Sequenced Gearshift screen "greys out" when being controlled by a computer

- This is to stop players from trying to using both the builtin sequencing and a computer to control the Sequenced Gearshift at the same time, leading to undefined behaviour
- The "greyed out" screen should have a message added explaining why it's greyed out.
- Added ComputerControllable#isComputerControlled to check if a tile entity is connected to a modem

src/main/java/com/simibubi/create/compat/Mods.java

@@ -5,7 +5,10 @@ import java.util.function.Supplier;
 
 import com.simibubi.create.foundation.utility.Lang;
 
+import net.minecraft.resources.ResourceLocation;
+import net.minecraft.world.level.block.Block;
 import net.minecraftforge.fml.ModList;
+import net.minecraftforge.registries.ForgeRegistries;
 
 /**
  * For compatibility with and without another mod present, we have to define load conditions of the specific code
@@ -51,4 +54,8 @@ public enum Mods {
 			toExecute.get().run();
 		}
 	}
+
+	public Block getBlock(String id) {
+		return ForgeRegistries.BLOCKS.getValue(new ResourceLocation(asId(), id));
+	}
 }

src/main/java/com/simibubi/create/compat/computercraft/ComputerControllable.java

@@ -2,7 +2,14 @@ package com.simibubi.create.compat.computercraft;
 
 import org.jetbrains.annotations.NotNull;
 
+import com.simibubi.create.compat.Mods;
+import com.simibubi.create.foundation.utility.Iterate;
+
 import dan200.computercraft.api.peripheral.IPeripheral;
+import net.minecraft.core.Direction;
+import net.minecraft.world.level.block.entity.BlockEntity;
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.block.state.properties.BooleanProperty;
 import net.minecraftforge.common.capabilities.Capability;
 import net.minecraftforge.common.capabilities.CapabilityManager;
 import net.minecraftforge.common.capabilities.CapabilityToken;
@@ -30,8 +37,27 @@ public interface ComputerControllable {
 	}
 
 	default void removePeripheral() {
-		if (getPeripheral() != null)
+		if (getPeripheral() != null) {
 			getPeripheral().invalidate();
 		}
+	}
+
+	default boolean isComputerControlled(BlockEntity tile) {
+		if (tile.getLevel() == null || !(tile instanceof ComputerControllable))
+			return false;
+
+		for (Direction direction : Iterate.directions) {
+			BlockState state = tile.getLevel().getBlockState(tile.getBlockPos().relative(direction));
+
+			// TODO: Add a check for "cable" wired modem.
+			//  The difficulty comes since the "cable" wired modem uses an enum property instead of a boolean property.
+			//  This could possibly be surpassed with reflection. It would be good to find a more solid solution.
+			if (state.getBlock().equals(Mods.COMPUTERCRAFT.getBlock("wired_modem_full"))) {
+				return state.getOptionalValue(BooleanProperty.create("peripheral")).orElse(false);
+			}
+		}
+
+		return false;
+	}
 
 }

src/main/java/com/simibubi/create/content/contraptions/relays/advanced/sequencer/ConfigureSequencedGearshiftPacket.java

@@ -35,6 +35,9 @@ public class ConfigureSequencedGearshiftPacket extends TileEntityConfigurationPa
 
 	@Override
 	protected void applySettings(SequencedGearshiftTileEntity te) {
+		if (te.isComputerControlled(te))
+			return;
+
 		te.run(-1);
 		te.instructions = Instruction.deserializeAll(instructions);
 		te.sendData();

src/main/java/com/simibubi/create/content/contraptions/relays/advanced/sequencer/SequencedGearshiftScreen.java

@@ -29,6 +29,7 @@ public class SequencedGearshiftScreen extends AbstractSimiScreen {
 	private ListTag compareTag;
 	private Vector<Instruction> instructions;
 	private BlockPos pos;
+	private final boolean isComputerControlled;
 
 	private Vector<Vector<ScrollInput>> inputs;
 
@@ -36,6 +37,7 @@ public class SequencedGearshiftScreen extends AbstractSimiScreen {
 		super(Lang.translateDirect("gui.sequenced_gearshift.title"));
 		this.instructions = te.instructions;
 		this.pos = te.getBlockPos();
+		this.isComputerControlled = te.isComputerControlled(te);
 		compareTag = Instruction.serializeAll(instructions);
 	}
 
@@ -49,11 +51,13 @@ public class SequencedGearshiftScreen extends AbstractSimiScreen {
 		int y = guiTop;
 
 		inputs = new Vector<>(5);
+		if (!isComputerControlled) {
 			for (int row = 0; row < inputs.capacity(); row++)
 				inputs.add(new Vector<>(3));
 
 			for (int row = 0; row < instructions.size(); row++)
 				initInputsOfRow(row, x, y);
+		}
 
 		confirmButton =
 			new IconButton(x + background.width - 33, y + background.height - 24, AllIcons.I_CONFIRM);
@@ -134,6 +138,15 @@ public class SequencedGearshiftScreen extends AbstractSimiScreen {
 
 		background.render(ms, x, y, this);
 
+		if (isComputerControlled) {
+			for (int row = 0; row < instructions.capacity(); row++) {
+				AllGuiTextures toDraw = AllGuiTextures.SEQUENCER_EMPTY;
+				int yOffset = toDraw.height * row;
+
+				toDraw.render(ms, x, y + 14 + yOffset, this);
+			}
+
+		} else {
 			for (int row = 0; row < instructions.capacity(); row++) {
 				AllGuiTextures toDraw = AllGuiTextures.SEQUENCER_EMPTY;
 				int yOffset = toDraw.height * row;
@@ -155,6 +168,7 @@ public class SequencedGearshiftScreen extends AbstractSimiScreen {
 				if (def.hasSpeedParameter)
 					label(ms, 127, yOffset - 3, instruction.speedModifier.label);
 			}
+		}
 
 		drawCenteredString(ms, font, title, x + (background.width - 8) / 2, y + 3, 0xFFFFFF);
 
@@ -169,6 +183,9 @@ public class SequencedGearshiftScreen extends AbstractSimiScreen {
 	}
 
 	public void sendPacket() {
+		if (isComputerControlled)
+			return;
+
 		ListTag serialized = Instruction.serializeAll(instructions);
 		if (serialized.equals(compareTag))
 			return;

src/main/java/com/simibubi/create/content/contraptions/relays/advanced/sequencer/SequencedGearshiftTileEntity.java

@@ -82,6 +82,8 @@ public class SequencedGearshiftTileEntity extends SplitShaftTileEntity implement
 	}
 
 	public void onRedstoneUpdate(boolean isPowered, boolean isRunning) {
+		if (isComputerControlled(this))
+			return;
 		if (!poweredPreviously && isPowered)
 			risingFlank();
 		poweredPreviously = isPowered;

src/main/java/com/simibubi/create/content/logistics/block/display/AllDisplayBehaviours.java

@@ -244,7 +244,6 @@ public class AllDisplayBehaviours {
 			DisplayBehaviour computerDisplaySource = register(Create.asResource("computer_display_source"), new ComputerDisplaySource());
 
 			assignTile(computerDisplaySource, new ResourceLocation(Mods.COMPUTERCRAFT.asId(), "wired_modem_full"));
-			assignTile(computerDisplaySource, new ResourceLocation("computercraft", "wired_modem"));
 		});
 	}
 }