On 23-5-2011 2:07, Otso Helenius wrote:

MKIV seems to have a problem in hyphenating long finnish compound words in MKIV 
(2011.05.18 22:26).
Here is a minimalist example (columns added to exaggerate the problem):

kolmivaihekilowattituntimittari ympäristöliiketoiminta 

Similarly with en-hyphenation and \input knuth, some of the lines stretch out 
in an ugly fashion.
What am I doing wrong? I don't have these problems in LaTeX.

it all depends on the defaults for tolerance and emergencystretch ... they determine where tex will break

in such an extreme case (narrow columns and long words) I'd just use


P.S. The punctuation characters should be partially hung out in a justified 
paragraph (similar to
what microtype package does on LaTeX). Wikipedia says ConTeXt has "interfaces 
for handling
microtypography" but they don't seem as apparent and as easy as using microtype 
on LaTeX.

fwiw: one has rather detailed control over what hangs and how much it hangs or protrudes (using character classes); we predefine a few cases in font-ext.lua but more can be defined if needed (not that I've noticed that much demand)

in the case of hz/protrusion "easy"can also easily become ugly

The wiki article Protrusion#MkIV presents \definefontfeature but I find it 
counterintuitive that one has to use


sure, (1) it's a font related feature that should be used with care and (2) you want to be able to turn it on and off

to enable the features. It is unclear if these lines switch the features on 
globally for all loaded fonts
(for example ttf/otf ones defined with \starttypescript). IMHO these features 
should be enabled by default
because they produce better typographic quality by default (which should be the 
preference), and could be
switched off anyway if wanted. The less setup lines one has to add before 
\starttext to get high quality
results the better.

it produces larger files, take more runtime and in most cases does not look better at all; for instance one can argue that protrusion gives more width but at the same time it introduces the boundary condition that some characters have to hang; or take hz (expansion) ... when applied so much that it gets visible, it will also lead to similar shapes in successive lines to look different

so, just enabling these features assuming that the output looks better is debatable (sometimes adding or removing a word is more effective)


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