Method acceptNode

src/content-scripts/verifyFrame.js:37–42

(node)

  calcSignatureHeight() {
    const treeWalker = document.createTreeWalker(this.pgpElement, NodeFilter.SHOW_TEXT, {
      acceptNode(node) {
        if (PGP_SIG_HEADER.test(node.textContent)) {
          return NodeFilter.FILTER_ACCEPT;
        }
        return NodeFilter.FILTER_REJECT;
      }
    }, false);
    const pgpSigBegin = treeWalker.nextNode();
    this.pgpSigRange = pgpSigBegin.ownerDocument.createRange();