Class: MicroMagick::IdentifyParser

Inherits:
Object
  • Object
show all
Defined in:
lib/micro_magick/identify_parser.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stdout) ⇒ IdentifyParser

Returns a new instance of IdentifyParser.



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# File 'lib/micro_magick/identify_parser.rb', line 6

def initialize(stdout)
  cleaned = stdout.encode('UTF-8', 'binary', :invalid => :replace, :undef => :replace, :replace => '')
  @lines = cleaned.split("\n").select { |ea| ea =~ /\S+:/ }
  if @lines.empty?
    @results = {}
  else
    @results = parse[:image] # < remove the "image" prefix.
    if (m = /(\d+)x(\d+)/.match(@results[:geometry]))
      @results[:width], @results[:height] = m[1].to_i, m[2].to_i
    end
  end
end

Instance Attribute Details

#results ⇒ Object (readonly)

Returns the value of attribute results.



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# File 'lib/micro_magick/identify_parser.rb', line 4

def results
  @results
end

Instance Method Details

#[](key) ⇒ Object 



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# File 'lib/micro_magick/identify_parser.rb', line 19

def [](key)
  results[key_to_sym(key)]
end

#indent(line) ⇒ Object 



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# File 'lib/micro_magick/identify_parser.rb', line 41

def indent(line)
  /\S/.match(line).begin(0)
end

#key_to_sym(key) ⇒ Object 



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# File 'lib/micro_magick/identify_parser.rb', line 50

def key_to_sym(key)
  key.is_a?(Symbol) ? key : key.strip.gsub(/[\b\W_-]+/, '_').downcase.to_sym
end

#parse ⇒ Object 



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# File 'lib/micro_magick/identify_parser.rb', line 23

def parse
  result = {}
  while true
    line = @lines.shift
    key, value = split(line)
    if @lines.first && indent(line) < indent(@lines.first)
      # The current line has a sub-section.
      result[key] = parse()
    else
      result[key] = value
    end

    # Next line is indented less than the current line:
    break if @lines.first.nil? || indent(line) > indent(@lines.first)
  end
  result
end

#split(line) ⇒ Object 



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# File 'lib/micro_magick/identify_parser.rb', line 45

def split(line)
  k, v = line.split(':', 2).map(&:strip)
  [key_to_sym(k), v]
end