private static void CreateIf(DocumentEditor editor, ExpressionStatementSyntax setAndRaise, ExpressionStatementSyntax invocation) { editor.RemoveNode(setAndRaise); editor.ReplaceNode( invocation, (node, _) => { var code = StringBuilderPool.Borrow() .AppendLine($"if ({setAndRaise.ToFullString().TrimEnd('\r', '\n', ';')})") .AppendLine("{") .AppendLine($" {invocation.ToFullString().TrimEnd('\r', '\n')}") .AppendLine("}") .Return(); return(SyntaxFactory.ParseStatement(code) .WithSimplifiedNames() .WithLeadingElasticLineFeed() .WithTrailingElasticLineFeed() .WithAdditionalAnnotations(Formatter.Annotation)); }); }
private static void MakeWithBackingFieldNotifyWhenValueChanges(DocumentEditor editor, PropertyDeclarationSyntax propertyDeclaration, IMethodSymbol invoker, SemanticModel semanticModel, CancellationToken cancellationToken) { var classDeclaration = propertyDeclaration.FirstAncestorOrSelf <ClassDeclarationSyntax>(); if (classDeclaration == null) { return; } if (propertyDeclaration.TryGetSetter(out var setter)) { if (setter.ExpressionBody != null && IsSimpleAssignmentOnly(propertyDeclaration, out _, out _, out var assignment, out _)) { var property = semanticModel.GetDeclaredSymbolSafe(propertyDeclaration, cancellationToken); var underscoreFields = CodeStyle.UnderscoreFields(semanticModel); var code = StringBuilderPool.Borrow() .AppendLine($"public Type PropertyName") .AppendLine("{") .AppendLine($" get => {assignment.Left};") .AppendLine() .AppendLine(" set") .AppendLine(" {") .AppendLine($" if ({Snippet.EqualityCheck(property.Type, "value", assignment.Left.ToString(), semanticModel)})") .AppendLine(" {") .AppendLine($" return;") .AppendLine(" }") .AppendLine() .AppendLine($" {assignment};") .AppendLine($" {Snippet.OnPropertyChanged(invoker, property.Name, underscoreFields)}") .AppendLine(" }") .AppendLine("}") .Return(); var template = ParseProperty(code); editor.ReplaceNode( setter, (x, _) => { var old = (AccessorDeclarationSyntax)x; return(old.WithBody(template.Setter().Body) .WithExpressionBody(null) .WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.None))); }); editor.FormatNode(propertyDeclaration); } if (setter.Body?.Statements.Count == 1 && IsSimpleAssignmentOnly(propertyDeclaration, out _, out var statement, out assignment, out _)) { var property = semanticModel.GetDeclaredSymbolSafe(propertyDeclaration, cancellationToken); var code = StringBuilderPool.Borrow() .AppendLine($" if ({Snippet.EqualityCheck(property.Type, "value", assignment.Left.ToString(), semanticModel)})") .AppendLine(" {") .AppendLine($" return;") .AppendLine(" }") .AppendLine() .Return(); var ifStatement = SyntaxFactory.ParseStatement(code) .WithSimplifiedNames() .WithLeadingElasticLineFeed() .WithTrailingElasticLineFeed() .WithAdditionalAnnotations(Formatter.Annotation); editor.InsertBefore( statement, ifStatement); var underscoreFields = CodeStyle.UnderscoreFields(semanticModel); var notifyStatement = SyntaxFactory .ParseStatement( Snippet.OnPropertyChanged(invoker, property.Name, underscoreFields)) .WithSimplifiedNames() .WithLeadingElasticLineFeed() .WithTrailingElasticLineFeed() .WithAdditionalAnnotations(Formatter.Annotation); editor.InsertAfter(statement, notifyStatement); editor.FormatNode(propertyDeclaration); } } }