Refactor how Object and Pragma are discovered and handled (#3929)

lib/src/generator/templates.runtime_renderers.dart

@@ -2885,6 +2885,13 @@ class _Renderer_Container extends RendererBase<Container> {
                         _render_Operator(e, ast, r.template, sink, parent: r));
                   },
                 ),
+                'isDartCoreObject': Property(
+                  getValue: (CT_ c) => c.isDartCoreObject,
+                  renderVariable: (CT_ c, Property<CT_> self,
+                          List<String> remainingNames) =>
+                      self.renderSimpleVariable(c, remainingNames, 'bool'),
+                  getBool: (CT_ c) => c.isDartCoreObject,
+                ),
                 'isEnum': Property(
                   getValue: (CT_ c) => c.isEnum,
                   renderVariable: (CT_ c, Property<CT_> self,
@@ -16371,6 +16378,7 @@ const _invisibleGetters = {
     'localPackages',
     'localPublicLibraries',
     'name',
+    'objectClass',
     'packageGraph',
     'packageMap',
     'packageMeta',
@@ -16383,8 +16391,7 @@ const _invisibleGetters = {
     'referenceParents',
     'resourceProvider',
     'runtimeType',
-    'sdkLibrarySources',
-    'specialClasses'
+    'sdkLibrarySources'
   },
   'PackageMeta': {
     'dir',

lib/src/model/class.dart

@@ -45,7 +45,11 @@ class Class extends InheritingContainer with Constructable, MixedInTypes {
 
   Class(this.element, Library library, PackageGraph packageGraph)
       : super(library, packageGraph) {
-    packageGraph.specialClasses.addSpecial(this);
+    if (element.name == 'Object' &&
+        library.element.name == 'dart.core' &&
+        package.name == 'Dart') {
+      packageGraph.objectClass = this;
+    }
   }
 
   @override

lib/src/model/container.dart

@@ -49,6 +49,10 @@ abstract class Container extends ModelElement
   /// Whether this is a mixin.
   bool get isMixin => element is MixinElement;
 
+  /// Whether this container represents the Object class from 'dart:core'.
+  bool get isDartCoreObject =>
+      element.name == 'Object' && element.library?.name == 'dart.core';
+
   /// The model elements of all of the members of this container, including
   /// declared and inherited ones.
   Iterable<ModelElement> get allModelElements => [

lib/src/model/inheritable.dart

@@ -7,7 +7,6 @@ import 'package:collection/collection.dart' show IterableExtension;
 import 'package:dartdoc/src/model/attribute.dart';
 import 'package:dartdoc/src/model/comment_referable.dart';
 import 'package:dartdoc/src/model/model.dart';
-import 'package:dartdoc/src/special_elements.dart';
 
 /// Mixin for subclasses of [ModelElement] representing elements that can be
 /// inherited from one class to another.
@@ -136,10 +135,9 @@ mixin Inheritable on ContainerMember {
     var inheritance = [
       ...(enclosingElement as InheritingContainer).inheritanceChain,
     ];
-    var object = packageGraph.specialClasses[SpecialClass.object]!;
 
     assert(
-        definingEnclosingContainer == object ||
+        definingEnclosingContainer.isDartCoreObject ||
             inheritance.contains(definingEnclosingContainer), () {
       var inheritanceDescriptions = inheritance
           .map((e) =>
@@ -153,8 +151,8 @@ mixin Inheritable on ContainerMember {
     }());
     // Unless the code explicitly extends dart:core's Object, we won't get
     // an entry here.  So add it.
-    if (inheritance.last != object) {
-      inheritance.add(object);
+    if (!inheritance.last.isDartCoreObject) {
+      inheritance.add(packageGraph.objectClass);
     }
     return inheritance;
   }

lib/src/model/mixin.dart

@@ -9,7 +9,6 @@ import 'package:dartdoc/src/model/comment_referable.dart';
 import 'package:dartdoc/src/model/kind.dart';
 import 'package:dartdoc/src/model/model.dart';
 import 'package:dartdoc/src/model_utils.dart' as model_utils;
-import 'package:dartdoc/src/special_elements.dart';
 import 'package:meta/meta.dart';
 
 class Mixin extends InheritingContainer {
@@ -20,8 +19,7 @@ class Mixin extends InheritingContainer {
     ...element.superclassConstraints
         .map((InterfaceType i) =>
             getTypeFor(i, library) as ParameterizedElementType)
-        .where((t) =>
-            t.modelElement != packageGraph.specialClasses[SpecialClass.object])
+        .where((t) => t.modelElement != packageGraph.objectClass)
   ];
 
   @override

lib/src/model/model_element.dart

@@ -14,7 +14,6 @@ import 'package:analyzer/source/line_info.dart';
 // ignore: implementation_imports
 import 'package:analyzer/src/dart/element/member.dart'
     show ExecutableMember, Member, ParameterMember;
-import 'package:collection/collection.dart';
 import 'package:dartdoc/src/dartdoc_options.dart';
 import 'package:dartdoc/src/model/annotation.dart';
 import 'package:dartdoc/src/model/attribute.dart';
@@ -27,7 +26,6 @@ import 'package:dartdoc/src/model_utils.dart';
 import 'package:dartdoc/src/render/parameter_renderer.dart';
 import 'package:dartdoc/src/runtime_stats.dart';
 import 'package:dartdoc/src/source_linker.dart';
-import 'package:dartdoc/src/special_elements.dart';
 import 'package:dartdoc/src/type_utils.dart';
 import 'package:dartdoc/src/warnings.dart';
 import 'package:meta/meta.dart';
@@ -385,10 +383,7 @@ abstract class ModelElement
   /// invalid code from analyzer's perspective, some are present in `sky_engine`
   /// (`@Native`) so we don't want to crash here.
   late final List<Annotation> annotations = element.metadata
-      .whereNot((m) =>
-          m.element == null ||
-          packageGraph.specialClasses[SpecialClass.pragma]!.element.constructors
-              .contains(m.element))
+      .where((m) => m.isVisibleAnnotation)
       .map((m) => Annotation(m, library, packageGraph))
       .toList(growable: false);
 
@@ -791,3 +786,19 @@ abstract class ModelElement
 
   String get linkedObjectType => _packageGraph.dartCoreObject;
 }
+
+extension on ElementAnnotation {
+  /// Whether this annotation should be displayed in documentation.
+  ///
+  /// At the moment, `pragma` is the only invisible annotation.
+  bool get isVisibleAnnotation {
+    if (element == null) return false;
+
+    if (element case ConstructorElement(:var enclosingElement3)) {
+      return !(enclosingElement3.name == 'pragma' &&
+          enclosingElement3.library.name == 'dart.core');
+    }
+
+    return true;
+  }
+}

lib/src/model/package_builder.dart

@@ -29,7 +29,6 @@ import 'package:dartdoc/src/package_config_provider.dart';
 import 'package:dartdoc/src/package_meta.dart'
     show PackageMeta, PackageMetaProvider;
 import 'package:dartdoc/src/runtime_stats.dart';
-import 'package:dartdoc/src/special_elements.dart';
 import 'package:meta/meta.dart';
 import 'package:path/path.dart' as p show Context;
 
@@ -479,13 +478,7 @@ class PubPackageBuilder implements PackageBuilder {
   /// Adds all libraries with documentable elements to
   /// [uninitializedPackageGraph].
   Future<void> _getLibraries(PackageGraph uninitializedPackageGraph) async {
-    var embedderSdk = _embedderSdk;
-    var findSpecialsSdk = switch (embedderSdk) {
-      EmbedderSdk(:var urlMappings) when urlMappings.isNotEmpty => embedderSdk,
-      _ => _sdk,
-    };
     var files = await _getFilesToDocument();
-    var specialFiles = specialLibraryFiles(findSpecialsSdk);
 
     logInfo('Discovering libraries...');
     var foundLibraries = <LibraryElement>{};
@@ -495,12 +488,7 @@ class PubPackageBuilder implements PackageBuilder {
       files,
     );
     _checkForMissingIncludedFiles(foundLibraries);
-    await _discoverLibraries(
-      uninitializedPackageGraph.addSpecialLibraryToGraph,
-      foundLibraries,
-      specialFiles.difference(files),
-      addingSpecials: true,
-    );
+    uninitializedPackageGraph.allLibrariesAdded = true;
   }
 
   /// Throws an exception if any configured-to-be-included files were not found

lib/src/model/package_graph.dart

@@ -26,7 +26,6 @@ import 'package:dartdoc/src/model/model.dart';
 import 'package:dartdoc/src/model_utils.dart' as utils;
 import 'package:dartdoc/src/package_meta.dart'
     show PackageMeta, PackageMetaProvider;
-import 'package:dartdoc/src/special_elements.dart';
 import 'package:dartdoc/src/tool_definition.dart';
 import 'package:dartdoc/src/tool_runner.dart';
 import 'package:dartdoc/src/warnings.dart';
@@ -118,29 +117,6 @@ class PackageGraph with CommentReferable, Nameable {
   bool _shouldIncludeLibrary(LibraryElement libraryElement) =>
       config.include.isEmpty || config.include.contains(libraryElement.name);
 
-  /// Adds [resolvedLibrary] as a special library to the package graph, which
-  /// adds the library to [_allLibraries], but does not add it to any [Package]'s
-  /// list of libraries.
-  ///
-  /// Call during initialization to add a library possibly containing
-  /// special/non-documented elements to this [PackageGraph].  Must be called
-  /// after any normal libraries.
-  void addSpecialLibraryToGraph(DartDocResolvedLibrary resolvedLibrary) {
-    allLibrariesAdded = true;
-    assert(!_localDocumentationBuilt);
-    final libraryElement = resolvedLibrary.element.library;
-    _allLibraries.putIfAbsent(
-      libraryElement.source.fullName,
-      () => Library.fromLibraryResult(
-        resolvedLibrary,
-        this,
-        Package.fromPackageMeta(
-            packageMetaProvider.fromElement(libraryElement, config.sdkDir)!,
-            packageGraph),
-      ),
-    );
-  }
-
   /// Call after all libraries are added.
   Future<void> initializePackageGraph() async {
     assert(!_localDocumentationBuilt);
@@ -170,9 +146,6 @@ class PackageGraph with CommentReferable, Nameable {
     }
     allImplementersAdded = true;
     allExtensionsAdded = true;
-
-    // We should have found all special classes by now.
-    specialClasses.assertSpecials();
   }
 
   /// Generate a list of futures for any docs that actually require precaching.
@@ -230,8 +203,8 @@ class PackageGraph with CommentReferable, Nameable {
   // more than once for them.
   final Map<Element, ModelNode> _modelNodes = {};
 
-  /// The collection of "special" classes for which we need some special access.
-  final specialClasses = SpecialClasses();
+  /// The Object class declared in the Dart SDK's 'dart:core' library.
+  late InheritingContainer objectClass;
 
   /// Populate's [_modelNodes] with elements in [resolvedLibrary].
   ///
@@ -706,14 +679,9 @@ class PackageGraph with CommentReferable, Nameable {
           ?.linkedName ??
       'Object';
 
-  /// The set of [Class] objects that are similar to 'pragma' in that we should
-  /// never count them as documentable annotations.
-  late final Set<Class> _invisibleAnnotations = {
-    if (specialClasses[SpecialClass.pragma] case var pragma?) pragma,
-  };
-
   bool isAnnotationVisible(Class class_) =>
-      !_invisibleAnnotations.contains(class_);
+      class_.element.name == 'pragma' &&
+      class_.element.library.name == 'dart.core';
 
   @override
   String toString() {

test/classes_test.dart

@@ -2,7 +2,6 @@
 // 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:dartdoc/src/special_elements.dart';
 import 'package:test/test.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
@@ -194,9 +193,8 @@ class C implements D {}
 class D implements Object {}
 ''');
 
-    var object = library.packageGraph.specialClasses[SpecialClass.object]!;
     var toString = library.classes.named('A').instanceMethods.named('toString');
-    expect(toString.canonicalEnclosingContainer, object);
+    expect(toString.canonicalEnclosingContainer!.isDartCoreObject, isTrue);
   }
 
   // TODO(srawlins): Test everything else about classes.

test/end2end/model_special_cases_test.dart

@@ -16,7 +16,6 @@ import 'package:dartdoc/src/model/model.dart';
 import 'package:dartdoc/src/model_utils.dart';
 import 'package:dartdoc/src/package_config_provider.dart';
 import 'package:dartdoc/src/package_meta.dart';
-import 'package:dartdoc/src/special_elements.dart';
 import 'package:html/parser.dart' as html;
 import 'package:test/test.dart';
 
@@ -412,8 +411,6 @@ void main() {
           htmlLibrary.classes.singleWhere((c) => c.name == 'EventTarget');
       var hashCode = eventTarget.instanceFields.wherePublic
           .singleWhere((f) => f.name == 'hashCode');
-      var objectModelElement =
-          sdkAsPackageGraph.specialClasses[SpecialClass.object];
       expect(
         eventTarget.superChain,
         contains(isA<ParameterizedElementType>()
@@ -429,7 +426,7 @@ void main() {
             "EventTarget appears to have an explicit override of 'hashCode', "
             'which makes this test case invalid.',
       );
-      expect(hashCode.canonicalEnclosingContainer, equals(objectModelElement));
+      expect(hashCode.canonicalEnclosingContainer!.isDartCoreObject, isTrue);
       expect(
           eventTarget.publicSuperChainReversed
               .any((et) => et.name == 'Interceptor'),