Module: Muddle::Filter::BoilerplateCSS

Extended by:
Muddle::Filter
Defined in:
lib/muddle/filter/boilerplate_css.rb

Class Method Summary collapse

Methods included from Muddle::Filter

append_or_insert, find_or_append, find_or_prepend, prepend_or_insert

Class Method Details

.boilerplate_css ⇒ Object 



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# File 'lib/muddle/filter/boilerplate_css.rb', line 39

def self.boilerplate_css
  @boilerplate_css ||= File.read(File.join(File.dirname(__FILE__), '..', 'resources', 'boilerplate_inline.css'))
end

.filter(body_string) ⇒ Object

Boilerplate CSS Filter

Inserts a style tag containing the boilerplate CSS - we assume that this will later be filtered with the Premailer filter and inlined at that time.

If the body_string doesn’t look like an HTML file, we’ll build as much structure as makes sense in the context of a style tag (ie at least enclosing <html> and <head> tags)

The style tag will be inserted before any existing style tags so that any user-supplied CSS will over-write our boilerplate stuff



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# File 'lib/muddle/filter/boilerplate_css.rb', line 17

def self.filter(body_string)
  doc = Hpricot(body_string)

  insert_styles_to_inline(doc)

  doc.to_html
end

.insert_styles_to_inline(doc) ⇒ Object 



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# File 'lib/muddle/filter/boilerplate_css.rb', line 25

def self.insert_styles_to_inline(doc)
  find_or_append(doc, 'html', :with => '<html></html>') do |html|
    find_or_prepend(html.first, 'head', :with => '<head></head>') do |head|
      if node = head.search('style:first-of-type()').first
        node.before('<style type="text/css"></style>')
      else
        prepend_or_insert(head.first, '<style type="text/css"></style>')
      end
      
      head.search('style:first-of-type()').inner_html(boilerplate_css)
    end
  end
end