Function executeCompositeRender

packages/core/src/runtime/commit/composite.ts:69–275

(
  instanceId: InstanceId,
  vnode: VNode,
  compositeMeta: CompositeWidgetMeta,
  ctx: CommitCtx,
  nodePath: string[],
  depth: number,
  commitContainer: CommitContainerFn,
)

}

export function executeCompositeRender(
  instanceId: InstanceId,
  vnode: VNode,
  compositeMeta: CompositeWidgetMeta,
  ctx: CommitCtx,
  nodePath: string[],
  depth: number,
  commitContainer: CommitContainerFn,
): CommitNodeResult {
  const prev =
    ctx.prevNodeStack.length > 0 ? (ctx.prevNodeStack[ctx.prevNodeStack.length - 1] ?? null) : null;
  const compositeRuntime = ctx.composite as NonNullable<CommitCtx["composite"]>;

  let compositeChild: VNode | null = null;
  let popCompositeStack = false;
  try {
    const activeCompositeMeta = compositeMeta;
    const registry = compositeRuntime.registry;
    const existing = registry.get(instanceId);

    if (existing && existing.widgetKey !== compositeMeta.widgetKey) {
      registry.incrementGeneration(instanceId);
      registry.delete(instanceId);
    }

    if (!registry.get(instanceId)) {
      try {
        registry.create(instanceId, compositeMeta.widgetKey);
      } catch (e: unknown) {
        return {
          ok: false,
          fatal: {
            code: "ZRUI_USER_CODE_THROW",
            detail: describeThrown(e),
          },
        };
      }
    }

    const state = registry.get(instanceId);
    if (!state) {
      return {
        ok: false,
        fatal: {
          code: "ZRUI_INVALID_PROPS",
          detail: `composite state missing for instanceId=${String(instanceId)}`,
        },
      };
    }

    const invalidateInstance = () => {
      registry.invalidate(instanceId);
      ctx.composite?.onInvalidate(instanceId);
    };

    const prevMeta = prev ? getCompositeMeta(prev.vnode) : null;
    const prevChild = prev?.children[0] ?? null;
    const previousSelections = registry.getAppStateSelections(instanceId);