[NTG-context] Automatic negative tracking to prevent slight overfull hbox's

Hans Hagen pragma at wxs.nl
Sun Jan 17 19:27:29 CET 2016


On 1/16/2016 6:57 PM, Aditya Mahajan wrote:
> On Thu, 14 Jan 2016, Alexander Dyomin wrote:
>
>> Dear list,
>> when I stumble upon a slightly overhanging line (where it's not
>> allowed to hyphenate the hanging word and putting it on next line
>> leaves huge whitespaces), decreasing letterspacing in that line seems
>> like a good idea, and I manually insert \kerncharacters commands to do
>> the trick. Here's a MWE for the purpose of demonstration:
>>
>> % ConTeXt code
>> \setuppapersize[A5]
>> \setupbackgrounds[text]
>> [rightframe=on,framecolor=red,rulethickness=0.1pt] %right margin line
>>
>> \setupalign[hz,hanging] % microtypography enabled
>> \definefontfeature[default][default][protrusion=quality,expansion=quality]
>>
>>
>> \definetypeface[mainface][rm][specserif][Linux Libertine O] [default]
>> \setupbodyfont[mainface,14pt]
>>
>> \mainlanguage[russian]
>> \setupindenting[yes,medium,first]
>>
>> \starttext
>>
>> {\kerncharacters[-0.018] Здесь будет длинный-предлинный текст,
>> \mbox{в~коем}} никак нельзя перенести строку. Запрещено {
>> \kerncharacters[-0.008] разрывать телефонные номера, например,
>> \mbox{(000)1234-5678}}, многозначные числа и дефисные написания.
>> \stoptext
>>
>>
>> Is the a way for automating such negative tracking?
>
> I seem to remember seeing a demo (either by Hans or Idris) for Arabic
> typesetting where some optimizations were performed after the
> linebreaks. I wonder if similar approach could be used here.

that assumes features in the font that can make text run wider or narrower

easier is to use \setupalign[stretch,tolerant]



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