Viewport <#document> at [0,0] [0+0+0 800 0+0+0] [0+0+0 600 0+0+0] [BFC] children: not-inline
  BlockContainer <html> at [0,0] [0+0+0 800 0+0+0] [0+0+0 112 0+0+0] [BFC] children: not-inline
    BlockContainer <body> at [8,8] [8+0+0 784 0+0+8] [8+0+0 96 0+0+8] children: not-inline
      BlockContainer <div> at [8,8] [0+0+0 784 0+0+0] [0+0+0 48 0+0+0] children: inline
        frag 0 from TextNode start: 0, length: 5, rect: [8,8 121.359375x48] baseline: 38.390625
            "12345"
        TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [8,56] [0+0+0 784 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)
      BlockContainer <div> at [8,56] [0+0+0 784 0+0+0] [0+0+0 48 0+0+0] children: inline
        frag 0 from TextNode start: 0, length: 1, rect: [122.0625,56 28.03125x48] baseline: 38.390625
            "a"
        BlockContainer <span> at [8,56] floating [0+0+0 114.0625 0+0+0] [0+0+0 48 0+0+0] [BFC] children: inline
          frag 0 from TextNode start: 0, length: 2, rect: [8,56 114.0625x48] baseline: 38.390625
              "aa"
          TextNode <#text> (not painted)
        TextNode <#text> (not painted)
      BlockContainer <(anonymous)> at [8,104] [0+0+0 784 0+0+0] [0+0+0 0 0+0+0] children: inline
        TextNode <#text> (not painted)

ViewportPaintable (Viewport<#document>) [0,0 800x600]
  PaintableWithLines (BlockContainer<HTML>) [0,0 800x112]
    PaintableWithLines (BlockContainer<BODY>) [8,8 784x96]
      PaintableWithLines (BlockContainer<DIV>) [8,8 784x48]
      PaintableWithLines (BlockContainer(anonymous)) [8,56 784x0]
      PaintableWithLines (BlockContainer<DIV>) [8,56 784x48]
        PaintableWithLines (BlockContainer<SPAN>) [8,56 114.0625x48]
      PaintableWithLines (BlockContainer(anonymous)) [8,104 784x0]

SC for Viewport<#document> [0,0 800x600] (z-index: auto)
 SC for BlockContainer<HTML> [0,0 800x112] (z-index: auto)
