subclass ClauseCounter, to allow it to be overridden in flavours: met…

…anorma/metanorma-jis#228

lib/isodoc/xref.rb

@@ -1,5 +1,6 @@
 require_relative "xref/xref_anchor"
 require_relative "xref/xref_counter"
+require_relative "xref/xref_counter_types"
 require_relative "xref/xref_gen_seq"
 require_relative "xref/xref_gen"
 require_relative "xref/xref_sect_gen"

lib/isodoc/xref/xref_counter_types.rb

@@ -0,0 +1,11 @@
+require_relative "xref_counter"
+
+module IsoDoc
+  module XrefGen
+    class ClauseCounter < Counter
+      def initialize(num = 0, opts = { numerals: :arabic })
+        super
+      end
+    end
+  end
+end

lib/isodoc/xref/xref_gen.rb

@@ -33,8 +33,7 @@ def termnote_label(note)
       end
 
       def increment_label(elems, node, counter, increment: true)
-        return "" if elems.size == 1 && !node["number"]
-
+        elems.size == 1 && !node["number"] and return ""
         counter.increment(node) if increment
         " #{counter.print}"
       end

lib/isodoc/xref/xref_sect_gen.rb

@@ -56,7 +56,7 @@ def preface_anchor_names(xml)
       end
 
       def main_anchor_names(xml)
-        n = Counter.new
+        n = ClauseCounter.new
         clause_order_main(xml).each do |a|
           xml.xpath(ns(a[:path])).each do |c|
             section_names(c, n, 1)