/// <inheritdoc/>
// Called by the base class to write the start of the file (i.e. everything up to the body of the Instantiator class).
protected override void WriteFileStart(CodeBuilder builder)
{
// A sorted set to hold the namespaces that the generated code will use. The set is maintained in sorted order.
var namespaces = new SortedSet<string>();
if (Info.UsesCanvas)
{
namespaces.Add("Microsoft.Graphics.Canvas");
}
if (Info.UsesCanvasEffects)
{
namespaces.Add("Microsoft.Graphics.Canvas.Effects");
}
if (Info.UsesCanvasGeometry)
{
namespaces.Add("Microsoft.Graphics.Canvas.Geometry");
}
if (Info.UsesNamespaceWindowsUIXamlMedia)
{
namespaces.Add("System.ComponentModel");
namespaces.Add("System.Runtime.InteropServices.WindowsRuntime");
namespaces.Add("Windows.Foundation");
namespaces.Add("Windows.UI.Xaml.Media");
}
if (Info.GenerateDependencyObject)
{
namespaces.Add("Windows.UI.Xaml");
}
if (Info.UsesStreams)
{
namespaces.Add("System.IO");
}
namespaces.Add("System");
namespaces.Add("System.Numerics");
namespaces.Add("Windows.UI");
namespaces.Add("Windows.UI.Composition");
// Write out each namespace using.
foreach (var n in namespaces)
{
builder.WriteLine($"using {n};");
}
builder.WriteLine();
builder.WriteLine($"namespace {Info.Namespace}");
builder.OpenScope();
// Write a description of the source as comments.
foreach (var line in GetSourceDescriptionLines())
{
builder.WritePreformattedCommentLine(line);
}
// If the composition has LoadedImageSurface, write a class that implements the IDynamicAnimatedVisualSource interface.
// Otherwise, implement the IAnimatedVisualSource interface.
if (Info.LoadedImageSurfaces.Count > 0)
{
WriteIDynamicAnimatedVisualSource(builder, Info);
}
else
{
WriteIAnimatedVisualSource(builder, Info);
}
builder.CloseScope();
builder.WriteLine();
}
