Asa@0: --- **AceTimer-3.0** provides a central facility for registering timers.
Asa@0: -- AceTimer supports one-shot timers and repeating timers. All timers are stored in an efficient
Asa@0: -- data structure that allows easy dispatching and fast rescheduling. Timers can be registered, rescheduled
Asa@0: -- or canceled at any time, even from within a running timer, without conflict or large overhead.\\
Asa@0: -- AceTimer is currently limited to firing timers at a frequency of 0.1s. This constant may change
Asa@0: -- in the future, but for now it seemed like a good compromise in efficiency and accuracy.
Asa@0: --
Asa@0: -- All `:Schedule` functions will return a handle to the current timer, which you will need to store if you
Asa@0: -- need to cancel or reschedule the timer you just registered.
Asa@0: --
Asa@0: -- **AceTimer-3.0** can be embeded into your addon, either explicitly by calling AceTimer:Embed(MyAddon) or by 
Asa@0: -- specifying it as an embeded library in your AceAddon. All functions will be available on your addon object
Asa@0: -- and can be accessed directly, without having to explicitly call AceTimer itself.\\
Asa@0: -- It is recommended to embed AceTimer, otherwise you'll have to specify a custom `self` on all calls you
Asa@0: -- make into AceTimer.
Asa@0: -- @class file
Asa@0: -- @name AceTimer-3.0
Asa@0: -- @release $Id: AceTimer-3.0.lua 895 2009-12-06 16:28:55Z nevcairiel $
Asa@0: 
Asa@0: --[[
Asa@0: 	Basic assumptions:
Asa@0: 	* In a typical system, we do more re-scheduling per second than there are timer pulses per second
Asa@0: 	* Regardless of timer implementation, we cannot guarantee timely delivery due to FPS restriction (may be as low as 10)
Asa@0: 
Asa@0: 	This implementation:
Asa@0: 		CON: The smallest timer interval is constrained by HZ (currently 1/10s).
Asa@0: 		PRO: It will still correctly fire any timer slower than HZ over a length of time, e.g. 0.11s interval -> 90 times over 10 seconds
Asa@0: 		PRO: In lag bursts, the system simly skips missed timer intervals to decrease load
Asa@0: 		CON: Algorithms depending on a timer firing "N times per minute" will fail
Asa@0: 		PRO: (Re-)scheduling is O(1) with a VERY small constant. It's a simple linked list insertion in a hash bucket.
Asa@0: 		CAUTION: The BUCKETS constant constrains how many timers can be efficiently handled. With too many hash collisions, performance will decrease.
Asa@0: 		
Asa@0: 	Major assumptions upheld:
Asa@0: 	- ALLOWS scheduling multiple timers with the same funcref/method
Asa@0: 	- ALLOWS scheduling more timers during OnUpdate processing
Asa@0: 	- ALLOWS unscheduling ANY timer (including the current running one) at any time, including during OnUpdate processing
Asa@0: ]]
Asa@0: 
Asa@0: local MAJOR, MINOR = "AceTimer-3.0", 5
Asa@0: local AceTimer, oldminor = LibStub:NewLibrary(MAJOR, MINOR)
Asa@0: 
Asa@0: if not AceTimer then return end -- No upgrade needed
Asa@0: 
Asa@0: AceTimer.hash = AceTimer.hash or {}         -- Array of [0..BUCKET-1] = linked list of timers (using .next member)
Asa@0:                                             -- Linked list gets around ACE-88 and ACE-90.
Asa@0: AceTimer.selfs = AceTimer.selfs or {}       -- Array of [self]={[handle]=timerobj, [handle2]=timerobj2, ...}
Asa@0: AceTimer.frame = AceTimer.frame or CreateFrame("Frame", "AceTimer30Frame")
Asa@0: 
Asa@0: -- Lua APIs
Asa@0: local assert, error, loadstring = assert, error, loadstring
Asa@0: local setmetatable, rawset, rawget = setmetatable, rawset, rawget
Asa@0: local select, pairs, type, next, tostring = select, pairs, type, next, tostring
Asa@0: local floor, max, min = math.floor, math.max, math.min
Asa@0: local tconcat = table.concat
Asa@0: 
Asa@0: -- WoW APIs
Asa@0: local GetTime = GetTime
Asa@0: 
Asa@0: -- Global vars/functions that we don't upvalue since they might get hooked, or upgraded
Asa@0: -- List them here for Mikk's FindGlobals script
Asa@0: -- GLOBALS: DEFAULT_CHAT_FRAME, geterrorhandler
Asa@0: 
Asa@0: -- Simple ONE-SHOT timer cache. Much more efficient than a full compost for our purposes.
Asa@0: local timerCache = nil
Asa@0: 
Asa@0: --[[
Asa@0: 	Timers will not be fired more often than HZ-1 times per second. 
Asa@0: 	Keep at intended speed PLUS ONE or we get bitten by floating point rounding errors (n.5 + 0.1 can be n.599999)
Asa@0: 	If this is ever LOWERED, all existing timers need to be enforced to have a delay >= 1/HZ on lib upgrade.
Asa@0: 	If this number is ever changed, all entries need to be rehashed on lib upgrade.
Asa@0: 	]]
Asa@0: local HZ = 11
Asa@0: 
Asa@0: --[[
Asa@0: 	Prime for good distribution
Asa@0: 	If this number is ever changed, all entries need to be rehashed on lib upgrade.
Asa@0: ]]
Asa@0: local BUCKETS = 131
Asa@0: 
Asa@0: local hash = AceTimer.hash
Asa@0: for i=1,BUCKETS do
Asa@0: 	hash[i] = hash[i] or false	-- make it an integer-indexed array; it's faster than hashes
Asa@0: end
Asa@0: 
Asa@0: --[[
Asa@0: 	 xpcall safecall implementation
Asa@0: ]]
Asa@0: local xpcall = xpcall
Asa@0: 
Asa@0: local function errorhandler(err)
Asa@0: 	return geterrorhandler()(err)
Asa@0: end
Asa@0: 
Asa@0: local function CreateDispatcher(argCount)
Asa@0: 	local code = [[
Asa@0: 		local xpcall, eh = ...	-- our arguments are received as unnamed values in "..." since we don't have a proper function declaration
Asa@0: 		local method, ARGS
Asa@0: 		local function call() return method(ARGS) end
Asa@0: 	
Asa@0: 		local function dispatch(func, ...)
Asa@0: 			 method = func
Asa@0: 			 if not method then return end
Asa@0: 			 ARGS = ...
Asa@0: 			 return xpcall(call, eh)
Asa@0: 		end
Asa@0: 	
Asa@0: 		return dispatch
Asa@0: 	]]
Asa@0: 	
Asa@0: 	local ARGS = {}
Asa@0: 	for i = 1, argCount do ARGS[i] = "arg"..i end
Asa@0: 	code = code:gsub("ARGS", tconcat(ARGS, ", "))
Asa@0: 	return assert(loadstring(code, "safecall Dispatcher["..argCount.."]"))(xpcall, errorhandler)
Asa@0: end
Asa@0: 
Asa@0: local Dispatchers = setmetatable({}, {
Asa@0: 	__index=function(self, argCount)
Asa@0: 		local dispatcher = CreateDispatcher(argCount)
Asa@0: 		rawset(self, argCount, dispatcher)
Asa@0: 		return dispatcher
Asa@0: 	end
Asa@0: })
Asa@0: Dispatchers[0] = function(func)
Asa@0: 	return xpcall(func, errorhandler)
Asa@0: end
Asa@0:  
Asa@0: local function safecall(func, ...)
Asa@0: 	return Dispatchers[select('#', ...)](func, ...)
Asa@0: end
Asa@0: 
Asa@0: local lastint = floor(GetTime() * HZ)
Asa@0: 
Asa@0: -- --------------------------------------------------------------------
Asa@0: -- OnUpdate handler
Asa@0: --
Asa@0: -- traverse buckets, always chasing "now", and fire timers that have expired
Asa@0: 
Asa@0: local function OnUpdate()
Asa@0: 	local now = GetTime()
Asa@0: 	local nowint = floor(now * HZ)
Asa@0: 	
Asa@0: 	-- Have we passed into a new hash bucket?
Asa@0: 	if nowint == lastint then return end
Asa@0: 	
Asa@0: 	local soon = now + 1 -- +1 is safe as long as 1 < HZ < BUCKETS/2
Asa@0: 	
Asa@0: 	-- Pass through each bucket at most once
Asa@0: 	-- Happens on e.g. instance loads, but COULD happen on high local load situations also
Asa@0: 	for curint = (max(lastint, nowint - BUCKETS) + 1), nowint do -- loop until we catch up with "now", usually only 1 iteration
Asa@0: 		local curbucket = (curint % BUCKETS)+1
Asa@0: 		-- Yank the list of timers out of the bucket and empty it. This allows reinsertion in the currently-processed bucket from callbacks.
Asa@0: 		local nexttimer = hash[curbucket]
Asa@0: 		hash[curbucket] = false -- false rather than nil to prevent the array from becoming a hash
Asa@0: 
Asa@0: 		while nexttimer do
Asa@0: 			local timer = nexttimer
Asa@0: 			nexttimer = timer.next
Asa@0: 			local when = timer.when
Asa@0: 			
Asa@0: 			if when < soon then
Asa@0: 				-- Call the timer func, either as a method on given object, or a straight function ref
Asa@0: 				local callback = timer.callback
Asa@0: 				if type(callback) == "string" then
Asa@0: 					safecall(timer.object[callback], timer.object, timer.arg)
Asa@0: 				elseif callback then
Asa@0: 					safecall(callback, timer.arg)
Asa@0: 				else
Asa@0: 					-- probably nilled out by CancelTimer
Asa@0: 					timer.delay = nil -- don't reschedule it
Asa@0: 				end
Asa@0: 
Asa@0: 				local delay = timer.delay	-- NOW make a local copy, can't do it earlier in case the timer cancelled itself in the callback
Asa@0: 				
Asa@0: 				if not delay then
Asa@0: 					-- single-shot timer (or cancelled)
Asa@0: 					AceTimer.selfs[timer.object][tostring(timer)] = nil
Asa@0: 					timerCache = timer
Asa@0: 				else
Asa@0: 					-- repeating timer
Asa@0: 					local newtime = when + delay
Asa@0: 					if newtime < now then -- Keep lag from making us firing a timer unnecessarily. (Note that this still won't catch too-short-delay timers though.)
Asa@0: 						newtime = now + delay
Asa@0: 					end
Asa@0: 					timer.when = newtime
Asa@0: 					
Asa@0: 					-- add next timer execution to the correct bucket
Asa@0: 					local bucket = (floor(newtime * HZ) % BUCKETS) + 1
Asa@0: 					timer.next = hash[bucket]
Asa@0: 					hash[bucket] = timer
Asa@0: 				end
Asa@0: 			else -- if when>=soon 
Asa@0: 				-- reinsert (yeah, somewhat expensive, but shouldn't be happening too often either due to hash distribution)
Asa@0: 				timer.next = hash[curbucket]
Asa@0: 				hash[curbucket] = timer
Asa@0: 			end -- if when<soon ... else
Asa@0: 		end -- while nexttimer do
Asa@0: 	end -- for curint=lastint,nowint
Asa@0: 	
Asa@0: 	lastint = nowint
Asa@0: end
Asa@0: 
Asa@0: -- ---------------------------------------------------------------------
Asa@0: -- Reg( callback, delay, arg, repeating )
Asa@0: --
Asa@0: -- callback( function or string ) - direct function ref or method name in our object for the callback
Asa@0: -- delay(int) - delay for the timer
Asa@0: -- arg(variant) - any argument to be passed to the callback function
Asa@0: -- repeating(boolean) - repeating timer, or oneshot
Asa@0: --
Asa@0: -- returns the handle of the timer for later processing (canceling etc)
Asa@0: local function Reg(self, callback, delay, arg, repeating)
Asa@0: 	if type(callback) ~= "string" and type(callback) ~= "function" then 
Asa@0: 		local error_origin = repeating and "ScheduleRepeatingTimer" or "ScheduleTimer"
Asa@0: 		error(MAJOR..": " .. error_origin .. "(callback, delay, arg): 'callback' - function or method name expected.", 3)
Asa@0: 	end
Asa@0: 	if type(callback) == "string" then
Asa@0: 		if type(self)~="table" then
Asa@0: 			local error_origin = repeating and "ScheduleRepeatingTimer" or "ScheduleTimer"
Asa@0: 			error(MAJOR..": " .. error_origin .. "(\"methodName\", delay, arg): 'self' - must be a table.", 3)
Asa@0: 		end
Asa@0: 		if type(self[callback]) ~= "function" then 
Asa@0: 			local error_origin = repeating and "ScheduleRepeatingTimer" or "ScheduleTimer"
Asa@0: 			error(MAJOR..": " .. error_origin .. "(\"methodName\", delay, arg): 'methodName' - method not found on target object.", 3)
Asa@0: 		end
Asa@0: 	end
Asa@0: 	
Asa@0: 	if delay < (1 / (HZ - 1)) then
Asa@0: 		delay = 1 / (HZ - 1)
Asa@0: 	end
Asa@0: 	
Asa@0: 	-- Create and stuff timer in the correct hash bucket
Asa@0: 	local now = GetTime()
Asa@0: 	
Asa@0: 	local timer = timerCache or {}	-- Get new timer object (from cache if available)
Asa@0: 	timerCache = nil
Asa@0: 	
Asa@0: 	timer.object = self
Asa@0: 	timer.callback = callback
Asa@0: 	timer.delay = (repeating and delay)
Asa@0: 	timer.arg = arg
Asa@0: 	timer.when = now + delay
Asa@0: 
Asa@0: 	local bucket = (floor((now+delay)*HZ) % BUCKETS) + 1
Asa@0: 	timer.next = hash[bucket]
Asa@0: 	hash[bucket] = timer
Asa@0: 	
Asa@0: 	-- Insert timer in our self->handle->timer registry
Asa@0: 	local handle = tostring(timer)
Asa@0: 	
Asa@0: 	local selftimers = AceTimer.selfs[self]
Asa@0: 	if not selftimers then
Asa@0: 		selftimers = {}
Asa@0: 		AceTimer.selfs[self] = selftimers
Asa@0: 	end
Asa@0: 	selftimers[handle] = timer
Asa@0: 	selftimers.__ops = (selftimers.__ops or 0) + 1
Asa@0: 	
Asa@0: 	return handle
Asa@0: end
Asa@0: 
Asa@0: --- Schedule a new one-shot timer.
Asa@0: -- The timer will fire once in `delay` seconds, unless canceled before.
Asa@0: -- @param callback Callback function for the timer pulse (funcref or method name).
Asa@0: -- @param delay Delay for the timer, in seconds.
Asa@0: -- @param arg An optional argument to be passed to the callback function.
Asa@0: -- @usage
Asa@0: -- MyAddon = LibStub("AceAddon-3.0"):NewAddon("TimerTest", "AceTimer-3.0")
Asa@0: -- 
Asa@0: -- function MyAddon:OnEnable()
Asa@0: --   self:ScheduleTimer("TimerFeedback", 5)
Asa@0: -- end
Asa@0: --
Asa@0: -- function MyAddon:TimerFeedback()
Asa@0: --   print("5 seconds passed")
Asa@0: -- end
Asa@0: function AceTimer:ScheduleTimer(callback, delay, arg)
Asa@0: 	return Reg(self, callback, delay, arg)
Asa@0: end
Asa@0: 
Asa@0: --- Schedule a repeating timer.
Asa@0: -- The timer will fire every `delay` seconds, until canceled.
Asa@0: -- @param callback Callback function for the timer pulse (funcref or method name).
Asa@0: -- @param delay Delay for the timer, in seconds.
Asa@0: -- @param arg An optional argument to be passed to the callback function.
Asa@0: -- @usage
Asa@0: -- MyAddon = LibStub("AceAddon-3.0"):NewAddon("TimerTest", "AceTimer-3.0")
Asa@0: -- 
Asa@0: -- function MyAddon:OnEnable()
Asa@0: --   self.timerCount = 0
Asa@0: --   self.testTimer = self:ScheduleRepeatingTimer("TimerFeedback", 5)
Asa@0: -- end
Asa@0: --
Asa@0: -- function MyAddon:TimerFeedback()
Asa@0: --   self.timerCount = self.timerCount + 1
Asa@0: --   print(("%d seconds passed"):format(5 * self.timerCount))
Asa@0: --   -- run 30 seconds in total
Asa@0: --   if self.timerCount == 6 then
Asa@0: --     self:CancelTimer(self.testTimer)
Asa@0: --   end
Asa@0: -- end
Asa@0: function AceTimer:ScheduleRepeatingTimer(callback, delay, arg)
Asa@0: 	return Reg(self, callback, delay, arg, true)
Asa@0: end
Asa@0: 
Asa@0: --- Cancels a timer with the given handle, registered by the same addon object as used for `:ScheduleTimer`
Asa@0: -- Both one-shot and repeating timers can be canceled with this function, as long as the `handle` is valid
Asa@0: -- and the timer has not fired yet or was canceled before.
Asa@0: -- @param handle The handle of the timer, as returned by `:ScheduleTimer` or `:ScheduleRepeatingTimer`
Asa@0: -- @param silent If true, no error is raised if the timer handle is invalid (expired or already canceled)
Asa@0: -- @return True if the timer was successfully cancelled.
Asa@0: function AceTimer:CancelTimer(handle, silent)
Asa@0: 	if not handle then return end -- nil handle -> bail out without erroring
Asa@0: 	if type(handle) ~= "string" then
Asa@0: 		error(MAJOR..": CancelTimer(handle): 'handle' - expected a string", 2)	-- for now, anyway
Asa@0: 	end
Asa@0: 	local selftimers = AceTimer.selfs[self]
Asa@0: 	local timer = selftimers and selftimers[handle]
Asa@0: 	if silent then
Asa@0: 		if timer then
Asa@0: 			timer.callback = nil	-- don't run it again
Asa@0: 			timer.delay = nil		-- if this is the currently-executing one: don't even reschedule 
Asa@0: 			-- The timer object is removed in the OnUpdate loop
Asa@0: 		end
Asa@0: 		return not not timer	-- might return "true" even if we double-cancel. we'll live.
Asa@0: 	else
Asa@0: 		if not timer then
Asa@0: 			geterrorhandler()(MAJOR..": CancelTimer(handle[, silent]): '"..tostring(handle).."' - no such timer registered")
Asa@0: 			return false
Asa@0: 		end
Asa@0: 		if not timer.callback then 
Asa@0: 			geterrorhandler()(MAJOR..": CancelTimer(handle[, silent]): '"..tostring(handle).."' - timer already cancelled or expired")
Asa@0: 			return false
Asa@0: 		end
Asa@0: 		timer.callback = nil	-- don't run it again
Asa@0: 		timer.delay = nil		-- if this is the currently-executing one: don't even reschedule 
Asa@0: 		return true
Asa@0: 	end
Asa@0: end
Asa@0: 
Asa@0: --- Cancels all timers registered to the current addon object ('self')
Asa@0: function AceTimer:CancelAllTimers()
Asa@0: 	if not(type(self) == "string" or type(self) == "table") then
Asa@0: 		error(MAJOR..": CancelAllTimers(): 'self' - must be a string or a table",2)
Asa@0: 	end
Asa@0: 	if self == AceTimer then
Asa@0: 		error(MAJOR..": CancelAllTimers(): supply a meaningful 'self'", 2)
Asa@0: 	end
Asa@0: 	
Asa@0: 	local selftimers = AceTimer.selfs[self]
Asa@0: 	if selftimers then
Asa@0: 		for handle,v in pairs(selftimers) do
Asa@0: 			if type(v) == "table" then  -- avoid __ops, etc
Asa@0: 				AceTimer.CancelTimer(self, handle, true)
Asa@0: 			end
Asa@0: 		end
Asa@0: 	end
Asa@0: end
Asa@0: 
Asa@0: --- Returns the time left for a timer with the given handle, registered by the current addon object ('self').
Asa@0: -- This function will raise a warning when the handle is invalid, but not stop execution.
Asa@0: -- @param handle The handle of the timer, as returned by `:ScheduleTimer` or `:ScheduleRepeatingTimer`
Asa@0: -- @return The time left on the timer, or false if the handle is invalid.
Asa@0: function AceTimer:TimeLeft(handle)
Asa@0: 	if not handle then return end
Asa@0: 	if type(handle) ~= "string" then
Asa@0: 		error(MAJOR..": TimeLeft(handle): 'handle' - expected a string", 2)    -- for now, anyway
Asa@0: 	end
Asa@0: 	local selftimers = AceTimer.selfs[self]
Asa@0: 	local timer = selftimers and selftimers[handle]
Asa@0: 	if not timer then
Asa@0: 		geterrorhandler()(MAJOR..": TimeLeft(handle): '"..tostring(handle).."' - no such timer registered")
Asa@0: 		return false
Asa@0: 	end
Asa@0: 	return timer.when - GetTime()
Asa@0: end
Asa@0: 
Asa@0: 
Asa@0: -- ---------------------------------------------------------------------
Asa@0: -- PLAYER_REGEN_ENABLED: Run through our .selfs[] array step by step
Asa@0: -- and clean it out - otherwise the table indices can grow indefinitely
Asa@0: -- if an addon starts and stops a lot of timers. AceBucket does this!
Asa@0: --
Asa@0: -- See ACE-94 and tests/AceTimer-3.0-ACE-94.lua
Asa@0: 
Asa@0: local lastCleaned = nil
Asa@0: 
Asa@0: local function OnEvent(this, event)
Asa@0: 	if event~="PLAYER_REGEN_ENABLED" then
Asa@0: 		return
Asa@0: 	end
Asa@0: 	
Asa@0: 	-- Get the next 'self' to process
Asa@0: 	local selfs = AceTimer.selfs
Asa@0: 	local self = next(selfs, lastCleaned)
Asa@0: 	if not self then
Asa@0: 		self = next(selfs)
Asa@0: 	end
Asa@0: 	lastCleaned = self
Asa@0: 	if not self then	-- should only happen if .selfs[] is empty
Asa@0: 		return
Asa@0: 	end
Asa@0: 	
Asa@0: 	-- Time to clean it out?
Asa@0: 	local list = selfs[self]
Asa@0: 	if (list.__ops or 0) < 250 then	-- 250 slosh indices = ~10KB wasted (max!). For one 'self'.
Asa@0: 		return
Asa@0: 	end
Asa@0: 	
Asa@0: 	-- Create a new table and copy all members over
Asa@0: 	local newlist = {}
Asa@0: 	local n=0
Asa@0: 	for k,v in pairs(list) do
Asa@0: 		newlist[k] = v
Asa@0: 		n=n+1
Asa@0: 	end
Asa@0: 	newlist.__ops = 0	-- Reset operation count
Asa@0: 	
Asa@0: 	-- And since we now have a count of the number of live timers, check that it's reasonable. Emit a warning if not.
Asa@0: 	if n>BUCKETS then
Asa@0: 		DEFAULT_CHAT_FRAME:AddMessage(MAJOR..": Warning: The addon/module '"..tostring(self).."' has "..n.." live timers. Surely that's not intended?")
Asa@0: 	end
Asa@0: 	
Asa@0: 	selfs[self] = newlist
Asa@0: end
Asa@0: 
Asa@0: -- ---------------------------------------------------------------------
Asa@0: -- Embed handling
Asa@0: 
Asa@0: AceTimer.embeds = AceTimer.embeds or {}
Asa@0: 
Asa@0: local mixins = {
Asa@0: 	"ScheduleTimer", "ScheduleRepeatingTimer", 
Asa@0: 	"CancelTimer", "CancelAllTimers",
Asa@0: 	"TimeLeft"
Asa@0: }
Asa@0: 
Asa@0: function AceTimer:Embed(target)
Asa@0: 	AceTimer.embeds[target] = true
Asa@0: 	for _,v in pairs(mixins) do
Asa@0: 		target[v] = AceTimer[v]
Asa@0: 	end
Asa@0: 	return target
Asa@0: end
Asa@0: 
Asa@0: -- AceTimer:OnEmbedDisable( target )
Asa@0: -- target (object) - target object that AceTimer is embedded in.
Asa@0: --
Asa@0: -- cancel all timers registered for the object
Asa@0: function AceTimer:OnEmbedDisable( target )
Asa@0: 	target:CancelAllTimers()
Asa@0: end
Asa@0: 
Asa@0: 
Asa@0: for addon in pairs(AceTimer.embeds) do
Asa@0: 	AceTimer:Embed(addon)
Asa@0: end
Asa@0: 
Asa@0: -- ---------------------------------------------------------------------
Asa@0: -- Debug tools (expose copies of internals to test suites)
Asa@0: AceTimer.debug = AceTimer.debug or {}
Asa@0: AceTimer.debug.HZ = HZ
Asa@0: AceTimer.debug.BUCKETS = BUCKETS
Asa@0: 
Asa@0: -- ---------------------------------------------------------------------
Asa@0: -- Finishing touchups
Asa@0: 
Asa@0: AceTimer.frame:SetScript("OnUpdate", OnUpdate)
Asa@0: AceTimer.frame:SetScript("OnEvent", OnEvent)
Asa@0: AceTimer.frame:RegisterEvent("PLAYER_REGEN_ENABLED")
Asa@0: 
Asa@0: -- In theory, we should hide&show the frame based on there being timers or not.
Asa@0: -- However, this job is fairly expensive, and the chance that there will 
Asa@0: -- actually be zero timers running is diminuitive to say the lest.