C# EventDeclaration类代码示例

        protected void EmitEventAccessor(EventDeclaration e, VariableInitializer evtVar, bool add)
        {
            string name = evtVar.Name;

            this.Write(add ? "add" : "remove", name, " : ");
            this.WriteFunction();
            this.WriteOpenParentheses();
            this.Write("value");
            this.WriteCloseParentheses();
            this.WriteSpace();
            this.BeginBlock();
            this.WriteThis();
            this.WriteDot();
            this.Write(this.Emitter.GetEntityName(e));
            this.Write(" = ");
            this.Write(Bridge.Translator.Emitter.ROOT, ".", add ? Bridge.Translator.Emitter.DELEGATE_COMBINE : Bridge.Translator.Emitter.DELEGATE_REMOVE);
            this.WriteOpenParentheses();
            this.WriteThis();
            this.WriteDot();
            this.Write(this.Emitter.GetEntityName(e));
            this.WriteComma();
            this.WriteSpace();
            this.Write("value");
            this.WriteCloseParentheses();
            this.WriteSemiColon();
            this.WriteNewLine();
            this.EndBlock();
        }

		/// <summary>
		/// Adds the elements of an array to the end of this EventDeclarationCollection.
		/// </summary>
		/// <param name="items">
		/// The array whose elements are to be added to the end of this EventDeclarationCollection.
		/// </param>
		public virtual void AddRange(EventDeclaration[] items)
		{
			foreach (EventDeclaration item in items)
			{
				this.List.Add(item);
			}
		}

        public EventReferenceExpression(Expression target,EventDeclaration _event)
        {
            if (target==null)
                throw new ArgumentNullException("target");
            if (_event==null)
                throw new ArgumentNullException("_event");

            this.target = target;
            this.declaringEvent = _event;
        }

        public static OverloadsCollection Create(IEmitter emitter, EventDeclaration eventDeclaration)
        {
            string key = eventDeclaration.GetHashCode().ToString();
            if (emitter.OverloadsCache.ContainsKey(key))
            {
                return emitter.OverloadsCache[key];
            }

            return new OverloadsCollection(emitter, eventDeclaration);
        }

		public static MethodDeclaration CreateEventInvocator (RefactoringContext context, TypeDeclaration declaringType, EventDeclaration eventDeclaration, VariableInitializer initializer, IMethod invokeMethod, bool useExplictType)
		{
			bool hasSenderParam = false;
			IEnumerable<IParameter> pars = invokeMethod.Parameters;
			if (invokeMethod.Parameters.Any()) {
				var first = invokeMethod.Parameters [0];
				if (first.Name == "sender" /*&& first.Type == "System.Object"*/) {
					hasSenderParam = true;
					pars = invokeMethod.Parameters.Skip(1);
				}
			}
			const string handlerName = "handler";

			var arguments = new List<Expression>();
			if (hasSenderParam)
				arguments.Add(eventDeclaration.HasModifier (Modifiers.Static) ? (Expression)new PrimitiveExpression (null) : new ThisReferenceExpression());
			bool useThisMemberReference = false;
			foreach (var par in pars) {
				arguments.Add(new IdentifierExpression(par.Name));
				useThisMemberReference |= par.Name == initializer.Name;
			}
			var proposedHandlerName = GetNameProposal(initializer);
			var modifiers = eventDeclaration.HasModifier(Modifiers.Static) ? Modifiers.Static : Modifiers.Protected | Modifiers.Virtual;
			if (declaringType.HasModifier (Modifiers.Sealed)) {
				modifiers = Modifiers.None;
			}
			var methodDeclaration = new MethodDeclaration {
				Name = proposedHandlerName,
				ReturnType = new PrimitiveType ("void"),
				Modifiers = modifiers,
				Body = new BlockStatement {
					new VariableDeclarationStatement (
						useExplictType ? eventDeclaration.ReturnType.Clone () : new PrimitiveType ("var"), handlerName, 
						useThisMemberReference ? 
						(Expression)new MemberReferenceExpression (new ThisReferenceExpression (), initializer.Name) 
						: new IdentifierExpression (initializer.Name)
						),
					new IfElseStatement {
						Condition = new BinaryOperatorExpression (new IdentifierExpression (handlerName), BinaryOperatorType.InEquality, new PrimitiveExpression (null)),
						TrueStatement = new InvocationExpression (new IdentifierExpression (handlerName), arguments)
					}
				}
			};

			foreach (var par in pars) {
				var typeName = context.CreateShortType(par.Type);
				var decl = new ParameterDeclaration(typeName, par.Name);
				methodDeclaration.Parameters.Add(decl);
			}
			return methodDeclaration;
		}

 private OverloadsCollection(IEmitter emitter, EventDeclaration eventDeclaration)
 {
     this.Emitter = emitter;
     this.Name = emitter.GetEventName(eventDeclaration);
     this.JsName = this.Emitter.GetEntityName(eventDeclaration, false, true);
     this.Inherit = !eventDeclaration.HasModifier(Modifiers.Static);
     this.Static = eventDeclaration.HasModifier(Modifiers.Static);
     this.CancelChangeCase = true;
     this.Member = this.FindMember(eventDeclaration);
     this.TypeDefinition = this.Member.DeclaringTypeDefinition;
     this.Type = this.Member.DeclaringType;
     this.InitMembers();
     this.Emitter.OverloadsCache[eventDeclaration.GetHashCode().ToString()] = this;
 }

		public override object VisitEventDeclaration(EventDeclaration eventDeclaration, object data)
		{
			if (!eventDeclaration.HasAddRegion && !eventDeclaration.HasRaiseRegion && !eventDeclaration.HasRemoveRegion) {
				if (eventDeclaration.TypeReference.IsNull) {
					DelegateDeclaration dd = new DelegateDeclaration(eventDeclaration.Modifier, null);
					dd.Name = eventDeclaration.Name + "EventHandler";
					dd.Parameters = eventDeclaration.Parameters;
					dd.ReturnType = new TypeReference("System.Void", true);
					dd.Parent = eventDeclaration.Parent;
					eventDeclaration.Parameters = null;
					InsertAfterSibling(eventDeclaration, dd);
					eventDeclaration.TypeReference = new TypeReference(dd.Name);
				}
			}
			return base.VisitEventDeclaration(eventDeclaration, data);
		}

 protected void IntroduceEvent(TransformationContext context, TypeDefDeclaration type, EventDeclaration theEvent)
 {
     var fieldRef = type.FindField(theEvent.Name);
     FieldDefDeclaration field;
     if(fieldRef == null) {
         field = new FieldDefDeclaration {
             Attributes = FieldAttributes.Private,
             Name = theEvent.Name,
             FieldType = theEvent.EventType,
         };
         type.Fields.Add(field);
     } else {
         field = fieldRef.Field;
     }
     var addOn = theEvent.GetAccessor(MethodSemantics.AddOn);
     if (addOn == null) {
         theEvent.ImplementAddOn(type, field, AspectInfrastructureTask.WeavingHelper);
     }
     var removeOn = theEvent.GetAccessor(MethodSemantics.RemoveOn);
     if (removeOn == null) {
         theEvent.ImplementRemoveOn(type, field, AspectInfrastructureTask.WeavingHelper);
     }
 }

        public virtual string GetEventName(EventDeclaration evt)
        {
            if (!string.IsNullOrEmpty(evt.Name))
            {
                return evt.Name;
            }

            if (evt.Variables.Count > 0)
            {
                return evt.Variables.First().Name;
            }

            return null;
        }

 EntityDeclaration ConvertEvent(IEvent ev)
 {
     if (this.UseCustomEvents) {
         CustomEventDeclaration decl = new CustomEventDeclaration();
         decl.Modifiers = GetMemberModifiers(ev);
         decl.ReturnType = ConvertType(ev.ReturnType);
         decl.Name = ev.Name;
         decl.AddAccessor    = ConvertAccessor(ev.AddAccessor, ev.Accessibility);
         decl.RemoveAccessor = ConvertAccessor(ev.RemoveAccessor, ev.Accessibility);
         return decl;
     } else {
         EventDeclaration decl = new EventDeclaration();
         decl.Modifiers = GetMemberModifiers(ev);
         decl.ReturnType = ConvertType(ev.ReturnType);
         decl.Variables.Add(new VariableInitializer(ev.Name));
         return decl;
     }
 }

        public override void VisitEventDeclaration(EventDeclaration eventDeclaration)
        {
            FixAttributesAndDocComment(eventDeclaration);

            foreach (var m in eventDeclaration.ModifierTokens) {
                ForceSpacesAfter(m, true);
            }

            ForceSpacesBeforeRemoveNewLines(eventDeclaration.EventToken.GetNextSibling(NoWhitespacePredicate), true);
            eventDeclaration.ReturnType.AcceptVisitor(this);
            ForceSpacesAfter(eventDeclaration.ReturnType, true);
            /*
            var lastLoc = eventDeclaration.StartLocation;
            curIndent.Push(IndentType.Block);
            foreach (var initializer in eventDeclaration.Variables) {
                if (lastLoc.Line != initializer.StartLocation.Line) {
                    FixStatementIndentation(initializer.StartLocation);
                    lastLoc = initializer.StartLocation;
                }
                initializer.AcceptVisitor(this);
            }
            curIndent.Pop ();
            */
            FixSemicolon(eventDeclaration.SemicolonToken);
        }

 private void CompileAndAddAutoEventMethodsToType(JsClass jsClass, EventDeclaration node, IEvent evt, EventScriptSemantics options, string backingFieldName)
 {
     if (options.AddMethod != null && options.AddMethod.GenerateCode) {
         var compiled = CreateMethodCompiler().CompileAutoEventAdder(evt, options, backingFieldName);
         AddCompiledMethodToType(jsClass, evt.AddAccessor, options.AddMethod, new JsMethod(evt.AddAccessor, options.AddMethod.Name, new string[0], compiled));
     }
     if (options.RemoveMethod != null && options.RemoveMethod.GenerateCode) {
         var compiled = CreateMethodCompiler().CompileAutoEventRemover(evt, options, backingFieldName);
         AddCompiledMethodToType(jsClass, evt.RemoveAccessor, options.RemoveMethod, new JsMethod(evt.RemoveAccessor, options.RemoveMethod.Name, new string[0], compiled));
     }
 }

			public override void Visit (EventProperty ep)
			{
				EventDeclaration newEvent = new EventDeclaration ();
				
				var location = LocationsBag.GetMemberLocation (ep);
				AddModifiers (newEvent, location);
				
				if (location != null)
					newEvent.AddChild (new CSharpTokenNode (Convert (location[0]), "event".Length), EventDeclaration.Roles.Keyword);
				newEvent.AddChild ((INode)ep.TypeName.Accept (this), EventDeclaration.Roles.ReturnType);
				newEvent.AddChild (new Identifier (ep.MemberName.Name, Convert (ep.MemberName.Location)), EventDeclaration.Roles.Identifier);
				if (location != null)
					newEvent.AddChild (new CSharpTokenNode (Convert (location[1]), 1), EventDeclaration.Roles.LBrace);
				
				if (ep.Add != null) {
					MonoDevelop.CSharp.Dom.Accessor addAccessor = new MonoDevelop.CSharp.Dom.Accessor ();
					var addLocation = LocationsBag.GetMemberLocation (ep.Add);
					AddModifiers (addAccessor, addLocation);
					addAccessor.AddChild (new CSharpTokenNode (Convert (ep.Add.Location), "add".Length), EventDeclaration.Roles.Keyword);
					if (ep.Add.Block != null)
						addAccessor.AddChild ((INode)ep.Add.Block.Accept (this), EventDeclaration.Roles.Body);
					newEvent.AddChild (addAccessor, EventDeclaration.EventAddRole);
				}
				
				if (ep.Remove != null) {
					MonoDevelop.CSharp.Dom.Accessor removeAccessor = new MonoDevelop.CSharp.Dom.Accessor ();
					var removeLocation = LocationsBag.GetMemberLocation (ep.Remove);
					AddModifiers (removeAccessor, removeLocation);
					removeAccessor.AddChild (new CSharpTokenNode (Convert (ep.Remove.Location), "remove".Length), EventDeclaration.Roles.Keyword);
					
					if (ep.Remove.Block != null)
						removeAccessor.AddChild ((INode)ep.Remove.Block.Accept (this), EventDeclaration.Roles.Body);
					newEvent.AddChild (removeAccessor, EventDeclaration.EventRemoveRole);
				}
				if (location != null)
					newEvent.AddChild (new CSharpTokenNode (Convert (location[2]), 1), EventDeclaration.Roles.RBrace);
				
				typeStack.Peek ().AddChild (newEvent, TypeDeclaration.Roles.Member);
			}

//.........这里部分代码省略.........
                    var result = new MethodDeclaration();

                    if (node.Children[0].HasChildren)
                        result.CustomAttributeSections.AddRange(node.Children[0].Children[0].GetAllListAstNodes<CustomAttributeSection>());

                    if (node.Children[1].HasChildren)
                        result.ModifierElements.AddRange(node.Children[1].Children[0].GetAllListAstNodes<ModifierElement>());

                    result.ReturnType = (TypeReference) node.Children[2].Result;
                    result.Identifier = ToIdentifier(node.Children[3].Result);
                    result.LeftParenthese = (AstToken) node.Children[4].Result;

                    if (node.Children[5].HasChildren)
                    {
                        foreach (var subNode in node.Children[5].Children[0].GetAllListAstNodes())
                        {
                            if (subNode is AstToken)
                                result.AddChild(AstNodeTitles.ElementSeparator, subNode);
                            else
                                result.Parameters.Add((ParameterDeclaration) subNode);
                        }
                    }

                    result.RightParenthese = (AstToken) node.Children[6].Result;

                    var body = node.Children[7].Result;
                    if (body is AstToken)
                        result.AddChild(AstNodeTitles.Semicolon, (AstToken) body);
                    else
                        result.Body = (BlockStatement) body;
                    return result;
                });

            var eventDeclaration = new GrammarDefinition("EventDeclaration",
                rule: customAttributeSectionListOptional
                      + modifierListOptional
                      + ToElement(EVENT)
                      + typeReference
                      + variableDeclaratorList
                      + ToElement(SEMICOLON),
                createNode: node =>
                {
                    var result = new EventDeclaration();

                    if (node.Children[0].HasChildren)
                        result.CustomAttributeSections.AddRange(node.Children[0].Children[0].GetAllListAstNodes<CustomAttributeSection>());

                    if (node.Children[1].HasChildren)
                        result.ModifierElements.AddRange(node.Children[1].Children[0].GetAllListAstNodes<ModifierElement>());

                    result.EventKeyword = (AstToken) node.Children[2].Result;
                    result.EventType = (TypeReference) node.Children[3].Result;

                    foreach (var subNode in node.Children[4].GetAllListAstNodes())
                    {
                        if (subNode is AstToken)
                            result.AddChild(AstNodeTitles.ElementSeparator, subNode);
                        else
                            result.Declarators.Add((VariableDeclarator) subNode);
                    }

                    result.AddChild(AstNodeTitles.Semicolon, node.Children[5].Result);
                    return result;
                });

            var accessorKeyword = new GrammarDefinition("AccessorKeyword",

		protected override string GenerateCode(ITypeDefinition currentClass)
		{
			bool implementInterface = this.implementInterface.IsChecked == true;
			bool hasOnPropertyChanged = HasOnPropertyChanged(currentClass);
			bool useEventArgs = false;
			
			AstNode insertionAnchorElement = refactoringContext.GetNode();
			if ((insertionAnchorElement == null) || !(insertionAnchorElement.Parent is TypeDeclaration)) {
				return null;
			}
			NewLineNode newLineNode = insertionAnchorElement as NewLineNode;
			while (insertionAnchorElement.PrevSibling is NewLineNode)
				insertionAnchorElement = insertionAnchorElement.PrevSibling ?? insertionAnchorElement;
			
			using (Script script = refactoringContext.StartScript()) {
				TypeDeclaration currentClassDeclaration = insertionAnchorElement.Parent as TypeDeclaration;
				
				if (implementInterface && !currentClass.IsStatic) {
					if (!hasOnPropertyChanged) {
						var nodes = new List<AstNode>();
						if (!currentClass.GetAllBaseTypeDefinitions().Any(bt => bt.FullName == "System.ComponentModel.INotifyPropertyChanged")) {
							AstNode nodeBeforeClassBlock = currentClassDeclaration.LBraceToken;
							if (nodeBeforeClassBlock.PrevSibling is NewLineNode) {
								// There's a new line before the brace, insert before it!
								nodeBeforeClassBlock = nodeBeforeClassBlock.PrevSibling;
							}
							int insertion = editor.Document.GetOffset(nodeBeforeClassBlock.StartLocation);
							
							AstType interfaceTypeNode = refactoringContext.CreateShortType("System.ComponentModel", "INotifyPropertyChanged", 0);
							var directBaseTypes = currentClass.DirectBaseTypes.Where(t => t.FullName != "System.Object");
							if (currentClassDeclaration.BaseTypes.Count > 0) {
								script.InsertText(insertion, ", " + interfaceTypeNode + " ");
							} else {
								script.InsertText(insertion, " : " + interfaceTypeNode + " ");
							}
						}

						var rt = new GetClassTypeReference("System.ComponentModel", "INotifyPropertyChanged", 0);
						var rtResolved = rt.Resolve(refactoringContext.Compilation);
						var ev = rtResolved.GetEvents().First(e => e.Name == "PropertyChanged");
						
						EventDeclaration propertyChangedEvent = new EventDeclaration();
						propertyChangedEvent.Variables.Add(new VariableInitializer(ev.Name));
						propertyChangedEvent.Modifiers = Modifiers.Public;
						propertyChangedEvent.ReturnType = refactoringContext.CreateShortType(ev.ReturnType);
						
						nodes.Add(propertyChangedEvent);
						
						MethodDeclaration onEvent = CreateOnEventMethod(ev, currentClass);
						nodes.Add(onEvent);
						foreach (var node in nodes) {
							script.InsertAfter(insertionAnchorElement, node);
							AppendNewLine(script, insertionAnchorElement, newLineNode);
						}
						useEventArgs = false;
					} else {
						useEventArgs = currentClass.GetMethods().First(m => m.Name == "OnPropertyChanged").Parameters[0].Type.FullName != "System.String";
					}
				}
				
				foreach (FieldWrapper field in fields.Where(f => f.IsIncluded)) {
					var prop = CreateProperty(field.Field, true, field.AddSetter);
					if (!field.Field.IsStatic && !currentClass.IsStatic && field.AddSetter && implementInterface) {
						var invocation = new ExpressionStatement(CreateInvocation(field.PropertyName, useEventArgs));
						var assignment = prop.Setter.Body.Children.ElementAt(0) as Statement;
						prop.Setter.Body = new BlockStatement();
						BlockStatement elseBlock = new BlockStatement();
						elseBlock.Add(assignment.Clone());
						elseBlock.Add(invocation);
						prop.Setter.Body.Add(
							new IfElseStatement(
								new BinaryOperatorExpression(new IdentifierExpression(field.MemberName), BinaryOperatorType.InEquality, new IdentifierExpression("value")),
								elseBlock
							)
						);
					}
					
					script.InsertAfter(insertionAnchorElement, prop);
					AppendNewLine(script, insertionAnchorElement, newLineNode);
				}
			}
			
			return null;
		}