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/*
* Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Utf8View.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/Collator.h>
#include <LibJS/Runtime/Intl/CollatorCompareFunction.h>
namespace JS::Intl {
NonnullGCPtr<CollatorCompareFunction> CollatorCompareFunction::create(Realm& realm, Collator& collator)
{
return *realm.heap().allocate<CollatorCompareFunction>(realm, realm, collator);
}
CollatorCompareFunction::CollatorCompareFunction(Realm& realm, Collator& collator)
: NativeFunction(*realm.intrinsics().function_prototype())
, m_collator(collator)
{
}
void CollatorCompareFunction::initialize(Realm&)
{
auto& vm = this->vm();
define_direct_property(vm.names.length, Value(2), Attribute::Configurable);
define_direct_property(vm.names.name, PrimitiveString::create(vm, DeprecatedString::empty()), Attribute::Configurable);
}
// 10.3.3.2 CompareStrings ( collator, x, y ), https://tc39.es/ecma402/#sec-collator-comparestrings
double compare_strings(Collator& collator, Utf8View const& x, Utf8View const& y)
{
// FIXME: Implement https://unicode.org/reports/tr10
(void)collator;
auto x_iterator = x.begin();
auto y_iterator = y.begin();
for (; x_iterator != x.end() && y_iterator != y.end(); ++x_iterator, ++y_iterator) {
if (*x_iterator != *y_iterator)
return static_cast<double>(*x_iterator) - static_cast<double>(*y_iterator);
}
if (x_iterator != x.end())
return 1.0;
if (y_iterator != y.end())
return -1.0;
return 0.0;
}
// 10.3.3.1 Collator Compare Functions, https://tc39.es/ecma402/#sec-collator-compare-functions
ThrowCompletionOr<Value> CollatorCompareFunction::call()
{
auto& vm = this->vm();
// 1. Let collator be F.[[Collator]].
// 2. Assert: Type(collator) is Object and collator has an [[InitializedCollator]] internal slot.
// 3. If x is not provided, let x be undefined.
// 4. If y is not provided, let y be undefined.
// 5. Let X be ? ToString(x).
auto x = TRY(vm.argument(0).to_string(vm));
// 6. Let Y be ? ToString(y).
auto y = TRY(vm.argument(1).to_string(vm));
// 7. Return CompareStrings(collator, X, Y).
return compare_strings(m_collator, Utf8View(x), Utf8View(y));
}
void CollatorCompareFunction::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(&m_collator);
}
}
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