Class: Packcr::Stream

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

Instance Method Summary collapse

Constructor Details

#initialize(io, name, line) ⇒ Stream

Returns a new instance of Stream.



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# File 'lib/packcr/stream.rb', line 6

def initialize(io, name, line)
  @io = io
  @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 93

def get_code_block(code, indent, fname)
  buf = StringIO.new
  line, io, @io, @line = @line, @io, buf, @line && :uuid
  write_code_block(code, indent, fname)
  return buf.string
ensure
  @line, @io = line, io
end

#write(s, rewrite_line_directive: false) ⇒ Object 



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# File 'lib/packcr/stream.rb', line 13

def write(s, rewrite_line_directive: false)
  if rewrite_line_directive && @line_directive_tag && @line.respond_to?(:+)
    s.gsub!(@line_directive_tag) { (@line + $`.count("\n") + 1).to_s }
    @line_directive_tag = nil
  end
  @io.write(s)
  if @line.respond_to?(:+)
    @line += s.count("\n")
  end
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
  len = code.len
  lineno = code.line
  if len == nil
    return # for safety
  end

  ptr.sub!(/\A\n+/) do
    lineno += $&.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 = $1
    char = $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}#{$1}"
    end
  end

  return if ptr.empty?

  write_line_directive(fname, lineno)
  ptr.scan(/^(.+?)[ \v\f\t\r]*$|^\r?\n/) do
    write $1 if $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 28

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 24

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