photomix/resources/DummyHTML/css/joshuaclayton-blueprint-css-05312a805eca539ab85e435cfd94bdedfd12ab2e/lib/blueprint/semantic_class_names.rb

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2009-06-09 21:38:32 +02:00
module Blueprint
# parses a hash of key/value pairs, key being output CSS selectors, value being a list of CSS selectors to draw from
class SemanticClassNames
attr_accessor :class_assignments
attr_reader :namespace, :source_file
# ==== Options
# * <tt>options</tt>
# * <tt>:namespace</tt> -- Namespace to be used when matching CSS selectors to draw from
# * <tt>:source_file</tt> -- Source file to use as reference of CSS selectors. Defaults to Blueprint's generated screen.css
# * <tt>:class_assignments</tt> -- Hash of key/value pairs, key being output CSS selectors, value being a list of CSS selectors to draw from
def initialize(options = {})
@namespace = options[:namespace] || ""
@source_file = options[:source_file] || File.join(Blueprint::BLUEPRINT_ROOT_PATH, 'screen.css')
self.class_assignments = options[:class_assignments] || {}
end
# Returns a CSS string of semantic selectors and associated styles
# ==== Options
# * <tt>assignments</tt> -- Hash of key/value pairs, key being output CSS selectors, value being a list of CSS selectors to draw from; defaults to what was passed in constructor or empty hash
def css_from_assignments(assignments = {})
assignments ||= self.class_assignments
# define a wrapper hash to hold all the new CSS assignments
output_css = {}
#loads full stylesheet into an array of hashes
blueprint_assignments = CSSParser.new(File.path_to_string(self.source_file)).parse
# iterates through each class assignment ('#footer' => '.span-24 div.span-24', '#header' => '.span-24 div.span-24')
assignments.each do |semantic_class, blueprint_classes|
# gathers all BP classes we're going to be mimicing
blueprint_classes = blueprint_classes.split(/,|\s/).find_all {|c| !c.blank? }.flatten.map {|c| c.strip }
classes = []
# loop through each BP class, grabbing the full hash (containing tags, index, and CSS rules)
blueprint_classes.each do |bp_class|
match = bp_class.include?('.') ? bp_class.gsub(".", ".#{self.namespace}") : ".#{self.namespace}#{bp_class}"
classes << blueprint_assignments.find_all {|line| line[:tags] =~ Regexp.new(/^([\w\.\-\:]+, ?)*#{match}(, ?[\w\.\-\:]+)*$/) }.uniq
end
# clean up the array
classes = classes.flatten.uniq
# set the semantic class to the rules gathered in classes, sorted by index
# this way, the styles will be applied in the correct order from top of file to bottom
output_css[semantic_class] = "#{classes.sort_by {|i| i[:idx]}.map {|i| i[:rules]}}"
end
# return the css in proper format
css = ""
output_css.each do |tags, rules|
css += "#{tags} {#{rules}}\n"
end
css
end
end
end