diff options
Diffstat (limited to 'lisp/termdev.el')
| -rw-r--r-- | lisp/termdev.el | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/lisp/termdev.el b/lisp/termdev.el new file mode 100644 index 00000000000..c73fe017046 --- /dev/null +++ b/lisp/termdev.el @@ -0,0 +1,195 @@ +;;; termdev.el --- functions for dealing with terminals + +;; Copyright (C) 2005 Free Software Foundation, Inc. + +;; Author: Karoly Lorentey <karoly@lorentey.hu> +;; Created: 2005-12-22 +;; Keywords: internal + +;; This file is part of GNU Emacs. + +;; GNU Emacs is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2, or (at your option) +;; any later version. + +;; GNU Emacs is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. + +;; You should have received a copy of the GNU General Public License +;; along with GNU Emacs; see the file COPYING. If not, write to the +;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, +;; Boston, MA 02110-1301, USA. + +(substitute-key-definition 'suspend-emacs 'suspend-frame global-map) + +(defun terminal-id (&optional terminal) + "Return the numerical id of terminal TERMINAL. + +TERMINAL can be a terminal id (an integer), a frame, or +nil (meaning the selected frame's terminal). Alternatively, +TERMINAL may be the name of an X display +device (HOST.SERVER.SCREEN) or a tty device file." + (cond + ((integerp terminal) + (if (terminal-live-p terminal) + terminal + (signal 'wrong-type-argument (list 'terminal-live-p terminal)))) + ((or (null terminal) (framep terminal)) + (frame-terminal terminal)) + ((stringp terminal) + (let ((f (car (filtered-frame-list (lambda (frame) + (or (equal (frame-parameter frame 'display) terminal) + (equal (frame-parameter frame 'tty) terminal))))))) + (or f (error "Display %s does not exist" terminal)) + (frame-terminal f))) + (t + (error "Invalid argument %s in `terminal-id'" terminal)))) + +;; (defun terminal-getenv (variable &optional terminal global-ok) +;; "Get the value of VARIABLE in the client environment of TERMINAL. +;; VARIABLE should be a string. Value is nil if VARIABLE is undefined in +;; the environment. Otherwise, value is a string. + +;; If TERMINAL has an associated emacsclient process, then +;; `terminal-getenv' looks up VARIABLE in the environment of that +;; process; otherwise the function consults the global environment, +;; i.e., the environment of the Emacs process itself. + +;; If GLOBAL-OK is non-nil, and VARIABLE is not defined in the +;; terminal-local environment, then `terminal-getenv' will return +;; its value in the global environment instead. + +;; TERMINAL can be a terminal id, a frame, or nil (meaning the +;; selected frame's terminal)." +;; (setq terminal (terminal-id terminal)) +;; (if (null (terminal-parameter terminal 'environment)) +;; (getenv variable) +;; (if (multibyte-string-p variable) +;; (setq variable (encode-coding-string variable locale-coding-system))) +;; (let ((env (terminal-parameter terminal 'environment)) +;; result entry) +;; (while (and env (null result)) +;; (setq entry (car env) +;; env (cdr env)) +;; (if (and (> (length entry) (length variable)) +;; (eq ?= (aref entry (length variable))) +;; (equal variable (substring entry 0 (length variable)))) +;; (setq result (substring entry (+ (length variable) 1))))) +;; (if (and global-ok (null result)) +;; (getenv variable) +;; (and result (decode-coding-string result locale-coding-system)))))) + +;; (defun terminal-setenv (variable &optional value terminal) +;; "Set the value of VARIABLE in the environment of TERMINAL. +;; VARIABLE should be string. VALUE is optional; if not provided or +;; nil, the environment variable VARIABLE is removed. Returned +;; value is the new value of VARIABLE, or nil if it was removed from +;; the environment. + +;; If TERMINAL was created by an emacsclient invocation, then the +;; variable is set in the environment of the emacsclient process; +;; otherwise the function changes the environment of the Emacs +;; process itself. + +;; TERMINAL can be a terminal id, a frame, or nil (meaning the +;; selected frame's terminal)." +;; (if (null (terminal-parameter terminal 'environment)) +;; (setenv variable value) +;; (with-terminal-environment terminal variable +;; (setenv variable value)))) + +;; (defun terminal-setenv-internal (variable value terminal) +;; "Set the value of VARIABLE in the environment of TERMINAL. +;; The caller is responsible to ensure that both VARIABLE and VALUE +;; are usable in environment variables and that TERMINAL is a +;; remote terminal." +;; (if (multibyte-string-p variable) +;; (setq variable (encode-coding-string variable locale-coding-system))) +;; (if (and value (multibyte-string-p value)) +;; (setq value (encode-coding-string value locale-coding-system))) +;; (let ((env (terminal-parameter terminal 'environment)) +;; found) +;; (while (and env (not found)) +;; (if (and (> (length (car env)) (length variable)) +;; (eq ?= (aref (car env) (length variable))) +;; (equal variable (substring (car env) 0 (length variable)))) +;; (progn +;; (if value +;; (setcar env (concat variable "=" value)) +;; (set-terminal-parameter terminal 'environment +;; (delq (car env) +;; (terminal-parameter terminal +;; 'environment)))) +;; (setq found t)) +;; (setq env (cdr env)))) +;; (cond +;; ((and value found) +;; (setcar env (concat variable "=" value))) +;; ((and value (not found)) +;; (set-terminal-parameter terminal 'environment +;; (cons (concat variable "=" value) +;; (terminal-parameter terminal +;; 'environment)))) +;; ((and (not value) found) +;; (set-terminal-parameter terminal 'environment +;; (delq (car env) +;; (terminal-parameter terminal +;; 'environment))))))) + +;; (defmacro with-terminal-environment (terminal vars &rest body) +;; "Evaluate BODY with environment variables VARS set to those of TERMINAL. +;; The environment variables are then restored to their previous values. + +;; VARS should be a single string, a list of strings, or t for all +;; environment variables. + +;; TERMINAL can be a terminal id, a frame, or nil (meaning the +;; selected frame's terminal). + +;; If BODY uses `setenv' to change environment variables in VARS, +;; then the new variable values will be remembered for TERMINAL, and +;; `terminal-getenv' will return them even outside BODY." +;; (declare (indent 2)) +;; (let ((var (make-symbol "var")) +;; (term (make-symbol "term")) +;; (v (make-symbol "v")) +;; (old-env (make-symbol "old-env"))) +;; `(let ((,term ,terminal) ; Evaluate arguments only once. +;; (,v ,vars)) +;; (if (stringp ,v) +;; (setq ,v (list ,v))) +;; (cond +;; ((null (terminal-parameter ,term 'environment)) +;; ;; Not a remote terminal; nothing to do. +;; (progn ,@body)) +;; ((eq ,v t) +;; ;; Switch the entire process-environment. +;; (let (,old-env process-environment) +;; (setq process-environment (terminal-parameter ,term 'environment)) +;; (unwind-protect +;; (progn ,@body) +;; (set-terminal-parameter ,term 'environment process-environment) +;; (setq process-environment ,old-env)))) +;; (t +;; ;; Do only a set of variables. +;; (let (,old-env) +;; (dolist (,var ,v) +;; (setq ,old-env (cons (cons ,var (getenv ,var)) ,old-env)) +;; (setenv ,var (terminal-getenv ,var ,term))) +;; (unwind-protect +;; (progn ,@body) +;; ;; Split storing new values and restoring old ones so +;; ;; that we DTRT even if a variable is specified twice in +;; ;; VARS. +;; (dolist (,var ,v) +;; (terminal-setenv-internal ,var (getenv ,var) ,term)) +;; (dolist (,var ,old-env) +;; (setenv (car ,var) (cdr ,var)))))))))) + +(provide 'termdev) + +;;; arch-tag: 4c4df277-1ec1-4f56-bfde-7f156fe62fb2 +;;; termdev.el ends here |