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# frozen_string_literal: true
module Roadie
# Domain object that represents a stylesheet (from disc, perhaps).
#
# It has a name and a list of {StyleBlock}s.
#
# @attr_reader [String] name the name of the stylesheet ("stylesheets/main.css", "Admin user styles", etc.). The name of the stylesheet will be visible if any errors occur.
# @attr_reader [Array<StyleBlock>] blocks
class Stylesheet
BOM = (+"\xEF\xBB\xBF").force_encoding("UTF-8").freeze
attr_reader :name, :blocks
# Parses the CSS string into a {StyleBlock}s and stores it.
#
# @param [String] name
# @param [String] css
def initialize(name, css)
@name = name
@blocks = parse_blocks(css.sub(BOM, ""))
end
def to_s
blocks.join("\n")
end
private
def inlinable_blocks
blocks.select(&:inlinable?)
end
def parse_blocks(css)
blocks = []
parser = setup_parser(css)
parser.each_rule_set do |rule_set, media_types|
rule_set.selectors.each do |selector_string|
blocks << create_style_block(selector_string, rule_set, media_types)
end
end
blocks
end
def create_style_block(selector_string, rule_set, media_types)
specificity = CssParser.calculate_specificity(selector_string)
selector = Selector.new(selector_string, specificity)
properties = []
rule_set.each_declaration do |prop, val, important|
properties << StyleProperty.new(prop, val, important, specificity)
end
StyleBlock.new(selector, properties, media_types)
end
def setup_parser(css)
parser = CssParser::Parser.new
# CssParser::Parser#add_block! mutates input parameter
parser.add_block! css.dup
parser
end
end
end
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