/
Breadcrumb.purs
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Breadcrumb.purs
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module Lumi.Components.Breadcrumb
( breadcrumb
, compactBreadcrumb
, styles
) where
import Prelude
import Color (cssStringHSLA)
import Data.Array (null, (:))
import Data.Array.NonEmpty (NonEmptyArray)
import Data.Array.NonEmpty as NEA
import Data.Foldable (intercalate)
import Data.Maybe (Maybe(..))
import Data.Monoid (guard)
import Data.Nullable (Nullable, toMaybe)
import Effect.Uncurried (EffectFn1, runEffectFn1)
import Effect.Unsafe (unsafePerformEffect)
import JSS (JSS, jss)
import Lumi.Components.Color (colors)
import Lumi.Components.Link as Link
import React.Basic.Classic (JSX, createComponent, element, makeStateless)
import React.Basic.DOM as R
import Web.HTML.History (URL)
type BreadcrumbProps =
{ onNavigate :: Nullable (EffectFn1 URL Unit)
, items ::
NonEmptyArray
{ label :: String
, href :: URL
}
}
breadcrumb :: BreadcrumbProps -> JSX
breadcrumb { onNavigate, items } =
genericBreadcrumb { onNavigate, items, compact: false }
compactBreadcrumb :: BreadcrumbProps -> JSX
compactBreadcrumb { onNavigate, items } =
genericBreadcrumb { onNavigate, items, compact: true }
genericBreadcrumb
:: { onNavigate :: Nullable (EffectFn1 URL Unit)
, items ::
NonEmptyArray
{ label :: String
, href :: URL
}
, compact :: Boolean
}
-> JSX
genericBreadcrumb = makeStateless (createComponent "Breadcrumb") render
where
lumiBreadcrumb = element (unsafePerformEffect $ R.unsafeCreateDOMComponent "lumi-breadcrumb")
render props@{ compact } =
lumiBreadcrumb
{ class: guard compact "compact"
, children:
intercalate separator $
if compact then
renderCompactVariant props
else
renderNormalVariant props
}
renderNormalVariant { items, onNavigate } =
let
{ init, last } = NEA.unsnoc items
in
map (pure <<< toLink onNavigate) init <> [ [ R.span_ [ R.text last.label ] ] ]
renderCompactVariant { items, onNavigate } =
let
{ head, tail } = NEA.uncons items
in
if null tail then
[ backLink onNavigate head ] : map (pure <<< toLink onNavigate) tail
else
NEA.toArray $ map (pure <<< toLink onNavigate) items
backLink onNavigate { label, href } =
Link.link Link.defaults
{ className = Just "lumi-breadcrumb-back"
, href = href
, text = R.text label
, navigate = do
n <- toMaybe onNavigate
pure (runEffectFn1 n href)
}
toLink onNavigate { label, href } =
Link.link Link.defaults
{ href = href
, text = R.text label
, navigate = do
n <- toMaybe onNavigate
pure (runEffectFn1 n href)
}
separator =
[ R.span
{ className: "lumi-breadcrumb-separator"
, children: [ R.text "/" ]
}
]
styles :: JSS
styles = jss
{ "@global":
{ "lumi-breadcrumb":
{ fontSize: "20px"
, lineHeight: "32px"
, fontWeight: "400"
, color: cssStringHSLA colors.black1
, "& > :last-child": { color: cssStringHSLA colors.black }
, "&.compact":
{ fontSize: "14px"
, lineHeight: "20px"
, "& :last-child": { color: cssStringHSLA colors.black1 }
}
, "& > a.lumi, & > a.lumi:visited":
{ color: cssStringHSLA colors.black1
, "&:hover":
{ color: cssStringHSLA colors.black
, textDecoration: "none"
}
}
, "& > a.lumi:hover": { textDecoration: "none" }
, "& > .lumi-breadcrumb-separator": { margin: "0 10px" }
, "& > a.lumi-breadcrumb-back":
{ "&:hover::before":
{ borderColor: cssStringHSLA colors.black
}
, "&::before":
{ display: "inline-block"
, content: "\"\""
, verticalAlign: "baseline"
, borderTop: [ "1px", "solid", cssStringHSLA colors.black1 ]
, borderRight: "none"
, borderBottom: "none"
, borderLeft: [ "1px", "solid", cssStringHSLA colors.black1 ]
, transform: "rotate(-45deg)"
, width: "8px"
, height: "8px"
, margin: "0 7px 0 2px"
}
}
}
}
}