Re: strange index behaviour with entries inside separatedlist

[Hans Hagen <pragma@wxs.nl>]

On 4/12/2013 12:59 PM, WolfgangZ wrote:
> Am 12.04.2013 10:29, schrieb Wolfgang Schuster:
>>
>> Am 12.04.2013 um 08:10 schrieb WolfgangZ <wollez@gmx.net>:
>>
>>> Hello,
>>> I get wrong list entries when using my register entries inside
>>> separate lists. Example case included, even if it is a bit longer.
>>> For explanation, I have two lists, the correct index is in section
>>> 1.2 in the attached example and printed on page 3 (see test.pdf). The
>>> one that causes trouble is set in section 1.3 (green table) and
>>> printed on page 5. There the index links to page 4 instead of page 1,
>>> on which the entry is placed.
>>>
>>> The example gets more strange, as the wrong index entries only occurs
>>> if there is no regular text below the table in section 1.3. For
>>> testing you can uncomment line 70 in file test.tex.
>>
>> Put the text before the index entry in your definition in \Listwrong
>> the output is correct:
>>
>>    \define[1]\Listwrong{#1\Wrongliste{#1}}
>>
>> Wolfgang
>
> Great, this solves the problem! Is it possible to explain the reason for
> the behavior of context to the order of the text entry and the command?

in order to track locations we need to inject a so called whatsit which 
is an invivible but definitely present entity an din order to make this 
work:

test

\index{xxx}

test

\index will bind to the next paragraph when it's a loner

otherwise we would get

test
<whitespace or at least valid breakpoint>
\index{xxx}
<whitespace or at least valid breakpoint>
test

which could show up as an unwanted extra whitespace and/or page break 
with dislocated index entry

this kind of behaviour has always been part of context, as we want to be 
able to do

\chapter{...}

\index{...}
\index{...}
\index{...}
\index{...}
\index{...}

some text ...

Hans


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