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LibJS: Implement ECMA-402 Date.prototype.toLocaleString
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2 changed files with 93 additions and 6 deletions
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@ -11,10 +11,14 @@
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#include <AK/TypeCasts.h>
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#include <LibCore/DateTime.h>
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#include <LibCrypto/BigInt/UnsignedBigInteger.h>
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#include <LibJS/Runtime/AbstractOperations.h>
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#include <LibJS/Runtime/BigInt.h>
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#include <LibJS/Runtime/DatePrototype.h>
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#include <LibJS/Runtime/Error.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Intl/DateTimeFormat.h>
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#include <LibJS/Runtime/Intl/DateTimeFormatConstructor.h>
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#include <LibJS/Runtime/MarkedValueList.h>
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#include <LibJS/Runtime/Temporal/Instant.h>
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#include <LibJS/Runtime/Value.h>
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@ -667,6 +671,16 @@ JS_DEFINE_NATIVE_FUNCTION(DatePrototype::to_iso_string)
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return js_string(vm, move(string));
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}
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static ThrowCompletionOr<Intl::DateTimeFormat*> construct_date_time_format(GlobalObject& global_object, Value locales, Value options)
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{
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MarkedValueList arguments { global_object.vm().heap() };
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arguments.append(locales);
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arguments.append(options);
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auto* date_time_format = TRY(construct(global_object, *global_object.intl_date_time_format_constructor(), move(arguments)));
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return static_cast<Intl::DateTimeFormat*>(date_time_format);
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}
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// 21.4.4.38 Date.prototype.toLocaleDateString ( [ reserved1 [ , reserved2 ] ] ), https://tc39.es/ecma262/#sec-date.prototype.tolocaledatestring
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JS_DEFINE_NATIVE_FUNCTION(DatePrototype::to_locale_date_string)
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{
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@ -680,17 +694,29 @@ JS_DEFINE_NATIVE_FUNCTION(DatePrototype::to_locale_date_string)
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return js_string(vm, move(string));
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}
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// 21.4.4.39 Date.prototype.toLocaleString ( [ reserved1 [ , reserved2 ] ] ), https://tc39.es/ecma262/#sec-date.prototype.tolocalestring
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// 18.4.1 Date.prototype.toLocaleString ( [ locales [ , options ] ] ), https://tc39.es/ecma402/#sup-date.prototype.tolocalestring
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JS_DEFINE_NATIVE_FUNCTION(DatePrototype::to_locale_string)
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{
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auto locales = vm.argument(0);
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auto options = vm.argument(1);
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// 1. Let x be ? thisTimeValue(this value).
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auto* this_object = TRY(typed_this_object(global_object));
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auto time = this_object->is_invalid() ? js_nan() : this_object->value_of();
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if (this_object->is_invalid())
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return js_string(vm, "Invalid Date");
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// 2. If x is NaN, return "Invalid Date".
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if (time.is_nan())
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return js_string(vm, "Invalid Date"sv);
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// FIXME: Optional locales, options params.
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auto string = this_object->locale_string();
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return js_string(vm, move(string));
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// 3. Let options be ? ToDateTimeOptions(options, "any", "all").
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options = Value(TRY(Intl::to_date_time_options(global_object, options, Intl::OptionRequired::Any, Intl::OptionDefaults::All)));
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// 4. Let dateFormat be ? Construct(%DateTimeFormat%, « locales, options »).
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auto* date_format = TRY(construct_date_time_format(global_object, locales, options));
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// 5. Return ? FormatDateTime(dateFormat, x).
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auto formatted = TRY(Intl::format_date_time(global_object, *date_format, time));
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return js_string(vm, move(formatted));
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}
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// 21.4.4.40 Date.prototype.toLocaleTimeString ( [ reserved1 [ , reserved2 ] ] ), https://tc39.es/ecma262/#sec-date.prototype.tolocaletimestring
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