Add "Find References" to context menu (bug#50067)

The new entry appears next to "Find Definition" and like it only
appears when the context menu was invoked on an identifier.

* lisp/progmodes/prog-mode.el (prog-context-menu): New menu entry.
* lisp/progmodes/xref.el (xref-find-references-at-mouse): New
function, analogous to `xref-find-definitions-at-mouse`.

1 files changed, 14 insertions, 0 deletions

diff --git a/lisp/progmodes/xref.el b/lisp/progmodes/xref.el
index 32fe6b612b3..a8bab47ea25 100644
--- a/lisp/progmodes/xref.el
+++ b/lisp/progmodes/xref.el
@@ -1355,6 +1355,20 @@ This command is intended to be bound to a mouse event."
         (xref-find-definitions identifier)
       (user-error "No identifier here"))))
 
+;;;###autoload
+(defun xref-find-references-at-mouse (event)
+  "Find references to the identifier at or around mouse click.
+This command is intended to be bound to a mouse event."
+  (interactive "e")
+  (let ((identifier
+         (save-excursion
+           (mouse-set-point event)
+           (xref-backend-identifier-at-point (xref-find-backend)))))
+    (if identifier
+        (let ((xref-prompt-for-identifier nil))
+          (xref-find-references identifier))
+      (user-error "No identifier here"))))
+
 (declare-function apropos-parse-pattern "apropos" (pattern))
 
 ;;;###autoload