dorecurse problem

dorecurse problem

[Rik Kabel]

ConTeXters,

When \dorecurse is active in the following MWE, the lines of text are 
overprinted. At least, this is the case for me, please confirm it for 
yourself. When \dorecurse is disabled, the lines print as they should, 
separately. Please tell me what I am doing wrong with this, if anything, 
and how to fix it. (Running ConTeXt  ver: 2017.01.17 17:37 MKIV beta  
fmt: 2017.1.19 on Win10 x64. There are no errors in the log.)

    \definelayer
      [blocks]
      [width=\textwidth,
       height=\textheight]

    \setupbackgrounds
      [page]
      [background=blocks]

    \starttext
      \dorecurse{1}{          % comment to clear error
        \startstandardmakeup
          \setlayerframed
            [blocks]
            [preset=lefttop,
             frame=off,
             align=right]{
            \startlines
              Line one on the left
              Line two on the left
            \stoplines
          }
          \setlayerframed
            [blocks]
            [preset=righttop,
             frame=off,
             align=flushright]{
            \startlines
              thgir eht no eno eniL
              thgir eht no owt eniL
            \stoplines
          }
        \stopstandardmakeup
      }                       % comment to clear error
    \stoptext

-- 
Rik

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Re: dorecurse problem

[Otared Kavian]

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Hi Rik,

I can confirm the behaviour you are reporting (even without \startstandardmakeup—\stopstandardmakeup, but adding a line of text in the document in order to have an output).
It seems that \dorecurse suppresses the passage to another line, since if one says \dorecurse{10} the texts in the framed layer are typeset ten times on the same line, as if the command \startlines were not there.

Best regards: OK

> On 20 Jan 2017, at 04:34, Rik Kabel <context@rik.users.panix.com> wrote:
> 
> ConTeXters,
> 
> When \dorecurse is active in the following MWE, the lines of text are overprinted. At least, this is the case for me, please confirm it for yourself. When \dorecurse is disabled, the lines print as they should, separately. Please tell me what I am doing wrong with this, if anything, and how to fix it. (Running ConTeXt  ver: 2017.01.17 17:37 MKIV beta  fmt: 2017.1.19 on Win10 x64. There are no errors in the log.)
> 
>   \definelayer
>     [blocks]
>     [width=\textwidth,
>      height=\textheight]
> 
>   \setupbackgrounds
>     [page]
>     [background=blocks]
> 
>   \starttext
>     \dorecurse{1}{          % comment to clear error
>       \startstandardmakeup
>         \setlayerframed
>           [blocks]
>           [preset=lefttop,
>            frame=off,
>            align=right]{
>           \startlines
>             Line one on the left
>             Line two on the left
>           \stoplines
>         }
>         \setlayerframed
>           [blocks]
>           [preset=righttop,
>            frame=off,
>            align=flushright]{
>           \startlines
>             thgir eht no eno eniL
>             thgir eht no owt eniL
>           \stoplines
>         }
>       \stopstandardmakeup
>     }                       % comment to clear error
>   \stoptext
> 
> -- 
> Rik


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Re: dorecurse problem

[Aditya Mahajan]

On Thu, 19 Jan 2017, Rik Kabel wrote:

> ConTeXters,
>
> When \dorecurse is active in the following MWE, the lines of text are 
> overprinted. At least, this is the case for me, please confirm it for 
> yourself. When \dorecurse is disabled, the lines print as they should, 
> separately. Please tell me what I am doing wrong with this, if anything, 
> and how to fix it. (Running ConTeXt  ver: 2017.01.17 17:37 MKIV beta 
> fmt: 2017.1.19 on Win10 x64. There are no errors in the log.)

This has nothing to do with \dorecurse, but due to the fact that the 
argument of \dorecurse or any macro is parsed before the catcode changes 
introduced by \startlines come into effect. Here is a simpler example 
demonstrating similar behavior:

\def\test#1{#1}

\starttext
\test{Something
\startlines
Line one
Line two
\stoplines}
\stoptext

Depending on what you want to do, it should be possible to come up with a 
workaround.

Aditya

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___________________________________________________________________________________

Re: dorecurse problem

[Hans Hagen]

On 1/20/2017 8:59 AM, Aditya Mahajan wrote:
> On Thu, 19 Jan 2017, Rik Kabel wrote:
>
>> ConTeXters,
>>
>> When \dorecurse is active in the following MWE, the lines of text are
>> overprinted. At least, this is the case for me, please confirm it for
>> yourself. When \dorecurse is disabled, the lines print as they should,
>> separately. Please tell me what I am doing wrong with this, if
>> anything, and how to fix it. (Running ConTeXt  ver: 2017.01.17 17:37
>> MKIV beta fmt: 2017.1.19 on Win10 x64. There are no errors in the log.)
>
> This has nothing to do with \dorecurse, but due to the fact that the
> argument of \dorecurse or any macro is parsed before the catcode changes
> introduced by \startlines come into effect. Here is a simpler example
> demonstrating similar behavior:
>
> \def\test#1{#1}
>
> \starttext
> \test{Something
> \startlines
> Line one
> Line two
> \stoplines}
> \stoptext
>
> Depending on what you want to do, it should be possible to come up with
> a workaround.

\startbuffer
   \startstandardmakeup
     \setlayerframed
       [blocks]
       [preset=lefttop,
        frame=off,
        align=right]{
       \startlines
         Line one on the left
         Line two on the left
       \stoplines
     }
     \setlayerframed
       [blocks]
       [preset=righttop,
        frame=off,
        align=flushright]{
       \startlines
         thgir eht no eno eniL
         thgir eht no owt eniL
       \stoplines
     }
   \stopstandardmakeup
\stopbuffer

     \dorecurse{1}{
         \getbuffer
     }

-----------------------------------------------------------------
                                           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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___________________________________________________________________________________

Re: dorecurse problem

[Otared Kavian]

Hi Hans,

Unfortunately your workaround with \getbuffer does not produce the correct page: it gives only a blank page.

Thanks for your attention: OK

> On 20 Jan 2017, at 10:08, Hans Hagen <pragma@wxs.nl> wrote:
> 
> On 1/20/2017 8:59 AM, Aditya Mahajan wrote:
>> On Thu, 19 Jan 2017, Rik Kabel wrote:
>> 
>>> ConTeXters,
>>> 
>>> When \dorecurse is active in the following MWE, the lines of text are
>>> overprinted. At least, this is the case for me, please confirm it for
>>> yourself. When \dorecurse is disabled, the lines print as they should,
>>> separately. Please tell me what I am doing wrong with this, if
>>> anything, and how to fix it. (Running ConTeXt  ver: 2017.01.17 17:37
>>> MKIV beta fmt: 2017.1.19 on Win10 x64. There are no errors in the log.)
>> 
>> This has nothing to do with \dorecurse, but due to the fact that the
>> argument of \dorecurse or any macro is parsed before the catcode changes
>> introduced by \startlines come into effect. Here is a simpler example
>> demonstrating similar behavior:
>> 
>> \def\test#1{#1}
>> 
>> \starttext
>> \test{Something
>> \startlines
>> Line one
>> Line two
>> \stoplines}
>> \stoptext
>> 
>> Depending on what you want to do, it should be possible to come up with
>> a workaround.
> 
> \startbuffer
>  \startstandardmakeup
>    \setlayerframed
>      [blocks]
>      [preset=lefttop,
>       frame=off,
>       align=right]{
>      \startlines
>        Line one on the left
>        Line two on the left
>      \stoplines
>    }
>    \setlayerframed
>      [blocks]
>      [preset=righttop,
>       frame=off,
>       align=flushright]{
>      \startlines
>        thgir eht no eno eniL
>        thgir eht no owt eniL
>      \stoplines
>    }
>  \stopstandardmakeup
> \stopbuffer
> 
>    \dorecurse{1}{
>        \getbuffer
>    }
> 
> -----------------------------------------------------------------
>                                          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 / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________

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

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

Re: dorecurse problem

[Rik Kabel]

On 2017-01-20 11:42, Otared Kavian wrote:
> Hi Hans,
>
> Unfortunately your workaround with \getbuffer does not produce the correct page: it gives only a blank page.
>
> Thanks for your attention: OK
>
>> On 20 Jan 2017, at 10:08, Hans Hagen <pragma@wxs.nl> wrote:
>>
>> On 1/20/2017 8:59 AM, Aditya Mahajan wrote:
>>> On Thu, 19 Jan 2017, Rik Kabel wrote:
>>>
>>>> ConTeXters,
>>>>
>>>> When \dorecurse is active in the following MWE, the lines of text are
>>>> overprinted. At least, this is the case for me, please confirm it for
>>>> yourself. When \dorecurse is disabled, the lines print as they should,
>>>> separately. Please tell me what I am doing wrong with this, if
>>>> anything, and how to fix it. (Running ConTeXt  ver: 2017.01.17 17:37
>>>> MKIV beta fmt: 2017.1.19 on Win10 x64. There are no errors in the log.)
>>> This has nothing to do with \dorecurse, but due to the fact that the
>>> argument of \dorecurse or any macro is parsed before the catcode changes
>>> introduced by \startlines come into effect. Here is a simpler example
>>> demonstrating similar behavior:
>>>
>>> \def\test#1{#1}
>>>
>>> \starttext
>>> \test{Something
>>> \startlines
>>> Line one
>>> Line two
>>> \stoplines}
>>> \stoptext
>>>
>>> Depending on what you want to do, it should be possible to come up with
>>> a workaround.
>> \startbuffer
>>   \startstandardmakeup
>>     \setlayerframed
>>       [blocks]
>>       [preset=lefttop,
>>        frame=off,
>>        align=right]{
>>       \startlines
>>         Line one on the left
>>         Line two on the left
>>       \stoplines
>>     }
>>     \setlayerframed
>>       [blocks]
>>       [preset=righttop,
>>        frame=off,
>>        align=flushright]{
>>       \startlines
>>         thgir eht no eno eniL
>>         thgir eht no owt eniL
>>       \stoplines
>>     }
>>   \stopstandardmakeup
>> \stopbuffer
>>
>>     \dorecurse{1}{
>>         \getbuffer
>>     }
>>
>>
>> ___________________________________________________________________________________

Hans and Aditya,

Thank you for the explanation and the workaround.

Otared,

I am not sure what you are doing, but if you are using only the code 
snippet that Hans posted, you will get a blank page. You have to define 
the layer and page background in addition to Hans' snippet.

---
Rik

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Re: dorecurse problem

[Otared Kavian]

> On 20 Jan 2017, at 18:00, Rik Kabel <context@rik.users.panix.com> wrote:
> […]
> 
> Otared,
> 
> I am not sure what you are doing, but if you are using only the code snippet that Hans posted, you will get a blank page. You have to define the layer and page background in addition to Hans' snippet.

Oh yes… sorry, I am ashamed :-(
I just put the code sent by Hans below your’s, and then commented out your code, including the definition of layers and backgounds…

Indeed everything works as expected with a buffer.

Best regards: OK
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