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209 lines
5.4 KiB
209 lines
5.4 KiB
// 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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