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• laminar_sjs0.6_2.13
• 0.7.2
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• DomEventStream.scala

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com.raquo.laminar.builders.DomEventStream.scala Maven / Gradle / Ivy

package com.raquo.laminar.builders

import com.raquo.airstream.core.Transaction
import com.raquo.airstream.eventstream.EventStream
import org.scalajs.dom

import scala.scalajs.js

// @TODO[API,Integrity] Use this for element events too
// @TODO[API] This could potentially replace EventPropTransformation
class DomEventStream[Ev <: dom.Event](
  eventTarget: dom.EventTarget,
  eventKey: String,
  useCapture: Boolean
) extends EventStream[Ev] {

  // @TODO[API] We need to figure out a better protection mechanism in Airstream, this only works for Laminar because it shares com.raquo with Airstream
  override protected[raquo] val topoRank: Int = 1

  val eventHandler: js.Function1[Ev, Unit] = ev => new Transaction(fireValue(ev, _))

  override protected[this] def onStart(): Unit = {
    eventTarget.addEventListener(eventKey, eventHandler, useCapture)
  }

  override protected[this] def onStop(): Unit = {
    eventTarget.removeEventListener(eventKey, eventHandler, useCapture)
  }
}