path: root/staging/libreoffice/fix_broken_hebrew_wordwrapping.diff

From 20c24114143d6d38774b56a142fd4ae05094308e Mon Sep 17 00:00:00 2001
From: Caolán McNamara <caolanm@redhat.com>
Date: Sun, 13 May 2012 21:41:30 +0000
Subject: Resolves: fdo#49849 implement Unicode 6.1 hebrew line breaking rules

i.e.  sync with svn diff -c 31071
http://source.icu-project.org/repos/icu/icu/trunk/source/data/brkitr/line.txt

Change-Id: I I I41b3d02f1a0da3b83a9684f29d466660d96254c6
---
diff --git a/i18npool/qa/cppunit/test_breakiterator.cxx b/i18npool/qa/cppunit/test_breakiterator.cxx
index 14051d4..ffd590c 100644
--- a/i18npool/qa/cppunit/test_breakiterator.cxx
+++ b/i18npool/qa/cppunit/test_breakiterator.cxx
@@ -42,6 +42,7 @@
 #include <unotest/bootstrapfixturebase.hxx>
 
 #include <rtl/strbuf.hxx>
+#include <rtl/ustrbuf.hxx>
 
 #include <string.h>
 
@@ -58,6 +59,9 @@ public:
     void testWeak();
     void testAsian();
     void testThai();
+#if TODO
+    void testNorthernThai();
+#endif
 
     CPPUNIT_TEST_SUITE(TestBreakIterator);
     CPPUNIT_TEST(testLineBreaking);
@@ -71,6 +71,9 @@
     CPPUNIT_TEST(testWeak);
     CPPUNIT_TEST(testAsian);
     CPPUNIT_TEST(testThai);
+#if TODO
+    CPPUNIT_TEST(testNorthernThai);
+#endif
     CPPUNIT_TEST_SUITE_END();
 
 private:
@@ -80,28 +83,46 @@
     uno::Reference<i18n::XBreakIterator> m_xBreak;
 };
 
-//See https://bugs.freedesktop.org/show_bug.cgi?id=31271 for motivation
 void TestBreakIterator::testLineBreaking()
 {
-    ::rtl::OUString aTest1(RTL_CONSTASCII_USTRINGPARAM("(some text here)"));
-
     i18n::LineBreakHyphenationOptions aHyphOptions;
     i18n::LineBreakUserOptions aUserOptions;
     lang::Locale aLocale;
 
-    aLocale.Language = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("en"));
-    aLocale.Country = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("US"));
-
+    //See https://bugs.freedesktop.org/show_bug.cgi?id=31271
     {
-        //Here we want the line break to leave text here) on the next line
-        i18n::LineBreakResults aResult = m_xBreak->getLineBreak(aTest1, strlen("(some tex"), aLocale, 0, aHyphOptions, aUserOptions);
-        CPPUNIT_ASSERT_MESSAGE("Expected a break at the the start of the word", aResult.breakIndex == 6);
+         ::rtl::OUString aTest(RTL_CONSTASCII_USTRINGPARAM("(some text here)"));
+
+        aLocale.Language = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("en"));
+        aLocale.Country = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("US"));
+
+        {
+            //Here we want the line break to leave text here) on the next line
+            i18n::LineBreakResults aResult = m_xBreak->getLineBreak(aTest, strlen("(some tex"), aLocale, 0, aHyphOptions, aUserOptions);
+            CPPUNIT_ASSERT_MESSAGE("Expected a break at the the start of the word", aResult.breakIndex == 6);
+        }
+
+        {
+            //Here we want the line break to leave "here)" on the next line
+            i18n::LineBreakResults aResult = m_xBreak->getLineBreak(aTest, strlen("(some text here"), aLocale, 0, aHyphOptions, aUserOptions);
+            CPPUNIT_ASSERT_MESSAGE("Expected a break at the the start of the word", aResult.breakIndex == 11);
+        }
     }
 
+    //See https://bugs.freedesktop.org/show_bug.cgi?id=49849
     {
-        //Here we want the line break to leave "here)" on the next line
-        i18n::LineBreakResults aResult = m_xBreak->getLineBreak(aTest1, strlen("(some text here"), aLocale, 0, aHyphOptions, aUserOptions);
-        CPPUNIT_ASSERT_MESSAGE("Expected a break at the the start of the word", aResult.breakIndex == 11);
+        const sal_Unicode HEBREW1[] = { 0x05DE, 0x05D9, 0x05DC, 0x05D9, 0x5DD };
+        ::rtl::OUString aWord(HEBREW1, SAL_N_ELEMENTS(HEBREW1));
+        ::rtl::OUString aTest(rtl::OUStringBuffer(aWord).append(' ').append(aWord).makeStringAndClear());
+
+        aLocale.Language = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("he"));
+        aLocale.Country = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("IL"));
+
+        {
+            //Here we want the line break to happen at the whitespace
+            i18n::LineBreakResults aResult = m_xBreak->getLineBreak(aTest, aTest.getLength()-1, aLocale, 0, aHyphOptions, aUserOptions);
+            CPPUNIT_ASSERT_MESSAGE("Expected a break at the the start of the word", aResult.breakIndex == aWord.getLength()+1);
+        }
     }
 }
 
@@ -295,27 +320,29 @@ void TestBreakIterator::testThai()
     aLocale.Language = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("th"));
     aLocale.Country = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("TH"));
 
-    i18n::Boundary aBounds;
-    {
-        const sal_Unicode THAI1[] = { 0x0E01, 0x0E38, 0x0E2B, 0x0E25, 0x0E32, 0x0E1A };
-        ::rtl::OUString aTest(THAI1, SAL_N_ELEMENTS(THAI1));
-        aBounds = m_xBreak->getWordBoundary(aTest, 0, aLocale,
-            i18n::WordType::DICTIONARY_WORD, true);
-        CPPUNIT_ASSERT_MESSAGE("Should skip full word",
-            aBounds.startPos == 0 && aBounds.endPos == aTest.getLength());
-    }
+    const sal_Unicode THAI1[] = { 0x0E01, 0x0E38, 0x0E2B, 0x0E25, 0x0E32, 0x0E1A };
+    ::rtl::OUString aTest(THAI1, SAL_N_ELEMENTS(THAI1));
+    i18n::Boundary aBounds = m_xBreak->getWordBoundary(aTest, 0, aLocale,
+        i18n::WordType::DICTIONARY_WORD, true);
+    CPPUNIT_ASSERT_MESSAGE("Should skip full word",
+        aBounds.startPos == 0 && aBounds.endPos == aTest.getLength());
+}
 
-#ifdef TODO
-    {
-        const sal_Unicode NORTHERN_THAI1[] = { 0x0E01, 0x0E38, 0x0E4A, 0x0E2B, 0x0E25, 0x0E32, 0x0E1A };
-        ::rtl::OUString aTest(NORTHERN_THAI1, SAL_N_ELEMENTS(NORTHERN_THAI1));
-        aBounds = m_xBreak->getWordBoundary(aTest, 0, aLocale,
-            i18n::WordType::DICTIONARY_WORD, true);
-        CPPUNIT_ASSERT_MESSAGE("Should skip full word",
-            aBounds.startPos == 0 && aBounds.endPos == aTest.getLength());
-    }
-#endif
+#if TODO
+void TestBreakIterator::testNorthernThai()
+{
+    lang::Locale aLocale;
+    aLocale.Language = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("nod"));
+    aLocale.Country = ::rtl::OUString(RTL_CONSTASCII_USTRINGPARAM("TH"));
+
+    const sal_Unicode NORTHERN_THAI1[] = { 0x0E01, 0x0E38, 0x0E4A, 0x0E2B, 0x0E25, 0x0E32, 0x0E1A };
+    ::rtl::OUString aTest(NORTHERN_THAI1, SAL_N_ELEMENTS(NORTHERN_THAI1));
+    i18n::Boundary aBounds = m_xBreak->getWordBoundary(aTest, 0, aLocale,
+        i18n::WordType::DICTIONARY_WORD, true);
+    CPPUNIT_ASSERT_MESSAGE("Should skip full word",
+        aBounds.startPos == 0 && aBounds.endPos == aTest.getLength());
 }
+#endif
 
 void TestBreakIterator::setUp()
 {
diff --git a/i18npool/source/breakiterator/data/README b/i18npool/source/breakiterator/data/README
new file mode 100644
index 0000000..8d7598d
--- a/dev/null
+++ b/i18npool/source/breakiterator/data/README
@@ -0,0 +1,12 @@
+The originals of these come from svn checkout
+http://source.icu-project.org/repos/icu/icu/trunk/source/data/brkitr they no
+longer appear in the icu tarballs, but are in icu's svn
+
+At various stages these copies have been customized and are not horribly out of
+sync. It unclear which diffs from the base versions are deliberate and which
+are now accidental :-(
+
+We need to review the various issues referenced in the commits that caused
+custimizations and see if they're still relevant or not, write regression tests
+for them, if any are still relavant then apply the changes back on top of the
+latest versions.
diff --git a/i18npool/source/breakiterator/data/line.txt b/i18npool/source/breakiterator/data/line.txt
index cbabee6..91c8f3d 100644
--- a/i18npool/source/breakiterator/data/line.txt
+++ b/i18npool/source/breakiterator/data/line.txt
@@ -61,11 +61,13 @@ $BB = [:LineBreak =  Break_Before:];
 $BK = [:LineBreak =  Mandatory_Break:];
 $B2 = [:LineBreak =  Break_Both:];
 $CB = [:LineBreak =  Contingent_Break:];
+$CJ = [:LineBreak =  Conditional_Japanese_Starter:];
 $CL = [:LineBreak =  Close_Punctuation:] ;
 $CM = [:LineBreak =  Combining_Mark:];
 $CR = [:LineBreak =  Carriage_Return:];
 $EX = [:LineBreak =  Exclamation:];
 $GL = [:LineBreak =  Glue:];
+$HL = [:LineBreak =  Hebrew_Letter:];
 $HY = [:LineBreak =  Hyphen:];
 $H2 = [:LineBreak =  H2:];
 $H3 = [:LineBreak =  H3:];
@@ -77,7 +79,7 @@ $JV = [:LineBreak =  JV:];
 $JT = [:LineBreak =  JT:];
 $LF = [:LineBreak =  Line_Feed:];
 $NL = [:LineBreak =  Next_Line:];
-$NS = [:LineBreak =  Nonstarter:];
+$NS = [[:LineBreak =  Nonstarter:] $CJ];
 $NU = [:LineBreak =  Numeric:];
 $OP = [[:LineBreak =  Open_Punctuation:] - $DG];
 $PO = [:LineBreak =  Postfix_Numeric:];
@@ -118,6 +120,7 @@ $B2cm = $B2 $CM*;
 $CLcm = $CL $CM*;
 $EXcm = $EX $CM*;
 $GLcm = $GL $CM*;
+$HLcm = $HL $CM*;
 $HYcm = $HY $CM*;
 $H2cm = $H2 $CM*;
 $H3cm = $H3 $CM*;
@@ -150,6 +153,7 @@ $B2 $CM+;
 $CL $CM+;
 $EX $CM+;
 $GL $CM+;
+$HL $CM+;
 $HY $CM+;
 $H2 $CM+;
 $H3 $CM+;
@@ -186,7 +190,7 @@ $CANT_CM = [ $SP $BK $CR $LF $NL $ZW $CM];       # Bases that can't take CMs
 #            so for this one case we need to manually list out longer sequences.
 #
 $AL_FOLLOW_NOCM = [$BK $CR $LF $NL $ZW $SP];
-$AL_FOLLOW_CM   = [$CL $EX $IS $SY $WJ $GL $QU $BA $HY $NS $IN $NU $ALPlus $OP];
+$AL_FOLLOW_CM   = [$CL $EX $HL $IS $SY $WJ $GL $QU $BA $HY $NS $IN $NU $ALPlus $OP];
 $AL_FOLLOW      = [$AL_FOLLOW_NOCM $AL_FOLLOW_CM];
 
 
@@ -320,8 +324,13 @@ $LB20NonBreaks $CM* ($BAcm | $HYcm | $NScm);
 $BBcm [^$CB];                                  #  $BB  x
 $BBcm $LB20NonBreaks $CM*;
 
+# LB 21a Don't break after Hebrew + Hyphen
+#   HL (HY | BA) x
+#  
+$HLcm ($HYcm | $BAcm) [^$CB]?;
+
 # LB 22
-$ALcm    $INcm;
+($ALcm | $HLcm) $INcm;
 $CM+     $INcm;     #  by rule 10, any otherwise unattached CM behaves as AL
 $IDcm    $INcm;
 $INcm    $INcm;
@@ -331,16 +340,18 @@ $NUcm    $INcm;
 # $LB 23
 $IDcm  $POcm;
 $ALcm  $NUcm;       # includes $LB19
+$HLcm  $NUcm;
 $CM+   $NUcm;       # Rule 10, any otherwise unattached CM behaves as AL
 $NUcm  $ALcm;
+$NUcm  $HLcm;
 
 #
 # LB 24
 #
 $PRcm $IDcm;
 $ALcm $PRcm;
-$PRcm $ALcm;
-$POcm $ALcm;
+$PRcm ($ALcm | $HLcm);
+$POcm ($ALcm | $HLcm);
 
 #
 # LB 25   Numbers.
@@ -361,8 +372,8 @@ $PRcm ($JLcm | $JVcm | $JTcm | $H2cm | $H3cm);
 
 # LB 28   Do not break between alphabetics
 #
-$ALcm $ALcm;
-$CM+ $ALcm;      # The $CM+ is from rule 10, and unattached CM is treated as AL
+($ALcm | $HLcm) ($ALcm | $HLcm);
+$CM+ ($ALcm | $HLcm);      # The $CM+ is from rule 10, an unattached CM is treated as AL
 
 # LB 29
 $IScm ($ALcm | $NUcm);
@@ -371,11 +382,9 @@ $IScm ($ALcm | $NUcm);
 # Rule 30   Do not break between letters, numbers or ordinary symbols
 #           and opening or closing punctuation
 #
-($ALcm | $NUcm) $OPcm;
+($ALcm | $HLcm | $NUcm) $OPcm;
 $CM+ $OPcm;
-$CLcm ($ALcm | $NUcm);
-
-
+$CLcm ($ALcm | $HLcm | $NUcm);
 
 #
 #  Reverse Rules.
@@ -391,6 +400,7 @@ $CM+ $B2;
 $CM+ $CL;
 $CM+ $EX;
 $CM+ $GL;
+$CM+ $HL;
 $CM+ $HY;
 $CM+ $H2;
 $CM+ $H3;
@@ -544,24 +554,25 @@ $CM* ($BA | $HY | $NS) $CM* [$LB20NonBreaks-$CM];     #  . x (BA | HY | NS)
 $CM* [$LB20NonBreaks-$CM] $CM* $BB;                   #  BB x .
 [^$CB] $CM* $BB;                                      # 
 
-
+# LB21a
+[^$CB] $CM* ($HY | $BA) $CM* $HL;
 
 # LB 22
-$CM* $IN $CM* $ALPlus;
+$CM* $IN $CM* ($ALPlus | $HL);
 $CM* $IN $CM* $ID;
 $CM* $IN $CM* $IN;
 $CM* $IN $CM* $NU;
 
 # LB 23
 $CM* $PO $CM* $ID;
-$CM* $NU $CM* $ALPlus;
-$CM* $ALPlus $CM* $NU;
+$CM* $NU $CM* ($ALPlus | $HL);
+$CM* ($ALPlus | $HL) $CM* $NU;
 
 # LB 24
 $CM* $ID $CM* $PR;
 $CM* $PR $CM* $ALPlus;
-$CM* $ALPlus $CM* $PR;
-$CM* $ALPlus $CM* $PO;
+$CM* ($ALPlus | $HL) $CM* $PR;
+$CM* ($ALPlus | $HL) $CM* $PO;
 
 $CM* $ALPlus $CM* ($IS | $SY | $HY)+ / $SP;
 $CM* $NU+ $CM* $HY+ / $SP;
@@ -580,15 +591,14 @@ $CM* $PO $CM* ($H3 | $H2 | $JT | $JV | $JL);
 $CM* ($H3 | $H2 | $JT | $JV | $JL) $CM* $PR;
 
 # LB 28
-$CM* $ALPlus $CM* $ALPlus;
-
+$CM* ($ALPlus | $HL) $CM* ($ALPlus | $HL);
 
 # LB 29
 $CM* ($NU | $ALPlus) $CM* $IS+ [^$SP];
 
 # LB 30
-$CM* $OP $CM* ($NU | $ALPlus);
-$CM* ($NU | $ALPlus) $CM* ($CL | $SY)+ [^$SP];
+$CM* $OP $CM* ($ALPlus | $HL | $NU);
+$CM* ($ALPlus | $HL | $NU) $CM* ($CL | $SY)+ [^$SP];
 
 
 ## -------------------------------------------------
@@ -609,6 +619,9 @@ $SP+ $CM* $QU;
 $SP+ $CM* $CL;
 $SP+ $CM* $B2;
 
+# LB 21
+$CM* ($HY | $BA) $CM* $HL;
+
 # LB 18
 ($CM* ($IS | $SY))+ $CM* $NU;
 $CL $CM* ($NU | $IS | $SY);
@@ -629,6 +642,6 @@ $dictionary $dictionary;
 #  turn off rule chaining.  We don't want to move more
 #  than necessary.
 #
-[$CM $OP $QU $CL $B2 $PR $HY $SP $dictionary]+ [^$CM $OP $QU $CL $B2 $PR $HY $dictionary];
+[$CM $OP $QU $CL $B2 $PR $HY $BA $SP $dictionary]+ [^$CM $OP $QU $CL $B2 $PR $HY $BA $dictionary];
 $dictionary $dictionary;
 
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