v4: merge v5 lib (5.0.10)sisu_4.1.10

* output structure by, add monolingual alt for :filetype & :filename, step 1
* output structure by, monolingual alternative for :filetype or :filename
   without language code, if document is in default language
  * set a default language, 'en' or as specified
  * set in rc file or from command line instruction
    * command line e.g.
      sisu -hv --monolingual --by-filename sisu_markup.sst
      sisu -3v --monolingual --by-filetype sisu_manual.ssm
    * sisurc.yml lingual: 'mono' | 'multi' lingual: 'mono'
  * note: output by :filetype is roughly equivalent to what monolingual output
    by :language would be
  * allow command line setting of default language using language code
    --default-language='en' --default-lang-en if used together with
    --monolingual and --by-filetype or --by-filename the selected default
    language document will not have a language code in the output filename
* output structure by, monolingual alternative, documentation
* cgi helper script, sample search form, single form, monolingual option
  * single cgi form, (with different internal variables set for output types)

1 files changed, 1 insertions, 10 deletions

diff --git a/lib/sisu/v4/param.rb b/lib/sisu/v4/param.rb
index fb2061a7..ed70c9c4 100644
--- a/lib/sisu/v4/param.rb
+++ b/lib/sisu/v4/param.rb
@@ -841,16 +841,7 @@ module SiSU_Param
         @authors,@topic_register_array,@papersize_array=[],[],[]
         @lvs=[nil,0,0,0,0,0,0]
         @emphasis_set_to='bold'
-        @lang_code_insert=if @opt.act[:output_by][:set]==:language
-          ''
-        elsif @opt.act[:output_by][:set]==:filetype \
-        or @opt.act[:output_by][:set]==:filename
-          ".#{@opt.lng}"
-        elsif @opt.dir_structure_by ==:language
-          ''
-        else
-          ".#{@opt.lng}"
-        end
+        @lang_code_insert=SiSU_Env::FilenameLanguageCodeInsert.new(@opt).language_code_insert
         @footer_links= { left: { say: '', url: '' }, center: { say: '', url: '' } }
         @rgx_image=/(?:^|[^_\\])\{(?:\s*|\~\^\s+)(\S+?\.(?:png|jpg|gif)\b)/m
         @rgx_audio=/\{\s*(\S+?\.(?:mp3|ogg))/