Function i18nAttributesFirstPass

packages/core/src/render3/i18n/i18n_parse.ts:360–403

(tView: TView, index: number, values: string[])

 * See `i18nAttributes` above.
 */
export function i18nAttributesFirstPass(tView: TView, index: number, values: string[]) {
  const previousElement = getCurrentTNode()!;
  const previousElementIndex = previousElement.index;
  const updateOpCodes: I18nUpdateOpCodes = [] as any;
  if (ngDevMode) {
    attachDebugGetter(updateOpCodes, i18nUpdateOpCodesToString);
  }
  if (tView.firstCreatePass && tView.data[index] === null) {
    for (let i = 0; i < values.length; i += 2) {
      const attrName = values[i];
      const message = values[i + 1];

      if (message !== '') {
        // Check if attribute value contains an ICU and throw an error if that's the case.
        // ICUs in element attributes are not supported.
        // Note: we intentionally retain the error here by not using `ngDevMode`, because
        // the `value` can change based on the locale and users aren't guaranteed to hit
        // an invalid string while they're developing.
        if (ICU_REGEXP.test(message)) {
          throw new Error(
            `ICU expressions are not supported in attributes. Message: "${message}".`,
          );
        }

        // i18n attributes that hit this code path are guaranteed to have bindings, because
        // the compiler treats static i18n attributes as regular attribute bindings.
        // Since this may not be the first i18n attribute on this element we need to pass in how
        // many previous bindings there have already been.
        const tagName = previousElement.namespace
          ? `:${previousElement.namespace}:${previousElement.value}`
          : previousElement.value;
        generateBindingUpdateOpCodes(
          updateOpCodes,
          message,
          previousElementIndex,
          attrName,
          countBindings(updateOpCodes),
          i18nResolveSanitizer(attrName, tagName),
        );
      }
    }
    tView.data[index] = updateOpCodes;
  }
}

/**
 * Generate the OpCodes to update the bindings of a string.