public async Task <TextRange> FindNextAsync(bool viaF3, bool searchBackward, string messageIfNotFound)
{
if (string.IsNullOrEmpty(txtLookFor.Text))
{
MessageBox.Show(this, _noSearchString.Text, Text, MessageBoxButtons.OK,
MessageBoxIcon.Information);
return(null);
}
_lastSearchWasBackward = searchBackward;
_search.LookFor = txtLookFor.Text;
_search.MatchCase = chkMatchCase.Checked;
_search.MatchWholeWordOnly = chkMatchWholeWord.Checked;
int startIdx = -1;
int currentIdx = -1;
TextRange range;
do
{
Caret caret = _editor.ActiveTextAreaControl.Caret;
if (viaF3 && _search.HasScanRegion &&
!Globals.IsInRange(caret.Offset, _search.BeginOffset, _search.EndOffset))
{
// user moved outside of the originally selected region
_search.ClearScanRegion();
UpdateTitleBar();
}
int startFrom = caret.Offset - (searchBackward ? 1 : 0);
if (startFrom == -1)
{
startFrom = _search.EndOffset;
}
range = _search.FindNext(startFrom, searchBackward, out _lastSearchLoopedAround);
if (range != null && (!_lastSearchLoopedAround || _fileLoader == null))
{
SelectResult(range);
}
else if (_fileLoader != null)
{
range = null;
if (currentIdx != -1 && startIdx == -1)
{
startIdx = currentIdx;
}
if (_fileLoader(searchBackward, true, out var fileIndex, out var loadFileContent))
{
currentIdx = fileIndex;
try
{
await loadFileContent;
}
catch (OperationCanceledException)
{
break;
}
}
else
{
break;
}
}
}while (range == null && startIdx != currentIdx && currentIdx != -1);
if (range == null && messageIfNotFound != null)
{
MessageBox.Show(this, messageIfNotFound, " ", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
return(range);
}