mirror of
https://github.com/vrld/hump.git
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95 lines
2.8 KiB
Lua
95 lines
2.8 KiB
Lua
--[[
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Copyright (c) 2010-2013 Matthias Richter
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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Except as contained in this notice, the name(s) of the above copyright holders
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shall not be used in advertising or otherwise to promote the sale, use or
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other dealings in this Software without prior written authorization.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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]]--
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local Timer = {}
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Timer.__index = Timer
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local function _nothing_() end
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local function new()
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return setmetatable({functions = {}}, Timer)
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end
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function Timer:update(dt)
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local to_remove = {}
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for handle, delay in pairs(self.functions) do
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delay = delay - dt
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if delay <= 0 then
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to_remove[#to_remove+1] = handle
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end
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self.functions[handle] = delay
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handle.func(dt, delay)
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end
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for _,handle in ipairs(to_remove) do
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self.functions[handle] = nil
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handle.after(handle.after)
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end
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end
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function Timer:do_for(delay, func, after)
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local handle = {func = func, after = after}
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self.functions[handle] = delay
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return handle
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end
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function Timer:add(delay, func)
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return self:do_for(delay, _nothing_, func)
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end
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function Timer:addPeriodic(delay, func, count)
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local count = count or math.huge -- exploit below: math.huge - 1 = math.huge
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return self:add(delay, function(f)
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if func(func) == false then return end
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count = count - 1
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if count > 0 then
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self:add(delay, f)
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end
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end)
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end
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function Timer:cancel(handle)
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self.functions[handle] = nil
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end
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function Timer:clear()
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self.functions = {}
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end
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-- default timer
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local default = new()
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-- the module
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return setmetatable({
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new = new,
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update = function(...) return default:update(...) end,
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do_for = function(...) return default:do_for(...) end,
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add = function(...) return default:add(...) end,
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addPeriodic = function(...) return default:addPeriodic(...) end,
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cancel = function(...) return default:cancel(...) end,
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clear = function(...) return default:clear(...) end,
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}, {__call = new})
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