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LibJS: Implement Intl.NumberFormat.prototype.formatToParts

This commit is contained in:
Timothy Flynn 2021-11-13 11:33:55 -05:00 committed by Linus Groh
parent 40973814e9
commit 3450def494
5 changed files with 975 additions and 0 deletions

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@ -5,6 +5,7 @@
*/
#include <AK/Array.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/NumberFormat.h>
#include <LibJS/Runtime/Intl/NumberFormatFunction.h>
@ -959,6 +960,43 @@ String format_numeric(NumberFormat& number_format, double number)
return result.build();
}
// 15.1.9 FormatNumericToParts ( numberFormat, x ), https://tc39.es/ecma402/#sec-formatnumbertoparts
Array* format_numeric_to_parts(GlobalObject& global_object, NumberFormat& number_format, double number)
{
auto& vm = global_object.vm();
// 1. Let parts be ? PartitionNumberPattern(numberFormat, x).
// Note: Our implementation of PartitionNumberPattern does not throw.
auto parts = partition_number_pattern(number_format, number);
// 2. Let result be ArrayCreate(0).
auto* result = MUST(Array::create(global_object, 0));
// 3. Let n be 0.
size_t n = 0;
// 4. For each Record { [[Type]], [[Value]] } part in parts, do
for (auto& part : parts) {
// a. Let O be OrdinaryObjectCreate(%Object.prototype%).
auto* object = Object::create(global_object, global_object.object_prototype());
// b. Perform ! CreateDataPropertyOrThrow(O, "type", part.[[Type]]).
MUST(object->create_data_property_or_throw(vm.names.type, js_string(vm, part.type)));
// c. Perform ! CreateDataPropertyOrThrow(O, "value", part.[[Value]]).
MUST(object->create_data_property_or_throw(vm.names.value, js_string(vm, move(part.value))));
// d. Perform ! CreateDataPropertyOrThrow(result, ! ToString(n), O).
MUST(result->create_data_property_or_throw(n, object));
// e. Increment n by 1.
++n;
}
// 5. Return result.
return result;
}
static String cut_trailing_zeroes(StringView string, int cut)
{
// These steps are exactly the same between ToRawPrecision and ToRawFixed.

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@ -199,6 +199,7 @@ FormatResult format_numeric_to_string(NumberFormat& number_format, double number
Vector<PatternPartition> partition_number_pattern(NumberFormat& number_format, double number);
Vector<PatternPartition> partition_notation_sub_pattern(NumberFormat& number_format, double number, String formatted_string, int exponent);
String format_numeric(NumberFormat& number_format, double number);
Array* format_numeric_to_parts(GlobalObject& global_object, NumberFormat& number_format, double number);
RawFormatResult to_raw_precision(double number, int min_precision, int max_precision);
RawFormatResult to_raw_fixed(double number, int min_fraction, int max_fraction);
ThrowCompletionOr<void> set_number_format_unit_options(GlobalObject& global_object, NumberFormat& intl_object, Object const& options);

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@ -5,6 +5,7 @@
*/
#include <AK/TypeCasts.h>
#include <LibJS/Runtime/Array.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/NumberFormat.h>
#include <LibJS/Runtime/Intl/NumberFormatFunction.h>
@ -30,6 +31,7 @@ void NumberFormatPrototype::initialize(GlobalObject& global_object)
define_native_accessor(vm.names.format, format, nullptr, Attribute::Configurable);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.formatToParts, format_to_parts, 1, attr);
define_native_function(vm.names.resolvedOptions, resolved_options, 0, attr);
}
@ -56,6 +58,27 @@ JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format)
return number_format->bound_format();
}
// 15.4.4 Intl.NumberFormat.prototype.formatToParts ( value ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.formattoparts
JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_to_parts)
{
auto value = vm.argument(0);
// 1. Let nf be the this value.
// 2. Perform ? RequireInternalSlot(nf, [[InitializedNumberFormat]]).
auto* number_format = TRY(typed_this_object(global_object));
// 3. Let x be ? ToNumeric(value).
value = TRY(value.to_numeric(global_object));
// FIXME: Support BigInt number formatting.
if (value.is_bigint())
return vm.throw_completion<InternalError>(global_object, ErrorType::NotImplemented, "BigInt number formatting");
// 4. Return ? FormatNumericToParts(nf, x).
// Note: Our implementation of FormatNumericToParts does not throw.
return format_numeric_to_parts(global_object, *number_format, value.as_double());
}
// 15.4.5 Intl.NumberFormat.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.resolvedoptions
JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::resolved_options)
{

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@ -21,6 +21,7 @@ public:
private:
JS_DECLARE_NATIVE_FUNCTION(format);
JS_DECLARE_NATIVE_FUNCTION(format_to_parts);
JS_DECLARE_NATIVE_FUNCTION(resolved_options);
};