Class: CSS::StyleSheet

Inherits:
CSS::SAC::DocumentHandler show all
Defined in:
lib/css/stylesheet/rule.rb,
lib/css/stylesheet/stylesheet.rb

Defined Under Namespace

Classes: Rule

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from CSS::SAC::DocumentHandler

#comment, #end_document, #end_font_face, #end_media, #end_page, #ignorable_at_rule, #import_style, #namespace_declaration, #start_document, #start_font_face, #start_media, #start_page

Constructor Details

#initialize(sac) ⇒ StyleSheet

Returns a new instance of StyleSheet.



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# File 'lib/css/stylesheet/stylesheet.rb', line 5

def initialize(sac)
  @sac   = sac
  @rules = []
  @current_rules = []
end

Instance Attribute Details

#rules ⇒ Object (readonly)

Returns the value of attribute rules.



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# File 'lib/css/stylesheet/stylesheet.rb', line 3

def rules
  @rules
end

Instance Method Details

#create_rule(rule) ⇒ Object 



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# File 'lib/css/stylesheet/stylesheet.rb', line 49

def create_rule(rule)
  Rule.new(@sac.parse_rule(rule).first)
end

#end_selector(selectors) ⇒ Object 



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# File 'lib/css/stylesheet/stylesheet.rb', line 17

def end_selector(selectors)
  @rules += @current_rules
  @current_rules = []
  reduce!
end

#find_all_rules_matching(hpricot_document) ⇒ Object

Find all rules used in hpricot_document



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# File 'lib/css/stylesheet/stylesheet.rb', line 30

def find_all_rules_matching(hpricot_document)
  used_rules = []
  hpricot_document.search('//').each do |node|
    if matching = (rules_matching(node))
      used_rules += matching
    end
  end
  used_rules.uniq
end

#find_rule(rule) ⇒ Object Also known as: [] 



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# File 'lib/css/stylesheet/stylesheet.rb', line 23

def find_rule(rule)
  rule = self.create_rule(rule) if rule.is_a?(String)
  rules.find { |x| x.selector == rule.selector }
end

#property(name, value, important) ⇒ Object 



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# File 'lib/css/stylesheet/stylesheet.rb', line 53

def property(name, value, important)
  @current_rules.each { |selector|
    selector.properties << [name, value, important]
  }
end

#rules_by_property ⇒ Object

Get a hash of rules by property



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# File 'lib/css/stylesheet/stylesheet.rb', line 60

def rules_by_property
  rules_by_property = Hash.new { |h,k| h[k] = [] }
  @rules.each { |sel|
    props = sel.properties.to_a.sort_by { |x| x.hash } # HACK?
    rules_by_property[props] << sel
  }
  rules_by_property
end

#rules_matching(node) ⇒ Object Also known as: =~

Find all rules that match node. node must quack like an Hpricot node.



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# File 'lib/css/stylesheet/stylesheet.rb', line 42

def rules_matching(node)
  rules.find_all { |rule|
    rule.selector =~ node
  }
end

#start_selector(selectors) ⇒ Object 



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# File 'lib/css/stylesheet/stylesheet.rb', line 11

def start_selector(selectors)
  selectors.each { |selector|
    @current_rules << Rule.new(selector)
  }
end

#to_css ⇒ Object 



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# File 'lib/css/stylesheet/stylesheet.rb', line 69

def to_css
  rules_by_property.map do |properties, rules|
    rules.map { |rule| rule.selector.to_css }.sort.join(', ') + " {\n" +
      properties.map { |key,value,important|
        # Super annoying.  If the property is font-family, its supposed to
        # be commas
        join_val = ('font-family' == key) ? ', ' : ' '
        values = [value].flatten.join(join_val)
        "#{key}:#{values}#{important ? ' !important' : ''};"
      }.join("\n") + "\n}"
  end.sort.join("\n")
end