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Hpricot Altering

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i5m edited this page Sep 13, 2010 · 1 revision

(Part of An Hpricot Showcase.)

Altering Elements

When you alter Hpricot elements in a list, your changes will be reflected in
the document you started searching from.

doc = Hpricot("That's my <b>spoon</b>, Tyler.")
doc.at("b").swap("<i>fork</i>")
doc.to_html
# => "That's my <i>fork</i>, Tyler."

Using Builder-style methods (Hpricot 0.6 and up):

#!ruby
doc.at("i").swap { em "grapefruit spoon" }
doc.to_html
# => "That's my <em>grapefruit spoon</em>, Tyler."

Want to remove something?

# Remove all elements in this list from the document which contains them.
doc = Hpricot("<html>Remove this: <b>here</b></html>")
doc.search("b").remove
doc.to_html
# => "<html>Remove this: </html>"

Adding HTML after an element:

document.search('//a[@href]') do |link|
    href = URI(link.attributes['href']) rescue nil
    next unless href && href.host

    link.after '<span style="font-size:8px">[' + href.host + ']</span>'
end

Adding CDATA:

document.at('p').before do
  pre Hpricot::Tag::CData.new <<-'CDATA'
      <some>
          <example>
               <xml/>
          </example>
      </some>
    CDATA
  end
end

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