adding support 1.13 new Material class with new Minecraft Items render for Menu Preview

src/main/kotlin/br/com/devsrsouza/kotlinbukkitapi/tooling/menu/Declaration.kt

@@ -7,8 +7,8 @@ data class MenuDeclaration(
 )
 
 data class MenuSlotDeclaration(
-    val line: Int,
-    val slot: Int,
-    val itemId: Int?,
-    val isSelected: Boolean = false
+        val line: Int,
+        val slot: Int,
+        val item: String,
+        val isSelected: Boolean = false
 )

src/main/kotlin/br/com/devsrsouza/kotlinbukkitapi/tooling/menu/InventoryComponent.kt

@@ -17,6 +17,7 @@ class InventoryComponent(
         private val minecraftFontResource = "/assets/fonts/Minecraftia-Regular.ttf"
         private val spritesFolder = "/assets/sprites"
         private val itemsSpriteFolder = "/assets/items"
+        private val items13SpriteFolder = "/assets/items-13"
 
         // the selected-border is 36x36 and not 32x32
         private val selectedBorderSizeDiff = 2
@@ -34,8 +35,14 @@ class InventoryComponent(
     private val itemsImage = declaration.slots.filter {
         it.line in 1..declaration.lines && it.slot in 1..9
     }.keysToMap {
-        ImageLoader.loadFromResource("$itemsSpriteFolder/${it.itemId}-0.png")
-            //?.getScaledInstance(16, 16, Image.SCALE_FAST)
+        val item = runCatching { MinecraftItem.valueOf(it.item) }.getOrNull()
+
+        if(item != null) {
+            // TODO: Support data
+            ImageLoader.loadFromResource("$itemsSpriteFolder/${item.id}-0.png")
+        } else {
+            ImageLoader.loadFromResource("$items13SpriteFolder/${it.item.toLowerCase()}.png")
+        }
     }
     private val selectionImage = if(declaration.slots.any { it.isSelected })
         ImageLoader.loadFromResource("$spritesFolder/selected-border.png")

src/main/kotlin/br/com/devsrsouza/kotlinbukkitapi/tooling/menu/PsiUtils.kt

@@ -68,14 +68,12 @@ fun findMenuDeclaration(
         val typeExpression = materialExpression.selectorExpression as? KtNameReferenceExpression ?: return@mapNotNull null
         val materialName = typeExpression.text ?: return@mapNotNull null
 
-        val item = runCatching { MinecraftItem.valueOf(materialName) }.getOrNull()
-
         val isSelected = it.getLineNumber() == currentSelectedLine
 
         MenuSlotDeclaration(
             line,
             slot,
-            item?.id,
+            materialName,
             isSelected
         )
     }