[luatex] Synchronize ERROR: unknown node type 11

[Hans Hagen]

On 3/20/2024 2:21 PM, Jérôme LAURENS wrote:
> 
> 
>> Le 20 mars 2024 à 08:20, Hans Hagen <j.hagen at xs4all.nl> a écrit :
>>
>> because in that case the mathnode *is* a glue node, that is: it's glue fields are used (and they have the same layout as a glue node) so synctex should just accept a math node as valid glue in luatex
> 
> This is not a good reason and not a good idea. What you are asking for is to duplicate the synctex information for math nodes with glue: once as math node and once as glue node. With such kind of duplication there is no gain in synchronization accuracy. On the contrary, the cost of synchronization is bigger (bigger write,  bigger read, bigger parse and bigger search) . So either use `synctexmath` or `synctexhorizontalruleorglue` but not both on the same node.
> 
> Another solution is to add a (multi) conditional do nothing chunk of code in `synctexhorizontalruleorglue`, just to fit LuaTeX code convenience, and update the synctex code documentation accordingly… That does not sound really right.
> 
> One more solution, in pdflistout.c, line 816 (or so), replace
> ```
> synctexhorizontalruleorglue(p, this_box);
> ```
> with
> ```
> If (type(p) != math_node) {// because synctexmath has already been called for math_node
>    synctexhorizontalruleorglue(p, this_box);
> }
> ```
> So simple and easy. Moreover, the synctex library is then used the proper wa
we won't change anything: just accept the math node math as glue because 
that's what it is there: a glue + math state

Hans

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