Source code
Revision control
Copy as Markdown
Other Tools
/* 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
#include "mozilla/intl/ListFormat.h"
#include "ScopedICUObject.h"
namespace mozilla::intl {
/*static*/ Result<UniquePtr<ListFormat>, ICUError> ListFormat::TryCreate(
mozilla::Span<const char> aLocale, const Options& aOptions) {
UListFormatterType utype = ToUListFormatterType(aOptions.mType);
UListFormatterWidth uwidth = ToUListFormatterWidth(aOptions.mStyle);
UErrorCode status = U_ZERO_ERROR;
UListFormatter* fmt =
ulistfmt_openForType(IcuLocale(aLocale), utype, uwidth, &status);
if (U_FAILURE(status)) {
return Err(ICUError::InternalError);
}
return UniquePtr<ListFormat>(new ListFormat(fmt));
}
ListFormat::~ListFormat() {
if (mListFormatter) {
ulistfmt_close(mListFormatter.GetMut());
}
}
/* static */ UListFormatterType ListFormat::ToUListFormatterType(Type type) {
switch (type) {
case Type::Conjunction:
return ULISTFMT_TYPE_AND;
case Type::Disjunction:
return ULISTFMT_TYPE_OR;
case Type::Unit:
return ULISTFMT_TYPE_UNITS;
}
MOZ_ASSERT_UNREACHABLE();
return ULISTFMT_TYPE_AND;
}
/* static */ UListFormatterWidth ListFormat::ToUListFormatterWidth(
Style style) {
switch (style) {
case Style::Long:
return ULISTFMT_WIDTH_WIDE;
case Style::Short:
return ULISTFMT_WIDTH_SHORT;
case Style::Narrow:
return ULISTFMT_WIDTH_NARROW;
}
MOZ_ASSERT_UNREACHABLE();
return ULISTFMT_WIDTH_WIDE;
}
ICUResult ListFormat::FormattedToParts(const UFormattedValue* formattedValue,
size_t formattedSize,
PartVector& parts) {
size_t lastEndIndex = 0;
auto AppendPart = [&](PartType type, size_t endIndex) {
if (!parts.emplaceBack(type, endIndex)) {
return false;
}
lastEndIndex = endIndex;
return true;
};
UErrorCode status = U_ZERO_ERROR;
UConstrainedFieldPosition* fpos = ucfpos_open(&status);
if (U_FAILURE(status)) {
return Err(ICUError::InternalError);
}
ScopedICUObject<UConstrainedFieldPosition, ucfpos_close> toCloseFpos(fpos);
// We're only interested in ULISTFMT_ELEMENT_FIELD fields.
ucfpos_constrainField(fpos, UFIELD_CATEGORY_LIST, ULISTFMT_ELEMENT_FIELD,
&status);
if (U_FAILURE(status)) {
return Err(ICUError::InternalError);
}
while (true) {
bool hasMore = ufmtval_nextPosition(formattedValue, fpos, &status);
if (U_FAILURE(status)) {
return Err(ICUError::InternalError);
}
if (!hasMore) {
break;
}
int32_t beginIndexInt, endIndexInt;
ucfpos_getIndexes(fpos, &beginIndexInt, &endIndexInt, &status);
if (U_FAILURE(status)) {
return Err(ICUError::InternalError);
}
MOZ_ASSERT(beginIndexInt <= endIndexInt,
"field iterator returning invalid range");
size_t beginIndex = AssertedCast<size_t>(beginIndexInt);
size_t endIndex = AssertedCast<size_t>(endIndexInt);
// Indices are guaranteed to be returned in order (from left to right).
MOZ_ASSERT(lastEndIndex <= beginIndex,
"field iteration didn't return fields in order start to "
"finish as expected");
if (lastEndIndex < beginIndex) {
if (!AppendPart(PartType::Literal, beginIndex)) {
return Err(ICUError::InternalError);
}
}
if (!AppendPart(PartType::Element, endIndex)) {
return Err(ICUError::InternalError);
}
}
// Append any final literal.
if (lastEndIndex < formattedSize) {
if (!AppendPart(PartType::Literal, formattedSize)) {
return Err(ICUError::InternalError);
}
}
return Ok();
}
} // namespace mozilla::intl