Function applyIcuUpdateCase

packages/core/src/render3/i18n/i18n_apply.ts:504–518

* Apply OpCodes associated with updating an existing ICU. * * @param tView Current `TView` * @param tIcu Current `TIcu` * @param bindingsStartIndex Location of the first `ɵɵi18nApply` * @param lView Current `LView`

(tView: TView, tIcu: TIcu, bindingsStartIndex: number, lView: LView)

 * @param lView Current `LView`
 */
function applyIcuUpdateCase(tView: TView, tIcu: TIcu, bindingsStartIndex: number, lView: LView) {
  ngDevMode && assertIndexInRange(lView, tIcu.currentCaseLViewIndex);
  let activeCaseIndex = lView[tIcu.currentCaseLViewIndex];
  if (activeCaseIndex !== null) {
    let mask = changeMask;
    if (activeCaseIndex < 0) {
      // Clear the flag.
      // Negative number means that the ICU was freshly created and we need to force the update.
      activeCaseIndex = lView[tIcu.currentCaseLViewIndex] = ~activeCaseIndex;
      // -1 is same as all bits on, which simulates creation since it marks all bits dirty
      mask = -1;
    }
    applyUpdateOpCodes(tView, lView, tIcu.update[activeCaseIndex], bindingsStartIndex, mask);
  }
}

/**
 * Apply OpCodes associated with switching a case on ICU.