Update ICU to 54.1 step 1

source/i18n/unicode/reldatefmt.h

Index: source/i18n/unicode/reldatefmt.h
diff --git a/source/i18n/unicode/reldatefmt.h b/source/i18n/unicode/reldatefmt.h
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+++ b/source/i18n/unicode/reldatefmt.h
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+/*
+*****************************************************************************
+* Copyright (C) 2014, International Business Machines Corporation and
+* others.
+* All Rights Reserved.
+*****************************************************************************
+*
+* File RELDATEFMT.H
+*****************************************************************************
+*/
+
+#ifndef __RELDATEFMT_H
+#define __RELDATEFMT_H
+
+#include "unicode/utypes.h"
+#include "unicode/uobject.h"
+#include "unicode/udisplaycontext.h"
+#include "unicode/locid.h"
+
+/**
+ * \file
+ * \brief C++ API: Formats relative dates such as "1 day ago" or "tomorrow"
+ */
+
+#if !UCONFIG_NO_FORMATTING && !UCONFIG_NO_BREAK_ITERATION
+
+#ifndef U_HIDE_DRAFT_API
+
+/**
+ * The formatting style
+ * @draft ICU 54
+ */
+typedef enum UDateRelativeDateTimeFormatterStyle {
+
+  /**
+   * Everything spelled out.
+   * @draft ICU 54
+   */
+  UDAT_STYLE_LONG,
+
+  /**
+   * Abbreviations used when possible.
+   * @draft ICU 54
+   */
+  UDAT_STYLE_SHORT,
+
+  /**
+   * Use the shortest possible form.
+   * @draft ICU 54
+   */
+  UDAT_STYLE_NARROW,
+
+  /**
+   * The number of styles.
+   * @draft ICU 54
+   */
+  UDAT_STYLE_COUNT
+} UDateRelativeDateTimeFormatterStyle; 
+
+/**
+ * Represents the unit for formatting a relative date. e.g "in 5 days"
+ * or "in 3 months"
+ * @draft ICU 53
+ */
+typedef enum UDateRelativeUnit {
+
+    /**
+     * Seconds
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_SECONDS,
+
+    /**
+     * Minutes
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_MINUTES,
+
+    /**
+     * Hours
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_HOURS,
+
+    /**
+     * Days
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_DAYS,
+
+    /**
+     * Weeks
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_WEEKS,
+
+    /**
+     * Months
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_MONTHS,
+
+    /**
+     * Years
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_YEARS,
+
+    /**
+     * Count of items in this enum.
+     * @draft ICU 53
+     */
+    UDAT_RELATIVE_UNIT_COUNT
+} UDateRelativeUnit;
+
+/**
+ * Represents an absolute unit.
+ * @draft ICU 53
+ */
+typedef enum UDateAbsoluteUnit {
+
+    // Days of week have to remain together and in order from Sunday to
+    // Saturday.
+    /**
+     * Sunday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_SUNDAY,
+
+    /**
+     * Monday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_MONDAY,
+
+    /**
+     * Tuesday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_TUESDAY,
+
+    /**
+     * Wednesday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_WEDNESDAY,
+
+    /**
+     * Thursday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_THURSDAY,
+
+    /**
+     * Friday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_FRIDAY,
+
+    /**
+     * Saturday
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_SATURDAY,
+
+    /**
+     * Day
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_DAY,
+
+    /**
+     * Week
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_WEEK,
+
+    /**
+     * Month
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_MONTH,
+
+    /**
+     * Year
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_YEAR,
+
+    /**
+     * Now
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_NOW,
+
+    /**
+     * Count of items in this enum.
+     * @draft ICU 53
+     */
+    UDAT_ABSOLUTE_UNIT_COUNT
+} UDateAbsoluteUnit;
+
+/**
+ * Represents a direction for an absolute unit e.g "Next Tuesday"
+ * or "Last Tuesday"
+ * @draft ICU 53
+ */
+typedef enum UDateDirection {
+
+    /**
+     * Two before. Not fully supported in every locale.
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_LAST_2,
+
+    /**
+     * Last
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_LAST,
+
+    /**
+     * This
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_THIS,
+
+    /**
+     * Next
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_NEXT,
+
+    /**
+     * Two after. Not fully supported in every locale.
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_NEXT_2,
+
+    /**
+     * Plain, which means the absence of a qualifier.
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_PLAIN,
+
+    /**
+     * Count of items in this enum.
+     * @draft ICU 53
+     */
+    UDAT_DIRECTION_COUNT
+} UDateDirection;
+
+
+U_NAMESPACE_BEGIN
+
+class RelativeDateTimeCacheData;
+class SharedNumberFormat;
+class SharedPluralRules;
+class SharedBreakIterator;
+class NumberFormat;
+class UnicodeString;
+
+/**
+ * Formats simple relative dates. There are two types of relative dates that
+ * it handles:
+ * <ul>
+ *   <li>relative dates with a quantity e.g "in 5 days"</li>
+ *   <li>relative dates without a quantity e.g "next Tuesday"</li>
+ * </ul>
+ * <p>
+ * This API is very basic and is intended to be a building block for more
+ * fancy APIs. The caller tells it exactly what to display in a locale
+ * independent way. While this class automatically provides the correct plural
+ * forms, the grammatical form is otherwise as neutral as possible. It is the
+ * caller's responsibility to handle cut-off logic such as deciding between
+ * displaying "in 7 days" or "in 1 week." This API supports relative dates
+ * involving one single unit. This API does not support relative dates
+ * involving compound units,
+ * e.g "in 5 days and 4 hours" nor does it support parsing.
+ * <p>
+ * This class is mostly thread safe and immutable with the following caveats:
+ * 1. The assignment operator violates Immutability. It must not be used
+ *    concurrently with other operations.
+ * 2. Caller must not hold onto adopted pointers.
+ * <p>
+ * This class is not intended for public subclassing.
+ * <p>
+ * Here are some examples of use:
+ * <blockquote>
+ * <pre>
+ * UErrorCode status = U_ZERO_ERROR;
+ * UnicodeString appendTo;
+ * RelativeDateTimeFormatter fmt(status);
+ * // Appends "in 1 day"
+ * fmt.format(
+ *     1, UDAT_DIRECTION_NEXT, UDAT_RELATIVE_DAYS, appendTo, status);
+ * // Appends "in 3 days"
+ * fmt.format(
+ *     3, UDAT_DIRECTION_NEXT, UDAT_RELATIVE_DAYS, appendTo, status);
+ * // Appends "3.2 years ago"
+ * fmt.format(
+ *     3.2, UDAT_DIRECTION_LAST, UDAT_RELATIVE_YEARS, appendTo, status);
+ * // Appends "last Sunday"
+ * fmt.format(UDAT_DIRECTION_LAST, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
+ * // Appends "this Sunday"
+ * fmt.format(UDAT_DIRECTION_THIS, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
+ * // Appends "next Sunday"
+ * fmt.format(UDAT_DIRECTION_NEXT, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
+ * // Appends "Sunday"
+ * fmt.format(UDAT_DIRECTION_PLAIN, UDAT_ABSOLUTE_SUNDAY, appendTo, status);
+ *
+ * // Appends "yesterday"
+ * fmt.format(UDAT_DIRECTION_LAST, UDAT_ABSOLUTE_DAY, appendTo, status);
+ * // Appends "today"
+ * fmt.format(UDAT_DIRECTION_THIS, UDAT_ABSOLUTE_DAY, appendTo, status);
+ * // Appends "tomorrow"
+ * fmt.format(UDAT_DIRECTION_NEXT, UDAT_ABSOLUTE_DAY, appendTo, status);
+ * // Appends "now"
+ * fmt.format(UDAT_DIRECTION_PLAIN, UDAT_ABSOLUTE_NOW, appendTo, status);
+ *
+ * </pre>
+ * </blockquote>
+ * <p>
+ * In the future, we may add more forms, such as abbreviated/short forms
+ * (3 secs ago), and relative day periods ("yesterday afternoon"), etc.
+ *
+ * The RelativeDateTimeFormatter class is not intended for public subclassing.
+ *
+ * @draft ICU 53
+ */
+class U_I18N_API RelativeDateTimeFormatter : public UObject {
+public:
+
+    /**
+     * Create RelativeDateTimeFormatter with default locale.
+     * @draft ICU 53
+     */
+    RelativeDateTimeFormatter(UErrorCode& status);
+
+    /**
+     * Create RelativeDateTimeFormatter with given locale.
+     * @draft ICU 53
+     */
+    RelativeDateTimeFormatter(const Locale& locale, UErrorCode& status);
+
+    /**
+     * Create RelativeDateTimeFormatter with given locale and NumberFormat.
+     *
+     * @param locale the locale
+     * @param nfToAdopt Constructed object takes ownership of this pointer.
+     *   It is an error for caller to delete this pointer or change its
+     *   contents after calling this constructor.
+     * @status Any error is returned here.
+     * @draft ICU 53
+     */
+    RelativeDateTimeFormatter(
+        const Locale& locale, NumberFormat *nfToAdopt, UErrorCode& status);
+
+    /**
+     * Create RelativeDateTimeFormatter with given locale, NumberFormat,
+     * and capitalization context.
+     *
+     * @param locale the locale
+     * @param nfToAdopt Constructed object takes ownership of this pointer.
+     *   It is an error for caller to delete this pointer or change its
+     *   contents after calling this constructor. Caller may pass NULL for
+     *   this argument if they want default number format behavior.
+     * @param style the format style. The UDAT_RELATIVE bit field has no effect.
+     * @param capitalizationContext A value from UDisplayContext that pertains to
+     * capitalization.
+     * @status Any error is returned here. 
+     * @draft ICU 54
+     */
+    RelativeDateTimeFormatter(
+            const Locale& locale,
+            NumberFormat *nfToAdopt,
+            UDateRelativeDateTimeFormatterStyle style,
+            UDisplayContext capitalizationContext,
+            UErrorCode& status);
+
+    /**
+     * Copy constructor.
+     * @draft ICU 53
+     */
+    RelativeDateTimeFormatter(const RelativeDateTimeFormatter& other);
+
+    /**
+     * Assignment operator.
+     * @draft ICU 53
+     */
+    RelativeDateTimeFormatter& operator=(
+            const RelativeDateTimeFormatter& other);
+
+    /**
+     * Destructor.
+     * @draft ICU 53
+     */
+    virtual ~RelativeDateTimeFormatter();
+
+    /**
+     * Formats a relative date with a quantity such as "in 5 days" or
+     * "3 months ago"
+     * @param quantity The numerical amount e.g 5. This value is formatted
+     * according to this object's NumberFormat object.
+     * @param direction NEXT means a future relative date; LAST means a past
+     * relative date. If direction is anything else, this method sets
+     * status to U_ILLEGAL_ARGUMENT_ERROR.
+     * @param unit the unit e.g day? month? year?
+     * @param appendTo The string to which the formatted result will be
+     *  appended
+     * @param status ICU error code returned here.
+     * @return appendTo
+     * @draft ICU 53
+     */
+    UnicodeString& format(
+            double quantity,
+            UDateDirection direction,
+            UDateRelativeUnit unit,
+            UnicodeString& appendTo,
+            UErrorCode& status) const;
+
+    /**
+     * Formats a relative date without a quantity.
+     * @param direction NEXT, LAST, THIS, etc.
+     * @param unit e.g SATURDAY, DAY, MONTH
+     * @param appendTo The string to which the formatted result will be
+     *  appended. If the value of direction is documented as not being fully
+     *  supported in all locales then this method leaves appendTo unchanged if
+     *  no format string is available.
+     * @param status ICU error code returned here.
+     * @return appendTo
+     * @draft ICU 53
+     */
+    UnicodeString& format(
+            UDateDirection direction,
+            UDateAbsoluteUnit unit,
+            UnicodeString& appendTo,
+            UErrorCode& status) const;
+
+    /**
+     * Combines a relative date string and a time string in this object's
+     * locale. This is done with the same date-time separator used for the
+     * default calendar in this locale.
+     *
+     * @param relativeDateString the relative date, e.g 'yesterday'
+     * @param timeString the time e.g '3:45'
+     * @param appendTo concatenated date and time appended here
+     * @param status ICU error code returned here.
+     * @return appendTo
+     * @draft ICU 53
+     */
+    UnicodeString& combineDateAndTime(
+            const UnicodeString& relativeDateString,
+            const UnicodeString& timeString,
+            UnicodeString& appendTo,
+            UErrorCode& status) const;
+
+    /**
+     * Returns the NumberFormat this object is using.
+     *
+     * @draft ICU 53
+     */
+    const NumberFormat& getNumberFormat() const;
+
+    /**
+     * Returns the capitalization context.
+     *
+     * @draft ICU 54
+     */
+    UDisplayContext getCapitalizationContext() const;
+
+    /**
+     * Returns the format style.
+     *
+     * @draft ICU 54
+     */
+    UDateRelativeDateTimeFormatterStyle getFormatStyle() const;
+private:
+    const RelativeDateTimeCacheData* fCache;
+    const SharedNumberFormat *fNumberFormat;
+    const SharedPluralRules *fPluralRules;
+    UDateRelativeDateTimeFormatterStyle fStyle;
+    UDisplayContext fContext;
+    const SharedBreakIterator *fOptBreakIterator;
+    Locale fLocale;
+    void init(
+            NumberFormat *nfToAdopt,
+            BreakIterator *brkIter,
+            UErrorCode &status);
+    void adjustForContext(UnicodeString &) const;
+};
+
+U_NAMESPACE_END
+
+#endif /* U_HIDE_DRAFT_API */
+
+#endif /* !UCONFIG_NO_FORMATTING && !UCONFIG_NO_BREAK_ITERATION*/
+#endif