layer at (0,0) size 800x600
  RenderCanvas at (0,0) size 800x600
layer at (0,0) size 800x600
  RenderBlock {HTML} at (0,0) size 800x600
    RenderBody {BODY} at (8,8) size 784x576
      RenderBlock {P} at (0,0) size 784x18
        RenderInline {FONT} at (0,0) size 37x18
          RenderInline {B} at (0,0) size 37x18
            RenderText {TEXT} at (0,0) size 37x18
              text run at (0,0) width 37: "hello"
      RenderBlock {P} at (0,34) size 784x18
        RenderInline {FONT} at (0,0) size 39x18
          RenderInline {B} at (0,0) size 39x18
            RenderText {TEXT} at (0,0) size 39x18
              text run at (0,0) width 39: "there"
      RenderBlock {P} at (0,68) size 784x18
        RenderInline {FONT} at (0,0) size 37x18
          RenderInline {B} at (0,0) size 37x18
            RenderText {TEXT} at (0,0) size 37x18
              text run at (0,0) width 37: "hello"
      RenderBlock {P} at (0,102) size 784x18
        RenderInline {FONT} at (0,0) size 39x18
          RenderInline {B} at (0,0) size 39x18
            RenderText {TEXT} at (0,0) size 39x18
              text run at (0,0) width 39: "there"
selection is CARET:
start:      position 5 of child 1 {TEXT} of child 1 {B} of child 1 {FONT} of child 5 {P} of root {BODY}
upstream:   position 5 of child 1 {TEXT} of child 1 {B} of child 1 {FONT} of child 5 {P} of root {BODY}
downstream: position 5 of child 1 {TEXT} of child 1 {B} of child 1 {FONT} of child 5 {P} of root {BODY}