Adding extra padding to TextSpan background in RichText widget

The new solution in 2019 with flutter 1.7.8 is WidgetSpan, you could just add a Container and a Padding or any combination of widget to make more variety!

Here is an example to use on the case:

WidgetSpan(
  child: Container(
    color: Colors.red,
    padding: EdgeInsets.all(8.0),
    child: Text("background on me", style: ...),
  )
)

And don't forget to change <TextSpan>[] to <InlineSpan>[], that's It!

Quite ugly solution, but I haven't found other (

TextStyle(fontWeight: FontWeight.bold,
  background: Paint()..color = Colors.redAccent
    ..strokeWidth = 16.5
    ..style = PaintingStyle.stroke,)

strokeWidth have to be big enough to cover height of text. In my case 16.5 is minimal suitable value