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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/* Structured representation of Unicode locale IDs used with Intl functions. */
#ifndef builtin_intl_LanguageTag_h
#define builtin_intl_LanguageTag_h
#include "mozilla/intl/Locale.h"
#include "mozilla/Span.h"
#include "js/Result.h"
#include "js/RootingAPI.h"
struct JS_PUBLIC_API JSContext;
class JSLinearString;
class JS_PUBLIC_API JSString;
class JS_PUBLIC_API JSTracer;
namespace js {
namespace intl {
/**
* Parse a string Unicode BCP 47 locale identifier. If successful, store in
* |result| and return true. Otherwise return false.
*/
[[nodiscard]] bool ParseLocale(JSContext* cx, JS::Handle<JSLinearString*> str,
mozilla::intl::Locale& result);
/**
* Parse a string as a standalone |language| tag. If |str| is a standalone
* language tag, store it in |result| and return true. Otherwise return false.
*/
[[nodiscard]] bool ParseStandaloneLanguageTag(
JS::Handle<JSLinearString*> str, mozilla::intl::LanguageSubtag& result);
/**
* Parse a string as a standalone |script| tag. If |str| is a standalone script
* tag, store it in |result| and return true. Otherwise return false.
*/
[[nodiscard]] bool ParseStandaloneScriptTag(
JS::Handle<JSLinearString*> str, mozilla::intl::ScriptSubtag& result);
/**
* Parse a string as a standalone |region| tag. If |str| is a standalone region
* tag, store it in |result| and return true. Otherwise return false.
*/
[[nodiscard]] bool ParseStandaloneRegionTag(
JS::Handle<JSLinearString*> str, mozilla::intl::RegionSubtag& result);
/**
* Parse a string as an ISO-639 language code. Return |nullptr| in the result if
* the input could not be parsed or the canonical form of the resulting language
* tag contains more than a single language subtag.
*/
JS::Result<JSString*> ParseStandaloneISO639LanguageTag(
JSContext* cx, JS::Handle<JSLinearString*> str);
class UnicodeExtensionKeyword final {
char key_[mozilla::intl::LanguageTagLimits::UnicodeKeyLength];
JSLinearString* type_;
public:
using UnicodeKey =
const char (&)[mozilla::intl::LanguageTagLimits::UnicodeKeyLength + 1];
using UnicodeKeySpan =
mozilla::Span<const char,
mozilla::intl::LanguageTagLimits::UnicodeKeyLength>;
UnicodeExtensionKeyword(UnicodeKey key, JSLinearString* type)
: key_{key[0], key[1]}, type_(type) {}
UnicodeKeySpan key() const { return {key_, sizeof(key_)}; }
JSLinearString* type() const { return type_; }
void trace(JSTracer* trc);
};
[[nodiscard]] extern bool ApplyUnicodeExtensionToTag(
JSContext* cx, mozilla::intl::Locale& tag,
JS::HandleVector<UnicodeExtensionKeyword> keywords);
} // namespace intl
} // namespace js
#endif /* builtin_intl_LanguageTag_h */
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