content: {-# LANGUAGE FlexibleInstances #-}
  {-# LANGUAGE OverloadedStrings #-}
  {-# LANGUAGE DataKinds #-}
  {-# LANGUAGE TypeSynonymInstances #-}
  {-# LANGUAGE TypeApplications #-}
  
  {-# OPTIONS_GHC -fno-warn-orphans #-}
  
  module IHaskell.Display.Widgets.String.HTML
    ( -- * The HTML Widget
      HTMLWidget
      -- * Constructor
    , mkHTML
    ) where
  
  -- To keep `cabal repl` happy when running from the ihaskell repo
  import           Prelude
  
  import           Data.Aeson
  import           Data.IORef (newIORef)
  
  import           IHaskell.Display
  import           IHaskell.Eval.Widgets
  import           IHaskell.IPython.Message.UUID as U
  
  import           IHaskell.Display.Widgets.Types
  import           IHaskell.Display.Widgets.Layout.LayoutWidget
  import           IHaskell.Display.Widgets.Style.DescriptionStyle
  
  -- | A 'HTMLWidget' represents a HTML widget from IPython.html.widgets.
  type HTMLWidget = IPythonWidget HTMLType
  
  -- | Create a new HTML widget
  mkHTML :: IO HTMLWidget
  mkHTML = do
    -- Default properties, with a random uuid
    wid <- U.random
    layout <- mkLayout
    dstyle <- mkDescriptionStyle
  
    let widgetState = WidgetState $ defaultStringWidget "HTMLView" "HTMLModel" layout $ StyleWidget dstyle
  
    stateIO <- newIORef widgetState
  
    let widget = IPythonWidget wid stateIO
  
    -- Open a comm for this widget, and store it in the kernel state
    widgetSendOpen widget $ toJSON widgetState
  
    -- Return the widget
    return widget
  
  instance IHaskellWidget HTMLWidget where
    getCommUUID = uuid
  