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package kweb.html.events | ||
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import java.util.* | ||
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interface EventGenerator<T> { | ||
fun addEventListener(eventName: String, returnEventFields: Set<String> = Collections.emptySet(), retrieveJs: String?, callback: (Any) -> Unit): T | ||
} |
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package kweb.html.events | ||
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import kweb.dom.element.events.ONReceiver | ||
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interface KeyboardEvents | ||
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fun <ON, T> ON.keypress(callback: (event: ONReceiver.KeyboardEvent) -> Unit) where ON: NewOnReceiver<T>, T: KeyboardEvents = | ||
event("keypress", eventType = ONReceiver.KeyboardEvent::class, callback = callback) |
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package kweb.html.events | ||
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import kweb.dom.element.events.ONReceiver | ||
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interface MouseEvents | ||
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fun <ON, T> ON.click(callback: (event: ONReceiver.MouseEvent) -> Unit) where ON: NewOnReceiver<T>, T: KeyboardEvents = | ||
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marad
Author
Owner
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event("click", eventType = ONReceiver.MouseEvent::class, callback = callback) |
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package kweb.html.events | ||
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import com.github.salomonbrys.kotson.fromJson | ||
import kweb.dom.element.events.ONReceiver | ||
import kweb.gson | ||
import mu.KotlinLogging | ||
import java.util.concurrent.ConcurrentHashMap | ||
import kotlin.reflect.KClass | ||
import kotlin.reflect.full.memberProperties | ||
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class NewOnReceiver<T : EventGenerator<T>>(private val source: T, private val retrieveJs: String? = null) { | ||
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val logger = KotlinLogging.logger {} | ||
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fun event(eventName: String, returnEventFields: Set<String> = emptySet(), callback: (event: String) -> Unit): T { | ||
source.addEventListener(eventName, returnEventFields = returnEventFields, callback = { callback(it.toString()) }, retrieveJs = retrieveJs) | ||
return source | ||
} | ||
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inline fun <reified U : Any> event(eventName: String, eventType: KClass<U>, crossinline callback: (event: U) -> Unit): T { | ||
// TODO: Should probably cache this rather than do the reflection every time | ||
val eventPropertyNames = memberProperties(eventType) | ||
return event(eventName, eventPropertyNames) { propertiesAsString -> | ||
val props: U = gson.fromJson(propertiesAsString) | ||
try { | ||
callback(props) | ||
} catch (e: Exception) { | ||
logger.error(e) { "Exception thrown by callback in response to $eventName event" } | ||
} | ||
} | ||
} | ||
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companion object { | ||
val memberPropertiesCache: ConcurrentHashMap<KClass<*>, Set<String>> = ConcurrentHashMap() | ||
inline fun <reified T : Any> memberProperties(clazz: KClass<T>) = | ||
memberPropertiesCache.get(clazz) | ||
?: T::class.memberProperties.map { it.name }.toSet().also { memberPropertiesCache.put(clazz, it) } | ||
} | ||
} |
Is
T: KeyboardEvents
correct here, or should it be MouseEvents?