Merge from mainline.

[gnu-emacs] / lisp / help.el

diff --git a/lisp/help.el b/lisp/help.el
index 6c6bd76ec4b4fc80e13c506745fd5fa9c279db8b..e148e5ef6abba5be4edbfff0218259f3bb3befb4 100644 (file)
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -1,7 +1,6 @@
 ;;; help.el --- help commands for Emacs
 
-;; Copyright (C) 1985, 1986, 1993, 1994, 1998, 1999, 2000, 2001, 2002,
-;;   2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+;; Copyright (C) 1985-1986, 1993-1994, 1998-2011
 ;;   Free Software Foundation, Inc.
 
 ;; Maintainer: FSF
@@ -872,7 +871,17 @@ whose documentation describes the minor mode."
             (let ((start (point)))
               (insert (format-mode-line mode nil nil buffer))
               (add-text-properties start (point) '(face bold)))))
-       (princ " mode:\n")
+       (princ " mode")
+       (let* ((mode major-mode)
+              (file-name (find-lisp-object-file-name mode nil)))
+         (when file-name
+           (princ (concat " defined in `" (file-name-nondirectory file-name) "'"))
+           ;; Make a hyperlink to the library.
+           (with-current-buffer standard-output
+             (save-excursion
+               (re-search-backward "`\\([^`']+\\)'" nil t)
+               (help-xref-button 1 'help-function-def mode file-name)))))
+       (princ ":\n")
        (princ (documentation major-mode)))))
   ;; For the sake of IELM and maybe others
   nil)