feat: tile redirect rework

gradle.properties

@@ -15,6 +15,6 @@ kotlin_version=2.0.21
 fabric_kotlin_version=1.12.3
 
 # mod properties
-mod_version=1.4.2
+mod_version=1.5
 maven_group=net.mcbrawls
 mod_id=slate

src/main/kotlin/net/mcbrawls/slate/Slate.kt

@@ -138,6 +138,14 @@ open class Slate {
         return slate.apply(builder)
     }
 
+    /**
+     * Modifies the given slate to be a subslate of this slate.
+     */
+    fun subslate(slate: Slate): Slate {
+        slate.parent = this
+        return slate
+    }
+
     operator fun get(tileIndex: Int): Tile? {
         val x = tileIndex % tiles.width
         val y = tileIndex / tiles.width

src/main/kotlin/net/mcbrawls/slate/tile/RedirectType.kt

@@ -0,0 +1,13 @@
+package net.mcbrawls.slate.tile
+
+enum class RedirectType {
+    /**
+     * Redirects the entire tile.
+     */
+    NORMAL,
+
+    /**
+     * Redirects the tile, hiding the stack at the new location.
+     */
+    INVISIBLE
+}

src/main/kotlin/net/mcbrawls/slate/tile/RedirectedTile.kt

@@ -0,0 +1,17 @@
+package net.mcbrawls.slate.tile
+
+import net.mcbrawls.slate.Slate
+import net.minecraft.item.ItemStack
+import net.minecraft.server.network.ServerPlayerEntity
+
+class RedirectedTile(
+    val parent: Tile,
+    val type: RedirectType,
+) : Tile() {
+    override fun createDisplayedStack(slate: Slate, player: ServerPlayerEntity): ItemStack {
+        return when (type) {
+            RedirectType.NORMAL -> parent.createDisplayedStack(slate, player)
+            RedirectType.INVISIBLE -> ItemStack.EMPTY
+        }
+    }
+}

src/main/kotlin/net/mcbrawls/slate/tile/Tile.kt

@@ -19,7 +19,7 @@ import net.minecraft.util.Identifier
 /**
  * A slot within a slate.
  */
-abstract class Tile {
+open class Tile {
     /**
      * The complete tooltip of the tile stack.
      * The first element is the name, and the rest is flushed to the tooltip.
@@ -128,7 +128,9 @@ abstract class Tile {
     /**
      * The base item stack to be displayed.
      */
-    abstract fun createBaseStack(slate: Slate, player: ServerPlayerEntity): ItemStack
+    open fun createBaseStack(slate: Slate, player: ServerPlayerEntity): ItemStack {
+        return ItemStack.EMPTY
+    }
 
     /**
      * Creates the final displayed stack for this tile.

src/main/kotlin/net/mcbrawls/slate/tile/TileGrid.kt

@@ -16,7 +16,7 @@ open class TileGrid(val width: Int, val height: Int) {
     /**
      * Redirects a tile index to another tile index.
      */
-    val redirects: MutableMap<Int, Int> = mutableMapOf()
+    val redirects: MutableMap<Int, Pair<Int, RedirectType>> = mutableMapOf()
 
     /**
      * The total size of all tiles.
@@ -71,8 +71,13 @@ open class TileGrid(val width: Int, val height: Int) {
      * Gets a slot tile from the given index.
      */
     operator fun get(index: Int): Tile? {
-        val trueIndex = redirects[index] ?: index
-        return tiles.getOrNull(trueIndex)
+        redirects[index]?.also { (trueIndex, type) ->
+            tiles.getOrNull(trueIndex)?.also { tile ->
+                return RedirectedTile(tile, type)
+            }
+        }
+
+        return tiles.getOrNull(index)
     }
 
     /**
@@ -108,8 +113,8 @@ open class TileGrid(val width: Int, val height: Int) {
     /**
      * Sets a redirect on this tile grid.
      */
-    fun redirect(index: Int, otherIndex: Int) {
-        redirects[index] = otherIndex
+    fun redirect(index: Int, otherIndex: Int, type: RedirectType = RedirectType.NORMAL) {
+        redirects[index] = otherIndex to type
     }
 
     fun forEach(action: (Int, Tile?) -> Unit) {