Function spHasVisibleFillOrLine

packages/@openmaic/importer/src/model/Slide.ts:340–364

* True when an sp is a visible "box" — has an explicit fill or a visible border * (either directly in spPr or via a non-zero p:style fillRef/lnRef). Such a box * whose only label is an inline formula (e.g. slide 26 的彩色 x / W₁ / σ 方框， * 标签是 a14:m 公式而非文本 run) must be parsed as a SHAPE so its背景色/边框得

(sp: SafeXmlNode)

 * 无边框）仍走 parseMathNode 以获得正确的块级排版与缩放。
 */
function spHasVisibleFillOrLine(sp: SafeXmlNode): boolean {
  const spPr = sp.child('spPr');
  const spPrHasNoFill = spPr.exists() && spPr.child('noFill').exists();
  if (spPr.exists()) {
    for (const tag of ['solidFill', 'gradFill', 'blipFill', 'pattFill']) {
      if (spPr.child(tag).exists()) return true;
    }
    const ln = spPr.child('ln');
    if (ln.exists() && !ln.child('noFill').exists()) {
      for (const tag of ['solidFill', 'gradFill', 'pattFill']) {
        if (ln.child(tag).exists()) return true;
      }
    }
  }
  const style = sp.child('style');
  if (style.exists()) {
    if (!spPrHasNoFill) {
      const fillRef = style.child('fillRef');
      if (fillRef.exists() && (fillRef.attr('idx') ?? '0') !== '0') return true;
    }
    const lnRef = style.child('lnRef');
    if (lnRef.exists() && (lnRef.attr('idx') ?? '0') !== '0') return true;
  }
  return false;
}

/**
 * Parse a single child node from spTree, dispatching to the appropriate parser.