Render travel anchor when holding staff in offhand (#226)

dependencies.gradle

@@ -12,6 +12,7 @@ dependencies {
 
     devOnlyNonPublishable('com.github.GTNewHorizons:waila:1.19.22:dev') {transitive = false}
     runtimeOnlyNonPublishable('com.github.GTNewHorizons:WAILAPlugins:0.7.2:dev') {transitive = false}
+    compileOnly("com.github.GTNewHorizons:Backhand:1.8.4:dev") { transitive = false }
     compileOnly('com.github.GTNewHorizons:Applied-Energistics-2-Unofficial:rv3-beta-812-GTNH:api') {transitive = false}
     compileOnly('com.github.GTNewHorizons:Baubles-Expanded:2.2.6-GTNH:dev') {transitive = false}
     compileOnly('com.github.GTNewHorizons:GT5-Unofficial:5.09.52.261:dev') {transitive = false}

src/main/java/crazypants/enderio/teleport/TravelController.java

@@ -15,6 +15,7 @@ import net.minecraft.entity.Entity;
 import net.minecraft.entity.player.EntityPlayer;
 import net.minecraft.entity.player.EntityPlayerMP;
 import net.minecraft.inventory.IInventory;
+import net.minecraft.item.Item;
 import net.minecraft.item.ItemStack;
 import net.minecraft.tileentity.TileEntity;
 import net.minecraft.util.AxisAlignedBB;
@@ -66,7 +67,9 @@ import crazypants.enderio.teleport.packet.PacketDrainStaff;
 import crazypants.enderio.teleport.packet.PacketLongDistanceTravelEvent;
 import crazypants.enderio.teleport.packet.PacketOpenAuthGui;
 import crazypants.enderio.teleport.packet.PacketTravelEvent;
+import crazypants.util.BackhandUtil;
 import crazypants.util.BaublesUtil;
+import xonin.backhand.api.core.BackhandUtils;
 
 public class TravelController {
 
@@ -538,6 +541,21 @@ public class TravelController {
         return action < 2;
     }
 
+    @Nullable
+    private TravelSource getTravelSource(final EntityPlayer ep, final ItemStack stack) {
+        final Item item = stack.getItem();
+        if (item instanceof ItemTeleportStaff) {
+            if (((ItemTeleportStaff) item).isActive(ep, stack)) {
+                return TravelSource.TELEPORT_STAFF;
+            }
+        } else if (item instanceof IItemOfTravel) {
+            if (((IItemOfTravel) item).isActive(ep, stack)) {
+                return TravelSource.STAFF;
+            }
+        }
+        return null;
+    }
+
     /** Returns null if no travel item is in inventory/baubles. */
     @Nullable
     public TravelSource getTravelItemTravelSource(EntityPlayer ep, boolean checkInventoryAndBaubles) {
@@ -545,6 +563,16 @@ public class TravelController {
             return null;
         }
 
+        if (BackhandUtil.backhandLoaded) {
+            final ItemStack offhand = BackhandUtils.getOffhandItem(ep);
+            if (offhand != null && offhand.getItem() != null) {
+                final TravelSource source = getTravelSource(ep, offhand);
+                if (source != null) {
+                    return source;
+                }
+            }
+        }
+
         ItemStack equipped = ep.getCurrentEquippedItem();
         if (checkInventoryAndBaubles) {
             if (equipped == null || !(equipped.getItem() instanceof IItemOfTravel)
@@ -552,16 +580,9 @@ public class TravelController {
                 equipped = findTravelItemInInventoryOrBaubles(ep);
             }
         }
+
         if (equipped != null) {
-            if (equipped.getItem() instanceof ItemTeleportStaff) {
-                if (((ItemTeleportStaff) equipped.getItem()).isActive(ep, equipped)) {
-                    return TravelSource.TELEPORT_STAFF;
-                }
-            } else if (equipped.getItem() instanceof IItemOfTravel) {
-                if (((IItemOfTravel) equipped.getItem()).isActive(ep, equipped)) {
-                    return TravelSource.STAFF;
-                }
-            }
+            return getTravelSource(ep, equipped);
         }
 
         return null;
@@ -634,6 +655,7 @@ public class TravelController {
                 }
             }
         }
+
         return travelItemSlot;
     }
 

src/main/java/crazypants/util/BackhandUtil.java

@@ -0,0 +1,9 @@
+package crazypants.util;
+
+import cpw.mods.fml.common.Loader;
+
+public class BackhandUtil {
+
+    public final static boolean backhandLoaded = Loader.isModLoaded("backhand");
+
+}