Re: [Python-markdown-discuss] The WikiLinks Conundrum

[Waylan L. <wa...@gm...>]

On Fri, Sep 5, 2008 at 4:52 PM, Blake Winton <bw...@la...> wrote:
> Waylan Limberg wrote:
>> The problem is that CamelCase words that correctly appear in other
>> parts of the markup are mistakenly being identified as wikilinks.
>>
>> In the past this was not a problem because any markup in the labels
>> was ignored. Now that that bug is squished, I need a way to tell
>> markdown to not run the WikiLink pattern against the label. There are
>> currently two mechanisms to do that. One it to set each label as an
>> AtomicString. However, then we would again be back were we were with
>> nested markup being ignored in labels.
>
> Ooh, ooh!  SemiAtomicString?  ;)
>
>> The other solution is to reorder the InlinePatterns.
>
> I think that having patterns be order dependant isn't a great idea, in
> general.
>
> Could the WikiLink pattern be made more context-sensitive somehow,
> so that it wouldn't match if there it was inside a "Label"?
>
>> Interestingly, it
>> occurred to me that if InlinePattern was passed the parent element, we
>> could test ``parent_elem.tag != 'a'``, but even then, if that
>> CamelCase word is nested in strong or em tags, that test would fail.
>> Besides, I can't think of any other use for doing that.
>
> Well, if you could walk up your parents, you could check all of them for
> an 'a' (and check whether you were an attribute).  It seems like it
> might be worth defining a couple of custom walkers, to handle cases
> where we want to expand stuff, but only if it occurs in
> non-link/non-attribute places.
>
This was my initial thought as well. I guess I left out the fact that
ElementTree doesn't track parents of an Element - only children. Grrr.
Although, the project website does offer some sample code [1] that can
be used to walk the entire tree from root and generate a list of all
parents of an element. Seemed like an awful lot of extra work just to
check a parent - I'm sure we'd take a performance (and memory?) hit
with it.

[1]: http://effbot.org/zone/element.htm#accessing-parents

-- 
----
Waylan Limberg
wa...@gm...