(toggle-input-method-active): New var.

(toggle-input-method): Bind toggle-input-method-active to t.
Error if it was already non-nil.

2 files changed, 13 insertions, 1 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 3576d72bf1a..e94db35386c 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,9 @@
+2007-11-29  Richard Stallman  <rms@gnu.org>
+
+        * international/mule-cmds.el (toggle-input-method-active): New var.
+        (toggle-input-method): Bind toggle-input-method-active to t.
+        Error if it was already non-nil.
+
 2007-11-29  Glenn Morris  <rgm@gnu.org>
 
         * calendar/time-date.el (with-decoded-time-value): Doc fix.
diff --git a/lisp/international/mule-cmds.el b/lisp/international/mule-cmds.el
index 6dd1bf07213..19663f594b9 100644
--- a/lisp/international/mule-cmds.el
+++ b/lisp/international/mule-cmds.el
@@ -1492,6 +1492,9 @@ To deactivate it programmatically, use `inactivate-input-method'."
     (customize-mark-as-set 'default-input-method))
   default-input-method)
 
+(defvar toggle-input-method-active nil
+  "Non-nil inside `toggle-input-method'.")
+
 (defun toggle-input-method (&optional arg interactive)
   "Enable or disable multilingual text input method for the current buffer.
 Only one input method can be enabled at any time in a given buffer.
@@ -1511,9 +1514,12 @@ When called interactively, the optional arg INTERACTIVE is non-nil,
 which marks the variable `default-input-method' as set for Custom buffers."
 
   (interactive "P\np")
+  (if toggle-input-method-active
+      (error "Recursive use of `toggle-input-method'"))
   (if (and current-input-method (not arg))
       (inactivate-input-method)
-    (let ((default (or (car input-method-history) default-input-method)))
+    (let ((toggle-input-method-active t)
+          (default (or (car input-method-history) default-input-method)))
       (if (and arg default (equal current-input-method default)
                (> (length input-method-history) 1))
           (setq default (nth 1 input-method-history)))