public override IDrawable Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
{
if (reader.TokenType != JsonTokenType.StartObject)
{
throw new JsonException();
}
reader.Read();
if (reader.TokenType != JsonTokenType.PropertyName)
{
throw new JsonException();
}
string propertyName = reader.GetString();
if (propertyName != "$type")
{
throw new JsonException();
}
reader.Read();
if (reader.TokenType != JsonTokenType.String)
{
throw new JsonException();
}
var typeDiscriminator = reader.GetString();
IDrawable drawable;
if (typeDiscriminator == GetDiscriminator(typeof(InkDrawable)) || typeDiscriminator == OldInkDrawableDiscriminator)
{
drawable = new InkDrawable();
}
else if (typeDiscriminator == GetDiscriminator(typeof(TextDrawable)) || typeDiscriminator == OldTextDrawableDiscriminator)
{
drawable = new TextDrawable();
}
else
{
throw new JsonException();
}
while (reader.Read())
{
if (reader.TokenType == JsonTokenType.EndObject)
{
drawable.OnDeserialized();
return(drawable);
}
if (reader.TokenType == JsonTokenType.PropertyName)
{
propertyName = reader.GetString();
reader.Read();
switch (propertyName)
{
case "IsActive":
drawable.IsActive = reader.GetBoolean();
break;
case "Bounds":
drawable.Bounds = JsonSerializer.Deserialize <Rect>(ref reader);
break;
default:
drawable.ReadProperty(propertyName, ref reader);
break;
}
}
}
throw new JsonException();
}
public InfiniteCanvasCreateInkCommand(List <IDrawable> drawableList, IReadOnlyList <InkStroke> strokes)
{
_drawable = new InkDrawable(strokes);
_drawableList = drawableList;
}