Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x158 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x134 children: not-inline
      BlockContainer <(anonymous)> at (8,8) content-size 784x100 children: inline
        BlockContainer <div.a> at (8,8) content-size 100x100 floating [BFC] children: not-inline
        TextNode <#text>
        BreakNode <br.b>
        TextNode <#text>
      BlockContainer <p> at (8,124) content-size 784x18 children: inline
        frag 0 from TextNode start: 0, length: 3, rect: [8,124 27.15625x18] baseline: 13.796875
            "foo"
        TextNode <#text>
      BlockContainer <(anonymous)> at (8,158) content-size 784x0 children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x158]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x134]
      PaintableWithLines (BlockContainer(anonymous)) [8,8 784x100]
        PaintableWithLines (BlockContainer<DIV>.a) [8,8 100x100]
      PaintableWithLines (BlockContainer<P>) [8,124 784x18]
        TextPaintable (TextNode<#text>)
      PaintableWithLines (BlockContainer(anonymous)) [8,158 784x0]
