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emacs
emacs
Commits
be9b65ac
Commit
be9b65ac
authored
Nov 05, 1990
by
David Lawrence
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0b7da9ad
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lisp/comint.el
lisp/comint.el
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lisp/shell.el
lisp/shell.el
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lisp/subr.el
lisp/subr.el
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;; -*-Emacs-Lisp-*- run a shell in an Emacs window
;; Copyright (C) 1985, 1986, 1987, 1990 Free Software Foundation, Inc.
;; 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.
;;; Hacked from tea.el and shell.el by Olin Shivers (shivers@cs.cmu.edu). 8/88
;;; Since this mode is built on top of the general command-interpreter-in-
;;; a-buffer mode (comint mode), it shares a common base functionality,
;;; and a common set of bindings, with all modes derived from comint mode.
;;; For documentation on the functionality provided by comint mode, and
;;; the hooks available for customising it, see the file comint.el.
;;; Needs fixin:
;;; When sending text from a source file to a subprocess, the process-mark can
;;; move off the window, so you can lose sight of the process interactions.
;;; Maybe I should ensure the process mark is in the window when I send
;;; text to the process? Switch selectable?
(
require
'comint
)
(
provide
'shell
)
(
defvar
shell-popd-regexp
"popd"
"*Regexp to match subshell commands equivalent to popd."
)
(
defvar
shell-pushd-regexp
"pushd"
"*Regexp to match subshell commands equivalent to pushd."
)
(
defvar
shell-cd-regexp
"cd"
"*Regexp to match subshell commands equivalent to cd."
)
(
defvar
explicit-shell-file-name
nil
"*If non-nil, is file name to use for explicitly requested inferior shell."
)
(
defvar
explicit-csh-args
(
if
(
eq
system-type
'hpux
)
;; -T persuades HP's csh not to think it is smarter
;; than us about what terminal modes to use.
'
(
"-i"
"-T"
)
'
(
"-i"
))
"*Args passed to inferior shell by M-x shell, if the shell is csh.
Value is a list of strings, which may be nil."
)
(
defvar
shell-dirstack
nil
"List of directories saved by pushd in this buffer's shell."
)
(
defvar
shell-dirstack-query
"dirs"
"Command used by shell-resync-dirlist to query shell."
)
(
defvar
shell-mode-map
())
(
cond
((
not
shell-mode-map
)
(
setq
shell-mode-map
(
copy-keymap
comint-mode-map
))
(
define-key
shell-mode-map
"\t"
'comint-dynamic-complete
)
(
define-key
shell-mode-map
"\M-?"
'comint-dynamic-list-completions
)))
(
defvar
shell-mode-hook
'
()
"*Hook for customising shell mode"
)
;;; Basic Procedures
;;; ===========================================================================
;;;
(
defun
shell-mode
()
"Major mode for interacting with an inferior shell.
Return after the end of the process' output sends the text from the
end of process to the end of the current line.
Return before end of process output copies rest of line to end (skipping
the prompt) and sends it.
M-x send-invisible reads a line of text without echoing it, and sends it to
the shell.
If you accidentally suspend your process, use \\[comint-continue-subjob]
to continue it.
cd, pushd and popd commands given to the shell are watched by Emacs to keep
this buffer's default directory the same as the shell's working directory.
M-x dirs queries the shell and resyncs Emacs' idea of what the current
directory stack is.
M-x dirtrack-toggle turns directory tracking on and off.
\\{shell-mode-map}
Customisation: Entry to this mode runs the hooks on comint-mode-hook and
shell-mode-hook (in that order).
Variables shell-cd-regexp, shell-pushd-regexp and shell-popd-regexp are used
to match their respective commands."
(
interactive
)
(
comint-mode
)
(
setq
major-mode
'shell-mode
mode-name
"Shell"
comint-prompt-regexp
shell-prompt-pattern
comint-input-sentinel
'shell-directory-tracker
)
(
use-local-map
shell-mode-map
)
(
make-local-variable
'shell-dirstack
)
(
set
(
make-local-variable
'shell-dirtrackp
)
t
)
(
run-hooks
'shell-mode-hook
))
(
defun
shell
()
"Run an inferior shell, with I/O through buffer *shell*.
If buffer exists but shell process is not running, make new shell.
If buffer exists and shell process is running, just switch to buffer *shell*.
The shell to use comes from the first non-nil variable found from these:
explicit-shell-file-name in Emacs, ESHELL in the environment or SHELL in the
environment. If none is found, /bin/sh is used.
If a file ~/.emacs_SHELLNAME exists, it is given as initial input, simulating
a start-up file for the shell like .profile or .cshrc. Note that this may
lose due to a timing error if the shell discards input when it starts up.
The buffer is put in shell-mode, giving commands for sending input
and controlling the subjobs of the shell.
The shell file name, sans directories, is used to make a symbol name
such as `explicit-csh-arguments'. If that symbol is a variable,
its value is used as a list of arguments when invoking the shell.
Otherwise, one argument `-i' is passed to the shell.
\(Type \\[describe-mode] in the shell buffer for a list of commands.)"
(
interactive
)
(
cond
((
not
(
comint-check-proc
"*shell*"
))
(
let*
((
prog
(
or
explicit-shell-file-name
(
getenv
"ESHELL"
)
(
getenv
"SHELL"
)
"/bin/sh"
))
(
name
(
file-name-nondirectory
prog
))
(
startfile
(
concat
"~/.emacs_"
name
))
(
xargs-name
(
intern-soft
(
concat
"explicit-"
name
"-args"
))))
(
set-buffer
(
apply
'make-comint
"shell"
prog
(
if
(
file-exists-p
startfile
)
startfile
)
(
if
(
and
xargs-name
(
boundp
xargs-name
))
(
symbol-value
xargs-name
)
'
(
"-i"
))))
(
shell-mode
))))
(
switch-to-buffer
"*shell*"
))
;;; Directory tracking
;;; ===========================================================================
;;; This code provides the shell mode input sentinel
;;; SHELL-DIRECTORY-TRACKER
;;; that tracks cd, pushd, and popd commands issued to the shell, and
;;; changes the current directory of the shell buffer accordingly.
;;;
;;; This is basically a fragile hack, although it's more accurate than
;;; the original version in shell.el. It has the following failings:
;;; 1. It doesn't know about the cdpath shell variable.
;;; 2. It only spots the first command in a command sequence. E.g., it will
;;; miss the cd in "ls; cd foo"
;;; 3. More generally, any complex command (like ";" sequencing) is going to
;;; throw it. Otherwise, you'd have to build an entire shell interpreter in
;;; emacs lisp. Failing that, there's no way to catch shell commands where
;;; cd's are buried inside conditional expressions, aliases, and so forth.
;;;
;;; The whole approach is a crock. Shell aliases mess it up. File sourcing
;;; messes it up. You run other processes under the shell; these each have
;;; separate working directories, and some have commands for manipulating
;;; their w.d.'s (e.g., the lcd command in ftp). Some of these programs have
;;; commands that do *not* effect the current w.d. at all, but look like they
;;; do (e.g., the cd command in ftp). In shells that allow you job
;;; control, you can switch between jobs, all having different w.d.'s. So
;;; simply saying %3 can shift your w.d..
;;;
;;; The solution is to relax, not stress out about it, and settle for
;;; a hack that works pretty well in typical circumstances. Remember
;;; that a half-assed solution is more in keeping with the spirit of Unix,
;;; anyway. Blech.
;;;
;;; One good hack not implemented here for users of programmable shells
;;; is to program up the shell w.d. manipulation commands to output
;;; a coded command sequence to the tty. Something like
;;; ESC | <cwd> |
;;; where <cwd> is the new current working directory. Then trash the
;;; directory tracking machinery currently used in this package, and
;;; replace it with a process filter that watches for and strips out
;;; these messages.
;;; REGEXP is a regular expression. STR is a string. START is a fixnum.
;;; Returns T if REGEXP matches STR where the match is anchored to start
;;; at position START in STR. Sort of like LOOKING-AT for strings.
(
defun
shell-front-match
(
regexp
str
start
)
(
eq
start
(
string-match
regexp
str
start
)))
(
defun
shell-directory-tracker
(
str
)
"Tracks cd, pushd and popd commands issued to the shell.
This function is called on each input passed to the shell.
It watches for cd, pushd and popd commands and sets the buffer's
default directory to track these commands.
You may toggle this tracking on and off with M-x dirtrack-toggle.
If emacs gets confused, you can resync with the shell with M-x dirs.
See variables shell-cd-regexp, shell-pushd-regexp, and shell-popd-regexp.
Environment variables are expanded, see function substitute-in-file-name."
(
condition-case
err
(
cond
(
shell-dirtrackp
(
string-match
"^\\s *"
str
)
; skip whitespace
(
let
((
bos
(
match-end
0
))
(
x
nil
))
(
cond
((
setq
x
(
shell-match-cmd-w/optional-arg
shell-popd-regexp
str
bos
))
(
shell-process-popd
(
substitute-in-file-name
x
)))
((
setq
x
(
shell-match-cmd-w/optional-arg
shell-pushd-regexp
str
bos
))
(
shell-process-pushd
(
substitute-in-file-name
x
)))
((
setq
x
(
shell-match-cmd-w/optional-arg
shell-cd-regexp
str
bos
))
(
shell-process-cd
(
substitute-in-file-name
x
)))))))
(
error
(
message
(
car
(
cdr
err
))))))
;;; Try to match regexp CMD to string, anchored at position START.
;;; CMD may be followed by a single argument. If a match, then return
;;; the argument, if there is one, or the empty string if not. If
;;; no match, return nil.
(
defun
shell-match-cmd-w/optional-arg
(
cmd
str
start
)
(
and
(
shell-front-match
cmd
str
start
)
(
let
((
eoc
(
match-end
0
)))
; end of command
(
cond
((
shell-front-match
"\\s *\\(\;\\|$\\)"
str
eoc
)
""
)
; no arg
((
shell-front-match
"\\s +\\([^ \t\;]+\\)\\s *\\(\;\\|$\\)"
str
eoc
)
(
substring
str
(
match-beginning
1
)
(
match-end
1
)))
; arg
(
t
nil
)))))
; something else.
;;; The first regexp is [optional whitespace, (";" or the end of string)].
;;; The second regexp is [whitespace, (an arg), optional whitespace,
;;; (";" or end of string)].
;;; popd [+n]
(
defun
shell-process-popd
(
arg
)
(
let
((
num
(
if
(
zerop
(
length
arg
))
0
; no arg means +0
(
shell-extract-num
arg
))))
(
if
(
and
num
(
<
num
(
length
shell-dirstack
)))
(
if
(
=
num
0
)
; condition-case because the CD could lose.
(
condition-case
nil
(
progn
(
cd
(
car
shell-dirstack
))
(
setq
shell-dirstack
(
cdr
shell-dirstack
))
(
shell-dirstack-message
))
(
error
(
message
"Couldn't cd."
)))
(
let*
((
ds
(
cons
nil
shell-dirstack
))
(
cell
(
nthcdr
(
-
num
1
)
ds
)))
(
rplacd
cell
(
cdr
(
cdr
cell
)))
(
setq
shell-dirstack
(
cdr
ds
))
(
shell-dirstack-message
)))
(
message
"Bad popd."
))))
;;; cd [dir]
(
defun
shell-process-cd
(
arg
)
(
condition-case
nil
(
progn
(
cd
(
if
(
zerop
(
length
arg
))
(
getenv
"HOME"
)
arg
))
(
shell-dirstack-message
))
(
error
(
message
"Couldn't cd."
))))
;;; pushd [+n | dir]
(
defun
shell-process-pushd
(
arg
)
(
if
(
zerop
(
length
arg
))
;; no arg -- swap pwd and car of shell stack
(
condition-case
nil
(
if
shell-dirstack
(
let
((
old
default-directory
))
(
cd
(
car
shell-dirstack
))
(
setq
shell-dirstack
(
cons
old
(
cdr
shell-dirstack
)))
(
shell-dirstack-message
))
(
message
"Directory stack empty."
))
(
message
"Couldn't cd."
))
(
let
((
num
(
shell-extract-num
arg
)))
(
if
num
; pushd +n
(
if
(
>
num
(
length
shell-dirstack
))
(
message
"Directory stack not that deep."
)
(
let*
((
ds
(
cons
default-directory
shell-dirstack
))
(
dslen
(
length
ds
))
(
front
(
nthcdr
num
ds
))
(
back
(
reverse
(
nthcdr
(
-
dslen
num
)
(
reverse
ds
))))
(
new-ds
(
append
front
back
)))
(
condition-case
nil
(
progn
(
cd
(
car
new-ds
))
(
setq
shell-dirstack
(
cdr
new-ds
))
(
shell-dirstack-message
))
(
error
(
message
"Couldn't cd."
)))))
;; pushd <dir>
(
let
((
old-wd
default-directory
))
(
condition-case
nil
(
progn
(
cd
arg
)
(
setq
shell-dirstack
(
cons
old-wd
shell-dirstack
))
(
shell-dirstack-message
))
(
error
(
message
"Couldn't cd."
))))))))
;; If STR is of the form +n, for n>0, return n. Otherwise, nil.
(
defun
shell-extract-num
(
str
)
(
and
(
string-match
"^\\+[1-9][0-9]*$"
str
)
(
string-to-int
str
)))
(
defun
shell-dirtrack-toggle
()
"Turn directory tracking on and off in a shell buffer."
(
interactive
)
(
setq
shell-dirtrackp
(
not
shell-dirtrackp
))
(
message
"directory tracking %s."
(
if
shell-dirtrackp
"ON"
"OFF"
)))
;;; For your typing convenience:
(
fset
'dirtrack-toggle
'shell-dirtrack-toggle
)
(
defun
shell-resync-dirs
()
"Resync the buffer's idea of the current directory stack.
This command queries the shell with the command bound to
shell-dirstack-query (default \"dirs\"), reads the next
line output and parses it to form the new directory stack.
DON'T issue this command unless the buffer is at a shell prompt.
Also, note that if some other subprocess decides to do output
immediately after the query, its output will be taken as the
new directory stack -- you lose. If this happens, just do the
command again."
(
interactive
)
(
let*
((
proc
(
get-buffer-process
(
current-buffer
)))
(
pmark
(
process-mark
proc
)))
(
goto-char
pmark
)
(
insert
shell-dirstack-query
)
(
insert
"\n"
)
(
sit-for
0
)
; force redisplay
(
comint-send-string
proc
shell-dirstack-query
)
(
comint-send-string
proc
"\n"
)
(
set-marker
pmark
(
point
))
(
let
((
pt
(
point
)))
; wait for 1 line
;; This extra newline prevents the user's pending input from spoofing us.
(
insert
"\n"
)
(
backward-char
1
)
(
while
(
not
(
looking-at
".+\n"
))
(
accept-process-output
proc
)
(
goto-char
pt
)))
(
goto-char
pmark
)
(
delete-char
1
)
; remove the extra newline
;; That's the dirlist. grab it & parse it.
(
let*
((
dl
(
buffer-substring
(
match-beginning
0
)
(
-
(
match-end
0
)
1
)))
(
dl-len
(
length
dl
))
(
ds
'
())
; new dir stack
(
i
0
))
(
while
(
<
i
dl-len
)
;; regexp = optional whitespace, (non-whitespace), optional whitespace
(
string-match
"\\s *\\(\\S +\\)\\s *"
dl
i
)
; pick off next dir
(
setq
ds
(
cons
(
substring
dl
(
match-beginning
1
)
(
match-end
1
))
ds
))
(
setq
i
(
match-end
0
)))
(
let
((
ds
(
reverse
ds
)))
(
condition-case
nil
(
progn
(
cd
(
car
ds
))
(
setq
shell-dirstack
(
cdr
ds
))
(
shell-dirstack-message
))
(
error
(
message
"Couldn't cd."
)))))))
;;; For your typing convenience:
(
fset
'dirs
'shell-resync-dirs
)
;;; Show the current dirstack on the message line.
;;; Pretty up dirs a bit by changing "/usr/jqr/foo" to "~/foo".
;;; (This isn't necessary if the dirlisting is generated with a simple "dirs".)
;;; All the commands that mung the buffer's dirstack finish by calling
;;; this guy.
(
defun
shell-dirstack-message
()
(
let
((
msg
""
)
(
ds
(
cons
default-directory
shell-dirstack
)))
(
while
ds
(
let
((
dir
(
car
ds
)))
(
if
(
string-match
(
format
"^%s\\(/\\|$\\)"
(
getenv
"HOME"
))
dir
)
(
setq
dir
(
concat
"~/"
(
substring
dir
(
match-end
0
)))))
(
if
(
string-equal
dir
"~/"
)
(
setq
dir
"~"
))
(
setq
msg
(
concat
msg
dir
" "
))
(
setq
ds
(
cdr
ds
))))
(
message
msg
)))
lisp/subr.el
0 → 100644
View file @
be9b65ac
;; Basic lisp subroutines for Emacs
;; Copyright (C) 1985, 1986 Free Software Foundation, Inc.
;; 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.
(
defun
one-window-p
(
&optional
arg
)
"Returns non-nil if there is only one window.
Optional arg NOMINI non-nil means don't count the minibuffer
even if it is active."
(
eq
(
selected-window
)
(
next-window
(
selected-window
)
(
if
arg
'arg
))))
(
defun
walk-windows
(
proc
&optional
minibuf
all-screens
)
"Cycle through all visible windows, calling PROC for each one.
PROC is called with a window as argument.
Optional second arg MINIBUF t means count the minibuffer window
even if not active. If MINIBUF is neither t nor nil it means
not to count the minibuffer even if it is active.
Optional third arg ALL-SCREENS t means include all windows in all screens;
otherwise cycle within the selected screen."
(
let*
((
walk-windows-start
(
selected-window
))
(
walk-windows-current
walk-windows-start
))
(
while
(
progn
(
setq
walk-windows-current
(
next-window
walk-windows-current
minibuf
all-screens
))
(
funcall
proc
walk-windows-current
)
(
not
(
eq
walk-windows-current
walk-windows-start
))))))
(
defun
read-quoted-char
(
&optional
prompt
)
"Like `read-char', except that if the first character read is an octal
digit, we read up to two more octal digits and return the character
represented by the octal number consisting of those digits.
Optional argument PROMPT specifies a string to use to prompt the user."
(
let
((
count
0
)
(
code
0
)
char
)
(
while
(
<
count
3
)
(
let
((
inhibit-quit
(
zerop
count
))
(
help-form
nil
))
(
and
prompt
(
message
"%s-"
prompt
))
(
setq
char
(
read-char
))
(
if
inhibit-quit
(
setq
quit-flag
nil
)))
(
cond
((
null
char
))
((
and
(
<=
?0
char
)
(
<=
char
?7
))
(
setq
code
(
+
(
*
code
8
)
(
-
char
?0
))
count
(
1+
count
))
(
and
prompt
(
message
(
setq
prompt
(
format
"%s %c"
prompt
char
)))))
((
>
count
0
)
(
setq
unread-command-char
char
count
259
))
(
t
(
setq
code
char
count
259
))))
(
logand
255
code
)))
(
defun
error
(
&rest
args
)
"Signal an error, making error message by passing all args to `format'."
(
while
t
(
signal
'error
(
list
(
apply
'format
args
)))))
(
defun
undefined
()
(
interactive
)
(
ding
))
;Prevent the \{...} documentation construct
;from mentioning keys that run this command.
(
put
'undefined
'suppress-keymap
t
)
(
defun
suppress-keymap
(
map
&optional
nodigits
)
"Make MAP override all normally self-inserting keys to be undefined.
Normally, as an exception, digits and minus-sign are set to make prefix args,
but optional second arg NODIGITS non-nil treats them like other chars."
(
let
((
i
0
))
(
while
(
<=
i
127
)
(
if
(
eql
(
lookup-key
global-map
(
char-to-string
i
))
'self-insert-command
)
(
define-key
map
(
char-to-string
i
)
'undefined
))
(
setq
i
(
1+
i
))))
(
or
nodigits
(
let
(
loop
)
(
define-key
map
"-"
'negative-argument
)
;; Make plain numbers do numeric args.
(
setq
loop
?0
)
(
while
(
<=
loop
?9
)
(
define-key
map
(
char-to-string
loop
)
'digit-argument
)
(
setq
loop
(
1+
loop
))))))
;; now in fns.c
;(defun nth (n list)
; "Returns the Nth element of LIST.
;N counts from zero. If LIST is not that long, nil is returned."
; (car (nthcdr n list)))
;
;(defun copy-alist (alist)
; "Return a copy of ALIST.
;This is a new alist which represents the same mapping
;from objects to objects, but does not share the alist structure with ALIST.
;The objects mapped (cars and cdrs of elements of the alist)
;are shared, however."
; (setq alist (copy-sequence alist))
; (let ((tail alist))
; (while tail
; (if (consp (car tail))
; (setcar tail (cons (car (car tail)) (cdr (car tail)))))
; (setq tail (cdr tail))))
; alist)
;Moved to keymap.c
;(defun copy-keymap (keymap)
; "Return a copy of KEYMAP"
; (while (not (keymapp keymap))
; (setq keymap (signal 'wrong-type-argument (list 'keymapp keymap))))
; (if (vectorp keymap)
; (copy-sequence keymap)
; (copy-alist keymap)))
(
defun
substitute-key-definition
(
olddef
newdef
keymap
)
"Replace OLDDEF with NEWDEF for any keys in KEYMAP now defined as OLDDEF.
In other words, OLDDEF is replaced with NEWDEF where ever it appears.
Prefix keymaps reached from KEYMAP are not checked recursively;
perhaps they ought to be."
(
if
(
arrayp
keymap
)
(
let
((
len
(
length
keymap
))
(
i
0
))
(
while
(
<
i
len
)
(
if
(
eq
(
aref
keymap
i
)
olddef
)
(
aset
keymap
i
newdef
))
(
setq
i
(
1+
i
))))
(
while
keymap
(
if
(
eq
(
cdr-safe
(
car-safe
keymap
))
olddef
)
(
setcdr
(
car
keymap
)
newdef
))
(
setq
keymap
(
cdr
keymap
)))))
;; Avoids useless byte-compilation.
;; In the future, would be better to fix byte compiler
;; not to really compile in cases like this,
;; and use defun here.
(
fset
'ignore
'
(
lambda
(
&rest
ignore
)
nil
))
; old names
(
fset
'make-syntax-table
'copy-syntax-table
)
(
fset
'dot
'point
)
(
fset
'dot-marker
'point-marker
)
(
fset
'dot-min
'point-min
)
(
fset
'dot-max
'point-max
)
(
fset
'window-dot
'window-point
)
(
fset
'set-window-dot
'set-window-point
)
(
fset
'read-input
'read-string
)
(
fset
'send-string
'process-send-string
)
(
fset
'send-region
'process-send-region
)
(
fset
'show-buffer
'set-window-buffer
)
(
fset
'buffer-flush-undo
'buffer-disable-undo
)
; alternate names
(
fset
'string=
'string-equal
)
(
fset
'string<
'string-lessp
)
(
fset
'move-marker
'set-marker
)
(
fset
'eql
'eq
)
(
fset
'not
'null
)
(
fset
'numberp
'integerp
)
(
fset
'rplaca
'setcar
)
(
fset
'rplacd
'setcdr
)
(
fset
'beep
'ding
)
;preserve lingual purtity
(
fset
'indent-to-column
'indent-to
)
(
fset
'backward-delete-char
'delete-backward-char
)
(
defvar
global-map
nil
"Default global keymap mapping Emacs keyboard input into commands.
The value is a keymap which is usually (but not necessarily) Emacs's
global map."
)
(
defvar
ctl-x-map
nil
"Default keymap for C-x commands.
The normal global definition of the character C-x indirects to this keymap."
)
(
defvar
esc-map
nil
"Default keymap for ESC (meta) commands.
The normal global definition of the character ESC indirects to this keymap."
)
(
defvar
mouse-map
nil
"Keymap for mouse commands from the X window system."
)
(
defun
run-hooks
(
&rest
hooklist
)
"Takes hook names and runs each one in turn. Major mode functions use this.
Each argument should be a symbol, a hook variable.
These symbols are processed in the order specified.
If a hook symbol has a non-nil value, that value may be a function
or a list of functions to be called to run the hook.
If the value is a function, it is called with no arguments.
If it is a list, the elements are called, in order, with no arguments."
(
while
hooklist
(
let
((
sym
(
car
hooklist
)))
(
and
(
boundp
sym
)
(
symbol-value
sym
)
(
let
((
value
(
symbol-value
sym
)))
(
if
(
and
(
listp
value
)
(
not
(
eq
(
car
value
)
'lambda
)))
(
mapcar
'funcall
value
)
(
funcall
value
)))))
(
setq
hooklist
(
cdr
hooklist
))))
;; Tell C code how to call this function.
(
defconst
run-hooks
'run-hooks
"Variable by which C primitives find the function `run-hooks'.
Don't change it."
)
(
defun
add-hook
(
hook
function
)
"Add to the value of HOOK the function FUNCTION unless already present.
HOOK should be a symbol, and FUNCTION may be any valid function.
HOOK's value should be a list of functions, not a single function.
If HOOK is void, it is first set to nil."
(
or
(
boundp
hook
)
(
set
hook
nil
))
(
or
(
if
(
consp
function
)
;; Clever way to tell whether a given lambda-expression
;; is equal to anything in the hook.
(
let
((
tail
(
assoc
(
cdr
function
)
(
symbol-value
hook
))))
(
equal
function
tail
))
(
memq
function
(
symbol-value
hook
)))
(
set
hook
(
cons
function
hook
))))
(
defun
momentary-string-display
(
string
pos
&optional
exit-char
message
)
"Momentarily display STRING in the buffer at POS.
Display remains until next character is typed.
If the char is EXIT-CHAR (optional third arg, default is SPC) it is swallowed;
otherwise it is then available as input (as a command if nothing else).
Display MESSAGE (optional fourth arg) in the echo area.
If MESSAGE is nil, instructions to type EXIT-CHAR are displayed there."