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https://github.com/sbrl/Minetest-WorldEditAdditions.git
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Port EventEmitter from Node.js
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worldeditadditions_core/core/lib/EventEmitter.lua
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50
worldeditadditions_core/core/lib/EventEmitter.lua
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@ -0,0 +1,50 @@
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--- A 3-dimensional vector.
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-- @class
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local EventEmitter = {}
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EventEmitter.__index = EventEmitter
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EventEmitter.__name = "EventEmitter" -- A hack to allow identification in wea.inspect
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function EventEmitter.new()
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local result = {
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events = {}
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}
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setmetatable(result, EventEmitter)
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return result
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end
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function EventEmitter.addEventListener(this, event_name, func)
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if this.events[event_name] == nil then this.events[event_name] = {} end
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table.insert(this.events[event_name], func)
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end
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function EventEmitter.on(this, event_name, func)
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return EventEmitter.addEventListener(this, event_name, func)
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end
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function EventEmitter.removeEventListener(this, event_name, func)
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if this.events[event_name] == nil then return false end
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for index, next_func in ipairs(this.events[event_name]) do
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if next_func == func then
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table.remove(this.events[event_name], index)
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break
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end
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end
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end
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function EventEmitter.off(this, event_name, func)
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return EventEmitter.removeEventListener(this, event_name, func)
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end
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function EventEmitter.emit(this, event_name, args)
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if this.events[event_name] == nil then return end
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for index,next_func in ipairs(this.events[event_name]) do
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next_func(args) -- TODO: Move unpack compat to wea_c
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end
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-- TODO: Monitor execution time, log if it's slow? We'll need to move WEA utils over to wea_c first though...
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end
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function EventEmitter.clear(this, event_name)
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this.events[event_name] = nil
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end
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return EventEmitter
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@ -27,7 +27,7 @@ wea_c.register_command = dofile(modpath.."/core/register_command.lua")
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wea_c.fetch_command_def = dofile(modpath.."/core/fetch_command_def.lua")
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wea_c.register_alias = dofile(modpath.."/core/register_alias.lua")
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wea_c.pos = dofile(modpath.."/core/pos.lua")
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wea_c.EventEmitter = dofile(modpath.."/core/lib/EventEmitter.lua")
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print("WEA_C pos", wea_c.pos.push)
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-- Initialise WorldEdit stuff if the WorldEdit mod is not present
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