1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
4 **********************************************************************
5 * Copyright (c) 2014-2016, International Business Machines
6 * Corporation and others. All Rights Reserved.
7 **********************************************************************
9 #ifndef SCINUMBERFORMATTER_H
10 #define SCINUMBERFORMATTER_H
12 #include "unicode/utypes.h"
14 #if U_SHOW_CPLUSPLUS_API
16 #if !UCONFIG_NO_FORMATTING
19 #include "unicode/unistr.h"
23 * \brief C++ API: Formats in scientific notation.
28 class FieldPositionIterator;
29 class DecimalFormatSymbols;
34 * A formatter that formats numbers in user-friendly scientific notation.
38 * UErrorCode status = U_ZERO_ERROR;
39 * LocalPointer<ScientificNumberFormatter> fmt(
40 * ScientificNumberFormatter::createMarkupInstance(
41 * "en", "<sup>", "</sup>", status));
42 * if (U_FAILURE(status)) {
45 * UnicodeString appendTo;
46 * // appendTo = "1.23456x10<sup>-78</sup>"
47 * fmt->format(1.23456e-78, appendTo, status);
52 class U_I18N_API ScientificNumberFormatter : public UObject {
56 * Creates a ScientificNumberFormatter instance that uses
57 * superscript characters for exponents.
58 * @param fmtToAdopt The DecimalFormat which must be configured for
59 * scientific notation.
60 * @param status error returned here.
61 * @return The new ScientificNumberFormatter instance.
65 static ScientificNumberFormatter *createSuperscriptInstance(
66 DecimalFormat *fmtToAdopt, UErrorCode &status);
69 * Creates a ScientificNumberFormatter instance that uses
70 * superscript characters for exponents for this locale.
71 * @param locale The locale
72 * @param status error returned here.
73 * @return The ScientificNumberFormatter instance.
77 static ScientificNumberFormatter *createSuperscriptInstance(
78 const Locale &locale, UErrorCode &status);
82 * Creates a ScientificNumberFormatter instance that uses
83 * markup for exponents.
84 * @param fmtToAdopt The DecimalFormat which must be configured for
85 * scientific notation.
86 * @param beginMarkup the markup to start superscript.
87 * @param endMarkup the markup to end superscript.
88 * @param status error returned here.
89 * @return The new ScientificNumberFormatter instance.
93 static ScientificNumberFormatter *createMarkupInstance(
94 DecimalFormat *fmtToAdopt,
95 const UnicodeString &beginMarkup,
96 const UnicodeString &endMarkup,
100 * Creates a ScientificNumberFormatter instance that uses
101 * markup for exponents for this locale.
102 * @param locale The locale
103 * @param beginMarkup the markup to start superscript.
104 * @param endMarkup the markup to end superscript.
105 * @param status error returned here.
106 * @return The ScientificNumberFormatter instance.
110 static ScientificNumberFormatter *createMarkupInstance(
111 const Locale &locale,
112 const UnicodeString &beginMarkup,
113 const UnicodeString &endMarkup,
118 * Returns a copy of this object. Caller must free returned copy.
121 ScientificNumberFormatter *clone() const {
122 return new ScientificNumberFormatter(*this);
129 virtual ~ScientificNumberFormatter();
132 * Formats a number into user friendly scientific notation.
134 * @param number the number to format.
135 * @param appendTo formatted string appended here.
136 * @param status any error returned here.
141 UnicodeString &format(
142 const Formattable &number,
143 UnicodeString &appendTo,
144 UErrorCode &status) const;
146 class U_I18N_API Style : public UObject {
148 virtual Style *clone() const = 0;
150 virtual UnicodeString &format(
151 const UnicodeString &original,
152 FieldPositionIterator &fpi,
153 const UnicodeString &preExponent,
154 UnicodeString &appendTo,
155 UErrorCode &status) const = 0;
157 friend class ScientificNumberFormatter;
160 class U_I18N_API SuperscriptStyle : public Style {
162 virtual SuperscriptStyle *clone() const override;
164 virtual UnicodeString &format(
165 const UnicodeString &original,
166 FieldPositionIterator &fpi,
167 const UnicodeString &preExponent,
168 UnicodeString &appendTo,
169 UErrorCode &status) const override;
172 class U_I18N_API MarkupStyle : public Style {
175 const UnicodeString &beginMarkup,
176 const UnicodeString &endMarkup)
178 fBeginMarkup(beginMarkup),
179 fEndMarkup(endMarkup) { }
180 virtual MarkupStyle *clone() const override;
182 virtual UnicodeString &format(
183 const UnicodeString &original,
184 FieldPositionIterator &fpi,
185 const UnicodeString &preExponent,
186 UnicodeString &appendTo,
187 UErrorCode &status) const override;
189 UnicodeString fBeginMarkup;
190 UnicodeString fEndMarkup;
193 ScientificNumberFormatter(
194 DecimalFormat *fmtToAdopt,
198 ScientificNumberFormatter(const ScientificNumberFormatter &other);
199 ScientificNumberFormatter &operator=(const ScientificNumberFormatter &);
201 static void getPreExponent(
202 const DecimalFormatSymbols &dfs, UnicodeString &preExponent);
204 static ScientificNumberFormatter *createInstance(
205 DecimalFormat *fmtToAdopt,
209 UnicodeString fPreExponent;
210 DecimalFormat *fDecimalFormat;
218 #endif /* !UCONFIG_NO_FORMATTING */
220 #endif /* U_SHOW_CPLUSPLUS_API */