69 lines
2.3 KiB
Ruby
Executable File
69 lines
2.3 KiB
Ruby
Executable File
module Blueprint
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# Strips out most whitespace and can return a hash or string of parsed data
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class CSSParser
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attr_accessor :namespace
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attr_reader :css_output, :raw_data
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# ==== Options
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# * <tt>css_string</tt> String of CSS data
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# * <tt>options</tt>
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# * <tt>:namespace</tt> -- Namespace to use when generating output
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def initialize(css_string = "", options = {})
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@raw_data = css_string
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@namespace = options[:namespace] || ""
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compress(@raw_data)
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end
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# returns string of CSS which can be saved to a file or otherwise
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def to_s
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@css_output
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end
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# returns a hash of all CSS data passed
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#
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# ==== Options
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# * <tt>data</tt> -- CSS string; defaults to string passed into the constructor
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def parse(data = nil)
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data ||= @raw_data
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# wrapper array holding hashes of css tags/rules
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css_out = []
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# clear initial spaces
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data.strip_side_space!.strip_space!
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# split on end of assignments
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data.split('}').each_with_index do |assignments, index|
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# split again to separate tags from rules
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tags, styles = assignments.split('{').map{|a| a.strip_side_space!}
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unless styles.blank?
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# clean up tags and apply namespaces as needed
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tags.strip_selector_space!
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tags.gsub!(/\./, ".#{namespace}") unless namespace.blank?
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# split on semicolon to iterate through each rule
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rules = []
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styles.split(';').each do |key_val_pair|
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unless key_val_pair.nil?
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# split by property/val and append to rules array with correct declaration
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property, value = key_val_pair.split(':').map{|kv| kv.strip_side_space!}
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break unless property && value
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rules << "#{property}:#{value};"
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end
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end
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# now keeps track of index as hashes don't keep track of position (which will be fixed in Ruby 1.9)
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css_out << {:tags => tags, :rules => rules.to_s, :idx => index} unless tags.blank? || rules.to_s.blank?
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end
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end
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css_out
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end
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private
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def compress(data)
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@css_output = ""
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parse(data).flatten.sort_by {|i| i[:idx]}.each do |line|
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@css_output += "#{line[:tags]} {#{line[:rules]}}\n"
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end
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end
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end
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end |