Add protection against double clicking item types

Author: Aeltumn

examples/src/main/kotlin/com/noxcrew/interfaces/example/ChangingTitleExampleInterface.kt

@@ -32,7 +32,7 @@ public class ChangingTitleExampleInterface : RegistrableInterface {
                 number += 1
             }
 
-            pane[0, 6] = StaticElement(drawable(Material.COMPASS))
+            pane[0, 6] = StaticElement(drawable(Material.ACACIA_SIGN))
         }
     }
 }

interfaces/src/main/kotlin/com/noxcrew/interfaces/InterfacesListeners.kt

@@ -265,10 +265,32 @@ public class InterfacesListeners private constructor(private val plugin: Plugin)
                 }
             }
 
+            // Prevent double-clicking if it involves stealing any items
+            val topInventory = event.view.topInventory
+            val bottomInventory = event.view.bottomInventory
+            if (event.click == ClickType.DOUBLE_CLICK) {
+                val clickedItem = event.currentItem ?: ItemStack.empty()
+                val isInPlayerInventory = holder is Player
+
+                // Don't check top inventory if we're in the player inventory!
+                if (
+                    (!isInPlayerInventory && topInventory.withIndex().any { (index, it) ->
+                        // Check if any item is being collected that cannot be moved!
+                        it.isSimilar(clickedItem) && !canFreelyMove(view, requireNotNull(GridPoint.fromBukkitChestSlot(index)), false)
+                    }) ||
+                    bottomInventory.withIndex().any { (index, it) ->
+                        it.isSimilar(clickedItem) &&
+                                // These slots are always in the player inventory and always need to be relativized!
+                                !canFreelyMove(view, view.backing.relativizePlayerInventorySlot(requireNotNull(GridPoint.fromBukkitPlayerSlot(index))), true)
+                    }
+                ) {
+                    event.isCancelled = true
+                    return
+                }
+            }
+
             // If it's a shift click we have to detect what slot is being edited
             if (event.click.isShiftClick && event.clickedInventory != null) {
-                val topInventory = event.view.topInventory
-                val bottomInventory = event.view.bottomInventory
                 val clickedInventory = event.clickedInventory!!
                 val otherInventory = if (clickedInventory == topInventory) bottomInventory else topInventory