Update TDEL10n module

+ Add new options to function tde_l10n_prepare_xml
-- override the context by using the tag attribute
-- preserve / remove leading empty lines

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

modules/TDEL10n.cmake

@@ -606,7 +606,7 @@ function( tde_l10n_prepare_xml )
   unset( _target )
   unset( _context )
   set( _tags "[tT][eE][xX][tT]|title|string|whatsthis|tooltip|label" )
-  set( _preserve "line-wrap" "spaces-leading" "spaces-trailing" "spaces-multi" )
+  set( _preserve "line-wrap" "lines-leading" "spaces-leading" "spaces-trailing" "spaces-multi" )
   set( _no_c_format 1 )
   unset( _directive )
   set( _var _source )
@@ -712,14 +712,19 @@ function( tde_l10n_prepare_xml )
       if( NOT _xml_inside )
         if( "${_xml_line}" MATCHES "<(${_tags})[^>]*>" )
           set( _xml_inside 1 )
+          set( _xml_context "${_context}" )
           string( REGEX MATCH "<(${_tags})[^>]*>(.*)" _xml_line "${_xml_line}" )
+          string( REGEX MATCH "^<(${_tags})( [^>]*)+>" _xml_attr "${_xml_line}" )
+          if( _xml_attr AND "${_xml_attr}" MATCHES " context=\"([^\"]*)\"" )
+            string( REGEX REPLACE ".* context=\"([^\"]*)\".*" "\\1" _xml_context "${_xml_attr}" )
+          endif( )
           string( REGEX REPLACE "^<(${_tags})[^>]*>(.*)" "\\2" _xml_line "${_xml_line}" )
           set( _xml_line_prefix "i18n(" )
           if( _no_c_format )
             set( _xml_line_prefix "${_xml_line_prefix}/* xgettext: no-c-format */" )
           endif( )
-          if( _context )
-            set( _xml_line_prefix "${_xml_line_prefix}\"${_context}\", " )
+          if( _xml_context )
+            set( _xml_line_prefix "${_xml_line_prefix}\"${_xml_context}\", " )
           endif( )
           set( _xml_tag_empty 1 )
         else( )
@@ -755,7 +760,10 @@ function( tde_l10n_prepare_xml )
 
         if( _xml_inside )
           if( ";${_preserve};" MATCHES ";line-wrap;" )
-            set( _xml_line "${_xml_line}\\n" )
+            if( ";${_preserve};" MATCHES ";lines-leading;"
+                OR NOT "${_xml_line}" STREQUAL "" OR NOT _xml_tag_empty )
+              set( _xml_line "${_xml_line}\\n" )
+            endif( )
           elseif( NOT "${_xml_line}" STREQUAL "" AND NOT _xml_tag_empty )
             set( _xml_line " ${_xml_line}" )
           endif( )