RGON: Added EID descriptions on Main menu collection page

eid_repentogon.lua

@@ -24,6 +24,7 @@ function EID:GetEntityXMLName(Type, Variant, SubType)
 	return xmlEntry and xmlEntry.name or EID.XMLEntityNames[Type .. "." .. Variant] or
 		EID.XMLEntityNames[Type .. "." .. Variant .. "." .. SubType]
 end
+
 -- takes a string like "5.100.69"
 function EID:GetEntityXMLNameByString(str)
 	local sep = {}
@@ -36,3 +37,47 @@ end
 -- Render EID above hud, if REPENTOGON is installed
 EID:RemoveCallback(ModCallbacks.MC_POST_RENDER, EID.OnRender)
 EID:AddCallback(ModCallbacks.MC_HUD_RENDER, EID.OnRender)
+
+
+-- render descriptions for items on the collection page
+
+local oldPosInitFunc = EID.PositionLocalMode
+function EID:PositionLocalMode(entity)
+	oldPosInitFunc(entity)
+	-- custom description position when describing collectionpage entries
+	if MenuManager:GetActiveMenu() == MainMenuType.COLLECTION then
+		EID.CurrentScaleType = "MainMenu"
+		EID.UsedPosition = Vector(10, 10)
+	end
+end
+
+local skipItemIDs = {}
+function EID:OnMenuRender()
+	if MenuManager:GetActiveMenu() == MainMenuType.COLLECTION then
+		if #skipItemIDs == 0 then -- build list of items not listed in the collectionpage
+			local itemConfig = Isaac.GetItemConfig()
+			for i = 1, EID:GetMaxCollectibleID(), 1 do
+				if itemConfig:GetCollectible(i) == nil or itemConfig:GetCollectible(i).Hidden then
+					table.insert(skipItemIDs, i)
+				end
+			end
+		end
+
+		local selectedPage = CollectionMenu.GetSelectedPage()
+		local CollectibleId = selectedPage * (20 * 6) + CollectionMenu.GetSelectedElement() + 1
+		for _, id in ipairs(skipItemIDs) do -- some items dont exist, so we need to "skip" those when counting
+			if id < CollectibleId then
+				CollectibleId = CollectibleId + 1
+			end
+		end
+		local demoDescObj = EID:getDescriptionObj(5, 100, CollectibleId)
+		if not Isaac.GetPersistentGameData():IsItemInCollection(CollectibleId) then
+			EID:renderQuestionMark(nil)
+			return
+		end
+
+		EID:printDescription(demoDescObj, nil)
+	end
+end
+
+EID:AddCallback(ModCallbacks.MC_MAIN_MENU_RENDER, EID.OnMenuRender)