Bring in events external

externals/events.lua

@@ -0,0 +1,94 @@
+
+local myname, ns = ...
+
+
+local frame = CreateFrame("Frame")
+
+
+function ns.RegisterEvent(event, func)
+  frame:RegisterEvent(event)
+  if func then ns[event] = func end
+end
+
+
+function ns.UnregisterEvent(event)
+  frame:UnregisterEvent(event)
+end
+
+
+function ns.UnregisterAllEvents()
+	frame:UnregisterAllEvents()
+end
+
+
+-- Handles special OnLogin code for when the PLAYER_LOGIN event is fired.
+-- If our addon is loaded after that event is fired, then we call it immediately
+-- after the OnLoad handler is processed.
+local function ProcessOnLogin()
+  if ns.OnLogin then
+    ns.OnLogin()
+    ns.OnLogin = nil
+  end
+
+  ProcessOnLogin = nil
+  if not ns.PLAYER_LOGIN then frame:UnregisterEvent("PLAYER_LOGIN") end
+end
+
+
+-- Handle special OnLoad code when our addon has loaded, if present
+-- Also initializes the savedvar for us, if ns.dbname or ns.dbpcname is set
+-- If ns.ADDON_LOADED is defined, the ADDON_LOADED event is not unregistered
+local function ProcessOnLoad(arg1)
+  if arg1 ~= myname then return end
+
+  if ns.dbname then
+    local defaults = ns.dbdefaults or {}
+    _G[ns.dbname] = setmetatable(_G[ns.dbname] or {}, {__index = defaults})
+    ns.db = _G[ns.dbname]
+  end
+
+  if ns.dbpcname then
+    local defaults = ns.dbpcdefaults or {}
+    _G[ns.dbpcname] = setmetatable(_G[ns.dbpcname] or {}, {__index = defaults})
+    ns.dbpc = _G[ns.dbpcname]
+  end
+
+  if ns.OnLoad then
+    ns.OnLoad()
+    ns.OnLoad = nil
+  end
+
+  ProcessOnLoad = nil
+  if not ns.ADDON_LOADED then frame:UnregisterEvent("ADDON_LOADED") end
+
+  if ns.dbdefaults or ns.dbpcdefaults then ns.RegisterEvent("PLAYER_LOGOUT") end
+
+  if IsLoggedIn() then ProcessOnLogin()
+  else frame:RegisterEvent("PLAYER_LOGIN") end
+end
+
+
+-- Removes the default values from the db and dbpc as we're logging out
+local function ProcessLogout()
+  if ns.dbdefaults then
+    for i,v in pairs(ns.dbdefaults) do
+      if ns.db[i] == v then ns.db[i] = nil end
+    end
+  end
+
+  if ns.dbpcdefaults then
+    for i,v in pairs(ns.dbpcdefaults) do
+      if ns.dbpc[i] == v then ns.dbpc[i] = nil end
+    end
+  end
+end
+
+
+frame:RegisterEvent("ADDON_LOADED")
+frame:SetScript("OnEvent", function(self, event, arg1, ...)
+  if ProcessOnLoad and event == "ADDON_LOADED" then ProcessOnLoad(arg1) end
+  if ProcessOnLogin and event == "PLAYER_LOGIN" then ProcessOnLogin() end
+
+  if event == "PLAYER_LOGOUT" then ProcessLogout() end
+  if ns[event] then ns[event](event, arg1, ...) end
+end)