xp = xx_freelist) == 0) | |
76 | /* XXX can't deal with failure */ | |
77 | xp = (struct xx *) malloc((unsigned) sizeof *xp); | |
78 | else | |
79 | xx_freelist = xp->link; | |
80 | if (xx_head == 0) | |
81 | xx_head = xp; | |
82 | else | |
83 | xx_tail->link = xp; | |
84 | xx_tail = xp; | |
85 | xp->link = 0; | |
86 | return xp; | |
87 | } | |
88 | ||
89 | xxfree(xp) | |
90 | register struct xx *xp; | |
91 | { | |
92 | xp->link = xx_freelist; | |
93 | xx_freelist = xp; | |
94 | } | |
95 | ||
96 | xxmove(row, col) | |
97 | { | |
98 | register struct xx *xp = xx_tail; | |
99 | ||
100 | if (xp == 0 || xp->cmd != xc_move) { | |
101 | xp = xxalloc(); | |
102 | xp->cmd = xc_move; | |
103 | } | |
104 | xp->arg0 = row; | |
105 | xp->arg1 = col; | |
106 | } | |
107 | ||
108 | xxscroll(dir, top, bot) | |
109 | { | |
110 | register struct xx *xp = xx_tail; | |
111 | ||
112 | if (xp != 0 && xp->cmd == xc_scroll && | |
113 | xp->arg1 == top && xp->arg2 == bot && | |
114 | (xp->arg0 < 0 && dir < 0 || xp->arg0 > 0 && dir > 0)) { | |
115 | xp->arg0 += dir; | |
116 | return; | |
117 | } | |
118 | xp = xxalloc(); | |
119 | xp->cmd = xc_scroll; | |
120 | xp->arg0 = dir; | |
121 | xp->arg1 = top; | |
122 | xp->arg2 = bot; | |
123 | } | |
124 | ||
d9375810 EW |
125 | xxinschar(row, col, c, m) |
126 | { | |
127 | register struct xx *xp; | |
128 | ||
129 | xp = xxalloc(); | |
130 | xp->cmd = xc_inschar; | |
131 | xp->arg0 = row; | |
132 | xp->arg1 = col; | |
133 | xp->arg2 = c; | |
134 | xp->arg3 = m; | |
135 | } | |
136 | ||
137 | xxinsspace(row, col) | |
a8577ffd EW |
138 | { |
139 | register struct xx *xp = xx_tail; | |
d9375810 EW |
140 | |
141 | if (xp != 0 && xp->cmd == xc_insspace && xp->arg0 == row && | |
142 | col >= xp->arg1 && col <= xp->arg1 + xp->arg2) { | |
143 | xp->arg2++; | |
a8577ffd EW |
144 | return; |
145 | } | |
146 | xp = xxalloc(); | |
d9375810 | 147 | xp->cmd = xc_insspace; |
a8577ffd EW |
148 | xp->arg0 = row; |
149 | xp->arg1 = col; | |
150 | xp->arg2 = 1; | |
a8577ffd EW |
151 | } |
152 | ||
153 | xxdelchar(row, col) | |
154 | { | |
155 | register struct xx *xp = xx_tail; | |
156 | ||
157 | if (xp != 0 && xp->cmd == xc_delchar && | |
158 | xp->arg0 == row && xp->arg1 == col) { | |
159 | xp->arg2++; | |
160 | return; | |
161 | } | |
162 | xp = xxalloc(); | |
163 | xp->cmd = xc_delchar; | |
164 | xp->arg0 = row; | |
165 | xp->arg1 = col; | |
166 | xp->arg2 = 1; | |
167 | } | |
168 | ||
169 | xxclear() | |
170 | { | |
171 | register struct xx *xp; | |
172 | ||
173 | xxreset(); | |
174 | xp = xxalloc(); | |
175 | xp->cmd = xc_clear; | |
176 | } | |
177 | ||
178 | xxclreos(row, col) | |
179 | { | |
180 | register struct xx *xp = xxalloc(); | |
181 | ||
182 | xp->cmd = xc_clreos; | |
183 | xp->arg0 = row; | |
184 | xp->arg1 = col; | |
185 | } | |
186 | ||
187 | xxclreol(row, col) | |
188 | { | |
189 | register struct xx *xp = xxalloc(); | |
190 | ||
191 | xp->cmd = xc_clreol; | |
192 | xp->arg0 = row; | |
193 | xp->arg1 = col; | |
194 | } | |
195 | ||
196 | xxwrite(row, col, p, n, m) | |
197 | char *p; | |
198 | { | |
199 | register struct xx *xp; | |
200 | ||
0ab446d2 | 201 | if (xxbufp + n + 1 > xxbufe) |
a8577ffd EW |
202 | xxflush(0); |
203 | xp = xxalloc(); | |
204 | xp->cmd = xc_write; | |
205 | xp->arg0 = row; | |
206 | xp->arg1 = col; | |
207 | xp->arg2 = n; | |
208 | xp->arg3 = m; | |
209 | xp->buf = xxbufp; | |
210 | bcopy(p, xxbufp, n); | |
211 | xxbufp += n; | |
0ab446d2 | 212 | *xxbufp++ = char_sep; |
a8577ffd EW |
213 | } |
214 | ||
215 | xxreset() | |
216 | { | |
217 | register struct xx *xp, *xq; | |
218 | ||
219 | for (xp = xx_head; xp != 0; xp = xq) { | |
220 | xq = xp->link; | |
221 | xxfree(xp); | |
222 | } | |
223 | xx_tail = xx_head = 0; | |
224 | xxbufp = xxbuf; | |
a8577ffd | 225 | } |