bug#58973: tab navigation in EWW misses textarea and select

[Nicolas Graner <nicolas@graner.name>]

In EWW mode, the function shr-next-link moves to the next active area,
which may be a link or an 'input' tag. To make tab navigation in forms
really operational, it should also stop at 'textarea' and 'select' tags.

Below is my suggested patch.

Hope this helps,
Nicolas

diff --git a/lisp/net/eww.el b/lisp/net/eww.el
index 414de931c4..3799ef96e8 100644
--- a/lisp/net/eww.el
+++ b/lisp/net/eww.el
@@ -1596,7 +1596,8 @@ eww-tag-textarea
 		       (list :eww-form eww-form
 			     :value value
 			     :type "textarea"
-			     :name (dom-attr dom 'name)))))
+			     :name (dom-attr dom 'name)))
+    (put-text-property start (1+ start) 'shr-tab-stop t)))
 
 (defun eww-tag-input (dom)
   (let ((type (downcase (or (dom-attr dom 'type) "text")))
@@ -1660,7 +1661,8 @@ eww-tag-select
       (add-face-text-property start (point) 'eww-form-select)
       (put-text-property start (point) 'keymap eww-select-map)
       (unless (= start (point))
-       (put-text-property start (1+ start) 'help-echo "select field"))
+       (put-text-property start (1+ start) 'help-echo "select field")
+       (put-text-property start (1+ start) 'shr-tab-stop t))
       (shr-ensure-paragraph))))
 
 (defun eww-select-display (select)