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LibJS: Handle the [[LanguageDisplay]] tag when localizing languages
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2 changed files with 63 additions and 12 deletions
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@ -6,6 +6,7 @@
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#include <AK/TypeCasts.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Intl/AbstractOperations.h>
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#include <LibJS/Runtime/Intl/DisplayNames.h>
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#include <LibJS/Runtime/Intl/DisplayNamesPrototype.h>
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#include <LibUnicode/Locale.h>
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@ -51,11 +52,18 @@ JS_DEFINE_NATIVE_FUNCTION(DisplayNamesPrototype::of)
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// 5. Let fields be displayNames.[[Fields]].
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// 6. If fields has a field [[<code>]], return fields.[[<code>]].
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Optional<StringView> result;
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Optional<String> formatted_result;
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switch (display_names->type()) {
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case DisplayNames::Type::Language:
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// FIXME: Handle the [[LanguageDisplay]] internal slot once we know where that data comes from.
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result = Unicode::get_locale_language_mapping(display_names->locale(), code.as_string().string());
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if (display_names->language_display() == DisplayNames::LanguageDisplay::Dialect) {
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result = Unicode::get_locale_language_mapping(display_names->locale(), code.as_string().string());
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if (result.has_value())
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break;
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}
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if (auto locale = is_structurally_valid_language_tag(code.as_string().string()); locale.has_value())
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formatted_result = Unicode::format_locale_for_display(display_names->locale(), locale.release_value());
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break;
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case DisplayNames::Type::Region:
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result = Unicode::get_locale_territory_mapping(display_names->locale(), code.as_string().string());
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@ -102,6 +110,8 @@ JS_DEFINE_NATIVE_FUNCTION(DisplayNamesPrototype::of)
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if (result.has_value())
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return js_string(vm, result.release_value());
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if (formatted_result.has_value())
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return js_string(vm, formatted_result.release_value());
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// 7. If displayNames.[[Fallback]] is "code", return code.
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if (display_names->fallback() == DisplayNames::Fallback::Code)
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