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87 lines
2.7 KiB
87 lines
2.7 KiB
2 years ago
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local _,rematch = ...
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local L = rematch.localization
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local C = rematch.constants
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rematch.events = {}
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local events = CreateFrame("Frame")
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-- indexed by event name, ordered list of {module,callback} where module can be a "name" and rematch.name
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-- is used as 'self' (or the given value if rematch[name] doesn't exist)
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local register = {}
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-- calls any registered callbacks in the order they were registered for the given event
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local function runCallbacks(self,event,...)
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if register[event] then
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for _,info in ipairs(register[event]) do
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if type(info[2])=="function" then
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info[2](rematch[info[1]] or info[1],...)
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end
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end
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end
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end
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events:SetScript("OnEvent",runCallbacks)
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-- raises an abitrary event for other parts of the addon to handle, such as REMATCH_PET_PICKED_UP
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function rematch.events:Fire(event,...)
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runCallbacks(self,event,...)
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end
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-- finds the index of a module's callback in the registered event, if it exists
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local function getModuleIndex(module,event)
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if register[event] then
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for index,info in pairs(register[event]) do
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if info[1]==module then
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return index
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end
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end
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end
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end
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-- any events flagged for removal will wait until all callbacks are handled for an event
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local function cleanup()
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for event,info in pairs(register) do
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for i=#info,1,-1 do
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if info[i][2]=="remove" then
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tremove(info,i)
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end
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end
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if #info==0 then
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if not event:match("^REMATCH_") then
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events:UnregisterEvent(event)
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end
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register[event] = nil
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end
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end
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end
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-- registers an event for a module with a callback
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function rematch.events:Register(module,event,callback)
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if not register[event] then
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register[event] = {}
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end
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local index = getModuleIndex(module,event)
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if not index then -- newly registered
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tinsert(register[event],{module,callback})
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if not event:match("^REMATCH_") then
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events:RegisterEvent(event)
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end
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elseif callback then -- already registered (or was flagged for remove), changing/restoring callback function
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register[event][index][2] = callback
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end
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end
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-- unregisters an event for a module
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function rematch.events:Unregister(module,event)
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if register[event] then
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local index = getModuleIndex(module,event)
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if index then
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register[event][index][2] = "remove"
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rematch.timer:Start(0,cleanup)
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end
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end
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end
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-- for debugging
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function rematch.events:GetRegister()
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return register
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end
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