Viewport <#document> at (0,0) content-size 800x600 children: not-inline
  BlockContainer <html> at (0,0) content-size 800x316 [BFC] children: not-inline
    BlockContainer <body> at (8,8) content-size 784x300 children: not-inline
      BlockContainer <div.a> at (300,8) content-size 200x300 [BFC] children: inline
        TextNode <#text>
        BlockContainer <div.b.g> at (300,8) content-size 150x150 floating [BFC] children: not-inline
        TextNode <#text>
        BlockContainer <div.b.r> at (300,158) content-size 150x150 floating [BFC] children: not-inline
        TextNode <#text>
      BlockContainer <(anonymous)> at (8,308) content-size 784x0 children: inline
        TextNode <#text>

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x316]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x300]
      PaintableWithLines (BlockContainer<DIV>.a) [300,8 200x300]
        PaintableWithLines (BlockContainer<DIV>.b.g) [300,8 150x150]
        PaintableWithLines (BlockContainer<DIV>.b.r) [300,158 150x150]
      PaintableWithLines (BlockContainer(anonymous)) [8,308 784x0]
