firka/flutter
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Fix a couple of strong mode issues. (#14070)

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* JSON.decode produces Map<String, dynamic> and List<dynamic>
objects. If a more tight type is required then object needs to
be converted explicitly (see dart-lang/sdk#31876);
* Completer<dynamic> produces Future<dynamic>. In Dart 2 it is
runtime error to assign Future<dynamic> to variable of type Future<T>;
This commit is contained in:
Vyacheslav Egorov 2018-01-13 09:18:12 +01:00 committed by GitHub
parent e11cf5c94c
commit 6e38b42919
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2 changed files with 9 additions and 5 deletions
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6
packages/flutter/lib/src/painting/image_resolution.dart
View File

@ -214,7 +214,11 @@ class AssetImage extends AssetBundleImageProvider {
if (json == null)
return null;
// TODO(ianh): JSON decoding really shouldn't be on the main thread.
final Map<String, List<String>> parsedManifest = JSON.decode(json);
final Map<String, dynamic> parsedJson = JSON.decode(json);
final Iterable<String> keys = parsedJson.keys;
final Map<String, List<String>> parsedManifest =
new Map<String, List<String>>.fromIterables(keys,
keys.map((String key) => new List<String>.from(parsedJson[key])));
// TODO(ianh): convert that data structure to the right types.
return new SynchronousFuture<Map<String, List<String>>>(parsedManifest);
}

8
packages/flutter/lib/src/services/asset_bundle.dart
View File

@ -179,10 +179,10 @@ abstract class CachingAssetBundle extends AssetBundle {
assert(parser != null);
if (_structuredDataCache.containsKey(key))
return _structuredDataCache[key];
Completer<dynamic> completer;
Future<dynamic> result;
Completer<T> completer;
Future<T> result;
loadString(key, cache: false).then<T>(parser).then<Null>((T value) {
result = new SynchronousFuture<dynamic>(value);
result = new SynchronousFuture<T>(value);
_structuredDataCache[key] = result;
if (completer != null) {
// We already returned from the loadStructuredData function, which means
@ -198,7 +198,7 @@ abstract class CachingAssetBundle extends AssetBundle {
}
// 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 = new Completer<dynamic>();
completer = new Completer<T>();
_structuredDataCache[key] = completer.future;
return completer.future;
}