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Versions: 13
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Contents
# frozen_string_literal: true
class HTMLPipeline
class NodeFilter
# 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 < NodeFilter
SELECTOR = Selma::Selector.new(match_element: "img")
def selector
SELECTOR
end
def handle_element(element)
# Skip if there's already a style attribute. Not sure how this
# would happen but we can reconsider it in the future.
return if element["style"]
# Bail out if src doesn't look like a valid http url. trying to avoid weird
# js injection via javascript: urls.
return if /\Ajavascript/i.match?(element["src"].to_s.strip)
element["style"] = "max-width:100%;"
link_image(element) unless has_ancestor?(element, "a")
end
def link_image(element)
link_start = %(<a target="_blank" href="#{element["src"]}">)
element.before(link_start, as: :html)
link_end = "</a>"
element.after(link_end, as: :html)
end
end
end
end
Version data entries
13 entries across 13 versions & 1 rubygems