Function ParseKeycode

src/hotkeys.cpp:119–139

* Parse a string representation of a keycode. * @param keystr Input. * @return A valid keycode or std::nullopt. */

 * @return A valid keycode or std::nullopt.
 */
static std::optional<uint16_t> ParseKeycode(std::string_view keystr)
{
	if (keystr.empty()) return std::nullopt;
	StringConsumer consumer{keystr};
	uint16_t keycode = 0;
	while (consumer.AnyBytesLeft()) {
		auto cur = consumer.ReadUntilChar('+', StringConsumer::SKIP_ONE_SEPARATOR);
		auto code = ParseCode(cur);
		if (!code.has_value()) return std::nullopt;
		if (*code & WKC_SPECIAL_KEYS) {
			/* Some completely wrong keycode we don't support. */
			if (*code & ~WKC_SPECIAL_KEYS) return std::nullopt;
			keycode |= *code;
		} else {
			/* Ignore the code if it has more then 1 letter. */
			if (keycode & ~WKC_SPECIAL_KEYS) return std::nullopt;
			keycode |= *code;
		}
	}
	return keycode;
}

/**
 * Parse a string to the keycodes it represents