private void shapeContextually(char[] text, int start, int count, Range ctxKey) {
// if we don't support the specified context, then don't shape.
if (ctxKey == null || !rangeSet.contains(ctxKey)) {
ctxKey = Range.EUROPEAN;
}
Range lastKey = ctxKey;
int base = ctxKey.getDigitBase();
char minDigit = (char) ('0' + ctxKey.getNumericBase());
final int end = start + count;
for (int i = start; i < end; ++i) {
char c = text[i];
if (c >= minDigit && c <= '9') {
text[i] = (char) (c + base);
continue;
}
if (isStrongDirectional(c)) {
ctxKey = rangeForCodePoint(c);
if (ctxKey != lastKey) {
lastKey = ctxKey;
base = ctxKey.getDigitBase();
minDigit = (char) ('0' + ctxKey.getNumericBase());
}
}
}
}
/** Perform non-contextual shaping. */
private void shapeNonContextually(char[] text, int start, int count) {
int base;
char minDigit = '0';
if (shapingRange != null) {
base = shapingRange.getDigitBase();
minDigit += shapingRange.getNumericBase();
} else {
base = bases[key];
if (key == ETHIOPIC_KEY) {
minDigit++; // Ethiopic doesn't use decimal zero
}
}
for (int i = start, e = start + count; i < e; ++i) {
char c = text[i];
if (c >= minDigit && c <= '\u0039') {
text[i] = (char) (c + base);
}
}
}