Fix exponential slowdowns on repeated tty frame creation.

* lisp/term/xterm.el: Protect extended function-key-map from being added
  to the real function-key-map each time the file is loaded.
  (xterm-function-map): New variable.

* lisp/term/rxvt.el: Ditto.
  (rxvt-function-map): New variable.

* lisp/term/lk201.el: Add note on buggy globalness of define-key.
* lisp/term/iris-ansi.el: Ditto.
* lisp/term/news.el: Ditto.
* lisp/term/sun.el: Ditto.


git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-337

5 files changed, 247 insertions, 222 deletions

diff --git a/lisp/term/iris-ansi.el b/lisp/term/iris-ansi.el
index e73c3e19968..05c7e9a5955 100644
--- a/lisp/term/iris-ansi.el
+++ b/lisp/term/iris-ansi.el
@@ -25,6 +25,8 @@
 
 ;;; Code:
 
+;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
+
 (define-key function-key-map "\e[120q" [S-escape])
 (define-key function-key-map "\e[121q" [C-escape])
 
diff --git a/lisp/term/news.el b/lisp/term/news.el
index a6f7481c422..1b251dae58e 100644
--- a/lisp/term/news.el
+++ b/lisp/term/news.el
@@ -35,6 +35,8 @@
   (if (not (keymapp news-fkey-prefix))
       (error "What?  Your news termcap/terminfo has no keycaps in it"))
 
+  ;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
+
   ;; Termcap or terminfo will set these
   ;; (define-key news-fkey-prefix "P" [f1])
   ;; (define-key news-fkey-prefix "Q" [f2])
diff --git a/lisp/term/rxvt.el b/lisp/term/rxvt.el
index 32f7900ed75..7b53f098e82 100644
--- a/lisp/term/rxvt.el
+++ b/lisp/term/rxvt.el
@@ -28,73 +28,83 @@
 
 (require 'server)
 
+(defvar rxvt-function-map (make-sparse-keymap)
+  "Function key rxvt-function-mapoverrides for rxvt.")
+
 ;; Set up function-key-map entries that termcap and terminfo don't know.
-(let ((map (make-sparse-keymap)))
-  (define-key map "\e[A" [up])
-  (define-key map "\e[B" [down])
-  (define-key map "\e[C" [right])
-  (define-key map "\e[D" [left])
-  (define-key map "\e[7~" [home])
-  (define-key map "\e[2~" [insert])
-  (define-key map "\e[3~" [delete])
-  (define-key map "\e[4~" [select])
-  (define-key map "\e[5~" [prior])
-  (define-key map "\e[6~" [next])
-  (define-key map "\e[11~" [f1])
-  (define-key map "\e[12~" [f2])
-  (define-key map "\e[13~" [f3])
-  (define-key map "\e[14~" [f4])
-  (define-key map "\e[15~" [f5])
-  (define-key map "\e[17~" [f6])
-  (define-key map "\e[18~" [f7])
-  (define-key map "\e[19~" [f8])
-  (define-key map "\e[20~" [f9])
-  (define-key map "\e[21~" [f10])
-  (define-key map "\e[23~" [f11])
-  (define-key map "\e[24~" [f12])
-  (define-key map "\e[29~" [print])
-
-  (define-key map "\e[11^" [C-f1])
-  (define-key map "\e[12^" [C-f2])
-  (define-key map "\e[13^" [C-f3])
-  (define-key map "\e[14^" [C-f4])
-  (define-key map "\e[15^" [C-f5])
-  (define-key map "\e[17^" [C-f6])
-  (define-key map "\e[18^" [C-f7])
-  (define-key map "\e[19^" [C-f8])
-  (define-key map "\e[20^" [C-f9])
-  (define-key map "\e[21^" [C-f10])
-  (define-key map "\e[23^" [C-f11])
-  (define-key map "\e[24^" [C-f12])
-
-  (define-key map "\e[29~" [print])
-
-  (define-key map "\e[2;2~" [S-insert])
-  (define-key map "\e[3$" [S-delete])
-
-  (define-key map "\e[2^" [C-insert])
-  (define-key map "\e[3^" [C-delete])
-  (define-key map "\e[5^" [C-prior])
-  (define-key map "\e[6^" [C-next])
-  (define-key map "\eOd" [C-left])
-  (define-key map "\eOc" [C-right])
-  (define-key map "\eOa" [C-up])
-  (define-key map "\eOb" [C-down])
-
-  (define-key map "\e[5$" [S-prior])
-  (define-key map "\e[6$" [S-next])
-  (define-key map "\e[8$" [S-end])
-  (define-key map "\e[7$" [S-home])
-  (define-key map "\e[d" [S-left])
-  (define-key map "\e[c" [S-right])
-  (define-key map "\e[a" [S-up])
-  (define-key map "\e[b" [S-down])
-
-  ;; Use inheritance to let the main keymap override those defaults.
-  ;; This way we don't override terminfo-derived settings or settings
-  ;; made in the .emacs file.
-  (set-keymap-parent map (keymap-parent function-key-map))
-  (set-keymap-parent function-key-map map))
+;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
+(define-key rxvt-function-map "\e[A" [up])
+(define-key rxvt-function-map "\e[B" [down])
+(define-key rxvt-function-map "\e[C" [right])
+(define-key rxvt-function-map "\e[D" [left])
+(define-key rxvt-function-map "\e[7~" [home])
+(define-key rxvt-function-map "\e[2~" [insert])
+(define-key rxvt-function-map "\e[3~" [delete])
+(define-key rxvt-function-map "\e[4~" [select])
+(define-key rxvt-function-map "\e[5~" [prior])
+(define-key rxvt-function-map "\e[6~" [next])
+(define-key rxvt-function-map "\e[11~" [f1])
+(define-key rxvt-function-map "\e[12~" [f2])
+(define-key rxvt-function-map "\e[13~" [f3])
+(define-key rxvt-function-map "\e[14~" [f4])
+(define-key rxvt-function-map "\e[15~" [f5])
+(define-key rxvt-function-map "\e[17~" [f6])
+(define-key rxvt-function-map "\e[18~" [f7])
+(define-key rxvt-function-map "\e[19~" [f8])
+(define-key rxvt-function-map "\e[20~" [f9])
+(define-key rxvt-function-map "\e[21~" [f10])
+(define-key rxvt-function-map "\e[23~" [f11])
+(define-key rxvt-function-map "\e[24~" [f12])
+(define-key rxvt-function-map "\e[29~" [print])
+
+(define-key rxvt-function-map "\e[11^" [C-f1])
+(define-key rxvt-function-map "\e[12^" [C-f2])
+(define-key rxvt-function-map "\e[13^" [C-f3])
+(define-key rxvt-function-map "\e[14^" [C-f4])
+(define-key rxvt-function-map "\e[15^" [C-f5])
+(define-key rxvt-function-map "\e[17^" [C-f6])
+(define-key rxvt-function-map "\e[18^" [C-f7])
+(define-key rxvt-function-map "\e[19^" [C-f8])
+(define-key rxvt-function-map "\e[20^" [C-f9])
+(define-key rxvt-function-map "\e[21^" [C-f10])
+(define-key rxvt-function-map "\e[23^" [C-f11])
+(define-key rxvt-function-map "\e[24^" [C-f12])
+
+(define-key rxvt-function-map "\e[29~" [print])
+
+(define-key rxvt-function-map "\e[2;2~" [S-insert])
+(define-key rxvt-function-map "\e[3$" [S-delete])
+
+(define-key rxvt-function-map "\e[2^" [C-insert])
+(define-key rxvt-function-map "\e[3^" [C-delete])
+(define-key rxvt-function-map "\e[5^" [C-prior])
+(define-key rxvt-function-map "\e[6^" [C-next])
+(define-key rxvt-function-map "\eOd" [C-left])
+(define-key rxvt-function-map "\eOc" [C-right])
+(define-key rxvt-function-map "\eOa" [C-up])
+(define-key rxvt-function-map "\eOb" [C-down])
+
+(define-key rxvt-function-map "\e[5$" [S-prior])
+(define-key rxvt-function-map "\e[6$" [S-next])
+(define-key rxvt-function-map "\e[8$" [S-end])
+(define-key rxvt-function-map "\e[7$" [S-home])
+(define-key rxvt-function-map "\e[d" [S-left])
+(define-key rxvt-function-map "\e[c" [S-right])
+(define-key rxvt-function-map "\e[a" [S-up])
+(define-key rxvt-function-map "\e[b" [S-down])
+
+;; Use inheritance to let the main keymap override those defaults.
+;; This way we don't override terminfo-derived settings or settings
+;; made in the .emacs file.
+(unless (let ((map (keymap-parent function-key-map))
+              found)
+          (while (and (not found) map)
+            (setq found (eq rxvt-function-map map)
+                  map (keymap-parent map)))
+          found)
+  (set-keymap-parent rxvt-function-map (keymap-parent function-key-map))
+  (set-keymap-parent function-key-map rxvt-function-map))
+
 
 ;; Set up colors, for those versions of rxvt that support it.
 (defvar rxvt-standard-colors
diff --git a/lisp/term/sun.el b/lisp/term/sun.el
index e0564d44ecb..2d4a71c1f5d 100644
--- a/lisp/term/sun.el
+++ b/lisp/term/sun.el
@@ -92,6 +92,8 @@
 ;; so we ignore them on the way down
 ;;
 
+;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
+
 (defvar sun-raw-prefix (make-sparse-keymap))
 (define-key function-key-map "\e[" sun-raw-prefix)
 
diff --git a/lisp/term/xterm.el b/lisp/term/xterm.el
index c30ee7ab34a..037f32191c3 100644
--- a/lisp/term/xterm.el
+++ b/lisp/term/xterm.el
@@ -28,162 +28,171 @@
 
 (require 'server)
 
-(let ((map (make-sparse-keymap)))
-  (define-key map "\e[A" [up])
-  (define-key map "\e[B" [down])
-  (define-key map "\e[C" [right])
-  (define-key map "\e[D" [left])
-  (define-key map "\e[1~" [home])
-  (define-key map "\e[2~" [insert])
-  (define-key map "\e[3~" [delete])
-  (define-key map "\e[4~" [select])
-  (define-key map "\e[5~" [prior])
-  (define-key map "\e[6~" [next])
-  (define-key map "\e[11~" [f1])
-  (define-key map "\e[12~" [f2])
-  (define-key map "\e[13~" [f3])
-  (define-key map "\e[14~" [f4])
-  (define-key map "\e[15~" [f5])
-  (define-key map "\e[17~" [f6])
-  (define-key map "\e[18~" [f7])
-  (define-key map "\e[19~" [f8])
-  (define-key map "\e[20~" [f9])
-  (define-key map "\e[21~" [f10])
-  (define-key map "\e[23~" [f11])
-  (define-key map "\e[24~" [f12])
-  (define-key map "\e[29~" [print])
-
-  (define-key map "\eOP" [f1])
-  (define-key map "\eOQ" [f2])
-  (define-key map "\eOR" [f3])
-  (define-key map "\eOS" [f4])
-
-  (define-key map "\eO2P" [S-f1])
-  (define-key map "\eO2Q" [S-f2])
-  (define-key map "\eO2R" [S-f3])
-  (define-key map "\eO2S" [S-f4])
-  (define-key map "\e[15;2~" [S-f5])
-  (define-key map "\e[17;2~" [S-f6])
-  (define-key map "\e[18;2~" [S-f7])
-  (define-key map "\e[19;2~" [S-f8])
-  (define-key map "\e[20;2~" [S-f9])
-  (define-key map "\e[21;2~" [S-f10])
-  (define-key map "\e[23;2~" [S-f11])
-  (define-key map "\e[24;2~" [S-f12])
-
-  (define-key map "\eO5P" [C-f1])
-  (define-key map "\eO5Q" [C-f2])
-  (define-key map "\eO5R" [C-f3])
-  (define-key map "\eO5S" [C-f4])
-  (define-key map "\e[15;5~" [C-f5])
-  (define-key map "\e[17;5~" [C-f6])
-  (define-key map "\e[18;5~" [C-f7])
-  (define-key map "\e[19;5~" [C-f8])
-  (define-key map "\e[20;5~" [C-f9])
-  (define-key map "\e[21;5~" [C-f10])
-  (define-key map "\e[23;5~" [C-f11])
-  (define-key map "\e[24;5~" [C-f12])
-
-  (define-key map "\eO6P" [C-S-f1])
-  (define-key map "\eO6Q" [C-S-f2])
-  (define-key map "\eO6R" [C-S-f3])
-  (define-key map "\eO6S" [C-S-f4])
-  (define-key map "\e[15;6~" [C-S-f5])
-  (define-key map "\e[17;6~" [C-S-f6])
-  (define-key map "\e[18;6~" [C-S-f7])
-  (define-key map "\e[19;6~" [C-S-f8])
-  (define-key map "\e[20;6~" [C-S-f9])
-  (define-key map "\e[21;6~" [C-S-f10])
-  (define-key map "\e[23;6~" [C-S-f11])
-  (define-key map "\e[24;6~" [C-S-f12])
-
-  (define-key map "\eO3P" [A-f1])
-  (define-key map "\eO3Q" [A-f2])
-  (define-key map "\eO3R" [A-f3])
-  (define-key map "\eO3S" [A-f4])
-  (define-key map "\e[15;3~" [A-f5])
-  (define-key map "\e[17;3~" [A-f6])
-  (define-key map "\e[18;3~" [A-f7])
-  (define-key map "\e[19;3~" [A-f8])
-  (define-key map "\e[20;3~" [A-f9])
-  (define-key map "\e[21;3~" [A-f10])
-  (define-key map "\e[23;3~" [A-f11])
-  (define-key map "\e[24;3~" [A-f12])
-
-  (define-key map "\e[1;2A" [S-up])
-  (define-key map "\e[1;2B" [S-down])
-  (define-key map "\e[1;2C" [S-right])
-  (define-key map "\e[1;2D" [S-left])
-  (define-key map "\e[1;2F" [S-end])
-  (define-key map "\e[1;2H" [S-home])
-
-  (define-key map "\e[1;5A" [C-up])
-  (define-key map "\e[1;5B" [C-down])
-  (define-key map "\e[1;5C" [C-right])
-  (define-key map "\e[1;5D" [C-left])
-  (define-key map "\e[1;5F" [C-end])
-  (define-key map "\e[1;5H" [C-home])
-
-  (define-key map "\e[1;6A" [C-S-up])
-  (define-key map "\e[1;6B" [C-S-down])
-  (define-key map "\e[1;6C" [C-S-right])
-  (define-key map "\e[1;6D" [C-S-left])
-  (define-key map "\e[1;6F" [C-S-end])
-  (define-key map "\e[1;6H" [C-S-home])
-
-  (define-key map "\e[1;3A" [A-up])
-  (define-key map "\e[1;3B" [A-down])
-  (define-key map "\e[1;3C" [A-right])
-  (define-key map "\e[1;3D" [A-left])
-  (define-key map "\e[1;3F" [A-end])
-  (define-key map "\e[1;3H" [A-home])
-
-  (define-key map "\e[2;2~" [S-insert])
-  (define-key map "\e[3;2~" [S-delete])
-  (define-key map "\e[5;2~" [S-prior])
-  (define-key map "\e[6;2~" [S-next])
-
-  (define-key map "\e[2;5~" [C-insert])
-  (define-key map "\e[3;5~" [C-delete])
-  (define-key map "\e[5;5~" [C-prior])
-  (define-key map "\e[6;5~" [C-next])
-
-  (define-key map "\e[2;6~" [C-S-insert])
-  (define-key map "\e[3;6~" [C-S-delete])
-  (define-key map "\e[5;6~" [C-S-prior])
-  (define-key map "\e[6;6~" [C-S-next])
-
-  (define-key map "\e[2;3~" [A-insert])
-  (define-key map "\e[3;3~" [A-delete])
-  (define-key map "\e[5;3~" [A-prior])
-  (define-key map "\e[6;3~" [A-next])
-
-  (define-key map "\eOA" [up])
-  (define-key map "\eOB" [down])
-  (define-key map "\eOC" [right])
-  (define-key map "\eOD" [left])
-  (define-key map "\eOF" [end])
-  (define-key map "\eOH" [home])
-
-  (define-key map "\eO2A" [S-up])
-  (define-key map "\eO2B" [S-down])
-  (define-key map "\eO2C" [S-right])
-  (define-key map "\eO2D" [S-left])
-  (define-key map "\eO2F" [S-end])
-  (define-key map "\eO2H" [S-home])
-
-  (define-key map "\eO5A" [C-up])
-  (define-key map "\eO5B" [C-down])
-  (define-key map "\eO5C" [C-right])
-  (define-key map "\eO5D" [C-left])
-  (define-key map "\eO5F" [C-end])
-  (define-key map "\eO5H" [C-home])
-
-  ;; Use inheritance to let the main keymap override those defaults.
-  ;; This way we don't override terminfo-derived settings or settings
-  ;; made in the .emacs file.
-  (set-keymap-parent map (keymap-parent function-key-map))
-  (set-keymap-parent function-key-map map))
+(defvar xterm-function-map (make-sparse-keymap)
+  "Function key map overrides for xterm.")
+
+;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
+(define-key xterm-function-map "\e[A" [up])
+(define-key xterm-function-map "\e[B" [down])
+(define-key xterm-function-map "\e[C" [right])
+(define-key xterm-function-map "\e[D" [left])
+(define-key xterm-function-map "\e[1~" [home])
+(define-key xterm-function-map "\e[2~" [insert])
+(define-key xterm-function-map "\e[3~" [delete])
+(define-key xterm-function-map "\e[4~" [select])
+(define-key xterm-function-map "\e[5~" [prior])
+(define-key xterm-function-map "\e[6~" [next])
+(define-key xterm-function-map "\e[11~" [f1])
+(define-key xterm-function-map "\e[12~" [f2])
+(define-key xterm-function-map "\e[13~" [f3])
+(define-key xterm-function-map "\e[14~" [f4])
+(define-key xterm-function-map "\e[15~" [f5])
+(define-key xterm-function-map "\e[17~" [f6])
+(define-key xterm-function-map "\e[18~" [f7])
+(define-key xterm-function-map "\e[19~" [f8])
+(define-key xterm-function-map "\e[20~" [f9])
+(define-key xterm-function-map "\e[21~" [f10])
+(define-key xterm-function-map "\e[23~" [f11])
+(define-key xterm-function-map "\e[24~" [f12])
+(define-key xterm-function-map "\e[29~" [print])
+
+(define-key xterm-function-map "\eOP" [f1])
+(define-key xterm-function-map "\eOQ" [f2])
+(define-key xterm-function-map "\eOR" [f3])
+(define-key xterm-function-map "\eOS" [f4])
+
+(define-key xterm-function-map "\eO2P" [S-f1])
+(define-key xterm-function-map "\eO2Q" [S-f2])
+(define-key xterm-function-map "\eO2R" [S-f3])
+(define-key xterm-function-map "\eO2S" [S-f4])
+(define-key xterm-function-map "\e[15;2~" [S-f5])
+(define-key xterm-function-map "\e[17;2~" [S-f6])
+(define-key xterm-function-map "\e[18;2~" [S-f7])
+(define-key xterm-function-map "\e[19;2~" [S-f8])
+(define-key xterm-function-map "\e[20;2~" [S-f9])
+(define-key xterm-function-map "\e[21;2~" [S-f10])
+(define-key xterm-function-map "\e[23;2~" [S-f11])
+(define-key xterm-function-map "\e[24;2~" [S-f12])
+
+(define-key xterm-function-map "\eO5P" [C-f1])
+(define-key xterm-function-map "\eO5Q" [C-f2])
+(define-key xterm-function-map "\eO5R" [C-f3])
+(define-key xterm-function-map "\eO5S" [C-f4])
+(define-key xterm-function-map "\e[15;5~" [C-f5])
+(define-key xterm-function-map "\e[17;5~" [C-f6])
+(define-key xterm-function-map "\e[18;5~" [C-f7])
+(define-key xterm-function-map "\e[19;5~" [C-f8])
+(define-key xterm-function-map "\e[20;5~" [C-f9])
+(define-key xterm-function-map "\e[21;5~" [C-f10])
+(define-key xterm-function-map "\e[23;5~" [C-f11])
+(define-key xterm-function-map "\e[24;5~" [C-f12])
+
+(define-key xterm-function-map "\eO6P" [C-S-f1])
+(define-key xterm-function-map "\eO6Q" [C-S-f2])
+(define-key xterm-function-map "\eO6R" [C-S-f3])
+(define-key xterm-function-map "\eO6S" [C-S-f4])
+(define-key xterm-function-map "\e[15;6~" [C-S-f5])
+(define-key xterm-function-map "\e[17;6~" [C-S-f6])
+(define-key xterm-function-map "\e[18;6~" [C-S-f7])
+(define-key xterm-function-map "\e[19;6~" [C-S-f8])
+(define-key xterm-function-map "\e[20;6~" [C-S-f9])
+(define-key xterm-function-map "\e[21;6~" [C-S-f10])
+(define-key xterm-function-map "\e[23;6~" [C-S-f11])
+(define-key xterm-function-map "\e[24;6~" [C-S-f12])
+
+(define-key xterm-function-map "\eO3P" [A-f1])
+(define-key xterm-function-map "\eO3Q" [A-f2])
+(define-key xterm-function-map "\eO3R" [A-f3])
+(define-key xterm-function-map "\eO3S" [A-f4])
+(define-key xterm-function-map "\e[15;3~" [A-f5])
+(define-key xterm-function-map "\e[17;3~" [A-f6])
+(define-key xterm-function-map "\e[18;3~" [A-f7])
+(define-key xterm-function-map "\e[19;3~" [A-f8])
+(define-key xterm-function-map "\e[20;3~" [A-f9])
+(define-key xterm-function-map "\e[21;3~" [A-f10])
+(define-key xterm-function-map "\e[23;3~" [A-f11])
+(define-key xterm-function-map "\e[24;3~" [A-f12])
+
+(define-key xterm-function-map "\e[1;2A" [S-up])
+(define-key xterm-function-map "\e[1;2B" [S-down])
+(define-key xterm-function-map "\e[1;2C" [S-right])
+(define-key xterm-function-map "\e[1;2D" [S-left])
+(define-key xterm-function-map "\e[1;2F" [S-end])
+(define-key xterm-function-map "\e[1;2H" [S-home])
+
+(define-key xterm-function-map "\e[1;5A" [C-up])
+(define-key xterm-function-map "\e[1;5B" [C-down])
+(define-key xterm-function-map "\e[1;5C" [C-right])
+(define-key xterm-function-map "\e[1;5D" [C-left])
+(define-key xterm-function-map "\e[1;5F" [C-end])
+(define-key xterm-function-map "\e[1;5H" [C-home])
+
+(define-key xterm-function-map "\e[1;6A" [C-S-up])
+(define-key xterm-function-map "\e[1;6B" [C-S-down])
+(define-key xterm-function-map "\e[1;6C" [C-S-right])
+(define-key xterm-function-map "\e[1;6D" [C-S-left])
+(define-key xterm-function-map "\e[1;6F" [C-S-end])
+(define-key xterm-function-map "\e[1;6H" [C-S-home])
+
+(define-key xterm-function-map "\e[1;3A" [A-up])
+(define-key xterm-function-map "\e[1;3B" [A-down])
+(define-key xterm-function-map "\e[1;3C" [A-right])
+(define-key xterm-function-map "\e[1;3D" [A-left])
+(define-key xterm-function-map "\e[1;3F" [A-end])
+(define-key xterm-function-map "\e[1;3H" [A-home])
+
+(define-key xterm-function-map "\e[2;2~" [S-insert])
+(define-key xterm-function-map "\e[3;2~" [S-delete])
+(define-key xterm-function-map "\e[5;2~" [S-prior])
+(define-key xterm-function-map "\e[6;2~" [S-next])
+
+(define-key xterm-function-map "\e[2;5~" [C-insert])
+(define-key xterm-function-map "\e[3;5~" [C-delete])
+(define-key xterm-function-map "\e[5;5~" [C-prior])
+(define-key xterm-function-map "\e[6;5~" [C-next])
+
+(define-key xterm-function-map "\e[2;6~" [C-S-insert])
+(define-key xterm-function-map "\e[3;6~" [C-S-delete])
+(define-key xterm-function-map "\e[5;6~" [C-S-prior])
+(define-key xterm-function-map "\e[6;6~" [C-S-next])
+
+(define-key xterm-function-map "\e[2;3~" [A-insert])
+(define-key xterm-function-map "\e[3;3~" [A-delete])
+(define-key xterm-function-map "\e[5;3~" [A-prior])
+(define-key xterm-function-map "\e[6;3~" [A-next])
+
+(define-key xterm-function-map "\eOA" [up])
+(define-key xterm-function-map "\eOB" [down])
+(define-key xterm-function-map "\eOC" [right])
+(define-key xterm-function-map "\eOD" [left])
+(define-key xterm-function-map "\eOF" [end])
+(define-key xterm-function-map "\eOH" [home])
+
+(define-key xterm-function-map "\eO2A" [S-up])
+(define-key xterm-function-map "\eO2B" [S-down])
+(define-key xterm-function-map "\eO2C" [S-right])
+(define-key xterm-function-map "\eO2D" [S-left])
+(define-key xterm-function-map "\eO2F" [S-end])
+(define-key xterm-function-map "\eO2H" [S-home])
+
+(define-key xterm-function-map "\eO5A" [C-up])
+(define-key xterm-function-map "\eO5B" [C-down])
+(define-key xterm-function-map "\eO5C" [C-right])
+(define-key xterm-function-map "\eO5D" [C-left])
+(define-key xterm-function-map "\eO5F" [C-end])
+(define-key xterm-function-map "\eO5H" [C-home])
+
+;; Use inheritance to let the main keymap override those defaults.
+;; This way we don't override terminfo-derived settings or settings
+;; made in the .emacs file.
+(unless (let ((map (keymap-parent function-key-map))
+              found)
+          (while (and (not found) map)
+            (setq found (eq xterm-function-map map)
+                  map (keymap-parent map)))
+          found)
+  (set-keymap-parent xterm-function-map (keymap-parent function-key-map))
+  (set-keymap-parent function-key-map xterm-function-map))
 
 ;;; The terminal intialization C code file might have initialized
 ;;; function keys F13->F60 from the termcap/terminfo information.  On