private static void GeneratePropertyDeclaration(RequestParser rp, CodeWriter cw)
{
cw.AppendLine($"public {rp.NullableTargetType()} {rp.PropName}");
using var block = cw.CurlyBlock();
cw.AppendLine($"get => ({rp.NullableTargetType()})this.GetValue({rp.ParentType()}.{rp.DependencyPropName()});");
cw.AppendLine($"set => this.SetValue({rp.ParentType()}.{rp.DependencyPropName()}, value);");
}
private static void GenerateAttachedHelperMethods(RequestParser rp, CodeWriter cw)
{
cw.AppendLine($"public static {rp.NullableTargetType()} Get{rp.PropName}(System.Windows.DependencyObject obj) =>");
cw.AppendLine($" ({rp.NullableTargetType()})obj.GetValue({rp.ParentType()}.{rp.DependencyPropName()});");
cw.AppendLine($"public static void Set{rp.PropName}(System.Windows.DependencyObject obj, {rp.NullableTargetType()} value) =>");
cw.AppendLine($" obj.SetValue({rp.ParentType()}.{rp.DependencyPropName()}, value);");
}
private static void GenerateAccessorMembers(RequestParser rp, CodeWriter cw)
{
if (rp.Attached)
{
GenerateAttachedHelperMethods(rp, cw);
}
else
{
GeneratePropertyDeclaration(rp, cw);
}
}
private static void GenerateDependencyPropertyDeclaration(RequestParser rp, CodeWriter cw)
{
if (rp.Type == null)
{
return;
}
cw.AppendLine($"// {rp.PropName} Dependency Property Implementation");
GenerateDependencyProperty(rp, cw);
GenerateAccessorMembers(rp, cw);
cw.AppendLine();
}
private static void GenerateDependencyProperty(RequestParser rp, CodeWriter cw)
{
if (rp.FromCustomDpDeclaration)
{
return;
}
cw.AppendLine($"public static readonly System.Windows.DependencyProperty {rp.DependencyPropName()} = ");
var attached = rp.Attached ? "Attached" : "";
cw.AppendLine($" System.Windows.DependencyProperty.Register{attached}(");
cw.AppendLine($" \"{rp.PropName}\", typeof({TypeOfArgument(rp)}), typeof({rp.ParentType()}),");
cw.AppendLine($" new System.Windows.FrameworkPropertyMetadata({rp.DefaultExpression()}{ChangeFunc(rp)}));");
cw.AppendLine();
}
public static void Generate(this RequestParser rp, CodeWriter cw)
{
GenerateDependencyPropertyDeclaration(rp, cw);
}
private static string ChangeFunc(RequestParser rp)
{
return(ChangeFunctionFinder.ComputerChangeFunction(rp));
}
private static string TypeOfArgument(RequestParser rp) => rp.Type != null && rp.Type.IsValueType ? rp.NullableTargetType() : rp.TargetType();
public static string ComputerChangeFunction(RequestParser rp)
{
var methodName = $"On{rp.PropName}Changed";
var candidates = rp.ParentSymbol.GetMembers(methodName);
foreach (var candidate in candidates.OfType <IMethodSymbol>())
{
if (!candidate.ReturnsVoid)
{
continue;
}
if (candidate.IsStatic)
{
if (candidate.VerifyParameterTypes(
"System.Windows.DependencyObject", "System.Windows.DependencyPropertyChangedEventArgs"))
{
return($", {rp.ParentType()}.{methodName}");
}
if (candidate.VerifyParameterTypes("System.Windows.DependencyObject", rp.NullableTargetType()))
{
return($", (i,j)=>{rp.ParentType()}.{methodName}(i, ({rp.NullableTargetType()})(j.NewValue))");
}
if (candidate.VerifyParameterTypes(
"System.Windows.DependencyObject", rp.NullableTargetType(), rp.NullableTargetType()))
{
return($", (i,j)=>{rp.ParentType()}.{methodName}(i, ({rp.NullableTargetType()})(j.OldValue), ({rp.NullableTargetType()})(j.NewValue))");
}
if (candidate.VerifyParameterTypes(
rp.ParentType(), "System.Windows.DependencyPropertyChangedEventArgs"))
{
return($", (i,j)=>{rp.ParentType()}.{methodName}((({rp.ParentType()})i),j)");
}
if (candidate.VerifyParameterTypes(null, rp.NullableTargetType()))
{
return($", (i,j)=>{rp.ParentType()}.{methodName}((({candidate.Parameters[0].Type.FullyQualifiedName()})i), ({rp.NullableTargetType()})(j.NewValue))");
}
if (candidate.VerifyParameterTypes(
null, rp.NullableTargetType(), rp.NullableTargetType()))
{
return($", (i,j)=>{rp.ParentType()}.{methodName}((({candidate.Parameters[0].Type.FullyQualifiedName()})i), ({rp.NullableTargetType()})(j.OldValue), ({rp.NullableTargetType()})(j.NewValue))");
}
return("");
}
// not static
if (candidate.Parameters.Length == 0)
{
return($", (i,j)=>(({rp.ParentType()})i).{methodName}()");
}
if (candidate.VerifyParameterTypes("System.Windows.DependencyPropertyChangedEventArgs"))
{
return($", (i,j)=>(({rp.ParentType()})i).{methodName}(j)");
}
if (candidate.VerifyParameterTypes(rp.NullableTargetType()))
{
return($", (i,j)=>(({rp.ParentType()})i).{methodName}(({rp.NullableTargetType()})(j.NewValue))");
}
if (candidate.VerifyParameterTypes(rp.NullableTargetType(), rp.NullableTargetType()))
{
return($", (i,j)=>(({rp.ParentType()})i).{methodName}(({rp.NullableTargetType()})(j.OldValue), ({rp.NullableTargetType()})(j.NewValue))");
}
}
return("");
}
