private Pair<MutableTextRange, StringBuffer> getFragmentByRange(int start, final int length) {
final StringBuffer fragmentBuffer = new StringBuffer();
int end = start + length;
// restoring buffer and remove all subfragments from the list
int documentOffset = 0;
int effectiveOffset = 0;
Iterator<Pair<MutableTextRange, StringBuffer>> iterator = myAffectedFragments.iterator();
while (iterator.hasNext() && effectiveOffset <= end) {
final Pair<MutableTextRange, StringBuffer> pair = iterator.next();
final MutableTextRange range = pair.getFirst();
final StringBuffer buffer = pair.getSecond();
int effectiveFragmentEnd = range.getStartOffset() + buffer.length();
if (range.getStartOffset() <= start && effectiveFragmentEnd >= end) return pair;
if (effectiveFragmentEnd >= start) {
final int effectiveStart = Math.max(effectiveOffset, start);
if (range.getStartOffset() > start) {
fragmentBuffer.append(
myDocument.getCharsSequence(),
effectiveStart - effectiveOffset + documentOffset,
Math.min(range.getStartOffset(), end) - effectiveOffset + documentOffset);
}
if (end >= range.getStartOffset()) {
fragmentBuffer.append(buffer);
end =
end > effectiveFragmentEnd
? end - (buffer.length() - range.getLength())
: range.getEndOffset();
effectiveFragmentEnd = range.getEndOffset();
start = Math.min(start, range.getStartOffset());
iterator.remove();
}
}
documentOffset += range.getEndOffset() - effectiveOffset;
effectiveOffset = effectiveFragmentEnd;
}
if (effectiveOffset < end) {
final int effectiveStart = Math.max(effectiveOffset, start);
fragmentBuffer.append(
myDocument.getCharsSequence(),
effectiveStart - effectiveOffset + documentOffset,
end - effectiveOffset + documentOffset);
}
MutableTextRange newRange = new MutableTextRange(start, end);
final Pair<MutableTextRange, StringBuffer> pair =
new Pair<MutableTextRange, StringBuffer>(newRange, fragmentBuffer);
for (Pair<MutableTextRange, StringBuffer> affectedFragment : myAffectedFragments) {
MutableTextRange range = affectedFragment.getFirst();
assert end <= range.getStartOffset() || range.getEndOffset() <= start
: "Range :" + range + "; Added: " + newRange;
}
myAffectedFragments.add(pair);
return pair;
}
private static void doCommitTransaction(
@NotNull Document document, @NotNull DocumentChangeTransaction documentChangeTransaction) {
DocumentEx ex = (DocumentEx) document;
ex.suppressGuardedExceptions();
try {
boolean isReadOnly = !document.isWritable();
ex.setReadOnly(false);
final Set<Pair<MutableTextRange, StringBuffer>> affectedFragments =
documentChangeTransaction.getAffectedFragments();
for (final Pair<MutableTextRange, StringBuffer> pair : affectedFragments) {
final StringBuffer replaceBuffer = pair.getSecond();
final MutableTextRange range = pair.getFirst();
if (replaceBuffer.length() == 0) {
ex.deleteString(range.getStartOffset(), range.getEndOffset());
} else if (range.getLength() == 0) {
ex.insertString(range.getStartOffset(), replaceBuffer);
} else {
ex.replaceString(range.getStartOffset(), range.getEndOffset(), replaceBuffer);
}
}
ex.setReadOnly(isReadOnly);
// if(documentChangeTransaction.getChangeScope() != null) {
//
// LOG.assertTrue(document.getText().equals(documentChangeTransaction.getChangeScope().getText()),
// "Psi to document synchronization failed (send to IK)");
// }
} finally {
ex.unSuppressGuardedExceptions();
}
}