Strange behaviour with columnar itemized text

* Strange behaviour with columnar itemized text
@ 2014-02-28  1:15 Thangalin
  2014-03-01  2:24 ` Thangalin
  0 siblings, 1 reply; 2+ messages in thread
From: Thangalin @ 2014-02-28  1:15 UTC (permalink / raw)
  To: mailing list for ConTeXt users

Hi,

I encountered two issues where itemized text within columns behaves
unexpectedly. There appear to be two issues, possibly related. I will
provide the shorter example first, which produces overlapping text on
the second page (http://i.imgur.com/zMW6yk4.png).

Changing \blank[.2em] to \blank[small] resolves the first issue.
Removing inbetween={\blank[small]}, resolves the second issue. Given
that changing the \blank command affects the results, I think they
might be related somehow.

I'm not concerned about the first issue -- changing ".25em" to "small"
is fine. The second issue, however, leaves me perplexed for a solution
to avoid the issue while maintaining the desired vertical whitespace
(see (http://i.imgur.com/n46zEhf.png) between items. Any suggestions?

Hopefully these are sufficiently minimal examples.

------------] 8< overlapping text 8< [------------
\setuphead[section][before={\testcolumn[3]},]
\defineitemgroup[Instructions][inbetween={\blank[.25em]},]

\starttext
\startmixedcolumns[
  align=right,
  balance=yes,
  grid=strut,
]
\dorecurse{5}{
\startsection[title={Section},]
\startInstructions
  \item{Preheat the oven to 400°F}\item{Put a few cups of salt in a
gratin dish and level it off}\item{Place a little of the prepared
butter mixture snail butter in an empty shell (about a teaspoon) and
then put a snail in after it}\item{Put another blob of the snail
butter on top until the snail is no longer visible in the shell (about
a teaspoon)}\item{Do this for the remaining shells a layer of snail
butter the snail itself and another layer of snail butter}\item{Now,
push all the prepared shells into the salt in the gratin dish such
that the shell openings are securely face up}\item{Make sure the
shells to stay securely face up so that the snail cooks in the snail
butter instead of the butter just leaking out}\item{If you have some
special escargot dishes you can place the shells in them instead of
the salt and gratin dish}\item{Ensure that the shells remain securely
face up so that the snail cooks in the snail butter}
\stopInstructions
}
\stopmixedcolumns
\stoptext
------------] 8< snip snip 8< [------------

The second, slightly longer example, shows text overlapping the footer
region (http://i.imgur.com/vUNyDmk.png) and extending off the second
page.

------------] 8< snip snip 8< [------------
\setuppapersize[letter][letter]
\definestartstop[RecipeIngredientGroup]
\definestartstop[RecipeInstructionGroup]
\defineitemgroup[RecipeIngredients]

\defineitemgroup[RecipeInstructions][
  inbetween={\blank[small]},
]

\setupstartstop[RecipeIngredientGroup][
  before={\startmixedcolumns[balance=yes,]},
]

\setupstartstop[RecipeInstructionGroup][
  before={\startmixedcolumns[grid=strut,]},
]

\setupstartstop[RecipeIngredientGroup,RecipeInstructionGroup,][
  after={\stopmixedcolumns},
]

\starttext
  \startRecipeIngredientGroup
  \startsubsection[title={Title},]
  \startRecipeIngredients
    \dorecurse{32}{\item{item}}
  \stopRecipeIngredients
  \stopsubsection
  \stopRecipeIngredientGroup

  \startRecipeInstructionGroup
  \startsubsection[title={Title},]
  \startRecipeInstructions
    \dorecurse{8}{\item{item}}
  \stopRecipeInstructions
  \stopsubsection

  \startsubsection[title={Title},]
  \startRecipeInstructions
    \dorecurse{32}{\item{item}}
  \stopRecipeInstructions
  \stopsubsection
  \stopRecipeInstructionGroup
\stoptext
------------] 8< snip snip 8< [------------
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