Function handleSetHold

packages/sdk/src/engine/mutate.ts:564–591

(
  parsed: ParsedDocument,
  ids: HfId[],
  hold: { start: number; end: number; fill: "freeze" | "loop" },
)

}

function handleSetHold(
  parsed: ParsedDocument,
  ids: HfId[],
  hold: { start: number; end: number; fill: "freeze" | "loop" },
): MutationResult {
  const result: MutationResult = { forward: [], inverse: [] };
  for (const id of ids) {
    const el = resolveScoped(parsed.document, id);
    if (!el) continue;

    const fields: Array<["start" | "end" | "fill", string]> = [
      ["start", String(hold.start)],
      ["end", String(hold.end)],
      ["fill", hold.fill],
    ];

    for (const [field, newVal] of fields) {
      const attrName = `data-hold-${field}`;
      const oldVal = el.getAttribute(attrName);
      const path = holdPath(id, field);
      el.setAttribute(attrName, newVal);
      const p = scalarChange(path, oldVal, newVal);
      result.forward.push(p.forward);
      result.inverse.push(p.inverse);
    }
  }
  return result;
}

function handleRemoveElement(parsed: ParsedDocument, ids: HfId[]): MutationResult {
  const result: MutationResult = { forward: [], inverse: [] };