doc/forum/understanding_filter_hooks.mdwn



Hi All;
I'm trying to use a filter hook as part of making [[wikilinks|ikiwiki/wikilink]] work in [[plugins/contrib/tex4ht]].
It seems that filter is called for every page. For my application I just want it to be called for ".tex" files,
but right now I have to have a look at the content, which I don't like so much.
Is there a better hook to use for this? I need to transform the input before preprocessing.
[[DavidBremner]]

You can check the type of the page without having to look at the content of the page:

my $page_file=$pagesources{$page};
my $page_type=pagetype($page_file);


Then you can check whether $page_type is "tex".
--[[KathrynAndersen]]