[DAS] Fixes go to imports for annotations constructors

Fixes: #62258
Change-Id: Ia9c068ff7ea731953c91125aba92dd3e2f796184
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/468900
Reviewed-by: Brian Wilkerson <[email protected]>
Reviewed-by: Samuel Rawlins <[email protected]>
Commit-Queue: Brian Wilkerson <[email protected]>
Auto-Submit: Felipe Morschel <[email protected]>

Author: FMorschel

pkg/analysis_server/lib/src/lsp/handlers/custom/handler_imports.dart

@@ -86,6 +86,11 @@ class ImportsHandler
       var enclosingElement = element.enclosingElement;
       if (enclosingElement is ExtensionElement) {
         element = enclosingElement;
+      } else if (enclosingElement is InterfaceElement &&
+          node.parent is Annotation) {
+        // For annotations we need to reference the class element, not the
+        // constructor element.
+        element = enclosingElement;
       }
 
       var locations = _getImportLocations(library, unit, element, prefixName);

pkg/analysis_server/test/lsp/import_test.dart

@@ -30,6 +30,66 @@ class ImportTest extends AbstractLspAnalysisServerTest {
     return (uri: toUri(filePath), filePath: filePath, code: code);
   }
 
+  Future<void> test_annotationConstructor() async {
+    newFile(join(projectFolderPath, 'lib', 'other.dart'), '''
+class A {
+  const A();
+}
+''');
+    await _verifyGoToImports(
+      TestCode.parse('''
+[!import 'other.dart';!]
+
+@A^()
+void foo() {}
+'''),
+    );
+  }
+
+  Future<void> test_annotationConstructor_prefixed() async {
+    newFile(join(projectFolderPath, 'lib', 'other.dart'), '''
+class A {
+  const A();
+}
+''');
+    await _verifyGoToImports(
+      TestCode.parse('''
+[!import 'other.dart' as p;!]
+
+@p.A^()
+void foo() {}
+'''),
+    );
+  }
+
+  Future<void> test_annotationVariable() async {
+    newFile(join(projectFolderPath, 'lib', 'other.dart'), '''
+const value = 42;
+''');
+    await _verifyGoToImports(
+      TestCode.parse('''
+[!import 'other.dart';!]
+
+@value^
+void foo() {}
+'''),
+    );
+  }
+
+  Future<void> test_annotationVariable_prefixed() async {
+    newFile(join(projectFolderPath, 'lib', 'other.dart'), '''
+const value = 42;
+''');
+    await _verifyGoToImports(
+      TestCode.parse('''
+[!import 'other.dart' as p;!]
+
+@p.value^
+void foo() {}
+'''),
+    );
+  }
+
   Future<void> test_constant() async {
     await _verifyGoToImports(
       TestCode.parse('''