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