mirror of https://gitee.com/openkylin/linux.git
210 lines
5.4 KiB
C
210 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/* speakup_keyhelp.c
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* help module for speakup
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*
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*written by David Borowski.
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*
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* Copyright (C) 2003 David Borowski.
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*/
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#include <linux/keyboard.h>
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#include "spk_priv.h"
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#include "speakup.h"
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#define MAXFUNCS 130
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#define MAXKEYS 256
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static const int num_key_names = MSG_KEYNAMES_END - MSG_KEYNAMES_START + 1;
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static u_short key_offsets[MAXFUNCS], key_data[MAXKEYS];
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static u_short masks[] = { 32, 16, 8, 4, 2, 1 };
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static short letter_offsets[26] = {
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1, -1, -1, -1, -1, -1, -1,
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-1, -1 };
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static u_char funcvals[] = {
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ATTRIB_BLEEP_DEC, ATTRIB_BLEEP_INC, BLEEPS_DEC, BLEEPS_INC,
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SAY_FIRST_CHAR, SAY_LAST_CHAR, SAY_CHAR, SAY_CHAR_NUM,
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SAY_NEXT_CHAR, SAY_PHONETIC_CHAR, SAY_PREV_CHAR, SPEAKUP_PARKED,
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SPEAKUP_CUT, EDIT_DELIM, EDIT_EXNUM, EDIT_MOST,
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EDIT_REPEAT, EDIT_SOME, SPEAKUP_GOTO, BOTTOM_EDGE,
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LEFT_EDGE, RIGHT_EDGE, TOP_EDGE, SPEAKUP_HELP,
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SAY_LINE, SAY_NEXT_LINE, SAY_PREV_LINE, SAY_LINE_INDENT,
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SPEAKUP_PASTE, PITCH_DEC, PITCH_INC, PUNCT_DEC,
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PUNCT_INC, PUNC_LEVEL_DEC, PUNC_LEVEL_INC, SPEAKUP_QUIET,
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RATE_DEC, RATE_INC, READING_PUNC_DEC, READING_PUNC_INC,
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SAY_ATTRIBUTES, SAY_FROM_LEFT, SAY_FROM_TOP, SAY_POSITION,
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SAY_SCREEN, SAY_TO_BOTTOM, SAY_TO_RIGHT, SPK_KEY,
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SPK_LOCK, SPEAKUP_OFF, SPEECH_KILL, SPELL_DELAY_DEC,
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SPELL_DELAY_INC, SPELL_WORD, SPELL_PHONETIC, TONE_DEC,
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TONE_INC, VOICE_DEC, VOICE_INC, VOL_DEC,
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VOL_INC, CLEAR_WIN, SAY_WIN, SET_WIN,
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ENABLE_WIN, SAY_WORD, SAY_NEXT_WORD, SAY_PREV_WORD, 0
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};
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static u_char *state_tbl;
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static int cur_item, nstates;
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static void build_key_data(void)
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{
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u_char *kp, counters[MAXFUNCS], ch, ch1;
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u_short *p_key, key;
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int i, offset = 1;
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nstates = (int)(state_tbl[-1]);
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memset(counters, 0, sizeof(counters));
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memset(key_offsets, 0, sizeof(key_offsets));
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kp = state_tbl + nstates + 1;
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while (*kp++) {
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/* count occurrences of each function */
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for (i = 0; i < nstates; i++, kp++) {
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if (!*kp)
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continue;
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if ((state_tbl[i] & 16) != 0 && *kp == SPK_KEY)
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continue;
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counters[*kp]++;
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}
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}
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for (i = 0; i < MAXFUNCS; i++) {
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if (counters[i] == 0)
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continue;
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key_offsets[i] = offset;
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offset += (counters[i] + 1);
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if (offset >= MAXKEYS)
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break;
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}
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/* leave counters set so high keycodes come first.
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* this is done so num pad and other extended keys maps are spoken before
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* the alpha with speakup type mapping.
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*/
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kp = state_tbl + nstates + 1;
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while ((ch = *kp++)) {
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for (i = 0; i < nstates; i++) {
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ch1 = *kp++;
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if (!ch1)
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continue;
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if ((state_tbl[i] & 16) != 0 && ch1 == SPK_KEY)
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continue;
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key = (state_tbl[i] << 8) + ch;
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counters[ch1]--;
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offset = key_offsets[ch1];
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if (!offset)
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continue;
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p_key = key_data + offset + counters[ch1];
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*p_key = key;
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}
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}
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}
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static void say_key(int key)
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{
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int i, state = key >> 8;
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key &= 0xff;
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for (i = 0; i < 6; i++) {
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if (state & masks[i])
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synth_printf(" %s", spk_msg_get(MSG_STATES_START + i));
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}
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if ((key > 0) && (key <= num_key_names))
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synth_printf(" %s\n",
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spk_msg_get(MSG_KEYNAMES_START + (key - 1)));
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}
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static int help_init(void)
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{
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char start = SPACE;
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int i;
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int num_funcs = MSG_FUNCNAMES_END - MSG_FUNCNAMES_START + 1;
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state_tbl = spk_our_keys[0] + SHIFT_TBL_SIZE + 2;
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for (i = 0; i < num_funcs; i++) {
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char *cur_funcname = spk_msg_get(MSG_FUNCNAMES_START + i);
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if (start == *cur_funcname)
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continue;
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start = *cur_funcname;
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letter_offsets[(start & 31) - 1] = i;
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}
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return 0;
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}
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int spk_handle_help(struct vc_data *vc, u_char type, u_char ch, u_short key)
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{
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int i, n;
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char *name;
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u_char func, *kp;
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u_short *p_keys, val;
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if (letter_offsets[0] == -1)
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help_init();
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if (type == KT_LATIN) {
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if (ch == SPACE) {
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spk_special_handler = NULL;
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synth_printf("%s\n", spk_msg_get(MSG_LEAVING_HELP));
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return 1;
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}
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ch |= 32; /* lower case */
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if (ch < 'a' || ch > 'z')
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return -1;
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if (letter_offsets[ch - 'a'] == -1) {
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synth_printf(spk_msg_get(MSG_NO_COMMAND), ch);
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synth_printf("\n");
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return 1;
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}
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cur_item = letter_offsets[ch - 'a'];
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} else if (type == KT_CUR) {
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if (ch == 0 &&
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(MSG_FUNCNAMES_START + cur_item + 1) <= MSG_FUNCNAMES_END)
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cur_item++;
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else if (ch == 3 && cur_item > 0)
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cur_item--;
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else
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return -1;
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} else if (type == KT_SPKUP && ch == SPEAKUP_HELP &&
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!spk_special_handler) {
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spk_special_handler = spk_handle_help;
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synth_printf("%s\n", spk_msg_get(MSG_HELP_INFO));
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build_key_data(); /* rebuild each time in case new mapping */
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return 1;
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} else {
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name = NULL;
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if ((type != KT_SPKUP) && (key > 0) && (key <= num_key_names)) {
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synth_printf("%s\n",
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spk_msg_get(MSG_KEYNAMES_START + key - 1));
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return 1;
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}
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for (i = 0; funcvals[i] != 0 && !name; i++) {
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if (ch == funcvals[i])
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name = spk_msg_get(MSG_FUNCNAMES_START + i);
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}
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if (!name)
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return -1;
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kp = spk_our_keys[key] + 1;
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for (i = 0; i < nstates; i++) {
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if (ch == kp[i])
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break;
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}
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key += (state_tbl[i] << 8);
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say_key(key);
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synth_printf(spk_msg_get(MSG_KEYDESC), name);
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synth_printf("\n");
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return 1;
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}
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name = spk_msg_get(MSG_FUNCNAMES_START + cur_item);
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func = funcvals[cur_item];
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synth_printf("%s", name);
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if (key_offsets[func] == 0) {
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synth_printf(" %s\n", spk_msg_get(MSG_IS_UNASSIGNED));
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return 1;
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}
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p_keys = key_data + key_offsets[func];
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for (n = 0; p_keys[n]; n++) {
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val = p_keys[n];
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if (n > 0)
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synth_printf("%s ", spk_msg_get(MSG_DISJUNCTION));
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say_key(val);
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}
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return 1;
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}
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