polytex.rb in polytexnic-0.6.9

- old
+ new

@@ -39,10 +39,11 @@
         # Override the header ordering, which starts with 'section' by default.
         lh = 'chapter,section,subsection,subsubsection,paragraph,subparagraph'
         kramdown = Kramdown::Document.new(cleaned_markdown, latex_headers: lh)
         @source = kramdown.to_latex.tap do |polytex|
                     remove_comments(polytex)
+                    convert_includegraphics(polytex)
                     convert_tt(polytex)
                     restore_math(polytex, math_cache)
                     restore_hashed_content(polytex, cache)
                   end
       end
@@ -132,33 +133,35 @@
           elsif line =~ /^```\s*$/        # basic code fences
             while (line = lines.shift) && !line.match(/^```\s*$/)
               output << indentation + line
             end
             output << "\n"
-          elsif line =~ /^```(\w+)\s*$/   # syntax-highlighted code fences
+          elsif line =~ /^```(\w+)(,\s*options:.*)?$/  # highlighted fences
             language = $1
+            options  = $2
             code = []
             while (line = lines.shift) && !line.match(/^```\s*$/) do
               code << line
             end
             code = code.join("\n")
-            key = digest(code)
-            code_cache[key] = [code, language]
+            data = [code, language, false, options]
+            key = digest(data.join("--"))
+            code_cache[key] = data
             output << key
           else
             output << line
           end
         end
         output.join("\n")
       end
 
-      # # Removes comments.
-      # # The main reason for doing this is so that commented-out cached objects,
-      # # such as '% <hash of a code sample>', get removed.
-      # # Code like '%= lang:ruby' gets preserved.
-      # def strip_comments(text)
-      #   text.gsub!(/^%.*$/, '')
-      # end
+      # Converts \includegraphics to \image.
+      # The reason is that raw \includegraphics is almost always too wide
+      # in the PDF. Instead, we use the custom-defined \image command, which
+      # is specifically designed to fix this issue.
+      def convert_includegraphics(text)
+        text.gsub!('\includegraphics', '\image')
+      end
 
       # Converts {tt ...} to \kode{...}
       # This effectively converts `inline code`, which kramdown sets as
       # {\tt inline code}, to PolyTeX's native \kode command, which in
       # turns allows inline code to be separately styled.
\ No newline at end of file