(rmail-last-rmail-file): Initialize to a file name.

[bpt/emacs.git] / lisp / subr.el

diff --git a/lisp/subr.el b/lisp/subr.el
index 9759799..031c7ff 100644 (file)
--- a/lisp/subr.el
+++ b/lisp/subr.el
@@ -181,6 +181,42 @@ in KEYMAP as NEWDEF those chars which are defined as OLDDEF in OLDMAP."
                (setq i (1+ i))))))
       (setq scan (cdr scan)))))
 
+(defun define-key-after (keymap key definition after)
+  "Add binding in KEYMAP for KEY => DEFINITION, right after AFTER's binding.
+This is like `define-key' except that the binding for KEY is placed
+just after the binding for the event AFTER, instead of at the beginning
+of the map.
+The order matters when the keymap is used as a menu.
+KEY must contain just one event type--it must be a string or vector
+of length 1."
+  (or (keymapp keymap)
+      (signal 'wrong-type-argument (list 'keymapp keymap)))
+  (if (> (length key) 1)
+      (error "multi-event key specified in `define-key-after'"))
+  (let ((tail keymap) done inserted
+       (first (aref key 0)))
+    (while (and (not done) tail)
+      ;; Delete any earlier bindings for the same key.
+      (if (eq (car-safe (car (cdr tail))) first)
+         (setcdr tail (cdr (cdr tail))))
+      ;; When we reach AFTER's binding, insert the new binding after.
+      ;; If we reach an inherited keymap, insert just before that.
+      ;; If we reach the end of this keymap, insert at the end.
+      (if (or (eq (car-safe (car tail)) after)
+             (eq (car (cdr tail)) 'keymap)
+             (null (cdr tail)))
+         (progn
+           ;; Stop the scan only if we find a parent keymap.
+           ;; Keep going past the inserted element
+           ;; so we can delete any duplications that come later.
+           (if (eq (car (cdr tail)) 'keymap)
+               (setq done t))
+           ;; Don't insert more than once.
+           (or inserted
+               (setcdr tail (cons (cons (aref key 0) definition) (cdr tail))))
+           (setq inserted t)))
+      (setq tail (cdr tail)))))
+
 (defun keyboard-translate (from to)
   "Translate character FROM to TO at a low level.
 This function creates a `keyboard-translate-table' if necessary
@@ -191,7 +227,8 @@ and then modifies one entry in it."
          (> to   (length keyboard-translate-table)))
       (progn
        (let* ((i (length keyboard-translate-table))
-              (table (make-string (- 256 i) 0)))
+              (table (concat keyboard-translate-table
+                             (make-string (- 256 i) 0))))
          (while (< i 256)
            (aset table i i)
            (setq i (1+ i)))
@@ -327,7 +364,9 @@ as returned by the `event-start' and `event-end' functions."
 POSITION should be a list of the form
    (WINDOW BUFFER-POSITION (COL . ROW) TIMESTAMP)
 as returned by the `event-start' and `event-end' functions."
-  (nth 1 position))
+  (if (consp (nth 1 position))
+      (car (nth 1 position))
+    (nth 1 position)))
 
 (defsubst posn-col-row (position)
   "Return the row and column in POSITION.