52 lines
977 B
Lua
52 lines
977 B
Lua
--[[ Events library
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-- (c) Er2 2021 <er2@dismail.de>
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-- Zlib License
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--]]
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local events = {}
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events.__index = events
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function events:_add(t, n, f)
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table.insert(self._ev_, {
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type = t,
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name = n,
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fn = f,
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})
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end
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function events:on(n,f) self:_add('on', n,f) end
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function events:once(n,f) self:_add('once', n,f) end
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function events:off(f)
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for k, v in pairs(self._ev_) do
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if v.fn == f then
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table.remove(self._ev_, k)
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end
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end
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end
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function events:_ev(t, i, name, ...)
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local v = t[i]
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if v.name == name then
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v.fn(...)
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if v.type == 'once' then table.remove(t, i) end
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end
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end
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function events:emit(name, ...)
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local t = self._ev_
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for i = 1, #t do
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local v = t[i] or {}
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if type(v) == 'table'
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and type(v.name) == 'string'
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and type(v.type) == 'string'
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and type(v.fn) == 'function'
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then self:_ev(t, i, name, ...) end
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end
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end
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return function(t)
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t._ev_ = {}
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return setmetatable(t, events)
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end
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