Word → WordPress copy/paste filters

blocks.js

// re: https://github.com/WordPress/gutenberg/issues/16936
//
// n.b., these are pretty heavy-handed, they just strip out the comments & footnotes wholesale,
// and don't attempt to convert the content. Given a chance, I would try to ingest the footnotes
// in a more sophisticated way.

var ms_word_comments = function(node, doc) {

  // Only filter on DOM elements
  if (! node.getAttribute) {
    return;
  }

  // Filters are all based on 'style' and 'class' attributes
  var style = node.getAttribute('style');
  var className = node.getAttribute('class');

  // Convert "<a style='mso-comment-reference...'>text</a>" => "text"
  if (style && style.indexOf('mso-comment-reference') !== -1) {
    node.outerHTML = node.innerHTML;
    return;
  }

  // Remove "<span class=MsoCommentReference>...</span>"
  if (className && className.indexOf('MsoCommentReference') !== -1) {
    node.remove();
    return;
  }

  // Remove "<div style='mso-element:comment-list'>...</div>"
  if (style && style.indexOf('mso-element:comment-list') !== -1) {
    node.remove();
    return;
  }

  // Remove "<a class='msocomanchor'>...</a>"
  if (className && className.indexOf('msocomanchor') !== -1) {
    node.remove();
    return;
  }

  // Remove "<span style='mso-special-character:comment'>...</span>"
  if (style && style.indexOf('mso-special-character:comment') !== -1) {
    node.remove();
    return;
  }
};

var ms_word_footnotes = function(node, doc) {

  // Only filter on DOM elements
  if (! node.getAttribute) {
    return;
  }

  // Filters are all based on 'style' attributes
  var style = node.getAttribute('style');

  // Remove "<a style='mso-footnote-id...'>...</a>"
  // Note: for now we are just stripping out footnotes
  if (style && style.indexOf('mso-footnote-id') !== -1) {
    node.remove();
    return;
  }

  // Remove "<div style='mso-element:footnote-list'>...</div>"
  // Note: for now we are just stripping out footnotes
  if (style && style.indexOf('mso-element:footnote-list') !== -1) {
    node.remove();
    return;
  }
};

// Here is where these would plug in:
// https://github.com/WordPress/WordPress/blob/5.2.2/wp-includes/js/dist/blocks.js#L11063
var filters = [google_docs_uid_remover, ms_list_converter, ms_word_comments, ms_word_footnotes, head_remover, list_reducer, image_corrector, phrasing_content_reducer, special_comment_converter, comment_remover, figure_content_reducer, blockquote_normaliser];