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# The tag node represents an html tag with a binding id in it. It provides an
# api to change attribute values.
require 'volt/page/targets/binding_document/base_node'
module Volt
class TagNode < BaseNode
# We use some of the same parts from the sandlebars parser, but since this
# has to ship to the client, we only take the parts we need.
START_TAG = /^<([-!\:A-Za-z0-9_]+)((?:\s+[\w\-]+(?:\s*=\s*(?:(?:"[^"]*")|(?:'[^']*')|[^>\s]+))?)*)\s*(\/?)>/
ATTRIBUTES = /([-\:A-Za-z0-9_]+)(?:\s*=\s*(?:(?:"((?:\\.|[^"])*)")|(?:'((?:\\.|[^'])*)')|([^>\s]+)))?/
attr_reader :tag_id
attr_reader :attributes
def initialize(html)
tag = html.scan(START_TAG).first
@start_tag = tag[0]
@attributes = tag[1].scan(ATTRIBUTES).map do |match|
name = match[0]
value = match[1] || match[2] || match[3]
# Store the tag's id for quick lookup
if name == 'id'
@tag_id = value
end
[name, value]
end.to_h
@end_tag = tag[2]
end
def to_html
attr_str = @attributes.map do |key, value|
"#{key}=\"#{value}\""
end.join(' ')
"<" + [@start_tag, attr_str, @end_tag].reject(&:blank?).join(' ') + ">"
end
end
end
Version data entries
6 entries across 6 versions & 1 rubygems