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Bug 1719550 - Add a TryCreateComponent to LocaleService; r=platform-i18n-reviewers,nordzilla

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This method will allow mozilla::intl components to be initialized in the current
Gecko app's locale.

Differential Revision: https://phabricator.services.mozilla.com/D121428
This commit is contained in:
Greg Tatum 2021-08-10 16:01:16 +00:00
parent ebe4dfeceb
commit 8f0678e0b4
1 changed files with 21 additions and 1 deletions
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22
intl/locale/LocaleService.h
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@ -11,7 +11,7 @@
#include "nsTArray.h"
#include "nsWeakReference.h"
#include "MozLocaleBindings.h"
#include "mozilla/intl/ICU4CGlue.h"
#include "mozILocaleService.h"
namespace mozilla {
@ -173,6 +173,26 @@ class LocaleService final : public mozILocaleService,
bool IsServer();
/**
* Create a component from intl/components with the current app's locale. This
* is a convenience method for efficient string management with the app
* locale.
*/
template <typename T, typename... Args>
static Result<UniquePtr<T>, ICUError> TryCreateComponent(Args... args) {
// 32 is somewhat arbitrary for the length, but it should fit common
// locales, but locales such as the following will be heap allocated:
//
// "de-u-ca-gregory-fw-mon-hc-h23-co-phonebk-ka-noignore-kb-false-kc-
// false-kf-false-kh-false-kk-false-kn-false-kr-space-ks-level1-kv-space-cf-
// standard-cu-eur-ms-metric-nu-latn-lb-strict-lw-normal-ss-none-tz-atvie-em-
// default-rg-atzzzz-sd-atat1-va-posix"
nsAutoCStringN<32> appLocale;
mozilla::intl::LocaleService::GetInstance()->GetAppLocaleAsBCP47(appLocale);
return T::TryCreate(appLocale.get(), args...);
}
private:
void NegotiateAppLocales(nsTArray<nsCString>& aRetVal);