\e!start in lua

\e!start in lua

[Aditya Mahajan]

What is the best way to define the equivalent of

     \setvalue{\e!start\NAME}{...}

in lua.

     e_start = ??
     context.setvalue(e_start .. name, "...")

Thanks,
Aditya

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Re: \e!start in lua

[Wolfgang Schuster]

Am 15.01.2011 um 23:57 schrieb Aditya Mahajan:

> What is the best way to define the equivalent of
> 
>    \setvalue{\e!start\NAME}{...}
> 
> in lua.
> 
>    e_start = ??
>    context.setvalue(e_start .. name, "...")

\startluacode
context.setvalue("foo","\\framedtext")
context.setvalue(table.concat({"start","foo"}),"\\startframedtext")
context.setvalue(table.concat({"stop" ,"foo"}),"\\stopframedtext" )
\stopluacode

\starttext
\foo{foo}
\startfoo bar\stopfoo
\stoptext

You can also write “context.setvalue("start".."foo","…")” but table.concat
looks better but the question is why don’t you use just tex
to create the start/stop commands.

Wolfgang

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Re: \e!start in lua

[Hans Hagen]

On 15-1-2011 11:57, Aditya Mahajan wrote:
> What is the best way to define the equivalent of
>
> \setvalue{\e!start\NAME}{...}
>
> in lua.
>
> e_start = ??
> context.setvalue(e_start .. name, "...")

\starttext

\startluacode

local elements  = interfaces.complete.elements
local interface = storage.shared.currentinterface

local e_start = elements.start[currentinterface]
local e_stop  = elements.stop [currentinterface]

context.setvalue(e_start .. "something", "[[")
context.setvalue(e_stop  .. "something", "]]")

\stopluacode

\startsomething Yes we can!\stopsomething

\stoptext


(i should probably preload elements as well)

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
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Re: \e!start in lua

[Aditya Mahajan]

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On Sun, 16 Jan 2011, Wolfgang Schuster wrote:

>
> Am 15.01.2011 um 23:57 schrieb Aditya Mahajan:
>
>> What is the best way to define the equivalent of
>>
>>    \setvalue{\e!start\NAME}{...}
>>
>> in lua.
>>
>>    e_start = ??
>>    context.setvalue(e_start .. name, "...")
>
> \startluacode
> context.setvalue("foo","\\framedtext")
> context.setvalue(table.concat({"start","foo"}),"\\startframedtext")
> context.setvalue(table.concat({"stop" ,"foo"}),"\\stopframedtext" )
> \stopluacode
>
> \starttext
> \foo{foo}
> \startfoo bar\stopfoo
> \stoptext
>
This would just create \startfoo. \setvalue{\e!start foo} creates a 
interface specific command. The code that Hans posted does that. I am 
sorry that this was not clear in the question.

> You can also write “context.setvalue("start".."foo","…")” but table.concat
> looks better

OK.

> but the question is why don’t you use just tex
> to create the start/stop commands.

Because I find it much easier to understand expansion at lua level than at 
TeX level.

Thanks,
Aditya

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___________________________________________________________________________________

Re: \e!start in lua

[Aditya Mahajan]

On Sun, 16 Jan 2011, Hans Hagen wrote:

> On 15-1-2011 11:57, Aditya Mahajan wrote:
>> What is the best way to define the equivalent of
>> 
>> \setvalue{\e!start\NAME}{...}
>> 
>> in lua.
>> 
>> e_start = ??
>> context.setvalue(e_start .. name, "...")
>
> \starttext
>
> \startluacode
>
> local elements  = interfaces.complete.elements
> local interface = storage.shared.currentinterface
>
> local e_start = elements.start[currentinterface]
> local e_stop  = elements.stop [currentinterface]
>
> context.setvalue(e_start .. "something", "[[")
> context.setvalue(e_stop  .. "something", "]]")
>
> \stopluacode
>
> \startsomething Yes we can!\stopsomething
>
> \stoptext

Thank you.

Aditya
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___________________________________________________________________________________

Re: \e!start in lua

[Hans Hagen]

On 16-1-2011 5:28, Aditya Mahajan wrote:
> On Sun, 16 Jan 2011, Hans Hagen wrote:
>
>> On 15-1-2011 11:57, Aditya Mahajan wrote:
>>> What is the best way to define the equivalent of
>>>
>>> \setvalue{\e!start\NAME}{...}
>>>
>>> in lua.
>>>
>>> e_start = ??
>>> context.setvalue(e_start .. name, "...")
>>
>> \starttext
>>
>> \startluacode
>>
>> local elements = interfaces.complete.elements
>> local interface = storage.shared.currentinterface
>>
>> local e_start = elements.start[currentinterface]
>> local e_stop = elements.stop [currentinterface]
>>
>> context.setvalue(e_start .. "something", "[[")
>> context.setvalue(e_stop .. "something", "]]")
>>
>> \stopluacode
>>
>> \startsomething Yes we can!\stopsomething
>>
>> \stoptext
>
> Thank you.

start[currentinterface] => start[interface]

a next beta will have interfaces.elements

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: \e!start in lua

[Wolfgang Schuster]

Am 16.01.2011 um 17:27 schrieb Aditya Mahajan:

> This would just create \startfoo. \setvalue{\e!start foo} creates a interface specific command. The code that Hans posted does that. I am sorry that this was not clear in the question.

Ok, i missed the interface thing.

Wolfgang

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