writeFlutterApi method

@override void writeFlutterApi(CppOptions generatorOptions, Root root, Indent indent, Api api, { required String dartPackageName, })

Writes a single Flutter Api to indent.

Implementation

@override
void writeFlutterApi(
  CppOptions generatorOptions,
  Root root,
  Indent indent,
  Api api, {
  required String dartPackageName,
}) {
  assert(api.location == ApiLocation.flutter);
  if (getCodecClasses(api, root).isNotEmpty) {
    _writeCodec(generatorOptions, root, indent, api);
  }
  const List<String> generatedMessages = <String>[
    ' Generated class from Pigeon that represents Flutter messages that can be called from C++.'
  ];
  addDocumentationComments(indent, api.documentationComments, _docCommentSpec,
      generatorComments: generatedMessages);
  indent.write('class ${api.name} ');
  indent.addScoped('{', '};', () {
    _writeAccessBlock(indent, _ClassAccess.public, () {
      _writeFunctionDeclaration(indent, api.name,
          parameters: <String>['flutter::BinaryMessenger* binary_messenger']);
      _writeFunctionDeclaration(indent, 'GetCodec',
          returnType: 'const flutter::StandardMessageCodec&', isStatic: true);
      for (final Method func in api.methods) {
        final HostDatatype returnType = getHostDatatype(func.returnType,
            root.classes, root.enums, _baseCppTypeForBuiltinDartType);
        addDocumentationComments(
            indent, func.documentationComments, _docCommentSpec);

        final Iterable<String> argTypes = func.arguments.map((NamedType arg) {
          final HostDatatype hostType = getFieldHostDatatype(
              arg, root.classes, root.enums, _baseCppTypeForBuiltinDartType);
          return _flutterApiArgumentType(hostType);
        });
        final Iterable<String> argNames =
            indexMap(func.arguments, _getArgumentName);
        final List<String> parameters = <String>[
          ...map2(argTypes, argNames, (String x, String y) => '$x $y'),
          ..._flutterApiCallbackParameters(returnType),
        ];
        _writeFunctionDeclaration(indent, _makeMethodName(func),
            returnType: _voidType, parameters: parameters);
      }
    });
    indent.addScoped(' private:', null, () {
      indent.writeln('flutter::BinaryMessenger* binary_messenger_;');
    });
  }, nestCount: 0);
  indent.newln();
}