Function applyIcuSwitchCase

packages/core/src/render3/i18n/i18n_apply.ts:530–547

* Apply OpCodes associated with switching a case on ICU. * * This involves tearing down existing case and than building up a new case. * * @param tView Current `TView` * @param tIcu Current `TIcu` * @param lView Current `LView` * @param value Value of the case to update to.

(tView: TView, tIcu: TIcu, lView: LView, value: string)

 * @param value Value of the case to update to.
 */
function applyIcuSwitchCase(tView: TView, tIcu: TIcu, lView: LView, value: string) {
  // Rebuild a new case for this ICU
  const caseIndex = getCaseIndex(tIcu, value);
  let activeCaseIndex = getCurrentICUCaseIndex(tIcu, lView);
  if (activeCaseIndex !== caseIndex) {
    applyIcuSwitchCaseRemove(tView, tIcu, lView);
    lView[tIcu.currentCaseLViewIndex] = caseIndex === null ? null : ~caseIndex;
    if (caseIndex !== null) {
      // Add the nodes for the new case
      const anchorRNode = lView[tIcu.anchorIdx];
      if (anchorRNode) {
        ngDevMode && assertDomNode(anchorRNode);
        applyMutableOpCodes(tView, tIcu.create[caseIndex], lView, anchorRNode);
      }
      claimDehydratedIcuCase(lView, tIcu.anchorIdx, caseIndex);
    }
  }
}

/**
 * Apply OpCodes associated with tearing ICU case.