Class: Blueprint::CSSParser

Inherits:
Object
  • Object
show all
Defined in:
lib/template/css/blueprint/lib/blueprint/css_parser.rb

Overview

Strips out most whitespace and can return a hash or string of parsed data

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(css_string = "", options = {}) ⇒ CSSParser

Options

  • css_string String of CSS data

  • options

    • :namespace – Namespace to use when generating output



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# File 'lib/template/css/blueprint/lib/blueprint/css_parser.rb', line 11

def initialize(css_string = "", options = {})
  @raw_data     = css_string
  @namespace    = options[:namespace] || ""
  compress(@raw_data)
end

Instance Attribute Details

#css_output ⇒ Object (readonly)

Returns the value of attribute css_output.



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# File 'lib/template/css/blueprint/lib/blueprint/css_parser.rb', line 5

def css_output
  @css_output
end

#namespace ⇒ Object

Returns the value of attribute namespace.



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# File 'lib/template/css/blueprint/lib/blueprint/css_parser.rb', line 4

def namespace
  @namespace
end

#raw_data ⇒ Object (readonly)

Returns the value of attribute raw_data.



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# File 'lib/template/css/blueprint/lib/blueprint/css_parser.rb', line 5

def raw_data
  @raw_data
end

Instance Method Details

#parse(data = nil) ⇒ Object

returns a hash of all CSS data passed

Options

  • data – CSS string; defaults to string passed into the constructor



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# File 'lib/template/css/blueprint/lib/blueprint/css_parser.rb', line 26

def parse(data = nil)
  data ||= @raw_data

  # wrapper array holding hashes of css tags/rules
  css_out = []
  # clear initial spaces
  data.strip_side_space!.strip_space!

  # split on end of assignments
  data.split('}').each_with_index do |assignments, index|
    # split again to separate tags from rules
    tags, styles = assignments.split('{').map{|a| a.strip_side_space!}
    unless styles.blank?
      # clean up tags and apply namespaces as needed
      tags.strip_selector_space!
      tags.gsub!(/\./, ".#{namespace}") unless namespace.blank?

      # split on semicolon to iterate through each rule
      rules = []
      styles.split(";").each do |key_val_pair|
        unless key_val_pair.nil?
          # split by property/val and append to rules array with correct declaration
          property, value = key_val_pair.split(":", 2).map {|kv| kv.strip_side_space! }
          break unless property && value
          rules << "#{property}:#{value};"
        end
      end
      # now keeps track of index as hashes don't keep track of position
      # (which will be fixed in Ruby 1.9)
      unless tags.blank? || rules.to_s.blank?
        css_out << {:tags => tags, :rules => rules.join, :idx => index}
      end
    end
  end
  css_out
end

#to_s ⇒ Object

returns string of CSS which can be saved to a file or otherwise



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# File 'lib/template/css/blueprint/lib/blueprint/css_parser.rb', line 18

def to_s
  @css_output
end