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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).release_allocated_value_but_fixme_should_propagate_errors();
- }
- 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, String {}), 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, x.code_points(), y.code_points());
- }
- void CollatorCompareFunction::visit_edges(Visitor& visitor)
- {
- Base::visit_edges(visitor);
- visitor.visit(m_collator);
- }
- }
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