fix middle click on access panel

res/content/base/scripts/hud.lua

@@ -6,13 +6,18 @@ function on_hud_open()
         base_util.drop_from_slot(invid, 0, mode)
     end)
 
+    events.on("core:access_panel_slot_middle_click", function(itemid)
+        local exc_invid = hud.get_exchange_inventory()
+        inventory.set(exc_invid, 0, itemid, item.stack_size(itemid))
+    end)
+
     events.on("core:slot_middle_click", function(invid, slot)
         if not player.is_infinite_items(hud.get_player()) then
             return
         end
-        local itemid = inventory.get(invid, slot)
         local exc_invid = hud.get_exchange_inventory()
         local exc_itemid = inventory.get(exc_invid, 0)
+        local itemid = inventory.get(invid, slot)
         if itemid == 0 then
             if exc_itemid ~= 0 then
               local stack_size = item.stack_size(exc_itemid)
@@ -22,6 +27,11 @@ function on_hud_open()
             if exc_itemid == 0 then
               local stack_size = item.stack_size(itemid)
               inventory.set(exc_invid, 0, itemid, stack_size)
+            else
+                if exc_itemid == itemid then
+                    local stack_size = item.stack_size(exc_itemid)
+                    inventory.set(invid, slot, exc_itemid, stack_size)
+                end
             end
         end
     end)

src/graphics/ui/elements/InventoryView.cpp

@@ -1,6 +1,7 @@
 #include "InventoryView.hpp"
 
 #include <glm/glm.hpp>
+#include <iostream>
 #include <utility>
 
 #include "assets/Assets.hpp"
@@ -501,10 +502,14 @@ void SlotView::performRightClick(ItemStack& stack, ItemStack& grabbed) {
 }
 
 void SlotView::performMiddleClick(ItemStack& stack, ItemStack& grabbed) {
-    scripting::on_slot_middle_click(
+    if (layout.itemSource) {
-        inventoryId,
+        scripting::on_access_panel_slot_middle_click(stack.getItemId());
-        layout.index
+    } else {
-    );
+        scripting::on_slot_middle_click(
+            inventoryId,
+            layout.index
+        );
+    }
 }
 
 void SlotView::clicked(Mousecode button) {

src/logic/scripting/scripting.hpp

@@ -111,6 +111,7 @@ namespace scripting {
     void on_inventory_interact(int invid, int slot, int action, int mode);
 
     void on_slot_middle_click(int invid, int slot);
+    void on_access_panel_slot_middle_click(const itemid_t itemid);
 
     void on_player_tick(Player* player, int tps);
 

src/logic/scripting/scripting_hud.cpp

@@ -12,6 +12,7 @@
 #include "lua/libs/api_lua.hpp"
 #include "lua/lua_engine.hpp"
 #include "scripting.hpp"
+#include "typedefs.hpp"
 
 using namespace scripting;
 
@@ -123,6 +124,18 @@ void scripting::on_slot_middle_click(int invid, int slot) {
     );
 }
 
+void scripting::on_access_panel_slot_middle_click(const itemid_t itemid) {
+    auto L = lua::get_main_state();
+    lua::emit_event(
+        L,
+        "core:access_panel_slot_middle_click",
+        [&](lua::State* L) {
+            lua::pushinteger(L, itemid);
+            return 1;
+        }
+    );
+}
+
 void scripting::load_hud_script(
     const scriptenv& senv,
     const std::string& packid,