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/*
* Copyright (c) 2021, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/CharacterTypes.h>
#include <AK/Utf8View.h>
#include <LibUnicode/CharacterTypes.h>
#include <LibUnicode/Locale.h>
#include <LibUnicode/NumberFormat.h>
#if ENABLE_UNICODE_DATA
# include <LibUnicode/UnicodeData.h>
#endif
namespace Unicode {
Span<StringView const> __attribute__((weak)) get_available_number_systems() { return {}; }
Optional<NumberSystem> __attribute__((weak)) number_system_from_string(StringView) { return {}; }
Optional<StringView> __attribute__((weak)) get_number_system_symbol(StringView, StringView, NumericSymbol) { return {}; }
Optional<NumberGroupings> __attribute__((weak)) get_number_system_groupings(StringView, StringView) { return {}; }
Optional<NumberFormat> __attribute__((weak)) get_standard_number_system_format(StringView, StringView, StandardNumberFormatType) { return {}; }
Vector<NumberFormat> __attribute__((weak)) get_compact_number_system_formats(StringView, StringView, CompactNumberFormatType) { return {}; }
Vector<NumberFormat> __attribute__((weak)) get_unit_formats(StringView, StringView, Style) { return {}; }
Optional<StringView> get_default_number_system(StringView locale)
{
if (auto systems = get_keywords_for_locale(locale, "nu"sv); !systems.is_empty())
return systems[0];
return {};
}
Optional<Span<u32 const>> __attribute__((weak)) get_digits_for_number_system(StringView)
{
// Fall back to "latn" digits when Unicode data generation is disabled.
constexpr Array<u32, 10> digits { { 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39 } };
return digits.span();
}
String replace_digits_for_number_system(StringView system, StringView number)
{
auto digits = get_digits_for_number_system(system);
if (!digits.has_value())
digits = get_digits_for_number_system("latn"sv);
VERIFY(digits.has_value());
StringBuilder builder;
for (auto ch : number) {
if (is_ascii_digit(ch)) {
u32 digit = digits->at(parse_ascii_digit(ch));
builder.append_code_point(digit);
} else {
builder.append(ch);
}
}
return builder.build();
}
// https://www.unicode.org/reports/tr35/tr35-numbers.html#Currencies
Optional<String> augment_currency_format_pattern([[maybe_unused]] StringView currency_display, [[maybe_unused]] StringView base_pattern)
{
#if ENABLE_UNICODE_DATA
constexpr auto number_key = "{number}"sv;
constexpr auto currency_key = "{currency}"sv;
constexpr auto spacing = "\u00A0"sv; // No-Break Space (NBSP)
auto number_index = base_pattern.find(number_key);
VERIFY(number_index.has_value());
auto currency_index = base_pattern.find(currency_key);
VERIFY(currency_index.has_value());
Utf8View utf8_currency_display { currency_display };
Optional<String> currency_key_with_spacing;
auto last_code_point = [](StringView string) {
Utf8View utf8_string { string };
u32 code_point = 0;
for (auto it = utf8_string.begin(); it != utf8_string.end(); ++it)
code_point = *it;
return code_point;
};
if (*number_index < *currency_index) {
u32 last_pattern_code_point = last_code_point(base_pattern.substring_view(0, *currency_index));
if (!code_point_has_general_category(last_pattern_code_point, GeneralCategory::Separator)) {
u32 first_currency_code_point = *utf8_currency_display.begin();
if (!code_point_has_general_category(first_currency_code_point, GeneralCategory::Symbol))
currency_key_with_spacing = String::formatted("{}{}", spacing, currency_key);
}
} else {
u32 last_pattern_code_point = last_code_point(base_pattern.substring_view(0, *number_index));
if (!code_point_has_general_category(last_pattern_code_point, GeneralCategory::Separator)) {
u32 last_currency_code_point = last_code_point(currency_display);
if (!code_point_has_general_category(last_currency_code_point, GeneralCategory::Symbol))
currency_key_with_spacing = String::formatted("{}{}", currency_key, spacing);
}
}
if (currency_key_with_spacing.has_value())
return base_pattern.replace(currency_key, *currency_key_with_spacing);
#endif
return {};
}
}
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