Linux kernel mirror (for testing)
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linux
1/* speakup_keyhelp.c
2 * help module for speakup
3 *
4 *written by David Borowski.
5 *
6 * Copyright (C) 2003 David Borowski.
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#include <linux/keyboard.h>
20#include "spk_priv.h"
21#include "speakup.h"
22
23#define MAXFUNCS 130
24#define MAXKEYS 256
25static const int num_key_names = MSG_KEYNAMES_END - MSG_KEYNAMES_START + 1;
26static u_short key_offsets[MAXFUNCS], key_data[MAXKEYS];
27static u_short masks[] = { 32, 16, 8, 4, 2, 1 };
28
29static short letter_offsets[26] = {
30 -1, -1, -1, -1, -1, -1, -1, -1,
31 -1, -1, -1, -1, -1, -1, -1, -1,
32 -1, -1, -1, -1, -1, -1, -1, -1,
33 -1, -1 };
34
35static u_char funcvals[] = {
36 ATTRIB_BLEEP_DEC, ATTRIB_BLEEP_INC, BLEEPS_DEC, BLEEPS_INC,
37 SAY_FIRST_CHAR, SAY_LAST_CHAR, SAY_CHAR, SAY_CHAR_NUM,
38 SAY_NEXT_CHAR, SAY_PHONETIC_CHAR, SAY_PREV_CHAR, SPEAKUP_PARKED,
39 SPEAKUP_CUT, EDIT_DELIM, EDIT_EXNUM, EDIT_MOST,
40 EDIT_REPEAT, EDIT_SOME, SPEAKUP_GOTO, BOTTOM_EDGE,
41 LEFT_EDGE, RIGHT_EDGE, TOP_EDGE, SPEAKUP_HELP,
42 SAY_LINE, SAY_NEXT_LINE, SAY_PREV_LINE, SAY_LINE_INDENT,
43 SPEAKUP_PASTE, PITCH_DEC, PITCH_INC, PUNCT_DEC,
44 PUNCT_INC, PUNC_LEVEL_DEC, PUNC_LEVEL_INC, SPEAKUP_QUIET,
45 RATE_DEC, RATE_INC, READING_PUNC_DEC, READING_PUNC_INC,
46 SAY_ATTRIBUTES, SAY_FROM_LEFT, SAY_FROM_TOP, SAY_POSITION,
47 SAY_SCREEN, SAY_TO_BOTTOM, SAY_TO_RIGHT, SPK_KEY,
48 SPK_LOCK, SPEAKUP_OFF, SPEECH_KILL, SPELL_DELAY_DEC,
49 SPELL_DELAY_INC, SPELL_WORD, SPELL_PHONETIC, TONE_DEC,
50 TONE_INC, VOICE_DEC, VOICE_INC, VOL_DEC,
51 VOL_INC, CLEAR_WIN, SAY_WIN, SET_WIN,
52 ENABLE_WIN, SAY_WORD, SAY_NEXT_WORD, SAY_PREV_WORD, 0
53};
54
55static u_char *state_tbl;
56static int cur_item, nstates;
57
58static void build_key_data(void)
59{
60 u_char *kp, counters[MAXFUNCS], ch, ch1;
61 u_short *p_key = key_data, key;
62 int i, offset = 1;
63
64 nstates = (int)(state_tbl[-1]);
65 memset(counters, 0, sizeof(counters));
66 memset(key_offsets, 0, sizeof(key_offsets));
67 kp = state_tbl + nstates + 1;
68 while (*kp++) {
69 /* count occurrences of each function */
70 for (i = 0; i < nstates; i++, kp++) {
71 if (!*kp)
72 continue;
73 if ((state_tbl[i] & 16) != 0 && *kp == SPK_KEY)
74 continue;
75 counters[*kp]++;
76 }
77 }
78 for (i = 0; i < MAXFUNCS; i++) {
79 if (counters[i] == 0)
80 continue;
81 key_offsets[i] = offset;
82 offset += (counters[i] + 1);
83 if (offset >= MAXKEYS)
84 break;
85 }
86/* leave counters set so high keycodes come first.
87 * this is done so num pad and other extended keys maps are spoken before
88 * the alpha with speakup type mapping.
89 */
90 kp = state_tbl + nstates + 1;
91 while ((ch = *kp++)) {
92 for (i = 0; i < nstates; i++) {
93 ch1 = *kp++;
94 if (!ch1)
95 continue;
96 if ((state_tbl[i] & 16) != 0 && ch1 == SPK_KEY)
97 continue;
98 key = (state_tbl[i] << 8) + ch;
99 counters[ch1]--;
100 offset = key_offsets[ch1];
101 if (!offset)
102 continue;
103 p_key = key_data + offset + counters[ch1];
104 *p_key = key;
105 }
106 }
107}
108
109static void say_key(int key)
110{
111 int i, state = key >> 8;
112
113 key &= 0xff;
114 for (i = 0; i < 6; i++) {
115 if (state & masks[i])
116 synth_printf(" %s", spk_msg_get(MSG_STATES_START + i));
117 }
118 if ((key > 0) && (key <= num_key_names))
119 synth_printf(" %s\n",
120 spk_msg_get(MSG_KEYNAMES_START + (key - 1)));
121}
122
123static int help_init(void)
124{
125 char start = SPACE;
126 int i;
127 int num_funcs = MSG_FUNCNAMES_END - MSG_FUNCNAMES_START + 1;
128
129 state_tbl = spk_our_keys[0] + SHIFT_TBL_SIZE + 2;
130 for (i = 0; i < num_funcs; i++) {
131 char *cur_funcname = spk_msg_get(MSG_FUNCNAMES_START + i);
132
133 if (start == *cur_funcname)
134 continue;
135 start = *cur_funcname;
136 letter_offsets[(start & 31) - 1] = i;
137 }
138 return 0;
139}
140
141int spk_handle_help(struct vc_data *vc, u_char type, u_char ch, u_short key)
142{
143 int i, n;
144 char *name;
145 u_char func, *kp;
146 u_short *p_keys, val;
147
148 if (letter_offsets[0] == -1)
149 help_init();
150 if (type == KT_LATIN) {
151 if (ch == SPACE) {
152 spk_special_handler = NULL;
153 synth_printf("%s\n", spk_msg_get(MSG_LEAVING_HELP));
154 return 1;
155 }
156 ch |= 32; /* lower case */
157 if (ch < 'a' || ch > 'z')
158 return -1;
159 if (letter_offsets[ch - 'a'] == -1) {
160 synth_printf(spk_msg_get(MSG_NO_COMMAND), ch);
161 synth_printf("\n");
162 return 1;
163 }
164 cur_item = letter_offsets[ch - 'a'];
165 } else if (type == KT_CUR) {
166 if (ch == 0 &&
167 (MSG_FUNCNAMES_START + cur_item + 1) <= MSG_FUNCNAMES_END)
168 cur_item++;
169 else if (ch == 3 && cur_item > 0)
170 cur_item--;
171 else
172 return -1;
173 } else if (type == KT_SPKUP && ch == SPEAKUP_HELP &&
174 !spk_special_handler) {
175 spk_special_handler = spk_handle_help;
176 synth_printf("%s\n", spk_msg_get(MSG_HELP_INFO));
177 build_key_data(); /* rebuild each time in case new mapping */
178 return 1;
179 } else {
180 name = NULL;
181 if ((type != KT_SPKUP) && (key > 0) && (key <= num_key_names)) {
182 synth_printf("%s\n",
183 spk_msg_get(MSG_KEYNAMES_START + key - 1));
184 return 1;
185 }
186 for (i = 0; funcvals[i] != 0 && !name; i++) {
187 if (ch == funcvals[i])
188 name = spk_msg_get(MSG_FUNCNAMES_START + i);
189 }
190 if (!name)
191 return -1;
192 kp = spk_our_keys[key] + 1;
193 for (i = 0; i < nstates; i++) {
194 if (ch == kp[i])
195 break;
196 }
197 key += (state_tbl[i] << 8);
198 say_key(key);
199 synth_printf(spk_msg_get(MSG_KEYDESC), name);
200 synth_printf("\n");
201 return 1;
202 }
203 name = spk_msg_get(MSG_FUNCNAMES_START + cur_item);
204 func = funcvals[cur_item];
205 synth_printf("%s", name);
206 if (key_offsets[func] == 0) {
207 synth_printf(" %s\n", spk_msg_get(MSG_IS_UNASSIGNED));
208 return 1;
209 }
210 p_keys = key_data + key_offsets[func];
211 for (n = 0; p_keys[n]; n++) {
212 val = p_keys[n];
213 if (n > 0)
214 synth_printf("%s ", spk_msg_get(MSG_DISJUNCTION));
215 say_key(val);
216 }
217 return 1;
218}