(Info-revert-find-node): New function.

diff --git a/lisp/info.el b/lisp/info.el
index 05a56ef1c92db232f48f708d7576841175e1331b..836c8287ebef3935edf8b60c02437e59d4ffb9d2 100644 (file)
--- a/lisp/info.el
+++ b/lisp/info.el
@@ -534,6 +534,40 @@ else defaults to \"Top\"."
   (set (make-local-variable 'Info-current-file) t)
   (Info-find-node-2 nil nodename))
 
+;; It's perhaps a bit nasty to kill the *info* buffer to force a re-read,
+;; but at least it keeps this routine (which is only for the benefit of
+;; makeinfo-buffer) out of the way of normal operations.
+;;
+(defun Info-revert-find-node (filename nodename)
+  "Go to an info node FILENAME and NODENAME, re-reading disk contents.
+When *info* is already displaying FILENAME and NODENAME, the window position
+is preserved, if possible."
+  (pop-to-buffer "*info*")
+  (let ((old-filename Info-current-file)
+       (old-nodename Info-current-node)
+       (pcolumn      (current-column))
+       (pline        (count-lines (point-min) (line-beginning-position)))
+       (wline        (count-lines (point-min) (window-start)))
+       (old-history  Info-history)
+       (new-history (and Info-current-file
+                         (list Info-current-file Info-current-node (point)))))
+    (kill-buffer (current-buffer))
+    (Info-find-node filename nodename)
+    (setq Info-history old-history)
+    (if (and (equal old-filename Info-current-file)
+            (equal old-nodename Info-current-node))
+       (progn
+         ;; note goto-line is no good, we want to measure from point-min
+         (beginning-of-buffer)
+         (forward-line wline)
+         (set-window-start (selected-window) (point))
+         (beginning-of-buffer)
+         (forward-line pline)
+         (move-to-column pcolumn))
+      ;; only add to the history when coming from a different file+node
+      (if new-history
+         (setq Info-history (cons new-history Info-history))))))
+
 (defun Info-find-in-tag-table-1 (marker regexp case-fold)
   "Find a node in a tag table.
 MARKER specifies the buffer and position to start searching at.