[Texmacs-dev] Re: New special env variable: path to self

[Lionel Elie Mamane]

On Thu, Oct 26, 2006 at 10:23:17AM +0200, Lionel Elie Mamane wrote:
> On Tue, Oct 24, 2006 at 02:40:35PM +0200, Lionel Elie Mamane wrote:

>>   
>> <assign|input|<macro|prompt|body|<coq-orig-input|<with|color|<if|<equal|<value|prog-language>|coq>|<extern|coq-prompt-colour>|<value|color>>|<arg|prompt>>|<arg|body>>>>

>> where coq-prompt-colour is a secure Scheme procedure that will return
>> the colour the thing should be in.

> The problem is that as far as I can determine, there is no way for
> that scheme procedure to know the position in the document of the node
> being typeset. I thus propose the following:

>   add an environmental variable "self" or "self-path" that evaluates
>   to the path of the <value> node that asks it value. That is
>   <value|self> would evaluate to (a suitable encoding) of the path to
>   the value node.

> Would you willing to take a patch for that?

Here's that patch. Documentation: <value|self-path> now evaluates to
an unspecified encoding of the path to the "value" node in the
document tree. The scheme function decode-self-path decodes that
encoding into a path like tree->path gives.

-- 
Lionel

texmacs_self-path.patch
Description: Text document