Merge 1bdf44756d into acedacffef

README.md

@@ -13,6 +13,22 @@ extensions.
 It started as a translation from C of [Sundown][3].
 
 
+About Duzy's fork
+-----------------
+
+The original Blackfirday can not process [empty links][empty-link-issue].
+Empty links could be very useful for holding meta information to be 
+processed by application. For example:
+
+``` markdown
+[](
+anything goes here should be ignored by renderer as the link is empty
+)
+```
+
+In Duzy's fork, the parsing issue of empty links was fixed. Other possible
+modification may happen if needed and differs from the original version.
+
 Installation
 ------------
 
@@ -308,3 +324,5 @@ License
    [4]: https://godoc.org/gopkg.in/russross/blackfriday.v2#Parse "Parse func"
    [5]: https://github.com/microcosm-cc/bluemonday "Bluemonday"
    [6]: https://labix.org/gopkg.in "gopkg.in"
+
+   [empty-link-issue]: https://github.com/russross/blackfriday/pull/402

go.mod

@@ -1 +1 @@
-module github.com/russross/blackfriday/v2
+module github.com/duzy/blackfriday

inline.go

@@ -541,7 +541,9 @@ func link(p *Markdown, data []byte, offset int) (int, *Node) {
 
 		// links need something to click on and somewhere to go
 		if len(uLink) == 0 || (t == linkNormal && txtE <= 1) {
-			return 0, nil
+                        if txtE == 1 && p.extensions&EmptyLink == 0 {
+                                return 0, nil
+                        }
 		}
 	}
 

markdown.go

@@ -47,13 +47,14 @@ const (
 	AutoHeadingIDs                                // Create the heading ID from the text
 	BackslashLineBreak                            // Translate trailing backslashes into line breaks
 	DefinitionLists                               // Render definition lists
+        EmptyLink                                     // Parse empty links
 
 	CommonHTMLFlags HTMLFlags = UseXHTML | Smartypants |
 		SmartypantsFractions | SmartypantsDashes | SmartypantsLatexDashes
 
 	CommonExtensions Extensions = NoIntraEmphasis | Tables | FencedCode |
 		Autolink | Strikethrough | SpaceHeadings | HeadingIDs |
-		BackslashLineBreak | DefinitionLists
+		BackslashLineBreak | DefinitionLists | EmptyLink
 )
 
 // ListType contains bitwise or'ed flags for list and list item objects.