From 3f271564e08716cfeb4a966f4291524b0fac05d3 Mon Sep 17 00:00:00 2001
From: sfan5 <sfan5@live.de>
Date: Sat, 9 Nov 2019 00:41:33 +0100
Subject: [PATCH] Run on_item_use CSM callback even if item is not marked
 usable

Mods may want to to handle item interaction even if the item
is not marked usable (= server-side callback exists).
---
 clientmods/preview/init.lua | 4 ++++
 src/client/game.cpp         | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/clientmods/preview/init.lua b/clientmods/preview/init.lua
index 96deae074..dd856217f 100644
--- a/clientmods/preview/init.lua
+++ b/clientmods/preview/init.lua
@@ -66,6 +66,10 @@ core.register_on_item_use(function(itemstack, pointed_thing)
 	print("pointed_thing :" .. dump(pointed_thing))
 	print("item = " .. itemstack:get_name())
 
+	if not itemstack:is_empty() then
+		return false
+	end
+
 	local pos = vector.add(core.localplayer:get_pos(), core.camera:get_offset())
 	local pos2 = vector.add(pos, vector.multiply(core.camera:get_look_dir(), 100))
 
diff --git a/src/client/game.cpp b/src/client/game.cpp
index 450eb4e32..59654e892 100644
--- a/src/client/game.cpp
+++ b/src/client/game.cpp
@@ -3061,6 +3061,9 @@ void Game::processPlayerInteraction(f32 dtime, bool show_hud, bool show_debug)
 	} else if (input->getLeftState()) {
 		// When button is held down in air, show continuous animation
 		runData.left_punch = true;
+		// Run callback even though item is not usable
+		if (input->getLeftClicked() && client->modsLoaded())
+			client->getScript()->on_item_use(selected_item, pointed);
 	} else if (input->getRightClicked()) {
 		handlePointingAtNothing(selected_item);
 	}