calculateHtmlDocDimensions property

Implementation

static String calculateHtmlDocDimensions = '''
(function() {
try {
  const body = document.body;
  const html = document.documentElement;

  // Remove scrolling and set proper styles for both platforms
  html.style.margin = '0';
  html.style.padding = '0';
  html.style.overflow = 'hidden';
  html.style.height = '100%';

  body.style.margin = '0';
  body.style.padding = '0';
  body.style.overflow = 'hidden';
  body.style.height = '100%';

  // Ensure all images are loaded
  const imgs = document.images;
  for (let i = 0; i < imgs.length; i++) {
    if (!imgs[i].complete) return -1;
  }

  // Compute dimensions
  let height = Math.max(
    body.scrollHeight, body.offsetHeight,
    html.clientHeight, html.scrollHeight, html.offsetHeight
  );
  let width = Math.max(
    body.scrollWidth, body.offsetWidth,
    html.clientWidth, html.scrollWidth, html.offsetWidth
  );

  return JSON.stringify({
    height: height.toString(),
    width: width.toString()
  });
} catch (e) {
  return JSON.stringify({ height: "400", width: "400" });
}
})();
''';