On 3/31/2016 9:28 PM, Jan Tosovsky wrote:
On 2016-03-31 Hans Hagen wrote:
On 3/30/2016 9:53 PM, Jan Tosovsky wrote:
On 2016-03-22 Hans Hagen wrote:
On 3/21/2016 10:59 PM, Jan Tosovsky wrote:
On 2014-02-23 Hans Hagen wrote:
On 2/22/2014 2:38 PM, Jan Tosovsky wrote:
On 2014-02-22 Jan Tosovsky wrote:

when a punctuated phrase appears at the beginning of the
line, it is not protruded correctly when preceded by an
index term.

... \index{foo}>Bar< ...

A minimal example is available at
http://drifted.in/other/sample.tex

I'd be grateful for ignoring any non document content
preceding punctuation to avoid its influence on protrusion.

it's not that trivial

for the index we can cheat a bit but then i also need to
check lots of other cases for possible interference

you can try to do this:

\leftboundary\hbox{\index{foo}}....

Wow, I am quite satisfied with this solution.

Btw, I couldn't find any details for that \leftboundary command either in TeX 
[1] or ConTeXt [2] command references.

I've tried it just with \hbox{} and it works as well.

Couldn't this be generalized in a way - if you want protrusion even in edge 
cases, any inline commands have to be wrapped in \hbox{} ?

because for instance you wouldn't want to protrude into a constructed compound hyphen which is a inline construct, just as you don't want to protrude into a formula or something explicitely boxed

Hans

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