Re: [NTG-context] start/stop executed conditionally on mode ?

Le 7 juin 2020 à 23:19, Aditya Mahajan a écrit :

On Sun, 7 Jun 2020, Fabrice L wrote:

...

Dear List,

I would like to insert a page using (ideally) start/stop instructions. The problem is that this page should be inserted only in a certain mode. Consulting the mailing list, I thought the following code was working, but it’s not ! The code is executed in the mode as expected, but the following instructions ("Some other text... » in the exemple) is not typeset.

Here is a minimal (not working!) example:

% ———————————————————————————————————— \unexpanded\def\StartQuestionsList{ \startmode[ClassRoom] \page[yes] Here are some questions: \blank } \unexpanded\def\StopQuestionsList{ \page[yes] \stopmode } \definestartstop[Questions][ before=\StartQuestionsList, after=\StopQuestionsList ]

\startQuestions Question A…. Question B…. \stopQuestions

Some other text... % ————————————————————————————————————

So to be clear, I would like the result in the « ClassRoom » mode to be: % ———————————————————————————————————— Here are some questions:

Question A…. Question B….

Some other text... % ————————————————————————————————————

Otherwise to be: % ———————————————————————————————————— Some other text... % ————————————————————————————————————

If you only set `ClassRoom` mode at compile time (rather than setting and unsetting it the middle of the document), then you can do:

\definebuffer[Questions]

\startmode[ClassRoom] \define\StopQuestionsList {...}

\definestartstop[Questions][...] \stopmode

Thanks to Aditya, I have succeeded, but it was not trivial for me. So, in case somebody someday would need a detailed solution, here is a minimal example, and an explanation. A buffer « Questions » is defined. If in « ClassRoom » mode, a start/stop « Questions » is also defined. So when ConTeXt encounters the \startQuestions / \stopQuestions, if the « ClassRoom » mode is enabled, the buffer is processed (with some format if needed - framed here for the example), and if the mode « ClassRoom » is disabled, then nothing is process. You can add as many \startQuestions / \stopQuestions you wish. % ---------------------------------------------- \definebuffer[Questions] \enablemode[ClassRoom] % Try "On / Off » to process "\startQuestions / \stopQuestions » or not. \startmode[ClassRoom] \definestartstop[Questions][before={\startframedtext\red},after={\stopframedtext\blue}] \stopmode \starttext Before... \startQuestions The content of the buffer ! \stopQuestions After... \stoptext % ---------------------------------------------- Thanks Aditya ! Fabrice.

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