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/*
* Copyright (c) 2017-present Robert Jaros
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package pl.treksoft.kvision.react
import com.github.snabbdom.VNode
import org.w3c.dom.HTMLElement
import pl.treksoft.kvision.KVManagerReact
import pl.treksoft.kvision.core.Container
import pl.treksoft.kvision.core.Widget
import pl.treksoft.kvision.state.ObservableState
import pl.treksoft.kvision.utils.set
import react.RBuilder
import react.dom.render as ReactRender
/**
* React component for KVision with support for state holder.
* @param S state type
* @param classes a set of CSS class names
* @param builder a builder function for external react components with support for the state holder.
*/
class React<S>(
state: S,
classes: Set<String> = setOf(),
private val builder: RBuilder.(getState: () -> S, changeState: ((S) -> S) -> Unit) -> Unit
) : Widget(classes), ObservableState<S> {
private val observers = mutableListOf<(S) -> Unit>()
var state = state
set(value) {
field = value
refreshFunction?.invoke()
observers.forEach { it(state) }
}
private var refreshFunction: (() -> Unit)? = null
@Suppress("UnsafeCastFromDynamic")
internal constructor(
classes: Set<String> = setOf(),
builder: RBuilder.(getState: () -> S, changeState: ((S) -> S) -> Unit) -> Unit
) : this(js("{}"), classes, builder)
override fun afterInsert(node: VNode) {
ReactRender(node.elm as HTMLElement) {
reactComponent {
this.renderFunction = { rBuilder, refresh ->
refreshFunction = refresh
rBuilder.builder({ state }) { changeState: (S) -> S ->
state = changeState(state)
refresh()
}
}
}
}
}
override fun afterDestroy() {
vnode?.elm?.let {
KVManagerReact.reactDom.unmountComponentAtNode(it)
}
}
override fun getState(): S = state
override fun subscribe(observer: (S) -> Unit): () -> Unit {
observers += observer
observer(state)
return {
observers -= observer
}
}
}
/**
* DSL builder extension function.
*
* It takes the same parameters as the constructor of the built component.
*/
fun <S> Container.react(
state: S,
classes: Set<String>? = null,
className: String? = null,
builder: RBuilder.(getState: () -> S, changeState: ((S) -> S) -> Unit) -> Unit
): React<S> {
val react = React(state, classes ?: className.set, builder)
this.add(react)
return react
}
/**
* DSL builder extension function.
*
* It takes the same parameters as the constructor of the built component.
*/
fun Container.react(
classes: Set<String>? = null,
className: String? = null,
builder: RBuilder.() -> Unit
): React<dynamic> {
val fullBuilder = fun RBuilder.(_: () -> dynamic, _: ((dynamic) -> dynamic) -> Unit) {
this.builder()
}
val react = React(classes ?: className.set, fullBuilder)
this.add(react)
return react
}
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