DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Mercurial (a25f12b76a38)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305
// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
*   Copyright (C) 2012-2016, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*   file name:  listformatter.h
*   encoding:   UTF-8
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 20120426
*   created by: Umesh P. Nair
*/

#ifndef __LISTFORMATTER_H__
#define __LISTFORMATTER_H__

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/unistr.h"
#include "unicode/locid.h"
#include "unicode/formattedvalue.h"

U_NAMESPACE_BEGIN

class FieldPositionIterator;
class FieldPositionHandler;
class FormattedListData;
class ListFormatter;

/** @internal */
class Hashtable;

/** @internal */
struct ListFormatInternal;

/* The following can't be #ifndef U_HIDE_INTERNAL_API, needed for other .h file declarations */
/**
 * @internal
 * \cond
 */
struct ListFormatData : public UMemory {
    UnicodeString twoPattern;
    UnicodeString startPattern;
    UnicodeString middlePattern;
    UnicodeString endPattern;

  ListFormatData(const UnicodeString& two, const UnicodeString& start, const UnicodeString& middle, const UnicodeString& end) :
      twoPattern(two), startPattern(start), middlePattern(middle), endPattern(end) {}
};
/** \endcond */


/**
 * \file
 * \brief C++ API: API for formatting a list.
 */


#if !UCONFIG_NO_FORMATTING
#ifndef U_HIDE_DRAFT_API
/**
 * An immutable class containing the result of a list formatting operation.
 *
 * Instances of this class are immutable and thread-safe.
 *
 * When calling nextPosition():
 * The fields are returned from start to end. The special field category
 * UFIELD_CATEGORY_LIST_SPAN is used to indicate which argument
 * was inserted at the given position. The span category will
 * always occur before the corresponding instance of UFIELD_CATEGORY_LIST
 * in the nextPosition() iterator.
 *
 * Not intended for public subclassing.
 *
 * @draft ICU 64
 */
class U_I18N_API FormattedList : public UMemory, public FormattedValue {
  public:
    /**
     * Default constructor; makes an empty FormattedList.
     * @draft ICU 64
     */
    FormattedList() : fData(nullptr), fErrorCode(U_INVALID_STATE_ERROR) {}

    /**
     * Move constructor: Leaves the source FormattedList in an undefined state.
     * @draft ICU 64
     */
    FormattedList(FormattedList&& src) U_NOEXCEPT;

    /**
     * Destruct an instance of FormattedList.
     * @draft ICU 64
     */
    virtual ~FormattedList() U_OVERRIDE;

    /** Copying not supported; use move constructor instead. */
    FormattedList(const FormattedList&) = delete;

    /** Copying not supported; use move assignment instead. */
    FormattedList& operator=(const FormattedList&) = delete;

    /**
     * Move assignment: Leaves the source FormattedList in an undefined state.
     * @draft ICU 64
     */
    FormattedList& operator=(FormattedList&& src) U_NOEXCEPT;

    /** @copydoc FormattedValue::toString() */
    UnicodeString toString(UErrorCode& status) const U_OVERRIDE;

    /** @copydoc FormattedValue::toTempString() */
    UnicodeString toTempString(UErrorCode& status) const U_OVERRIDE;

    /** @copydoc FormattedValue::appendTo() */
    Appendable &appendTo(Appendable& appendable, UErrorCode& status) const U_OVERRIDE;

    /** @copydoc FormattedValue::nextPosition() */
    UBool nextPosition(ConstrainedFieldPosition& cfpos, UErrorCode& status) const U_OVERRIDE;

  private:
    FormattedListData *fData;
    UErrorCode fErrorCode;
    explicit FormattedList(FormattedListData *results)
        : fData(results), fErrorCode(U_ZERO_ERROR) {}
    explicit FormattedList(UErrorCode errorCode)
        : fData(nullptr), fErrorCode(errorCode) {}
    friend class ListFormatter;
};
#endif /* U_HIDE_DRAFT_API */
#endif // !UCONFIG_NO_FORMATTING


/**
 * An immutable class for formatting a list, using data from CLDR (or supplied
 * separately).
 *
 * Example: Input data ["Alice", "Bob", "Charlie", "Delta"] will be formatted
 * as "Alice, Bob, Charlie and Delta" in English.
 *
 * The ListFormatter class is not intended for public subclassing.
 * @stable ICU 50
 */
class U_I18N_API ListFormatter : public UObject{

  public:

    /**
     * Copy constructor.
     * @stable ICU 52
     */
    ListFormatter(const ListFormatter&);

    /**
     * Assignment operator.
     * @stable ICU 52
     */
    ListFormatter& operator=(const ListFormatter& other);

    /**
     * Creates a ListFormatter appropriate for the default locale.
     *
     * @param errorCode ICU error code, set if no data available for default locale.
     * @return Pointer to a ListFormatter object for the default locale,
     *     created from internal data derived from CLDR data.
     * @stable ICU 50
     */
    static ListFormatter* createInstance(UErrorCode& errorCode);

    /**
     * Creates a ListFormatter appropriate for a locale.
     *
     * @param locale The locale.
     * @param errorCode ICU error code, set if no data available for the given locale.
     * @return A ListFormatter object created from internal data derived from
     *     CLDR data.
     * @stable ICU 50
     */
    static ListFormatter* createInstance(const Locale& locale, UErrorCode& errorCode);

#ifndef U_HIDE_INTERNAL_API
    /**
     * Creates a ListFormatter appropriate for a locale and style.
     *
     * @param locale The locale.
     * @param style the style, either "standard", "or", "unit", "unit-narrow", or "unit-short"
     * @param errorCode ICU error code, set if no data available for the given locale.
     * @return A ListFormatter object created from internal data derived from
     *     CLDR data.
     * @internal
     */
    static ListFormatter* createInstance(const Locale& locale, const char* style, UErrorCode& errorCode);
#endif  /* U_HIDE_INTERNAL_API */

    /**
     * Destructor.
     *
     * @stable ICU 50
     */
    virtual ~ListFormatter();


    /**
     * Formats a list of strings.
     *
     * @param items An array of strings to be combined and formatted.
     * @param n_items Length of the array items.
     * @param appendTo The string to which the result should be appended to.
     * @param errorCode ICU error code, set if there is an error.
     * @return Formatted string combining the elements of items, appended to appendTo.
     * @stable ICU 50
     */
    UnicodeString& format(const UnicodeString items[], int32_t n_items,
        UnicodeString& appendTo, UErrorCode& errorCode) const;

#ifndef U_HIDE_DRAFT_API
    /**
     * Format a list of strings.
     *
     * @param items     An array of strings to be combined and formatted.
     * @param n_items   Length of the array items.
     * @param appendTo  The string to which the formatted result will be
     *                  appended.
     * @param posIter   On return, can be used to iterate over positions of
     *                  fields generated by this format call. Field values are
     *                  defined in UListFormatterField. Can be NULL.
     * @param errorCode ICU error code returned here.
     * @return          Formatted string combining the elements of items,
     *                  appended to appendTo.
     * @draft ICU 63
     */
    UnicodeString& format(const UnicodeString items[], int32_t n_items,
        UnicodeString & appendTo, FieldPositionIterator* posIter,
        UErrorCode& errorCode) const;
#endif // U_HIDE_DRAFT_API

#if !UCONFIG_NO_FORMATTING
#ifndef U_HIDE_DRAFT_API
    /**
     * Formats a list of strings to a FormattedList, which exposes field
     * position information. The FormattedList contains more information than
     * a FieldPositionIterator.
     *
     * @param items     An array of strings to be combined and formatted.
     * @param n_items   Length of the array items.
     * @param errorCode ICU error code returned here.
     * @return          A FormattedList containing field information.
     * @draft ICU 64
     */
    FormattedList formatStringsToValue(
        const UnicodeString items[],
        int32_t n_items,
        UErrorCode& errorCode) const;
#endif  /* U_HIDE_DRAFT_API */
#endif // !UCONFIG_NO_FORMATTING

#ifndef U_HIDE_INTERNAL_API
    /**
      @internal for MeasureFormat
    */
    UnicodeString& format(
            const UnicodeString items[],
            int32_t n_items,
            UnicodeString& appendTo,
            int32_t index,
            int32_t &offset,
            UErrorCode& errorCode) const;
    /**
     * @internal constructor made public for testing.
     */
    ListFormatter(const ListFormatData &data, UErrorCode &errorCode);
    /**
     * @internal constructor made public for testing.
     */
    ListFormatter(const ListFormatInternal* listFormatterInternal);
#endif  /* U_HIDE_INTERNAL_API */

  private:
    static void initializeHash(UErrorCode& errorCode);
    static const ListFormatInternal* getListFormatInternal(const Locale& locale, const char *style, UErrorCode& errorCode);
    struct ListPatternsSink;
    static ListFormatInternal* loadListFormatInternal(const Locale& locale, const char* style, UErrorCode& errorCode);

    UnicodeString& format_(
        const UnicodeString items[], int32_t n_items, UnicodeString& appendTo,
        int32_t index, int32_t &offset, FieldPositionHandler* handler, UErrorCode& errorCode) const;

    ListFormatter();

    ListFormatInternal* owned;
    const ListFormatInternal* data;
};

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif // __LISTFORMATTER_H__