diff options
Diffstat (limited to 'drivers/accessibility/speakup/keyhelp.c')
| -rw-r--r-- | drivers/accessibility/speakup/keyhelp.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/drivers/accessibility/speakup/keyhelp.c b/drivers/accessibility/speakup/keyhelp.c new file mode 100644 index 000000000..822ceac83 --- /dev/null +++ b/drivers/accessibility/speakup/keyhelp.c @@ -0,0 +1,209 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* speakup_keyhelp.c + * help module for speakup + * + *written by David Borowski. + * + * Copyright (C) 2003 David Borowski. + */ + +#include <linux/keyboard.h> +#include "spk_priv.h" +#include "speakup.h" + +#define MAXFUNCS 130 +#define MAXKEYS 256 +static const int num_key_names = MSG_KEYNAMES_END - MSG_KEYNAMES_START + 1; +static u_short key_offsets[MAXFUNCS], key_data[MAXKEYS]; +static u_short masks[] = { 32, 16, 8, 4, 2, 1 }; + +static short letter_offsets[26] = { + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1, -1, -1, -1, -1, -1, -1, + -1, -1 }; + +static u_char funcvals[] = { + ATTRIB_BLEEP_DEC, ATTRIB_BLEEP_INC, BLEEPS_DEC, BLEEPS_INC, + SAY_FIRST_CHAR, SAY_LAST_CHAR, SAY_CHAR, SAY_CHAR_NUM, + SAY_NEXT_CHAR, SAY_PHONETIC_CHAR, SAY_PREV_CHAR, SPEAKUP_PARKED, + SPEAKUP_CUT, EDIT_DELIM, EDIT_EXNUM, EDIT_MOST, + EDIT_REPEAT, EDIT_SOME, SPEAKUP_GOTO, BOTTOM_EDGE, + LEFT_EDGE, RIGHT_EDGE, TOP_EDGE, SPEAKUP_HELP, + SAY_LINE, SAY_NEXT_LINE, SAY_PREV_LINE, SAY_LINE_INDENT, + SPEAKUP_PASTE, PITCH_DEC, PITCH_INC, PUNCT_DEC, + PUNCT_INC, PUNC_LEVEL_DEC, PUNC_LEVEL_INC, SPEAKUP_QUIET, + RATE_DEC, RATE_INC, READING_PUNC_DEC, READING_PUNC_INC, + SAY_ATTRIBUTES, SAY_FROM_LEFT, SAY_FROM_TOP, SAY_POSITION, + SAY_SCREEN, SAY_TO_BOTTOM, SAY_TO_RIGHT, SPK_KEY, + SPK_LOCK, SPEAKUP_OFF, SPEECH_KILL, SPELL_DELAY_DEC, + SPELL_DELAY_INC, SPELL_WORD, SPELL_PHONETIC, TONE_DEC, + TONE_INC, VOICE_DEC, VOICE_INC, VOL_DEC, + VOL_INC, CLEAR_WIN, SAY_WIN, SET_WIN, + ENABLE_WIN, SAY_WORD, SAY_NEXT_WORD, SAY_PREV_WORD, 0 +}; + +static u_char *state_tbl; +static int cur_item, nstates; + +static void build_key_data(void) +{ + u_char *kp, counters[MAXFUNCS], ch, ch1; + u_short *p_key, key; + int i, offset = 1; + + nstates = (int)(state_tbl[-1]); + memset(counters, 0, sizeof(counters)); + memset(key_offsets, 0, sizeof(key_offsets)); + kp = state_tbl + nstates + 1; + while (*kp++) { + /* count occurrences of each function */ + for (i = 0; i < nstates; i++, kp++) { + if (!*kp) + continue; + if ((state_tbl[i] & 16) != 0 && *kp == SPK_KEY) + continue; + counters[*kp]++; + } + } + for (i = 0; i < MAXFUNCS; i++) { + if (counters[i] == 0) + continue; + key_offsets[i] = offset; + offset += (counters[i] + 1); + if (offset >= MAXKEYS) + break; + } +/* leave counters set so high keycodes come first. + * this is done so num pad and other extended keys maps are spoken before + * the alpha with speakup type mapping. + */ + kp = state_tbl + nstates + 1; + while ((ch = *kp++)) { + for (i = 0; i < nstates; i++) { + ch1 = *kp++; + if (!ch1) + continue; + if ((state_tbl[i] & 16) != 0 && ch1 == SPK_KEY) + continue; + key = (state_tbl[i] << 8) + ch; + counters[ch1]--; + offset = key_offsets[ch1]; + if (!offset) + continue; + p_key = key_data + offset + counters[ch1]; + *p_key = key; + } + } +} + +static void say_key(int key) +{ + int i, state = key >> 8; + + key &= 0xff; + for (i = 0; i < 6; i++) { + if (state & masks[i]) + synth_printf(" %s", spk_msg_get(MSG_STATES_START + i)); + } + if ((key > 0) && (key <= num_key_names)) + synth_printf(" %s\n", + spk_msg_get(MSG_KEYNAMES_START + (key - 1))); +} + +static int help_init(void) +{ + char start = SPACE; + int i; + int num_funcs = MSG_FUNCNAMES_END - MSG_FUNCNAMES_START + 1; + + state_tbl = spk_our_keys[0] + SHIFT_TBL_SIZE + 2; + for (i = 0; i < num_funcs; i++) { + char *cur_funcname = spk_msg_get(MSG_FUNCNAMES_START + i); + + if (start == *cur_funcname) + continue; + start = *cur_funcname; + letter_offsets[(start & 31) - 1] = i; + } + return 0; +} + +int spk_handle_help(struct vc_data *vc, u_char type, u_char ch, u_short key) +{ + int i, n; + char *name; + u_char func, *kp; + u_short *p_keys, val; + + if (letter_offsets[0] == -1) + help_init(); + if (type == KT_LATIN) { + if (ch == SPACE) { + spk_special_handler = NULL; + synth_printf("%s\n", spk_msg_get(MSG_LEAVING_HELP)); + return 1; + } + ch |= 32; /* lower case */ + if (ch < 'a' || ch > 'z') + return -1; + if (letter_offsets[ch - 'a'] == -1) { + synth_printf(spk_msg_get(MSG_NO_COMMAND), ch); + synth_printf("\n"); + return 1; + } + cur_item = letter_offsets[ch - 'a']; + } else if (type == KT_CUR) { + if (ch == 0 && + (MSG_FUNCNAMES_START + cur_item + 1) <= MSG_FUNCNAMES_END) + cur_item++; + else if (ch == 3 && cur_item > 0) + cur_item--; + else + return -1; + } else if (type == KT_SPKUP && ch == SPEAKUP_HELP && + !spk_special_handler) { + spk_special_handler = spk_handle_help; + synth_printf("%s\n", spk_msg_get(MSG_HELP_INFO)); + build_key_data(); /* rebuild each time in case new mapping */ + return 1; + } else { + name = NULL; + if ((type != KT_SPKUP) && (key > 0) && (key <= num_key_names)) { + synth_printf("%s\n", + spk_msg_get(MSG_KEYNAMES_START + key - 1)); + return 1; + } + for (i = 0; funcvals[i] != 0 && !name; i++) { + if (ch == funcvals[i]) + name = spk_msg_get(MSG_FUNCNAMES_START + i); + } + if (!name) + return -1; + kp = spk_our_keys[key] + 1; + for (i = 0; i < nstates; i++) { + if (ch == kp[i]) + break; + } + key += (state_tbl[i] << 8); + say_key(key); + synth_printf(spk_msg_get(MSG_KEYDESC), name); + synth_printf("\n"); + return 1; + } + name = spk_msg_get(MSG_FUNCNAMES_START + cur_item); + func = funcvals[cur_item]; + synth_printf("%s", name); + if (key_offsets[func] == 0) { + synth_printf(" %s\n", spk_msg_get(MSG_IS_UNASSIGNED)); + return 1; + } + p_keys = key_data + key_offsets[func]; + for (n = 0; p_keys[n]; n++) { + val = p_keys[n]; + if (n > 0) + synth_printf("%s ", spk_msg_get(MSG_DISJUNCTION)); + say_key(val); + } + return 1; +} |