Re: \indenting[next] and math => no vertical space before the formula

[Aditya Mahajan <adityam@umich.edu>]

On Wed, 30 Apr 2008, Mikael Persson wrote:

> On Tue, Apr 29, 2008 at 6:49 AM, Aditya Mahajan <adityam@umich.edu> wrote:
>> On Mon, 28 Apr 2008, Mikael Persson wrote:
>>
>> > Hello again,
>> >
>> > * snip *
>> >>
>> >>  I could reproduce the result and have also a fix but I don't know what
>> >>  the correct
>> >>  reults should be and other people like Aditya should decide if it makes sense
>> >>  to change the current behaviour.
>> >>
>> >>  \def\startdisplaymath
>> >>   {\ifgridsnapping
>> >>      \beforedisplayspace
>> >>      \snapmathtogrid\vbox
>> > * snip *
>> >>  Wolfgang
>> >
>> > This fix seems not to solve the problem entirely. With this fix
>> > applied, If one now put a formula inside an enumeration one gets
>> > "double" space before the formula. This is a test file that shows the
>> > problem:
>>
>>  This is basically because in enumerations indenting is set to never.
>>
>>  You can see the same affect with
>>
>>  \setupindenting[no]
>>  \testtext
>>
>>  One possible fix is to add
>>
>>  indenting=(reset|next|first) %default is never
>>
>>  to the \setupenumeration command. For example
>>
>>
>> > \defineenumeration[example]
>> >        [text=Example,
>> >        location=serried,
>> >        width=fit,
>>           indenting=reset, %%<<<---- Add This
>>
>>>        distance=0.5em,
>> >       way=bysection,
>> >        ]
>>
>>  Another is to change \startdisplaymath to
>>
>>
>>  \def\startdisplaymath
>>    {\ifgridsnapping
>>       \beforedisplayspace
>>       \snapmathtogrid\vbox
>>
>>       \bgroup
>>       \informulatrue
>>      %\forgetall % breaks side floats
>>     \else
>>       \bgroup
>>       \parskip\formulaparskip % ! !
>>       \informulatrue
>>      %\forgetall % otherwise backgrounds fail
>>       \ifdim\lastskip<\zeropoint\else
>>         \par
>>         \ifvmode \ifdim\parskip>\zeropoint\relax
>>           \whitespace \vskip-\parskip % kind of forces and cancels again
>>         \fi \fi
>>       \fi
>>       \doif\displaygridcorrection{-\v!top}{\kern-\strutht}% new, currently only option/default
>>       \beforedisplayspace
>>       \par
>>       \ifvmode \ifdim\parskip>\zeropoint\relax \else
>>
>>        \ifindentfirstparagraph
>>           \verticalstrut
>>           \vskip-\struttotal
>>           \vskip-\baselineskip
>>         \fi\fi
>>       \fi
>>     \fi
>>     $$\setdisplaydimensions
>>     \setpredisplaysize\lastlinewidth
>>     \startinnermath}
>>
>>  But this is getting ugly.
>>
>>  Aditya
>>
>
> Thank you Aditya, but I don't get that to work. Both with
>
> ConTeXt  ver: 2007.04.03 13:01 MKII  fmt: 2008.4.24  int:
> english/english (with the fix earlier in this thread)
> and
> ConTeXt  ver: 2007.09.28 16:52 MKII  fmt: 2008.4.24  int:
> english/english (which is the one from new ubuntu, without the fix)
>
> this fails with the following error msg:
>
> %% Start error msg
> ! Illegal unit of measure (pt inserted).
> <to be read again>
>                   \chardef
> \@@in:reset ...rue \parindent \zerocount \chardef
>                                                  \indentingtoggle \zerocount
> \next1 #1,->\docomplexsetupindentingB {#1}
>                                          \doprocesscommaitem
> \doprocesscommalist ...item \gobbleoneargument #1,
>                                                  ]\relax \global \advance \...
> <argument> ...ndenting ]\docomplexsetupindentingB
>                                                  \checkeverypar \ifindentfi...
>
> \firstofoneargument #1->#1
>

An old bug (more than two month old :)

Also add this

\unprotect
\defineindentingmethod [\v!reset] {\indentfirstparagraphtrue
                                    \parindent\zeropoint%AM was \zerocount
                                    \chardef\indentingtoggle\zerocount}
\protect


Aditya
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