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
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*
* 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) 1995-2014 by The BRLTTY Developers.
*
* BRLTTY comes with ABSOLUTELY NO WARRANTY.
*
* This is free software, placed under the terms of the
* GNU General Public License, as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any
* later version. Please see the file LICENSE-GPL for details.
*
* Web Page: http://mielke.cc/brltty/
*
* This software is maintained by Dave Mielke <dave@mielke.cc>.
*/
#include "prologue.h"
#include <string.h>
#include "log.h"
#include "report.h"
#include "cmd_queue.h"
#include "cmd_input.h"
#include "cmd_utils.h"
#include "brl_cmds.h"
#include "unicode.h"
#include "ttb.h"
#include "scr.h"
#include "brltty.h"
typedef struct {
ReportListenerInstance *resetListener;
int modifiers;
} InputCommandData;
static void
applyModifiers (InputCommandData *icd, int *modifiers) {
*modifiers |= icd->modifiers;
icd->modifiers = 0;
}
static int
insertKey (ScreenKey key, int flags) {
if (flags & BRL_FLG_CHAR_SHIFT) key |= SCR_KEY_SHIFT;
if (flags & BRL_FLG_CHAR_UPPER) key |= SCR_KEY_UPPER;
if (flags & BRL_FLG_CHAR_CONTROL) key |= SCR_KEY_CONTROL;
if (flags & BRL_FLG_CHAR_META) key |= SCR_KEY_ALT_LEFT;
return insertScreenKey(key);
}
static int
switchVirtualTerminal (int vt) {
int switched = switchScreenVirtualTerminal(vt);
if (switched) {
updateSessionAttributes();
} else {
alert(ALERT_COMMAND_REJECTED);
}
return switched;
}
static int
handleInputCommands (int command, void *data) {
InputCommandData *icd = data;
switch (command & BRL_MSK_CMD) {
{
int modifier;
case BRL_CMD_SHIFT:
modifier = BRL_FLG_CHAR_SHIFT;
goto doModifier;
case BRL_CMD_UPPER:
modifier = BRL_FLG_CHAR_UPPER;
goto doModifier;
case BRL_CMD_CONTROL:
modifier = BRL_FLG_CHAR_CONTROL;
goto doModifier;
case BRL_CMD_META:
modifier = BRL_FLG_CHAR_META;
goto doModifier;
doModifier:
toggleBit(&icd->modifiers, modifier, command, ALERT_TOGGLE_OFF, ALERT_TOGGLE_ON);
break;
}
case BRL_CMD_SWITCHVT_PREV:
switchVirtualTerminal(scr.number-1);
break;
case BRL_CMD_SWITCHVT_NEXT:
switchVirtualTerminal(scr.number+1);
break;
default: {
int arg = command & BRL_MSK_ARG;
int flags = command & BRL_MSK_FLG;
switch (command & BRL_MSK_BLK) {
case BRL_CMD_BLK(PASSKEY): {
ScreenKey key;
switch (arg) {
case BRL_KEY_ENTER:
key = SCR_KEY_ENTER;
break;
case BRL_KEY_TAB:
key = SCR_KEY_TAB;
break;
case BRL_KEY_BACKSPACE:
key = SCR_KEY_BACKSPACE;
break;
case BRL_KEY_ESCAPE:
key = SCR_KEY_ESCAPE;
break;
case BRL_KEY_CURSOR_LEFT:
key = SCR_KEY_CURSOR_LEFT;
break;
case BRL_KEY_CURSOR_RIGHT:
key = SCR_KEY_CURSOR_RIGHT;
break;
case BRL_KEY_CURSOR_UP:
key = SCR_KEY_CURSOR_UP;
break;
case BRL_KEY_CURSOR_DOWN:
key = SCR_KEY_CURSOR_DOWN;
break;
case BRL_KEY_PAGE_UP:
key = SCR_KEY_PAGE_UP;
break;
case BRL_KEY_PAGE_DOWN:
key = SCR_KEY_PAGE_DOWN;
break;
case BRL_KEY_HOME:
key = SCR_KEY_HOME;
break;
case BRL_KEY_END:
key = SCR_KEY_END;
break;
case BRL_KEY_INSERT:
key = SCR_KEY_INSERT;
break;
case BRL_KEY_DELETE:
key = SCR_KEY_DELETE;
break;
default:
if (arg < BRL_KEY_FUNCTION) goto badKey;
key = SCR_KEY_FUNCTION + (arg - BRL_KEY_FUNCTION);
break;
}
applyModifiers(icd, &flags);
if (!insertKey(key, flags)) {
badKey:
alert(ALERT_COMMAND_REJECTED);
}
break;
}
case BRL_CMD_BLK(PASSCHAR): {
applyModifiers(icd, &flags);
if (!insertKey(BRL_ARG_GET(command), flags)) alert(ALERT_COMMAND_REJECTED);
break;
}
case BRL_CMD_BLK(PASSDOTS): {
wchar_t character;
switch (prefs.brailleInputMode) {
case BRL_INPUT_TEXT:
character = convertDotsToCharacter(textTable, arg);
break;
case BRL_INPUT_DOTS:
character = UNICODE_BRAILLE_ROW | arg;
break;
default:
character = UNICODE_REPLACEMENT_CHARACTER;
break;
}
applyModifiers(icd, &flags);
if (!insertKey(character, flags)) alert(ALERT_COMMAND_REJECTED);
break;
}
case BRL_CMD_BLK(SWITCHVT):
switchVirtualTerminal(arg+1);
break;
default:
return 0;
}
break;
}
}
return 1;
}
static void
resetInputCommandData (InputCommandData *icd) {
icd->modifiers = 0;
}
REPORT_LISTENER(inputCommandDataResetListener) {
InputCommandData *icd = parameters->listenerData;
resetInputCommandData(icd);
}
static void
destroyInputCommandData (void *data) {
InputCommandData *icd = data;
unregisterReportListener(icd->resetListener);
free(icd);
}
int
addInputCommands (void) {
InputCommandData *icd;
if ((icd = malloc(sizeof(*icd)))) {
memset(icd, 0, sizeof(*icd));
resetInputCommandData(icd);
if ((icd->resetListener = registerReportListener(REPORT_BRAILLE_ONLINE, inputCommandDataResetListener, icd))) {
if (pushCommandHandler("input", KTB_CTX_DEFAULT,
handleInputCommands, destroyInputCommandData, icd)) {
return 1;
}
unregisterReportListener(icd->resetListener);
}
free(icd);
} else {
logMallocError();
}
return 0;
}
|
