Resolves: fdo#52020 ICU breakiterator not used for Khmer

Change-Id: I4c99129cabe70f17aa223cf8ec0ae1529188b6b7
(cherry picked from commit 8ad1d444)
Signed-off-by: Stephan Bergmann <sbergman@redhat.com>

i18npool/qa/cppunit/test_breakiterator.cxx

@@ -62,6 +62,7 @@ public:
 #if TODO
     void testNorthernThai();
 #endif
+    void testKhmer();
 
     CPPUNIT_TEST_SUITE(TestBreakIterator);
     CPPUNIT_TEST(testLineBreaking);
@@ -72,6 +73,7 @@ public:
 #if TODO
     CPPUNIT_TEST(testNorthernThai);
 #endif
+    CPPUNIT_TEST(testKhmer);
     CPPUNIT_TEST_SUITE_END();
 private:
     uno::Reference<i18n::XBreakIterator> m_xBreak;
@@ -344,6 +346,28 @@ void TestBreakIterator::testNorthernThai()
 }
 #endif
 
+//A test to ensure that our khmer word boundary detection is useful
+//https://bugs.freedesktop.org/show_bug.cgi?id=52020
+void TestBreakIterator::testKhmer()
+{
+    lang::Locale aLocale;
+    aLocale.Language = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("km"));
+    aLocale.Country = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("KH"));
+
+    const sal_Unicode KHMER1[] = { 0x17B2, 0x17D2, 0x1799, 0x1782, 0x17C1 };
+
+    ::rtl::OUString aTest(KHMER1, SAL_N_ELEMENTS(KHMER1));
+    i18n::Boundary aBounds = m_xBreak->getWordBoundary(aTest, 0, aLocale,
+        i18n::WordType::DICTIONARY_WORD, true);
+
+    CPPUNIT_ASSERT(aBounds.startPos == 0 && aBounds.endPos == 3);
+
+    aBounds = m_xBreak->getWordBoundary(aTest, aBounds.endPos, aLocale,
+        i18n::WordType::DICTIONARY_WORD, true);
+
+    CPPUNIT_ASSERT(aBounds.startPos == 3 && aBounds.endPos == 5);
+}
+
 void TestBreakIterator::setUp()
 {
     BootstrapFixtureBase::setUp();

i18npool/source/breakiterator/breakiterator_unicode.cxx

@@ -135,7 +135,7 @@ void SAL_CALL BreakIterator_Unicode::loadICUBreakIterator(const com::sun::star::
                 rbi = new OOoRuleBasedBreakIterator(udata_open("OpenOffice", "brk",
                     OUStringToOString(breakRules[breakType], RTL_TEXTENCODING_ASCII_US).getStr(), &status), status);
             }
-            else if ( rLocale.Language != "th" ) //use icu's breakiterator for Thai
+            else if (rLocale.Language != "th" && rLocale.Language != "km") //use icu's breakiterator for Thai and Khmer
             {
                 status = U_ZERO_ERROR;
                 OStringBuffer aUDName(64);