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* lmtx update
@ 2020-07-31  8:32 Hans Hagen
  2020-07-31  8:40 ` Taco Hoekwater
                   ` (3 more replies)
  0 siblings, 4 replies; 14+ messages in thread
From: Hans Hagen @ 2020-07-31  8:32 UTC (permalink / raw)
  To: mailing list for ConTeXt users

Hi,

Sorry for the long mail ...

One of the changes in lmtx is that we freeze the properties that 
determine the paragraph shape as well as breaking into lines in such a 
way that we have predictable behaviour. As a side effect it can be that 
existing code (lmtx only) will behave differently (will be fixed when we 
notice) but also that some low level user tweaking can not work, i.e. 
they are just ignored, but only when they happen mid paragraph which 
actually is always debatable anyway.

Now, if for some reasom you get unexpected results and can't wait for a 
fix, you can do this:

   \forgetparagraphfreezing : disables
   \setparagraphfreezing    : enables (default)

Of course it might have other side effects once in lmtx we everywhere 
expect freezing to be enabled. You can take a snapshot with:

   \freezeparagraphproperties  : snapshot relevant parameters
   \defrostparagraphproperties : resets snapshot

More efficient is snapshotting a subcategory:

   \updateparagraphproperties : all
   \updateparagraphpenalties  : only penalties
   \updateparagraphdemerits   : other than penalties
   \updateparagraphshapes     : hangindent etc

Don't use the low level commands that they use because we take plenty of 
time to experiment at that level and interfaces might evolve, for instance:

\frozen\hangindent 30pt
\frozen\hangafter  2

is valid and will likely stay.

We're talking of a conceptually rather different approach. Internally 
the engine is still doing the same things but we can control it a bit 
differently. Due to the way ConTeXt is set up, we can make such a 
paradigm shift without too much troubles. I'll wrap up more details in 
an article later.

Other work in progress is: better columns in itemize, esp proper 
footnote support (not that I ever need that but I know users do so ...), 
experiments work ok, but I need to check spacing. In general, footnotes 
(will) behave a bit better, especially those used nested in other 
mechanisms. A side effect of more control is that we can do other tricks 
too and we're playing with it (kind of fun).

More work in progress concerns paragraph wrappers and that will result 
in a rewrite of some existing mechanism (generic subsystems with 
instances), but that might as well go unnoticed.

To give an idea of possibilities, here is an example:

\definedescription[whatever][alternative=right:bottom]

\startwhatever{just a small\\example}
     \input ward
\stopwhatever

No one ever requested it so see it an a quick and dirty example but 
don't hesitate to ask for more anyway (we like an occasional challenge).

Anyway, it might take some weeks / iterations before all this settles 
down and now you can't say that we didn't warn you.

So far,

Hans

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^ permalink raw reply	[flat|nested] 14+ messages in thread

end of thread, other threads:[~2020-08-03 17:37 UTC | newest]

Thread overview: 14+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-07-31  8:32 lmtx update Hans Hagen
2020-07-31  8:40 ` Taco Hoekwater
2020-07-31 10:18   ` Hans Hagen
2020-08-01 13:20 ` Otared Kavian
2020-08-01 14:17   ` Hans Hagen
2020-08-01 16:20     ` Otared Kavian
2020-08-01 16:41   ` Henning Hraban Ramm
2020-08-01 16:57     ` Otared Kavian
2020-08-01 17:19       ` margin notes (was: lmtx update) Henning Hraban Ramm
2020-08-01 20:36         ` Otared Kavian
2020-08-01 21:01           ` Henning Hraban Ramm
2020-08-01 21:35             ` Otared Kavian
2020-08-02  3:30 ` lmtx update Aditya Mahajan
2020-08-03 17:37 ` Pablo Rodriguez

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