public void SetColorThemeProperty(string propertyName, Color?color)
{
if (_colorsBindings.TryGetValue(propertyName, out var existing))
{
existing.NextValue = color;
}
else
{
_colorsBindings[propertyName] = new ColorBinding {
NextValue = color
};
}
if (_currentDocument == null)
{
return; // no document to change yet
}
if (ApplyProperties())
{
NotifyCallback();
}
}
private void LoadAndParseDocument(IInputStream sourceJson)
{
JObject document;
using (var stream = sourceJson.AsStreamForRead(0))
{
using var streamReader = new StreamReader(stream);
using var reader = new JsonTextReader(streamReader);
document = JObject.Load(reader);
}
_currentDocument = document;
foreach (var colorBinding in _colorsBindings)
{
colorBinding.Value.Elements.Clear();
}
void ParseLayers(JToken layersElement)
{
if (!(layersElement is JArray layers))
{
return; // potentially invalid lottie file
}
foreach (var layer in layers)
{
if (layer is JObject l)
{
var shapesValue = l.GetValue("shapes");
if (shapesValue is JArray shapes)
{
foreach (var shape in shapes)
{
if (shape is JObject s)
{
ParseShape(s);
}
}
}
}
}
}
void ParseShape(JObject shapeElement)
{
var typeValue = shapeElement.GetValue("ty");
if (typeValue.Type != JTokenType.String)
{
return; // potentially invalid lottie file
}
var shapeType = typeValue.Value <string>();
if (shapeType != null && shapeType.Equals("gr"))
{
// That's a group
var itemsProperty = shapeElement.GetValue("it");
if (itemsProperty is JArray items)
{
foreach (var item in items)
{
if (item is JObject s)
{
ParseShape(s);
}
}
}
return;
}
var nameProperty = shapeElement.GetValue("nm");
if (nameProperty.Type != JTokenType.String)
{
return; // No name
}
var name = nameProperty.Value <string>();
if (!string.IsNullOrWhiteSpace(name))
{
var elementBindings = PropertyBindingsParser.ParseBindings(name);
if (elementBindings.Length > 0)
{
foreach (var binding in elementBindings)
{
if (binding.propertyName.Equals("Color", StringComparison.Ordinal))
{
if (_colorsBindings.TryGetValue(binding.bindingName, out var colorBinding))
{
colorBinding.Elements.Add(shapeElement);
}
else
{
colorBinding = new ColorBinding();
colorBinding.Elements.Add(shapeElement);
_colorsBindings[binding.bindingName] = colorBinding;
}
}
}
}
}
}
if (document.TryGetValue("layers", out var layers))
{
ParseLayers(layers);
}
}
