[Haskell-cafe] HXT: Replace an element with its text
si at fh-wedel.de
Tue Jun 26 16:39:17 CEST 2012
Michael Orlitzky wrote
> I would like to replace,
> <body><a href="#">foo</a></body>
> using HXT. So far, the closest I've come is to parse the HTML and apply
> the following stuff:
> is_link :: (ArrowXml a) => a XmlTree XmlTree
> is_link =
> hasName "a"
> replace_links_with_their_text :: (ArrowXml a) => a XmlTree XmlTree
> replace_links_with_their_text =
> processTopDown $ (getText >>> mkText) `when` is_link
processTopDown $ (deep getText >>> mkText) `when` is_link
should do it. The "deep getText" will find all Text nodes, independent
of the nesting of elements in the <a>...</a> element. If you then
write the result into a document every thing is fine.
One small problem can occur when the content of the <a> Element
has e.g. the form
The resulting DOM then still contains two text nodes, one for "foo"
and one for "bar". If you later search for a text "foobar"
you don't find a node. The melting of adjacent text nodes can
be done with
... (xshow (deep getText) >>> mkText) ...
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