> Hans Hagen <mailto:pragma@wxs.nl>
> 1. April 2016 um 09:21
> On 3/31/2016 9:28 PM, Jan Tosovsky wrote:
>> On 2016-03-31 Hans Hagen wrote:
>>> On 3/30/2016 8:55 PM, Jan Tosovsky wrote:
>>>> On 2014-01-30 Jan Tosovsky wrote:
>>>>>
>>>>> I'd expect that starting french quote sign outside the left
>>>>> text edge - similarly like it is aligned the main flow when
>>>>> the hanging feature is enabled.
>>>>>
>>>>> Now I've found it works as expected when the indenting is
>>>>> disabled...
>>>>
>>>> http://tracker.luatex.org/view.php?id=884
>>>
>>> indenting prohibits protrusion
>>>
>>
>> Good to know, thanks. I take it rather as a limitation.
>>
>> Use case:
>> - book uses global indentation
>> - there is poem typeset in narrower block
>> - there is punctuation in the first verse which disrupt optical 
>> margin alignment
>>
>> Are there alternative ways?
>
> in your example you use indentation to get a narrower block (and as 
> each line is a paragraph each line gets an indent box prepended) .. 
> you should use leftskip (\startnarrower...) in such cases
This is a bad example because there is no problem with \leftskip.

What he means is that protrusion at the left margin doesn’t at the begin 
of a paragraph when you use indentation.

%%% begin example
\definefontfeature[default][default][protrusion=quality]

\setupbodyfont[modern-designsize]

\setupalign[hanging]

\setupbackgrounds[text][leftframe=on]

\starttext

“How does this look?”

When you a short paragraph with a quotattion mark at the beginning above
another paragraph without a quotation mark the letters at the start of
both paragraph don’t align.

\blank[3*line]\setupindenting[yes,medium]

“How does this look?”

When you a short paragraph with a quotattion mark at the beginning above
another paragraph without a quotation mark the letters at the start of
both paragraph don’t align.

\blank[3*line]

\dontleavehmode\llap{“}How does this look?”

When you a short paragraph with a quotattion mark at the beginning above
another paragraph without a quotation mark the letters at the start of
both paragraph don’t align.

\stoptext
%%% end example

Wolfgang