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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/intl/NumberRangeFormat.h"
#include "mozilla/intl/ICU4CGlue.h"
#include "mozilla/intl/NumberFormat.h"
#include "NumberFormatFields.h"
#include "NumberFormatterSkeleton.h"
#include "ScopedICUObject.h"
#include "unicode/uformattedvalue.h"
#include "unicode/unumberrangeformatter.h"
#include "unicode/upluralrules.h"
namespace mozilla::intl {
/*static*/ Result<UniquePtr<NumberRangeFormat>, ICUError>
NumberRangeFormat::TryCreate(std::string_view aLocale,
const NumberRangeFormatOptions& aOptions) {
UniquePtr<NumberRangeFormat> nrf = MakeUnique<NumberRangeFormat>();
MOZ_TRY(nrf->initialize(aLocale, aOptions));
return nrf;
}
NumberRangeFormat::~NumberRangeFormat() {
if (mFormattedNumberRange) {
unumrf_closeResult(mFormattedNumberRange);
}
if (mNumberRangeFormatter) {
unumrf_close(mNumberRangeFormatter);
}
}
Result<Ok, ICUError> NumberRangeFormat::initialize(
std::string_view aLocale, const NumberRangeFormatOptions& aOptions) {
mFormatForUnit = aOptions.mUnit.isSome();
NumberFormatterSkeleton skeleton(aOptions);
mNumberRangeFormatter = skeleton.toRangeFormatter(
aLocale, aOptions.mRangeCollapse, aOptions.mRangeIdentityFallback);
if (mNumberRangeFormatter) {
UErrorCode status = U_ZERO_ERROR;
mFormattedNumberRange = unumrf_openResult(&status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
return Ok();
}
return Err(ICUError::InternalError);
}
Result<int32_t, ICUError> NumberRangeFormat::selectForRange(
double start, double end, char16_t* keyword, int32_t keywordSize,
const UPluralRules* pluralRules) const {
MOZ_ASSERT(keyword);
MOZ_ASSERT(pluralRules);
MOZ_TRY(format(start, end));
UErrorCode status = U_ZERO_ERROR;
int32_t utf16KeywordLength = uplrules_selectForRange(
pluralRules, mFormattedNumberRange, keyword, keywordSize, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
return utf16KeywordLength;
}
bool NumberRangeFormat::formatInternal(double start, double end) const {
// ICU incorrectly formats NaN values with the sign bit set, as if they
// were negative. Replace all NaNs with a single pattern with sign bit
// unset ("positive", that is) until ICU is fixed.
if (MOZ_UNLIKELY(std::isnan(start))) {
start = SpecificNaN<double>(0, 1);
}
if (MOZ_UNLIKELY(std::isnan(end))) {
end = SpecificNaN<double>(0, 1);
}
UErrorCode status = U_ZERO_ERROR;
unumrf_formatDoubleRange(mNumberRangeFormatter, start, end,
mFormattedNumberRange, &status);
return U_SUCCESS(status);
}
bool NumberRangeFormat::formatInternal(std::string_view start,
std::string_view end) const {
UErrorCode status = U_ZERO_ERROR;
unumrf_formatDecimalRange(mNumberRangeFormatter, start.data(), start.size(),
end.data(), end.size(), mFormattedNumberRange,
&status);
return U_SUCCESS(status);
}
Result<std::u16string_view, ICUError> NumberRangeFormat::formatResult() const {
UErrorCode status = U_ZERO_ERROR;
const UFormattedValue* formattedValue =
unumrf_resultAsValue(mFormattedNumberRange, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
int32_t utf16Length;
const char16_t* utf16Str =
ufmtval_getString(formattedValue, &utf16Length, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
return std::u16string_view(utf16Str, static_cast<size_t>(utf16Length));
}
Result<std::u16string_view, ICUError> NumberRangeFormat::formatResultToParts(
Maybe<double> start, bool startIsNegative, Maybe<double> end,
bool endIsNegative, NumberPartVector& parts) const {
UErrorCode status = U_ZERO_ERROR;
const UFormattedValue* formattedValue =
unumrf_resultAsValue(mFormattedNumberRange, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
int32_t utf16Length;
const char16_t* utf16Str =
ufmtval_getString(formattedValue, &utf16Length, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
UConstrainedFieldPosition* fpos = ucfpos_open(&status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
ScopedICUObject<UConstrainedFieldPosition, ucfpos_close> toCloseFpos(fpos);
Maybe<double> number = start;
bool isNegative = startIsNegative;
NumberPartSourceMap sourceMap;
// Vacuum up fields in the overall formatted string.
NumberFormatFields fields;
while (true) {
bool hasMore = ufmtval_nextPosition(formattedValue, fpos, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
if (!hasMore) {
break;
}
int32_t category = ucfpos_getCategory(fpos, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
int32_t fieldName = ucfpos_getField(fpos, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
int32_t beginIndex, endIndex;
ucfpos_getIndexes(fpos, &beginIndex, &endIndex, &status);
if (U_FAILURE(status)) {
return Err(ToICUError(status));
}
if (category == UFIELD_CATEGORY_NUMBER_RANGE_SPAN) {
// The special field category UFIELD_CATEGORY_NUMBER_RANGE_SPAN has only
// two allowed values (0 or 1), indicating the begin of the start resp.
// end number.
MOZ_ASSERT(fieldName == 0 || fieldName == 1,
"span category has unexpected value");
if (fieldName == 0) {
number = start;
isNegative = startIsNegative;
sourceMap.start = {uint32_t(beginIndex), uint32_t(endIndex)};
} else {
number = end;
isNegative = endIsNegative;
sourceMap.end = {uint32_t(beginIndex), uint32_t(endIndex)};
}
continue;
}
// Ignore categories other than UFIELD_CATEGORY_NUMBER.
if (category != UFIELD_CATEGORY_NUMBER) {
continue;
}
Maybe<NumberPartType> partType = GetPartTypeForNumberField(
UNumberFormatFields(fieldName), number, isNegative, mFormatForUnit);
if (!partType || !fields.append(*partType, beginIndex, endIndex)) {
return Err(ToICUError(status));
}
}
if (!fields.toPartsVector(utf16Length, sourceMap, parts)) {
return Err(ToICUError(status));
}
return std::u16string_view(utf16Str, static_cast<size_t>(utf16Length));
}
} // namespace mozilla::intl
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