extract TypeMemberContributor from prefixed element contributor

pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart

Index: pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
diff --git a/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart b/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
deleted file mode 100644
index feaa33e9533190d517e608e71ae4936419c19db4..0000000000000000000000000000000000000000
--- a/pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.dart
+++ /dev/null
@@ -1,369 +0,0 @@
-// Copyright (c) 2014, 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.
-
-library services.completion.contributor.dart.invocation;
-
-import 'dart:async';
-
-import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
-import 'package:analysis_server/src/services/completion/local_declaration_visitor.dart';
-import 'package:analysis_server/src/services/completion/local_suggestion_builder.dart'
-    hide createSuggestion;
-import 'package:analysis_server/src/services/completion/optype.dart';
-import 'package:analysis_server/src/services/completion/suggestion_builder.dart';
-import 'package:analysis_server/src/services/completion/suggestion_builder.dart'
-    show createSuggestion;
-import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/element.dart';
-
-import '../../protocol_server.dart'
-    show CompletionSuggestion, CompletionSuggestionKind;
-
-/**
- * A contributor for calculating invocation / access suggestions
- * `completion.getSuggestions` request results.
- */
-class PrefixedElementContributor extends DartCompletionContributor {
-  SuggestionBuilder builder;
-
-  @override
-  bool computeFast(DartCompletionRequest request) {
-    OpType optype = request.optype;
-    if (optype.isPrefixed) {
-      builder = request.target.containingNode
-          .accept(new _InvocationAstVisitor(request));
-      if (builder != null) {
-        return builder.computeFast(request.target.containingNode);
-      }
-    }
-
-    return true;
-  }
-
-  @override
-  Future<bool> computeFull(DartCompletionRequest request) {
-    if (builder != null) {
-      return builder.computeFull(request.target.containingNode);
-    }
-    return new Future.value(false);
-  }
-}
-
-class _ExpressionSuggestionBuilder implements SuggestionBuilder {
-  final DartCompletionRequest request;
-
-  _ExpressionSuggestionBuilder(this.request);
-
-  @override
-  bool computeFast(AstNode node) {
-    return false;
-  }
-
-  @override
-  Future<bool> computeFull(AstNode node) {
-    if (node is MethodInvocation) {
-      node = (node as MethodInvocation).realTarget;
-    } else if (node is PropertyAccess) {
-      node = (node as PropertyAccess).realTarget;
-    }
-    if (node is Identifier) {
-      Element elem = node.bestElement;
-      if (elem is ClassElement || elem is PrefixElement) {
-        elem.accept(new _PrefixedIdentifierSuggestionBuilder(request));
-        return new Future.value(true);
-      }
-    }
-    if (node is Expression) {
-      String containingMethodName;
-      bool isSuper = node is SuperExpression;
-      if (isSuper) {
-        MethodDeclaration containingMethod =
-            node.getAncestor((p) => p is MethodDeclaration);
-        if (containingMethod != null) {
-          SimpleIdentifier id = containingMethod.name;
-          if (id != null) {
-            containingMethodName = id.name;
-          }
-        }
-      }
-      InterfaceTypeSuggestionBuilder.suggestionsFor(request, node.bestType,
-          isSuper: isSuper, containingMethodName: containingMethodName);
-      return new Future.value(true);
-    }
-    return new Future.value(false);
-  }
-}
-
-/**
- * An [AstNode] vistor for determining which suggestion builder
- * should be used to build invocation/access suggestions.
- */
-class _InvocationAstVisitor extends GeneralizingAstVisitor<SuggestionBuilder> {
-  final DartCompletionRequest request;
-
-  _InvocationAstVisitor(this.request);
-
-  @override
-  SuggestionBuilder visitConstructorName(ConstructorName node) {
-    // some PrefixedIdentifier nodes are transformed into
-    // ConstructorName nodes during the resolution process.
-    return new _PrefixedIdentifierSuggestionBuilder(request);
-  }
-
-  @override
-  SuggestionBuilder visitMethodInvocation(MethodInvocation node) {
-    return new _ExpressionSuggestionBuilder(request);
-  }
-
-  @override
-  SuggestionBuilder visitNode(AstNode node) {
-    return null;
-  }
-
-  @override
-  SuggestionBuilder visitPrefixedIdentifier(PrefixedIdentifier node) {
-    // some PrefixedIdentifier nodes are transformed into
-    // ConstructorName nodes during the resolution process.
-    return new _PrefixedIdentifierSuggestionBuilder(request);
-  }
-
-  @override
-  SuggestionBuilder visitPropertyAccess(PropertyAccess node) {
-    return new _ExpressionSuggestionBuilder(request);
-  }
-}
-
-/**
- * An [AstVisitor] which looks for a declaration with the given name
- * and if found, tries to determine a type for that declaration.
- */
-class _LocalBestTypeVisitor extends LocalDeclarationVisitor {
-  /**
-   * The name for the declaration to be found.
-   */
-  final String targetName;
-
-  /**
-   * The best type for the found declaration,
-   * or `null` if no declaration found or failed to determine a type.
-   */
-  DartType typeFound;
-
-  /**
-   * Construct a new instance to search for a declaration
-   */
-  _LocalBestTypeVisitor(this.targetName, int offset) : super(offset);
-
-  @override
-  void declaredClass(ClassDeclaration declaration) {
-    if (declaration.name.name == targetName) {
-      // no type
-      finished();
-    }
-  }
-
-  @override
-  void declaredClassTypeAlias(ClassTypeAlias declaration) {
-    if (declaration.name.name == targetName) {
-      // no type
-      finished();
-    }
-  }
-
-  @override
-  void declaredField(FieldDeclaration fieldDecl, VariableDeclaration varDecl) {
-    if (varDecl.name.name == targetName) {
-      // Type provided by the element in computeFull above
-      finished();
-    }
-  }
-
-  @override
-  void declaredFunction(FunctionDeclaration declaration) {
-    if (declaration.name.name == targetName) {
-      TypeName typeName = declaration.returnType;
-      if (typeName != null) {
-        typeFound = typeName.type;
-      }
-      finished();
-    }
-  }
-
-  @override
-  void declaredFunctionTypeAlias(FunctionTypeAlias declaration) {
-    if (declaration.name.name == targetName) {
-      TypeName typeName = declaration.returnType;
-      if (typeName != null) {
-        typeFound = typeName.type;
-      }
-      finished();
-    }
-  }
-
-  @override
-  void declaredLabel(Label label, bool isCaseLabel) {
-    if (label.label.name == targetName) {
-      // no type
-      finished();
-    }
-  }
-
-  @override
-  void declaredLocalVar(SimpleIdentifier name, TypeName type) {
-    if (name.name == targetName) {
-      typeFound = name.bestType;
-      finished();
-    }
-  }
-
-  @override
-  void declaredMethod(MethodDeclaration declaration) {
-    if (declaration.name.name == targetName) {
-      TypeName typeName = declaration.returnType;
-      if (typeName != null) {
-        typeFound = typeName.type;
-      }
-      finished();
-    }
-  }
-
-  @override
-  void declaredParam(SimpleIdentifier name, TypeName type) {
-    if (name.name == targetName) {
-      // Type provided by the element in computeFull above
-      finished();
-    }
-  }
-
-  @override
-  void declaredTopLevelVar(
-      VariableDeclarationList varList, VariableDeclaration varDecl) {
-    if (varDecl.name.name == targetName) {
-      // Type provided by the element in computeFull above
-      finished();
-    }
-  }
-}
-
-/**
- * An [Element] visitor for determining the appropriate invocation/access
- * suggestions based upon the element for which the completion is requested.
- */
-class _PrefixedIdentifierSuggestionBuilder
-    extends GeneralizingElementVisitor<Future<bool>>
-    implements SuggestionBuilder {
-  final DartCompletionRequest request;
-
-  _PrefixedIdentifierSuggestionBuilder(this.request);
-
-  @override
-  bool computeFast(AstNode node) {
-    return false;
-  }
-
-  @override
-  Future<bool> computeFull(AstNode node) {
-    if (node is PrefixedIdentifier) {
-      SimpleIdentifier prefix = node.prefix;
-      if (prefix != null) {
-        Element element = prefix.bestElement;
-        DartType type = prefix.bestType;
-        if (element is! ClassElement) {
-          if (type == null || type.isDynamic) {
-            //
-            // Given `g. int y = 0;`, the parser interprets `g` as a prefixed
-            // identifier with no type.
-            // If the user is requesting completions for `g`,
-            // then check for a function, getter, or similar with a type.
-            //
-            _LocalBestTypeVisitor visitor =
-                new _LocalBestTypeVisitor(prefix.name, request.offset);
-            if (visitor.visit(prefix)) {
-              type = visitor.typeFound;
-            }
-          }
-          if (type != null && !type.isDynamic) {
-            InterfaceTypeSuggestionBuilder.suggestionsFor(request, type);
-            return new Future.value(true);
-          }
-        }
-        if (element != null) {
-          return element.accept(this);
-        }
-      }
-    }
-    return new Future.value(false);
-  }
-
-  @override
-  Future<bool> visitClassElement(ClassElement element) {
-    if (element != null) {
-      InterfaceType type = element.type;
-      if (type != null) {
-        // Suggested by StaticMemberContributor
-        // StaticClassElementSuggestionBuilder.suggestionsFor(
-        //     request, type.element);
-      }
-    }
-    return new Future.value(false);
-  }
-
-  @override
-  Future<bool> visitElement(Element element) {
-    return new Future.value(false);
-  }
-
-  @override
-  Future<bool> visitPrefixElement(PrefixElement element) {
-    bool modified = false;
-
-    // Suggested by LibraryMemberContributor
-
-    // Find the import directive with the given prefix
-    // for (Directive directive in request.unit.directives) {
-    //   if (directive is ImportDirective) {
-    //     if (directive.prefix != null) {
-    //       if (directive.prefix.name == element.name) {
-    //         // Suggest elements from the imported library
-    //         LibraryElement library = directive.uriElement;
-    //         AstNode node = request.target.containingNode;
-    //         bool typesOnly = node.parent is TypeName;
-    //         bool instCreation =
-    //             typesOnly && node.parent.parent is ConstructorName;
-    //         LibraryElementSuggestionBuilder.suggestionsFor(
-    //             request,
-    //             CompletionSuggestionKind.INVOCATION,
-    //             library,
-    //             typesOnly,
-    //             instCreation);
-    //         modified = true;
-    //         if (directive.deferredKeyword != null) {
-    //           FunctionElement loadLibFunct = library.loadLibraryFunction;
-    //           request.addSuggestion(createSuggestion(loadLibFunct));
-    //         }
-    //       }
-    //     }
-    //   }
-    // }
-    return new Future.value(modified);
-  }
-
-  @override
-  Future<bool> visitPropertyAccessorElement(PropertyAccessorElement element) {
-    if (element != null) {
-      PropertyInducingElement elemVar = element.variable;
-      if (elemVar != null) {
-        InterfaceTypeSuggestionBuilder.suggestionsFor(request, elemVar.type);
-      }
-      return new Future.value(true);
-    }
-    return new Future.value(false);
-  }
-
-  @override
-  Future<bool> visitVariableElement(VariableElement element) {
-    InterfaceTypeSuggestionBuilder.suggestionsFor(request, element.type);
-    return new Future.value(true);
-  }
-}