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On 04/13/2012 04:31 AM, Christian Roth wrote:
that's why I did not give an example in the first place :-) A simpler
example, unfortunately, would not be "covering the various
possibilities".
As for the basic requirement, I tried to describe it with: "Keeping a
global variable's value current while doing a depth-first traversal
of a document, where the variable's value is not scoped by either the
document's element hierarchy, nor the nesting of XSLT template
calls."
I'll try in a different way: Imagine someone has laid a rope along
the path of a depth-first traversal of the document tree. The initial
color of the rope is red. However, any node in the tree may decide to
change its color (e.g. to green), which the rope then has from the
start of that node on for all later (=following::) ones until we
reach the document end, or up to the next node that chooses to change
the rope's color again. All nodes along the path can query the rope's
color (that's the parameter I need to 'tunnel' through the document
in document order) it has when it reaches them.
Which new color a node changes the rope's color to depends on its
context and(!) the current color of the rope it has when it reaches
it.
This sounds very similar to the problem I was trying to solve last week;
I ended up just implementing a manual traversal of the nodes, keeping
some state around. Not a very XSLTish solution, but it was the best I
could come up with. Check the archives.
~Chris
- --
Chris Maden, text nerd <URL: http://crism.maden.org/ >
“Be wary of great leaders. Hope that there are many, many small
leaders.” — Pete Seeger
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