Speed up `emacsclient -t' on xterms. (by suggestion of Dan Nicolaescu)

* lisp/term/xterm.el: Speed up load time by protecting
  `substitute-key-definition' and `define-key' calls against multiple
  execution.

* lisp/term/rxvt.el: Ditto.
* lisp/term/lk201.el: Ditto.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-345

1 files changed, 76 insertions, 63 deletions

diff --git a/lisp/term/lk201.el b/lisp/term/lk201.el
index b207e13b0a5..e09b176ba8f 100644
--- a/lisp/term/lk201.el
+++ b/lisp/term/lk201.el
@@ -1,74 +1,87 @@
 ;; -*- no-byte-compile: t -*-
 ;; Define function key sequences for DEC terminals.
 
-;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
+(defvar lk201-function-map nil
+  "Function key definitions for lk201.")
 
-;; Termcap or terminfo should set these.
-;; (define-key function-key-map "\e[A" [up])
-;; (define-key function-key-map "\e[B" [down])
-;; (define-key function-key-map "\e[C" [right])
-;; (define-key function-key-map "\e[D" [left])
+;; Protect against reloads.
+(unless lk201-function-map
+  (setq lk201-function-map (make-sparse-keymap))
 
-(define-key function-key-map "\e[1~" [find])
-(define-key function-key-map "\e[2~" [insert])
-(define-key function-key-map "\e[3~" [delete])
-(define-key function-key-map "\e[4~" [select])
-(define-key function-key-map "\e[5~" [prior])
-(define-key function-key-map "\e[6~" [next])
-(define-key function-key-map "\e[11~" [f1])
-(define-key function-key-map "\e[12~" [f2])
-(define-key function-key-map "\e[13~" [f3])
-(define-key function-key-map "\e[14~" [f4])
-(define-key function-key-map "\e[15~" [f5])
-(define-key function-key-map "\e[17~" [f6])
-(define-key function-key-map "\e[18~" [f7])
-(define-key function-key-map "\e[19~" [f8])
-(define-key function-key-map "\e[20~" [f9])
-(define-key function-key-map "\e[21~" [f10])
-;; Customarily F11 is used as the ESC key.
-;; The file that includes this one, takes care of that.
-(define-key function-key-map "\e[23~" [f11])
-(define-key function-key-map "\e[24~" [f12])
-(define-key function-key-map "\e[25~" [f13])
-(define-key function-key-map "\e[26~" [f14])
-(define-key function-key-map "\e[28~" [help])
-(define-key function-key-map "\e[29~" [menu])
-(define-key function-key-map "\e[31~" [f17])
-(define-key function-key-map "\e[32~" [f18])
-(define-key function-key-map "\e[33~" [f19])
-(define-key function-key-map "\e[34~" [f20])
+  ;; XXX We need to find a way to have these define-keys be display-local. -- Lorentey
 
-;; Termcap or terminfo should set these.
-;; (define-key function-key-map "\eOA" [up])
-;; (define-key function-key-map "\eOB" [down])
-;; (define-key function-key-map "\eOC" [right])
-;; (define-key function-key-map "\eOD" [left])
+  ;; Termcap or terminfo should set these.
+  ;; (define-key function-key-map "\e[A" [up])
+  ;; (define-key function-key-map "\e[B" [down])
+  ;; (define-key function-key-map "\e[C" [right])
+  ;; (define-key function-key-map "\e[D" [left])
 
-;; Termcap or terminfo should set these, but doesn't properly.
-;; Termcap sets these to k1-k4, which get mapped to f1-f4 in term.c
-(define-key function-key-map "\eOP" [kp-f1])
-(define-key function-key-map "\eOQ" [kp-f2])
-(define-key function-key-map "\eOR" [kp-f3])
-(define-key function-key-map "\eOS" [kp-f4])
+  (define-key function-key-map "\e[1~" [find])
+  (define-key function-key-map "\e[2~" [insert])
+  (define-key function-key-map "\e[3~" [delete])
+  (define-key function-key-map "\e[4~" [select])
+  (define-key function-key-map "\e[5~" [prior])
+  (define-key function-key-map "\e[6~" [next])
+  (define-key function-key-map "\e[11~" [f1])
+  (define-key function-key-map "\e[12~" [f2])
+  (define-key function-key-map "\e[13~" [f3])
+  (define-key function-key-map "\e[14~" [f4])
+  (define-key function-key-map "\e[15~" [f5])
+  (define-key function-key-map "\e[17~" [f6])
+  (define-key function-key-map "\e[18~" [f7])
+  (define-key function-key-map "\e[19~" [f8])
+  (define-key function-key-map "\e[20~" [f9])
+  (define-key function-key-map "\e[21~" [f10])
+  ;; Customarily F11 is used as the ESC key.
+  ;; The file that includes this one, takes care of that.
+  (define-key function-key-map "\e[23~" [f11])
+  (define-key function-key-map "\e[24~" [f12])
+  (define-key function-key-map "\e[25~" [f13])
+  (define-key function-key-map "\e[26~" [f14])
+  (define-key function-key-map "\e[28~" [help])
+  (define-key function-key-map "\e[29~" [menu])
+  (define-key function-key-map "\e[31~" [f17])
+  (define-key function-key-map "\e[32~" [f18])
+  (define-key function-key-map "\e[33~" [f19])
+  (define-key function-key-map "\e[34~" [f20])
 
-(define-key function-key-map "\eOI" [kp-tab])
-(define-key function-key-map "\eOj" [kp-multiply])
-(define-key function-key-map "\eOk" [kp-add])
-(define-key function-key-map "\eOl" [kp-separator])
-(define-key function-key-map "\eOM" [kp-enter])
-(define-key function-key-map "\eOm" [kp-subtract])
-(define-key function-key-map "\eOn" [kp-decimal])
-(define-key function-key-map "\eOo" [kp-divide])
-(define-key function-key-map "\eOp" [kp-0])
-(define-key function-key-map "\eOq" [kp-1])
-(define-key function-key-map "\eOr" [kp-2])
-(define-key function-key-map "\eOs" [kp-3])
-(define-key function-key-map "\eOt" [kp-4])
-(define-key function-key-map "\eOu" [kp-5])
-(define-key function-key-map "\eOv" [kp-6])
-(define-key function-key-map "\eOw" [kp-7])
-(define-key function-key-map "\eOx" [kp-8])
-(define-key function-key-map "\eOy" [kp-9])
+  ;; Termcap or terminfo should set these.
+  ;; (define-key function-key-map "\eOA" [up])
+  ;; (define-key function-key-map "\eOB" [down])
+  ;; (define-key function-key-map "\eOC" [right])
+  ;; (define-key function-key-map "\eOD" [left])
+
+  ;; Termcap or terminfo should set these, but doesn't properly.
+  ;; Termcap sets these to k1-k4, which get mapped to f1-f4 in term.c
+  (define-key function-key-map "\eOP" [kp-f1])
+  (define-key function-key-map "\eOQ" [kp-f2])
+  (define-key function-key-map "\eOR" [kp-f3])
+  (define-key function-key-map "\eOS" [kp-f4])
+
+  (define-key function-key-map "\eOI" [kp-tab])
+  (define-key function-key-map "\eOj" [kp-multiply])
+  (define-key function-key-map "\eOk" [kp-add])
+  (define-key function-key-map "\eOl" [kp-separator])
+  (define-key function-key-map "\eOM" [kp-enter])
+  (define-key function-key-map "\eOm" [kp-subtract])
+  (define-key function-key-map "\eOn" [kp-decimal])
+  (define-key function-key-map "\eOo" [kp-divide])
+  (define-key function-key-map "\eOp" [kp-0])
+  (define-key function-key-map "\eOq" [kp-1])
+  (define-key function-key-map "\eOr" [kp-2])
+  (define-key function-key-map "\eOs" [kp-3])
+  (define-key function-key-map "\eOt" [kp-4])
+  (define-key function-key-map "\eOu" [kp-5])
+  (define-key function-key-map "\eOv" [kp-6])
+  (define-key function-key-map "\eOw" [kp-7])
+  (define-key function-key-map "\eOx" [kp-8])
+  (define-key function-key-map "\eOy" [kp-9])
+
+  ;; Use inheritance to let the main keymap override these defaults.
+  ;; This way we don't override terminfo-derived settings or settings
+  ;; made in the .emacs file.
+  (set-keymap-parent lk201-function-map (keymap-parent function-key-map))
+  (set-keymap-parent function-key-map lk201-function-map))
 
 ;;; arch-tag: 7ffb4444-6a23-43e1-b457-43cf4f673c0d
 ;;; lk201.el ends here