Class: DraftjsHtml::HtmlDepth

Inherits:
Object
  • Object
show all
Defined in:
lib/draftjs_html/html_depth.rb

Overview

This class manages the depth and nesting of the myriad HTML tags generated by DraftjsHtml::ToHtml. It is intended to be a private implementation detail.

Constant Summary collapse

BLOCK_TYPE_TO_HTML_WRAPPER =

:nodoc:

{
  'code-block' => 'pre',
  'ordered-list-item' => 'ol',
  'unordered-list-item' => 'ul',
}.freeze
LIST_ROOTS = 
%w[ol ul]

Instance Method Summary collapse

Constructor Details

#initialize(body) ⇒ HtmlDepth

Returns a new instance of HtmlDepth.



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# File 'lib/draftjs_html/html_depth.rb', line 11

def initialize(body)
  @current_depth = 0
  @body = body
  @previous_block = nil
end

Instance Method Details

#apply(block) ⇒ Object 



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# File 'lib/draftjs_html/html_depth.rb', line 19

def apply(block)
  if block.type == 'code-block'
    push_parent(block)
    store_previous(block)
    return
  end

  # Nesting lists - extra content same level
  if @current_depth > 0 && block.depth == @current_depth && block.type != @previous_block&.type
    set_li_as_root
    store_previous(block)
    return
  end

  # Nesting lists - deepening inside a proper list
  if block.depth == @current_depth + 1 && block.type == @previous_block&.type
    set_li_as_root
    push_parent(block)
    store_previous(block)
    return
  end

  # Nesting lists - deepening skipping level 0
  if block.depth > @current_depth && !list_block?(@previous_block)
    while @current_depth < block.depth
      push_parent(block)
      @body.parent = create_child('li')
      @current_depth += 1
    end
    push_parent(block)
    store_previous(block)
    return
  end

  # Nesting lists - deepening from inside skipping several levels
  if block.depth > @current_depth && list_block?(@previous_block)
    set_li_as_root
    while block.depth > @current_depth + 1
      push_parent(block)
      @body.parent = create_child('li')
      @current_depth += 1
    end
    push_parent(block)
    store_previous(block)
    return
  end

  # Nesting lists - rising
  if block.depth < @current_depth
    # pop_to_nearest_list_root, n times
    (@current_depth - block.depth).times do
      if @body.parent.name == 'li'
        pop_parent
        pop_parent
        pop_parent
      elsif LIST_ROOTS.include?(@body.parent.name)
        pop_parent
        pop_parent
      else
        pop_parent
      end
    end
  end

  # Sibling list items
  if block.depth == 0 && list_block?(block) && @previous_block&.type == block.type
    store_previous(block)
    return
  end

  # Any-old root list item
  if block.depth == 0 && list_block?(block) && @previous_block&.depth.to_i == 0
    push_parent(block)
    store_previous(block)
    return
  end

  # Leaving the list
  if block.depth == 0 && !list_block?(block) && (list_block?(@previous_block) || @previous_block&.depth.to_i > 0)
    pop_to_document_root
    store_previous(block)
    return
  end

  store_previous(block)
end