517 lines
18 KiB
C++
517 lines
18 KiB
C++
/*
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*******************************************************************************
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* Copyright (C) 2007-2012, International Business Machines Corporation and
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* 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 <stdlib.h>
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#include "reldtfmt.h"
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#include "unicode/datefmt.h"
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#include "unicode/smpdtfmt.h"
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#include "unicode/msgfmt.h"
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#include "gregoimp.h" // for CalendarData
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#include "cmemory.h"
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U_NAMESPACE_BEGIN
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/**
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* An array of URelativeString structs is used to store the resource data loaded out of the bundle.
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*/
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struct URelativeString {
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int32_t offset; /** offset of this item, such as, the relative date **/
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int32_t len; /** length of the string **/
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const UChar* string; /** string, or NULL if not set **/
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};
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static const char DT_DateTimePatternsTag[]="DateTimePatterns";
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RelativeDateFormat)
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RelativeDateFormat::RelativeDateFormat(const RelativeDateFormat& other) :
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DateFormat(other), fDateTimeFormatter(NULL), fDatePattern(other.fDatePattern),
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fTimePattern(other.fTimePattern), fCombinedFormat(NULL),
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fDateStyle(other.fDateStyle), fLocale(other.fLocale),
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fDayMin(other.fDayMin), fDayMax(other.fDayMax),
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fDatesLen(other.fDatesLen), fDates(NULL)
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{
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if(other.fDateTimeFormatter != NULL) {
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fDateTimeFormatter = (SimpleDateFormat*)other.fDateTimeFormatter->clone();
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}
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if(other.fCombinedFormat != NULL) {
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fCombinedFormat = (MessageFormat*)other.fCombinedFormat->clone();
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}
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if (fDatesLen > 0) {
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fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);
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uprv_memcpy(fDates, other.fDates, sizeof(fDates[0])*fDatesLen);
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}
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}
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RelativeDateFormat::RelativeDateFormat( UDateFormatStyle timeStyle, UDateFormatStyle dateStyle,
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const Locale& locale, UErrorCode& status) :
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DateFormat(), fDateTimeFormatter(NULL), fDatePattern(), fTimePattern(), fCombinedFormat(NULL),
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fDateStyle(dateStyle), fLocale(locale), fDatesLen(0), fDates(NULL)
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{
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if(U_FAILURE(status) ) {
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return;
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}
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if (timeStyle < UDAT_NONE || timeStyle > UDAT_SHORT) {
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// don't support other time styles (e.g. relative styles), for now
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return;
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}
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UDateFormatStyle baseDateStyle = (dateStyle > UDAT_SHORT)? (UDateFormatStyle)(dateStyle & ~UDAT_RELATIVE): dateStyle;
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DateFormat * df;
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// Get fDateTimeFormatter from either date or time style (does not matter, we will override the pattern).
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// We do need to get separate patterns for the date & time styles.
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if (baseDateStyle != UDAT_NONE) {
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df = createDateInstance((EStyle)baseDateStyle, locale);
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fDateTimeFormatter=dynamic_cast<SimpleDateFormat *>(df);
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if (fDateTimeFormatter == NULL) {
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status = U_UNSUPPORTED_ERROR;
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return;
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}
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fDateTimeFormatter->toPattern(fDatePattern);
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if (timeStyle != UDAT_NONE) {
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df = createTimeInstance((EStyle)timeStyle, locale);
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SimpleDateFormat *sdf = dynamic_cast<SimpleDateFormat *>(df);
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if (sdf != NULL) {
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sdf->toPattern(fTimePattern);
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delete sdf;
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}
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}
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} else {
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// does not matter whether timeStyle is UDAT_NONE, we need something for fDateTimeFormatter
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df = createTimeInstance((EStyle)timeStyle, locale);
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fDateTimeFormatter=dynamic_cast<SimpleDateFormat *>(df);
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if (fDateTimeFormatter == NULL) {
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status = U_UNSUPPORTED_ERROR;
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return;
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}
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fDateTimeFormatter->toPattern(fTimePattern);
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}
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// Initialize the parent fCalendar, so that parse() works correctly.
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initializeCalendar(NULL, locale, status);
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loadDates(status);
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}
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RelativeDateFormat::~RelativeDateFormat() {
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delete fDateTimeFormatter;
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delete fCombinedFormat;
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uprv_free(fDates);
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}
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Format* RelativeDateFormat::clone(void) const {
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return new RelativeDateFormat(*this);
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}
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UBool RelativeDateFormat::operator==(const Format& other) const {
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if(DateFormat::operator==(other)) {
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// DateFormat::operator== guarantees following cast is safe
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RelativeDateFormat* that = (RelativeDateFormat*)&other;
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return (fDateStyle==that->fDateStyle &&
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fDatePattern==that->fDatePattern &&
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fTimePattern==that->fTimePattern &&
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fLocale==that->fLocale);
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}
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return FALSE;
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}
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static const UChar APOSTROPHE = (UChar)0x0027;
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UnicodeString& RelativeDateFormat::format( Calendar& cal,
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UnicodeString& appendTo,
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FieldPosition& pos) const {
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UErrorCode status = U_ZERO_ERROR;
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UnicodeString relativeDayString;
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// calculate the difference, in days, between 'cal' and now.
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int dayDiff = dayDifference(cal, status);
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// look up string
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int32_t len = 0;
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const UChar *theString = getStringForDay(dayDiff, len, status);
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if(U_SUCCESS(status) && (theString!=NULL)) {
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// found a relative string
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relativeDayString.setTo(theString, len);
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}
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if (fDatePattern.isEmpty()) {
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fDateTimeFormatter->applyPattern(fTimePattern);
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fDateTimeFormatter->format(cal,appendTo,pos);
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} else if (fTimePattern.isEmpty() || fCombinedFormat == NULL) {
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if (relativeDayString.length() > 0) {
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appendTo.append(relativeDayString);
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} else {
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fDateTimeFormatter->applyPattern(fDatePattern);
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fDateTimeFormatter->format(cal,appendTo,pos);
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}
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} else {
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UnicodeString datePattern;
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if (relativeDayString.length() > 0) {
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// Need to quote the relativeDayString to make it a legal date pattern
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relativeDayString.findAndReplace(UNICODE_STRING("'", 1), UNICODE_STRING("''", 2)); // double any existing APOSTROPHE
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relativeDayString.insert(0, APOSTROPHE); // add APOSTROPHE at beginning...
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relativeDayString.append(APOSTROPHE); // and at end
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datePattern.setTo(relativeDayString);
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} else {
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datePattern.setTo(fDatePattern);
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}
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UnicodeString combinedPattern;
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Formattable timeDatePatterns[] = { fTimePattern, datePattern };
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fCombinedFormat->format(timeDatePatterns, 2, combinedPattern, pos, status); // pos is ignored by this
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fDateTimeFormatter->applyPattern(combinedPattern);
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fDateTimeFormatter->format(cal,appendTo,pos);
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}
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return appendTo;
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}
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UnicodeString&
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RelativeDateFormat::format(const Formattable& obj,
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UnicodeString& appendTo,
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FieldPosition& pos,
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UErrorCode& status) const
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{
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// this is just here to get around the hiding problem
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// (the previous format() override would hide the version of
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// format() on DateFormat that this function correspond to, so we
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// have to redefine it here)
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return DateFormat::format(obj, appendTo, pos, status);
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}
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void RelativeDateFormat::parse( const UnicodeString& text,
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Calendar& cal,
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ParsePosition& pos) const {
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int32_t startIndex = pos.getIndex();
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if (fDatePattern.isEmpty()) {
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// no date pattern, try parsing as time
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fDateTimeFormatter->applyPattern(fTimePattern);
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fDateTimeFormatter->parse(text,cal,pos);
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} else if (fTimePattern.isEmpty() || fCombinedFormat == NULL) {
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// no time pattern or way to combine, try parsing as date
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// first check whether text matches a relativeDayString
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UBool matchedRelative = FALSE;
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for (int n=0; n < fDatesLen && !matchedRelative; n++) {
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if (fDates[n].string != NULL &&
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text.compare(startIndex, fDates[n].len, fDates[n].string) == 0) {
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// it matched, handle the relative day string
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UErrorCode status = U_ZERO_ERROR;
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matchedRelative = TRUE;
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// Set the calendar to now+offset
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cal.setTime(Calendar::getNow(),status);
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cal.add(UCAL_DATE,fDates[n].offset, status);
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if(U_FAILURE(status)) {
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// failure in setting calendar field, set offset to beginning of rel day string
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pos.setErrorIndex(startIndex);
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} else {
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pos.setIndex(startIndex + fDates[n].len);
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}
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}
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}
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if (!matchedRelative) {
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// just parse as normal date
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fDateTimeFormatter->applyPattern(fDatePattern);
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fDateTimeFormatter->parse(text,cal,pos);
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}
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} else {
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// Here we replace any relativeDayString in text with the equivalent date
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// formatted per fDatePattern, then parse text normally using the combined pattern.
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UnicodeString modifiedText(text);
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FieldPosition fPos;
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int32_t dateStart = 0, origDateLen = 0, modDateLen = 0;
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UErrorCode status = U_ZERO_ERROR;
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for (int n=0; n < fDatesLen; n++) {
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int32_t relativeStringOffset;
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if (fDates[n].string != NULL &&
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(relativeStringOffset = modifiedText.indexOf(fDates[n].string, fDates[n].len, startIndex)) >= startIndex) {
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// it matched, replace the relative date with a real one for parsing
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UnicodeString dateString;
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Calendar * tempCal = cal.clone();
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// Set the calendar to now+offset
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tempCal->setTime(Calendar::getNow(),status);
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tempCal->add(UCAL_DATE,fDates[n].offset, status);
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if(U_FAILURE(status)) {
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pos.setErrorIndex(startIndex);
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delete tempCal;
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return;
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}
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fDateTimeFormatter->applyPattern(fDatePattern);
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fDateTimeFormatter->format(*tempCal, dateString, fPos);
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dateStart = relativeStringOffset;
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origDateLen = fDates[n].len;
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modDateLen = dateString.length();
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modifiedText.replace(dateStart, origDateLen, dateString);
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delete tempCal;
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break;
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}
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}
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UnicodeString combinedPattern;
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Formattable timeDatePatterns[] = { fTimePattern, fDatePattern };
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fCombinedFormat->format(timeDatePatterns, 2, combinedPattern, fPos, status); // pos is ignored by this
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fDateTimeFormatter->applyPattern(combinedPattern);
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fDateTimeFormatter->parse(modifiedText,cal,pos);
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// Adjust offsets
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UBool noError = (pos.getErrorIndex() < 0);
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int32_t offset = (noError)? pos.getIndex(): pos.getErrorIndex();
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if (offset >= dateStart + modDateLen) {
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// offset at or after the end of the replaced text,
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// correct by the difference between original and replacement
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offset -= (modDateLen - origDateLen);
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} else if (offset >= dateStart) {
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// offset in the replaced text, set it to the beginning of that text
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// (i.e. the beginning of the relative day string)
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offset = dateStart;
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}
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if (noError) {
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pos.setIndex(offset);
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} else {
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pos.setErrorIndex(offset);
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}
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}
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}
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UDate
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RelativeDateFormat::parse( const UnicodeString& text,
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ParsePosition& pos) const {
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// redefined here because the other parse() function hides this function's
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// cunterpart on DateFormat
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return DateFormat::parse(text, pos);
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}
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UDate
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RelativeDateFormat::parse(const UnicodeString& text, UErrorCode& status) const
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{
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// redefined here because the other parse() function hides this function's
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// counterpart on DateFormat
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return DateFormat::parse(text, status);
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}
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const UChar *RelativeDateFormat::getStringForDay(int32_t day, int32_t &len, UErrorCode &status) const {
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if(U_FAILURE(status)) {
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return NULL;
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}
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// Is it outside the resource bundle's range?
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if(day < fDayMin || day > fDayMax) {
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return NULL; // don't have it.
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}
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// Linear search the held strings
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for(int n=0;n<fDatesLen;n++) {
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if(fDates[n].offset == day) {
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len = fDates[n].len;
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return fDates[n].string;
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}
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}
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return NULL; // not found.
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}
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UnicodeString&
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RelativeDateFormat::toPattern(UnicodeString& result, UErrorCode& status) const
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{
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if (!U_FAILURE(status)) {
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result.remove();
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if (fDatePattern.isEmpty()) {
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result.setTo(fTimePattern);
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} else if (fTimePattern.isEmpty() || fCombinedFormat == NULL) {
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result.setTo(fDatePattern);
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} else {
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Formattable timeDatePatterns[] = { fTimePattern, fDatePattern };
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FieldPosition pos;
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fCombinedFormat->format(timeDatePatterns, 2, result, pos, status);
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}
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}
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return result;
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}
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UnicodeString&
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RelativeDateFormat::toPatternDate(UnicodeString& result, UErrorCode& status) const
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{
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if (!U_FAILURE(status)) {
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result.remove();
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result.setTo(fDatePattern);
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}
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return result;
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}
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UnicodeString&
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RelativeDateFormat::toPatternTime(UnicodeString& result, UErrorCode& status) const
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{
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if (!U_FAILURE(status)) {
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result.remove();
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result.setTo(fTimePattern);
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}
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return result;
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}
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void
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RelativeDateFormat::applyPatterns(const UnicodeString& datePattern, const UnicodeString& timePattern, UErrorCode &status)
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{
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if (!U_FAILURE(status)) {
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fDatePattern.setTo(datePattern);
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fTimePattern.setTo(timePattern);
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}
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}
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const DateFormatSymbols*
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RelativeDateFormat::getDateFormatSymbols() const
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{
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return fDateTimeFormatter->getDateFormatSymbols();
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}
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void RelativeDateFormat::loadDates(UErrorCode &status) {
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CalendarData calData(fLocale, "gregorian", status);
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UErrorCode tempStatus = status;
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UResourceBundle *dateTimePatterns = calData.getByKey(DT_DateTimePatternsTag, tempStatus);
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if(U_SUCCESS(tempStatus)) {
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int32_t patternsSize = ures_getSize(dateTimePatterns);
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if (patternsSize > kDateTime) {
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int32_t resStrLen = 0;
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int32_t glueIndex = kDateTime;
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if (patternsSize >= (DateFormat::kDateTimeOffset + DateFormat::kShort + 1)) {
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// Get proper date time format
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switch (fDateStyle) {
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case kFullRelative:
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case kFull:
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glueIndex = kDateTimeOffset + kFull;
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break;
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case kLongRelative:
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case kLong:
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glueIndex = kDateTimeOffset + kLong;
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break;
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case kMediumRelative:
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case kMedium:
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glueIndex = kDateTimeOffset + kMedium;
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break;
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case kShortRelative:
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case kShort:
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glueIndex = kDateTimeOffset + kShort;
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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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const UChar *resStr = ures_getStringByIndex(dateTimePatterns, glueIndex, &resStrLen, &tempStatus);
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fCombinedFormat = new MessageFormat(UnicodeString(TRUE, resStr, resStrLen), fLocale, tempStatus);
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}
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}
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UResourceBundle *strings = calData.getByKey3("fields", "day", "relative", status);
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// set up min/max
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fDayMin=-1;
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fDayMax=1;
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if(U_FAILURE(status)) {
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fDatesLen=0;
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return;
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}
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fDatesLen = ures_getSize(strings);
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fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);
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// Load in each item into the array...
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int n = 0;
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UResourceBundle *subString = NULL;
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while(ures_hasNext(strings) && U_SUCCESS(status)) { // iterate over items
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subString = ures_getNextResource(strings, subString, &status);
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if(U_FAILURE(status) || (subString==NULL)) break;
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// key = offset #
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const char *key = ures_getKey(subString);
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// load the string and length
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int32_t aLen;
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const UChar* aString = ures_getString(subString, &aLen, &status);
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if(U_FAILURE(status) || aString == NULL) break;
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// calculate the offset
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int32_t offset = atoi(key);
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// set min/max
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if(offset < fDayMin) {
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fDayMin = offset;
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}
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if(offset > fDayMax) {
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fDayMax = offset;
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}
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// copy the string pointer
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fDates[n].offset = offset;
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fDates[n].string = aString;
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fDates[n].len = aLen;
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n++;
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}
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ures_close(subString);
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// the fDates[] array could be sorted here, for direct access.
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}
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// this should to be in DateFormat, instead it was copied from SimpleDateFormat.
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Calendar*
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RelativeDateFormat::initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status)
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{
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if(!U_FAILURE(status)) {
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fCalendar = Calendar::createInstance(adoptZone?adoptZone:TimeZone::createDefault(), locale, status);
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}
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if (U_SUCCESS(status) && fCalendar == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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}
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return fCalendar;
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}
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int32_t RelativeDateFormat::dayDifference(Calendar &cal, UErrorCode &status) {
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if(U_FAILURE(status)) {
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return 0;
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}
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// TODO: Cache the nowCal to avoid heap allocs? Would be difficult, don't know the calendar type
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Calendar *nowCal = cal.clone();
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nowCal->setTime(Calendar::getNow(), status);
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// For the day difference, we are interested in the difference in the (modified) julian day number
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// which is midnight to midnight. Using fieldDifference() is NOT correct here, because
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// 6pm Jan 4th to 10am Jan 5th should be considered "tomorrow".
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int32_t dayDiff = cal.get(UCAL_JULIAN_DAY, status) - nowCal->get(UCAL_JULIAN_DAY, status);
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delete nowCal;
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return dayDiff;
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}
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U_NAMESPACE_END
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#endif
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