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Contents
module PictureTag
module Instructions
# Handles HTML attributes, sourced from configuration and the liquid tag,
# sent to various elements.
# Stored as a hash, with string keys.
class HTMLAttributeSet
# Initialize with leftovers passed into the liquid tag. These leftovers
# (params) take the form of an array of strings, called words, which the
# tag parser has separated.
def initialize(params)
@attributes = load_preset
parse_params(params) if params
handle_source_url
end
def [](key)
@attributes[key]
end
private
def load_preset
# Shamelessly stolen from stackoverflow. Deep cloning a hash is
# surprisingly tricky! I could pull in ActiveSupport and get
# Hash#deep_dup, but for now I don't think it's necessary.
Marshal.load(Marshal.dump(PictureTag.preset['attributes'])) || {}
end
# Syntax this function processes:
# class="old way" --picture class="new way" --alt Here's my alt text
def parse_params(words)
key = 'implicit'
words.each do |word|
if word.match(/^--/)
key = word.delete_prefix('--')
elsif @attributes[key]
@attributes[key] << ' ' + word
else
@attributes[key] = word
end
end
end
def handle_source_url
return unless PictureTag.preset['link_source'] && self['link'].nil?
target = PictureTag.source_images.first.shortname
@attributes['link'] = ImgURI.new(target, source_image: true).to_s
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems