ページ内のすべてのURLについて，正規表現`url_regex`にマッチするものを紫色で強調 for vimperator

_vimperatorrc_highlight_urls.js

"=============================================================================="
" Hightlight matched URLs                                                      "
" usage(example):                                                              "
"   :highlightUrls [regex]                                                     "
"   :highlightUrls github|gitlab                                               "
"=============================================================================="
js <<EOM
commands.addUserCommand(
  ["highlightUrls"],
  "Highlight matched URLs",
  function(args){
    let url_regex = new RegExp(args.join(""));
    let iterator = gBrowser.contentDocument.evaluate(
      "//a",
      gBrowser.contentDocument,
      null,
      XPathResult.ORDERED_NODE_ITERATOR_TYPE,
      null);
    let highlighter = function(elm) {
      elm.style =
        "font-weight:900;" +
        "color:white;" +
        "background-color:purple;";
    };
    let node;
    while ( node = iterator.iterateNext() ) {
      if ( node.href.match(url_regex) ) {
        setTimeout(function(_node){highlighter(_node)}, 0, node);
      }
    }
  },
  {},
  true
);
EOM