home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Atari Mega Archive 1
/
Atari Mega Archive - Volume 1.iso
/
gnu
/
emacs
/
emacs1857
/
bin_d2.zoo
/
lisp
/
view.el
< prev
next >
Wrap
Lisp/Scheme
|
1991-12-02
|
15KB
|
360 lines
;; View: Peruse file or buffer without editing.
;; Copyright (C) 1985 Free Software Foundation, Inc.
;; Principal author K. Shane Hartman
;; 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.
(provide 'view)
(defvar view-mode-map nil)
(if view-mode-map
nil
(setq view-mode-map (make-keymap))
(fillarray view-mode-map 'View-undefined)
(define-key view-mode-map "\C-c" 'exit-recursive-edit)
(define-key view-mode-map "\C-z" 'suspend-emacs)
(define-key view-mode-map "q" 'exit-recursive-edit)
(define-key view-mode-map "-" 'negative-argument)
(define-key view-mode-map "0" 'digit-argument)
(define-key view-mode-map "1" 'digit-argument)
(define-key view-mode-map "2" 'digit-argument)
(define-key view-mode-map "3" 'digit-argument)
(define-key view-mode-map "4" 'digit-argument)
(define-key view-mode-map "5" 'digit-argument)
(define-key view-mode-map "6" 'digit-argument)
(define-key view-mode-map "7" 'digit-argument)
(define-key view-mode-map "8" 'digit-argument)
(define-key view-mode-map "9" 'digit-argument)
(define-key view-mode-map "\C-u" 'universal-argument)
(define-key view-mode-map "\e" nil)
(define-key view-mode-map "\C-x" 'Control-X-prefix)
(define-key view-mode-map "\e-" 'negative-argument)
(define-key view-mode-map "\e0" 'digit-argument)
(define-key view-mode-map "\e1" 'digit-argument)
(define-key view-mode-map "\e2" 'digit-argument)
(define-key view-mode-map "\e3" 'digit-argument)
(define-key view-mode-map "\e4" 'digit-argument)
(define-key view-mode-map "\e5" 'digit-argument)
(define-key view-mode-map "\e6" 'digit-argument)
(define-key view-mode-map "\e7" 'digit-argument)
(define-key view-mode-map "\e8" 'digit-argument)
(define-key view-mode-map "\e9" 'digit-argument)
(define-key view-mode-map "<" 'beginning-of-buffer)
(define-key view-mode-map ">" 'end-of-buffer)
(define-key view-mode-map "\ev" 'View-scroll-lines-backward)
(define-key view-mode-map "\C-v" 'View-scroll-lines-forward)
(define-key view-mode-map " " 'View-scroll-lines-forward)
(define-key view-mode-map "\177" 'View-scroll-lines-backward)
(define-key view-mode-map "\n" 'View-scroll-one-more-line)
(define-key view-mode-map "\r" 'View-scroll-one-more-line)
(define-key view-mode-map "\C-l" 'recenter)
(define-key view-mode-map "z" 'View-scroll-lines-forward-set-scroll-size)
(define-key view-mode-map "g" 'View-goto-line)
(define-key view-mode-map "=" 'what-line)
(define-key view-mode-map "." 'set-mark-command)
(define-key view-mode-map "\C-@" 'set-mark-command)
(define-key view-mode-map "'" 'View-back-to-mark)
(define-key view-mode-map "@" 'View-back-to-mark)
(define-key view-mode-map "x" 'exchange-point-and-mark)
(define-key view-mode-map "h" 'Helper-describe-bindings)
(define-key view-mode-map "?" 'Helper-describe-bindings)
(define-key view-mode-map "\C-h" 'Helper-help)
(define-key view-mode-map "\C-n" 'next-line)
(define-key view-mode-map "\C-p" 'previous-line)
(define-key view-mode-map "\C-s" 'isearch-forward)
(define-key view-mode-map "\C-r" 'isearch-backward)
(define-key view-mode-map "s" 'isearch-forward)
(define-key view-mode-map "r" 'isearch-backward)
(define-key view-mode-map "/" 'View-search-regexp-forward)
(define-key view-mode-map "\\" 'View-search-regexp-backward)
;; This conflicts with the standard binding of isearch-regexp-forward
(define-key view-mode-map "\e\C-s" 'View-search-regexp-forward)
(define-key view-mode-map "\e\C-r" 'View-search-regexp-backward)
(define-key view-mode-map "n" 'View-search-last-regexp-forward)
(define-key view-mode-map "p" 'View-search-last-regexp-backward)
)
(defun view-file (file-name)
"View FILE in View mode, returning to previous buffer when done.
The usual Emacs commands are not available; instead,
a special set of commands (mostly letters and punctuation)
are defined for moving around in the buffer.
Space scrolls forward, Delete scrolls backward.
For list of all View commands, type ? or h while viewing.
Calls the value of view-hook if that is non-nil."
(interactive "fView file: ")
(let ((had-a-buf (get-file-buffer file-name))
(buf-to-view nil))
(unwind-protect
(view-mode (prog1 (current-buffer)
(switch-to-buffer
(setq buf-to-view (find-file-noselect file-name)) t)))
(and (not had-a-buf) buf-to-view (not (buffer-modified-p buf-to-view))
(kill-buffer buf-to-view)))))
(defun view-buffer (buffer-name)
"View BUFFER in View mode, returning to previous buffer when done.
The usual Emacs commands are not available; instead,
a special set of commands (mostly letters and punctuation)
are defined for moving around in the buffer.
Space scrolls forward, Delete scrolls backward.
For list of all View commands, type ? or h while viewing.
Calls the value of view-hook if that is non-nil."
(interactive "bView buffer: ")
(view-mode (prog1 (current-buffer) (switch-to-buffer buffer-name))))
(defun view-mode (&optional view-return-to-buffer)
"Major mode for viewing text but not editing it.
Letters do not insert themselves. Instead these commands are provided.
Most commands take prefix arguments. Commands dealing with lines
default to \"scroll size\" lines (initially size of window).
Search commands default to a repeat count of one.
M-< or < move to beginning of buffer.
M-> or > move to end of buffer.
C-v or Space scroll forward lines.
M-v or DEL scroll backward lines.
CR or LF scroll forward one line (backward with prefix argument).
z like Space except set number of lines for further
scrolling commands to scroll by.
C-u and Digits provide prefix arguments. `-' denotes negative argument.
= prints the current line number.
g goes to line given by prefix argument.
/ or M-C-s searches forward for regular expression
\\ or M-C-r searches backward for regular expression.
n searches forward for last regular expression.
p searches backward for last regular expression.
C-@ or . set the mark.
x exchanges point and mark.
C-s or s do forward incremental search.
C-r or r do reverse incremental search.
@ or ' return to mark and pops mark ring.
Mark ring is pushed at start of every
successful search and when jump to line to occurs.
The mark is set on jump to buffer start or end.
? or h provide help message (list of commands).
C-h provides help (list of commands or description of a command).
C-n moves down lines vertically.
C-p moves upward lines vertically.
C-l recenters the screen.
q or C-c exit view-mode and return to previous buffer.
Entry to this mode calls the value of view-hook if non-nil.
\\{view-mode-map}"
; Not interactive because dangerous things happen
; if you call it without passing a buffer as argument
; and they are not easy to fix.
; (interactive)
(let* ((view-buffer-window (selected-window))
(view-scroll-size nil))
(unwind-protect
(let ((buffer-read-only t)
(mode-line-buffer-identification
(list
(if (buffer-file-name)
"Viewing %f"
"Viewing %b")))
(mode-name "View"))
(beginning-of-line)
(catch 'view-mode-exit (view-mode-command-loop)))
(if view-return-to-buffer
(switch-to-buffer view-return-to-buffer)))))
(defun view-helpful-message ()
(message
(if (and (eq (key-binding "\C-h") 'Helper-help)
(eq (key-binding "?") 'Helper-describe-bindings)
(eq (key-binding "\C-c") 'exit-recursive-edit))
"Type C-h for help, ? for commands, C-c to quit"
(substitute-command-keys
"Type \\[Helper-help] fo