current: https://github.com/microsoft/vs-editor-api/tree/5ce6368e5b71451d75a388db524e5e104e222122 draft over xwt & skia: https://github.com/mkrueger/Microsoft.VisualStudio.Text.Editor.Implementation.CrossPlatform Proposal: merge mkrueger-crossplattform into microsoft/vs-editor & adopt to use GtkSharp/GtkSharp alternatives: https://github.com/icsharpcode/AvalonEdit/tree/master/ICSharpCode.AvalonEdit