On Tue, Apr 14, 2015 at 05:47:29PM +0100, David Carlisle wrote: > As noted in the release notes direction support now works in math > which is a good thing but a side effect seems to be that beginL endL > nodes are added to every math list
This is part of the TeX-XeT code actually and not related to the mentioned change. This is the part that ensure math is always set left-to-right even if the surrounding text is set right-to-left. > Would it be possible for the automatic beginL node _not_ to be added > if the current context was already left to right? That should be theoretically possible, but I don’t know how. My naïve attempt below does not work (in the sense that the condition is always false even if the text was surrounded by \beginR/\endR. So if someone can come up with a working patch, I’ll happily apply it. Regards, Khaled diff --git a/source/texk/web2c/xetexdir/xetex.web b/source/texk/web2c/xetexdir/xetex.web index cffc4a9..a488669 100644 --- a/source/texk/web2c/xetexdir/xetex.web +++ b/source/texk/web2c/xetexdir/xetex.web @@ -32475,10 +32475,12 @@ begin if p=null then safe_info:=-1@+else safe_info:=info(p); end; @ @<Append a |begin_L| to the tail of the current list@>= -tail_append(new_LR(begin_L_code)) +if safe_info(LR_ptr)=begin_R_code then + tail_append(new_LR(begin_L_code)) @ @<Append an |end_L| to the tail of the current list@>= -tail_append(new_LR(end_L_code)) +if safe_info(LR_ptr)=begin_R_code then + tail_append(new_LR(end_L_code)) @ When the stack-manipulation macros of this section are used below, variables |LR_ptr| and |LR_tmp| might be the global variables declared above, or they -------------------------------------------------- Subscriptions, Archive, and List information, etc.: http://tug.org/mailman/listinfo/xetex