/// <summary>
/// Implements <see cref="Transliterator.HandleTransliterate(IReplaceable, Position, bool)"/>.
/// </summary>
protected override void HandleTransliterate(IReplaceable text,
Position pos, bool isIncremental)
{
int allStart = pos.Start;
int allLimit = pos.Limit;
ScriptRunIterator it =
new ScriptRunIterator(text, pos.ContextStart, pos.ContextLimit);
while (it.Next())
{
// Ignore runs in the ante context
if (it.Limit <= allStart)
{
continue;
}
// Try to instantiate transliterator from it.scriptCode to
// our target or target/variant
Transliterator t = GetTransliterator(it.ScriptCode);
if (t == null)
{
// We have no transliterator. Do nothing, but keep
// pos.start up to date.
pos.Start = it.Limit;
continue;
}
// If the run end is before the transliteration limit, do
// a non-incremental transliteration. Otherwise do an
// incremental one.
bool incremental = isIncremental && (it.Limit >= allLimit);
pos.Start = Math.Max(allStart, it.Start);
pos.Limit = Math.Min(allLimit, it.Limit);
int limit = pos.Limit;
t.FilteredTransliterate(text, pos, incremental);
int delta = pos.Limit - limit;
allLimit += delta;
it.AdjustLimit(delta);
// We're done if we enter the post context
if (it.Limit >= allLimit)
{
break;
}
}
// Restore limit. pos.start is fine where the last transliterator
// left it, or at the end of the last run.
pos.Limit = allLimit;
}