On 9/17/2013 8:57 PM, Lars Huttar wrote:
Can you point me to documentation on the constraints that define what
kind of interlinespace is sane?
the default is 2.8ex which is pretty safe, then there is the ht/dp ratio
which in some cases has to be adapted to fonts esp when they are
non-typical
Also, given the goal that "For using ConTeXt, no TeX programming skills
and no technical background are needed. Some basic knowledge of
typography and document design will enable you to use the full power of
ConTeXt" (http://wiki.contextgarden.net/What_is_ConTeXt), does/could
ConTeXt issue an error when its assumptions are violated?
well, adapting interlinespace is already beyond basic ... if you have
specifications from someplace else they are supposed to be experts (ok,
in many case we get weird specs too, but i always tend to ignore those)
\setbox0\hbox{Tg}\the\htdp0,\the\baselineskip
gives
10.59601pt,9.3pt
so, any line that has a character with ascender and descender will
enforce a larger than 9.3pt distance + lineskip and mess up any
prediction cq. heuristics
I can't find any reference defining \htdp0, but I'm guessing it means
the height+depth (where depth means how far descenders extend below the
baseline) of the "Tg" box.
indeed, \htdp is a convenient macro, you could also add two dimensions
or use a \dimexpr which is more work
I'm also confused as to why you're adding 9.3pt + lineskip, when in my
limited understanding of TeX, I understood lineskip to be *part* of the
distance between baselines, rather than an additional distance. But
maybe that's not important to the main issue.
\starttext
\showstruts \strut test \par \strut test
\showstruts \strut \ruledhbox{$\sqrt{test}$} \par \strut test
\stoptext
\lineskip (1pt by default) kicks in when the line distance minus
baselineskip exceeds \lineskiplimit (0pt by default)
I'm trying to formulate a rule for knowing whether "interlinespace is sane".
Is it that interlinespace needs to be more than or equal to the maximum
of (height + depth + lineskip) of any line in the text?
\setbox0\hbox{()} \the\htdp0
is the minumum and you'd better add one point at least
bodyfont/baseline : 10/12 12/14.4 etc are ok
Hans
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