Fix problems when overriding the hand:

- If the hand can dig a node the item wielded can't, allow to dig it anyway.
- Fix the API callbacks from setting the hand instead of the wielded item.

src/content_sao.cpp

@@ -1271,6 +1271,16 @@ std::string PlayerSAO::getWieldList() const
 }
 
 ItemStack PlayerSAO::getWieldedItem() const
+{
+	const Inventory *inv = getInventory();
+	ItemStack ret;
+	const InventoryList *mlist = inv->getList(getWieldList());
+	if (mlist && getWieldIndex() < (s32)mlist->getSize())
+		ret = mlist->getItem(getWieldIndex());
+	return ret;
+}
+
+ItemStack PlayerSAO::getWieldedItemOrHand() const
 {
 	const Inventory *inv = getInventory();
 	ItemStack ret;
@@ -1291,14 +1301,6 @@ bool PlayerSAO::setWieldedItem(const ItemStack &item)
 	if (inv) {
 		InventoryList *mlist = inv->getList(getWieldList());
 		if (mlist) {
-			ItemStack olditem = mlist->getItem(getWieldIndex());
-			if (olditem.name.empty()) {
-				InventoryList *hlist = inv->getList("hand");
-				if (hlist) {
-					hlist->changeItem(0, item);
-					return true;
-				}
-			}
 			mlist->changeItem(getWieldIndex(), item);
 			return true;
 		}

src/content_sao.h

@@ -254,6 +254,7 @@ class PlayerSAO : public UnitSAO
 	InventoryLocation getInventoryLocation() const;
 	std::string getWieldList() const;
 	ItemStack getWieldedItem() const;
+	ItemStack getWieldedItemOrHand() const;
 	bool setWieldedItem(const ItemStack &item);
 	int getWieldIndex() const;
 	void setWieldIndex(int i);

src/game.cpp

@@ -3402,13 +3402,11 @@ void Game::processPlayerInteraction(f32 dtime, bool show_hud, bool show_debug)
 			playeritem = mlist->getItem(client->getPlayerItem());
 	}
 
-	if (playeritem.getDefinition(itemdef_manager).name.empty()) { // override the hand
-		InventoryList *hlist = local_inventory->getList("hand");
-		if (hlist)
-			playeritem = hlist->getItem(0);
-	}
 	const ItemDefinition &playeritem_def =
 			playeritem.getDefinition(itemdef_manager);
+	InventoryList *hlist = local_inventory->getList("hand");
+	const ItemDefinition &hand_def =
+		hlist?hlist->getItem(0).getDefinition(itemdef_manager):itemdef_manager->get("");
 
 	v3f player_position  = player->getPosition();
 	v3f camera_position  = camera->getPosition();
@@ -3421,7 +3419,7 @@ void Game::processPlayerInteraction(f32 dtime, bool show_hud, bool show_debug)
 	*/
 
 	f32 d = playeritem_def.range; // max. distance
-	f32 d_hand = itemdef_manager->get("").range;
+	f32 d_hand = hand_def.range;
 
 	if (d < 0 && d_hand >= 0)
 		d = d_hand;
@@ -3509,6 +3507,9 @@ void Game::processPlayerInteraction(f32 dtime, bool show_hud, bool show_debug)
 	} else if (pointed.type == POINTEDTHING_NODE) {
 		ToolCapabilities playeritem_toolcap =
 				playeritem.getToolCapabilities(itemdef_manager);
+		if (playeritem.name.empty()) {
+			playeritem_toolcap = *hand_def.tool_capabilities;
+		}
 		handlePointingAtNode(pointed, playeritem_def, playeritem_toolcap, dtime);
 	} else if (pointed.type == POINTEDTHING_OBJECT) {
 		handlePointingAtObject(pointed, playeritem, player_position, show_debug);
@@ -3768,9 +3769,16 @@ void Game::handlePointingAtObject(const PointedThing &pointed, const ItemStack &
 			// Report direct punch
 			v3f objpos = runData.selected_object->getPosition();
 			v3f dir = (objpos - player_position).normalize();
+			ItemStack item = playeritem;
+			if (playeritem.name.empty()) {
+				InventoryList *hlist = local_inventory->getList("hand");
+				if (hlist) {
+					item = hlist->getItem(0);
+				}
+			}
 
 			bool disable_send = runData.selected_object->directReportPunch(
-					dir, &playeritem, runData.time_from_last_punch);
+					dir, &item, runData.time_from_last_punch);
 			runData.time_from_last_punch = 0;
 
 			if (!disable_send)
@@ -3807,7 +3815,9 @@ void Game::handleDigging(const PointedThing &pointed, const v3s16 &nodepos,
 
 	// If can't dig, try hand
 	if (!params.diggable) {
-		const ItemDefinition &hand = itemdef_manager->get("");
+		InventoryList *hlist = local_inventory->getList("hand");
+		const ItemDefinition &hand =
+			hlist?hlist->getItem(0).getDefinition(itemdef_manager):itemdef_manager->get("");
 		const ToolCapabilities *tp = hand.tool_capabilities;
 
 		if (tp)

src/network/serverpackethandler.cpp

@@ -1382,7 +1382,10 @@ void Server::handleCommand_Interact(NetworkPacket* pkt)
 		const ItemDefinition &playeritem_def =
 			playersao->getWieldedItem().getDefinition(m_itemdef);
 		float max_d = BS * playeritem_def.range;
-		float max_d_hand = BS * m_itemdef->get("").range;
+		InventoryList *hlist = playersao->getInventory()->getList("hand");
+		const ItemDefinition &hand_def =
+			hlist?(hlist->getItem(0).getDefinition(m_itemdef)):(m_itemdef->get(""));
+		float max_d_hand = BS * hand_def.range;
 		if (max_d < 0 && max_d_hand >= 0)
 			max_d = max_d_hand;
 		else if (max_d < 0)
@@ -1443,7 +1446,7 @@ void Server::handleCommand_Interact(NetworkPacket* pkt)
 					<<pointed.object_id<<": "
 					<<pointed_object->getDescription()<<std::endl;
 
-			ItemStack punchitem = playersao->getWieldedItem();
+			ItemStack punchitem = playersao->getWieldedItemOrHand();
 			ToolCapabilities toolcap =
 					punchitem.getToolCapabilities(m_itemdef);
 			v3f dir = (pointed_object->getBasePosition() -
@@ -1510,15 +1513,17 @@ void Server::handleCommand_Interact(NetworkPacket* pkt)
 					m_script->on_cheat(playersao, "finished_unknown_dig");
 				}
 				// Get player's wielded item
-				ItemStack playeritem = playersao->getWieldedItem();
+				ItemStack playeritem = playersao->getWieldedItemOrHand();
 				ToolCapabilities playeritem_toolcap =
 						playeritem.getToolCapabilities(m_itemdef);
 				// Get diggability and expected digging time
 				DigParams params = getDigParams(m_nodedef->get(n).groups,
 						&playeritem_toolcap);
 				// If can't dig, try hand
 				if (!params.diggable) {
-					const ItemDefinition &hand = m_itemdef->get("");
+					InventoryList *hlist = playersao->getInventory()->getList("hand");
+					const ItemDefinition &hand =
+						hlist?hlist->getItem(0).getDefinition(m_itemdef):m_itemdef->get("");
 					const ToolCapabilities *tp = hand.tool_capabilities;
 					if (tp)
 						params = getDigParams(m_nodedef->get(n).groups, tp);