tdf#158885 cui offapi sw xmloff: fix hyphenation at stem boundary

Add new hyphenation option "Compound characters at line end",
equivalent of libhyphen's COMPOUNDLEFTHYPHENMIN, to limit bad
pattern based hyphenation of compound words using morphological
analysis of Hunspell.

* Add checkbox to Text Flow in paragraph formatting dialog window
* Store property in paragraph model:
css::style::ParagraphProperties::ParaHyphenationCompoundMinLeadingChars
* Add ODF import/export (loext:hyphenation-compound-remain-char-count)
* Add ODF unit tests

Note: slower Hunspell based hyphenation is used only if
ParaHyphenationCompoundMinLeadingChars >= 3 (we assume that
libhyphen hyphenation patterns cover the smaller distances
correctly). Hunpell based hyphenation doesn't introduce
new hyphenation breaks, only detects the stem boundaries
from the libhyphen based hyphenation breaks.

Follow-up to commit c899d3608d30f3ab4c2bc193c1fcd765221614a4
"tdf#158885 sw: don't hyphenate right after a stem boundary",
replacing hyphenation zone dependence with the new "Compound
characters at line end".

Note: preset COMPOUNDLEFTHYPHENMIN values aren't loaded yet
from hyphenation dictionaries.

Note: the suffix of the last stem of the compound is always
hyphenated, i.e. the distance limits only hyphenation
inside the stem, not inside its suffix or at the end of the
stem before the suffix.

Change-Id: I46a0288929a66f7453e3ff97fbc5a0c6a01f038f
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/164983
Tested-by: László Németh <nemeth@numbertext.org>
Reviewed-by: László Németh <nemeth@numbertext.org>

1 files changed, 12 insertions, 1 deletions

diff --git a/editeng/source/items/paraitem.cxx b/editeng/source/items/paraitem.cxx
index 40a057abf1b1..3e99813f628d 100644
--- a/editeng/source/items/paraitem.cxx
+++ b/editeng/source/items/paraitem.cxx
@@ -568,7 +568,8 @@ SvxHyphenZoneItem::SvxHyphenZoneItem( const bool bHyph, const sal_uInt16 nId ) :
     nMaxHyphens(255),
     nMinWordLength(0),
     nTextHyphenZone(0),
-    nKeep(0) // TODO change default value to COLUMN
+    nKeep(0),           // TODO change default value to COLUMN
+    nCompoundMinLead(0)
 {
 }
 
@@ -605,6 +606,9 @@ bool    SvxHyphenZoneItem::QueryValue( uno::Any& rVal, sal_uInt8 nMemberId ) con
         case MID_HYPHEN_KEEP:
             rVal <<= static_cast<sal_Int16>(nKeep);
         break;
+        case MID_HYPHEN_COMPOUND_MIN_LEAD:
+            rVal <<= static_cast<sal_Int16>(nCompoundMinLead);
+        break;
     }
     return true;
 }
@@ -650,6 +654,9 @@ bool SvxHyphenZoneItem::PutValue( const uno::Any& rVal, sal_uInt8 nMemberId )
         case MID_HYPHEN_KEEP:
             nKeep = static_cast<sal_uInt8>(nNewVal);
         break;
+        case MID_HYPHEN_COMPOUND_MIN_LEAD:
+            nCompoundMinLead = static_cast<sal_uInt8>(nNewVal);
+        break;
     }
     return true;
 }
@@ -666,6 +673,7 @@ bool SvxHyphenZoneItem::operator==( const SfxPoolItem& rAttr ) const
             && rItem.bPageEnd == bPageEnd
             && rItem.nMinLead == nMinLead
             && rItem.nMinTrail == nMinTrail
+            && rItem.nCompoundMinLead == nCompoundMinLead
             && rItem.nMaxHyphens == nMaxHyphens
             && rItem.nMinWordLength == nMinWordLength
             && rItem.nTextHyphenZone == nTextHyphenZone
@@ -702,6 +710,7 @@ bool SvxHyphenZoneItem::GetPresentation
             rText += EditResId(pId) + cpDelimTmp +
                     OUString::number( nMinLead ) + cpDelimTmp +
                     OUString::number( nMinTrail ) + cpDelimTmp +
+                    OUString::number( nCompoundMinLead ) + cpDelimTmp +
                     OUString::number( nMaxHyphens ) + cpDelimTmp +
                     OUString::number( nMinWordLength ) + cpDelimTmp +
                     GetMetricText( nTextHyphenZone, eCoreUnit, ePresUnit, &rIntl ) +
@@ -733,6 +742,8 @@ bool SvxHyphenZoneItem::GetPresentation
                     cpDelimTmp +
                     EditResId(RID_SVXITEMS_HYPHEN_MINTRAIL).replaceAll("%1", OUString::number(nMinTrail)) +
                     cpDelimTmp +
+                    EditResId(RID_SVXITEMS_HYPHEN_COMPOUND_MINLEAD).replaceAll("%1", OUString::number(nCompoundMinLead)) +
+                    cpDelimTmp +
                     EditResId(RID_SVXITEMS_HYPHEN_MAX).replaceAll("%1", OUString::number(nMaxHyphens)) +
                     cpDelimTmp +
                     EditResId(RID_SVXITEMS_HYPHEN_MINWORDLEN).replaceAll("%1", OUString::number(nMinWordLength));