compatibility with emacs22

Emacs22 lacks apply-partially and mouse-event-p, so define them if emacs
version is less than 23.  With this change, I was able to begin using
notmuch in emacs22.

The definitions of apply-partially and mouse-event-p are copied from
the emacs 23 distribution, (which is distributed under the GPLv3+ just
as notmuch).

diff --git a/emacs/notmuch-lib.el b/emacs/notmuch-lib.el
index 9d4e00f6958e5814f113d2f7b68bb3b9b6b540bb..dd180ee0d20a1a763a2a88f9ca559a38bbb637e0 100644 (file)
--- a/emacs/notmuch-lib.el
+++ b/emacs/notmuch-lib.el
@@ -116,5 +116,29 @@ within the current window."
       (or (memq prop buffer-invisibility-spec)
          (assq prop buffer-invisibility-spec)))))
 
+;; Compatibility functions for versions of emacs before emacs 23.
+;;
+;; Both functions here were copied from emacs 23 with the following copyright:
+;;
+;; Copyright (C) 1985, 1986, 1992, 1994, 1995, 1999, 2000, 2001, 2002, 2003,
+;;   2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+;;
+;; and under the GPL version 3 (or later) exactly as notmuch itself.
+(when (< emacs-major-version 23)
+  (defun apply-partially (fun &rest args)
+  "Return a function that is a partial application of FUN to ARGS.
+ARGS is a list of the first N arguments to pass to FUN.
+The result is a new function which does the same as FUN, except that
+the first N arguments are fixed at the values with which this function
+was called."
+  (lexical-let ((fun fun) (args1 args))
+    (lambda (&rest args2) (apply fun (append args1 args2)))))
+
+  (defun mouse-event-p (object)
+  "Return non-nil if OBJECT is a mouse click event."
+  (memq (event-basic-type object) '(mouse-1 mouse-2 mouse-3 mouse-movement))))
+
+
+
 (provide 'notmuch-lib)