Migrate Carpet Mixin names to mojang mappings

src/main/java/carpet/mixins/PistonMovingBlockEntity_playerHandlingMixin.java

@@ -0,0 +1,69 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import carpet.patches.EntityPlayerMPFake;
+import net.minecraft.core.BlockPos;
+import net.minecraft.core.Direction;
+import net.minecraft.world.entity.Entity;
+import net.minecraft.world.entity.player.Player;
+import net.minecraft.world.level.Level;
+import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.piston.PistonMovingBlockEntity;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.material.PushReaction;
+import net.minecraft.world.phys.Vec3;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+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.CallbackInfo;
+
+@Mixin(PistonMovingBlockEntity.class)
+public abstract class PistonMovingBlockEntity_playerHandlingMixin
+{
+
+    @Inject(method = "moveEntityByPiston", at = @At("HEAD"), cancellable = true)
+    private static void dontPushSpectators(Direction direction, Entity entity, double d, Direction direction2, CallbackInfo ci)
+    {
+        if (CarpetSettings.creativeNoClip && entity instanceof Player && (((Player) entity).isCreative()) && ((Player) entity).getAbilities().flying) ci.cancel();
+    }
+
+    @Redirect(method = "moveCollidedEntities", at = @At(value = "INVOKE", target = "Lnet/minecraft/world/entity/Entity;setDeltaMovement(DDD)V"))
+    private static void ignoreAccel(Entity entity, double x, double y, double z)
+    {
+        if (CarpetSettings.creativeNoClip && entity instanceof Player && (((Player) entity).isCreative()) && ((Player) entity).getAbilities().flying) return;
+        entity.setDeltaMovement(x,y,z);
+    }
+
+    @Redirect(method = "moveCollidedEntities", at = @At(
+            value = "INVOKE",
+            target = "Lnet/minecraft/world/entity/Entity;getPistonPushReaction()Lnet/minecraft/world/level/material/PushReaction;"
+    ))
+    private static PushReaction moveFakePlayers(Entity entity,
+        Level world, BlockPos blockPos, float ff, PistonMovingBlockEntity pistonBlockEntity)
+    {
+        if (entity instanceof EntityPlayerMPFake && pistonBlockEntity.getMovedState().is(Blocks.SLIME_BLOCK))
+        {
+            Vec3 vec3d = entity.getDeltaMovement();
+            double e = vec3d.x;
+            double f = vec3d.y;
+            double g = vec3d.z;
+            Direction direction = pistonBlockEntity.getMovementDirection();
+            switch(direction.getAxis()) {
+                case X:
+                    e = direction.getStepX();
+                    break;
+                case Y:
+                    f = direction.getStepY();
+                    break;
+                case Z:
+                    g = direction.getStepZ();
+            }
+
+            entity.setDeltaMovement(e, f, g);
+        }
+        return entity.getPistonPushReaction();
+    }
+
+}