Re: Hooking stoptext

[Aditya Mahajan <adityam@umich.edu>]

On 2013-10-08, at 7:22 AM, Procházka Lukáš Ing. - Pontex s. r. o. <LPr@pontex.cz> wrote:

> Hello,
> 
> I'm trying to hook commands.stoptext()...
> 
> Here's a minimal example: why only the first image appears?
> 
> ----
> \startluacode
>  local cmd_p
>  local tab = {}
> 
>  f = function(a)
>    if not cmd_p then
>      cmd_p = commands.stoptext
> 
>      commands.stoptext = function(...)
>        context("Hook")
> 
>        for _, v in ipairs(tab) do
>          context.startTEXpage()
>            context.externalfigure{v}
>          context.stopTEXpage()
>        end
> 
>        cmd_p(...)
>      end
>    end
> 
>    table.insert(tab, a)
>  end
> \stopluacode
> 
> \starttext
>  A
>  \ctxlua{f("cow")}
>  \ctxlua{f("hacker")}
> \stoptext
> ----
> 
> When I modify the code:
> 
> ----
> ...
>        for _, v in ipairs(tab) do
>          --context.startTEXpage()
>            context.externalfigure{v}
>          --context.stopTEXpage()
>        end
> ...
> ----
> 
> all figures are shown OK.
> 
> Where's the problem?

An alternative is to use (untested)

\appendtoks ... \to \everystoptext 

Aditya
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