/src/serenity/Userland/Libraries/LibJS/Runtime/Intl/DisplayNames.cpp

Source
/*
 * Copyright (c) 2021-2022, Tim Flynn <trflynn89@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/AbstractOperations.h>
#include <LibJS/Runtime/Intl/DisplayNames.h>

namespace JS::Intl {

JS_DEFINE_ALLOCATOR(DisplayNames);

// 12 DisplayNames Objects, https://tc39.es/ecma402/#intl-displaynames-objects
DisplayNames::DisplayNames(Object& prototype)
    : Object(ConstructWithPrototypeTag::Tag, prototype)
{
}

void DisplayNames::set_type(StringView type)
{
    if (type == "language"sv)
        m_type = Type::Language;
    else if (type == "region"sv)
        m_type = Type::Region;
    else if (type == "script"sv)
        m_type = Type::Script;
    else if (type == "currency"sv)
        m_type = Type::Currency;
    else if (type == "calendar"sv)
        m_type = Type::Calendar;
    else if (type == "dateTimeField"sv)
        m_type = Type::DateTimeField;
    else
        VERIFY_NOT_REACHED();
}

StringView DisplayNames::type_string() const
{
    switch (m_type) {
    case Type::Language:
        return "language"sv;
    case Type::Region:
        return "region"sv;
    case Type::Script:
        return "script"sv;
    case Type::Currency:
        return "currency"sv;
    case Type::Calendar:
        return "calendar"sv;
    case Type::DateTimeField:
        return "dateTimeField"sv;
    default:
        VERIFY_NOT_REACHED();
    }
}

void DisplayNames::set_fallback(StringView fallback)
{
    if (fallback == "none"sv)
        m_fallback = Fallback::None;
    else if (fallback == "code"sv)
        m_fallback = Fallback::Code;
    else
        VERIFY_NOT_REACHED();
}

StringView DisplayNames::fallback_string() const
{
    switch (m_fallback) {
    case Fallback::None:
        return "none"sv;
    case Fallback::Code:
        return "code"sv;
    default:
        VERIFY_NOT_REACHED();
    }
}

void DisplayNames::set_language_display(StringView language_display)
{
    if (language_display == "dialect"sv)
        m_language_display = LanguageDisplay::Dialect;
    else if (language_display == "standard"sv)
        m_language_display = LanguageDisplay::Standard;
    else
        VERIFY_NOT_REACHED();
}

StringView DisplayNames::language_display_string() const
{
    VERIFY(m_language_display.has_value());

    switch (*m_language_display) {
    case LanguageDisplay::Dialect:
        return "dialect"sv;
    case LanguageDisplay::Standard:
        return "standard"sv;
    default:
        VERIFY_NOT_REACHED();
    }
}

// 12.5.1 CanonicalCodeForDisplayNames ( type, code ), https://tc39.es/ecma402/#sec-canonicalcodefordisplaynames
ThrowCompletionOr<Value> canonical_code_for_display_names(VM& vm, DisplayNames::Type type, StringView code)
{
    // 1. If type is "language", then
    if (type == DisplayNames::Type::Language) {
        // a. If code does not match the unicode_language_id production, throw a RangeError exception.
        if (!::Locale::parse_unicode_language_id(code).has_value())
            return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "language"sv);

        // b. If IsStructurallyValidLanguageTag(code) is false, throw a RangeError exception.
        auto locale_id = is_structurally_valid_language_tag(code);
        if (!locale_id.has_value())
            return vm.throw_completion<RangeError>(ErrorType::IntlInvalidLanguageTag, code);

        // c. Return ! CanonicalizeUnicodeLocaleId(code).
        auto canonicalized_tag = JS::Intl::canonicalize_unicode_locale_id(*locale_id);
        return PrimitiveString::create(vm, move(canonicalized_tag));
    }

    // 2. If type is "region", then
    if (type == DisplayNames::Type::Region) {
        // a. If code does not match the unicode_region_subtag production, throw a RangeError exception.
        if (!::Locale::is_unicode_region_subtag(code))
            return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "region"sv);

        // b. Return the ASCII-uppercase of code.
        return PrimitiveString::create(vm, code.to_uppercase_string());
    }

    // 3. If type is "script", then
    if (type == DisplayNames::Type::Script) {
        // a. If code does not match the unicode_script_subtag production, throw a RangeError exception.
        if (!::Locale::is_unicode_script_subtag(code))
            return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "script"sv);

        // Assert: The length of code is 4, and every code unit of code represents an ASCII letter (0x0041 through 0x005A and 0x0061 through 0x007A, both inclusive).
        VERIFY(code.length() == 4);
        VERIFY(all_of(code, is_ascii_alpha));

        // c. Let first be the ASCII-uppercase of the substring of code from 0 to 1.
        // d. Let rest be the ASCII-lowercase of the substring of code from 1.
        // e. Return the string-concatenation of first and rest.
        return PrimitiveString::create(vm, code.to_titlecase_string());
    }

    // 4. If type is "calendar", then
    if (type == DisplayNames::Type::Calendar) {
        // a. If code does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
        if (!::Locale::is_type_identifier(code))
            return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "calendar"sv);

        // b. If code uses any of the backwards compatibility syntax described in Unicode Technical Standard #35 LDML § 3.3 BCP 47 Conformance, throw a RangeError exception.
        if (code.contains('_'))
            return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "calendar"sv);

        // c. Return the ASCII-lowercase of code.
        return PrimitiveString::create(vm, code.to_lowercase_string());
    }

    // 5. If type is "dateTimeField", then
    if (type == DisplayNames::Type::DateTimeField) {
        // a. If the result of IsValidDateTimeFieldCode(code) is false, throw a RangeError exception.
        if (!is_valid_date_time_field_code(code))
            return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "dateTimeField"sv);

        // b. Return code.
        return PrimitiveString::create(vm, code);
    }

    // 6. Assert: type is "currency".
    VERIFY(type == DisplayNames::Type::Currency);

    // 7. If ! IsWellFormedCurrencyCode(code) is false, throw a RangeError exception.
    if (!is_well_formed_currency_code(code))
        return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "currency"sv);

    // 8. Return the ASCII-uppercase of code.
    return PrimitiveString::create(vm, code.to_uppercase_string());
}

// 12.5.2 IsValidDateTimeFieldCode ( field ), https://tc39.es/ecma402/#sec-isvaliddatetimefieldcode
bool is_valid_date_time_field_code(StringView field)
{
    // 1. If field is listed in the Code column of Table 9, return true.
    // 2. Return false.
    return field.is_one_of("era"sv, "year"sv, "quarter"sv, "month"sv, "weekOfYear"sv, "weekday"sv, "day"sv, "dayPeriod"sv, "hour"sv, "minute"sv, "second"sv, "timeZoneName"sv);
}

}

Line	Count	Source
1		/*
2		* Copyright (c) 2021-2022, Tim Flynn <trflynn89@serenityos.org>
3		*
4		* SPDX-License-Identifier: BSD-2-Clause
5		*/
6
7		#include <LibJS/Runtime/GlobalObject.h>
8		#include <LibJS/Runtime/Intl/AbstractOperations.h>
9		#include <LibJS/Runtime/Intl/DisplayNames.h>
10
11		namespace JS::Intl {
12
13		JS_DEFINE_ALLOCATOR(DisplayNames);
14
15		// 12 DisplayNames Objects, https://tc39.es/ecma402/#intl-displaynames-objects
16		DisplayNames::DisplayNames(Object& prototype)
17	0	: Object(ConstructWithPrototypeTag::Tag, prototype)
18	0	{
19	0	}
20
21		void DisplayNames::set_type(StringView type)
22	0	{
23	0	if (type == "language"sv)
24	0	m_type = Type::Language;
25	0	else if (type == "region"sv)
26	0	m_type = Type::Region;
27	0	else if (type == "script"sv)
28	0	m_type = Type::Script;
29	0	else if (type == "currency"sv)
30	0	m_type = Type::Currency;
31	0	else if (type == "calendar"sv)
32	0	m_type = Type::Calendar;
33	0	else if (type == "dateTimeField"sv)
34	0	m_type = Type::DateTimeField;
35	0	else
36	0	VERIFY_NOT_REACHED();
37	0	}
38
39		StringView DisplayNames::type_string() const
40	0	{
41	0	switch (m_type) {
42	0	case Type::Language:
43	0	return "language"sv;
44	0	case Type::Region:
45	0	return "region"sv;
46	0	case Type::Script:
47	0	return "script"sv;
48	0	case Type::Currency:
49	0	return "currency"sv;
50	0	case Type::Calendar:
51	0	return "calendar"sv;
52	0	case Type::DateTimeField:
53	0	return "dateTimeField"sv;
54	0	default:
55	0	VERIFY_NOT_REACHED();
56	0	}
57	0	}
58
59		void DisplayNames::set_fallback(StringView fallback)
60	0	{
61	0	if (fallback == "none"sv)
62	0	m_fallback = Fallback::None;
63	0	else if (fallback == "code"sv)
64	0	m_fallback = Fallback::Code;
65	0	else
66	0	VERIFY_NOT_REACHED();
67	0	}
68
69		StringView DisplayNames::fallback_string() const
70	0	{
71	0	switch (m_fallback) {
72	0	case Fallback::None:
73	0	return "none"sv;
74	0	case Fallback::Code:
75	0	return "code"sv;
76	0	default:
77	0	VERIFY_NOT_REACHED();
78	0	}
79	0	}
80
81		void DisplayNames::set_language_display(StringView language_display)
82	0	{
83	0	if (language_display == "dialect"sv)
84	0	m_language_display = LanguageDisplay::Dialect;
85	0	else if (language_display == "standard"sv)
86	0	m_language_display = LanguageDisplay::Standard;
87	0	else
88	0	VERIFY_NOT_REACHED();
89	0	}
90
91		StringView DisplayNames::language_display_string() const
92	0	{
93	0	VERIFY(m_language_display.has_value());
94
95	0	switch (*m_language_display) {
96	0	case LanguageDisplay::Dialect:
97	0	return "dialect"sv;
98	0	case LanguageDisplay::Standard:
99	0	return "standard"sv;
100	0	default:
101	0	VERIFY_NOT_REACHED();
102	0	}
103	0	}
104
105		// 12.5.1 CanonicalCodeForDisplayNames ( type, code ), https://tc39.es/ecma402/#sec-canonicalcodefordisplaynames
106		ThrowCompletionOr<Value> canonical_code_for_display_names(VM& vm, DisplayNames::Type type, StringView code)
107	0	{
108		// 1. If type is "language", then
109	0	if (type == DisplayNames::Type::Language) {
110		// a. If code does not match the unicode_language_id production, throw a RangeError exception.
111	0	if (!::Locale::parse_unicode_language_id(code).has_value())
112	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "language"sv);
113
114		// b. If IsStructurallyValidLanguageTag(code) is false, throw a RangeError exception.
115	0	auto locale_id = is_structurally_valid_language_tag(code);
116	0	if (!locale_id.has_value())
117	0	return vm.throw_completion<RangeError>(ErrorType::IntlInvalidLanguageTag, code);
118
119		// c. Return ! CanonicalizeUnicodeLocaleId(code).
120	0	auto canonicalized_tag = JS::Intl::canonicalize_unicode_locale_id(*locale_id);
121	0	return PrimitiveString::create(vm, move(canonicalized_tag));
122	0	}
123
124		// 2. If type is "region", then
125	0	if (type == DisplayNames::Type::Region) {
126		// a. If code does not match the unicode_region_subtag production, throw a RangeError exception.
127	0	if (!::Locale::is_unicode_region_subtag(code))
128	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "region"sv);
129
130		// b. Return the ASCII-uppercase of code.
131	0	return PrimitiveString::create(vm, code.to_uppercase_string());
132	0	}
133
134		// 3. If type is "script", then
135	0	if (type == DisplayNames::Type::Script) {
136		// a. If code does not match the unicode_script_subtag production, throw a RangeError exception.
137	0	if (!::Locale::is_unicode_script_subtag(code))
138	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "script"sv);
139
140		// Assert: The length of code is 4, and every code unit of code represents an ASCII letter (0x0041 through 0x005A and 0x0061 through 0x007A, both inclusive).
141	0	VERIFY(code.length() == 4);
142	0	VERIFY(all_of(code, is_ascii_alpha));
143
144		// c. Let first be the ASCII-uppercase of the substring of code from 0 to 1.
145		// d. Let rest be the ASCII-lowercase of the substring of code from 1.
146		// e. Return the string-concatenation of first and rest.
147	0	return PrimitiveString::create(vm, code.to_titlecase_string());
148	0	}
149
150		// 4. If type is "calendar", then
151	0	if (type == DisplayNames::Type::Calendar) {
152		// a. If code does not match the Unicode Locale Identifier type nonterminal, throw a RangeError exception.
153	0	if (!::Locale::is_type_identifier(code))
154	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "calendar"sv);
155
156		// b. If code uses any of the backwards compatibility syntax described in Unicode Technical Standard #35 LDML § 3.3 BCP 47 Conformance, throw a RangeError exception.
157	0	if (code.contains('_'))
158	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "calendar"sv);
159
160		// c. Return the ASCII-lowercase of code.
161	0	return PrimitiveString::create(vm, code.to_lowercase_string());
162	0	}
163
164		// 5. If type is "dateTimeField", then
165	0	if (type == DisplayNames::Type::DateTimeField) {
166		// a. If the result of IsValidDateTimeFieldCode(code) is false, throw a RangeError exception.
167	0	if (!is_valid_date_time_field_code(code))
168	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "dateTimeField"sv);
169
170		// b. Return code.
171	0	return PrimitiveString::create(vm, code);
172	0	}
173
174		// 6. Assert: type is "currency".
175	0	VERIFY(type == DisplayNames::Type::Currency);
176
177		// 7. If ! IsWellFormedCurrencyCode(code) is false, throw a RangeError exception.
178	0	if (!is_well_formed_currency_code(code))
179	0	return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, code, "currency"sv);
180
181		// 8. Return the ASCII-uppercase of code.
182	0	return PrimitiveString::create(vm, code.to_uppercase_string());
183	0	}
184
185		// 12.5.2 IsValidDateTimeFieldCode ( field ), https://tc39.es/ecma402/#sec-isvaliddatetimefieldcode
186		bool is_valid_date_time_field_code(StringView field)
187	0	{
188		// 1. If field is listed in the Code column of Table 9, return true.
189		// 2. Return false.
190	0	return field.is_one_of("era"sv, "year"sv, "quarter"sv, "month"sv, "weekOfYear"sv, "weekday"sv, "day"sv, "dayPeriod"sv, "hour"sv, "minute"sv, "second"sv, "timeZoneName"sv);
191	0	}
192
193		}

Coverage Report

Created: 2025-11-16 07:46