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A proper send_string() for the Unicode feature (#8155)

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Ryan 2020-02-24 10:27:25 +11:00 • committed by GitHub
parent 716c29881c
commit 371ff9dd6f
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3 changed files with 67 additions and 5 deletions
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49
quantum/process_keycode/process_unicode_common.c
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@ -178,6 +178,55 @@ void send_unicode_hex_string(const char *str) {
}
}
// Borrowed from https://nullprogram.com/blog/2017/10/06/
const char *decode_utf8(const char *str, int32_t *code_point) {
const char *next;
if (str[0] < 0x80) { // U+0000-007F
*code_point = str[0];
next = str + 1;
} else if ((str[0] & 0xE0) == 0xC0) { // U+0080-07FF
*code_point = ((int32_t)(str[0] & 0x1F) << 6) | ((int32_t)(str[1] & 0x3F) << 0);
next = str + 2;
} else if ((str[0] & 0xF0) == 0xE0) { // U+0800-FFFF
*code_point = ((int32_t)(str[0] & 0x0F) << 12) | ((int32_t)(str[1] & 0x3F) << 6) | ((int32_t)(str[2] & 0x3F) << 0);
next = str + 3;
} else if ((str[0] & 0xF8) == 0xF0 && (str[0] <= 0xF4)) { // U+10000-10FFFF
// Skip for now - register_hex() only takes a uint16
//*code_point = ((int32_t)(str[0] & 0x07) << 18) | ((int32_t)(str[1] & 0x3F) << 12) | ((int32_t)(str[2] & 0x3F) << 6) | ((int32_t)(str[3] & 0x3F) << 0);
*code_point = -1;
next = str + 4;
} else {
*code_point = -1;
next = str + 1;
}
// part of a UTF-16 surrogate pair - invalid
if (*code_point >= 0xD800 && *code_point <= 0xDFFF) {
*code_point = -1;
}
return next;
}
void send_unicode_string(const char *str) {
if (!str) {
return;
}
int32_t code_point = 0;
while (*str) {
str = decode_utf8(str, &code_point);
if (code_point >= 0) {
unicode_input_start();
register_hex(code_point);
unicode_input_finish();
}
}
}
bool process_unicode_common(uint16_t keycode, keyrecord_t *record) {
if (record->event.pressed) {
switch (keycode) {