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// © 2018 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
// This file contains one implementation of FormattedValue.
// Other independent implementations should go into their own cpp file for
// better dependency modularization.
#include "unicode/ustring.h"
#include "formattedval_impl.h"
#include "number_types.h"
#include "formatted_string_builder.h"
#include "number_utils.h"
#include "static_unicode_sets.h"
U_NAMESPACE_BEGIN
typedef FormattedStringBuilder::Field Field;
FormattedValueStringBuilderImpl::FormattedValueStringBuilderImpl(Field numericField)
: fNumericField(numericField) {
}
FormattedValueStringBuilderImpl::~FormattedValueStringBuilderImpl() {
}
UnicodeString FormattedValueStringBuilderImpl::toString(UErrorCode&) const {
return fString.toUnicodeString();
}
UnicodeString FormattedValueStringBuilderImpl::toTempString(UErrorCode&) const {
return fString.toTempUnicodeString();
}
Appendable& FormattedValueStringBuilderImpl::appendTo(Appendable& appendable, UErrorCode&) const {
appendable.appendString(fString.chars(), fString.length());
return appendable;
}
UBool FormattedValueStringBuilderImpl::nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const {
// NOTE: MSVC sometimes complains when implicitly converting between bool and UBool
return nextPositionImpl(cfpos, fNumericField, status) ? TRUE : FALSE;
}
UBool FormattedValueStringBuilderImpl::nextFieldPosition(FieldPosition& fp, UErrorCode& status) const {
int32_t rawField = fp.getField();
if (rawField == FieldPosition::DONT_CARE) {
return FALSE;
}
if (rawField < 0 || rawField >= UNUM_FIELD_COUNT) {
status = U_ILLEGAL_ARGUMENT_ERROR;
return FALSE;
}
ConstrainedFieldPosition cfpos;
cfpos.constrainField(UFIELD_CATEGORY_NUMBER, rawField);
cfpos.setState(UFIELD_CATEGORY_NUMBER, rawField, fp.getBeginIndex(), fp.getEndIndex());
if (nextPositionImpl(cfpos, 0, status)) {
fp.setBeginIndex(cfpos.getStart());
fp.setEndIndex(cfpos.getLimit());
return TRUE;
}
// Special case: fraction should start after integer if fraction is not present
if (rawField == UNUM_FRACTION_FIELD && fp.getEndIndex() == 0) {
bool inside = false;
int32_t i = fString.fZero;
for (; i < fString.fZero + fString.fLength; i++) {
if (isIntOrGroup(fString.getFieldPtr()[i]) || fString.getFieldPtr()[i] == UNUM_DECIMAL_SEPARATOR_FIELD) {
inside = true;
} else if (inside) {
break;
}
}
fp.setBeginIndex(i - fString.fZero);
fp.setEndIndex(i - fString.fZero);
}
return FALSE;
}
void FormattedValueStringBuilderImpl::getAllFieldPositions(FieldPositionIteratorHandler& fpih,
UErrorCode& status) const {
ConstrainedFieldPosition cfpos;
while (nextPositionImpl(cfpos, 0, status)) {
fpih.addAttribute(cfpos.getField(), cfpos.getStart(), cfpos.getLimit());
}
}
// Signal the end of the string using a field that doesn't exist and that is
// different from UNUM_FIELD_COUNT, which is used for "null number field".
static constexpr Field kEndField = 0xff;
bool FormattedValueStringBuilderImpl::nextPositionImpl(ConstrainedFieldPosition& cfpos, Field numericField, UErrorCode& /*status*/) const {
auto numericCAF = StringBuilderFieldUtils::expand(numericField);
int32_t fieldStart = -1;
Field currField = UNUM_FIELD_COUNT;
for (int32_t i = fString.fZero + cfpos.getLimit(); i <= fString.fZero + fString.fLength; i++) {
Field _field = (i < fString.fZero + fString.fLength) ? fString.getFieldPtr()[i] : kEndField;
// Case 1: currently scanning a field.
if (currField != UNUM_FIELD_COUNT) {
if (currField != _field) {
int32_t end = i - fString.fZero;
// Grouping separators can be whitespace; don't throw them out!
if (currField != UNUM_GROUPING_SEPARATOR_FIELD) {
end = trimBack(i - fString.fZero);
}
if (end <= fieldStart) {
// Entire field position is ignorable; skip.
fieldStart = -1;
currField = UNUM_FIELD_COUNT;
i--; // look at this index again
continue;
}
int32_t start = fieldStart;
if (currField != UNUM_GROUPING_SEPARATOR_FIELD) {
start = trimFront(start);
}
auto caf = StringBuilderFieldUtils::expand(currField);
cfpos.setState(caf.category, caf.field, start, end);
return true;
}
continue;
}
// Special case: coalesce the INTEGER if we are pointing at the end of the INTEGER.
if (cfpos.matchesField(UFIELD_CATEGORY_NUMBER, UNUM_INTEGER_FIELD)
&& i > fString.fZero
// don't return the same field twice in a row:
&& i - fString.fZero > cfpos.getLimit()
&& isIntOrGroup(fString.getFieldPtr()[i - 1])
&& !isIntOrGroup(_field)) {
int j = i - 1;
for (; j >= fString.fZero && isIntOrGroup(fString.getFieldPtr()[j]); j--) {}
cfpos.setState(
UFIELD_CATEGORY_NUMBER,
UNUM_INTEGER_FIELD,
j - fString.fZero + 1,
i - fString.fZero);
return true;
}
// Special case: coalesce NUMERIC if we are pointing at the end of the NUMERIC.
if (numericField != 0
&& cfpos.matchesField(numericCAF.category, numericCAF.field)
&& i > fString.fZero
// don't return the same field twice in a row:
&& (i - fString.fZero > cfpos.getLimit()
|| cfpos.getCategory() != numericCAF.category
|| cfpos.getField() != numericCAF.field)
&& isNumericField(fString.getFieldPtr()[i - 1])
&& !isNumericField(_field)) {
int j = i - 1;
for (; j >= fString.fZero && isNumericField(fString.getFieldPtr()[j]); j--) {}
cfpos.setState(
numericCAF.category,
numericCAF.field,
j - fString.fZero + 1,
i - fString.fZero);
return true;
}
// Special case: skip over INTEGER; will be coalesced later.
if (_field == UNUM_INTEGER_FIELD) {
_field = UNUM_FIELD_COUNT;
}
// Case 2: no field starting at this position.
if (_field == UNUM_FIELD_COUNT || _field == kEndField) {
continue;
}
// Case 3: check for field starting at this position
auto caf = StringBuilderFieldUtils::expand(_field);
if (cfpos.matchesField(caf.category, caf.field)) {
fieldStart = i - fString.fZero;
currField = _field;
}
}
U_ASSERT(currField == UNUM_FIELD_COUNT);
return false;
}
bool FormattedValueStringBuilderImpl::isIntOrGroup(Field field) {
return field == UNUM_INTEGER_FIELD
|| field == UNUM_GROUPING_SEPARATOR_FIELD;
}
bool FormattedValueStringBuilderImpl::isNumericField(Field field) {
return StringBuilderFieldUtils::isNumericField(field);
}
int32_t FormattedValueStringBuilderImpl::trimBack(int32_t limit) const {
return unisets::get(unisets::DEFAULT_IGNORABLES)->spanBack(
fString.getCharPtr() + fString.fZero,
limit,
USET_SPAN_CONTAINED);
}
int32_t FormattedValueStringBuilderImpl::trimFront(int32_t start) const {
return start + unisets::get(unisets::DEFAULT_IGNORABLES)->span(
fString.getCharPtr() + fString.fZero + start,
fString.fLength - start,
USET_SPAN_CONTAINED);
}
U_NAMESPACE_END
#endif /* #if !UCONFIG_NO_FORMATTING */
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