Function applyStyleBorders

apps/sim/lib/pptx-renderer/renderer/table-renderer.ts:267–352

* Apply borders from a table style tcStyle node. * Structure: / / / ...

(
  td: HTMLElement,
  tcStyle: SafeXmlNode,
  ctx: RenderContext,
  rowIdx?: number,
  colIdx?: number,
  totalRows?: number,
  totalCols?: number
)

 * Structure: <a:tcStyle> <a:tcBdr> <a:top>/<a:bottom>/<a:left>/<a:right> <a:ln>...
 */
function applyStyleBorders(
  td: HTMLElement,
  tcStyle: SafeXmlNode,
  ctx: RenderContext,
  rowIdx?: number,
  colIdx?: number,
  totalRows?: number,
  totalCols?: number
): void {
  const tcBdr = tcStyle.child('tcBdr')
  if (!tcBdr.exists()) return

  const borderMap: Array<[string, 'borderTop' | 'borderBottom' | 'borderLeft' | 'borderRight']> = [
    ['top', 'borderTop'],
    ['bottom', 'borderBottom'],
    ['left', 'borderLeft'],
    ['right', 'borderRight'],
  ]

  // Map insideH/insideV to individual cell borders:
  // insideH → borderBottom for non-last rows, borderTop for non-first rows
  // insideV → borderRight for non-last cols, borderLeft for non-first cols
  const insideH = tcBdr.child('insideH')
  if (insideH.exists() && rowIdx !== undefined && totalRows !== undefined) {
    if (rowIdx < totalRows - 1) {
      borderMap.push(['insideH', 'borderBottom'])
    }
    if (rowIdx > 0) {
      borderMap.push(['insideH', 'borderTop'])
    }
  }
  const insideV = tcBdr.child('insideV')
  if (insideV.exists() && colIdx !== undefined && totalCols !== undefined) {
    if (colIdx < totalCols - 1) {
      borderMap.push(['insideV', 'borderRight'])
    }
    if (colIdx > 0) {
      borderMap.push(['insideV', 'borderLeft'])
    }
  }

  for (const [xmlName, cssProp] of borderMap) {
    const side = tcBdr.child(xmlName)
    if (!side.exists()) continue

    // Direct <a:ln> element
    const ln = side.child('ln')
    if (ln.exists()) {
      const noFill = ln.child('noFill')
      if (noFill.exists()) continue

      const style = resolveLineStyle(ln, ctx)
      if (style.width > 0 && style.color !== 'transparent') {
        td.style[cssProp] = `${Math.max(style.width, 0.5)}px ${style.dash} ${style.color}`
      }
      continue
    }