[QUESTION] <link/> handling

[renanyoy]

How to handle < l i n k /> tag and append external css content ?

[renanyoy]

for now I preprocess the html before. but will be more handy to have a callback onCssRequested.
And maybe same for fonts declaration in css (@font-face), a callback onFontFamillyRequested.

 void prepareText() {
    text = widget.spine.file.asText.nbspFormat;
    int i = 0;
    // load external css
    while (i < text.length) {
      i = text.indexOf('<link', i);
      if (i < 0) break;
      final n0 = text.indexOf('/>', i);
      final n1 = text.indexOf('</link>', i);
      int n = 0;
      if (n0 > 0 && n1 > 0) {
        n = min(n0, n1);
        n += n == n0 ? 2 : 7;
      } else if (n0 > 0) {
        n = n0 + 2;
      } else if (n1 > 0) {
        n = n1 + 7;
      } else {
        break;
      }
      try {
        final xml = XmlDocument.parse(text.substring(i, n));
        final href = xml.rootElement.getAttribute('href');
        if (href != null && href.isFileExt('css')) {
          final aref = widget.spine.combine(href: href);
          final bytes = widget.epub.files[aref]?.content;
          if (bytes != null) {
            final style = '<style>${utf8.decode(bytes)}</style>';
            text = '${text.substring(0, i)}$style${text.substring(n)}';
            n = i + style.length;
          }
        }
      } catch (error) {
        Debug.info(error);
      }
      i = n;
    }
  }