Re: dorecurse problem

[Rik Kabel <context@rik.users.panix.com>]

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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