/// <summary>
/// returned async task function:
/// throws exception if there was error (f.e. android camera permissions)
/// OR returns not null scanned code
/// OR returns null if scanning was cancelled by user
/// </summary>
public static async Task <string> RequestScanQrNonValidatable(LayoutStrategy layout, CancellationToken canc)
{
var hndl = RequestScanQr(false, layout);
string result = null;
canc.Register(() => {
Logger.Debug(typeof(IawAppApi), "RequestScanQrNonValidatable() requesting cancellation");
hndl.CancelScanning();
});
while (true)
{
Logger.Debug(typeof(IawAppApi), "RequestScanQrNonValidatable() requesting next");
var v = await hndl.GetNext();
Logger.Debug(typeof(IawAppApi), "RequestScanQrNonValidatable() got ({0}; {1})", v.Item1, v.Item2);
if (v.Item1 == ScanResultType.Paused)
{
throw new Exception("unexpected pause");
}
if (v.Item1 == ScanResultType.Scanned)
{
result = v.Item2;
Logger.Debug(typeof(IawAppApi), "RequestScanQrNonValidatable() deferring result {0}", result);
}
if (v.Item1 == ScanResultType.Disposed)
{
Logger.Debug(typeof(IawAppApi), "RequestScanQrNonValidatable() returning deferred result {0}", result);
return(result);
}
}
}
public void requestScanQr(string webRequestId, bool askJsForValidation, LayoutStrategy layout)
{
var layoutAsJson = JsonConvert.SerializeObject(layout);
BridgeObjectUtil.CallMethodPlain(_impl, nameof(requestScanQr),
webRequestId,
askJsForValidation ? BridgeObjectUtil.True : BridgeObjectUtil.False,
layoutAsJson);
}
public static IScanResult RequestScanQr(bool pauseAfterBarcode, LayoutStrategy layout)
{
var impl = GetImpl();
if (impl == null)
{
Logger.Debug(typeof(IawAppApi), "has no proper IAWApp API");
return(new WindowPromptBasedScanResult(pauseAfterBarcode, layout));
}
return(new ScanResult(impl, pauseAfterBarcode, layout));
}
public WindowPromptBasedScanResult(bool pauseAfterBarcode, LayoutStrategy layout)
{
_pauseAfterBarcode = pauseAfterBarcode;
_layout = layout;
}
public ScanResult(IAWAppHostApi impl, bool pauseAfterBarcode, LayoutStrategy layout)
{
_impl = impl;
_layout = layout;
_pauseAfterBarcode = pauseAfterBarcode;
}
