306 lines
9.5 KiB
C++
306 lines
9.5 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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**********************************************************************
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* Copyright (c) 2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#include "unicode/scientificnumberformatter.h"
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#include "unicode/dcfmtsym.h"
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#include "unicode/fpositer.h"
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#include "unicode/utf16.h"
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#include "unicode/uniset.h"
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#include "unicode/decimfmt.h"
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#include "numparse_unisets.h"
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U_NAMESPACE_BEGIN
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static const UChar kSuperscriptDigits[] = {
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0x2070,
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0xB9,
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0xB2,
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0xB3,
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0x2074,
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0x2075,
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0x2076,
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0x2077,
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0x2078,
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0x2079};
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static const UChar kSuperscriptPlusSign = 0x207A;
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static const UChar kSuperscriptMinusSign = 0x207B;
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static UBool copyAsSuperscript(
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const UnicodeString &s,
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int32_t beginIndex,
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int32_t endIndex,
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UnicodeString &result,
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UErrorCode &status) {
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if (U_FAILURE(status)) {
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return FALSE;
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}
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for (int32_t i = beginIndex; i < endIndex;) {
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UChar32 c = s.char32At(i);
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int32_t digit = u_charDigitValue(c);
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if (digit < 0) {
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status = U_INVALID_CHAR_FOUND;
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return FALSE;
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}
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result.append(kSuperscriptDigits[digit]);
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i += U16_LENGTH(c);
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}
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return TRUE;
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}
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ScientificNumberFormatter *ScientificNumberFormatter::createSuperscriptInstance(
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DecimalFormat *fmtToAdopt, UErrorCode &status) {
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return createInstance(fmtToAdopt, new SuperscriptStyle(), status);
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}
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ScientificNumberFormatter *ScientificNumberFormatter::createSuperscriptInstance(
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const Locale &locale, UErrorCode &status) {
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return createInstance(
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static_cast<DecimalFormat *>(
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DecimalFormat::createScientificInstance(locale, status)),
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new SuperscriptStyle(),
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status);
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}
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ScientificNumberFormatter *ScientificNumberFormatter::createMarkupInstance(
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DecimalFormat *fmtToAdopt,
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const UnicodeString &beginMarkup,
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const UnicodeString &endMarkup,
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UErrorCode &status) {
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return createInstance(
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fmtToAdopt,
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new MarkupStyle(beginMarkup, endMarkup),
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status);
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}
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ScientificNumberFormatter *ScientificNumberFormatter::createMarkupInstance(
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const Locale &locale,
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const UnicodeString &beginMarkup,
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const UnicodeString &endMarkup,
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UErrorCode &status) {
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return createInstance(
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static_cast<DecimalFormat *>(
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DecimalFormat::createScientificInstance(locale, status)),
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new MarkupStyle(beginMarkup, endMarkup),
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status);
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}
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ScientificNumberFormatter *ScientificNumberFormatter::createInstance(
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DecimalFormat *fmtToAdopt,
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Style *styleToAdopt,
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UErrorCode &status) {
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LocalPointer<DecimalFormat> fmt(fmtToAdopt);
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LocalPointer<Style> style(styleToAdopt);
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if (U_FAILURE(status)) {
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return NULL;
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}
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ScientificNumberFormatter *result =
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new ScientificNumberFormatter(
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fmt.getAlias(),
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style.getAlias(),
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status);
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if (result == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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fmt.orphan();
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style.orphan();
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if (U_FAILURE(status)) {
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delete result;
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return NULL;
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}
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return result;
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}
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ScientificNumberFormatter::Style *ScientificNumberFormatter::SuperscriptStyle::clone() const {
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return new ScientificNumberFormatter::SuperscriptStyle(*this);
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}
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UnicodeString &ScientificNumberFormatter::SuperscriptStyle::format(
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const UnicodeString &original,
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FieldPositionIterator &fpi,
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const UnicodeString &preExponent,
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UnicodeString &appendTo,
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UErrorCode &status) const {
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if (U_FAILURE(status)) {
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return appendTo;
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}
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FieldPosition fp;
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int32_t copyFromOffset = 0;
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while (fpi.next(fp)) {
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switch (fp.getField()) {
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case UNUM_EXPONENT_SYMBOL_FIELD:
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appendTo.append(
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original,
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copyFromOffset,
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fp.getBeginIndex() - copyFromOffset);
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copyFromOffset = fp.getEndIndex();
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appendTo.append(preExponent);
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break;
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case UNUM_EXPONENT_SIGN_FIELD:
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{
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using namespace icu::numparse::impl;
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int32_t beginIndex = fp.getBeginIndex();
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int32_t endIndex = fp.getEndIndex();
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UChar32 aChar = original.char32At(beginIndex);
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if (unisets::get(unisets::MINUS_SIGN)->contains(aChar)) {
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appendTo.append(
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original,
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copyFromOffset,
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beginIndex - copyFromOffset);
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appendTo.append(kSuperscriptMinusSign);
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} else if (unisets::get(unisets::PLUS_SIGN)->contains(aChar)) {
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appendTo.append(
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original,
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copyFromOffset,
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beginIndex - copyFromOffset);
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appendTo.append(kSuperscriptPlusSign);
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} else {
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status = U_INVALID_CHAR_FOUND;
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return appendTo;
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}
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copyFromOffset = endIndex;
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}
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break;
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case UNUM_EXPONENT_FIELD:
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appendTo.append(
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original,
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copyFromOffset,
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fp.getBeginIndex() - copyFromOffset);
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if (!copyAsSuperscript(
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original,
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fp.getBeginIndex(),
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fp.getEndIndex(),
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appendTo,
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status)) {
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return appendTo;
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}
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copyFromOffset = fp.getEndIndex();
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break;
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default:
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break;
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}
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}
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appendTo.append(
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original, copyFromOffset, original.length() - copyFromOffset);
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return appendTo;
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}
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ScientificNumberFormatter::Style *ScientificNumberFormatter::MarkupStyle::clone() const {
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return new ScientificNumberFormatter::MarkupStyle(*this);
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}
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UnicodeString &ScientificNumberFormatter::MarkupStyle::format(
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const UnicodeString &original,
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FieldPositionIterator &fpi,
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const UnicodeString &preExponent,
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UnicodeString &appendTo,
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UErrorCode &status) const {
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if (U_FAILURE(status)) {
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return appendTo;
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}
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FieldPosition fp;
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int32_t copyFromOffset = 0;
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while (fpi.next(fp)) {
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switch (fp.getField()) {
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case UNUM_EXPONENT_SYMBOL_FIELD:
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appendTo.append(
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original,
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copyFromOffset,
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fp.getBeginIndex() - copyFromOffset);
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copyFromOffset = fp.getEndIndex();
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appendTo.append(preExponent);
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appendTo.append(fBeginMarkup);
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break;
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case UNUM_EXPONENT_FIELD:
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appendTo.append(
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original,
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copyFromOffset,
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fp.getEndIndex() - copyFromOffset);
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copyFromOffset = fp.getEndIndex();
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appendTo.append(fEndMarkup);
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break;
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default:
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break;
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}
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}
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appendTo.append(
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original, copyFromOffset, original.length() - copyFromOffset);
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return appendTo;
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}
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ScientificNumberFormatter::ScientificNumberFormatter(
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DecimalFormat *fmtToAdopt, Style *styleToAdopt, UErrorCode &status)
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: fPreExponent(),
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fDecimalFormat(fmtToAdopt),
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fStyle(styleToAdopt) {
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if (U_FAILURE(status)) {
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return;
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}
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if (fDecimalFormat == NULL || fStyle == NULL) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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const DecimalFormatSymbols *sym = fDecimalFormat->getDecimalFormatSymbols();
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if (sym == NULL) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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getPreExponent(*sym, fPreExponent);
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}
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ScientificNumberFormatter::ScientificNumberFormatter(
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const ScientificNumberFormatter &other)
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: UObject(other),
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fPreExponent(other.fPreExponent),
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fDecimalFormat(NULL),
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fStyle(NULL) {
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fDecimalFormat = static_cast<DecimalFormat *>(
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other.fDecimalFormat->clone());
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fStyle = other.fStyle->clone();
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}
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ScientificNumberFormatter::~ScientificNumberFormatter() {
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delete fDecimalFormat;
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delete fStyle;
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}
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UnicodeString &ScientificNumberFormatter::format(
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const Formattable &number,
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UnicodeString &appendTo,
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UErrorCode &status) const {
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if (U_FAILURE(status)) {
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return appendTo;
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}
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UnicodeString original;
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FieldPositionIterator fpi;
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fDecimalFormat->format(number, original, &fpi, status);
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return fStyle->format(
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original,
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fpi,
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fPreExponent,
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appendTo,
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status);
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}
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void ScientificNumberFormatter::getPreExponent(
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const DecimalFormatSymbols &dfs, UnicodeString &preExponent) {
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preExponent.append(dfs.getConstSymbol(
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DecimalFormatSymbols::kExponentMultiplicationSymbol));
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preExponent.append(dfs.getConstSymbol(DecimalFormatSymbols::kOneDigitSymbol));
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preExponent.append(dfs.getConstSymbol(DecimalFormatSymbols::kZeroDigitSymbol));
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}
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U_NAMESPACE_END
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#endif /* !UCONFIG_NO_FORMATTING */
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