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1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // ECMAScript 402 API implementation. | 5 // ECMAScript 402 API implementation. |
6 | 6 |
7 /** | 7 /** |
8 * Intl object is a single object that has some named properties, | 8 * Intl object is a single object that has some named properties, |
9 * all of which are constructors. | 9 * all of which are constructors. |
10 */ | 10 */ |
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711 ((lowercasedPart !== 'es' && | 711 ((lowercasedPart !== 'es' && |
712 lowercasedPart !== 'of' && lowercasedPart !== 'au') ? | 712 lowercasedPart !== 'of' && lowercasedPart !== 'au') ? |
713 toTitleCaseWord(part) : lowercasedPart); | 713 toTitleCaseWord(part) : lowercasedPart); |
714 } | 714 } |
715 } | 715 } |
716 return result; | 716 return result; |
717 } | 717 } |
718 | 718 |
719 /** | 719 /** |
720 * Canonicalizes the language tag, or throws in case the tag is invalid. | 720 * Canonicalizes the language tag, or throws in case the tag is invalid. |
721 * ECMA 402 9.2.1 steps 7.c ii ~ v. | |
721 */ | 722 */ |
722 function canonicalizeLanguageTag(localeID) { | 723 function canonicalizeLanguageTag(localeID) { |
723 // null is typeof 'object' so we have to do extra check. | 724 // null is typeof 'object' so we have to do extra check. |
724 if ((!IS_STRING(localeID) && !IS_RECEIVER(localeID)) || | 725 if ((!IS_STRING(localeID) && !IS_RECEIVER(localeID)) || |
725 IS_NULL(localeID)) { | 726 IS_NULL(localeID)) { |
726 throw %make_type_error(kLanguageID); | 727 throw %make_type_error(kLanguageID); |
727 } | 728 } |
728 | 729 |
729 // Optimize for the most common case; a language code alone in | 730 // Optimize for the most common case; a language code alone in |
730 // the canonical form/lowercase (e.g. "en", "fil"). | 731 // the canonical form/lowercase (e.g. "en", "fil"). |
731 if (IS_STRING(localeID) && | 732 if (IS_STRING(localeID) && |
732 !IS_NULL(InternalRegExpMatch(/^[a-z]{2,3}$/, localeID))) { | 733 !IS_NULL(InternalRegExpMatch(/^[a-z]{2,3}$/, localeID))) { |
733 return localeID; | 734 return localeID; |
734 } | 735 } |
735 | 736 |
736 var localeString = TO_STRING(localeID); | 737 var localeString = TO_STRING(localeID); |
737 | 738 |
738 if (isValidLanguageTag(localeString) === false) { | 739 if (isStructuallyValidLanguageTag(localeString) === false) { |
739 throw %make_range_error(kInvalidLanguageTag, localeString); | 740 throw %make_range_error(kInvalidLanguageTag, localeString); |
740 } | 741 } |
741 | 742 |
743 // ECMA 402 6.2.3 | |
742 var tag = %CanonicalizeLanguageTag(localeString); | 744 var tag = %CanonicalizeLanguageTag(localeString); |
745 // TODO(jshin): This should not happen because the structual validity | |
746 // is already checked. If that's the case, remove this. | |
743 if (tag === 'invalid-tag') { | 747 if (tag === 'invalid-tag') { |
744 throw %make_range_error(kInvalidLanguageTag, localeString); | 748 throw %make_range_error(kInvalidLanguageTag, localeString); |
745 } | 749 } |
746 | 750 |
747 return tag; | 751 return tag; |
748 } | 752 } |
749 | 753 |
750 | 754 |
751 /** | 755 /** |
752 * Returns an array where all locales are canonicalized and duplicates removed. | 756 * Returns an array where all locales are canonicalized and duplicates removed. |
753 * Throws on locales that are not well formed BCP47 tags. | 757 * Throws on locales that are not well formed BCP47 tags. |
758 * ECMA 402 8.2.1 steps 1 (ECMA 402 9.2.1) and 2. | |
754 */ | 759 */ |
755 function initializeLocaleList(locales) { | 760 function initializeLocaleList(locales) { |
756 var seen = new InternalArray(); | 761 var seen = new InternalArray(); |
757 if (!IS_UNDEFINED(locales)) { | 762 if (!IS_UNDEFINED(locales)) { |
758 // We allow single string localeID. | 763 // We allow single string localeID. |
759 if (typeof locales === 'string') { | 764 if (typeof locales === 'string') { |
760 %_Call(ArrayPush, seen, canonicalizeLanguageTag(locales)); | 765 %_Call(ArrayPush, seen, canonicalizeLanguageTag(locales)); |
761 return freezeArray(seen); | 766 return freezeArray(seen); |
762 } | 767 } |
763 | 768 |
764 var o = TO_OBJECT(locales); | 769 var o = TO_OBJECT(locales); |
765 var len = TO_UINT32(o.length); | 770 var len = TO_LENGTH(o.length); |
766 | 771 |
767 for (var k = 0; k < len; k++) { | 772 for (var k = 0; k < len; k++) { |
768 if (k in o) { | 773 if (k in o) { |
769 var value = o[k]; | 774 var value = o[k]; |
770 | 775 |
771 var tag = canonicalizeLanguageTag(value); | 776 var tag = canonicalizeLanguageTag(value); |
772 | 777 |
773 if (%_Call(ArrayIndexOf, seen, tag) === -1) { | 778 if (%_Call(ArrayIndexOf, seen, tag) === -1) { |
774 %_Call(ArrayPush, seen, tag); | 779 %_Call(ArrayPush, seen, tag); |
775 } | 780 } |
776 } | 781 } |
777 } | 782 } |
778 } | 783 } |
779 | 784 |
780 return freezeArray(seen); | 785 return freezeArray(seen); |
781 } | 786 } |
782 | 787 |
783 | 788 |
784 /** | 789 /** |
785 * Validates the language tag. Section 2.2.9 of the bcp47 spec | 790 * Check the structual Validity of the language tag per ECMA 402 6.2.2: |
786 * defines a valid tag. | 791 * - Well-formed per RFC 5646 2.1 |
792 * - There are no duplicate variant subtags | |
793 * - There are no duplicate singletion (extension) subtags | |
794 * | |
795 * One extra-check is done (from RFC 5646 2.2.9): the tag is compared | |
796 * against the list of grandfathered tags. However, subtags for | |
797 * primary/extended language, script, region, variant are not checked | |
798 * against the IANA language subtag registry. | |
787 * | 799 * |
788 * ICU is too permissible and lets invalid tags, like | 800 * ICU is too permissible and lets invalid tags, like |
789 * hant-cmn-cn, through. | 801 * hant-cmn-cn, through. |
790 * | 802 * |
791 * Returns false if the language tag is invalid. | 803 * Returns false if the language tag is invalid. |
792 */ | 804 */ |
793 function isValidLanguageTag(locale) { | 805 function isStructuallyValidLanguageTag(locale) { |
794 // Check if it's well-formed, including grandfadered tags. | 806 // Check if it's well-formed, including grandfadered tags. |
795 if (IS_NULL(InternalRegExpMatch(GetLanguageTagRE(), locale))) { | 807 if (IS_NULL(InternalRegExpMatch(GetLanguageTagRE(), locale))) { |
796 return false; | 808 return false; |
797 } | 809 } |
798 | 810 |
799 // Just return if it's a x- form. It's all private. | 811 // Just return if it's a x- form. It's all private. |
800 if (%_Call(StringIndexOf, locale, 'x-') === 0) { | 812 if (%_Call(StringIndexOf, locale, 'x-') === 0) { |
801 return true; | 813 return true; |
802 } | 814 } |
803 | 815 |
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878 var resolvedAccessor = { | 890 var resolvedAccessor = { |
879 get() { | 891 get() { |
880 %IncrementUseCounter(kIntlResolved); | 892 %IncrementUseCounter(kIntlResolved); |
881 return this[resolvedSymbol]; | 893 return this[resolvedSymbol]; |
882 }, | 894 }, |
883 set(value) { | 895 set(value) { |
884 this[resolvedSymbol] = value; | 896 this[resolvedSymbol] = value; |
885 } | 897 } |
886 }; | 898 }; |
887 | 899 |
900 // ECMA 402 section 8.2.1 | |
901 InstallFunction(Intl, 'getCanonicalLocales', function(locales) { | |
902 if (!IS_UNDEFINED(new.target)) { | |
903 throw %make_type_error(kOrdinaryFunctionCalledAsConstructor); | |
904 } | |
905 | |
906 return initializeLocaleList(locales); | |
Dan Ehrenberg
2016/08/11 21:07:01
This outputs a frozen Array, but the spec indicate
| |
907 } | |
908 ); | |
909 | |
888 /** | 910 /** |
889 * Initializes the given object so it's a valid Collator instance. | 911 * Initializes the given object so it's a valid Collator instance. |
890 * Useful for subclassing. | 912 * Useful for subclassing. |
891 */ | 913 */ |
892 function initializeCollator(collator, locales, options) { | 914 function initializeCollator(collator, locales, options) { |
893 if (%IsInitializedIntlObject(collator)) { | 915 if (%IsInitializedIntlObject(collator)) { |
894 throw %make_type_error(kReinitializeIntl, "Collator"); | 916 throw %make_type_error(kReinitializeIntl, "Collator"); |
895 } | 917 } |
896 | 918 |
897 if (IS_UNDEFINED(options)) { | 919 if (IS_UNDEFINED(options)) { |
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2246 } | 2268 } |
2247 ); | 2269 ); |
2248 | 2270 |
2249 utils.Export(function(to) { | 2271 utils.Export(function(to) { |
2250 to.AddBoundMethod = AddBoundMethod; | 2272 to.AddBoundMethod = AddBoundMethod; |
2251 to.IntlParseDate = IntlParseDate; | 2273 to.IntlParseDate = IntlParseDate; |
2252 to.IntlParseNumber = IntlParseNumber; | 2274 to.IntlParseNumber = IntlParseNumber; |
2253 }); | 2275 }); |
2254 | 2276 |
2255 }) | 2277 }) |
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