[NTG-context] \doifelseoddpage not working as expected

[NTG-context] \doifelseoddpage not working as expected

[Berend de Boer via ntg-context]

Dear all,

I need something like \doifelseoddpage, but this does not work as
expected. See below example. You will notice that on page two you
still get the ODD text, with page number 1.

What's going on? Is there a proper way to detect what page I'm on?


Example:

\starttext

\dorecurse{70}{\doifelseoddpage{ODD \currentpage\par}{EVEN \currentpage\par}}

\stoptext


My system:

    context --version
    mtx-context     | ConTeXt Process Management 1.04
    mtx-context     |
    mtx-context     | main context file: /home/berend/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
    mtx-context     | current version: 2023.05.08 17:39
    mtx-context     | main context file: /home/berend/context/tex/texmf-context/tex/context/base/mkxl/context.mkxl
    mtx-context     | current version: 2023.05.08 17:39


-- 
All the best,

Berend de Boer
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Re: [NTG-context] \doifelseoddpage not working as expected

[Hans Hagen via ntg-context]

On 5/27/2023 6:00 AM, Berend de Boer via ntg-context wrote:
> Dear all,
> 
> I need something like \doifelseoddpage, but this does not work as
> expected. See below example. You will notice that on page two you
> still get the ODD text, with page number 1.
> 
> What's going on? Is there a proper way to detect what page I'm on?
> 
> Example:
> 
> \starttext
> 
> \dorecurse{70}{\doifelseoddpage{ODD \currentpage\par}{EVEN 
> \currentpage\par}}
> 
> \stoptext
> 
> My system:
> 
>     context --version
>     mtx-context     | ConTeXt Process Management 1.04
>     mtx-context     |
>     mtx-context     | main context file: 
> /home/berend/context/tex/texmf-context/tex/context/base/mkiv/context.mkiv
>     mtx-context     | current version: 2023.05.08 17:39
>     mtx-context     | main context file: 
> /home/berend/context/tex/texmf-context/tex/context/base/mkxl/context.mkxl
>     mtx-context     | current version: 2023.05.08 17:39
You never know when tex will break a page unless you are explicit so you 
typeset the status too soon.

\setuppagenumbering[alternative=doublesided]
% \setuppagenumbering[alternative={singlesided,doublesided}]

\starttext
     \dorecurse{200}{
         \dontleavehmode\signalrightpage
         \doifelserightpage{RIGHT}{LEFT}
         \doifelseoddpage  {ODD  }{EVEN}
         \par
     }
\stoptext

The rightpage check combined with putting a signal at the spot where you 
test will work ok.

The odd/even test works as expected when you're in the page builder 
(wrapping up the page).

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------

___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
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___________________________________________________________________________________

Re: [NTG-context] \doifelseoddpage not working as expected

[Henning Hraban Ramm via ntg-context]

Am 27.05.23 um 23:54 schrieb Hans Hagen via ntg-context:
> You never know when tex will break a page unless you are explicit so you 
> typeset the status too soon.
> 
> \setuppagenumbering[alternative=doublesided]
> % \setuppagenumbering[alternative={singlesided,doublesided}]
> 
> \starttext
>      \dorecurse{200}{
>          \dontleavehmode\signalrightpage
>          \doifelserightpage{RIGHT}{LEFT}
>          \doifelseoddpage  {ODD  }{EVEN}
>          \par
>      }
> \stoptext
> 
> The rightpage check combined with putting a signal at the spot where you 
> test will work ok.
> 
> The odd/even test works as expected when you're in the page builder 
> (wrapping up the page).

Is this also the right approach to check for the current page within a 
float placement?
Like
\startplacefigure[]
	\dontleavehmode\signalrightpage % necessary?
	\doifelserightpage{RIGHT}{LEFT}
	\doifelseoddpage  {ODD  }{EVEN}
\stopplacefigure
?

In my macros from 2015 I’m still using manual right/left page versions, 
and I’d like to enhance them.
I need e.g. different \offset values for \externalfigure depending on 
right/left page.

Hraban
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___________________________________________________________________________________

Re: [NTG-context] \doifelseoddpage not working as expected

[Hans Hagen via ntg-context]

On 5/29/2023 4:10 PM, Henning Hraban Ramm via ntg-context wrote:
> Am 27.05.23 um 23:54 schrieb Hans Hagen via ntg-context:
>> You never know when tex will break a page unless you are explicit so 
>> you typeset the status too soon.
>>
>> \setuppagenumbering[alternative=doublesided]
>> % \setuppagenumbering[alternative={singlesided,doublesided}]
>>
>> \starttext
>>      \dorecurse{200}{
>>          \dontleavehmode\signalrightpage
>>          \doifelserightpage{RIGHT}{LEFT}
>>          \doifelseoddpage  {ODD  }{EVEN}
>>          \par
>>      }
>> \stoptext
>>
>> The rightpage check combined with putting a signal at the spot where 
>> you test will work ok.
>>
>> The odd/even test works as expected when you're in the page builder 
>> (wrapping up the page).
> 
> Is this also the right approach to check for the current page within a 
> float placement?
> Like
> \startplacefigure[]
>      \dontleavehmode\signalrightpage % necessary?
>      \doifelserightpage{RIGHT}{LEFT}
>      \doifelseoddpage  {ODD  }{EVEN}
> \stopplacefigure
> ?
> 
> In my macros from 2015 I’m still using manual right/left page versions, 
> and I’d like to enhance them.
> I need e.g. different \offset values for \externalfigure depending on 
> right/left page.
normally you will use "inner*" and "outer*" placement there as in other 
cases (which uses the same tricks)

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
        tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : https://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : https://contextgarden.net
___________________________________________________________________________________

Re: [NTG-context] \doifelseoddpage not working as expected

[Henning Hraban Ramm via ntg-context]

Am 29.05.23 um 16:47 schrieb Hans Hagen via ntg-context:
>> Is this also the right approach to check for the current page within a 
>> float placement?
>> Like
>> \startplacefigure[]
>>      \dontleavehmode\signalrightpage % necessary?
>>      \doifelserightpage{RIGHT}{LEFT}
>>      \doifelseoddpage  {ODD  }{EVEN}
>> \stopplacefigure
>> ?
>>
>> In my macros from 2015 I’m still using manual right/left page 
>> versions, and I’d like to enhance them.
>> I need e.g. different \offset values for \externalfigure depending on 
>> right/left page.
> normally you will use "inner*" and "outer*" placement there as in other 
> cases (which uses the same tricks)

I have one macro to place an page-width image with bleed, it uses 
\placefigure[top] and then \offset to move the image, so that it starts 
with bleed on the top side and with/without on the left side depending 
on a parameter that I change manually if the page breaking changes. The 
caption must stay within the type area – that works so far.
But it shouldn’t be necessary to define left/right manually, and that’s 
my question: if these \doifs work correctly within a float placement.

Hraban

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maillist : ntg-context@ntg.nl / https://www.ntg.nl/mailman/listinfo/ntg-context
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