resolves asciidoctor#752 implement start line number for source listi…

…ng (rouge)
mojavelinux · Feb 13, 2017 · f31fe3d · f31fe3d
1 parent 34411c2
commit f31fe3d
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Showing 2 changed files with 6 additions and 3 deletions.
diff --git a/lib/asciidoctor-pdf/converter.rb b/lib/asciidoctor-pdf/converter.rb
@@ -1238,7 +1238,9 @@ def convert_listing_or_literal node
       bg_color_override = formatter.background_color
       source_string, conum_mapping = extract_conums source_string
       # NOTE trailing endline is added to address https://github.com/jneen/rouge/issues/279
-      fragments = formatter.format (lexer.lex %(#{source_string}#{LF})), line_numbers: (node.attr? 'linenums')
+      fragments = formatter.format (lexer.lex %(#{source_string}#{LF})),
+          line_numbers: (node.attr? 'linenums'),
+          start_line: (node.attr 'start').to_i
       # NOTE cleanup trailing endline (handled in rouge_ext/formatters/prawn instead)
       #fragments.last[:text] == LF ? fragments.pop : fragments.last[:text].chop!
       conum_mapping ? (restore_conums fragments, conum_mapping) : fragments

diff --git a/lib/asciidoctor-pdf/rouge_ext/formatters/prawn.rb b/lib/asciidoctor-pdf/rouge_ext/formatters/prawn.rb
@@ -42,8 +42,9 @@ def format tokens, opts = {}
 
   def stream tokens, opts = {}
     if opts[:line_numbers]
-      # TODO implement line number start (offset)
-      linenum = 0
+      if (linenum = opts[:start_line]) > 0
+        linenum -= 1
+      end
       fragments = []
       fragments << (create_linenum_fragment linenum += 1)
       tokens.each do |tok, val|