Module: Spreadsheetkit::StyleParser

Included in:
Base
Defined in:
lib/spreadsheetkit/style_parser.rb

Instance Method Summary collapse

Instance Method Details

#absolutize_image_sources(document) ⇒ Object 



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# File 'lib/spreadsheetkit/style_parser.rb', line 63

def absolutize_image_sources(document)
  document.css('img').each do |img|
    src = img['src']
    img['src'] = src.gsub(src, absolutize_url(src))
  end

  document
end

#absolutize_url(url, base_path = '') ⇒ Object

Absolutize URL (Absolutize? Seriously?)



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# File 'lib/spreadsheetkit/style_parser.rb', line 73

def absolutize_url(url, base_path = '')
  ############# Refactor
  # original_url = url
  #unless original_url[URI::regexp(%w[http https])]
  #  protocol = default_url_options[:protocol]
  #  protocol = "http://" if protocol.blank?
  #  protocol+= "://" unless protocol.include?("://")

  #  host = default_url_options[:host]

  #  [host,protocol].each{|r| original_url.gsub!(r,"") }
  #  host = protocol+host unless host[URI::regexp(%w[http https])]

  #  url = URI.join host, base_path, original_url
  #end

  #url.to_s
  
  url
end

#css_parser(html) ⇒ Object 



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# File 'lib/spreadsheetkit/style_parser.rb', line 52

def css_parser(html)
  parser = CssParser::Parser.new
  
  html.xpath("//head/link[@type='text/css']" ).each do |style|
    parser.load_uri! "#{Rails.root}/public#{style[:href]}"
  end
  
  parser
end

#parse_html(html) ⇒ Object 



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# File 'lib/spreadsheetkit/style_parser.rb', line 7

def parse_html(html)
  # Parse original html
  html_document = absolutize_image_sources(html)

  # Write inline styles
  element_styles = {}
  
  css_parser(html_document).each_selector do |selector, declaration, specificity|
    next if selector.include?(':')
    html_document.css(selector).each do |element|
      declaration.to_s.split(';').each do |style|
        # Split style in attribute and value
        attribute, value = style.split(':').map(&:strip)

        # Set element style defaults
        element_styles[element] ||= {}
        element_styles[element][attribute] ||= { :specificity => 0, :value => '' }

        # Update attribute value if specificity is higher than previous values
        if element_styles[element][attribute][:specificity] <= specificity
          element_styles[element][attribute] = { :specificity => specificity, :value => value }
        end
      end
    end
  end

  # Loop through element styles
  element_styles.each_pair do |element, attributes|
    # Elements current styles
    current_style = element['style'].to_s.split(';').sort

    # Elements new styles
    new_style = attributes.map{|attribute, style| "#{attribute}: #{update_image_urls(style[:value])}"}

    # Concat styles
    style = (current_style + new_style).compact.uniq.map(&:strip).sort

    # Set new styles
    element['style'] = style.join(';')
  end

  # Return HTML
  html_document
end

#update_image_urls(style) ⇒ Object

Update image urls



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# File 'lib/spreadsheetkit/style_parser.rb', line 95

def update_image_urls(style)
  ############# Refactor
  #if default_url_options[:host].present?
    # Replace urls in stylesheets
  #  style.gsub!($1, absolutize_url($1, 'stylesheets')) if style[/url\(['"]?(.*?)['"]?\)/i]
  #end

  style
end