String InputElement::validateInputMask(InputElementData& data, String& inputMask)
{
inputMask.replace("\\\\", "\\");
bool isValid = true;
bool hasWildcard = false;
unsigned escapeCharCount = 0;
unsigned maskLength = inputMask.length();
UChar formatCode;
for (unsigned i = 0; i < maskLength; ++i) {
formatCode = inputMask[i];
if (formatCodes().find(formatCode) == -1) {
if (formatCode == '*' || (isASCIIDigit(formatCode) && formatCode != '0')) {
// Validate codes which ends with '*f' or 'nf'
formatCode = inputMask[++i];
if ((i + 1 != maskLength) || formatCodes().find(formatCode) == -1) {
isValid = false;
break;
}
hasWildcard = true;
} else if (formatCode == '\\') {
// skip over the next mask character
++i;
++escapeCharCount;
} else {
isValid = false;
break;
}
}
}
if (!isValid)
return String();
// calculate the number of characters allowed to be entered by input mask
unsigned allowedLength = maskLength;
if (escapeCharCount)
allowedLength -= escapeCharCount;
if (hasWildcard) {
formatCode = inputMask[maskLength - 2];
if (formatCode == '*')
allowedLength = data.maxInputCharsAllowed();
else {
unsigned leftLen = String(&formatCode).toInt();
allowedLength = leftLen + allowedLength - 2;
}
}
if (allowedLength < data.maxInputCharsAllowed())
data.setMaxInputCharsAllowed(allowedLength);
return inputMask;
}
bool InputElement::isConformToInputMask(const InputElementData& data, UChar inChar, unsigned cursorPosition)
{
String inputFormatMask = data.inputFormatMask();
if (inputFormatMask.isEmpty() || inputFormatMask == "*M" || inputFormatMask == "*m")
return true;
if (cursorPosition >= data.maxInputCharsAllowed())
return false;
unsigned maskIndex = cursorPositionToMaskIndex(inputFormatMask, cursorPosition);
bool ok = true;
UChar mask = inputFormatMask[maskIndex];
// Match the inputed character with input mask
switch (mask) {
case 'A':
ok = !isASCIIDigit(inChar) && !isASCIILower(inChar) && isASCIIPrintable(inChar);
break;
case 'a':
ok = !isASCIIDigit(inChar) && !isASCIIUpper(inChar) && isASCIIPrintable(inChar);
break;
case 'N':
ok = isASCIIDigit(inChar);
break;
case 'n':
ok = !isASCIIAlpha(inChar) && isASCIIPrintable(inChar);
break;
case 'X':
ok = !isASCIILower(inChar) && isASCIIPrintable(inChar);
break;
case 'x':
ok = !isASCIIUpper(inChar) && isASCIIPrintable(inChar);
break;
case 'M':
case 'm':
ok = isASCIIPrintable(inChar);
break;
default:
ok = (mask == inChar);
break;
}
return ok;
}