add a blacklist mode to the adept hopper

src/main/java/de/ellpeck/naturesaura/blocks/BlockGratedChute.java

@@ -10,6 +10,7 @@ import net.minecraft.block.state.BlockStateContainer;
 import net.minecraft.block.state.IBlockState;
 import net.minecraft.entity.Entity;
 import net.minecraft.entity.EntityLivingBase;
+import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.*;
@@ -41,6 +42,21 @@ public class BlockGratedChute extends BlockContainerImpl {
         this.setSoundType(SoundType.METAL);
     }
 
+    @Override
+    public boolean onBlockActivated(World worldIn, BlockPos pos, IBlockState state, EntityPlayer playerIn, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
+        if (!playerIn.isSneaking())
+            return false;
+        TileEntity tile = worldIn.getTileEntity(pos);
+        if (!(tile instanceof TileEntityGratedChute))
+            return false;
+        if (!worldIn.isRemote) {
+            TileEntityGratedChute chute = (TileEntityGratedChute) tile;
+            chute.isBlacklist = !chute.isBlacklist;
+            chute.sendToClients();
+        }
+        return true;
+    }
+
     @Override
     public AxisAlignedBB getBoundingBox(IBlockState state, IBlockAccess source, BlockPos pos) {
         return FULL_BLOCK_AABB;

src/main/java/de/ellpeck/naturesaura/blocks/tiles/TileEntityGratedChute.java

@@ -27,10 +27,10 @@ public class TileEntityGratedChute extends TileEntityImpl implements ITickable {
 
         @Override
         protected boolean canInsert(ItemStack stack, int slot) {
-            return TileEntityGratedChute.this.isItemInFrame(stack);
+            return TileEntityGratedChute.this.isBlacklist != TileEntityGratedChute.this.isItemInFrame(stack);
         }
     };
-
+    public boolean isBlacklist;
     private int cooldown;
 
     @Override
@@ -111,7 +111,7 @@ public class TileEntityGratedChute extends TileEntityImpl implements ITickable {
     private boolean isItemInFrame(ItemStack stack) {
         List<EntityItemFrame> frames = Helper.getAttachedItemFrames(this.world, this.pos);
         if (frames.isEmpty())
-            return true;
+            return false;
         for (EntityItemFrame frame : frames) {
             ItemStack frameStack = frame.getDisplayedItem();
             if (Helper.areItemsEqual(stack, frameStack, true)) {
@@ -127,6 +127,7 @@ public class TileEntityGratedChute extends TileEntityImpl implements ITickable {
         if (type != SaveType.BLOCK) {
             compound.setInteger("cooldown", this.cooldown);
             compound.setTag("items", this.items.serializeNBT());
+            compound.setBoolean("blacklist", this.isBlacklist);
         }
     }
 
@@ -136,6 +137,7 @@ public class TileEntityGratedChute extends TileEntityImpl implements ITickable {
         if (type != SaveType.BLOCK) {
             this.cooldown = compound.getInteger("cooldown");
             this.items.deserializeNBT(compound.getCompoundTag("items"));
+            this.isBlacklist = compound.getBoolean("blacklist");
         }
     }
 

src/main/java/de/ellpeck/naturesaura/events/ClientEvents.java

@@ -26,6 +26,7 @@ import net.minecraft.client.gui.ScaledResolution;
 import net.minecraft.client.renderer.GlStateManager;
 import net.minecraft.client.resources.I18n;
 import net.minecraft.entity.Entity;
+import net.minecraft.init.Items;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.ResourceLocation;
@@ -59,6 +60,7 @@ import java.util.Map;
 public class ClientEvents {
 
     public static final ResourceLocation OVERLAYS = new ResourceLocation(NaturesAura.MOD_ID, "textures/gui/overlays.png");
+    private static final ItemStack ITEM_FRAME = new ItemStack(Items.ITEM_FRAME);
     private static final Map<ResourceLocation, Tuple<ItemStack, Boolean>> SHOWING_EFFECTS = new HashMap<>();
     private static ItemStack heldCache = ItemStack.EMPTY;
     private static ItemStack heldEye = ItemStack.EMPTY;
@@ -412,7 +414,8 @@ public class ClientEvents {
                                         mc, res, 35, I18n.format("tile.naturesaura.rf_converter.name"),
                                         storage.getEnergyStored() + " / " + storage.getMaxEnergyStored() + " RF");
                             } else if (tile instanceof TileEntityGratedChute) {
-                                ItemStack stack = ((TileEntityGratedChute) tile).getItemHandler(null).getStackInSlot(0);
+                                TileEntityGratedChute chute = (TileEntityGratedChute) tile;
+                                ItemStack stack = chute.getItemHandler(null).getStackInSlot(0);
 
                                 int x = res.getScaledWidth() / 2;
                                 int y = res.getScaledHeight() / 2;
@@ -422,6 +425,14 @@ public class ClientEvents {
                                             x + 5, y - 11, 0xFFFFFF, true);
                                 else
                                     Helper.renderItemInGui(stack, x + 2, y - 18, 1F);
+
+
+                                Helper.renderItemInGui(ITEM_FRAME, x - 24, y - 24, 1F);
+                                mc.getTextureManager().bindTexture(OVERLAYS);
+                                int u = chute.isBlacklist ? 240 : 224;
+                                GlStateManager.disableDepth();
+                                Gui.drawModalRectWithCustomSizedTexture(x - 18, y - 18, u, 0, 16, 16, 256, 256);
+                                GlStateManager.enableDepth();
                             }
                         }
                     }

src/main/resources/assets/naturesaura/patchouli_books/book/en_us/entries/devices/grated_chute.json

@@ -12,6 +12,10 @@
             "type": "text",
             "text": "The $(item)Adept Hopper$() works just like a normal $(item)Hopper$(), except that it is a bit faster and that it can filter items as follows: Attaching any number of $(item)Item Frames$() to any side of it and placing items inside will cause $(thing)only those items$() to be let through. This counts both for pulling items from chests and the world and for having items inserted into it.$(p)It should additionally be noted that the $(l:using/hopper_upgrade)Hopper Enhancement$() can be combined with this to pick up only filtered items."
         },
+        {
+            "type": "text",
+            "text": "Additionally, the $(item)Adept Hopper$()'s functionality can be $(thing)inverted$() simply by interacting with it while sneaking: This will cause not items $(italic)in$() the frames to be accepted, but all items that are $(italic)not$() in the frames. This, additionally, allows for throughput of any item, simply by not placing down any frames at all."
+        },
         {
             "type": "crafting",
             "text": "Creating the $(item)Adept Hopper$()$(p)It should be noted that, when equipping an $(l:items/eye)Environmental Eye$(), the amount of items currently stored in the hopper can be seen.",