Add Top-Level State and more Utils

Signed-off-by: Chaoscaot <max@maxsp.de>

KotlinCore/src/de/steamwar/kotlin/ui/TestInv.kt

@@ -26,7 +26,7 @@ import org.bukkit.inventory.ItemStack
 
 class TestInv(player: Player): UIInventory(player) {
 
-    override fun render() {
+    override fun view() {
         inventory(3, title = "TEST_TITLE") {
             group {
                 item {

KotlinCore/src/de/steamwar/kotlin/ui/UIInventory.kt

@@ -19,28 +19,28 @@
 
 package de.steamwar.kotlin.ui
 
-import de.steamwar.kotlin.KotlinCore
 import de.steamwar.kotlin.ui.context.WindowContext
-import net.kyori.adventure.text.event.ClickEvent
-import org.bukkit.Bukkit
 import org.bukkit.entity.Player
-import org.bukkit.event.EventHandler
-import org.bukkit.event.Listener
-import org.bukkit.event.inventory.InventoryClickEvent
-import org.bukkit.event.inventory.InventoryCloseEvent
 import org.bukkit.event.inventory.InventoryType
 
-abstract class UIInventory(val player: Player) {
-    lateinit var window: UIWindow
+abstract class UIInventory(val player: Player): RenderBoundary() {
+    var window: UIWindow? = null
 
-    abstract fun render()
+    abstract fun view()
 
     fun open() {
-        if (!::window.isInitialized) {
-            render()
+        if (window == null) {
+            view()
+            assert(window != null) { "View method must create a inventory" }
         }
 
-        window.open()
+        window!!.open()
+    }
+
+    override fun render() {
+        window?.onClose()
+        window = null
+        open()
     }
 
     protected fun inventory(size: Int, title: String, init: WindowContext.() -> Unit) {

KotlinCore/src/de/steamwar/kotlin/ui/UIWindow.kt

@@ -32,6 +32,7 @@ import org.bukkit.event.inventory.InventoryCloseEvent
 import org.bukkit.event.inventory.InventoryType
 import org.bukkit.inventory.Inventory
 import org.bukkit.inventory.InventoryHolder
+import org.bukkit.inventory.InventoryView
 
 class UIWindow(val player: Player, val render: WindowContext.() -> Unit): InventoryHolder {
     val onClicks = mutableMapOf<Int, (event: InventoryClickEvent) -> Unit>()

KotlinCore/src/de/steamwar/kotlin/util/ItemUtils.kt

@@ -32,7 +32,7 @@ fun ItemStack.count(count: Int) = apply { amount = count }
 
 fun ItemStack.name(name: Component) = apply { itemMeta = itemMeta.also { it.displayName(name) } }
 
-fun ItemStack.lore(lore: List<Component>) = apply { itemMeta = itemMeta.also { it.lore(lore) } }
+fun ItemStack.lored(lore: List<Component>) = apply { itemMeta = itemMeta.also { it.lore(lore) } }
 
 fun String.asMaterial(): Material = Material.matchMaterial(this) ?: Material.BARRIER