Class: Dev::UI::Formatter

Inherits:
Object
  • Object
show all
Defined in:
lib/dev/ui/formatter.rb

Defined Under Namespace

Classes: FormatError

Constant Summary collapse

SGR_MAP = 
{
  # presentational
  'red'       => '31',
  'green'     => '32',
  'yellow'    => '33',
  'blue'      => '34',
  'magenta'   => '35',
  'cyan'      => '36',
  'bold'      => '1',
  'italic'    => '3',
  'underline' => '4',
  'reset'     => '0',

  # semantic
  'error'   => '31', # red
  'success' => '32', # success
  'warning' => '33', # yellow
  'info'    => '34', # blue
  'command' => '36', # cyan
}.freeze
BEGIN_EXPR = 
'{{'
END_EXPR = 
'}}'
SCAN_FUNCNAME = 
/\w+:/
SCAN_GLYPH = 
/.}}/
SCAN_BODY = 
/
  .*?
  (
    #{BEGIN_EXPR} |
    #{END_EXPR}   |
    \z
  )
/mx
DISCARD_BRACES = 
0..-3
LITERAL_BRACES = 
:__literal_braces__

Instance Method Summary collapse

Constructor Details

#initialize(text) ⇒ Formatter

Returns a new instance of Formatter.



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# File 'lib/dev/ui/formatter.rb', line 58

def initialize(text)
  @text = text
end

Instance Method Details

#format(sgr_map = SGR_MAP, enable_color: true) ⇒ Object 



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# File 'lib/dev/ui/formatter.rb', line 62

def format(sgr_map = SGR_MAP, enable_color: true)
  @nodes = []
  stack = parse_body(StringScanner.new(@text))
  prev_fmt = nil
  content = @nodes.each_with_object(String.new) do |(text, fmt), str|
    if prev_fmt != fmt && enable_color
      text = apply_format(text, fmt, sgr_map)
    end
    str << text
    prev_fmt = fmt
  end

  stack.reject! { |e| e == LITERAL_BRACES }

  return content unless enable_color
  return content if stack == prev_fmt

  unless stack.empty? && (@nodes.size.zero? || @nodes.last[1].empty?)
    content << apply_format('', stack, sgr_map)
  end
  content
end