Function callHook

packages/core/src/render3/hooks.ts:305–324

* Execute one hook against the current `LView`. * * @param currentView The current view * @param initPhaseState the current state of the init phase * @param arr The array in which the hooks are found * @param i The current index within the hook data array

(currentView: LView, initPhase: InitPhaseState, arr: HookData, i: number)

 * @param i The current index within the hook data array
 */
function callHook(currentView: LView, initPhase: InitPhaseState, arr: HookData, i: number) {
  const isInitHook = (arr[i] as number) < 0;
  const hook = arr[i + 1] as () => void;
  const directiveIndex = isInitHook ? -arr[i] : (arr[i] as number);
  const directive = currentView[directiveIndex];
  if (isInitHook) {
    const indexWithintInitPhase = currentView[FLAGS] >> LViewFlags.IndexWithinInitPhaseShift;
    // The init phase state must be always checked here as it may have been recursively updated.
    if (
      indexWithintInitPhase <
        currentView[PREORDER_HOOK_FLAGS] >> PreOrderHookFlags.NumberOfInitHooksCalledShift &&
      (currentView[FLAGS] & LViewFlags.InitPhaseStateMask) === initPhase
    ) {
      currentView[FLAGS] += LViewFlags.IndexWithinInitPhaseIncrementer;
      callHookInternal(directive, hook);
    }
  } else {
    callHookInternal(directive, hook);
  }
}