Contents

module CrazyHarry
  module Change

    BLOCK_CONVERSION_ELEMENTS = {
      inlines:  %w(br),
      blocks:   %w(div p)
    }

    attr_accessor :from, :to

    def change!(opts)
      self.from  =  opts.delete(:from)
      self.to    =  opts.delete(:to)
      self.text  =  opts.delete(:text)
      self.scope =  opts.delete(:scope)

      self.steps << generic_from_to
      self.steps << unwrap_unnecessary_paragraphs
      self.steps << foster_orphaned_nodes

      run!

      self
    end

    private

    def change_this_node?(node)
      ( self.text       ? node.text == self.text                          : true ) &&
      ( self.scope      ? node.parent.name == self.scope                  : true ) &&
      ( node.name == self.from )
    end

    def convert_inline_element_to_block?
      BLOCK_CONVERSION_ELEMENTS[:inlines].include?(self.from) &&
      BLOCK_CONVERSION_ELEMENTS[:blocks].include?(self.to)
    end

    def generic_from_to
      return if convert_inline_element_to_block?

      Loofah::Scrubber.new do |node|
        node.name = self.to if change_this_node?(node)
      end
    end

    def unwrap_unnecessary_paragraphs
      Loofah::Scrubber.new do |node|
        node.replace(node.children.first) if unnecessary_paragraph?(node)
      end
    end

    def unnecessary_paragraph?(node)
      node.name == 'p' &&
      node.children.size == 1 &&
      Loofah::Elements::BLOCK_LEVEL.include?(node.children.first.name)
    end

    def foster_orphaned_nodes
      Loofah::Scrubber.new do |node|
        node.extend(FosterModule)
        node.foster!
      end
    end
  end
  
  module FosterModule
    def foster!
      if orphaned_li?
        self.replace wrap_li
      end
    end

    def orphaned_li?
      name == 'li' && parent.name !~ /ol|ul/
    end
    
    def wrap_li
      Nokogiri.make("<ul>#{self}</ul>") 
    end
  end
end

Version data entries

3 entries across 3 versions & 1 rubygems

Version	Path
crazy_harry-0.2.1	lib/crazy_harry/change.rb
crazy_harry-0.2.0	lib/crazy_harry/change.rb
crazy_harry-0.1.2	lib/crazy_harry/change.rb