| // Copyright (c) 2022, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'package:analyzer/dart/element/type.dart'; |
| import 'package:analyzer/src/dart/constant/value.dart'; |
| import 'package:analyzer/src/dart/element/element.dart'; |
| import 'package:analyzer/src/summary2/reference.dart'; |
| import 'package:collection/collection.dart'; |
| |
| /// Prints [DartObjectImpl] as a tree, with values and fields. |
| class DartObjectPrinter { |
| final StringBuffer sink; |
| final String selfUriStr; |
| |
| String indent = ''; |
| |
| DartObjectPrinter({ |
| required this.sink, |
| required this.selfUriStr, |
| }); |
| |
| void write(DartObjectImpl? object) { |
| if (object != null) { |
| final type = object.type; |
| if (object.isUnknown) { |
| sink.write( |
| type.getDisplayString( |
| withNullability: true, |
| ), |
| ); |
| sink.writeln(' <unknown>'); |
| } else if (type.isDartCoreDouble) { |
| sink.write('double '); |
| sink.writeln(object.toDoubleValue()); |
| } else if (type.isDartCoreInt) { |
| sink.write('int '); |
| sink.writeln(object.toIntValue()); |
| } else if (type.isDartCoreString) { |
| sink.write('String '); |
| sink.writeln(object.toStringValue()); |
| } else if (type.isDartCoreList) { |
| type as InterfaceType; |
| sink.writeln('List'); |
| _withIndent(() { |
| _writelnWithIndent('elementType: ${type.typeArguments[0]}'); |
| final elements = object.toListValue()!; |
| if (elements.isNotEmpty) { |
| _writelnWithIndent('elements'); |
| _withIndent(() { |
| for (final element in elements) { |
| sink.write(indent); |
| write(element as DartObjectImpl); |
| } |
| }); |
| } |
| }); |
| } else if (object.isUserDefinedObject) { |
| final typeStr = type.getDisplayString(withNullability: true); |
| sink.writeln(typeStr); |
| _withIndent(() { |
| final fields = object.fields; |
| if (fields != null) { |
| final sortedFields = fields.entries.sortedBy((e) => e.key); |
| for (final entry in sortedFields) { |
| sink.write(indent); |
| sink.write('${entry.key}: '); |
| write(entry.value); |
| } |
| } |
| }); |
| } else { |
| throw UnimplementedError(); |
| } |
| _writeVariable(object); |
| } else { |
| sink.writeln('<null>'); |
| } |
| } |
| |
| String _referenceToString(Reference reference) { |
| final parent = reference.parent!; |
| if (parent.parent == null) { |
| final libraryUriStr = reference.name; |
| if (libraryUriStr == selfUriStr) { |
| return 'self'; |
| } |
| return libraryUriStr; |
| } |
| |
| // Ignore the unit, skip to the library. |
| if (parent.name == '@unit') { |
| return _referenceToString(parent.parent!); |
| } |
| |
| var name = reference.name; |
| if (name.isEmpty) { |
| name = '•'; |
| } |
| return '${_referenceToString(parent)}::$name'; |
| } |
| |
| void _withIndent(void Function() f) { |
| var savedIndent = indent; |
| indent = '$savedIndent '; |
| f(); |
| indent = savedIndent; |
| } |
| |
| void _writelnWithIndent(String line) { |
| sink.write(indent); |
| sink.writeln(line); |
| } |
| |
| void _writeVariable(DartObjectImpl object) { |
| final variable = object.variable; |
| if (variable is VariableElementImpl) { |
| _withIndent(() { |
| final reference = variable.reference!; |
| final referenceStr = _referenceToString(reference); |
| _writelnWithIndent('variable: $referenceStr'); |
| }); |
| } |
| } |
| } |