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Contents
module HTML class Pipeline # This filter rewrites image tags with a max-width inline style and also wraps # the image in an <a> tag that causes the full size image to be opened in a # new tab. # # The max-width inline styles are especially useful in HTML email which # don't use a global stylesheets. class ImageMaxWidthFilter < Filter def call doc.search('img').each do |element| # Skip if there's already a style attribute. Not sure how this # would happen but we can reconsider it in the future. next if element['style'] # Bail out if src doesn't look like a valid http url. trying to avoid weird # js injection via javascript: urls. next if element['src'].to_s.strip =~ /\Ajavascript/i element['style'] = "max-width:100%;" if !has_ancestor?(element, %w(a)) link_image element end end doc end def link_image(element) link = doc.document.create_element('a', :href => element['src'], :target => '_blank') link.add_child(element.dup) element.replace(link) end end end end
Version data entries
42 entries across 42 versions & 3 rubygems