Support to Korean Dangi Calendar for tdf#125446

Support to Korean Traditional Calendar, Dan-gi(단기/檀紀) Calendar

The era name, Dangi(단기,檀紀) originating from the foundation of Gojoseon[고조선/古朝鮮] is also widely used in Korea as an indication of long civilization of Korea.

Full name: `Dangun-giwon (단군기원, 檀君紀元 "First Age of Lord Dangun")`

Abbreviation Name: `Dangi(단기,檀紀)`

The Dangi Calendar measures years from the ancient founding of Korea in 2333 B.C.

Reference. ICU Library
ICU library support Dangi Calendar.
ICU4C 50 http://bugs.icu-project.org/trac/ticket/9255
ICU4J 51 http://bugs.icu-project.org/trac/ticket/9616

Change-Id: I490b8b288c68f498eb29d4fcc73251cbef3ac6d4
Reviewed-on: https://gerrit.libreoffice.org/72943
Tested-by: Jenkins
Reviewed-by: Eike Rathke <erack@redhat.com>

i18npool/inc/calendar_gregorian.hxx

@@ -177,6 +177,16 @@ public:
 };
 
 
+//  class Calendar_dangi
+
+class Calendar_dangi : public Calendar_gregorian
+{
+public:
+    // Constructors
+    Calendar_dangi();
+};
+
+
 //  class Calendar_buddhist
 
 class Calendar_buddhist : public Calendar_gregorian

i18npool/source/calendar/calendar_gregorian.cxx

@@ -226,6 +226,19 @@ Calendar_ROC::Calendar_ROC() : Calendar_gregorian(ROC_eraArray)
     cCalendar = "com.sun.star.i18n.Calendar_ROC";
 }
 
+/**
+* The start year of the Korean traditional calendar (Dan-gi) is the inaugural
+* year of Dan-gun (BC 2333).
+*/
+static const Era dangi_eraArray[] = {
+    {-2332, 1, 1, 0},
+    {0, 0, 0, 0}
+};
+Calendar_dangi::Calendar_dangi() : Calendar_gregorian(dangi_eraArray)
+{
+    cCalendar = "com.sun.star.i18n.Calendar_dangi";
+}
+
 static const Era buddhist_eraArray[] = {
     {-542, 1, 1, 0},
     {0, 0, 0, 0}

i18npool/source/registerservices/registerservices.cxx

@@ -114,6 +114,7 @@ IMPL_CREATEINSTANCE( Calendar_gregorian )
 IMPL_CREATEINSTANCE( Calendar_hanja )
 IMPL_CREATEINSTANCE( Calendar_gengou )
 IMPL_CREATEINSTANCE( Calendar_ROC )
+IMPL_CREATEINSTANCE( Calendar_dangi )
 IMPL_CREATEINSTANCE( Calendar_hijri )
 IMPL_CREATEINSTANCE( Calendar_jewish )
 IMPL_CREATEINSTANCE( Calendar_buddhist )
@@ -295,6 +296,9 @@ static const struct InstancesArray {
     {   "com.sun.star.i18n.Calendar_ROC",
         "com.sun.star.i18n.Calendar_ROC",
         &Calendar_ROC_CreateInstance },
+    {   "com.sun.star.i18n.Calendar_dangi",
+        "com.sun.star.i18n.Calendar_dangi",
+        &Calendar_dangi_CreateInstance },
     {   "com.sun.star.i18n.Calendar_hanja_yoil",
         "com.sun.star.i18n.Calendar_hanja_yoil",
         &Calendar_hanja_CreateInstance },

i18npool/util/i18npool.component

@@ -49,6 +49,9 @@
   <implementation name="com.sun.star.i18n.Calendar_ROC">
     <service name="com.sun.star.i18n.Calendar_ROC"/>
   </implementation>
+  <implementation name="com.sun.star.i18n.Calendar_dangi">
+    <service name="com.sun.star.i18n.Calendar_dangi"/>
+  </implementation>
   <implementation name="com.sun.star.i18n.Calendar_buddhist">
     <service name="com.sun.star.i18n.Calendar_buddhist"/>
   </implementation>