;;; frame.el --- multi-frame management independent of window systems
;; Copyright (C) 1993, 1994, 1996, 1997, 2000, 2001, 2002, 2003,
-;; 2004, 2005 Free Software Foundation, Inc.
+;; 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
;; Maintainer: FSF
;; Keywords: internal
(defvar window-system-default-frame-alist nil
"Alist of window-system dependent default frame parameters.
-These may be set in your init file, like this:
+You can set this in your `.emacs' file; for example,
;; Disable menubar and toolbar on the console, but enable them under X.
(setq window-system-default-frame-alist
'((x (menu-bar-lines . 1) (tool-bar-lines . 1))
(nil (menu-bar-lines . 0) (tool-bar-lines . 0))))
-Also see `default-frame-alist'.")
+Parameters specified here supersede the values given in `default-frame-alist'.")
;; The initial value given here used to ask for a minibuffer.
;; But that's not necessary, because the default is to have one.
;; because that would override explicit user resizing.
(setq initial-frame-alist
(frame-remove-geometry-params initial-frame-alist))))
+ ;; Copy the environment of the Emacs process into the new frame.
+ (set-frame-parameter frame-initial-frame 'environment
+ (frame-parameter terminal-frame 'environment))
+ (set-frame-parameter frame-initial-frame 'term-environment-variable
+ (getenv "TERM"))
+ (set-frame-parameter frame-initial-frame 'display-environment-variable
+ (getenv "DISPLAY"))
;; At this point, we know that we have a frame open, so we
;; can delete the terminal frame.
(delete-frame terminal-frame)
;; parameter in default-frame-alist in a dumped Emacs, which is not
;; what we want.
(when (and (boundp 'tool-bar-mode)
- (not noninteractive))
+ (not noninteractive))
(let ((default (assq 'tool-bar-lines default-frame-alist)))
(if default
- (setq tool-bar-mode (not (eq (cdr default) 0)))
- (setq default-frame-alist
- (cons (cons 'tool-bar-lines (if tool-bar-mode 1 0))
- default-frame-alist)))))
+ (setq tool-bar-mode (not (eq (cdr default) 0)))
+ ;; If Emacs was started on a tty, changing default-frame-alist
+ ;; would disable the toolbar on X frames created later. We
+ ;; want to keep the default of showing a toolbar under X even
+ ;; in this case.
+ ;;
+ ;; If the user explicitly called `tool-bar-mode' in .emacs,
+ ;; then default-frame-alist is already changed anyway.
+ (when initial-window-system
+ (setq default-frame-alist
+ (cons (cons 'tool-bar-lines (if tool-bar-mode 1 0))
+ default-frame-alist))))))
;; Creating and deleting frames may shift the selected frame around,
;; and thus the current buffer. Protect against that. We don't
(defun modify-all-frames-parameters (alist)
"Modify all current and future frames' parameters according to ALIST.
This changes `default-frame-alist' and possibly `initial-frame-alist'.
+Furthermore, this function removes all parameters in ALIST from
+`window-system-default-frame-alist'.
See help of `modify-frame-parameters' for more information."
- (let (element) ;; temp
- (dolist (frame (frame-list))
- (modify-frame-parameters frame alist))
-
- (dolist (pair alist) ;; conses to add/replace
- ;; initial-frame-alist needs setting only when
- ;; frame-notice-user-settings is true
- (and frame-notice-user-settings
- (setq element (assoc (car pair) initial-frame-alist))
- (setq initial-frame-alist (delq element initial-frame-alist)))
- (and (setq element (assoc (car pair) default-frame-alist))
- (setq default-frame-alist (delq element default-frame-alist)))))
+ (dolist (frame (frame-list))
+ (modify-frame-parameters frame alist))
+
+ (dolist (pair alist) ;; conses to add/replace
+ ;; initial-frame-alist needs setting only when
+ ;; frame-notice-user-settings is true.
+ (and frame-notice-user-settings
+ (setq initial-frame-alist
+ (assq-delete-all (car pair) initial-frame-alist)))
+ (setq default-frame-alist
+ (assq-delete-all (car pair) default-frame-alist))
+ ;; Remove any similar settings from the window-system specific
+ ;; parameters---they would override default-frame-alist.
+ (dolist (w window-system-default-frame-alist)
+ (setcdr w (assq-delete-all (car pair) (cdr w)))))
+
(and frame-notice-user-settings
(setq initial-frame-alist (append initial-frame-alist alist)))
(setq default-frame-alist (append default-frame-alist alist)))
(x-initialize-window-system))
(make-frame `((window-system . x) (display . ,display) . ,parameters)))
-(defun make-frame-on-tty (device type &optional parameters)
- "Make a frame on terminal DEVICE which is of type TYPE (e.g., \"xterm\").
-The optional third argument PARAMETERS specifies additional frame parameters."
+(defun make-frame-on-tty (tty type &optional parameters)
+ "Make a frame on terminal device TTY.
+TTY should be the file name of the tty device to use. TYPE
+should be the terminal type string of TTY, for example \"xterm\"
+or \"vt100\". The optional third argument PARAMETERS specifies
+additional frame parameters."
(interactive "fOpen frame on tty device: \nsTerminal type of %s: ")
- (unless device
+ (unless tty
(error "Invalid terminal device"))
(unless type
(error "Invalid terminal type"))
- (make-frame `((window-system . nil) (tty . ,device) (tty-type . ,type) . ,parameters)))
+ (make-frame `((window-system . nil) (tty . ,tty) (tty-type . ,type) . ,parameters)))
(defun make-frame-command ()
"Make a new frame, and select it if the terminal displays only one frame."
(window-system . nil) The frame should be displayed on a terminal device.
(window-system . x) The frame should be displayed in an X window.
- (device . ID) The frame should use the display device identified by ID.
+ (terminal . ID) The frame should use the terminal identified by ID.
Before the frame is created (via `frame-creation-function-alist'), functions on the
hook `before-make-frame-hook' are run. After the frame is created, functions
setup is for focus to follow the pointer."
(interactive)
(let* ((w (cond
- ((assq 'device parameters)
- (let ((type (display-live-p (cdr (assq 'device parameters)))))
+ ((assq 'terminal parameters)
+ (let ((type (terminal-live-p (cdr (assq 'terminal parameters)))))
(cond
((eq type t) nil)
- ((eq type nil) (error "Display %s does not exist" (cdr (assq 'device parameters))))
+ ((eq type nil) (error "Terminal %s does not exist" (cdr (assq 'terminal parameters))))
(t type))))
((assq 'window-system parameters)
(cdr (assq 'window-system parameters)))
(t window-system)))
(frame-creation-function (cdr (assq w frame-creation-function-alist)))
+ (oldframe (selected-frame))
frame)
(unless frame-creation-function
(error "Don't know how to create a frame on window system %s" w))
(run-hooks 'before-make-frame-hook)
(setq frame (funcall frame-creation-function (append parameters (cdr (assq w window-system-default-frame-alist)))))
(normal-erase-is-backspace-setup-frame frame)
+ ;; Inherit the 'environment and 'client parameters.
+ (let ((env (frame-parameter oldframe 'environment))
+ (client (frame-parameter oldframe 'client))
+ (termenv (frame-parameter oldframe 'term-environment-variable))
+ (displayenv (frame-parameter oldframe 'display-environment-variable)))
+ (if (not (framep env))
+ (setq env oldframe))
+ (if (and env (not (assq 'environment parameters)))
+ (set-frame-parameter frame 'environment env))
+ (if (and termenv (not (assq 'term-environment-variable parameters)))
+ (set-frame-parameter frame 'term-environment-variable termenv))
+ (if (and displayenv (not (assq 'display-environment-variable parameters)))
+ (set-frame-parameter frame 'display-environment-variable displayenv))
+ (if (and client (not (assq 'client parameters)))
+ (set-frame-parameter frame 'client client)))
(run-hook-with-args 'after-make-frame-functions frame)
frame))
frame's terminal device."
(let* ((terminal (terminal-id terminal))
(func #'(lambda (frame)
- (eq (frame-display frame) terminal))))
+ (eq (frame-terminal frame) terminal))))
(filtered-frame-list func)))
-(defun framep-on-display (&optional display)
- "Return the type of frames on DISPLAY.
-DISPLAY may be a display id, a display name or a frame. If it is
-a frame, its type is returned.
-If DISPLAY is omitted or nil, it defaults to the selected frame's display.
-All frames on a given display are of the same type."
- (or (display-live-p display)
- (framep display)
- (framep (car (frames-on-display-list display)))))
+(defun framep-on-display (&optional terminal)
+ "Return the type of frames on TERMINAL.
+TERMINAL may be a terminal id, a display name or a frame. If it
+is a frame, its type is returned. If TERMINAL is omitted or nil,
+it defaults to the selected frame's terminal device. All frames
+on a given display are of the same type."
+ (or (terminal-live-p terminal)
+ (framep terminal)
+ (framep (car (frames-on-display-list terminal)))))
(defun frame-remove-geometry-params (param-list)
"Return the parameter list PARAM-LIST, but with geometry specs removed.
(nreverse frame-initial-geometry-arguments))
(cdr param-list))
-(defcustom focus-follows-mouse t
+(defcustom focus-follows-mouse (not (eq window-system 'mac))
"*Non-nil if window system changes focus when you move the mouse.
You should set this variable to tell Emacs how your window manager
handles focus, since there is no way in general for Emacs to find out
-automatically."
+automatically.
+
+This variable does not have any effect on MS-Windows."
:type 'boolean
:group 'frames
:version "20.3")
(select-frame frame)
(raise-frame frame)
;; Ensure, if possible, that frame gets input focus.
- (cond ((eq (window-system frame) 'x)
+ (cond ((memq (window-system frame) '(x max))
(x-focus-frame frame))
((eq (window-system frame) 'w32)
(w32-focus-frame frame)))
(set-mouse-position (selected-frame) (1- (frame-width)) 0))))
(defun other-frame (arg)
- "Select the ARG'th different visible frame on current display, and raise it.
+ "Select the ARGth different visible frame on current display, and raise it.
All frames are arranged in a cyclic order.
This command selects the frame ARG steps away in that order.
A negative ARG moves in the opposite order.
(defun suspend-frame ()
"Do whatever is right to suspend the current frame.
-Calls `suspend-emacs' if invoked from the controlling terminal,
-`suspend-tty' from a secondary terminal, and
+Calls `suspend-emacs' if invoked from the controlling tty device,
+`suspend-tty' from a secondary tty device, and
`iconify-or-deiconify-frame' from an X frame."
(interactive)
(let ((type (framep (selected-frame))))
(cond
((eq type 'x) (iconify-or-deiconify-frame))
((eq type t)
- (if (display-controlling-tty-p)
+ (if (controlling-tty-p)
(suspend-emacs)
(suspend-tty)))
(t (suspend-emacs)))))
-
(defun make-frame-names-alist ()
(let* ((current-frame (selected-frame))
(falist
(defun set-frame-parameter (frame parameter value)
"Set frame parameter PARAMETER to VALUE on FRAME.
If FRAME is nil, it defaults to the selected frame.
-See `modify-frame-parameters.'"
+See `modify-frame-parameters'."
(modify-frame-parameters frame (list (cons parameter value))))
(defun set-background-color (color-name)
"Set the background color of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current background color, use `frame-parameters'."
- (interactive (list (facemenu-read-color)))
+ (interactive (list (facemenu-read-color "Background color: ")))
(modify-frame-parameters (selected-frame)
(list (cons 'background-color color-name)))
(or window-system
"Set the foreground color of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current foreground color, use `frame-parameters'."
- (interactive (list (facemenu-read-color)))
+ (interactive (list (facemenu-read-color "Foreground color: ")))
(modify-frame-parameters (selected-frame)
(list (cons 'foreground-color color-name)))
(or window-system
"Set the text cursor color of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current cursor color, use `frame-parameters'."
- (interactive (list (facemenu-read-color)))
+ (interactive (list (facemenu-read-color "Cursor color: ")))
(modify-frame-parameters (selected-frame)
(list (cons 'cursor-color color-name))))
"Set the color of the mouse pointer of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current mouse color, use `frame-parameters'."
- (interactive (list (facemenu-read-color)))
+ (interactive (list (facemenu-read-color "Mouse color: ")))
(modify-frame-parameters (selected-frame)
(list (cons 'mouse-color
(or color-name
"Set the color of the border of the selected frame to COLOR-NAME.
When called interactively, prompt for the name of the color to use.
To get the frame's current border color, use `frame-parameters'."
- (interactive (list (facemenu-read-color)))
+ (interactive (list (facemenu-read-color "Border color: ")))
(modify-frame-parameters (selected-frame)
(list (cons 'border-color color-name))))
(cons vert hor)))
\f
;;;; Frame/display capabilities.
-(defun selected-display ()
- "Return the display that is now selected."
- (frame-display (selected-frame)))
+(defun selected-terminal ()
+ "Return the terminal that is now selected."
+ (frame-terminal (selected-frame)))
(defun display-mouse-p (&optional display)
"Return non-nil if DISPLAY has a mouse available.
(t
(frame-width (if (framep display) display (selected-frame)))))))
+(defcustom display-mm-dimensions-alist nil
+ "Alist for specifying screen dimensions in millimeters.
+The dimensions will be used for `display-mm-height' and
+`display-mm-width' if defined for the respective display.
+
+Each element of the alist has the form (display . (width . height)),
+e.g. (\":0.0\" . (287 . 215)).
+
+If `display' equals t, it specifies dimensions for all graphical
+displays not explicitely specified."
+ :version "22.1"
+ :type '(alist :key-type (choice (string :tag "Display name")
+ (const :tag "Default" t))
+ :value-type (cons :tag "Dimensions"
+ (integer :tag "Width")
+ (integer :tag "Height")))
+ :group 'frames)
+
(defun display-mm-height (&optional display)
"Return the height of DISPLAY's screen in millimeters.
+System values can be overriden by `display-mm-dimensions-alist'.
If the information is unavailable, value is nil."
(and (memq (framep-on-display display) '(x w32 mac))
- (x-display-mm-height display)))
+ (or (cddr (assoc (or display (frame-parameter nil 'display))
+ display-mm-dimensions-alist))
+ (cddr (assoc t display-mm-dimensions-alist))
+ (x-display-mm-height display))))
(defun display-mm-width (&optional display)
"Return the width of DISPLAY's screen in millimeters.
+System values can be overriden by `display-mm-dimensions-alist'.
If the information is unavailable, value is nil."
(and (memq (framep-on-display display) '(x w32 mac))
- (x-display-mm-width display)))
+ (or (cadr (assoc (or display (frame-parameter nil 'display))
+ display-mm-dimensions-alist))
+ (cadr (assoc t display-mm-dimensions-alist))
+ (x-display-mm-width display))))
(defun display-backing-store (&optional display)
"Return the backing store capability of DISPLAY's screen.
(defcustom show-trailing-whitespace nil
"*Non-nil means highlight trailing whitespace.
This is done in the face `trailing-whitespace'."
- :tag "Highlight trailing whitespace."
:type 'boolean
:group 'whitespace-faces)
(defcustom blink-cursor-delay 0.5
"*Seconds of idle time after which cursor starts to blink."
- :tag "Delay in seconds."
:type 'number
:group 'cursor)
(defcustom blink-cursor-interval 0.5
"*Length of cursor blink interval in seconds."
- :tag "Blink interval in seconds."
:type 'number
:group 'cursor)
This timer calls `blink-cursor-timer-function' every
`blink-cursor-interval' seconds.")
-(define-minor-mode blink-cursor-mode
- "Toggle blinking cursor mode.
-With a numeric argument, turn blinking cursor mode on iff ARG is positive.
-When blinking cursor mode is enabled, the cursor of the selected
-window blinks.
-
-Note that this command is effective only when Emacs
-displays through a window system, because then Emacs does its own
-cursor display. On a text-only terminal, this is not implemented."
- :init-value (not (or noninteractive
- no-blinking-cursor
- (eq system-type 'ms-dos)
- (not (memq initial-window-system '(x w32 mac)))))
- :initialize 'custom-initialize-safe-default
- :group 'cursor
- :global t
- (if blink-cursor-idle-timer (cancel-timer blink-cursor-idle-timer))
- (if blink-cursor-timer (cancel-timer blink-cursor-timer))
- (setq blink-cursor-idle-timer nil
- blink-cursor-timer nil)
- (if blink-cursor-mode
- (progn
- ;; Hide the cursor.
- ;;(internal-show-cursor nil nil)
- (setq blink-cursor-idle-timer
- (run-with-idle-timer blink-cursor-delay
- blink-cursor-delay
- 'blink-cursor-start)))
- (internal-show-cursor nil t)))
-
-(define-obsolete-variable-alias 'blink-cursor 'blink-cursor-mode "22.1")
-
(defun blink-cursor-start ()
"Timer function called from the timer `blink-cursor-idle-timer'.
This starts the timer `blink-cursor-timer', which makes the cursor blink
if appropriate. It also arranges to cancel that timer when the next
command starts, by installing a pre-command hook."
(when (null blink-cursor-timer)
- (add-hook 'pre-command-hook 'blink-cursor-end)
- (internal-show-cursor nil nil)
+ ;; Set up the timer first, so that if this signals an error,
+ ;; blink-cursor-end is not added to pre-command-hook.
(setq blink-cursor-timer
(run-with-timer blink-cursor-interval blink-cursor-interval
- 'blink-cursor-timer-function))))
+ 'blink-cursor-timer-function))
+ (add-hook 'pre-command-hook 'blink-cursor-end)
+ (internal-show-cursor nil nil)))
(defun blink-cursor-timer-function ()
"Timer function of timer `blink-cursor-timer'."
itself as a pre-command hook."
(remove-hook 'pre-command-hook 'blink-cursor-end)
(internal-show-cursor nil t)
- (cancel-timer blink-cursor-timer)
- (setq blink-cursor-timer nil))
+ (when blink-cursor-timer
+ (cancel-timer blink-cursor-timer)
+ (setq blink-cursor-timer nil)))
+(define-minor-mode blink-cursor-mode
+ "Toggle blinking cursor mode.
+With a numeric argument, turn blinking cursor mode on iff ARG is positive.
+When blinking cursor mode is enabled, the cursor of the selected
+window blinks.
+
+Note that this command is effective only when Emacs
+displays through a window system, because then Emacs does its own
+cursor display. On a text-only terminal, this is not implemented."
+ :init-value (not (or noninteractive
+ no-blinking-cursor
+ (eq system-type 'ms-dos)
+ (not (memq window-system '(x w32 mac)))))
+ :initialize 'custom-initialize-safe-default
+ :group 'cursor
+ :global t
+ (if blink-cursor-idle-timer (cancel-timer blink-cursor-idle-timer))
+ (setq blink-cursor-idle-timer nil)
+ (blink-cursor-end)
+ (when blink-cursor-mode
+ ;; Hide the cursor.
+ ;;(internal-show-cursor nil nil)
+ (setq blink-cursor-idle-timer
+ (run-with-idle-timer blink-cursor-delay
+ blink-cursor-delay
+ 'blink-cursor-start))))
+(define-obsolete-variable-alias 'blink-cursor 'blink-cursor-mode "22.1")
\f
;; Hourglass pointer
(defcustom display-hourglass t
- "*Non-nil means show an hourglass pointer when running under a window system."
- :tag "Hourglass pointer"
+ "*Non-nil means show an hourglass pointer, when Emacs is busy.
+This feature only works when on a window system that can change
+cursor shapes."
:type 'boolean
:group 'cursor)
(defcustom hourglass-delay 1
- "*Seconds to wait before displaying an hourglass pointer."
- :tag "Hourglass delay"
+ "*Seconds to wait before displaying an hourglass pointer when Emacs is busy."
:type 'number
:group 'cursor)
"*Non-nil means show a hollow box cursor in non-selected windows.
If nil, don't show a cursor except in the selected window.
Use Custom to set this variable to get the display updated."
- :tag "Cursor in non-selected windows"
+ :tag "Cursor In Non-selected Windows"
:type 'boolean
:group 'cursor
:set #'(lambda (symbol value)
(define-key ctl-x-5-map "0" 'delete-frame)
(define-key ctl-x-5-map "o" 'other-frame)
-(substitute-key-definition 'suspend-emacs 'suspend-frame global-map)
-
-
-(defun terminal-id (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 (display-live-p terminal)
- terminal
- (signal 'wrong-type-argument (list 'display-live-p terminal))))
- ((or (null terminal) (framep terminal))
- (frame-display 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-display f)))
- (t
- (error "Invalid argument %s in `terminal-id'" terminal))))
-
-(defvar terminal-parameter-alist nil
- "An alist of terminal parameter alists.")
-
-(defun terminal-parameters (&optional terminal)
- "Return the paramater-alist of terminal TERMINAL.
-It is a list of elements of the form (PARM . VALUE), where PARM is a symbol.
-
-TERMINAL can be a terminal id, a frame, or nil (meaning the
-selected frame's terminal)."
- (cdr (assq (terminal-id terminal) terminal-parameter-alist)))
-
-(defun terminal-parameter-p (terminal parameter)
- "Return non-nil if PARAMETER is a terminal parameter on TERMINAL.
-
-The actual value returned in that case is a cell (PARAMETER . VALUE),
-where VALUE is the current value of PARAMETER.
-
-TERMINAL can be a terminal id, a frame, or nil (meaning the
-selected frame's terminal)."
- (assq parameter (cdr (assq (terminal-id terminal) terminal-parameter-alist))))
-
-(defun terminal-parameter (terminal parameter)
- "Return TERMINAL's value for parameter PARAMETER.
-
-TERMINAL can be a terminal id, a frame, or nil (meaning the
-selected frame's terminal)."
- (cdr (terminal-parameter-p terminal parameter)))
-
-(defun set-terminal-parameter (terminal parameter value)
- "Set TERMINAL's value for parameter PARAMETER to VALUE.
-Returns the previous value of PARAMETER.
-
-TERMINAL can be a terminal id, a frame, or nil (meaning the
-selected frame's terminal)."
- (setq terminal (terminal-id terminal))
- (let* ((alist (assq terminal terminal-parameter-alist))
- (pair (assq parameter (cdr alist)))
- (result (cdr pair)))
- (cond
- (pair (setcdr pair value))
- (alist (setcdr alist (cons (cons parameter value) (cdr alist))))
- (t (setq terminal-parameter-alist
- (cons (cons terminal
- (cons (cons parameter value)
- nil))
- terminal-parameter-alist))))
- result))
-
-(defun terminal-handle-delete-frame (frame)
- "Clean up terminal parameters of FRAME, if it's the last frame on its terminal."
- ;; XXX We assume that the display is closed immediately after the
- ;; last frame is deleted on it. It would be better to create a hook
- ;; called `delete-display-functions', and use it instead.
- (when (and (frame-live-p frame)
- (= 1 (length (frames-on-display-list (frame-display frame)))))
- (setq terminal-parameter-alist
- (assq-delete-all (frame-display frame) terminal-parameter-alist))))
-
-(add-hook 'delete-frame-functions 'terminal-handle-delete-frame)
-
-(defun terminal-getenv (variable &optional terminal)
- "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 was created by an emacsclient invocation, then the
-variable is looked up in the environment of the emacsclient
-process; otherwise the function consults the environment of the
-Emacs process.
-
-TERMINAL can be a terminal id, a frame, or nil (meaning the
-selected frame's terminal)."
- (setq terminal (terminal-id terminal))
- (if (not (terminal-parameter-p terminal 'environment))
- (getenv variable)
- (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 (null result)
- (getenv variable)
- result))))
-
-(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 list of strings.
-
-TERMINAL can be a terminal id, a frame, or nil (meaning the
-selected frame's terminal).
-
-See also `terminal-getenv'."
- (declare (indent 2))
- (let ((oldvalues (make-symbol "oldvalues"))
- (var (make-symbol "var"))
- (value (make-symbol "value"))
- (pair (make-symbol "pair")))
- `(let (,oldvalues)
- (dolist (,var ,vars)
- (let ((,value (terminal-getenv ,var ,terminal)))
- (setq ,oldvalues (cons (cons ,var (getenv ,var)) ,oldvalues))
- (setenv ,var ,value)))
- (unwind-protect
- (progn ,@body)
- (dolist (,pair ,oldvalues)
- (setenv (car ,pair) (cdr ,pair)))))))
-
-
(provide 'frame)
;; arch-tag: 82979c70-b8f2-4306-b2ad-ddbd6b328b56