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// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/numberformatter.h"
#include "number_types.h"
#include "formatted_string_builder.h"
#include "number_decimfmtprops.h"
using namespace icu;
using namespace icu::number;
using namespace icu::number::impl;
namespace {
int32_t
addPaddingHelper(UChar32 paddingCp, int32_t requiredPadding, FormattedStringBuilder &string, int32_t index,
UErrorCode &status) {
for (int32_t i = 0; i < requiredPadding; i++) {
// TODO: If appending to the end, this will cause actual insertion operations. Improve.
string.insertCodePoint(index, paddingCp, UNUM_FIELD_COUNT, status);
}
return U16_LENGTH(paddingCp) * requiredPadding;
}
}
Padder::Padder(UChar32 cp, int32_t width, UNumberFormatPadPosition position) : fWidth(width) {
// TODO(13034): Consider making this a string instead of code point.
fUnion.padding.fCp = cp;
fUnion.padding.fPosition = position;
}
Padder::Padder(int32_t width) : fWidth(width) {}
Padder Padder::none() {
return {-1};
}
Padder Padder::codePoints(UChar32 cp, int32_t targetWidth, UNumberFormatPadPosition position) {
// TODO: Validate the code point?
if (targetWidth >= 0) {
return {cp, targetWidth, position};
} else {
return {U_NUMBER_ARG_OUTOFBOUNDS_ERROR};
}
}
Padder Padder::forProperties(const DecimalFormatProperties& properties) {
UChar32 padCp;
if (properties.padString.length() > 0) {
padCp = properties.padString.char32At(0);
} else {
padCp = kFallbackPaddingString[0];
}
return {padCp, properties.formatWidth, properties.padPosition.getOrDefault(UNUM_PAD_BEFORE_PREFIX)};
}
int32_t Padder::padAndApply(const Modifier &mod1, const Modifier &mod2,
FormattedStringBuilder &string, int32_t leftIndex, int32_t rightIndex,
UErrorCode &status) const {
int32_t modLength = mod1.getCodePointCount() + mod2.getCodePointCount();
int32_t requiredPadding = fWidth - modLength - string.codePointCount();
U_ASSERT(leftIndex == 0 &&
rightIndex == string.length()); // fix the previous line to remove this assertion
int length = 0;
if (requiredPadding <= 0) {
// Padding is not required.
length += mod1.apply(string, leftIndex, rightIndex, status);
length += mod2.apply(string, leftIndex, rightIndex + length, status);
return length;
}
PadPosition position = fUnion.padding.fPosition;
UChar32 paddingCp = fUnion.padding.fCp;
if (position == UNUM_PAD_AFTER_PREFIX) {
length += addPaddingHelper(paddingCp, requiredPadding, string, leftIndex, status);
} else if (position == UNUM_PAD_BEFORE_SUFFIX) {
length += addPaddingHelper(paddingCp, requiredPadding, string, rightIndex + length, status);
}
length += mod1.apply(string, leftIndex, rightIndex + length, status);
length += mod2.apply(string, leftIndex, rightIndex + length, status);
if (position == UNUM_PAD_BEFORE_PREFIX) {
length += addPaddingHelper(paddingCp, requiredPadding, string, leftIndex, status);
} else if (position == UNUM_PAD_AFTER_SUFFIX) {
length += addPaddingHelper(paddingCp, requiredPadding, string, rightIndex + length, status);
}
return length;
}
#endif /* #if !UCONFIG_NO_FORMATTING */
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