class HTML::Pipeline::ImageMaxWidthFilter
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.
Public Instance Methods
call()
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# File lib/html/pipeline/image_max_width_filter.rb, line 10 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%;' link_image element unless has_ancestor?(element, %w[a]) end doc end
link_image(element)
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# File lib/html/pipeline/image_max_width_filter.rb, line 28 def link_image(element) link = doc.document.create_element('a', href: element['src'], target: '_blank') link.add_child(element.dup) element.replace(link) end