On 10 Mar 2017, at 17:36, Hans Hagen <pragma@wxs.nl> wrote:

On 3/10/2017 10:07 AM, Michael Eidenbenz wrote:

hello,

i try to understand the difference of everybeforeoutput and everafteroutput to inject some pages. it seems as there is no difference.
\the\everybeforeoutput is placed after the output of the page:

\newtoks\Before
\appendtoks
\the\Before
\global\Before\emptytoks
\to\everybeforeoutput

\newtoks\After
\appendtoks
\the\After
\global\After\emptytoks
\to\everyafteroutput

\starttext
\input{knuth}\par
\appendtoks{before}\to\Before
\appendtoks{after}\to\After
\stoptext


this code in page-otr.mkvi seems to put it before the content:

\def\page_otf_set_engine_output_routine#content%
 {\global\output
    {\inotrtrue
     \the\everybeforeoutput
     #content\relax
     \the\everyafteroutput}}

can this be fixed?

there is nothing wrong .. you feed something in the output routine there

you can try to use one of the other \before\after ones but be aware of possible interferences with tex's state, hold content etc ... \startpostponing ... might do what you want

Hans

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