remove unused suggestion builder

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

-// 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.suggestion.builder;
-
-import 'dart:async';
-
-import 'package:analysis_server/src/protocol_server.dart'
-    hide Element, ElementKind;
-import 'package:analysis_server/src/services/completion/dart/suggestion_builder.dart'
-    show createSuggestion;
-import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
-import 'package:analyzer/dart/element/element.dart';
-import 'package:analyzer/src/generated/ast.dart';
-
-export 'package:analysis_server/src/services/completion/dart/suggestion_builder.dart'
-    show createSuggestion;
-
-const String DYNAMIC = 'dynamic';
-
-/**
- * Call the given function with each non-null non-empty inherited type name
- * that is defined in the given class.
- */
-visitInheritedTypeNames(ClassDeclaration node, void inherited(String name)) {
-  void visit(TypeName type) {
-    if (type != null) {
-      Identifier id = type.name;
-      if (id != null) {
-        String name = id.name;
-        if (name != null && name.length > 0) {
-          inherited(name);
-        }
-      }
-    }
-  }
-
-  ExtendsClause extendsClause = node.extendsClause;
-  if (extendsClause != null) {
-    visit(extendsClause.superclass);
-  }
-  ImplementsClause implementsClause = node.implementsClause;
-  if (implementsClause != null) {
-    NodeList<TypeName> interfaces = implementsClause.interfaces;
-    if (interfaces != null) {
-      interfaces.forEach((TypeName type) {
-        visit(type);
-      });
-    }
-  }
-  WithClause withClause = node.withClause;
-  if (withClause != null) {
-    NodeList<TypeName> mixinTypes = withClause.mixinTypes;
-    if (mixinTypes != null) {
-      mixinTypes.forEach((TypeName type) {
-        visit(type);
-      });
-    }
-  }
-}
-
-/**
- * Starting with the given class node, traverse the inheritance hierarchy
- * calling the given functions with each non-null non-empty inherited class
- * declaration. For each locally defined declaration, call [localDeclaration].
- * For each class identifier in the hierarchy that is not defined locally,
- * call the [importedTypeName] function.
- */
-void visitInheritedTypes(ClassDeclaration node,
-    {void localDeclaration(ClassDeclaration classNode),
-    void importedTypeName(String typeName)}) {
-  CompilationUnit unit = node.getAncestor((p) => p is CompilationUnit);
-  List<ClassDeclaration> todo = new List<ClassDeclaration>();
-  todo.add(node);
-  Set<String> visited = new Set<String>();
-  while (todo.length > 0) {
-    node = todo.removeLast();
-    visitInheritedTypeNames(node, (String name) {
-      if (visited.add(name)) {
-        var classNode = unit.declarations.firstWhere((member) {
-          if (member is ClassDeclaration) {
-            SimpleIdentifier id = member.name;
-            if (id != null && id.name == name) {
-              return true;
-            }
-          }
-          return false;
-        }, orElse: () => null);
-        if (classNode is ClassDeclaration) {
-          if (localDeclaration != null) {
-            localDeclaration(classNode);
-          }
-          todo.add(classNode);
-        } else {
-          if (importedTypeName != null) {
-            importedTypeName(name);
-          }
-        }
-      }
-    });
-  }
-}
-
-/**
- * Common mixin for sharing behavior
- */
-abstract class ElementSuggestionBuilder {
-  /**
-   * Return the kind of suggestions that should be built.
-   */
-  CompletionSuggestionKind get kind;
-
-  /**
-   * Return the request on which the builder is operating.
-   */
-  DartCompletionRequest get request;
-
-  /**
-   * Add a suggestion based upon the given element.
-   */
-  void addSuggestion(Element element,
-      {String prefix, int relevance: DART_RELEVANCE_DEFAULT}) {
-    if (element.isPrivate) {
-      LibraryElement elementLibrary = element.library;
-      CompilationUnitElement unitElem = request.unit.element;
-      if (unitElem == null) {
-        return;
-      }
-      LibraryElement unitLibrary = unitElem.library;
-      if (elementLibrary != unitLibrary) {
-        return;
-      }
-    }
-    if (prefix == null && element.isSynthetic) {
-      if ((element is PropertyAccessorElement) ||
-          element is FieldElement && !_isSpecialEnumField(element)) {
-        return;
-      }
-    }
-    String completion = element.displayName;
-    if (prefix != null && prefix.length > 0) {
-      if (completion == null || completion.length <= 0) {
-        completion = prefix;
-      } else {
-        completion = '$prefix.$completion';
-      }
-    }
-    if (completion == null || completion.length <= 0) {
-      return;
-    }
-    CompletionSuggestion suggestion = createSuggestion(element,
-        completion: completion, kind: kind, relevance: relevance);
-    if (suggestion != null) {
-      request.addSuggestion(suggestion);
-    }
-  }
-
-  /**
-   * Determine if the given element is one of the synthetic enum accessors
-   * for which we should generate a suggestion.
-   */
-  bool _isSpecialEnumField(FieldElement element) {
-    Element parent = element.enclosingElement;
-    if (parent is ClassElement && parent.isEnum) {
-      if (element.name == 'values') {
-        return true;
-      }
-    }
-    return false;
-  }
-}
-
-/**
- * Common interface implemented by suggestion builders.
- */
-abstract class SuggestionBuilder {
-  /**
-   * Compute suggestions and return `true` if building is complete,
-   * or `false` if [computeFull] should be called.
-   */
-  bool computeFast(AstNode node);
-
-  /**
-   * Return a future that computes the suggestions given a fully resolved AST.
-   * The future returns `true` if suggestions were added, else `false`.
-   */
-  Future<bool> computeFull(AstNode node);
-}