Class: Teapot::Substitutions::NestedSubstitution

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(keyword, open, close, indent = "\t") ⇒ NestedSubstitution

Returns a new instance of NestedSubstitution.



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# File 'lib/teapot/substitutions.rb', line 125

def initialize(keyword, open, close, indent = "\t")
  @keyword = keyword

  @open = open
  @close = close

  @indent = indent
end

Class Method Details

.apply(text, group) ⇒ Object 



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# File 'lib/teapot/substitutions.rb', line 197

def self.apply(text, group)
  group.each do |substitution|
    text = substitution.apply(text)
  end
  
  return text
end

Instance Method Details

#apply(text, level = 0) ⇒ Object 



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# File 'lib/teapot/substitutions.rb', line 169

def apply(text, level = 0)
  open_pattern = line_pattern
  close_pattern = line_pattern('/')

  lines = text.each_line
  output = StringIO.new

  indent = lambda do |level, indentation|
    while line = lines.next rescue nil
      if line =~ open_pattern
        write_open($1, $2, output, indentation)

        indent[level + @open.count, indentation.by(@open.count)]

        write_close($1, $2, output, indentation)
      elsif line =~ close_pattern
        break
      else
        output.write(indentation + line)
      end
    end
  end

  indent[0, Indentation.none]

  return output.string
end

#line_pattern(prefix = '') ⇒ Object 



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# File 'lib/teapot/substitutions.rb', line 134

def line_pattern(prefix = '')
  tag_pattern = Regexp.escape('<' + prefix + @keyword + '>')
  
  # Line matching pattern:
  Regexp.new('^(.*?)' + tag_pattern + '(.*)$', Regexp::MULTILINE | Regexp::EXTENDED)
end

#write_close(prefix, postfix, output, indentation) ⇒ Object 



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# File 'lib/teapot/substitutions.rb', line 155

def write_close(prefix, postfix, output, indentation)
  depth = @close.size
  indentation = indentation.with_prefix(prefix)

  #output.write(prefix)
  (0...depth).reverse_each do |i|
    chunk = @close[-1 - i]
    chunk.chomp! if i == 0
    
    output.write(indentation.by(i) << chunk)
  end
  output.write(postfix)
end

#write_open(prefix, postfix, output, indentation) ⇒ Object 



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# File 'lib/teapot/substitutions.rb', line 141

def write_open(prefix, postfix, output, indentation)
  depth = @open.size
  indentation = indentation.with_prefix(prefix)

  #output.write(prefix)
  (0...depth).each do |i|
    chunk = @open[i]
    chunk.chomp! if i == depth-1
    
    output.write(indentation.by(i) << chunk)
  end
  output.write(postfix)
end