Use curly_braces_in_flow_control_structures for foundation, gestures, painting, physics (#104610)

* Use `curly_braces_in_flow_control_structures` for `foundation`

* Use `curly_braces_in_flow_control_structures` for `gestures`

* Use `curly_braces_in_flow_control_structures` for `painting`

* Use `curly_braces_in_flow_control_structures` for `physics`

* fix comments

* remove trailing space

* fix TODO style

Author: guidezpl

packages/flutter/lib/src/foundation/_bitfield_io.dart

@@ -37,10 +37,11 @@ class BitField<T extends dynamic> implements bitfield.BitField<T> {
   void operator []=(T index, bool value) {
     final int intIndex = index.index as int;
     assert(intIndex < _length);
-    if (value)
+    if (value) {
       _bits = _bits | (1 << intIndex);
-    else
+    } else {
       _bits = _bits & ~(1 << intIndex);
+    }
   }
 
   @override

packages/flutter/lib/src/foundation/_platform_io.dart

@@ -23,12 +23,14 @@ platform.TargetPlatform get defaultTargetPlatform {
     result = platform.TargetPlatform.windows;
   }
   assert(() {
-    if (Platform.environment.containsKey('FLUTTER_TEST'))
+    if (Platform.environment.containsKey('FLUTTER_TEST')) {
       result = platform.TargetPlatform.android;
+    }
     return true;
   }());
-  if (platform.debugDefaultTargetPlatformOverride != null)
+  if (platform.debugDefaultTargetPlatformOverride != null) {
     result = platform.debugDefaultTargetPlatformOverride;
+  }
   if (result == null) {
     throw FlutterError(
       'Unknown platform.\n'

packages/flutter/lib/src/foundation/assertions.dart

@@ -622,8 +622,9 @@ class FlutterErrorDetails with Diagnosticable {
       longMessage = '  $exception';
     }
     longMessage = longMessage.trimRight();
-    if (longMessage.isEmpty)
+    if (longMessage.isEmpty) {
       longMessage = '  <no message available>';
+    }
     return longMessage;
   }
 
@@ -690,8 +691,9 @@ class FlutterErrorDetails with Diagnosticable {
         // strip out that header when we see it.
         final String prefix = '${exception.runtimeType}: ';
         String message = exceptionAsString();
-        if (message.startsWith(prefix))
+        if (message.startsWith(prefix)) {
           message = message.substring(prefix.length);
+        }
         properties.add(ErrorSummary(message));
       }
     }
@@ -1002,8 +1004,9 @@ class FlutterError extends Error with DiagnosticableTreeMixin implements Asserti
       return true;
     }());
     final bool reportError = isInDebugMode || details.silent != true; // could be null
-    if (!reportError && !forceReport)
+    if (!reportError && !forceReport) {
       return;
+    }
     if (_errorCount == 0 || forceReport) {
       // Diagnostics is only available in debug mode. In profile and release modes fallback to plain print.
       if (isInDebugMode) {
@@ -1115,8 +1118,9 @@ class FlutterError extends Error with DiagnosticableTreeMixin implements Asserti
     if (skipped == 1) {
       result.add('(elided one frame from ${where.single})');
     } else if (skipped > 1) {
-      if (where.length > 1)
+      if (where.length > 1) {
         where[where.length - 1] = 'and ${where.last}';
+      }
       if (where.length > 2) {
         result.add('(elided $skipped frames from ${where.join(", ")})');
       } else {
@@ -1190,8 +1194,9 @@ class FlutterError extends Error with DiagnosticableTreeMixin implements Asserti
 ///
 /// The `label` argument, if present, will be printed before the stack.
 void debugPrintStack({StackTrace? stackTrace, String? label, int? maxFrames}) {
-  if (label != null)
+  if (label != null) {
     debugPrint(label);
+  }
   if (stackTrace == null) {
     stackTrace = StackTrace.current;
   } else {
@@ -1208,8 +1213,9 @@ void debugPrintStack({StackTrace? stackTrace, String? label, int? maxFrames}) {
              line.contains('dart:sdk_internal');
     });
   }
-  if (maxFrames != null)
+  if (maxFrames != null) {
     lines = lines.take(maxFrames);
+  }
   debugPrint(FlutterError.defaultStackFilter(lines).join('\n'));
 }
 
@@ -1252,8 +1258,9 @@ class DiagnosticsStackTrace extends DiagnosticsBlock {
     StackTrace? stack,
     IterableFilter<String>? stackFilter,
   ) {
-    if (stack == null)
+    if (stack == null) {
       return <DiagnosticsNode>[];
+    }
     final IterableFilter<String> filter = stackFilter ?? FlutterError.defaultStackFilter;
     final Iterable<String> frames = filter('${FlutterError.demangleStackTrace(stack)}'.trimRight().split('\n'));
     return frames.map<DiagnosticsNode>(_createStackFrame).toList();

packages/flutter/lib/src/foundation/basic_types.dart

@@ -191,8 +191,9 @@ class CachingIterable<E> extends IterableBase<E> {
   }
 
   bool _fillNext() {
-    if (!_prefillIterator.moveNext())
+    if (!_prefillIterator.moveNext()) {
       return false;
+    }
     _results.add(_prefillIterator.current);
     return true;
   }
@@ -207,18 +208,21 @@ class _LazyListIterator<E> implements Iterator<E> {
   @override
   E get current {
     assert(_index >= 0); // called "current" before "moveNext()"
-    if (_index < 0 || _index == _owner._results.length)
+    if (_index < 0 || _index == _owner._results.length) {
       throw StateError('current can not be call after moveNext has returned false');
+    }
     return _owner._results[_index];
   }
 
   @override
   bool moveNext() {
-    if (_index >= _owner._results.length)
+    if (_index >= _owner._results.length) {
       return false;
+    }
     _index += 1;
-    if (_index == _owner._results.length)
+    if (_index == _owner._results.length) {
       return _owner._fillNext();
+    }
     return true;
   }
 }

packages/flutter/lib/src/foundation/binding.dart

@@ -827,8 +827,9 @@ abstract class BindingBase {
     developer.registerExtension(methodName, (String method, Map<String, String> parameters) async {
       assert(method == methodName);
       assert(() {
-        if (debugInstrumentationEnabled)
+        if (debugInstrumentationEnabled) {
           debugPrint('service extension method received: $method($parameters)');
+        }
         return true;
       }());
 

packages/flutter/lib/src/foundation/change_notifier.dart

@@ -225,20 +225,23 @@ class ChangeNotifier implements Listenable {
       final List<VoidCallback?> newListeners = List<VoidCallback?>.filled(_count, null);
 
       // Listeners before the index are at the same place.
-      for (int i = 0; i < index; i++)
+      for (int i = 0; i < index; i++) {
         newListeners[i] = _listeners[i];
+      }
 
       // Listeners after the index move towards the start of the list.
-      for (int i = index; i < _count; i++)
+      for (int i = index; i < _count; i++) {
         newListeners[i] = _listeners[i + 1];
+      }
 
       _listeners = newListeners;
     } else {
       // When there are more listeners than half the length of the list, we only
       // shift our listeners, so that we avoid to reallocate memory for the
       // whole list.
-      for (int i = index; i < _count; i++)
+      for (int i = index; i < _count; i++) {
         _listeners[i] = _listeners[i + 1];
+      }
       _listeners[_count] = null;
     }
   }
@@ -319,8 +322,9 @@ class ChangeNotifier implements Listenable {
   @pragma('vm:notify-debugger-on-exception')
   void notifyListeners() {
     assert(debugAssertNotDisposed());
-    if (_count == 0)
+    if (_count == 0) {
       return;
+    }
 
     // To make sure that listeners removed during this iteration are not called,
     // we set them to null, but we don't shrink the list right away.
@@ -439,8 +443,9 @@ class ValueNotifier<T> extends ChangeNotifier implements ValueListenable<T> {
   T get value => _value;
   T _value;
   set value(T newValue) {
-    if (_value == newValue)
+    if (_value == newValue) {
       return;
+    }
     _value = newValue;
     notifyListeners();
   }

packages/flutter/lib/src/foundation/collections.dart

@@ -20,15 +20,19 @@
 ///  * [listEquals], which does something similar for lists.
 ///  * [mapEquals], which does something similar for maps.
 bool setEquals<T>(Set<T>? a, Set<T>? b) {
-  if (a == null)
+  if (a == null) {
     return b == null;
-  if (b == null || a.length != b.length)
+  }
+  if (b == null || a.length != b.length) {
     return false;
-  if (identical(a, b))
+  }
+  if (identical(a, b)) {
     return true;
+  }
   for (final T value in a) {
-    if (!b.contains(value))
+    if (!b.contains(value)) {
       return false;
+    }
   }
   return true;
 }
@@ -49,15 +53,19 @@ bool setEquals<T>(Set<T>? a, Set<T>? b) {
 ///  * [setEquals], which does something similar for sets.
 ///  * [mapEquals], which does something similar for maps.
 bool listEquals<T>(List<T>? a, List<T>? b) {
-  if (a == null)
+  if (a == null) {
     return b == null;
-  if (b == null || a.length != b.length)
+  }
+  if (b == null || a.length != b.length) {
     return false;
-  if (identical(a, b))
+  }
+  if (identical(a, b)) {
     return true;
+  }
   for (int index = 0; index < a.length; index += 1) {
-    if (a[index] != b[index])
+    if (a[index] != b[index]) {
       return false;
+    }
   }
   return true;
 }
@@ -78,12 +86,15 @@ bool listEquals<T>(List<T>? a, List<T>? b) {
 ///  * [setEquals], which does something similar for sets.
 ///  * [listEquals], which does something similar for lists.
 bool mapEquals<T, U>(Map<T, U>? a, Map<T, U>? b) {
-  if (a == null)
+  if (a == null) {
     return b == null;
-  if (b == null || a.length != b.length)
+  }
+  if (b == null || a.length != b.length) {
     return false;
-  if (identical(a, b))
+  }
+  if (identical(a, b)) {
     return true;
+  }
   for (final T key in a.keys) {
     if (!b.containsKey(key) || b[key] != a[key]) {
       return false;

packages/flutter/lib/src/foundation/consolidate_response.dart

@@ -54,8 +54,9 @@ Future<Uint8List> consolidateHttpClientResponseBytes(
   final _OutputBuffer output = _OutputBuffer();
   ByteConversionSink sink = output;
   int? expectedContentLength = response.contentLength;
-  if (expectedContentLength == -1)
+  if (expectedContentLength == -1) {
     expectedContentLength = null;
+  }
   switch (response.compressionState) {
     case HttpClientResponseCompressionState.compressed:
       if (autoUncompress) {

packages/flutter/lib/src/foundation/debug.dart

@@ -26,8 +26,9 @@ bool debugAssertAllFoundationVarsUnset(String reason, { DebugPrintCallback debug
     if (debugPrint != debugPrintOverride ||
         debugDefaultTargetPlatformOverride != null ||
         debugDoublePrecision != null ||
-        debugBrightnessOverride != null)
+        debugBrightnessOverride != null) {
       throw FlutterError(reason);
+    }
     return true;
   }());
   return true;