Class: Heartml::Fragment

Inherits:
Object
  • Object
show all
Defined in:
lib/heartml/fragment.rb

Instance Method Summary collapse

Constructor Details

#initialize(fragment, component) ⇒ Fragment

Returns a new instance of Fragment.



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# File 'lib/heartml/fragment.rb', line 5

def initialize(fragment, component)
  @fragment = fragment
  @component = component
  @attribute_bindings = component.class.attribute_bindings.each do |attr_def|
    attr_def.method = component.method(attr_def.method_name)
  end
end

Instance Method Details

#fragamatize(node_set) ⇒ Object 



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# File 'lib/heartml/fragment.rb', line 69

def fragamatize(node_set)
  frag = Nokolexbor::DocumentFragment.new(@fragment.document)
  node_set.each { |child| child.parent = frag }
  frag
end

#process(fragment = @fragment) ⇒ Object

rubocop:disable Metrics



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# File 'lib/heartml/fragment.rb', line 21

def process(fragment = @fragment) # rubocop:disable Metrics
  traverse(fragment) do |node| # rubocop:disable Metrics/BlockLength
    process_attribute_bindings(node)

    component = Heartml.registered_elements.find { _1.tag_name == node.name }
    if component
      attrs = node.attributes.dup

      new_attrs = {}
      attrs.each do |k, attr|
        unless k == "server-args"
          new_attrs[k] = attr.value
          next
        end
        v = attr.value

        params = v.split(";").map(&:strip)

        params.each do |param|
          new_key, v2 = param.split(":").map(&:strip)
          v2 ||= new_key

          new_attrs[new_key] = @component.evaluate_attribute_expression(attr, v2)
        end
        attrs.delete(k)
      end
      attrs.merge!(new_attrs)
      attrs.reject! { |k| k.start_with?("server-") || k.start_with?("iso-") }
      attrs.transform_keys! { _1.tr("-", "_").to_sym }

      obj = component.new(**attrs)
      render_output = if obj.respond_to?(:render_in)
                        obj.render_in(@component.context, rendering_mode: :node) do
                          process(fragamatize(node.children))
                        end
                      else
                        obj.render_element(
                          content: process(fragamatize(node.children)), context: @component.context
                        )
                      end

      node.replace(render_output)
    end
  end

  fragment
end

#process_attribute_bindings(node) ⇒ Object

rubocop:todo Metrics



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# File 'lib/heartml/fragment.rb', line 75

def process_attribute_bindings(node) # rubocop:todo Metrics
  node.attributes.each do |name, attr_node|
    @attribute_bindings.each do |attribute_binding|
      next if attribute_binding.only_for_tag && node.name != attribute_binding.only_for_tag.to_s
      next unless attribute_binding.matcher.match?(name)
      next if attribute_binding.method.receiver._check_stack(node)

      break unless attribute_binding.method.(attribute: attr_node, node:)
    end
  rescue Exception => e # rubocop:disable Lint/RescueException
    line_segments = [@component.class.heart_module, @component._line_number_of_node(attr_node)]
    raise e.class, e.message.lines.first, [line_segments.join(":"), *e.backtrace]
  end
end

#traverse(node) {|node| ... } ⇒ Object

NOTE: for some reason, the traverse method yields node children first, then the parent node. That doesn’t work for our case. We want to go strictly in source order. So this is our own implementation of that.

Yields:

  • (node) 


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# File 'lib/heartml/fragment.rb', line 16

def traverse(node, &block)
  yield(node)
  node.children.each { |child| traverse(child, &block) }
end