/*
*******************************************************************************
* Copyright (C) 2007-2009, International Business Machines Corporation and *
* others. All Rights Reserved. *
*******************************************************************************
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
//#define DEBUG_RELDTFMT
#include <stdio.h>
#include <stdlib.h>
#include "reldtfmt.h"
#include "unicode/msgfmt.h"
#include "unicode/smpdtfmt.h"
#include "gregoimp.h" // for CalendarData
#include "cmemory.h"
U_NAMESPACE_BEGIN
/**
* An array of URelativeString structs is used to store the resource data loaded out of the bundle.
*/
struct URelativeString {
int32_t offset; /** offset of this item, such as, the relative date **/
int32_t len; /** length of the string **/
const UChar* string; /** string, or NULL if not set **/
};
static const char DT_DateTimePatternsTag[]="DateTimePatterns";
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(RelativeDateFormat)
RelativeDateFormat::RelativeDateFormat(const RelativeDateFormat& other) :
DateFormat(other), fDateFormat(NULL), fTimeFormat(NULL), fCombinedFormat(NULL),
fDateStyle(other.fDateStyle), fTimeStyle(other.fTimeStyle), fLocale(other.fLocale),
fDayMin(other.fDayMin), fDayMax(other.fDayMax),
fDatesLen(other.fDatesLen), fDates(NULL)
{
if(other.fDateFormat != NULL) {
fDateFormat = (DateFormat*)other.fDateFormat->clone();
} else {
fDateFormat = NULL;
}
if (fDatesLen > 0) {
fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);
uprv_memcpy(fDates, other.fDates, sizeof(fDates[0])*fDatesLen);
}
//fCalendar = other.fCalendar->clone();
/*
if(other.fTimeFormat != NULL) {
fTimeFormat = (DateFormat*)other.fTimeFormat->clone();
} else {
fTimeFormat = NULL;
}
*/
}
RelativeDateFormat::RelativeDateFormat( UDateFormatStyle timeStyle, UDateFormatStyle dateStyle, const Locale& locale, UErrorCode& status)
: DateFormat(), fDateFormat(NULL), fTimeFormat(NULL), fCombinedFormat(NULL),
fDateStyle(dateStyle), fTimeStyle(timeStyle), fLocale(locale), fDatesLen(0), fDates(NULL)
{
if(U_FAILURE(status) ) {
return;
}
if(fDateStyle != UDAT_NONE) {
EStyle newStyle = (EStyle)(fDateStyle & ~UDAT_RELATIVE);
// Create a DateFormat in the non-relative style requested.
fDateFormat = createDateInstance(newStyle, locale);
}
if(fTimeStyle >= UDAT_FULL && fTimeStyle <= UDAT_SHORT) {
fTimeFormat = createTimeInstance((EStyle)fTimeStyle, locale);
} else if(fTimeStyle != UDAT_NONE) {
// don't support other time styles (e.g. relative styles), for now
status = U_ILLEGAL_ARGUMENT_ERROR;
return;
}
// Initialize the parent fCalendar, so that parse() works correctly.
initializeCalendar(NULL, locale, status);
loadDates(status);
}
RelativeDateFormat::~RelativeDateFormat() {
delete fDateFormat;
delete fTimeFormat;
delete fCombinedFormat;
uprv_free(fDates);
}
Format* RelativeDateFormat::clone(void) const {
return new RelativeDateFormat(*this);
}
UBool RelativeDateFormat::operator==(const Format& other) const {
if(DateFormat::operator==(other)) {
// DateFormat::operator== guarantees following cast is safe
RelativeDateFormat* that = (RelativeDateFormat*)&other;
return (fDateStyle==that->fDateStyle &&
fTimeStyle==that->fTimeStyle &&
fLocale==that->fLocale);
}
return FALSE;
}
UnicodeString& RelativeDateFormat::format( Calendar& cal,
UnicodeString& appendTo,
FieldPosition& pos) const {
UErrorCode status = U_ZERO_ERROR;
UChar emptyStr = 0;
UnicodeString dateString(&emptyStr);
// calculate the difference, in days, between 'cal' and now.
int dayDiff = dayDifference(cal, status);
// look up string
int32_t len = 0;
const UChar *theString = getStringForDay(dayDiff, len, status);
if(U_SUCCESS(status) && (theString!=NULL)) {
// found a relative string
dateString.setTo(theString, len);
}
if(fTimeFormat == NULL || fCombinedFormat == 0) {
if (dateString.length() > 0) {
appendTo.append(dateString);
} else if(fDateFormat != NULL) {
fDateFormat->format(cal,appendTo,pos);
}
} else {
if (dateString.length() == 0 && fDateFormat != NULL) {
fDateFormat->format(cal,dateString,pos);
}
UnicodeString timeString(&emptyStr);
FieldPosition timepos = pos;
fTimeFormat->format(cal,timeString,timepos);
Formattable timeDateStrings[] = { timeString, dateString };
fCombinedFormat->format(timeDateStrings, 2, appendTo, pos, status); // pos is ignored by this
int32_t offset;
if (pos.getEndIndex() > 0 && (offset = appendTo.indexOf(dateString)) >= 0) {
// pos.field was found in dateString, offset start & end based on final position of dateString
pos.setBeginIndex( pos.getBeginIndex() + offset );
pos.setEndIndex( pos.getEndIndex() + offset );
} else if (timepos.getEndIndex() > 0 && (offset = appendTo.indexOf(timeString)) >= 0) {
// pos.field was found in timeString, offset start & end based on final position of timeString
pos.setBeginIndex( timepos.getBeginIndex() + offset );
pos.setEndIndex( timepos.getEndIndex() + offset );
}
}
return appendTo;
}
UnicodeString&
RelativeDateFormat::format(const Formattable& obj,
UnicodeString& appendTo,
FieldPosition& pos,
UErrorCode& status) const
{
// this is just here to get around the hiding problem
// (the previous format() override would hide the version of
// format() on DateFormat that this function correspond to, so we
// have to redefine it here)
return DateFormat::format(obj, appendTo, pos, status);
}
void RelativeDateFormat::parse( const UnicodeString& text,
Calendar& cal,
ParsePosition& pos) const {
// Can the fDateFormat parse it?
if(fDateFormat != NULL) {
ParsePosition aPos(pos);
fDateFormat->parse(text,cal,aPos);
if((aPos.getIndex() != pos.getIndex()) &&
(aPos.getErrorIndex()==-1)) {
pos=aPos; // copy the sub parse
return; // parsed subfmt OK
}
}
// Linear search the relative strings
for(int n=0;n<fDatesLen;n++) {
if(fDates[n].string != NULL &&
(0==text.compare(pos.getIndex(),
fDates[n].len,
fDates[n].string))) {
UErrorCode status = U_ZERO_ERROR;
// Set the calendar to now+offset
cal.setTime(Calendar::getNow(),status);
cal.add(UCAL_DATE,fDates[n].offset, status);
if(U_FAILURE(status)) {
// failure in setting calendar fields
pos.setErrorIndex(pos.getIndex()+fDates[n].len);
} else {
pos.setIndex(pos.getIndex()+fDates[n].len);
}
return;
}
}
// parse failed
}
UDate
RelativeDateFormat::parse( const UnicodeString& text,
ParsePosition& pos) const {
// redefined here because the other parse() function hides this function's
// cunterpart on DateFormat
return DateFormat::parse(text, pos);
}
UDate
RelativeDateFormat::parse(const UnicodeString& text, UErrorCode& status) const
{
// redefined here because the other parse() function hides this function's
// counterpart on DateFormat
return DateFormat::parse(text, status);
}
const UChar *RelativeDateFormat::getStringForDay(int32_t day, int32_t &len, UErrorCode &status) const {
if(U_FAILURE(status)) {
return NULL;
}
// Is it outside the resource bundle's range?
if(day < fDayMin || day > fDayMax) {
return NULL; // don't have it.
}
// Linear search the held strings
for(int n=0;n<fDatesLen;n++) {
if(fDates[n].offset == day) {
len = fDates[n].len;
return fDates[n].string;
}
}
return NULL; // not found.
}
UnicodeString&
RelativeDateFormat::toPattern(UnicodeString& result, UErrorCode& status) const
{
if (!U_FAILURE(status)) {
result.remove();
if (fTimeFormat == NULL || fCombinedFormat == 0) {
if (fDateFormat != NULL) {
UnicodeString datePattern;
this->toPatternDate(datePattern, status);
if (!U_FAILURE(status)) {
result.setTo(datePattern);
}
}
} else {
UnicodeString datePattern, timePattern;
this->toPatternDate(datePattern, status);
this->toPatternTime(timePattern, status);
if (!U_FAILURE(status)) {
Formattable timeDatePatterns[] = { timePattern, datePattern };
FieldPosition pos;
fCombinedFormat->format(timeDatePatterns, 2, result, pos, status);
}
}
}
return result;
}
UnicodeString&
RelativeDateFormat::toPatternDate(UnicodeString& result, UErrorCode& status) const
{
if (!U_FAILURE(status)) {
result.remove();
if ( fDateFormat ) {
if ( fDateFormat->getDynamicClassID()==SimpleDateFormat::getStaticClassID() ) {
((SimpleDateFormat*)fDateFormat)->toPattern(result);
} else {
status = U_UNSUPPORTED_ERROR;
}
}
}
return result;
}
UnicodeString&
RelativeDateFormat::toPatternTime(UnicodeString& result, UErrorCode& status) const
{
if (!U_FAILURE(status)) {
result.remove();
if ( fTimeFormat ) {
if ( fTimeFormat->getDynamicClassID()==SimpleDateFormat::getStaticClassID() ) {
((SimpleDateFormat*)fTimeFormat)->toPattern(result);
} else {
status = U_UNSUPPORTED_ERROR;
}
}
}
return result;
}
void
RelativeDateFormat::applyPatterns(const UnicodeString& datePattern, const UnicodeString& timePattern, UErrorCode &status)
{
if (!U_FAILURE(status)) {
if ( fDateFormat && fDateFormat->getDynamicClassID()!=SimpleDateFormat::getStaticClassID() ) {
status = U_UNSUPPORTED_ERROR;
return;
}
if ( fTimeFormat && fTimeFormat->getDynamicClassID()!=SimpleDateFormat::getStaticClassID() ) {
status = U_UNSUPPORTED_ERROR;
return;
}
if ( fDateFormat ) {
((SimpleDateFormat*)fDateFormat)->applyPattern(datePattern);
}
if ( fTimeFormat ) {
((SimpleDateFormat*)fTimeFormat)->applyPattern(timePattern);
}
}
}
void RelativeDateFormat::loadDates(UErrorCode &status) {
CalendarData calData(fLocale, "gregorian", status);
UErrorCode tempStatus = status;
UResourceBundle *dateTimePatterns = calData.getByKey(DT_DateTimePatternsTag, tempStatus);
if(U_SUCCESS(tempStatus)) {
int32_t patternsSize = ures_getSize(dateTimePatterns);
if (patternsSize > kDateTime) {
int32_t resStrLen = 0;
int32_t glueIndex = kDateTime;
if (patternsSize >= (DateFormat::kDateTimeOffset + DateFormat::kShort + 1)) {
// Get proper date time format
switch (fDateStyle) {
case kFullRelative:
case kFull:
glueIndex = kDateTimeOffset + kFull;
break;
case kLongRelative:
case kLong:
glueIndex = kDateTimeOffset + kLong;
break;
case kMediumRelative:
case kMedium:
glueIndex = kDateTimeOffset + kMedium;
break;
case kShortRelative:
case kShort:
glueIndex = kDateTimeOffset + kShort;
break;
default:
break;
}
}
const UChar *resStr = ures_getStringByIndex(dateTimePatterns, glueIndex, &resStrLen, &tempStatus);
fCombinedFormat = new MessageFormat(UnicodeString(TRUE, resStr, resStrLen), fLocale, tempStatus);
}
}
UResourceBundle *strings = calData.getByKey3("fields", "day", "relative", status);
// set up min/max
fDayMin=-1;
fDayMax=1;
if(U_FAILURE(status)) {
fDatesLen=0;
return;
}
fDatesLen = ures_getSize(strings);
fDates = (URelativeString*) uprv_malloc(sizeof(fDates[0])*fDatesLen);
// Load in each item into the array...
int n = 0;
UResourceBundle *subString = NULL;
while(ures_hasNext(strings) && U_SUCCESS(status)) { // iterate over items
subString = ures_getNextResource(strings, subString, &status);
if(U_FAILURE(status) || (subString==NULL)) break;
// key = offset #
const char *key = ures_getKey(subString);
// load the string and length
int32_t aLen;
const UChar* aString = ures_getString(subString, &aLen, &status);
if(U_FAILURE(status) || aString == NULL) break;
// calculate the offset
int32_t offset = atoi(key);
// set min/max
if(offset < fDayMin) {
fDayMin = offset;
}
if(offset > fDayMax) {
fDayMax = offset;
}
// copy the string pointer
fDates[n].offset = offset;
fDates[n].string = aString;
fDates[n].len = aLen;
n++;
}
ures_close(subString);
// the fDates[] array could be sorted here, for direct access.
}
// this should to be in DateFormat, instead it was copied from SimpleDateFormat.
Calendar*
RelativeDateFormat::initializeCalendar(TimeZone* adoptZone, const Locale& locale, UErrorCode& status)
{
if(!U_FAILURE(status)) {
fCalendar = Calendar::createInstance(adoptZone?adoptZone:TimeZone::createDefault(), locale, status);
}
if (U_SUCCESS(status) && fCalendar == NULL) {
status = U_MEMORY_ALLOCATION_ERROR;
}
return fCalendar;
}
int32_t RelativeDateFormat::dayDifference(Calendar &cal, UErrorCode &status) {
if(U_FAILURE(status)) {
return 0;
}
// TODO: Cache the nowCal to avoid heap allocs? Would be difficult, don't know the calendar type
Calendar *nowCal = cal.clone();
nowCal->setTime(Calendar::getNow(), status);
// For the day difference, we are interested in the difference in the (modified) julian day number
// which is midnight to midnight. Using fieldDifference() is NOT correct here, because
// 6pm Jan 4th to 10am Jan 5th should be considered "tomorrow".
int32_t dayDiff = cal.get(UCAL_JULIAN_DAY, status) - nowCal->get(UCAL_JULIAN_DAY, status);
delete nowCal;
return dayDiff;
}
U_NAMESPACE_END
#endif