Refactor PistionStructureResolver API for better Compatiblity (#1775)

* Implement better handling for custom block interactions within the `PistionStructureResolver`

- Switch to a opt in system for piston interaction methods by moving to a dedicated interface and removing mixin that injects such into every block
- Default to vanilla code for slime blocks and honey blocks behavior.
- Keep `BlockBehaviourInterface` and `BlockBehaviour_customStickyMixin` for compatibility reasons

src/main/java/carpet/fakes/BlockBehaviourInterface.java

@@ -1,20 +0,0 @@
-package carpet.fakes;
-
-import net.minecraft.core.BlockPos;
-import net.minecraft.core.Direction;
-import net.minecraft.world.level.Level;
-import net.minecraft.world.level.block.state.BlockState;
-
-public interface BlockBehaviourInterface {
-
-    /**
-     * @return whether this block is sticky in any way when moved by pistons
-     */
-    public boolean isSticky(BlockState state);
-
-    /**
-     * @return whether the neighboring block is pulled along if this block is moved by pistons
-     */
-    public boolean isStickyToNeighbor(Level level, BlockPos pos, BlockState state, BlockPos neighborPos, BlockState neighborState, Direction dir, Direction moveDir);
-
-}

src/main/java/carpet/fakes/BlockPistonBehaviourInterface.java

@@ -0,0 +1,28 @@
+package carpet.fakes;
+
+import carpet.mixins.PistonStructureResolver_customStickyMixin;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.piston.PistonStructureResolver;
+import net.minecraft.world.level.block.state.BlockState;
+
+/**
+ * Opt-in Interface that allows for more control on a blocks interaction within the {@link PistonStructureResolver} via {@link PistonStructureResolver_customStickyMixin}
+ */
+public interface BlockPistonBehaviourInterface {
+
+    /**
+     * @return whether this block is sticky in any way when moved by pistons
+     */
+    default boolean isSticky(BlockState state) {
+        return false;
+    }
+
+    /**
+     * @return whether the neighboring block is pulled along if this block is moved by pistons
+     */
+    default boolean isStickyToNeighbor(Level level, BlockPos pos, BlockState state, BlockPos neighborPos, BlockState neighborState, Direction dir, Direction moveDir) {
+        return false;
+    }
+}

src/main/java/carpet/mixins/BlockBehaviour_customStickyMixin.java

@@ -1,25 +0,0 @@
-package carpet.mixins;
-
-import org.spongepowered.asm.mixin.Mixin;
-
-import carpet.fakes.BlockBehaviourInterface;
-
-import net.minecraft.core.BlockPos;
-import net.minecraft.core.Direction;
-import net.minecraft.world.level.Level;
-import net.minecraft.world.level.block.state.BlockBehaviour;
-import net.minecraft.world.level.block.state.BlockState;
-
-@Mixin(BlockBehaviour.class)
-public class BlockBehaviour_customStickyMixin implements BlockBehaviourInterface {
-
-    @Override
-    public boolean isSticky(BlockState state) {
-        return false;
-    }
-
-    @Override
-    public boolean isStickyToNeighbor(Level level, BlockPos pos, BlockState state, BlockPos neighborPos, BlockState neighborState, Direction dir, Direction moveDir) {
-        return false;
-    }
-}

src/main/java/carpet/mixins/ChainBlock_customStickyMixin.java

@@ -1,10 +1,10 @@
 package carpet.mixins;
 
+import carpet.fakes.BlockPistonBehaviourInterface;
 import org.spongepowered.asm.mixin.Mixin;
 
 import carpet.CarpetSettings;
 import carpet.CarpetSettings.ChainStoneMode;
-import carpet.fakes.BlockBehaviourInterface;
 
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -17,7 +17,7 @@ import net.minecraft.world.level.block.EndRodBlock;
 import net.minecraft.world.level.block.state.BlockState;
 
 @Mixin(ChainBlock.class)
-public class ChainBlock_customStickyMixin implements BlockBehaviourInterface {
+public class ChainBlock_customStickyMixin implements BlockPistonBehaviourInterface {
 
     @Override
     public boolean isSticky(BlockState state) {

src/main/java/carpet/mixins/ChestBlock_customStickyMixin.java

@@ -1,9 +1,9 @@
 package carpet.mixins;
 
+import carpet.fakes.BlockPistonBehaviourInterface;
 import org.spongepowered.asm.mixin.Mixin;
 
 import carpet.CarpetSettings;
-import carpet.fakes.BlockBehaviourInterface;
 
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -16,7 +16,7 @@ import net.minecraft.world.level.block.state.properties.ChestType;
 import static net.minecraft.world.level.block.ChestBlock.getConnectedDirection;
 
 @Mixin(ChestBlock.class)
-public class ChestBlock_customStickyMixin implements BlockBehaviourInterface {
+public class ChestBlock_customStickyMixin implements BlockPistonBehaviourInterface {
 
     @Override
     public boolean isSticky(BlockState state) {
@@ -35,6 +35,7 @@ public class ChestBlock_customStickyMixin implements BlockBehaviourInterface {
         if (type == ChestType.SINGLE || neighborType == ChestType.SINGLE) {
             return false;
         }
+
         return getConnectedDirection(state) == dir;
     }
 }

src/main/java/carpet/mixins/HoneyBlock_customStickyMixin.java

@@ -1,26 +0,0 @@
-package carpet.mixins;
-
-import org.spongepowered.asm.mixin.Mixin;
-
-import carpet.fakes.BlockBehaviourInterface;
-
-import net.minecraft.core.BlockPos;
-import net.minecraft.core.Direction;
-import net.minecraft.world.level.Level;
-import net.minecraft.world.level.block.Blocks;
-import net.minecraft.world.level.block.HoneyBlock;
-import net.minecraft.world.level.block.state.BlockState;
-
-@Mixin(HoneyBlock.class)
-public class HoneyBlock_customStickyMixin implements BlockBehaviourInterface {
-
-    @Override
-    public boolean isSticky(BlockState state) {
-        return true;
-    }
-
-    @Override
-    public boolean isStickyToNeighbor(Level level, BlockPos pos, BlockState state, BlockPos neighborPos, BlockState neighborState, Direction dir, Direction moveDir) {
-        return !neighborState.is(Blocks.SLIME_BLOCK);
-    }
-}

src/main/java/carpet/mixins/PistonStructureResolver_customStickyMixin.java

@@ -3,13 +3,14 @@ package carpet.mixins;
 import org.spongepowered.asm.mixin.Final;
 import org.spongepowered.asm.mixin.Mixin;
 import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;
 import org.spongepowered.asm.mixin.injection.Redirect;
 import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
 import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
 
-import carpet.fakes.BlockBehaviourInterface;
+import carpet.fakes.BlockPistonBehaviourInterface;
 
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -18,11 +19,13 @@ import net.minecraft.world.level.block.piston.PistonStructureResolver;
 import net.minecraft.world.level.block.state.BlockState;
 
 @Mixin(PistonStructureResolver.class)
-public class PistonStructureResolver_customStickyMixin {
+public abstract class PistonStructureResolver_customStickyMixin {
 
     @Shadow @Final private Level level;
     @Shadow @Final private Direction pushDirection;
 
+    @Shadow private static boolean canStickToEachOther(BlockState blockState, BlockState blockState2) { return false; }
+
     @Inject(
         method = "isSticky",
         cancellable = true,
@@ -31,12 +34,14 @@ public class PistonStructureResolver_customStickyMixin {
         )
     )
     private static void isSticky(BlockState state, CallbackInfoReturnable<Boolean> cir) {
-        cir.setReturnValue(((BlockBehaviourInterface)state.getBlock()).isSticky(state));
+        if(state.getBlock() instanceof BlockPistonBehaviourInterface behaviourInterface){
+            cir.setReturnValue(behaviourInterface.isSticky(state));
+        }
     }
 
     // fields that are needed because @Redirects cannot capture locals
-    private BlockPos pos_addBlockLine;
-    private BlockPos behindPos_addBlockLine;
+    @Unique private BlockPos pos_addBlockLine;
+    @Unique private BlockPos behindPos_addBlockLine;
 
     @Inject(
         method = "addBlockLine",
@@ -60,12 +65,16 @@ public class PistonStructureResolver_customStickyMixin {
         )
     )
     private boolean onAddBlockLineCanStickToEachOther(BlockState state, BlockState behindState) {
-        return ((BlockBehaviourInterface)state.getBlock()).isStickyToNeighbor(level, pos_addBlockLine, state, behindPos_addBlockLine, behindState, pushDirection.getOpposite(), pushDirection);
+        if (state.getBlock() instanceof BlockPistonBehaviourInterface behaviourInterface) {
+            return behaviourInterface.isStickyToNeighbor(level, pos_addBlockLine, state, behindPos_addBlockLine, behindState, pushDirection.getOpposite(), pushDirection);
+        }
+
+        return canStickToEachOther(state, behindState);
     }
 
     // fields that are needed because @Redirects cannot capture locals
-    private Direction dir_addBranchingBlocks;
-    private BlockPos neighborPos_addBranchingBlocks;
+    @Unique private Direction dir_addBranchingBlocks;
+    @Unique private BlockPos neighborPos_addBranchingBlocks;
 
     @Inject(
         method = "addBranchingBlocks",
@@ -89,6 +98,10 @@ public class PistonStructureResolver_customStickyMixin {
         )
     )
     private boolean onAddBranchingBlocksCanStickToEachOther(BlockState neighborState, BlockState state, BlockPos pos) {
-        return ((BlockBehaviourInterface)state.getBlock()).isStickyToNeighbor(level, pos, state, neighborPos_addBranchingBlocks, neighborState, dir_addBranchingBlocks, pushDirection);
+        if (state.getBlock() instanceof BlockPistonBehaviourInterface behaviourInterface) {
+            return behaviourInterface.isStickyToNeighbor(level, pos, state, neighborPos_addBranchingBlocks, neighborState, dir_addBranchingBlocks, pushDirection);
+        }
+
+        return canStickToEachOther(neighborState, state);
     }
 }

src/main/java/carpet/mixins/SlimeBlock_customStickyMixin.java

@@ -1,26 +0,0 @@
-package carpet.mixins;
-
-import org.spongepowered.asm.mixin.Mixin;
-
-import carpet.fakes.BlockBehaviourInterface;
-
-import net.minecraft.core.BlockPos;
-import net.minecraft.core.Direction;
-import net.minecraft.world.level.Level;
-import net.minecraft.world.level.block.Blocks;
-import net.minecraft.world.level.block.SlimeBlock;
-import net.minecraft.world.level.block.state.BlockState;
-
-@Mixin(SlimeBlock.class)
-public class SlimeBlock_customStickyMixin implements BlockBehaviourInterface {
-
-    @Override
-    public boolean isSticky(BlockState state) {
-        return true;
-    }
-
-    @Override
-    public boolean isStickyToNeighbor(Level level, BlockPos pos, BlockState state, BlockPos neighborPos, BlockState neighborState, Direction dir, Direction moveDir) {
-        return !neighborState.is(Blocks.HONEY_BLOCK);
-    }
-}

src/main/resources/carpet.mixins.json

@@ -178,13 +178,11 @@
     "SculkSensorBlockEntityVibrationConfig_sculkSensorRangeMixin",
     "CollectingNeighborUpdaterAccessor",
 
-    "BlockBehaviour_customStickyMixin",
     "BlockBehaviourBlockStateBase_mixin",
     "ChainBlock_customStickyMixin",
     "ChestBlock_customStickyMixin",
-    "HoneyBlock_customStickyMixin",
-    "PistonStructureResolver_customStickyMixin",
-    "SlimeBlock_customStickyMixin"
+    "PistonStructureResolver_customStickyMixin"
+
   ],
   "client": [
     "ClientLevel_tickSpeedMixin",