132 lines
3.4 KiB
Elm
132 lines
3.4 KiB
Elm
module ViewHelper
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exposing
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( formatContent
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, getMentionForLink
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, onClickWithStop
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, onClickWithPrevent
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, onClickWithPreventAndStop
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, toVirtualDom
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)
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import Html exposing (..)
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import Html.Attributes exposing (..)
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import Html.Events exposing (onWithOptions)
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import HtmlParser
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import Json.Decode as Decode
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import String.Extra exposing (replace)
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import Mastodon.Model
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import Model exposing (Msg(LoadAccount))
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-- Custom Events
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onClickWithPreventAndStop : msg -> Attribute msg
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onClickWithPreventAndStop msg =
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onWithOptions
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"click"
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{ preventDefault = True, stopPropagation = True }
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(Decode.succeed msg)
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onClickWithPrevent : msg -> Attribute msg
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onClickWithPrevent msg =
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onWithOptions
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"click"
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{ preventDefault = True, stopPropagation = False }
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(Decode.succeed msg)
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onClickWithStop : msg -> Attribute msg
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onClickWithStop msg =
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onWithOptions
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"click"
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{ preventDefault = False, stopPropagation = True }
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(Decode.succeed msg)
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-- Views
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formatContent : String -> List Mastodon.Model.Mention -> List (Html Msg)
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formatContent content mentions =
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content
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|> replace " ?" " ?"
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|> replace " !" " !"
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|> replace " :" " :"
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|> HtmlParser.parse
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|> toVirtualDom mentions
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{-| Converts nodes to virtual dom nodes.
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-}
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toVirtualDom : List Mastodon.Model.Mention -> List HtmlParser.Node -> List (Html Msg)
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toVirtualDom mentions nodes =
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List.map (toVirtualDomEach mentions) nodes
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createLinkNode : List ( String, String ) -> List HtmlParser.Node -> List Mastodon.Model.Mention -> Html Msg
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createLinkNode attrs children mentions =
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let
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maybeMention =
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getMentionForLink attrs mentions
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in
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case maybeMention of
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Just mention ->
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Html.node "a"
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((List.map toAttribute attrs)
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++ [ onClickWithPreventAndStop (LoadAccount mention.id) ]
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)
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(toVirtualDom mentions children)
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Nothing ->
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Html.node "a"
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((List.map toAttribute attrs)
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++ [ onClickWithStop Model.NoOp, target "_blank" ]
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)
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(toVirtualDom mentions children)
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getHrefLink : List ( String, String ) -> Maybe String
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getHrefLink attrs =
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attrs
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|> List.filter
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(\( name, value ) -> (name == "href"))
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|> List.map
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(\( name, value ) -> value)
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|> List.head
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getMentionForLink : List ( String, String ) -> List Mastodon.Model.Mention -> Maybe Mastodon.Model.Mention
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getMentionForLink attrs mentions =
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case getHrefLink attrs of
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Just href ->
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mentions
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|> List.filter (\m -> m.url == href)
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|> List.head
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Nothing ->
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Nothing
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toVirtualDomEach : List Mastodon.Model.Mention -> HtmlParser.Node -> Html Msg
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toVirtualDomEach mentions node =
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case node of
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HtmlParser.Element "a" attrs children ->
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createLinkNode attrs children mentions
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HtmlParser.Element name attrs children ->
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Html.node name (List.map toAttribute attrs) (toVirtualDom mentions children)
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HtmlParser.Text s ->
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text s
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HtmlParser.Comment _ ->
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text ""
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toAttribute : ( String, String ) -> Attribute msg
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toAttribute ( name, value ) =
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attribute name value
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