1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
|
/*
* BRLTTY - A background process providing access to the console screen (when in
* text mode) for a blind person using a refreshable braille display.
*
* Copyright (C) 1995-2025 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU Lesser General Public License, as published by the Free Software
* Foundation; either version 2.1 of the License, or (at your option) any
* later version. Please see the file LICENSE-LGPL for details.
*
* Web Page: http://brltty.app/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <stdio.h>
#include <string.h>
#include <pc.h>
#include <go32.h>
#include <dpmi.h>
#include <sys/farptr.h>
#include "log.h"
#include "brl_cmds.h"
#include "charset.h"
#include "kbd_keycodes.h"
#include "scr_driver.h"
static int
processParameters_PcBiosScreen (char **parameters) {
return 1;
}
static int
construct_PcBiosScreen (void) {
return 1;
}
static void
destruct_PcBiosScreen (void) {
}
static void
describe_PcBiosScreen (ScreenDescription *description) {
int row, column;
description->rows = ScreenRows();
description->cols = ScreenCols();
ScreenGetCursor(&row, &column);
description->posx = column;
description->posy = row;
description->number = 1;
}
static int
readCharacters_PcBiosScreen (const ScreenBox *box, ScreenCharacter *buffer) {
unsigned offset = ScreenPrimary;
ScreenDescription description;
int row, col;
describe_PcBiosScreen(&description);
if (!validateScreenBox(box, description.cols, description.rows)) return 0;
_farsetsel(_go32_conventional_mem_selector());
for (row=box->top; row<box->top+box->height; ++row)
for (col=box->left; col<box->left+box->width; ++col) {
buffer->text = _farnspeekb(offset + row*description.cols*2 + col*2);
buffer->attributes = _farnspeekb(offset + row*description.cols*2 + col*2 + 1);
buffer++;
}
return 1;
}
static int
simulateKey (unsigned char scanCode, unsigned char asciiCode) {
__dpmi_regs r;
r.h.ah = 0x05;
r.h.ch = scanCode;
r.h.cl = asciiCode;
__dpmi_int(0x16, &r);
return !r.h.ah;
}
static int
insertMapped (ScreenKey key) {
char buffer[2];
char *sequence;
char *end;
if (isSpecialKey(key)) {
switch (key & SCR_KEY_CHAR_MASK) {
case SCR_KEY_ENTER:
sequence = "\r";
break;
case SCR_KEY_TAB:
sequence = "\t";
break;
case SCR_KEY_BACKSPACE:
sequence = "\x08";
break;
case SCR_KEY_ESCAPE:
sequence = "\x1b";
break;
case SCR_KEY_CURSOR_LEFT:
return(simulateKey(105, 0));
case SCR_KEY_CURSOR_RIGHT:
return(simulateKey(106, 0));
case SCR_KEY_CURSOR_UP:
return(simulateKey(103, 0));
case SCR_KEY_CURSOR_DOWN:
return(simulateKey(108, 0));
case SCR_KEY_PAGE_UP:
return(simulateKey(104, 0));
case SCR_KEY_PAGE_DOWN:
return(simulateKey(109, 0));
case SCR_KEY_HOME:
return(simulateKey(102, 0));
case SCR_KEY_END:
return(simulateKey(107, 0));
case SCR_KEY_INSERT:
return(simulateKey(110, 0));
case SCR_KEY_DELETE:
return(simulateKey(111, 0));
case SCR_KEY_FUNCTION + 0:
case SCR_KEY_FUNCTION + 1:
case SCR_KEY_FUNCTION + 2:
case SCR_KEY_FUNCTION + 3:
case SCR_KEY_FUNCTION + 4:
case SCR_KEY_FUNCTION + 5:
case SCR_KEY_FUNCTION + 6:
case SCR_KEY_FUNCTION + 7:
case SCR_KEY_FUNCTION + 8:
case SCR_KEY_FUNCTION + 9:
case SCR_KEY_FUNCTION + 10:
return(simulateKey(key - SCR_KEY_FUNCTION + 59, 0));
case SCR_KEY_FUNCTION + 11:
return(simulateKey(87, 0));
case SCR_KEY_FUNCTION + 12:
return(simulateKey(88, 0));
default:
logMessage(LOG_WARNING, "Key %4.4X not suported.", key);
return 0;
}
end = sequence + strlen(sequence);
} else {
int character = key & SCR_KEY_CHAR_MASK;
int c = convertWcharToChar(character);
if (c== EOF) {
logMessage(LOG_WARNING, "Character %d not supported", character);
return 0;
}
sequence = end = buffer + ARRAY_COUNT(buffer);
*--sequence = key & SCR_KEY_CHAR_MASK;
if (key & SCR_KEY_ALT_LEFT)
*--sequence = 0X1B;
}
while (sequence != end)
if (simulateKey(0, *sequence++))
return 0;
return 1;
}
static int
insertKey_PcBiosScreen (ScreenKey key) {
logMessage(LOG_DEBUG, "Insert key: %4.4X", key);
return insertMapped(key);
}
static int
currentVirtualTerminal_PcBiosScreen (void) {
return 1;
}
static int
handleCommand_PcBiosScreen (int command) {
int blk = command & BRL_MSK_BLK;
int arg = command & BRL_MSK_ARG;
int press = 0;
switch (blk) {
case BRL_CMD_BLK(PASSXT):
press = !(arg & 0X80);
arg &= 0X7F;
/* fallthrough */
case BRL_CMD_BLK(PASSAT): {
press |= !(command & BRL_FLG_KBD_RELEASE);
if (arg >= 0X80)
return 0;
if (command & BRL_FLG_KBD_EMUL0) {
if (!simulateKey(0XE0, 0))
return 0;
} else if (command & BRL_FLG_KBD_EMUL1) {
if (!simulateKey(0XE1, 0))
return 0;
}
if (blk == BRL_CMD_BLK(PASSAT))
arg = AT2XT[arg];
if (!press)
arg |= 0x80;
return simulateKey(arg, 0);
}
}
return 0;
}
static void
scr_initialize (MainScreen *main) {
initializeRealScreen(main);
main->base.describe = describe_PcBiosScreen;
main->base.readCharacters = readCharacters_PcBiosScreen;
main->base.insertKey = insertKey_PcBiosScreen;
main->base.currentVirtualTerminal = currentVirtualTerminal_PcBiosScreen;
main->base.handleCommand = handleCommand_PcBiosScreen;
main->processParameters = processParameters_PcBiosScreen;
main->construct = construct_PcBiosScreen;
main->destruct = destruct_PcBiosScreen;
}
|
