Function paint_own_chat_bubble 

pub fn paint_own_chat_bubble(
    scene: &mut Scene,
    transform: Affine,
    text_renderer: &mut TextRenderer,
    theme: &Theme,
    _: (Point, &str, AlphaColor<Srgb>),
    _: (&str, f64, Rect),
) -> (Rect, Rect)

This person’s own cursor-chat bubble while they type, beside their pointer at at: the same bubble everyone else sees, in their colour and under their name, sized for message and at least min_text_w wide, kept inside bounds (left of or above the pointer near an edge). Paints its shape and name and returns the bubble and the one-line rect the caller puts its text field in.