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
29 static const int num_key_names = MSG_KEYNAMES_END - MSG_KEYNAMES_START + 1;
30 static u_short key_offsets[MAXFUNCS], key_data[MAXKEYS];
31 static u_short masks[] = { 32, 16, 8, 4, 2, 1 };
32
33 static 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
39 static 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
59 static u_char *state_tbl;
60 static int cur_item, nstates;
61
build_key_data(void)62 static 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
68 nstates = (int)(state_tbl[-1]);
69 memset(counters, 0, sizeof(counters));
70 memset(key_offsets, 0, sizeof(key_offsets));
71 kp = state_tbl + nstates + 1;
72 while (*kp++) {
73 /* count occurrences of each function */
74 for (i = 0; i < nstates; i++, kp++) {
75 if (!*kp)
76 continue;
77 if ((state_tbl[i]&16) != 0 && *kp == SPK_KEY)
78 continue;
79 counters[*kp]++;
80 }
81 }
82 for (i = 0; i < MAXFUNCS; i++) {
83 if (counters[i] == 0)
84 continue;
85 key_offsets[i] = offset;
86 offset += (counters[i]+1);
87 if (offset >= MAXKEYS)
88 break;
89 }
90 /* leave counters set so high keycodes come first.
91 * this is done so num pad and other extended keys maps are spoken before
92 * the alpha with speakup type mapping.
93 */
94 kp = state_tbl + nstates + 1;
95 while ((ch = *kp++)) {
96 for (i = 0; i < nstates; i++) {
97 ch1 = *kp++;
98 if (!ch1)
99 continue;
100 if ((state_tbl[i]&16) != 0 && ch1 == SPK_KEY)
101 continue;
102 key = (state_tbl[i] << 8) + ch;
103 counters[ch1]--;
104 offset = key_offsets[ch1];
105 if (!offset)
106 continue;
107 p_key = key_data + offset + counters[ch1];
108 *p_key = key;
109 }
110 }
111 }
112
say_key(int key)113 static void say_key(int key)
114 {
115 int i, state = key >> 8;
116
117 key &= 0xff;
118 for (i = 0; i < 6; i++) {
119 if (state & masks[i])
120 synth_printf(" %s", spk_msg_get(MSG_STATES_START + i));
121 }
122 if ((key > 0) && (key <= num_key_names))
123 synth_printf(" %s\n",
124 spk_msg_get(MSG_KEYNAMES_START + (key - 1)));
125 }
126
help_init(void)127 static int help_init(void)
128 {
129 char start = SPACE;
130 int i;
131 int num_funcs = MSG_FUNCNAMES_END - MSG_FUNCNAMES_START + 1;
132
133 state_tbl = spk_our_keys[0]+SHIFT_TBL_SIZE+2;
134 for (i = 0; i < num_funcs; i++) {
135 char *cur_funcname = spk_msg_get(MSG_FUNCNAMES_START + i);
136
137 if (start == *cur_funcname)
138 continue;
139 start = *cur_funcname;
140 letter_offsets[(start&31)-1] = i;
141 }
142 return 0;
143 }
144
spk_handle_help(struct vc_data * vc,u_char type,u_char ch,u_short key)145 int spk_handle_help(struct vc_data *vc, u_char type, u_char ch, u_short key)
146 {
147 int i, n;
148 char *name;
149 u_char func, *kp;
150 u_short *p_keys, val;
151
152 if (letter_offsets[0] == -1)
153 help_init();
154 if (type == KT_LATIN) {
155 if (ch == SPACE) {
156 spk_special_handler = NULL;
157 synth_printf("%s\n", spk_msg_get(MSG_LEAVING_HELP));
158 return 1;
159 }
160 ch |= 32; /* lower case */
161 if (ch < 'a' || ch > 'z')
162 return -1;
163 if (letter_offsets[ch-'a'] == -1) {
164 synth_printf(spk_msg_get(MSG_NO_COMMAND), ch);
165 synth_printf("\n");
166 return 1;
167 }
168 cur_item = letter_offsets[ch-'a'];
169 } else if (type == KT_CUR) {
170 if (ch == 0
171 && (MSG_FUNCNAMES_START + cur_item + 1) <=
172 MSG_FUNCNAMES_END)
173 cur_item++;
174 else if (ch == 3 && cur_item > 0)
175 cur_item--;
176 else
177 return -1;
178 } else if (type == KT_SPKUP
179 && ch == SPEAKUP_HELP
180 && !spk_special_handler) {
181 spk_special_handler = spk_handle_help;
182 synth_printf("%s\n", spk_msg_get(MSG_HELP_INFO));
183 build_key_data(); /* rebuild each time in case new mapping */
184 return 1;
185 } else {
186 name = NULL;
187 if ((type != KT_SPKUP) && (key > 0) && (key <= num_key_names)) {
188 synth_printf("%s\n",
189 spk_msg_get(MSG_KEYNAMES_START + key-1));
190 return 1;
191 }
192 for (i = 0; funcvals[i] != 0 && !name; i++) {
193 if (ch == funcvals[i])
194 name = spk_msg_get(MSG_FUNCNAMES_START + i);
195 }
196 if (!name)
197 return -1;
198 kp = spk_our_keys[key]+1;
199 for (i = 0; i < nstates; i++) {
200 if (ch == kp[i])
201 break;
202 }
203 key += (state_tbl[i] << 8);
204 say_key(key);
205 synth_printf(spk_msg_get(MSG_KEYDESC), name);
206 synth_printf("\n");
207 return 1;
208 }
209 name = spk_msg_get(MSG_FUNCNAMES_START + cur_item);
210 func = funcvals[cur_item];
211 synth_printf("%s", name);
212 if (key_offsets[func] == 0) {
213 synth_printf(" %s\n", spk_msg_get(MSG_IS_UNASSIGNED));
214 return 1;
215 }
216 p_keys = key_data + key_offsets[func];
217 for (n = 0; p_keys[n]; n++) {
218 val = p_keys[n];
219 if (n > 0)
220 synth_printf("%s ", spk_msg_get(MSG_DISJUNCTION));
221 say_key(val);
222 }
223 return 1;
224 }
225