[ 
https://issues.apache.org/jira/browse/DOXIA-616?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17256759#comment-17256759
 ] 

ASF GitHub Bot commented on DOXIA-616:
--------------------------------------

bertysentry commented on a change in pull request #49:
URL: https://github.com/apache/maven-doxia/pull/49#discussion_r550357588



##########
File path: 
doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/MarkdownParser.java
##########
@@ -130,133 +184,98 @@ public void parse( Reader source, Sink sink )
      * @return HTML content generated by flexmark-java
      * @throws IOException passed through
      */
-    String toHtml( Reader source )
+    CharSequence toHtml( Reader source )
         throws IOException
     {
+        // Read the source
         String text = IOUtil.toString( source );
-        MutableDataHolder flexmarkOptions = 
PegdownOptionsAdapter.flexmarkOptions(
-                Extensions.ALL & ~( Extensions.HARDWRAPS | 
Extensions.ANCHORLINKS ) ).toMutable();
-        ArrayList<Extension> extensions = new ArrayList<>();
-        for ( Extension extension : flexmarkOptions.get( 
com.vladsch.flexmark.parser.Parser.EXTENSIONS ) )
-        {
-            extensions.add( extension );
-        }
-
-        extensions.add( FlexmarkDoxiaExtension.create() );
-        flexmarkOptions.set( com.vladsch.flexmark.parser.Parser.EXTENSIONS, 
extensions );
-        flexmarkOptions.set( HtmlRenderer.HTML_BLOCK_OPEN_TAG_EOL, false );
-        flexmarkOptions.set( HtmlRenderer.HTML_BLOCK_CLOSE_TAG_EOL, false );
-        flexmarkOptions.set( HtmlRenderer.MAX_TRAILING_BLANK_LINES, -1 );
-
-        com.vladsch.flexmark.parser.Parser parser = 
com.vladsch.flexmark.parser.Parser.builder( flexmarkOptions )
-                .build();
-        HtmlRenderer renderer = HtmlRenderer.builder( flexmarkOptions )
-                                    .linkResolverFactory( new 
FlexmarkDoxiaLinkResolver.Factory() )
-                                    .build();
-
 
+        // Now, build the HTML document
         StringBuilder html = new StringBuilder( 1000 );
         html.append( "<html>" );
         html.append( "<head>" );
-        Pattern metadataPattern = Pattern.compile( 
MULTI_MARKDOWN_METADATA_SECTION, Pattern.MULTILINE );
-        Matcher metadataMatcher = metadataPattern.matcher( text );
+
+        // First, we interpret the "metadata" section of the document and add 
the corresponding HTML headers
+        Matcher metadataMatcher = METADATA_SECTION_PATTERN.matcher( text );
         boolean haveTitle = false;
         if ( metadataMatcher.find() )
         {
-            metadataPattern = Pattern.compile( MULTI_MARKDOWN_METADATA_ENTRY, 
Pattern.MULTILINE );
-            Matcher lineMatcher = metadataPattern.matcher( 
metadataMatcher.group( 1 ) );
-            boolean first = true;
-            while ( lineMatcher.find() )
+            Matcher entryMatcher = METADATA_ENTRY_PATTERN.matcher( 
metadataMatcher.group( 0 ) );
+            while ( entryMatcher.find() )
             {
-                String key = StringUtils.trimToEmpty( lineMatcher.group( 1 ) );
-                if ( first )
-                {
-                    boolean found = false;
-                    for ( String k : STANDARD_METADATA_KEYS )
-                    {
-                        if ( k.equalsIgnoreCase( key ) )
-                        {
-                            found = true;
-                            break;
-                        }
-                    }
-                    if ( !found )
-                    {
-                        break;
-                    }
-                    first = false;
-                }
-                String value = StringUtils.trimToEmpty( lineMatcher.group( 2 ) 
);
+                String key = entryMatcher.group( 1 );
+                String value = entryMatcher.group( 2 );
                 if ( "title".equalsIgnoreCase( key ) )
                 {
                     haveTitle = true;
                     html.append( "<title>" );
-                    html.append( StringEscapeUtils.escapeXml( value ) );
+                    html.append( HtmlTools.escapeHTML( value, false ) );

Review comment:
       The only difference between *false* and *true* in 
*HtmlTools.escapeHTML()* is the handling of the apostrophe (should it be 
replaced with `&apos;` or not). As we're inside a `<title>` element, there is 
no need to replace the apostrophe.
   
   However, on line 218 and 221, we're inside the attribute of an element, i.e. 
inside quotes, and that's why we need to escape the apostrophe here.
   
   Note that the presence (and absence) of apostrophe in the title and 
metadatas is covered with unit tests (see *testMetadataSinkEvent()* in 
**MarkdownParserTest.java**)




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> Markdown: Properly expose the language specified in fenced code blocks
> ----------------------------------------------------------------------
>
>                 Key: DOXIA-616
>                 URL: https://issues.apache.org/jira/browse/DOXIA-616
>             Project: Maven Doxia
>          Issue Type: Improvement
>          Components: Module - Markdown
>    Affects Versions: 1.8, 1.9, 1.9.1
>            Reporter: Bertrand Martin
>            Assignee: Michael Osipov
>            Priority: Major
>             Fix For: 1.9.2
>
>
> h1. Use Case
> Writers can specify the language used in a fenced code block (typically for 
> syntax highlighting), as in the example below:
> {code}
> ```java
> System.out.println("Beautiful\n");
> ```
> {code}
> Currently, the Doxia module for Markdown does not expose this information 
> ("java") in the produced HTML, so a Maven skin (or frontend renderer) cannot 
> leverage it.
> Produced HTML:
> {code:html}
> <div class="source"> <!-- No mention of Java :-( -->
> <pre>
> System.out.println("Beautiful\n");
> </pre>
> </div>
> {code}
> Wanted result:
> {code:html}
> <div class="source java"> <!-- :-) -->
> <pre>
> System.out.println("Beautiful\n");
> </pre>
> </div>
> {code}
> h1. Specification
> Un-comment this block:
> https://github.com/apache/maven-doxia/blob/c439714e8f4a9e86f9962ac6be9a0077ae9b4d30/doxia-modules/doxia-module-markdown/src/main/java/org/apache/maven/doxia/module/markdown/FlexmarkDoxiaNodeRenderer.java#L103
> This should do the trick.



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