support wiki

ext/commonmarker/src/node.rs

@@ -2,7 +2,7 @@ use comrak::nodes::{
     Ast as ComrakAst, AstNode as ComrakAstNode, ListDelimType, ListType, NodeCode, NodeCodeBlock,
     NodeDescriptionItem, NodeFootnoteDefinition, NodeFootnoteReference, NodeHeading, NodeHtmlBlock,
     NodeLink, NodeList, NodeMath, NodeMultilineBlockQuote, NodeShortCode, NodeTable,
-    NodeValue as ComrakNodeValue, TableAlignment,
+    NodeValue as ComrakNodeValue, NodeWikiLink, TableAlignment,
 };
 use comrak::{arena_tree::Node as ComrakNode, ComrakOptions};
 use magnus::RArray;
@@ -453,6 +453,15 @@ impl CommonmarkerNode {
             }
 
             "escaped" => ComrakNodeValue::Escaped,
+
+            "wikilink" => {
+                let kwargs =
+                    scan_args::get_kwargs::<_, (String,), (), ()>(args.keywords, &["url"], &[])?;
+
+                let (url,) = kwargs.required;
+
+                ComrakNodeValue::WikiLink(NodeWikiLink { url })
+            }
             _ => panic!("unknown node type {}", node_type),
         };
 
@@ -539,6 +548,7 @@ impl CommonmarkerNode {
             ComrakNodeValue::MultilineBlockQuote(_) => Symbol::new("multiline_block_quote"),
             ComrakNodeValue::Escaped => Symbol::new("escaped"),
             ComrakNodeValue::Math(..) => Symbol::new("math"),
+            ComrakNodeValue::WikiLink(..) => Symbol::new("wikilink"),
         }
     }
 

ext/commonmarker/src/options.rs

@@ -86,6 +86,8 @@ const EXTENSION_SHORTCODES: &str = "shortcodes";
 const EXTENSION_MULTILINE_BLOCK_QUOTES: &str = "multiline_block_quotes";
 const EXTENSION_MATH_DOLLARS: &str = "math_dollars";
 const EXTENSION_MATH_CODE: &str = "math_code";
+const EXTENSION_WIKILINKS_TITLE_AFTER_PIPE: &str = "wikilinks_title_after_pipe";
+const EXTENSION_WIKILINKS_TITLE_BEFORE_PIPE: &str = "wikilinks_title_before_pipe";
 
 fn iterate_extension_options(comrak_options: &mut ComrakOptions, options_hash: RHash) {
     options_hash
@@ -138,6 +140,14 @@ fn iterate_extension_options(comrak_options: &mut ComrakOptions, options_hash: R
                 Ok(Cow::Borrowed(EXTENSION_MATH_CODE)) => {
                     comrak_options.extension.math_code = TryConvert::try_convert(value)?;
                 }
+                Ok(Cow::Borrowed(EXTENSION_WIKILINKS_TITLE_AFTER_PIPE)) => {
+                    comrak_options.extension.wikilinks_title_after_pipe =
+                        TryConvert::try_convert(value)?;
+                }
+                Ok(Cow::Borrowed(EXTENSION_WIKILINKS_TITLE_BEFORE_PIPE)) => {
+                    comrak_options.extension.wikilinks_title_before_pipe =
+                        TryConvert::try_convert(value)?;
+                }
                 _ => {}
             }
             Ok(ForEach::Continue)

lib/commonmarker/config.rb

@@ -34,6 +34,8 @@ module Config
         multiline_block_quotes: false,
         math_dollars: false,
         math_code: false,
+        wikilinks_title_before_pipe: false,
+        wikilinks_title_after_pipe: false,
       },
       format: [:html].freeze,
     }.freeze

test/node/creation_test.rb

@@ -44,6 +44,7 @@ def test_it_can_make_all_the_nodes
       [:math, dollar_math: true, display_math: false, literal: "$a+b=2$"],
       [:multiline_block_quote, fence_length: 2, fence_offset: 0],
       [:escaped],
+      [:wikilink, url: "www.yetto.app/billy.png"],
     ]
     node_types.each do |type, arguments|
       node = arguments.nil? ? Commonmarker::Node.new(type) : Commonmarker::Node.new(type, **arguments)

test/wikilinks_test.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class WikilinksTest < Minitest::Test
+  def test_works_with_after_pipe
+    md = <<~MARKDOWN
+      [[url|link label]]
+    MARKDOWN
+
+    expected = <<~HTML
+      <p><a href="url" data-wikilink="true">link label</a></p>
+    HTML
+
+    assert_equal(expected, Commonmarker.to_html(md, options: { extension: { wikilinks_title_after_pipe: true } }))
+  end
+
+  def test_works_with_before_pipe
+    md = <<~MARKDOWN
+      [[link label|url]]
+    MARKDOWN
+
+    expected = <<~HTML
+      <p><a href="url" data-wikilink="true">link label</a></p>
+    HTML
+
+    assert_equal(expected, Commonmarker.to_html(md, options: { extension: { wikilinks_title_before_pipe: true } }))
+  end
+end