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https://github.com/rowtype-yoga/purescript-docs-search.git
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added: "S" hotkey to focus on search field (#4)
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@ -16,3 +16,9 @@ spago docs
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spago bundle-app -m Docs.Search.App --to generated-docs/docs-search-app.js
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spago run -m Docs.Search.IndexBuilder
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```
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## UI
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The user interface of the app is optimised for keyboard-only use.
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**S** hotkey can be used to focus on the search field, **Escape** can be used to leave it. Pressing **Escape** twice will close the search results listing.
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@ -41,7 +41,7 @@ let additions =
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, "web-uievents"
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]
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"https://github.com/slamdata/purescript-halogen.git"
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"v5.0.0-rc.4"
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"v5.0.0-rc.5"
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, halogen-css =
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mkPackage
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[ "css", "halogen" ]
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@ -2,23 +2,38 @@ module Docs.Search.App.SearchField where
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import Prelude
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import CSS hiding (render, map)
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import Data.Maybe (Maybe(..))
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import CSS (border, borderRadius, color, em, float, floatLeft, fontWeight, lineHeight, marginBottom, marginLeft, paddingBottom, paddingLeft, paddingRight, paddingTop, pct, px, rgb, solid, weight, width)
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import Data.Maybe (Maybe(..), maybe)
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import Data.Newtype (wrap)
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import Effect (Effect)
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import Effect.Aff (Aff)
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import Halogen as H
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import Halogen.HTML as HH
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import Halogen.HTML.CSS as HS
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import Halogen.HTML.Events as HE
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import Halogen.HTML.Properties as HP
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import Halogen.Query.EventSource as ES
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import Web.DOM.Document as Document
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import Web.DOM.ParentNode as ParentNode
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import Web.HTML (window) as Web
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import Web.HTML as HTML
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import Web.HTML.HTMLDocument as HTMLDocument
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import Web.HTML.HTMLElement (blur, focus, fromElement) as Web
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import Web.HTML.Window (document) as Web
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import Web.HTML.Window as Window
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import Web.UIEvent.KeyboardEvent (KeyboardEvent)
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import Web.UIEvent.KeyboardEvent as KE
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import Web.UIEvent.KeyboardEvent as KeyboardEvent
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import Web.UIEvent.KeyboardEvent.EventTypes as KET
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type State = { input :: String }
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type State = { input :: String, focused :: Boolean }
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data Action
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= InputAction String
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| EnterPressed
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| EscapePressed
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| FocusChanged Boolean
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| InitKeyboardListener
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| HandleKey H.SubscriptionId KeyboardEvent
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data SearchFieldMessage
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= InputUpdated String
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@ -31,28 +46,61 @@ component =
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H.mkComponent
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{ initialState
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, render
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, eval: H.mkEval $ H.defaultEval { handleAction = handleAction }
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, eval: H.mkEval $ H.defaultEval { handleAction = handleAction
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, initialize = Just InitKeyboardListener }
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}
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initialState :: forall i. i -> State
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initialState _ = { input: "" }
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initialState _ = { input: "", focused: false }
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handleAction :: forall m. Action -> H.HalogenM State Action () SearchFieldMessage m Unit
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handleAction :: Action -> H.HalogenM State Action () SearchFieldMessage Aff Unit
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handleAction = case _ of
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InputAction input -> do
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H.modify_ $ const { input }
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EnterPressed -> do
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InitKeyboardListener -> do
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document <- H.liftEffect $ Web.document =<< Web.window
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H.subscribe' \sid ->
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ES.eventListenerEventSource
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KET.keyup
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(HTMLDocument.toEventTarget document)
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(map (HandleKey sid) <<< KE.fromEvent)
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HandleKey sid ev -> do
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when (KE.code ev == "KeyS") do
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H.liftEffect $ withSearchField Web.focus
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when (KE.code ev == "Escape") do
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state <- H.get
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H.raise $ InputUpdated state.input
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EscapePressed -> do
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if state.focused
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then H.liftEffect $ withSearchField Web.blur
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else do
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H.modify_ (_ { input = "" })
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H.raise $ InputCleared
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InputAction input -> do
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H.modify_ $ (_ { input = input })
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EnterPressed -> do
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state <- H.get
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H.liftEffect $ withSearchField Web.blur
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H.raise $ InputUpdated state.input
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FocusChanged status -> do
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H.modify_ (_ { focused = status })
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H.raise
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if status
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then Focused
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else LostFocus
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withSearchField :: (HTML.HTMLElement -> Effect Unit) -> Effect Unit
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withSearchField cont = do
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doc <- Document.toParentNode <$>
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HTMLDocument.toDocument <$>
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(Window.document =<< HTML.window)
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let selector = wrap "#docs-search-query-field"
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mbEl <- ParentNode.querySelector selector doc
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maybe mempty cont (mbEl >>= Web.fromElement)
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render :: forall m. State -> H.ComponentHTML Action () m
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render state =
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HH.div
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@ -68,11 +116,11 @@ render state =
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[ HH.input
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[ HP.value state.input
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, HP.placeholder "Search for definitions"
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, HP.id_ "docs-search-query-field"
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, HP.type_ HP.InputText
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, HE.onKeyUp (\event ->
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case KeyboardEvent.code event of
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"Enter" -> Just EnterPressed
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"Escape" -> Just EscapePressed
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_ -> Nothing)
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, HE.onValueInput (Just <<< InputAction)
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, HE.onFocusIn $ const $ Just $ FocusChanged true
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