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