Thanks. Does the fix apply for similar= issue I raised with below where all paragraphs are indented (expected is t= hat first par is not indented) ?

<= /o:p>

\setupindenting[yes, next, 1em]

\starttext

\input knuth

\stoptext

De : Hans Hagen
Envoy=C3=A9 le :vendredi 20 novembre 2020 20:07
=C3=80 : mailing list for ConTeXt users; Wolfgang Schuster
Objet :<= /b>Re: [NTG-context] \noindentation not working

On 11/20/2020 6:27 PM, Wolfgan= g Schuster wrote:

> Pablo Rodriguez schrieb am 2= 0.11.2020 um 17:41:

>> Dear list,

>> I h= ave the following MWE:

>> \showframe\showgrid

>> \setupindenting[yes, always, big]

>> \starttext

= >> \noindentation

>> = ; a

>> a

>> &nb= sp; \stoptext

>> Using LMTX (2020.11.19 11:28), I get indentation with= \noindentation.

>> Could anyone confirm this?

> Yes, something is wrong.

> %%%% begin example

> \showgrid

> \starttext

> \parindent\emwidth

> a

> \eve= rypar{\setbox\scratchbox\lastbox}

> a

> \stoptext

> %%%% end example

=
Ah, okay. We have normalization enabled now. That mean= s two things:

- instead if a hbox being used for indentation (with >=3D 0 width) = we now
have a skip (with no stretch but that might= become an option some day);
the tex engine uses a= hbox because it is easier on the par builder (less
checking, as glue, being a valid breakpoint, involves quite a bit)

- after breakin= g a paragraph into lines the result is normalized, that
is: we have left/right hang, left/right skip. left/right parfilskip <= /p>
instead of a mix of either or not present left/righ= t skip, and shifted
boxes in case of some hang fea= tures (again, the original approach is
easier for = the engine, but machines are fast enough and have plenty of
memory so we can stop worrying about it)
=
The ideas is that this way we can= make some lua nodelist hackery more
elegant (but = I need to catch up with that: most tex files are now split
in mkiv and lmtx and next comes the lua files after which we can s= tart
some more drastic upgrading ... keep in mind = that quite some code is
from more than a decase ag= o, evolved a bit but seldom changed conceptually).
=
Here's a fix:

\unprotect

\def\spac_indentation_remo= ve
=C2=A0=C2=A0 {\ifzeropt\parindent \else
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \begingroup
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \unskip % we also need to check for = the subtype
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \setbox\= scratchbox\lastbox % we also need to check for the
= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \endgroup
=C2=A0=C2= =A0=C2=A0 \fi}

\protect

(we might need adapt some more code); actually more correct would be:=

\def\spa= c_indentation_remove
=C2=A0=C2=A0 {\ifzeropt\parind= ent \else
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \begingrou= p
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \ifnum\lastnodetyp= e=3D\gluenodecode
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0 \unskip % we also need to check for the subtype
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \orelse\ifnum\lastnodetype=3D\hlistno= decode
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \= setbox\scratchbox\lastbox % we also need to check for the subtype
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \else
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 % forget about it
=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 \fi
=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0 \endgroup
=C2=A0=C2=A0= =C2=A0 \fi}

(it actually makes sense to have a native \unindent primitive but we can=
simulate that in lua)

Hans
&n= bsp;
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