diff options
| -rw-r--r-- | luatexbase-mcb.dtx | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/luatexbase-mcb.dtx b/luatexbase-mcb.dtx index 9e91065..43bfef9 100644 --- a/luatexbase-mcb.dtx +++ b/luatexbase-mcb.dtx @@ -210,8 +210,16 @@ See source file '\inFileName' for details. % description used when adding the function to this callback. You can also % remove all functions from a callback at once using % \begin{verbatim} -% luatexbase.reset_callback(name) +% luatexbase.reset_callback(name, make_false) % \end{verbatim} +% The |make_false| argument is optional. If it is |true| (repeat: |true|, not +% |false|) then the value |false| is registered in the callback, which has a +% special meaning for some callback. +% +% Note that |reset_callback| is very invasive since it removes all functions +% possibly installed by other packages in this callback. So, use it with care +% if there is any chance that another package wants to share this callback +% with you. % % When new functions are added at the beginning of the list, other functions % are shifted down the list. To get the current rank of a function in a @@ -731,7 +739,7 @@ end % callback handler unless the callback is user-defined. % % \begin{macrocode} -function reset_callback (name) +function reset_callback (name, make_false) if not name or name == "" then err("unable to reset:\nno proper callback name passed") return @@ -740,7 +748,11 @@ function reset_callback (name) return end if not lua_callbacks_defaults[name] then - internalregister(name, nil) + if make_false == true then + internalregister(name, false) + else + internalregister(name, nil) + end end local l = callbacklist[name] if l then |