private BidiRun subRun(int targetStartOffset, int targetEndOffset) {
assert targetStartOffset < endOffset;
assert targetEndOffset > startOffset;
if (targetStartOffset <= startOffset && targetEndOffset >= this.endOffset) {
return this;
}
int start = Math.max(startOffset, targetStartOffset);
int end = Math.min(endOffset, targetEndOffset);
BidiRun run = new BidiRun(level, start, end);
int offset = startOffset;
for (LineFragment fragment : fragments) {
if (end <= offset) break;
int endOffset = offset + fragment.getLength();
if (start < endOffset) {
run.fragments.add(
fragment.subFragment(
Math.max(start, offset) - offset, Math.min(end, endOffset) - offset));
}
offset = endOffset;
}
return run;
}
