Class: HtmlToHaml::Html::DefaultConversionUseCase

Inherits:
Object
  • Object
show all
Includes:
HtmlToHaml::HamlWhitespaceCleaner
Defined in:
lib/html_to_haml/use_cases/html/default_conversion_use_case.rb

Constant Summary collapse

HAML_SYMBOL_REGEX = 
">\s*(\/|-|=)"
ERB_LINE_REGEX = 
"\n\s*(-|=).*$"
CLOSING_HTML_REGEX = 
"<\/.*?>"
DOCTYPE_REGEX = 
"<!DOCTYPE.*?>"
SELF_CLOSING_HTML_REGEX =

For self-closing html tags that aren’t self-closing by default

"\/>"
SELF_CLOSING_TAGS = 
%w(area base br col command embed hr img input keygen link meta param source track wbr)

Instance Method Summary collapse

Constructor Details

#initialize(html, remove_whitespace: true) ⇒ DefaultConversionUseCase 



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# File 'lib/html_to_haml/use_cases/html/default_conversion_use_case.rb', line 17

def initialize(html, remove_whitespace: true)
  # Since Haml uses whitespace in a way html doesn't, this starts by stripping
  # whitespace to start the next gsub with a clean slate. Unless the caller opts
  # out.
  @html = if remove_whitespace
            remove_html_whitespace(html: html)
          else
            html
          end
end

Instance Method Details

#convert ⇒ Object 



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# File 'lib/html_to_haml/use_cases/html/default_conversion_use_case.rb', line 28

def convert
  indentation_tracker = IndentationTracker.new(indentation_amount: HtmlToHaml::INDENTATION_AMOUNT)
  haml = @html.gsub(/#{DOCTYPE_REGEX}|#{ERB_LINE_REGEX}|#{CLOSING_HTML_REGEX}|#{SELF_CLOSING_HTML_REGEX}|#{self_closing_tag_regex}|#{HAML_SYMBOL_REGEX}|<|>|\n/) do |matched_elem|
    adjust_indentation_level(html: matched_elem, indentation_tracker: indentation_tracker)
    start_of_line = "\n#{indentation_tracker.indentation}"
    case matched_elem
      when /#{DOCTYPE_REGEX}/
        "#{matched_elem}\n"
      when /#{ERB_LINE_REGEX}/
        "#{start_of_line}#{matched_elem[1..-1]}"
      when /#{self_closing_tag_regex}/
        "#{start_of_line}%#{matched_elem[1..-1]}"
      when /#{HAML_SYMBOL_REGEX}/
        "#{start_of_line}#{matched_elem[1..-1].insert(-2, "\\")}"
      when "<"
        "#{start_of_line}%"
      else
        start_of_line
    end
  end
  remove_haml_whitespace(haml: haml)
end

#self_closing_tag_regex ⇒ Object 



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# File 'lib/html_to_haml/use_cases/html/default_conversion_use_case.rb', line 51

def self_closing_tag_regex
  "<#{SELF_CLOSING_TAGS.join('|<')}\\s"
end