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input: add new Unicode input mode

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This mode is activated through the new key-bindings.unicode-input and
search-bindings.unicode-input key bindings.

When active, the user can “build” a Unicode codepoint by typing its
hexadecimal value.

Note that there’s no visual feedback in this mode. This is
intentional. This mode is intended to be a fallback for users that
don’t use an IME.

Closes #1116
This commit is contained in:
Daniel Eklöf 2022-07-28 18:09:16 +02:00
parent fa2d9f8699
commit 8967dd9cfe
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GPG key ID: 5BBD4992C116573F
11 changed files with 167 additions and 2 deletions
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69
input.c
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@ -36,6 +36,7 @@
#include "spawn.h"
#include "terminal.h"
#include "tokenize.h"
#include "unicode-mode.h"
#include "url-mode.h"
#include "util.h"
#include "vt.h"
@ -416,6 +417,10 @@ execute_binding(struct seat *seat, struct terminal *term,
return true;
}
case BIND_ACTION_UNICODE_INPUT:
unicode_mode_activate(seat);
return true;
case BIND_ACTION_SELECT_BEGIN:
selection_start(
term, seat->mouse.col, seat->mouse.row, SELECTION_CHAR_WISE, false);
@ -1405,7 +1410,69 @@ key_press_release(struct seat *seat, struct terminal *term, uint32_t serial,
xassert(bindings != NULL);
if (pressed) {
if (term->is_searching) {
if (seat->unicode_mode.active) {
if (sym == XKB_KEY_Return ||
sym == XKB_KEY_space ||
sym == XKB_KEY_KP_Enter ||
sym == XKB_KEY_KP_Space)
{
char utf8[MB_CUR_MAX];
size_t chars = c32rtomb(
utf8, seat->unicode_mode.character, &(mbstate_t){0});
LOG_DBG("Unicode input: 0x%06x -> %.*s",
seat->unicode_mode.character, (int)chars, utf8);
if (chars != (size_t)-1) {
if (term->is_searching)
search_add_chars(term, utf8, chars);
else
term_to_slave(term, utf8, chars);
}
unicode_mode_deactivate(seat);
}
else if (sym == XKB_KEY_Escape ||
(seat->kbd.ctrl && (sym == XKB_KEY_c ||
sym == XKB_KEY_d ||
sym == XKB_KEY_g)))
{
unicode_mode_deactivate(seat);
}
else if (sym == XKB_KEY_BackSpace) {
if (seat->unicode_mode.count > 0) {
seat->unicode_mode.character >>= 4;
seat->unicode_mode.count--;
unicode_mode_updated(seat);
}
}
else if (seat->unicode_mode.count < 6) {
int digit = -1;
/* 0-9, a-f, A-F */
if (sym >= XKB_KEY_0 && sym <= XKB_KEY_9)
digit = sym - XKB_KEY_0;
else if (sym >= XKB_KEY_a && sym <= XKB_KEY_f)
digit = 0xa + (sym - XKB_KEY_a);
else if (sym >= XKB_KEY_A && sym <= XKB_KEY_F)
digit = 0xa + (sym - XKB_KEY_A);
if (digit >= 0) {
xassert(digit >= 0 && digit <= 0xf);
seat->unicode_mode.character <<= 4;
seat->unicode_mode.character |= digit;
seat->unicode_mode.count++;
unicode_mode_updated(seat);
}
}
return;
}
else if (term->is_searching) {
if (should_repeat)
start_repeater(seat, key);