@hideConstantImplementations by default. (#3576)

* @hideConstantImplementations by default.

* Remove more parts of the directive, but allow parsing.

* Revert some deletions.

* Fix generated.

* Flutter checks for replaced directives.

README.md

@@ -408,41 +408,6 @@ markdown link isn't linked).
 It's best to only inject HTML that is self-contained and doesn't depend upon
 other elements on the page, since those may change in future versions of Dartdoc.
 
-### Skipping constant rendering with one-line docs
-
-For some classes or libraries full of well-documented constants, showing the
-implementation on the enclosing `class` or `library` page can be distracting
-or even misleading.  To prevent the rendering of constant implementations,
-place the `{@hideConstantImplementations}` in the documentation comment for
-the enclosing context where the constant is defined.   For members of a class,
-place the directive in the class documentation where the constants are defined.
-For top level constants, place the directive in the library where the constants
-are defined.
-
-For example:
-
-```dart
-/// This is truly an amazing library.
-/// {@hideConstantImplementations}
-library my_library;
-
-/// This top level constant will not show its implementation.
-const a = 7;
-
-/// {@hideConstantImplementations}
-class A {
-  /// This constant will not show its implementation.
-  static const aConst = 12;
-}
-
-class B {
-  /// Despite the library directive, because this is a class
-  /// member and there is no hideConstantImplementations
-  /// directive on the class, we will show this implementation.
-  static const bConst = 27; 
-}
-```
-
 ### Auto including dependencies
 
 If `--auto-include-dependencies` flag is provided, dartdoc tries to automatically add

lib/src/generator/templates.runtime_renderers.dart

@@ -6121,13 +6121,6 @@ class _Renderer_Field extends RendererBase<Field> {
                         parent: r);
                   },
                 ),
-                'hasHideConstantImplementation': Property(
-                  getValue: (CT_ c) => c.hasHideConstantImplementation,
-                  renderVariable: (CT_ c, Property<CT_> self,
-                          List<String> remainingNames) =>
-                      self.renderSimpleVariable(c, remainingNames, 'bool'),
-                  getBool: (CT_ c) => c.hasHideConstantImplementation == true,
-                ),
                 'href': Property(
                   getValue: (CT_ c) => c.href,
                   renderVariable:
@@ -6820,13 +6813,6 @@ class _Renderer_GetterSetterCombo extends RendererBase<GetterSetterCombo> {
                       self.renderSimpleVariable(c, remainingNames, 'bool'),
                   getBool: (CT_ c) => c.hasGetterOrSetter == true,
                 ),
-                'hasHideConstantImplementation': Property(
-                  getValue: (CT_ c) => c.hasHideConstantImplementation,
-                  renderVariable: (CT_ c, Property<CT_> self,
-                          List<String> remainingNames) =>
-                      self.renderSimpleVariable(c, remainingNames, 'bool'),
-                  getBool: (CT_ c) => c.hasHideConstantImplementation == true,
-                ),
                 'hasNoGetterSetter': Property(
                   getValue: (CT_ c) => c.hasNoGetterSetter,
                   renderVariable: (CT_ c, Property<CT_> self,
@@ -15123,13 +15109,6 @@ class _Renderer_TopLevelVariable extends RendererBase<TopLevelVariable> {
                         parent: r);
                   },
                 ),
-                'hasHideConstantImplementation': Property(
-                  getValue: (CT_ c) => c.hasHideConstantImplementation,
-                  renderVariable: (CT_ c, Property<CT_> self,
-                          List<String> remainingNames) =>
-                      self.renderSimpleVariable(c, remainingNames, 'bool'),
-                  getBool: (CT_ c) => c.hasHideConstantImplementation == true,
-                ),
                 'href': Property(
                   getValue: (CT_ c) => c.href,
                   renderVariable:
@@ -16739,7 +16718,6 @@ const _invisibleGetters = {
     'hasExplicitSetter',
     'hasGetter',
     'hasGetterOrSetter',
-    'hasHideConstantImplementation',
     'hasNoGetterSetter',
     'hasParameters',
     'hasPublicGetter',

lib/src/model/documentation_comment.dart

@@ -13,16 +13,16 @@ import 'package:dartdoc/src/warnings.dart';
 import 'package:meta/meta.dart';
 import 'package:path/path.dart' as p show Context;
 
-final _templatePattern = RegExp(
-    r'[ ]*\{@template\s+([^\s}].*?)\}([^]+?)\{@endtemplate\}[ ]*(\n?)');
-final _htmlPattern = RegExp(
-    r'[ ]*\{@inject-html\s*\}([^]+?)\{@end-inject-html\}[ ]*\n?');
+final _templatePattern =
+    RegExp(r'[ ]*\{@template\s+([^\s}].*?)\}([^]+?)\{@endtemplate\}[ ]*(\n?)');
+final _htmlPattern =
+    RegExp(r'[ ]*\{@inject-html\s*\}([^]+?)\{@end-inject-html\}[ ]*\n?');
 
 /// Matches all tool directives (even some invalid ones). This is so
 /// we can give good error messages if the directive is malformed, instead of
 /// just silently emitting it as-is.
-final _basicToolPattern = RegExp(
-    r'[ ]*{@tool\s+([^\s}][^}]*)}\n?([^]+?)\n?{@end-tool}[ ]*\n?');
+final _basicToolPattern =
+    RegExp(r'[ ]*{@tool\s+([^\s}][^}]*)}\n?([^]+?)\n?{@end-tool}[ ]*\n?');
 
 final _examplePattern = RegExp(r'{@example\s+([^\s}][^}]*)}');
 

lib/src/model/field.dart

@@ -181,8 +181,4 @@ class Field extends ModelElement
 
   @override
   Inheritable? get overriddenElement => null;
-
-  @override
-  bool get hasHideConstantImplementation =>
-      definingEnclosingContainer.hasHideConstantImplementations;
 }

lib/src/model/getter_setter_combo.dart

@@ -58,12 +58,7 @@ mixin GetterSetterCombo on ModelElement {
   bool get isInherited;
 
   /// Whether this has a constant value which should be displayed.
-  bool get hasConstantValueForDisplay {
-    final element = this.element;
-    if (element is! ConstVariableElement) return false;
-    if (hasHideConstantImplementation) return false;
-    return element.constantInitializer != null;
-  }
+  bool get hasConstantValueForDisplay => false;
 
   Expression? get constantInitializer =>
       (element as ConstVariableElement).constantInitializer;
@@ -263,10 +258,6 @@ mixin GetterSetterCombo on ModelElement {
   // TODO(srawlins): This should be private.
   bool get writeOnly => hasPublicSetter && !hasPublicGetter;
 
-  /// True if the @hideConstantImplementations directive is present
-  /// in the defining enclosing element.
-  bool get hasHideConstantImplementation;
-
   @override
   late final Map<String, CommentReferable> referenceChildren = {
     if (hasParameters) ...parameters.explicitOnCollisionWith(this),

lib/src/model/top_level_variable.dart

@@ -82,8 +82,4 @@ class TopLevelVariable extends ModelElement
 
   @override
   Iterable<CommentReferable> get referenceParents => [definingLibrary];
-
-  @override
-  bool get hasHideConstantImplementation =>
-      definingLibrary.hasHideConstantImplementations;
 }

test/constant_values_test.dart

@@ -14,6 +14,7 @@ void main() {
     if (namedArgumentsAnywhereAllowed) {
       defineReflectiveTests(ConstantValuesWithNamedArgumentsAnywhereTest);
     }
+    defineReflectiveTests(HiddenConstantsTest);
   });
 }
 
@@ -179,3 +180,39 @@ const r = C(c: 1, d: 2, 3, 4);
         equals('<a href="$linkPrefix/C/C.html">C</a>(c: 1, d: 2, 3, 4)'));
   }
 }
+
+@reflectiveTest
+class HiddenConstantsTest extends DartdocTestBase {
+  @override
+  String get libraryName => 'hidden_constants';
+
+  void test_field() async {
+    var library = await bootPackageWithLibrary('''
+/// Some documentation.
+class A {
+  static const int aConst = 12;
+}
+''');
+    var aClass = library.classes.named('A');
+    var aConst = aClass.constantFields.named('aConst');
+    expect(aConst.hasConstantValueForDisplay, isFalse);
+    expect(aClass.documentation, equals('Some documentation.'));
+  }
+
+  void test_topLevel() async {
+    var library = await bootPackageWithLibrary('''
+class A {
+  static const int aConst = 12;
+}
+
+static const aTopLevelConst = 37;
+''', libraryPreamble: '''
+/// Some documentation.
+''');
+    var aConst = library.classes.named('A').constantFields.named('aConst');
+    expect(aConst.hasConstantValueForDisplay, isFalse);
+    var aTopLevelConst = library.constants.named('aTopLevelConst');
+    expect(aTopLevelConst.hasConstantValueForDisplay, isFalse);
+    expect(library.documentation, equals('Some documentation.'));
+  }
+}