tdf#115007 add NatNum12 formatting to dates

to support variants of preposition, suffixation,
article or their combinations. For example, Catalan
"de març"/"d'abril", English "1st of May"/"First of
May", Hungarian "május 1-je/május 2-a" (May 1/2) or
Turkish "2018'de/2019'da" (in 2018/2019) usage can
be automatic in templates and mail merge.

When the date format contains more than a date keyword,
it needs to specify in the NatNum12 argument which date
element has got special formatting (described by
libnumbertext formatting codes, and an optional
initial capitalize/upper/title argument):

'[NatNum12 ordinal-number]D'              -> "1st"
'[NatNum12 D=ordinal-number]D" of "MMMM'  -> "1st of April"
'[NatNum12 D=ordinal]D" of "MMMM'         -> "first of April"
'[NatNum12 YYYY=title year,D=capitalize ordinal]
D"of "MMMM", "YYYY' -> "First of April, Nineteen Ninety"

Note: set only for YYYY, MMMM, M, DDDD, D and NNN/AAAA
in date formats. It's possible to extend this for other
keywords and date + time combinations, according to
the possible language requirements.

Note 2: l10n date formats can use the new NatNum12 date
formats from formatindex=60, see FormatElement in
i18npool/source/localedata/ XML files and FormatElement
specification:
https://opengrok.libreoffice.org/xref/core/i18npool/source/localedata/data/locale.dtd#223

Change-Id: I598849f1492f4012e83cef9293773badbff16206
Reviewed-on: https://gerrit.libreoffice.org/55613
Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: László Németh <nemeth@numbertext.org>
Reviewed-on: https://gerrit.libreoffice.org/55767
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>

1 files changed, 6 insertions, 8 deletions

diff --git a/i18npool/source/nativenumber/nativenumbersupplier.cxx b/i18npool/source/nativenumber/nativenumbersupplier.cxx
index 5fb34c993167..8c3698216b81 100644
--- a/i18npool/source/nativenumber/nativenumbersupplier.cxx
+++ b/i18npool/source/nativenumber/nativenumbersupplier.cxx
@@ -588,10 +588,8 @@ OUString getNumberText(const Locale& rLocale, const OUString& rNumberString,
             break;
     }
 
-    if (count == 0)
-        return rNumberString;
-
-    OUString aNumberStr = sBuf.makeStringAndClear();
+    // Handle also month and day names for NatNum12 date formatting
+    const OUString& rNumberStr = (count == 0) ? rNumberString : sBuf.makeStringAndClear();
 
     // Guard the static variables below.
     osl::MutexGuard aGuard( theNatNumMutex::get());
@@ -606,17 +604,17 @@ OUString getNumberText(const Locale& rLocale, const OUString& rNumberString,
     // of the continuous update of the multiple number names during typing.
     // We fix this by buffering the result of the conversion.
     static std::unordered_map<OUString, std::map<OUString, OUString>> aBuff;
-    auto& rItems = aBuff[aNumberStr];
+    auto& rItems = aBuff[rNumberStr];
     auto& rItem = rItems[numbertext_prefix + aLoc];
     if (rItem.isEmpty())
     {
-        rItem = xNumberText->getNumberText(numbertext_prefix + aNumberStr, rLocale);
+        rItem = xNumberText->getNumberText(numbertext_prefix + rNumberStr, rLocale);
         // use number at missing number to text conversion
         if (rItem.isEmpty())
-            rItem = aNumberStr;
+            rItem = rNumberStr;
     }
     OUString sResult = rItem;
-    if (i < len)
+    if (i != 0 && i < len)
         sResult += rNumberString.copy(i);
     return sResult;
 }