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Fix inventory swapping not calling all callbacks (#9923)

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"Predicts" whether something will be swapped for allow callbacks, then calls callbacks a second time with swapped properties.

Co-authored-by: SmallJoker <SmallJoker@users.noreply.github.com>
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Lars Müller 2020-09-04 20:49:07 +02:00 • committed by GitHub
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25
doc/lua_api.txt
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@ -5888,6 +5888,31 @@ An `InvRef` is a reference to an inventory.
`minetest.get_inventory(location)`.
* returns `{type="undefined"}` in case location is not known
### Callbacks
Detached & nodemeta inventories provide the following callbacks for move actions:
#### Before
The `allow_*` callbacks return how many items can be moved.
* `allow_move`/`allow_metadata_inventory_move`: Moving items in the inventory
* `allow_take`/`allow_metadata_inventory_take`: Taking items from the inventory
* `allow_put`/`allow_metadata_inventory_put`: Putting items to the inventory
#### After
The `on_*` callbacks are called after the items have been placed in the inventories.
* `on_move`/`on_metadata_inventory_move`: Moving items in the inventory
* `on_take`/`on_metadata_inventory_take`: Taking items from the inventory
* `on_put`/`on_metadata_inventory_put`: Putting items to the inventory
#### Swapping
When a player tries to put an item to a place where another item is, the items are *swapped*.
This means that all callbacks will be called twice (once for each action).
`ItemStack`
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