Class: HamdownCore::Parser

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

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/hamdown_core/parser.rb', line 14

def initialize(options = {})
  @filename = options[:filename]
end

Instance Method Details

#call(template_str) ⇒ Object 



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# File 'lib/hamdown_core/parser.rb', line 18

def call(template_str)
  @ast = Ast::Root.new
  @stack = []
  @line_parser = LineParser.new(@filename, template_str)
  @indent_tracker = IndentTracker.new(on_enter: method(:indent_enter), on_leave: method(:indent_leave))
  @filter_parser = FilterParser.new(@indent_tracker)

  while @line_parser.has_next?
    in_filter = !@ast.is_a?(Ast::HamlComment) && @filter_parser.enabled?
    line = @line_parser.next_line(in_filter: in_filter)
    if in_filter
      ast = @filter_parser.append(line)
      if ast
        @ast << ast
      end
    end
    unless @filter_parser.enabled?
      line_count = line.count("\n")
      line.delete!("\n")
      parse_line(line)
      line_count.times do
        @ast << create_node(Ast::Empty)
      end
    end
  end

  ast = @filter_parser.finish
  if ast
    @ast << ast
  end
  @indent_tracker.finish
  @ast
rescue Error => e
  if @filename && e.lineno
    e.backtrace.unshift "#{@filename}:#{e.lineno}"
  end
  raise e
end