86 lines
3.4 KiB
Lua
86 lines
3.4 KiB
Lua
--[[
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Copyright (c) 2015, Robert 'Bobby' Zenz
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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--]]
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--- Provides various extensions to the builtin functions.
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minetestex = {
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node_drops_handlers = List:new(),
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original_node_drops_function = nil
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}
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--- The handler that is used for invoking the registered node drop functions.
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--
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-- @param position The position at which the drop occurred.
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-- @param drops The drops that are being dropped, a list of ItemStacks.
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-- @param player The player which the event originated at.
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function minetestex.handle_node_drops(position, drops, player)
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local dropped_items = List:new()
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for index, drop in ipairs(drops) do
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dropped_items:add(ItemStack(drop))
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end
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local handled = false
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minetestex.node_drops_handlers:foreach(function(handler, index)
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handled = (handler(position, dropped_items, player, handled) == true)
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end)
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if not handled then
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minetestex.original_node_drops_function(position, drops, player)
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end
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end
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--- Initializes the node drops system. This is an internal function and should
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-- not be called from clients.
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function minetestex.init()
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minetestex.original_node_drops_function = minetest.handle_node_drops
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minetest.handle_node_drops = minetestex.handle_node_drops
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end
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--- Registers the given handler for node drops.
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--
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-- @param handler The handler function. The function is assumed to take four
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-- parameters, the position at which the drops occurred,
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-- the drops which are dropped as list if ItemStacks, the player
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-- with which the even originated and if the event has been
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-- handled so far or not. Can return a boolean if the event
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-- has been handled. The handled flag is used to indicate
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-- wether the builtin functionality should be invoked or not.
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-- That means that if the last handler returns true, the items
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-- will not be added to the players inventory by default. By
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-- default the handler should return the given handled parameter
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-- to not change the state or return the desired state.
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function minetestex.register_on_nodedrops(handler)
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minetestex.node_drops_handlers:add(handler)
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end
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-- Initialize everything.
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minetestex.init()
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