LoTROInterface SVN SequenceBars

-- New functions that supersede the ones in Utils.lua.

-- Needs to be in a separate file in case someone installs one of my plugins that contains an old copy of Utils.lua.

-- New versions of RemoveCallback() and DoCallbacks() that tolerate removing an event handler from within an event handler:

function _G.RemoveCallback(object, event, callback)

    if (callback == nil) then

        return;

    end

    local handlers = object[event];

    if (handlers == callback) then

        object[event] = nil;

    elseif (type(handlers) == "table") then

        local f, i;

        repeat

            i, f = next(handlers, i);

            if (f == callback) then

                handlers[i] = nil;

            end

        until (i == nil);

    end

end

function _G.DoCallbacks(object, event, args)

    local handlers = object[event];

    if (type(handlers) == "function") then

        handlers(object, args);

    elseif (type(handlers) == "table") then

        if (next(handlers) == nil) then

            -- If all handlers have been removed, remove the table.

            object[event] = nil;

        else

            local f, i;

            repeat

                i, f = next(handlers, i);

                if (type(f) == "function") then

                    f(object, args);

                end

            until (i == nil);

        end

    end

end