{-|
Module      : Monomer.Main.UserUtil
Copyright   : (c) 2018 Francisco Vallarino
License     : BSD-3-Clause (see the LICENSE file)
Maintainer  : fjvallarino@gmail.com
Stability   : experimental
Portability : non-portable

Helper functions for Monomer users, to simplify common operations such as focus
change and clipboard requests.
-}
module Monomer.Main.UserUtil where

import Control.Applicative ((<|>))
import Control.Lens
import Data.Default
import Data.Maybe
import Data.Text (Text)

import Monomer.Widgets.Composite

import qualified Monomer.Core.Lens as L
import qualified Monomer.Main.Lens as L

{-|
Generates a response to sets focus on the given key, provided as WidgetKey. If
the key does not exist, focus will remain on the currently focused widget.
-}
setFocusOnKey :: WidgetEnv s e -> WidgetKey -> EventResponse s e sp ep
setFocusOnKey wenv key = Request (SetFocus widgetId) where
  widgetId = fromMaybe def (widgetIdFromKey wenv key)

-- | Generates a response that sets the clipboard to the given data
setClipboardData :: ClipboardData -> EventResponse s e sp ep
setClipboardData cdata = Request (SetClipboard cdata)

-- | Generates a response that sets the cursor to the given icon
setCursorIcon :: WidgetNode s e -> CursorIcon -> EventResponse s e sp ep
setCursorIcon node icon = Request (SetCursorIcon widgetId icon) where
  widgetId = node ^. L.info . L.widgetId

-- | Generates a response that resets the cursor icon
resetCursorIcon :: WidgetNode s e -> EventResponse s e sp ep
resetCursorIcon node = Request (ResetCursorIcon widgetId) where
  widgetId = node ^. L.info . L.widgetId

-- | Generates a response that exits the application
exitApplication :: EventResponse s e sp ep
exitApplication = Request (ExitApplication True)

-- | Generates a response that cancels a request to exit the application
cancelExitApplication :: EventResponse s e sp ep
cancelExitApplication = Request (ExitApplication False)