[NTG-context] Accessing raw titles in textcommand in TOC

[Hans Hagen]

On 2/21/2020 2:34 PM, alephzorro wrote:
> Hello,
> 
> I would like to display titles differently in TOC than they appear in 
> text. For example, MyChapter1 -> 1retpahCyM. Basically any highly 
> non-trivial transformation that really needs Lua.

\starttext

     \completecontent

     \startchapter[title={Sample Chapter},list={retpahC elpmaS}]
     \stopchapter

\stoptext


> I've written simple Lua macros before, but the following approach trying 
> to define textcommand does not work since I can't find the way to pass 
> the raw title to my transform function.
> 
> 
> 
> 
> \startluacode
> userdata = userdata or {}
> function userdata.mytransform(title)
>      --context(title) --this is just fine, but isn't very useful
>      context(string.reverse(title))
> end
> \stopluacode
> 
> \def\transformtitle#1%
>      {\ctxlua{userdata.mytransform([==[#1]==])}}
> 
> \setuplist[chapter][textcommand=\transformtitle]
> 
> 
> \starttext
> \completecontent
> 
> \startchapter[title={Sample Chapter}]
> \stopchapter
> \stoptext
> 
> 
> When I print the actual title that is passed to mytransform, all I get 
> is \currentlistentrytitle and I haven't succeed expanding it (and 
> there's all kind of formatting stuff and so on going on I suppose). 
> Sections have "deeptextcommand" which is somewhat what I'm after here, 
> but I've not found similar option for TOC. So, is there a way to get 
> just the raw titles?
> 
> Jason C.
> 
> 
> 
> 
> 
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