From 1e5b9fc94b9e5b1c2bfbd14a23353e5aea5b85bd Mon Sep 17 00:00:00 2001
From: ReinforceZwei <shingleogchu@gmail.com>
Date: Sat, 23 May 2020 09:20:48 +0800
Subject: [PATCH] Implement middle click

---
 MinecraftClient/Commands/Inventory.cs           | 13 +++++++++++--
 MinecraftClient/Protocol/Handlers/Protocol18.cs |  7 +++++--
 MinecraftClient/Protocol/IMinecraftCom.cs       |  2 +-
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/MinecraftClient/Commands/Inventory.cs b/MinecraftClient/Commands/Inventory.cs
index 0c9b1452..057c3225 100644
--- a/MinecraftClient/Commands/Inventory.cs
+++ b/MinecraftClient/Commands/Inventory.cs
@@ -9,7 +9,7 @@ namespace MinecraftClient.Commands
     class Inventory : Command
     {
         public override string CMDName { get { return "inventory"; } }
-        public override string CMDDesc { get { return "inventory <<id>|player|container> <list|close|click <slot> <L|R>>: Interact with inventories"; } }
+        public override string CMDDesc { get { return "inventory <<id>|player|container> <list|close|click <slot> <L|R|M>>: Interact with inventories"; } }
 
         public override string Run(McTcpClient handler, string command, Dictionary<string, object> localVars)
         {
@@ -64,14 +64,23 @@ namespace MinecraftClient.Commands
                                 {
                                     int slot = int.Parse(args[2]);
                                     byte buttom = 0;
+                                    string keyName = "Left";
                                     if (args.Length == 4)
                                     {
                                         string b = args[3];
                                         if (b.ToLower() == "r")
+                                        {
                                             buttom = 1;
+                                            keyName = "Right";
+                                        }
+                                        if (b.ToLower() == "m")
+                                        {
+                                            buttom = 2;
+                                            keyName = "Middle";
+                                        }
                                     }
                                     handler.ClickWindowSlot(inventoryId, slot, buttom);
-                                    return buttom + " Clicking slot " + slot + " in window #" + inventoryId;
+                                    return keyName + " clicking slot " + slot + " in window #" + inventoryId;
                                 }
                                 else return CMDDesc;
                             default:
diff --git a/MinecraftClient/Protocol/Handlers/Protocol18.cs b/MinecraftClient/Protocol/Handlers/Protocol18.cs
index c3a69cf2..1ee17ec9 100644
--- a/MinecraftClient/Protocol/Handlers/Protocol18.cs
+++ b/MinecraftClient/Protocol/Handlers/Protocol18.cs
@@ -1362,9 +1362,12 @@ namespace MinecraftClient.Protocol.Handlers
                 packet.AddRange(dataTypes.GetShort(actionNumber));
 
                 // Operation mode = 0 (default)
+                byte mode = 0;
+                if (buttom == 2) // middle-click mode is 3
+                    mode = 3;
                 if (protocolversion >= MC19Version)
-                    packet.AddRange(dataTypes.GetVarInt(0));
-                else packet.Add(0);
+                    packet.AddRange(dataTypes.GetVarInt(mode));
+                else packet.Add(mode);
 
                 packet.AddRange(dataTypes.GetItemSlot(item));
 
diff --git a/MinecraftClient/Protocol/IMinecraftCom.cs b/MinecraftClient/Protocol/IMinecraftCom.cs
index c8134de1..8db23c69 100644
--- a/MinecraftClient/Protocol/IMinecraftCom.cs
+++ b/MinecraftClient/Protocol/IMinecraftCom.cs
@@ -144,7 +144,7 @@ namespace MinecraftClient.Protocol
         /// </summary>
         /// <param name="windowId">Id of the window being clicked</param>
         /// <param name="slotId">Id of the clicked slot</param>
-        /// <param name="buttom">0 for left click, 1 for right click</param>
+        /// <param name="buttom">0 for left click, 1 for right click, 2 for middle click</param>
         /// <param name="item">Item in the clicked slot</param>
         /// <returns>True if packet was successfully sent</returns>
         bool SendClickWindow(int windowId, int slotId, byte buttom, Item item);