org-export: Correctly resolve fuzzy links whose path starts with *

* contrib/lisp/org-export.el (org-export-resolve-fuzzy-link):
  Correctly resolve fuzzy links whose path starts with *
* testing/lisp/test-org-export.el: Add tests.

contrib/lisp/org-export.el

@@ -2949,18 +2949,19 @@ Return value can be an object, an element, or nil:
 - Otherwise, return nil.
 
 Assume LINK type is \"fuzzy\"."
-  (let ((path (org-element-property :path link)))
+  (let* ((path (org-element-property :path link))
+	 (match-title-p (eq (aref path 0) ?*)))
     (cond
      ;; First try to find a matching "<<path>>" unless user specified
      ;; he was looking for an headline (path starts with a *
      ;; character).
-     ((and (not (eq (substring path 0 1) ?*))
+     ((and (not match-title-p)
 	   (loop for target in (plist-get info :target-list)
 		 when (string= (org-element-property :value target) path)
 		 return target)))
      ;; Then try to find an element with a matching "#+NAME: path"
      ;; affiliated keyword.
-     ((and (not (eq (substring path 0 1) ?*))
+     ((and (not match-title-p)
 	   (org-element-map
 	    (plist-get info :parse-tree) org-element-all-elements
 	    (lambda (el)
@@ -2972,29 +2973,31 @@ Assume LINK type is \"fuzzy\"."
      ;; is found, return it, otherwise return nil.
      (t
       (let ((find-headline
-	       (function
-		;; Return first headline whose `:raw-value' property
-		;; is NAME in parse tree DATA, or nil.
-		(lambda (name data)
-		  (org-element-map
-		   data 'headline
-		   (lambda (headline)
-		     (when (string=
-			    (org-element-property :raw-value headline)
-			    name)
-		       headline))
-		   info 'first-match)))))
-	  ;; Search among headlines sharing an ancestor with link,
-	  ;; from closest to farthest.
-	  (or (catch 'exit
-		(mapc
-		 (lambda (parent)
-		   (when (eq (org-element-type parent) 'headline)
-		     (let ((foundp (funcall find-headline path parent)))
-		       (when foundp (throw 'exit foundp)))))
-		 (org-export-get-genealogy link info)) nil)
-	      ;; No match with a common ancestor: try the full parse-tree.
-	      (funcall find-headline path (plist-get info :parse-tree))))))))
+	     (function
+	      ;; Return first headline whose `:raw-value' property
+	      ;; is NAME in parse tree DATA, or nil.
+	      (lambda (name data)
+		(org-element-map
+		 data 'headline
+		 (lambda (headline)
+		   (when (string=
+			  (org-element-property :raw-value headline)
+			  name)
+		     headline))
+		 info 'first-match)))))
+	;; Search among headlines sharing an ancestor with link,
+	;; from closest to farthest.
+	(or (catch 'exit
+	      (mapc
+	       (lambda (parent)
+		 (when (eq (org-element-type parent) 'headline)
+		   (let ((foundp (funcall find-headline path parent)))
+		     (when foundp (throw 'exit foundp)))))
+	       (org-export-get-genealogy link info)) nil)
+	    ;; No match with a common ancestor: try the full parse-tree.
+	    (funcall find-headline
+		     (if match-title-p (substring path 1) path)
+		     (plist-get info :parse-tree))))))))
 
 (defun org-export-resolve-id-link (link info)
   "Return headline referenced as LINK destination.

testing/lisp/test-org-export.el

@@ -478,6 +478,73 @@ Paragraph[fn:1]"
 
 ;;; Links
 
+(ert-deftest test-org-export/fuzzy-link ()
+  "Test fuzzy links specifications."
+  ;; 1. Links to invisible (keyword) targets should be ignored.
+  (org-test-with-parsed-data
+      "Paragraph.\n#+TARGET: Test\n[[Test]]"
+    (should-not
+     (org-element-map
+      tree 'link
+      (lambda (link)
+	(org-export-get-ordinal
+	 (org-export-resolve-fuzzy-link link info) info)) info)))
+  ;; 2. Link to an headline should return headline's number.
+  (org-test-with-parsed-data
+      "Paragraph.\n* Head1\n* Head2\n* Head3\n[[Head2]]"
+    (should
+     ;; Note: Headline's number is in fact a list of numbers.
+     (equal '(2)
+	    (org-element-map
+	     tree 'link
+	     (lambda (link)
+	       (org-export-get-ordinal
+		(org-export-resolve-fuzzy-link link info) info)) info t))))
+  ;; 3. Link to a target in an item should return item's number.
+  (org-test-with-parsed-data
+      "- Item1\n  - Item11\n  - <<test>>Item12\n- Item2\n\n\n[[test]]"
+    (should
+     ;; Note: Item's number is in fact a list of numbers.
+     (equal '(1 2)
+	    (org-element-map
+	     tree 'link
+	     (lambda (link)
+	       (org-export-get-ordinal
+		(org-export-resolve-fuzzy-link link info) info)) info t))))
+  ;; 4. Link to a target in a footnote should return footnote's
+  ;;    number.
+  (org-test-with-parsed-data "
+Paragraph[1][2][fn:lbl3:C<<target>>][[test]][[target]]\n[1] A\n\n[2] <<test>>B"
+    (should
+     (equal '(2 3)
+	    (org-element-map
+	     tree 'link
+	     (lambda (link)
+	       (org-export-get-ordinal
+		(org-export-resolve-fuzzy-link link info) info)) info))))
+  ;; 5. Link to a named element should return sequence number of that
+  ;;    element.
+  (org-test-with-parsed-data
+      "#+NAME: tbl1\n|1|2|\n#+NAME: tbl2\n|3|4|\n#+NAME: tbl3\n|5|6|\n[[tbl2]]"
+    (should
+     (= 2
+	(org-element-map
+	 tree 'link
+	 (lambda (link)
+	   (org-export-get-ordinal
+	    (org-export-resolve-fuzzy-link link info) info)) info t))))
+  ;; 6. Link to a target not within an item, a table, a footnote
+  ;;    reference or definition should return section number.
+  (org-test-with-parsed-data
+      "* Head1\n* Head2\nParagraph<<target>>\n* Head3\n[[target]]"
+    (should
+     (equal '(2)
+	    (org-element-map
+	     tree 'link
+	     (lambda (link)
+	       (org-export-get-ordinal
+		(org-export-resolve-fuzzy-link link info) info)) info t)))))
+
 (ert-deftest test-org-export/resolve-coderef ()
   "Test `org-export-resolve-coderef' specifications."
   (let ((org-coderef-label-format "(ref:%s)"))
@@ -543,72 +610,59 @@ Another text. (ref:text)
 	"#+BEGIN_EXAMPLE -l \"[ref:%s]\"\nText. [ref:text]\n#+END_EXAMPLE"
       (should (equal (org-export-resolve-coderef "text" info) "text")))))
 
-(ert-deftest test-org-export/resolve-fuzzy-link ()
+(ert-deftest test-org-exprot/resolve-fuzzy-link ()
   "Test `org-export-resolve-fuzzy-link' specifications."
-  ;; 1. Links to invisible (keyword) targets should be ignored.
-  (org-test-with-parsed-data
-      "Paragraph.\n#+TARGET: Test\n[[Test]]"
-    (should-not
-     (org-element-map
-      tree 'link
-      (lambda (link)
-	(org-export-get-ordinal
-	 (org-export-resolve-fuzzy-link link info) info)) info)))
-  ;; 2. Link to an headline should return headline's number.
-  (org-test-with-parsed-data
-      "Paragraph.\n* Head1\n* Head2\n* Head3\n[[Head2]]"
+  ;; 1. Match target objects.
+  (org-test-with-parsed-data "<<target>> [[target]]"
     (should
-     ;; Note: Headline's number is in fact a list of numbers.
-     (equal '(2)
-	    (org-element-map
-	     tree 'link
-	     (lambda (link)
-	       (org-export-get-ordinal
-		(org-export-resolve-fuzzy-link link info) info)) info t))))
-  ;; 3. Link to a target in an item should return item's number.
-  (org-test-with-parsed-data
-      "- Item1\n  - Item11\n  - <<test>>Item12\n- Item2\n\n\n[[test]]"
+     (org-export-resolve-fuzzy-link
+      (org-element-map tree 'link 'identity info t) info)))
+  ;; 2. Match target elements.
+  (org-test-with-parsed-data "#+TARGET: target\n[[target]]"
     (should
-     ;; Note: Item's number is in fact a list of numbers.
-     (equal '(1 2)
-	    (org-element-map
-	     tree 'link
-	     (lambda (link)
-	       (org-export-get-ordinal
-		(org-export-resolve-fuzzy-link link info) info)) info t))))
-  ;; 4. Link to a target in a footnote should return footnote's
-  ;;    number.
-  (org-test-with-parsed-data "
-Paragraph[1][2][fn:lbl3:C<<target>>][[test]][[target]]\n[1] A\n\n[2] <<test>>B"
+     (org-export-resolve-fuzzy-link
+      (org-element-map tree 'link 'identity info t) info)))
+  ;; 3. Match named elements.
+  (org-test-with-parsed-data "#+NAME: target\nParagraph\n\n[[target]]"
     (should
-     (equal '(2 3)
-	    (org-element-map
-	     tree 'link
-	     (lambda (link)
-	       (org-export-get-ordinal
-		(org-export-resolve-fuzzy-link link info) info)) info))))
-  ;; 5. Link to a named element should return sequence number of that
-  ;;    element.
+     (org-export-resolve-fuzzy-link
+      (org-element-map tree 'link 'identity info t) info)))
+  ;; 4. Match exact headline's name.
+  (org-test-with-parsed-data "* My headline\n[[My headline]]"
+    (should
+     (org-export-resolve-fuzzy-link
+      (org-element-map tree 'link 'identity info t) info)))
+  ;; 5. Targets objects have priority over named elements and headline
+  ;;    titles.
   (org-test-with-parsed-data
-      "#+NAME: tbl1\n|1|2|\n#+NAME: tbl2\n|3|4|\n#+NAME: tbl3\n|5|6|\n[[tbl2]]"
+      "* target\n#+NAME: target\n<<target>>\n\n[[target]]"
     (should
-     (= 2
-	(org-element-map
-	 tree 'link
-	 (lambda (link)
-	   (org-export-get-ordinal
-	    (org-export-resolve-fuzzy-link link info) info)) info t))))
-  ;; 6. Link to a target not within an item, a table, a footnote
-  ;;    reference or definition should return section number.
+     (eq 'target
+	 (org-element-type
+	  (org-export-resolve-fuzzy-link
+	   (org-element-map tree 'link 'identity info t) info)))))
+  ;; 6. Named elements have priority over headline titles.
   (org-test-with-parsed-data
-      "* Head1\n* Head2\nParagraph<<target>>\n* Head3\n[[target]]"
+      "* target\n#+NAME: target\nParagraph\n\n[[target]]"
     (should
-     (equal '(2)
-	    (org-element-map
-	     tree 'link
-	     (lambda (link)
-	       (org-export-get-ordinal
-		(org-export-resolve-fuzzy-link link info) info)) info t)))))
+     (eq 'paragraph
+	 (org-element-type
+	  (org-export-resolve-fuzzy-link
+	   (org-element-map tree 'link 'identity info t) info)))))
+  ;; 7. If link's path starts with a "*", only match headline titles,
+  ;;    though.
+  (org-test-with-parsed-data
+      "* target\n#+NAME: target\n<<target>>\n\n[[*target]]"
+    (should
+     (eq 'headline
+	 (org-element-type
+	  (org-export-resolve-fuzzy-link
+	   (org-element-map tree 'link 'identity info t) info)))))
+  ;; 8. Return nil if no match.
+  (org-test-with-parsed-data "[[target]]"
+    (should-not
+     (org-export-resolve-fuzzy-link
+      (org-element-map tree 'link 'identity info t) info))))
 
 (ert-deftest test-org-export/resolve-id-link ()
   "Test `org-export-resolve-id-link' specifications."