Make TAB and M-TAB run widget-forward and widget-backward (bug#25091)

* lisp/gnus/mm-decode (mm-convert-shr-links): Avoid `shr-next-link'
and `shr-previous-link' so TAB and M-TAB run `widget-forward' and
`widget-backward' instead (bug#25091).

1 files changed, 4 insertions, 0 deletions

diff --git a/lisp/gnus/mm-decode.el b/lisp/gnus/mm-decode.el
index 4b3f10c2e19..3127a22e41d 100644
--- a/lisp/gnus/mm-decode.el
+++ b/lisp/gnus/mm-decode.el
@@ -1859,6 +1859,10 @@ If RECURSIVE, search recursively."
         (dolist (key (where-is-internal #'widget-button-click widget-keymap))
           (unless (lookup-key keymap key)
             (define-key keymap key #'ignore)))
+        ;; Avoid `shr-next-link' and `shr-previous-link' in `keymap' so
+        ;; TAB and M-TAB run `widget-forward' and `widget-backward' instead.
+        (substitute-key-definition 'shr-next-link nil keymap)
+        (substitute-key-definition 'shr-previous-link nil keymap)
         (dolist (overlay (overlays-at start))
           (overlay-put overlay 'face nil))
         (setq start end)))))