Coverage Summary for Class: SpecificKeyUpKt (kweb.plugins.specificKeyUp)

 package kweb.plugins.specificKeyUp
 
 import kotlinx.serialization.json.JsonPrimitive
 import kweb.Element
 import kweb.InputElement
 import kweb.html.events.KeyboardEvent
 import kweb.html.events.OnImmediateReceiver
 import kweb.html.events.OnReceiver
 import kweb.plugins.KwebPlugin
 import kweb.util.json
 
 /**
  * @author sanity
  *
  * This plugin allows registering a listener on a specific key to avoid sending all `keyup` events
  * to the backend.
  */
 object SpecificKeyUpPlugin : KwebPlugin()
 
 private const val ENTER_PRESSED_EVENT_ATTACHED_FLAG = "enterPressedEventAttached"
 
 fun InputElement.attachKeySpecificKeyupEvent(vararg keys: String) {
     require(keys.isNotEmpty()) { "You must supply at least one key" }
     require(ENTER_PRESSED_EVENT_ATTACHED_FLAG !in flags) { "KeySpecificKeyupEvent may only be attached once per element" }
     flags += ENTER_PRESSED_EVENT_ATTACHED_FLAG
     // language=JavaScript
     this.browser.callJsFunction(
         """
     let id = {};
     var keys = {};
     let element = document.getElementById(id);
     element.addEventListener("keyup", function(origEvent) {
         if (keys.includes(origEvent.key)) {
                 if (window.CustomEvent) {
                   var keySpecificKeyUpEvent = new CustomEvent('keySpecificKeyUpEvent');
                 } else {
                 var keySpecificKeyUpEvent = document.createEvent('keySpecificKeyUpEvent');
                 enterPressedEvent.initCustomEvent('keySpecificKeyUpEvent', true, true, origEvent);
                 }
             element.dispatchEvent(keySpecificKeyUpEvent);
         }
     });
 """.trimIndent(), id.json, JsonPrimitive(keys.joinToString(separator = ","))
     )
 }
 
 fun OnReceiver<Element>.keySpecificKeyup(callback: (event: KeyboardEvent) -> Unit): Element {
     require(source.flags.contains(ENTER_PRESSED_EVENT_ATTACHED_FLAG)) { "InputElement.attachKeySpecificKeyupEvent() must be called before listening for keySpecificKeyup" }
     return this.event("keySpecificKeyUpEvent", callback = callback)
 }
 
 fun OnImmediateReceiver<Element>.keySpecificKeyup(callback: () -> Unit): Element {
     require(source.flags.contains(ENTER_PRESSED_EVENT_ATTACHED_FLAG)) { "InputElement.attachKeySpecificKeyupEvent() must be called before listening for keySpecificKeyup" }
     return event("keySpecificKeyUpEvent", callback = callback)
 }