Class: Kode::Indenter

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

Constant Summary collapse

INDENT_EXP =

indent regexp

[
  /^def\b/,
  /^if\b/,
  /^else\b/,
  /^elsif\b/,
  /\bdo\b/,
  /^class\b/,
  /^module\b/,
  /(=\s*|^)until\b/,
  /(=\s*|^)for\b/,
  /^unless\b/,
  /(=\s*|^)while\b/,
  /(=\s*|^)begin\b/,
  /(^| )case\b/,
  /\bthen\b/,
  /^rescue\b/,
  /^ensure\b/,
  /\bwhen\b/,
  /\{[^\}]*$/,
  /\[[^\]]*$/
]
OUTDENT_EXP =

outdent regexp

[
  /^end\b/,
  /^else\b/,
  /^elsif\b/,
  /^rescue\b/,
  /^ensure\b/,
  /\bwhen\b/,
  /^[^\{]*\}/,
  /^[^\[]*\]/
]

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(params = {}) ⇒ Indenter

Creates cleaner. Takes hash of parametrs:

:indent_char - indent symbol (default: space)

:indent_size - quantity of indent symbols for single step (default: 2)



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# File 'lib/kode.rb', line 69

def initialize(params = {})
  @indent_char = params[:indent_char] || " "
  @indent_size = params[:indent_size] || 2
end

Class Method Details

.process(params = {}) ⇒ Object

Cleaning source. Takes hash of parametrs:

:file - Source code as path to file

:text - Source code as ruby string

:backup - makes backup copy if true

:indent_char - indent symbol (default: “ ”)

:indent_size - quantity of indent symbols for single step



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# File 'lib/kode.rb', line 87

def self.process(params = {})
  unless params[:file].nil?
    params[:text] = File.read(params[:file])
    @path = params[:file]
  end

  output = self.new(params).process(params[:text])

  if params[:backup] && (source != dest) && params[:file]
    File.open(params[:file] + ".ugly~","w") { |f| f.write(params[:text]) }
    File.open(params[:file],"w") { |f| f.write(output) }
  else
    return output
  end

end

Instance Method Details

#process(source) ⇒ Object

Cleaning source. Takes source code as ruby string.



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# File 'lib/kode.rb', line 107

def process(source)

  cursor_inside_comment_block = false
  cursor_at_program_end       = false

  multiline_array  = []
  multiline_string = ""

  indent_level  = 0
  dest          = ""

  source.each_line do |line|

    unless cursor_at_program_end

      # detect program end mark
      if line =~ /^__END__$/
        cursor_at_program_end = true
      else

        # combine continuing lines
        if(!(line =~ /^\s*#/) && line =~ /[^\\]\\\s*$/)
          multiline_array.push line
          multiline_string += line.sub(/^(.*)\\\s*$/,"\\1")
          next
        end

        # add final line
        if (multiline_string.length > 0)
          multiline_array.push line
          multiline_string += line.sub(/^(.*)\\\s*$/,"\\1")
        end

        tline = ((multiline_string.length > 0) ? multiline_string : line).strip

        cursor_inside_comment_block = true if tline.match(/^=begin/)
      end
    end

    if (cursor_inside_comment_block or cursor_at_program_end)
      dest += line # add the line unchanged
    else

      cursor_at_comment_line = (tline =~ /^#/)

      unless cursor_at_comment_line
        # throw out sequences that will
        # only sow confusion
        # XXX WTF?
        while tline.gsub!(/\{[^\{]*?\}/,"")
        end
        while tline.gsub!(/\[[^\[]*?\]/,"")
        end
        while tline.gsub!(/'.*?'/,"")
        end
        while tline.gsub!(/".*?"/,"")
        end
        while tline.gsub!(/\`.*?\`/,"")
        end
        while tline.gsub!(/\([^\(]*?\)/,"")
        end
        while tline.gsub!(/\/.*?\//,"")
        end
        while tline.gsub!(/%r(.).*?\1/,"")
        end

        # delete end-of-line comments
        tline.sub!(/#[^\"]+$/,"")
        # convert quotes
        # WTF?
        tline.gsub!(/\\\"/,"'")
        OUTDENT_EXP.each do |re|
          if (tline =~ re)
            indent_level -= 1
            break
          end
        end
      end

      unless multiline_array.empty?
        multiline_array.each do |ml|
          dest += add_line(ml,indent_level)
        end
        multiline_array.clear
        multiline_string = ""
      else
        dest += add_line(line,indent_level)
      end

      unless cursor_at_comment_line
        INDENT_EXP.each do |re|
          if(tline =~ re && !(tline =~ /\s+end\s*$/))
            indent_level += 1
            break
          end
        end
      end

    end

    cursor_inside_comment_block = false if tline =~ /^=end/
  end


  if (indent_level != 0)
    STDERR.puts "#{@path}: Indentation error: #{indent_level}" if @path
  end

  return dest
end