XEmacs 21.2-b2

[chise/xemacs-chise.git.1] / lisp / help.el

diff --git a/lisp/help.el b/lisp/help.el
index 5f43c0c..8590638 100644 (file)
--- a/lisp/help.el
+++ b/lisp/help.el
@@ -1416,4 +1416,25 @@ after the listing is made.)"
                (if cmd (princ " ")))))
          (terpri))))))
 
                (if cmd (princ " ")))))
          (terpri))))))
 

+;; Stop gap for 21.0 untill we do help-char etc properly.
+(defun help-keymap-with-help-key (keymap form)
+  "Return a copy of KEYMAP with an help-key binding according to help-char
+ invoking FORM like help-form.  An existing binding is not overridden.
+ If FORM is nil then no binding is made."
+  (let ((map (copy-keymap keymap))
+       (key (if (characterp help-char)
+                (vector (character-to-event help-char))
+              help-char)))
+    (when (and form key (not (lookup-key map key)))
+      (define-key map key
+       `(lambda () (interactive) (help-print-help-form ,form))))
+    map))
+
+(defun help-print-help-form (form)
+  (let ((string (eval form)))
+    (if (stringp string)
+       (with-displaying-help-buffer
+        (insert string)))))
+
+

 ;;; help.el ends here
 ;;; help.el ends here