vanilla-wow-addons – Rev 1

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-- Inner cache metatable 
local subMeta = { 
-- Given a name, append it to the parent frame name, and then return
-- the result (cache it if it's found) 
        __index = function(t, name)
                local tn = type(name);
                if (tn == "string" or tn == "number") then
                        local realName = t._frameName .. name;
                        local realFrame = getglobal(realName);
                        if (realFrame) then
                                t[name] = realFrame;
                        end return realFrame;
                end
        end 
};

local topMeta = { 
        -- Given a frame or a frame name, create (or return) the subcache
        -- for that frame.
        __index = function(t, frame)
                local tf = type(frame);
                if (tf == "string") then
                        -- If we're passed a frame name, look up the frame behind
                        -- it and if it's found, get its subcache
                        local realFrame = getglobal(frame);
                        -- Prevent infinite looping
                        if (type(realFrame)=="table") then
                                local ret = t[realFrame];
                                if (ret) then
                                        t[frame] = ret;
                                end
                                return ret;
                        end
                elseif (tf == "table") then 
                        -- Must create a new caching subtable if frame is an
                        -- actual Frame.
                        local gn = frame.GetName;
                        if (gn) then
                                local ret = {};
                                ret._frame = frame;
                                ret._frameName = gn(frame);
                                setmetatable(ret, subMeta);
                                t[frame] = ret;
                                return ret;
                        end
                end 
        end
};
 -- Create a fresh subframe cache and return it.
 function CreateSubframeCache()
        local ret = {};
        setmetatable(ret, topMeta);
        return ret;
end

CT_RA_Cache = CreateSubframeCache();

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