Function GetKeyboardLayout

src/osk_gui.cpp:352–384

* Retrieve keyboard layout from language string or (if set) config file. * Also check for invalid characters. */

 * Also check for invalid characters.
 */
void GetKeyboardLayout()
{
	std::string keyboard[2];
	std::string errormark[2]; // used for marking invalid chars
	bool has_error = false; // true when an invalid char is detected

	keyboard[0] = _keyboard_opt[0].empty() ? GetString(STR_OSK_KEYBOARD_LAYOUT) : _keyboard_opt[0];
	keyboard[1] = _keyboard_opt[1].empty() ? GetString(STR_OSK_KEYBOARD_LAYOUT_CAPS) : _keyboard_opt[1];

	for (uint j = 0; j < 2; j++) {
		StringConsumer consumer(keyboard[j]);
		for (uint i = 0; i < OSK_KEYBOARD_ENTRIES; i++) {
			/* Be lenient when the last characters are missing (is quite normal) */
			_keyboard[j][i] = consumer.AnyBytesLeft() ? consumer.ReadUtf8() : ' ';

			if (IsPrintable(_keyboard[j][i])) {
				errormark[j] += ' ';
			} else {
				has_error = true;
				errormark[j] += '^';
				_keyboard[j][i] = ' ';
			}
		}
	}

	if (has_error) {
		ShowInfo("The keyboard layout you selected contains invalid chars. Please check those chars marked with ^.");
		ShowInfo("Normal keyboard:  {}", keyboard[0]);
		ShowInfo("                  {}", errormark[0]);
		ShowInfo("Caps Lock:        {}", keyboard[1]);
		ShowInfo("                  {}", errormark[1]);
	}
}

/**
 * Show the on-screen keyboard (osk) associated with a given textbox