# Generate png with: dot -Tpng -O cast.gv

digraph shaka2_cast {
  label=<<u>Shaka 2 Cast Diagram</u>>
  labelloc=t
  node [ shape=rectangle ]
  edge [ fontsize=10 ]

  # Video tags are part of the local browser and remote Cast device
  "local <video>" [ shape=oval ]
  "remote <video>" [ shape=oval ]

  # Controls are provided by the app
  "video controls" [ shape=polygon ]

  # The CastProxy class creates proxies for both Player and video tag
  CastProxy -> "proxy Player" [ label=".getPlayer()  " ]
  CastProxy -> "proxy <video>" [ label=".getVideo()  " ]

  # Each Player owns its respective video tag
  "local Player" -> "local <video>"
  "remote Player" -> "remote <video>"

  # The proxies forward/delegate to the correct instance based on casting state
  "proxy Player" -> "local Player" [ style=dotted label="delegate" dir=both ]
  "proxy Player" -> "remote Player" [ style=dotted label="delegate" dir=both ]
  "proxy <video>" -> "local <video>" [ style=dotted label="delegate" dir=both ]
  "proxy <video>" -> "remote <video>" [ style=dotted label="delegate" dir=both ]

  # The app's controls go through the proxy and don't worry about cast state
  "video controls" -> "proxy Player" [ label=".configure()\n.load()\nevents" dir=both ]
  "video controls" -> "proxy <video>" [ label=".play()\n.pause()\n.currentTime\nevents" dir=both ]
  # The app asks the proxy to cast
  "video controls" -> CastProxy [ label=".cast()" ]
}