From ccb861002095419e12e891fe00ea97c44b9cddc7 Mon Sep 17 00:00:00 2001
From: BruceChen <MrChen131217@gmail.com>
Date: Mon, 12 Sep 2022 02:19:20 +0800
Subject: [PATCH] Support use left hand

---
 MinecraftClient/ChatBots/AutoFishing.cs              | 5 ++++-
 MinecraftClient/McClient.cs                          | 9 +++++++++
 MinecraftClient/Resources/config/MinecraftClient.ini | 1 +
 MinecraftClient/Scripting/ChatBot.cs                 | 9 +++++++++
 MinecraftClient/Settings.cs                          | 1 +
 5 files changed, 24 insertions(+), 1 deletion(-)

diff --git a/MinecraftClient/ChatBots/AutoFishing.cs b/MinecraftClient/ChatBots/AutoFishing.cs
index 507a736d..d92d07ab 100644
--- a/MinecraftClient/ChatBots/AutoFishing.cs
+++ b/MinecraftClient/ChatBots/AutoFishing.cs
@@ -188,7 +188,10 @@ namespace MinecraftClient.ChatBots
 
         private void UseFishRod()
         {
-            UseItemInHand();
+            if (Settings.AutoFishing_Mainhand)
+                UseItemInHand();
+            else
+                UseItemInLeftHand();
         }
 
         /// <summary>
diff --git a/MinecraftClient/McClient.cs b/MinecraftClient/McClient.cs
index 3ef7fbf1..8ba106fa 100644
--- a/MinecraftClient/McClient.cs
+++ b/MinecraftClient/McClient.cs
@@ -1277,6 +1277,15 @@ namespace MinecraftClient
             return InvokeOnMainThread(() => handler.SendUseItem(0, this.sequenceId));
         }
 
+        /// <summary>
+        /// Use the item currently in the player's left hand
+        /// </summary>
+        /// <returns>TRUE if the item was successfully used</returns>
+        public bool UseItemOnLeftHand()
+        {
+            return InvokeOnMainThread(() => handler.SendUseItem(1, this.sequenceId));
+        }
+
         /// <summary>
         /// Try to merge a slot
         /// </summary>
diff --git a/MinecraftClient/Resources/config/MinecraftClient.ini b/MinecraftClient/Resources/config/MinecraftClient.ini
index bc43d351..2a9d7436 100644
--- a/MinecraftClient/Resources/config/MinecraftClient.ini
+++ b/MinecraftClient/Resources/config/MinecraftClient.ini
@@ -207,6 +207,7 @@ interaction=Attack                 # Possible values: Interact, Attack (default)
 # /!\ Make sure server rules allow automated farming before using this bot
 enabled=false
 antidespawn=false
+main_hand=true                     # Use the main hand or the second hand to hold the rod
 fishing_delay=3.0                  # How long after entering the game to start fishing (seconds).
 fishing_timeout=600.0              # Fishing timeout (seconds). Timeout will re-cast the rod
 fishing_hook_threshold=0.2         # Fish hooks moving on the Y-axis above this threshold will be considered to have caught a fish.
diff --git a/MinecraftClient/Scripting/ChatBot.cs b/MinecraftClient/Scripting/ChatBot.cs
index 2fccd721..3e5515e9 100644
--- a/MinecraftClient/Scripting/ChatBot.cs
+++ b/MinecraftClient/Scripting/ChatBot.cs
@@ -1262,6 +1262,15 @@ namespace MinecraftClient
             return Handler.UseItemOnHand();
         }
 
+        /// <summary>
+        /// Use item currently in the player's hand (active inventory bar slot)
+        /// </summary>
+        /// <returns>TRUE if successful</returns>
+        protected bool UseItemInLeftHand()
+        {
+            return Handler.UseItemOnLeftHand();
+        }
+
         /// <summary>
         /// Check inventory handling enable status
         /// </summary>
diff --git a/MinecraftClient/Settings.cs b/MinecraftClient/Settings.cs
index 7f8c71b2..380f7154 100644
--- a/MinecraftClient/Settings.cs
+++ b/MinecraftClient/Settings.cs
@@ -203,6 +203,7 @@ namespace MinecraftClient
         //Auto Fishing
         public static bool AutoFishing_Enabled = false;
         public static bool AutoFishing_Antidespawn = false;
+        public static bool AutoFishing_Mainhand = true;
         public static double AutoFishing_FishingDelay = 3.0;
         public static double AutoFishing_FishingTimeout = 600.0;
         public static double AutoFishing_FishingHookThreshold = 0.2;