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);
}
}
}
