Class: Haml2Handlebars::Engine

Inherits:
Haml::Engine
  • Object
show all
Defined in:
lib/haml2handlebars/engine.rb

Instance Method Summary collapse

Instance Method Details

#compile_haml_comment ⇒ Object 



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# File 'lib/haml2handlebars/engine.rb', line 88

def compile_haml_comment
  text = @node.value[:text]
  return if text.empty?

  push_script(text,
    :preserve_script => @node.value[:preserve],
    :escape_html => @node.value[:escape_html],
    :silent => true, :comment => true)
end

#compile_silent_script ⇒ Object 



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# File 'lib/haml2handlebars/engine.rb', line 98

def compile_silent_script
  return if @options[:suppress_eval]
  keyword = @node.value[:keyword]
  @output_tabs -= 1 if Haml::Parser::MID_BLOCK_KEYWORDS.include?(keyword)

  push_silent(@node.value[:text], false, :block_given => block_given?)
  ruby_block = block_given? && !keyword


  if block_given?
    # Store these values because for conditional statements,
    # we want to restore them for each branch
    @node.value[:dont_indent_next_line] = @dont_indent_next_line
    @node.value[:dont_tab_up_next_text] = @dont_tab_up_next_text

    @output_tabs += 1
    yield
    @output_tabs -= 1

    push_silent("/#{@node.value[:keyword]}", :can_suppress) unless @node.value[:dont_push_end]
  elsif keyword == "end"
    if @node.parent.children.last.equal?(@node)
      # Since this "end" is ending the block,
      # we don't need to generate an additional one
      @node.parent.value[:dont_push_end] = true
    end
    # Don't restore dont_* for end because it isn't a conditional branch.
  elsif Haml::Parser::MID_BLOCK_KEYWORDS.include?(keyword)
    @output_tabs += 1

    # Restore dont_* for this conditional branch
    @dont_indent_next_line = @node.parent.value[:dont_indent_next_line]
    @dont_tab_up_next_text = @node.parent.value[:dont_tab_up_next_text]
  end
end

#compile_tag ⇒ Object 



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# File 'lib/haml2handlebars/engine.rb', line 210

def compile_tag
  t = @node.value

  # Get rid of whitespace outside of the tag if we need to
  rstrip_buffer! if t[:nuke_outer_whitespace]

  dont_indent_next_line =
    (t[:nuke_outer_whitespace] && !block_given?) ||
    (t[:nuke_inner_whitespace] && block_given?)

  if @options[:suppress_eval]
    object_ref = "nil"
    parse = false
    value = t[:parse] ? nil : t[:value]
    attributes_hashes = {}
    preserve_script = false
  else
    object_ref = t[:object_ref]
    parse = t[:parse]
    value = t[:value]
    attributes_hashes = t[:attributes_hashes]
    preserve_script = t[:preserve_script]
  end

  # Check if we can render the tag directly to text and not process it in the buffer
  if object_ref == "nil" && attributes_hashes.empty? && !preserve_script
    tag_closed = !block_given? && !t[:self_closing] && !parse

    open_tag = prerender_tag(t[:name], t[:self_closing], t[:attributes])
    if tag_closed
      open_tag << "#{value}</#{t[:name]}>"
      open_tag << "\n" unless t[:nuke_outer_whitespace]
    elsif !(parse || t[:nuke_inner_whitespace] ||
        (t[:self_closing] && t[:nuke_outer_whitespace]))
      open_tag << "\n"
    end

    push_merged_text(open_tag,
      tag_closed || t[:self_closing] || t[:nuke_inner_whitespace] ? 0 : 1,
      !t[:nuke_outer_whitespace])

    @dont_indent_next_line = dont_indent_next_line
    return if tag_closed
  else
    if attributes_hashes.empty?
      attributes_hashes = ''
    elsif attributes_hashes.size == 1
      attributes_hashes = ", #{attributes_hashes.first}"
    else
      attributes_hashes = ", (#{attributes_hashes.join(").merge(")})"
    end
    attributes_hashes.gsub! ",}", "}"

    push_merged_text "<#{t[:name]}", 0, !t[:nuke_outer_whitespace]

    # WAS:
    # push_generated_script(
    #   "_hamlout.attributes(#{inspect_obj(t[:attributes])}, #{object_ref}#{attributes_hashes})")
    # NOW: attempt a simplistic parse of the attributes
    concat_merged_text AttributesParser.hash_to_html(t[:attributes])+
                       AttributesParser.new(attributes_hashes).to_html

    concat_merged_text(
      if t[:self_closing] && xhtml?
        " />" + (t[:nuke_outer_whitespace] ? "" : "\n")
      else
        ">" + ((if t[:self_closing] && html?
                  t[:nuke_outer_whitespace]
                else
                  !block_given? || t[:preserve_tag] || t[:nuke_inner_whitespace]
                end) ? "" : "\n")
      end)

    if value && !parse
      concat_merged_text("#{value}</#{t[:name]}>#{t[:nuke_outer_whitespace] ? "" : "\n"}")
    else
      @to_merge << [:text, '', 1] unless t[:nuke_inner_whitespace]
    end

    @dont_indent_next_line = dont_indent_next_line
  end

  return if t[:self_closing]

  if value.nil?
    @output_tabs += 1 unless t[:nuke_inner_whitespace]
    yield if block_given?
    @output_tabs -= 1 unless t[:nuke_inner_whitespace]
    rstrip_buffer! if t[:nuke_inner_whitespace]
    push_merged_text("</#{t[:name]}>" + (t[:nuke_outer_whitespace] ? "" : "\n"),
      t[:nuke_inner_whitespace] ? 0 : -1, !t[:nuke_inner_whitespace])
    @dont_indent_next_line = t[:nuke_outer_whitespace]
    return
  end

  if parse
    push_script(value, t.merge(:in_tag => true))
    concat_merged_text("</#{t[:name]}>" + (t[:nuke_outer_whitespace] ? "" : "\n"))
  end
end

#push_script(text, opts = {}) ⇒ Object 



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# File 'lib/haml2handlebars/engine.rb', line 134

def push_script text, opts={}
  tag_lead = opts[:block_given] ? "#" : ""
  handlebars_tag = "{{#{tag_lead}#{text.strip}}}"

  # USED TO START HERE:
  return if options[:suppress_eval]

  args = %w[preserve_script in_tag preserve_tag escape_html nuke_inner_whitespace]
  args.map! {|name| opts[name.to_sym]}
  args << !block_given? << @options[:ugly]

  no_format = @options[:ugly] &&
    !(opts[:preserve_script] || opts[:preserve_tag] || opts[:escape_html])
  output_expr = "(#{text}\n)"
  static_method = "_hamlout.#{static_method_name(:format_script, *args)}"

  # Prerender tabulation unless we're in a tag
  push_merged_text '' unless opts[:in_tag]

  unless block_given?
    # WAS: push_generated_script(no_format ? "#{text}\n" : "#{static_method}(#{output_expr});")
    push_generated_script(handlebars_tag.inspect)

    concat_merged_text("\n") unless opts[:in_tag] || opts[:nuke_inner_whitespace]

    # push_generated_script(handlebars_tag.inspect)
    # 
    # concat_merged_text("\n") unless opts[:in_tag] || opts[:nuke_inner_whitespace]

    # @output_tabs += 1
    return
  end

  flush_merged_text
  push_generated_script handlebars_tag.inspect
  concat_merged_text("\n") unless opts[:in_tag] || opts[:nuke_inner_whitespace]
  
  # push_silent text

  @output_tabs += 1 unless opts[:nuke_inner_whitespace]
  yield
  @output_tabs -= 1 unless opts[:nuke_inner_whitespace]

  push_silent('end', :can_suppress) unless @node.value[:dont_push_end]
  # COMMENTED: @precompiled << "_hamlout.buffer << #{no_format ? "haml_temp.to_s;" : "#{static_method}(haml_temp);"}"
  concat_merged_text("\n") unless opts[:in_tag] || opts[:nuke_inner_whitespace] || @options[:ugly]
end

#push_silent(text, can_suppress = false, opts = {}) ⇒ Object 



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# File 'lib/haml2handlebars/engine.rb', line 75

def push_silent(text, can_suppress = false, opts = {})
  flush_merged_text
  return if can_suppress && options[:suppress_eval]
  # WAS:
  # @precompiled << "#{resolve_newlines}#{text}\n"
  # @output_line += text.count("\n") + 1

  push_script(text,
    opts.merge(:preserve_script => @node.value[:preserve],
    :escape_html => @node.value[:escape_html],
    :silent => true))
end

#to_handlebars(scope = Object.new, locals = {}, &block) ⇒ Object 



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# File 'lib/haml2handlebars/engine.rb', line 182

def to_handlebars(scope = Object.new, locals = {}, &block)
  buffer = Haml::Buffer.new(scope.instance_variable_get('@haml_buffer'), options_for_buffer)

  if scope.is_a?(Binding) || scope.is_a?(Proc)
    scope_object = eval("self", scope)
    scope = scope_object.instance_eval{binding} if block_given?
  else
    scope_object = scope
    scope = scope_object.instance_eval{binding}
  end

  set_locals(locals.merge(:_hamlout => buffer, :_erbout => buffer.buffer), scope, scope_object)

  scope_object.instance_eval do
    extend Haml::Helpers
    @haml_buffer = buffer
  end

  eval(precompiled + ";" + precompiled_method_return_value,
    scope, @options[:filename], @options[:line])
ensure
  # Get rid of the current buffer
  scope_object.instance_eval do
    @haml_buffer = buffer.upper if buffer
  end
end