Class: Packcr::Stream

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

Instance Method Summary collapse

Constructor Details

#initialize(stream, name, line) ⇒ Stream

Returns a new instance of Stream.



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# File 'lib/packcr/stream.rb', line 5

def initialize(stream, name, line)
  @stream = stream
  @name = name
  @line = line
  @line_directive_tag = nil
end

Instance Method Details

#get_code_block(code, indent, fname) ⇒ Object 



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# File 'lib/packcr/stream.rb', line 89

def get_code_block(code, indent, fname)
  buf = +""
  line = @line
  stream = @stream
  @stream = buf
  @line &&= :uuid
  write_code_block(code, indent, fname)
  buf
ensure
  @line = line
  @stream = stream
end

#write(s, rewrite_line_directive: false) ⇒ Object 



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# File 'lib/packcr/stream.rb', line 12

def write(s, rewrite_line_directive: false)
  if rewrite_line_directive && @line_directive_tag && @line.respond_to?(:+)
    s.gsub!(@line_directive_tag) { (@line + ::Regexp.last_match.pre_match.count("\n") + 1).to_s }
    @line_directive_tag = nil
  end
  @stream << s
  return unless @line.respond_to?(:+)

  @line += s.count("\n")
end

#write_code_block(code, indent, fname) ⇒ Object 



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# File 'lib/packcr/stream.rb', line 45

def write_code_block(code, indent, fname)
  text = code.text
  ptr = text.b
  lineno = code.line

  ptr.sub!(/\A\n+/) do
    lineno += ::Regexp.last_match(0).length
    ""
  end
  ptr.sub!(/[ \v\f\t\r\n]*\z/, "")

  min_indent_spaces = nil
  ptr.gsub!(/^([ \v\f\t]*)([^ \v\f\t\r\n])/) do
    spaces = ::Regexp.last_match(1)
    char = ::Regexp.last_match(2)

    next char if char == "#"

    Packcr.unify_indent_spaces(spaces)

    if !min_indent_spaces || min_indent_spaces.length > spaces.length
      min_indent_spaces = spaces
    end

    spaces + char
  end

  if min_indent_spaces
    indent_spaces = " " * indent
    ptr.gsub!(/^#{min_indent_spaces}( *[^\n#])/) do
      "#{indent_spaces}#{::Regexp.last_match(1)}"
    end
  end

  return if ptr.empty?

  write_line_directive(fname, lineno)
  ptr.scan(/^(.+?)[ \v\f\t\r]*$|^\r?\n/) do
    write ::Regexp.last_match(1) if ::Regexp.last_match(1)
    write "\n"
  end
  write_output_line_directive
end

#write_line_directive(fname, lineno) ⇒ Object 



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# File 'lib/packcr/stream.rb', line 27

def write_line_directive(fname, lineno)
  return unless @line

  if lineno.respond_to?(:+)
    write("#line #{lineno + 1} \"")
  else
    @line_directive_tag ||= "<#{SecureRandom.uuid}>"
    write("#line #{@line_directive_tag} \"")
  end

  write(Packcr.escape_string(fname))
  write("\"\n")
end

#write_output_line_directive ⇒ Object 



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# File 'lib/packcr/stream.rb', line 41

def write_output_line_directive
  write_line_directive(@name, @line)
end

#write_text(s) ⇒ Object 



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# File 'lib/packcr/stream.rb', line 23

def write_text(s)
  write s.gsub(/\r\n/, "\n")
end