Class: Haml2Erb::HamlParser

Inherits:
Object
  • Object
show all
Defined in:
lib/haml2erb/parser.rb

Constant Summary collapse

ParsingError = 
Class.new(StandardError)

Instance Method Summary collapse

Constructor Details

#initialize ⇒ HamlParser

Returns a new instance of HamlParser.



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# File 'lib/haml2erb/parser.rb', line 10

def initialize
  @lexer = Haml2Erb::HamlLexer.new
end

Instance Method Details

#parse(unprocessed, writer) ⇒ Object 



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# File 'lib/haml2erb/parser.rb', line 14

def parse(unprocessed, writer)
  @line_number = 0
  # process incoming text one line at a time
  unprocessed.each_line do |line|
    @line_number += 1
    next if line =~ /^\s*$/
    options = { }
    class << options
      include Haml2Erb::Mixins::CoMerging
    end
    @lexer.load_input(line)

    # handle indent
    if(@lexer.peek(Haml2Erb::Tokens::Indent))
      options.merge!(@lexer.pop(Haml2Erb::Tokens::Indent).options)
    end
    options.merge!(:indent => 0) unless options[:indent]

    # handle initial tag attributes
    while(@lexer.peek(Haml2Erb::Tokens::InitialAttribute))
      options.comerge!(@lexer.pop(Haml2Erb::Tokens::InitialAttribute).options)
    end
    options[:element_type] = :div if((options[:element_id] || options[:element_class]) && !options[:element_type])

    # handle interior element attributes
    if(@lexer.peek(Haml2Erb::Tokens::AttributesStart))
      @lexer.pop(Haml2Erb::Tokens::AttributesStart)
      options[:element_attributes] = { }
      while(!@lexer.peek(Haml2Erb::Tokens::AttributesEnd))
        if(@lexer.peek(Haml2Erb::Tokens::InnerAttributeQuoted))
          options[:element_attributes].merge!(@lexer.pop(Haml2Erb::Tokens::InnerAttributeQuoted).options[:element_attribute])
        elsif(@lexer.peek(Haml2Erb::Tokens::InnerAttributeRuby))
          options[:element_attributes].merge!(@lexer.pop(Haml2Erb::Tokens::InnerAttributeRuby).options[:element_attribute])
        elsif(@lexer.peek(Haml2Erb::Tokens::InnerAttributeNumber))
          options[:element_attributes].merge!(@lexer.pop(Haml2Erb::Tokens::InnerAttributeNumber).options[:element_attribute])
        else
          raise 'unrecognized inner attribute'
        end
      end
      @lexer.pop(Haml2Erb::Tokens::AttributesEnd)
    end

    if(@lexer.peek(Haml2Erb::Tokens::SelfClosingTag))
      @lexer.pop(Haml2Erb::Tokens::SelfClosingTag)
      options[:self_closing_tag] = true
    end
    
    # handle element contents
    if(@lexer.peek(Haml2Erb::Tokens::ContentsStart))
      options.merge!(@lexer.pop(Haml2Erb::Tokens::ContentsStart).options)
    end
    options[:content_type] = :text unless options[:content_type]

    if(@lexer.peek(Haml2Erb::Tokens::Contents))
      options.merge!(:contents => @lexer.pop(Haml2Erb::Tokens::Contents).matched)
    end

    writer << options
  end
rescue => error
  raise ParsingError, "Haml2Erb had trouble parsing line #{@line_number} with input #{@lexer.input.inspect} remaining: #{error.to_s}", error.backtrace
end