IEnumerator _loadCoroutine(string key, Completer completer, Isolate isolate)
{
var url = new Uri(key);
using (var www = UnityWebRequest.Get(url)) {
if (headers != null)
{
foreach (var header in headers)
{
www.SetRequestHeader(header.Key, header.Value);
}
}
yield return(www.SendWebRequest());
if (www.isNetworkError || www.isHttpError)
{
completer.completeError(new Exception($"Failed to load from url \"{url}\": {www.error}"));
yield break;
}
var data = www.downloadHandler.data;
using (Isolate.getScope(isolate)) {
completer.complete(data);
}
}
}
IEnumerator _loadCoroutine(string key, Completer completer, Isolate isolate)
{
var url = _urlFromKey(key);
using (var www = UnityWebRequest.Get(url)) {
if (headers != null)
{
foreach (var header in headers)
{
www.SetRequestHeader(header.Key, header.Value);
}
}
yield return(www.SendWebRequest());
if (www.isNetworkError || www.isHttpError)
{
completer.completeError(new UIWidgetsError(new List <DiagnosticsNode>()
{
new ErrorSummary($"Unable to load asset: {key}"),
new StringProperty("HTTP status code", www.error)
}));
yield break;
}
var data = www.downloadHandler.data;
using (Isolate.getScope(isolate)) {
completer.complete(data);
}
}
}
public override void dispose()
{
D.assert(!_transitionCompleter.isCompleted, () => $"Cannot dispose a {GetType()} twice.");
_controller?.dispose();
_transitionCompleter.complete(FutureOr.value(_result));
base.dispose();
}
void _show()
{
D.assert(_mode != _RefreshIndicatorMode.refresh);
D.assert(_mode != _RefreshIndicatorMode.snap);
Completer completer = Completer.create();
_pendingRefreshFuture = completer.future;
_mode = _RefreshIndicatorMode.snap;
_positionController
.animateTo(1.0f / RefreshIndicatorUtils._kDragSizeFactorLimit,
duration: RefreshIndicatorUtils._kIndicatorSnapDuration)
.then((value) => {
if (mounted && _mode == _RefreshIndicatorMode.snap)
{
D.assert(widget.onRefresh != null);
setState(() => { _mode = _RefreshIndicatorMode.refresh; });
Future refreshResult = widget.onRefresh();
D.assert(() => {
if (refreshResult == null)
{
UIWidgetsError.reportError(new UIWidgetsErrorDetails(
exception: new UIWidgetsError(
"The onRefresh callback returned null.\n" +
"The RefreshIndicator onRefresh callback must return a Promise."
),
context: new ErrorDescription("when calling onRefresh"),
library: "material library"
));
}
return(true);
});
if (refreshResult == null)
{
return;
}
refreshResult.whenComplete(() => {
if (mounted && _mode == _RefreshIndicatorMode.refresh)
{
completer.complete();
_dismiss(_RefreshIndicatorMode.done);
}
});
}
});
}
private Future _handleRefresh()
{
Completer completer = Completer.create();
Timer.create(new TimeSpan(0, 0, 0, 3), () => { completer.complete(); });
return(completer.future.then((_) =>
{
_scaffoldKey.currentState?.showSnackBar(new SnackBar(
content: new Text("Refresh complete"),
action: new SnackBarAction(
label: "RETRY",
onPressed: () => { _refreshIndicatorKey.currentState.show(); }
)
));
}));
}
Future <byte[]> _sendPlatformMessage(string channel, byte[] message)
{
Completer completer = Completer.create();
Window.instance.sendPlatformMessage(channel, message, (reply) => {
try {
completer.complete(FutureOr.value(reply));
}
catch (Exception exception) {
UIWidgetsError.reportError(new UIWidgetsErrorDetails(
exception: exception,
library: "services library",
context: new ErrorDescription("during a platform message response callback")
));
}
});
return(completer.future.to <byte[]>());
}
public override Future <T> loadStructuredData <T>(string key, Func <string, Future <T> > parser)
{
D.assert(key != null);
D.assert(parser != null);
if (_structuredDataCache.ContainsKey(key))
{
return(_structuredDataCache[key].to <T>());
}
Completer completer = null;
Future <T> result = null;
loadString(key, cache: false).then_ <T>(value => parser(value)).then_ <object>((T value) => {
result = new SynchronousFuture <T>(value);
_structuredDataCache[key] = result;
if (completer != null)
{
// We already returned from the loadStructuredData function, which means
// we are in the asynchronous mode. Pass the value to the completer. The
// completer's future is what we returned.
completer.complete(FutureOr.value(value));
}
return(FutureOr.nil);
});
if (result != null)
{
// The code above ran synchronously, and came up with an answer.
// Return the SynchronousFuture that we created above.
return(result);
}
// The code above hasn't yet run its "then" handler yet. Let's prepare a
// completer for it to use when it does run.
completer = Completer.create();
_structuredDataCache[key] = result = completer.future.to <T>();
return(result);
}
public override Future <_SizeAwareCacheKey> obtainKey(ImageConfiguration configuration)
{
Completer completer = null;
SynchronousFuture <_SizeAwareCacheKey> result = null;
imageProvider.obtainKey(configuration).then((object key) => {
// TODO: completer is always null?
if (completer == null)
{
result = new SynchronousFuture <_SizeAwareCacheKey>(new _SizeAwareCacheKey(key, width, height));
}
else
{
completer.complete(FutureOr.value(new _SizeAwareCacheKey(key, width, height)));
}
});
if (result != null)
{
return(result);
}
completer = Completer.create();
return(completer.future.to <_SizeAwareCacheKey>());
}
public override void dispose()
{
_completer.complete();
_controller.dispose();
base.dispose();
}