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- ;;; edt.el --- EDT emulation in Emacs
-
- ;; Copyright (C) 1986 Free Software Foundation, Inc.
-
- ;; Author: Mike Clarkson <mike@yetti.UUCP>
- ;; Maintainer: FSF
- ;; Created: 27 Aug 1986
- ;; Keywords: emulations
-
- ;; This started from public domain code by Mike Clarkson
- ;; but has been greatly altered.
-
- ;; 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, 675 Mass Ave, Cambridge, MA 02139, USA.
-
- ;;; Commentary:
-
- ;; Here's my EDT emulation for GNU Emacs that is based on the EDT emulation
- ;; for Gosling's Emacs sent out on the net a couple of years ago by Lynn Olson
- ;; at Tektronics. This emulation was widely distributed as the file edt.ml
- ;; in the maclib directory of most Emacs distributions.
- ;;
- ;; I will gladly take all criticisms and complaints to heart, and will fix what
- ;; bugs I can find. As this is my first Emacs Lisp hack, you may have to root
- ;; out a few nasties hidden in the code. Please let me know if you find any
- ;; (sorry, no rewards :-). I would also be interested if there are better,
- ;; cleaner, faster ways of doing some of the things that I have done.
- ;;
- ;; You must understand some design considerations that I had in mind.
- ;; The intention was not really to "emulate" EDT, but rather to take advantage
- ;; of the years of EDT experience that had accumulated in my right hand,
- ;; while at the same time taking advantage of EMACS.
- ;;
- ;; Some major differences are:
- ;;
- ;; HELP is describe-key;
- ;; GOLD/HELP is describe-function;
- ;; FIND is isearch-forward/backward;
- ;; GOLD/HELP is occur-menu, which finds all instances of a search string;
- ;; ENTER is other-window;
- ;; SUBS is subprocess-command. Note that you have to change this
- ;; to `shell' if you are running Un*x;
- ;; PAGE is next-paragraph, because that's more useful than page.
- ;; SPECINS is copy-to-killring;
- ;; GOLD/GOLD is mark-section-wisely, which is my command to mark the
- ;; section in a manner consistent with the major-mode. It
- ;; uses mark-defun for emacs-lisp, lisp, mark-c-function for C,
- ;; and mark-paragraph for other modes.
- ;;
- ;;
- ;; Some subtle differences are:
- ;;
- ;; APPEND is append-to-buffer. One doesn't append to the kill ring
- ;; much and SPECINS is now copy-to-killring;
- ;; REPLACE is replace-regexp;
- ;; FILL is fill-region-wisely, which uses indent-region for C, lisp
- ;; emacs-lisp, and fill-region for others. It asks if you
- ;; really want to fill-region in TeX-mode, because I find this
- ;; to be very dangerous.
- ;; CHNGCASE is case-flip for the character under the cursor only.
- ;; I felt that case-flip region is unlikely, as usually you
- ;; upcase-region or downcase region. Also, unlike EDT it
- ;; is independent of the direction you are going, as that
- ;; drives me nuts.
- ;;
- ;; I use Emacs definition of what a word is. This is considerably different
- ;; from what EDT thinks a word is. This is not good for dyed-in-the-wool EDT
- ;; fans, but is probably preferable for experienced Emacs users. My assumption
- ;; is that the former are a dying breed now that GNU Emacs has made it to VMS,
- ;; but let me know how you feel. Also, when you undelete a word it leave the
- ;; point at the end of the undeleted text, rather than the beginning. I might
- ;; change this as I'm not sure if I like this or not. I'm also not sure if I
- ;; want it to set the mark each time you delete a character or word.
- ;;
- ;; Backspace does not invoke beginning-of-line, because ^H is the help prefix,
- ;; and I felt it should be left as such. You can change this if you like.
- ;;
- ;; The ADVANCE and BACKUP keys do not work as terminators for forward or
- ;; backward searches. In Emacs, all search strings are terminated by return.
- ;; The searches will however go forward or backward depending on your current
- ;; direction. Also, when you change directions, the mode line will not be
- ;; updated immediately, but only when you next execute an emacs function.
- ;; Personally, I consider this to be a bug, not a feature.
- ;;
- ;; This should also work with VT-2xx's, though I haven't tested it extensively
- ;; on those terminals. It assumes that the CSI-map of vt_200.el has been
- ;; defined.
- ;;
- ;; There are also a whole bunch of GOLD letter, and GOLD character bindings:
- ;; look at edtdoc.el for them, or better still, look at the edt.el lisp code,
- ;; because after all, in the true Lisp tradition, the source code is *assumed*
- ;; to be self-documenting :-)
- ;;
- ;; Mike Clarkson, ...!allegra \ BITNET: mike@YUYETTI or
- ;; CRESS, York University, ...!decvax \ SYMALG@YUSOL
- ;; 4700 Keele Street, ...!ihnp4 > !utzoo!yetti!mike
- ;; North York, Ontario, ...!linus /
- ;; CANADA M3J 1P3. ...!watmath / Phone: +1 (416) 736-2100 x 7767
- ;;
- ;; Note that I am not on ARPA, and must gateway any ARPA mail through BITNET or
- ;; UUCP. If you have a UUCP or BITNET address please use it for communication
- ;; so that I can reach you directly. If you have both, the BITNET address
- ;; is preferred.
-
- ;;; Code:
-
- (defvar edt-last-deleted-lines ""
- "Last text deleted by an EDT emulation `line-delete' command.")
- (defvar edt-last-deleted-words ""
- "Last text deleted by an EDT emulation `word-delete' command.")
- (defvar edt-last-deleted-chars ""
- "Last text deleted by an EDT emulation `character-delete' command.")
-
- (defun delete-current-line (num)
- "Delete one or specified number of lines after point.
- This includes the newline character at the end of each line.
- They are saved for the EDT `undelete-lines' command."
- (interactive "p")
- (let ((beg (point)))
- (forward-line num)
- (if (not (eq (preceding-char) ?\n))
- (insert "\n"))
- (setq edt-last-deleted-lines
- (buffer-substring beg (point)))
- (delete-region beg (point))))
-
- (defun delete-to-eol (num)
- "Delete text up to end of line.
- With argument, delete up to to Nth line-end past point.
- They are saved for the EDT `undelete-lines' command."
- (interactive "p")
- (let ((beg (point)))
- (forward-char 1)
- (end-of-line num)
- (setq edt-last-deleted-lines
- (buffer-substring beg (point)))
- (delete-region beg (point))))
-
- (defun delete-current-word (num)
- "Delete one or specified number of words after point.
- They are saved for the EDT `undelete-words' command."
- (interactive "p")
- (let ((beg (point)))
- (forward-word num)
- (setq edt-last-deleted-words
- (buffer-substring beg (point)))
- (delete-region beg (point))))
-
- (defun edt-delete-previous-word (num)
- "Delete one or specified number of words before point.
- They are saved for the EDT `undelete-words' command."
- (interactive "p")
- (let ((beg (point)))
- (forward-word (- num))
- (setq edt-last-deleted-words
- (buffer-substring (point) beg))
- (delete-region beg (point))))
-
- (defun delete-current-char (num)
- "Delete one or specified number of characters after point.
- They are saved for the EDT `undelete-chars' command."
- (interactive "p")
- (setq edt-last-deleted-chars
- (buffer-substring (point) (min (point-max) (+ (point) num))))
- (delete-region (point) (min (point-max) (+ (point) num))))
-
- (defun delete-previous-char (num)
- "Delete one or specified number of characters before point.
- They are saved for the EDT `undelete-chars' command."
- (interactive "p")
- (setq edt-last-deleted-chars
- (buffer-substring (max (point-min) (- (point) num)) (point)))
- (delete-region (max (point-min) (- (point) num)) (point)))
-
- (defun undelete-lines ()
- "Yank lines deleted by last EDT `line-delete' command."
- (interactive)
- (insert edt-last-deleted-lines))
-
- (defun undelete-words ()
- "Yank words deleted by last EDT `word-delete' command."
- (interactive)
- (insert edt-last-deleted-words))
-
- (defun undelete-chars ()
- "Yank characters deleted by last EDT `character-delete' command."
- (interactive)
- (insert edt-last-deleted-chars))
-
- (defun next-end-of-line (num)
- "Move to end of line; if at end, move to end of next line.
- Accepts a prefix argument for the number of lines to move."
- (interactive "p")
- (forward-char)
- (end-of-line num))
-
- (defun previous-end-of-line (num)
- "Move EOL upward.
- Accepts a prefix argument for the number of lines to move."
- (interactive "p")
- (end-of-line (- 1 num)))
-
- (defun forward-to-word (num)
- "Move to next word-beginning, or to Nth following word-beginning."
- (interactive "p")
- (forward-word (1+ num))
- (forward-word -1))
-
- (defun backward-to-word (num)
- "Move back to word-end, or to Nth word-end seen."
- (interactive "p")
- (forward-word (- (1+ num)))
- (forward-word 1))
-
- (defun backward-line (num)
- "Move point to start of previous line.
- Prefix argument serves as repeat-count."
- (interactive "p")
- (forward-line (- num)))
-
- (defun scroll-window-down (num)
- "Scroll the display down a window-full.
- Accepts a prefix argument for the number of window-fulls to scroll."
- (interactive "p")
- (scroll-down (- (* (window-height) num) 2)))
-
- (defun scroll-window-up (num)
- "Scroll the display up a window-full.
- Accepts a prefix argument for the number of window-fulls to scroll."
- (interactive "p")
- (scroll-up (- (* (window-height) num) 2)))
-
- (defun next-paragraph (num)
- "Move to beginning of the next indented paragraph.
- Accepts a prefix argument for the number of paragraphs."
- (interactive "p")
- (while (> num 0)
- (next-line 1)
- (forward-paragraph)
- (previous-line 1)
- (if (eolp) (next-line 1))
- (setq num (1- num))))
-
- (defun previous-paragraph (num)
- "Move to beginning of previous indented paragraph.
- Accepts a prefix argument for the number of paragraphs."
- (interactive "p")
- (while (> num 0)
- (backward-paragraph)
- (previous-line 1)
- (if (eolp) (next-line 1))
- (setq num (1- num))))
-
- (defun move-to-beginning ()
- "Move cursor to the beginning of buffer, but don't set the mark."
- (interactive)
- (goto-char (point-min)))
-
- (defun move-to-end ()
- "Move cursor to the end of buffer, but don't set the mark."
- (interactive)
- (goto-char (point-max)))
-
- (defun goto-percent (perc)
- "Move point to ARG percentage of the buffer."
- (interactive "NGoto-percentage: ")
- (if (or (> perc 100) (< perc 0))
- (error "Percentage %d out of range 0 < percent < 100" perc)
- (goto-char (/ (* (point-max) perc) 100))))
-
- (defun update-mode-line ()
- "Ensure mode-line reflects all changes."
- (set-buffer-modified-p (buffer-modified-p))
- (sit-for 0))
-
- (defun advance-direction ()
- "Set EDT Advance mode so keypad commands move forward."
- (interactive)
- (setq edt-direction-string " ADVANCE")
- (global-set-key [kp-f1] 'isearch-forward)
- (global-set-key [kp-8] 'scroll-window-up)
- (global-set-key [kp-7] 'next-paragraph)
- (global-set-key [kp-1] 'forward-to-word)
- (global-set-key [kp-2] 'next-end-of-line)
- (global-set-key [kp-3] 'forward-char)
- (global-set-key [kp-0] 'forward-line)
- (update-mode-line))
-
- (defun backup-direction ()
- "Set EDT Backup mode so keypad commands move backward."
- (interactive)
- (setq edt-direction-string " BACKUP")
- (global-set-key [kp-f3] 'isearch-backward)
- (global-set-key [kp-8] 'scroll-window-down)
- (global-set-key [kp-7] 'previous-paragraph)
- (global-set-key [kp-1] 'backward-to-word)
- (global-set-key [kp-2] 'previous-end-of-line)
- (global-set-key [kp-3] 'backward-char)
- (global-set-key [kp-9] 'backward-line)
- (update-mode-line))
-
- (defun edt-beginning-of-window ()
- "Home cursor to top of window."
- (interactive)
- (move-to-window-line 0))
-
- (defun edt-line-to-bottom-of-window ()
- "Move the current line to the top of the window."
- (interactive)
- (recenter -1))
-
- (defun edt-line-to-top-of-window ()
- "Move the current line to the top of the window."
- (interactive)
- (recenter 0))
-
- (defun case-flip-character (num)
- "Change the case of the character under the cursor.
- Accepts a prefix argument of the number of characters to invert."
- (interactive "p")
- (while (> num 0)
- (funcall (if (<= ?a (following-char))
- 'upcase-region 'downcase-region)
- (point) (1+ (point)))
- (forward-char 1)
- (setq num (1- num))))
-
- (defun indent-or-fill-region ()
- "Fill region in text modes, indent region in programming language modes."
- (interactive)
- (if (string= paragraph-start "^$\\|^")
- (indent-region (point) (mark) nil)
- (fill-region (point) (mark))))
-
- (defun mark-section-wisely ()
- "Mark the section in a manner consistent with the major-mode.
- Uses mark-defun for emacs-lisp, lisp,
- mark-c-function for C,
- and mark-paragraph for other modes."
- (interactive)
- (cond ((eq major-mode 'emacs-lisp-mode)
- (mark-defun))
- ((eq major-mode 'lisp-mode)
- (mark-defun))
- ((eq major-mode 'c-mode)
- (mark-c-function))
- (t (mark-paragraph))))
-
- ;;; Key Bindings
- ;;;###autoload
- (defun edt-emulation-on ()
- "Emulate DEC's EDT editor.
- Note that many keys are rebound; including nearly all keypad keys.
- Use \\[edt-emulation-off] to undo all rebindings except the keypad keys."
- (interactive)
- (advance-direction)
- (edt-bind-gold-keypad)
- (setq edt-mode-old-c-\\ (lookup-key global-map "\C-\\"))
- (global-set-key "\C-\\" 'quoted-insert)
- (setq edt-mode-old-delete (lookup-key global-map "\177"))
- (global-set-key "\177" 'delete-previous-char) ;"Delete"
- (setq edt-mode-old-lisp-delete (lookup-key emacs-lisp-mode-map "\177"))
- (define-key emacs-lisp-mode-map "\177" 'delete-previous-char) ;"Delete"
- (define-key lisp-mode-map "\177" 'delete-previous-char) ;"Delete"
- (setq edt-mode-old-linefeed (lookup-key global-map "\C-j"))
- (global-set-key "\C-j" 'edt-delete-previous-word) ;"LineFeed"
- (define-key esc-map "?" 'apropos)) ;"<ESC>?"
-
- (defun edt-emulation-off ()
- "Return from EDT emulation to normal Emacs key bindings.
- The keys redefined by \\[edt-emulation-on] are given their old definitions."
- (interactive)
- (setq edt-direction-string nil)
- (global-set-key "\C-\\" edt-mode-old-c-\\)
- (global-set-key "\177" edt-mode-old-delete) ;"Delete"
- (define-key emacs-lisp-mode-map "\177" edt-mode-old-lisp-delete) ;"Delete"
- (define-key lisp-mode-map "\177" edt-mode-old-lisp-delete) ;"Delete"
- (global-set-key "\C-j" edt-mode-old-linefeed)) ;"LineFeed"
-
- (defvar GOLD-map (make-keymap)
- "`GOLD-map' maps the function keys on the VT100 keyboard preceded
- by the PF1 key. GOLD is the ASCII the 7-bit escape sequence <ESC>OP.")
-
- (defalias 'GOLD-prefix GOLD-map)
-
- (global-set-key [home] 'edt-beginning-of-window)
- (global-set-key [kp-f2] 'describe-key)
- (global-set-key [kp-f4] 'delete-current-line)
- (global-set-key [kp-9] 'append-to-buffer)
- (global-set-key [kp-subtract] 'delete-current-word)
- (global-set-key [kp-4] 'advance-direction)
- (global-set-key [kp-5] 'backup-direction)
- (global-set-key [kp-6] 'kill-region)
- (global-set-key [kp-separator] 'delete-current-char)
- (global-set-key [kp-decimal] 'set-mark-command)
- (global-set-key [kp-enter] 'other-window)
- (global-set-key [kp-f1] 'GOLD-prefix)
-
- ;;Bind GOLD/Keyboard keys
-
- (define-key GOLD-map "\C-g" 'keyboard-quit) ; just for safety
- (define-key GOLD-map "\177" 'delete-window) ;"Delete"
- (define-key GOLD-map "\C-h" 'delete-other-windows) ;"BackSpace"
- (define-key GOLD-map "\C-m" 'newline-and-indent) ;"Return"
- (define-key GOLD-map " " 'undo) ;"Spacebar"
- (define-key GOLD-map "%" 'goto-percent) ; "%"
- (define-key GOLD-map "=" 'goto-line) ; "="
- (define-key GOLD-map "`" 'what-line) ; "`"
- (define-key GOLD-map "\C-\\" 'split-window-vertically) ; "Control-\"
-
- ; GOLD letter combinations:
- (define-key GOLD-map "b" 'buffer-menu) ; "b"
- (define-key GOLD-map "B" 'buffer-menu) ; "B"
- (define-key GOLD-map "d" 'delete-window) ; "d"
- (define-key GOLD-map "D" 'delete-window) ; "D"
- (define-key GOLD-map "e" 'compile) ; "e"
- (define-key GOLD-map "E" 'compile) ; "E"
- (define-key GOLD-map "i" 'insert-file) ; "i"
- (define-key GOLD-map "I" 'insert-file) ; "I"
- (define-key GOLD-map "l" 'goto-line) ; "l"
- (define-key GOLD-map "L" 'goto-line) ; "L"
- (define-key GOLD-map "m" 'save-some-buffers) ; "m"
- (define-key GOLD-map "M" 'save-some-buffers) ; "m"
- (define-key GOLD-map "n" 'next-error) ; "n"
- (define-key GOLD-map "N" 'next-error) ; "N"
- (define-key GOLD-map "o" 'switch-to-buffer-other-window) ; "o"
- (define-key GOLD-map "O" 'switch-to-buffer-other-window) ; "O"
- (define-key GOLD-map "r" 'revert-file) ; "r"
- (define-key GOLD-map "r" 'revert-file) ; "R"
- (define-key GOLD-map "s" 'save-buffer) ; "s"
- (define-key GOLD-map "S" 'save-buffer) ; "S"
- (define-key GOLD-map "v" 'find-file-other-window) ; "v"
- (define-key GOLD-map "V" 'find-file-other-window) ; "V"
- (define-key GOLD-map "w" 'write-file) ; "w"
- (define-key GOLD-map "w" 'write-file) ; "W"
- ;(define-key GOLD-map "z" 'shrink-window) ; "z"
- ;(define-key GOLD-map "Z" 'shrink-window) ; "z"
-
- ;Bind GOLD/Keypad keys
- (defun edt-bind-gold-keypad ()
- (define-key GOLD-map [up] 'edt-line-to-top-of-window)
- (define-key GOLD-map [down] 'edt-line-to-bottom-of-window)
- (define-key GOLD-map [left] 'backward-sentence)
- (define-key GOLD-map [right] 'forward-sentence)
- (define-key GOLD-map [kp-f1] 'mark-section-wisely)
- (define-key GOLD-map [kp-f2] 'describe-function)
- (define-key GOLD-map [kp-f3] 'occur)
- (define-key GOLD-map [kp-f4] 'undelete-lines)
- (define-key GOLD-map [kp-0] 'open-line)
- (define-key GOLD-map [kp-1] 'case-flip-character)
- (define-key GOLD-map [kp-2] 'delete-to-eol)
- (define-key GOLD-map [kp-3] 'copy-region-as-kill)
- (define-key GOLD-map [kp-4] 'move-to-end)
- (define-key GOLD-map [kp-5] 'move-to-beginning)
- (define-key GOLD-map [kp-6] 'yank)
- (define-key GOLD-map [kp-7] 'execute-extended-command)
- (define-key GOLD-map [kp-8] 'indent-or-fill-region)
- (define-key GOLD-map [kp-9] 'replace-regexp)
- (define-key GOLD-map [kp-subtract] 'undelete-words)
- (define-key GOLD-map [kp-separator] 'undelete-chars)
- (define-key GOLD-map [kp-decimal] 'redraw-display)
- (define-key GOLD-map [kp-enter] 'shell-command))
-
- ;; Make direction of motion show in mode line
- ;; while EDT emulation is turned on.
- ;; Note that the keypad is always turned on when in Emacs.
-
- (or (assq 'edt-direction-string minor-mode-alist)
- (setq minor-mode-alist (cons '(edt-direction-string edt-direction-string)
- minor-mode-alist)))
-
- ;;; edt.el ends here
-