tdf#150408: Implement "Legal" numbering (all levels using Arabic numbers)

Enabling this feature on a list level makes all numbered sublevels, that
constitute the number of this level, to use Arabic numerals. This doesn't
change the labels of other levels: e.g., if level 1 uses A,B,C; level 2
uses i,ii,iii; level 3 uses a,b,c, and is "Legal"; and level 4 uses 1,2,3;
then a list may look like

A. Something
A.i. Some subitem
A.ii. Another subitem
1.2.1. This is a "Legal" sub-subitem
A.ii.a.1. And its child

This improves interoperability with Word.

This change introduces document model, ODF and OOXML import and export.
In ODF, a new boolean attribute of 'text:outline-level-style' element,
'loext:is-legal', is introduced; its default value is "false".

Change-Id: I5ae9f970864854c7e84c4b2f7ce46634b3ef104e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/154288
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>

2 files changed, 18 insertions, 0 deletions

diff --git a/xmloff/source/style/xmlnume.cxx b/xmloff/source/style/xmlnume.cxx
index 4c00fab10e96..a5ae61c12543 100644
--- a/xmloff/source/style/xmlnume.cxx
+++ b/xmloff/source/style/xmlnume.cxx
@@ -84,6 +84,7 @@ void SvxXMLNumRuleExport::exportLevelStyle( sal_Int32 nLevel,
     sal_Int16 eAdjust = HoriOrientation::LEFT;
     OUString sPrefix, sSuffix, sListFormat;
     OUString sTextStyleName;
+    bool bIsLegal = false;
     bool bHasColor = false;
     sal_Int32 nColor = 0;
     sal_Int32 nSpaceBefore = 0, nMinLabelWidth = 0, nMinLabelDist = 0;
@@ -125,6 +126,10 @@ void SvxXMLNumRuleExport::exportLevelStyle( sal_Int32 nLevel,
         {
             rProp.Value >>= sListFormat;
         }
+        else if (rProp.Name == "IsLegal")
+        {
+            rProp.Value >>= bIsLegal;
+        }
         else if (rProp.Name == "BulletChar")
         {
             OUString sValue;
@@ -256,6 +261,11 @@ void SvxXMLNumRuleExport::exportLevelStyle( sal_Int32 nLevel,
             GetExport().AddAttribute( XML_NAMESPACE_TEXT, XML_STYLE_NAME,
                     GetExport().EncodeStyleName( sTextStyleName ) );
         }
+        if (bIsLegal)
+        {
+            if (GetExport().getSaneDefaultVersion() & SvtSaveOptions::ODFSVER_EXTENDED)
+                GetExport().AddAttribute(XML_NAMESPACE_LO_EXT, XML_IS_LEGAL, "true");
+        }
         if (!sListFormat.isEmpty())
         {
             if (GetExport().getSaneDefaultVersion() & SvtSaveOptions::ODFSVER_EXTENDED)
diff --git a/xmloff/source/style/xmlnumi.cxx b/xmloff/source/style/xmlnumi.cxx
index 3e8b6fe7253d..c9149a03a255 100644
--- a/xmloff/source/style/xmlnumi.cxx
+++ b/xmloff/source/style/xmlnumi.cxx
@@ -157,6 +157,8 @@ class SvxXMLListLevelStyleContext_Impl : public SvXMLImportContext
     bool            bNum : 1;
     bool            bHasColor : 1;
 
+    bool            m_bIsLegal = false;
+
     void SetRelSize( sal_Int16 nRel ) { nRelSize = nRel; }
     void SetColor( Color nColor )
         { m_nColor = nColor; bHasColor = true; }
@@ -305,6 +307,9 @@ SvxXMLListLevelStyleContext_Impl::SvxXMLListLevelStyleContext_Impl(
         case XML_ELEMENT(LO_EXT, XML_NUM_LIST_FORMAT):
             sListFormat = std::make_optional(aIter.toString());
             break;
+        case XML_ELEMENT(LO_EXT, XML_IS_LEGAL):
+            m_bIsLegal = aIter.toBoolean();
+            break;
         case XML_ELEMENT(STYLE, XML_NUM_LETTER_SYNC):
             if( bNum )
                 sNumLetterSync = aIter.toString();
@@ -522,6 +527,9 @@ Sequence<beans::PropertyValue> SvxXMLListLevelStyleContext_Impl::GetProperties()
 
     aProperties.push_back(comphelper::makePropertyValue("ListFormat", *sListFormat));
 
+    if (m_bIsLegal)
+        aProperties.push_back(comphelper::makePropertyValue("IsLegal", true));
+
     return comphelper::containerToSequence(aProperties);
 }