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 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#include <linux/keyboard.h>
24#include "spk_priv.h"
25#include "speakup.h"
26
27#define MAXFUNCS 130
28#define MAXKEYS 256
29static const int num_key_names = MSG_KEYNAMES_END - MSG_KEYNAMES_START + 1;
30static u_short key_offsets[MAXFUNCS], key_data[MAXKEYS];
31static u_short masks[] = { 32, 16, 8, 4, 2, 1 };
32
33static short letter_offsets[26] = {
34 -1, -1, -1, -1, -1, -1, -1, -1,
35 -1, -1, -1, -1, -1, -1, -1, -1,
36 -1, -1, -1, -1, -1, -1, -1, -1,
37 -1, -1 };
38
39static u_char funcvals[] = {
40 ATTRIB_BLEEP_DEC, ATTRIB_BLEEP_INC, BLEEPS_DEC, BLEEPS_INC,
41 SAY_FIRST_CHAR, SAY_LAST_CHAR, SAY_CHAR, SAY_CHAR_NUM,
42 SAY_NEXT_CHAR, SAY_PHONETIC_CHAR, SAY_PREV_CHAR, SPEAKUP_PARKED,
43 SPEAKUP_CUT, EDIT_DELIM, EDIT_EXNUM, EDIT_MOST,
44 EDIT_REPEAT, EDIT_SOME, SPEAKUP_GOTO, BOTTOM_EDGE,
45 LEFT_EDGE, RIGHT_EDGE, TOP_EDGE, SPEAKUP_HELP,
46 SAY_LINE, SAY_NEXT_LINE, SAY_PREV_LINE, SAY_LINE_INDENT,
47 SPEAKUP_PASTE, PITCH_DEC, PITCH_INC, PUNCT_DEC,
48 PUNCT_INC, PUNC_LEVEL_DEC, PUNC_LEVEL_INC, SPEAKUP_QUIET,
49 RATE_DEC, RATE_INC, READING_PUNC_DEC, READING_PUNC_INC,
50 SAY_ATTRIBUTES, SAY_FROM_LEFT, SAY_FROM_TOP, SAY_POSITION,
51 SAY_SCREEN, SAY_TO_BOTTOM, SAY_TO_RIGHT, SPK_KEY,
52 SPK_LOCK, SPEAKUP_OFF, SPEECH_KILL, SPELL_DELAY_DEC,
53 SPELL_DELAY_INC, SPELL_WORD, SPELL_PHONETIC, TONE_DEC,
54 TONE_INC, VOICE_DEC, VOICE_INC, VOL_DEC,
55 VOL_INC, CLEAR_WIN, SAY_WIN, SET_WIN,
56 ENABLE_WIN, SAY_WORD, SAY_NEXT_WORD, SAY_PREV_WORD, 0
57};
58
59static u_char *state_tbl;
60static int cur_item, nstates;
61
62static void build_key_data(void)
63{
64 u_char *kp, counters[MAXFUNCS], ch, ch1;
65 u_short *p_key = key_data, key;
66 int i, offset = 1;
67 nstates = (int)(state_tbl[-1]);
68 memset(counters, 0, sizeof(counters));
69 memset(key_offsets, 0, sizeof(key_offsets));
70 kp = state_tbl + nstates + 1;
71 while (*kp++) {
72 /* count occurrences of each function */
73 for (i = 0; i < nstates; i++, kp++) {
74 if (!*kp)
75 continue;
76 if ((state_tbl[i]&16) != 0 && *kp == SPK_KEY)
77 continue;
78 counters[*kp]++;
79 }
80 }
81 for (i = 0; i < MAXFUNCS; i++) {
82 if (counters[i] == 0)
83 continue;
84 key_offsets[i] = offset;
85 offset += (counters[i]+1);
86 if (offset >= MAXKEYS)
87 break;
88 }
89/* leave counters set so high keycodes come first.
90 * this is done so num pad and other extended keys maps are spoken before
91 * the alpha with speakup type mapping.
92 */
93 kp = state_tbl + nstates + 1;
94 while ((ch = *kp++)) {
95 for (i = 0; i < nstates; i++) {
96 ch1 = *kp++;
97 if (!ch1)
98 continue;
99 if ((state_tbl[i]&16) != 0 && ch1 == SPK_KEY)
100 continue;
101 key = (state_tbl[i] << 8) + ch;
102 counters[ch1]--;
103 offset = key_offsets[ch1];
104 if (!offset)
105 continue;
106 p_key = key_data + offset + counters[ch1];
107 *p_key = key;
108 }
109 }
110}
111
112static void say_key(int key)
113{
114 int i, state = key >> 8;
115 key &= 0xff;
116 for (i = 0; i < 6; i++) {
117 if (state & masks[i])
118 synth_printf(" %s", spk_msg_get(MSG_STATES_START + i));
119 }
120 if ((key > 0) && (key <= num_key_names))
121 synth_printf(" %s\n",
122 spk_msg_get(MSG_KEYNAMES_START + (key - 1)));
123}
124
125static int help_init(void)
126{
127 char start = SPACE;
128 int i;
129 int num_funcs = MSG_FUNCNAMES_END - MSG_FUNCNAMES_START + 1;
130state_tbl = spk_our_keys[0]+SHIFT_TBL_SIZE+2;
131 for (i = 0; i < num_funcs; i++) {
132 char *cur_funcname = spk_msg_get(MSG_FUNCNAMES_START + i);
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 if (letter_offsets[0] == -1)
148 help_init();
149 if (type == KT_LATIN) {
150 if (ch == SPACE) {
151 spk_special_handler = NULL;
152 synth_printf("%s\n", spk_msg_get(MSG_LEAVING_HELP));
153 return 1;
154 }
155 ch |= 32; /* lower case */
156 if (ch < 'a' || ch > 'z')
157 return -1;
158 if (letter_offsets[ch-'a'] == -1) {
159 synth_printf(spk_msg_get(MSG_NO_COMMAND), ch);
160 synth_printf("\n");
161 return 1;
162 }
163 cur_item = letter_offsets[ch-'a'];
164 } else if (type == KT_CUR) {
165 if (ch == 0
166 && (MSG_FUNCNAMES_START + cur_item + 1) <=
167 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
174 && ch == SPEAKUP_HELP
175 && !spk_special_handler) {
176 spk_special_handler = spk_handle_help;
177 synth_printf("%s\n", spk_msg_get(MSG_HELP_INFO));
178 build_key_data(); /* rebuild each time in case new mapping */
179 return 1;
180 } else {
181 name = NULL;
182 if ((type != KT_SPKUP) && (key > 0) && (key <= num_key_names)) {
183 synth_printf("%s\n",
184 spk_msg_get(MSG_KEYNAMES_START + key-1));
185 return 1;
186 }
187 for (i = 0; funcvals[i] != 0 && !name; i++) {
188 if (ch == funcvals[i])
189 name = spk_msg_get(MSG_FUNCNAMES_START + i);
190 }
191 if (!name)
192 return -1;
193 kp = spk_our_keys[key]+1;
194 for (i = 0; i < nstates; i++) {
195 if (ch == kp[i])
196 break;
197 }
198 key += (state_tbl[i] << 8);
199 say_key(key);
200 synth_printf(spk_msg_get(MSG_KEYDESC), name);
201 synth_printf("\n");
202 return 1;
203 }
204 name = spk_msg_get(MSG_FUNCNAMES_START + cur_item);
205 func = funcvals[cur_item];
206 synth_printf("%s", name);
207 if (key_offsets[func] == 0) {
208 synth_printf(" %s\n", spk_msg_get(MSG_IS_UNASSIGNED));
209 return 1;
210 }
211 p_keys = key_data + key_offsets[func];
212 for (n = 0; p_keys[n]; n++) {
213 val = p_keys[n];
214 if (n > 0)
215 synth_printf("%s ", spk_msg_get(MSG_DISJUNCTION));
216 say_key(val);
217 }
218 return 1;
219}