/
vip.el
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/
vip.el
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;;; vip.el --- a VI Package for GNU Emacs
;; Copyright (C) 1986, 1987, 1988, 1992, 1993, 1998, 2001, 2002, 2003,
;; 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, Inc.
;; Author: Masahiko Sato <ms@sail.stanford.edu>
;; Keywords: emulations
;; 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; A full-featured vi(1) emulator.
;;
;; In Japan, the author's address is: masahiko@sato.riec.tohoku.junet
;;
;; Send suggestions and bug reports to one of the above addresses.
;; When you report a bug, be sure to include the version number of VIP and
;; Emacs you are using.
;; Execute info command by typing "M-x info" to get information on VIP.
;;; Code:
(defgroup vip nil
"A VI Package for GNU Emacs."
:prefix "vip-"
:group 'emulations)
;; external variables
(defvar vip-emacs-local-map nil
"Local map used in Emacs mode. (Buffer-specific.)")
(defvar vip-insert-local-map nil
"Local map used in insert command mode. (Buffer-specific.)")
(make-variable-buffer-local 'vip-emacs-local-map)
(make-variable-buffer-local 'vip-insert-local-map)
(defvar vip-insert-point nil
"Remember insert point as a marker. (Buffer-specific.)")
(set-default 'vip-insert-point (make-marker))
(make-variable-buffer-local 'vip-insert-point)
(defvar vip-com-point nil
"Remember com point as a marker. (Buffer-specific.)")
(set-default 'vip-com-point (make-marker))
(make-variable-buffer-local 'vip-com-point)
(defvar vip-current-mode nil
"Current mode. One of `emacs-mode', `vi-mode', `insert-mode'.")
(make-variable-buffer-local 'vip-current-mode)
(setq-default vip-current-mode 'emacs-mode)
(defvar vip-emacs-mode-line-buffer-identification nil
"Value of mode-line-buffer-identification in Emacs mode within vip.")
(make-variable-buffer-local 'vip-emacs-mode-line-buffer-identification)
(setq-default vip-emacs-mode-line-buffer-identification
'("Emacs: %17b"))
(defvar vip-current-major-mode nil
"vip-current-major-mode is the major-mode vi considers it is now.
\(buffer specific\)")
(make-variable-buffer-local 'vip-current-major-mode)
(defvar vip-last-shell-com nil
"Last shell command executed by ! command.")
(defvar vip-use-register nil
"Name of register to store deleted or yanked strings.")
(defvar vip-d-com nil
"How to reexecute last destructive command. Value is list (M-COM VAL COM).")
(defcustom vip-shift-width 8
"*The number of columns shifted by > and < command."
:type 'integer
:group 'vip)
(defcustom vip-re-replace nil
"*If t then do regexp replace, if nil then do string replace."
:type 'boolean
:group 'vip)
(defvar vip-d-char nil
"The character remembered by the vi \"r\" command.")
(defvar vip-f-char nil
"For use by \";\" command.")
(defvar vip-F-char nil
"For use by \".\" command.")
(defvar vip-f-forward nil
"For use by \";\" command.")
(defvar vip-f-offset nil
"For use by \";\" command.")
(defcustom vip-search-wrap-around t
"*If t, search wraps around."
:type 'boolean
:group 'vip)
(defcustom vip-re-search nil
"*If t, search is reg-exp search, otherwise vanilla search."
:type 'boolean
:group 'vip)
(defvar vip-s-string nil
"Last vip search string.")
(defvar vip-s-forward nil
"If t, search is forward.")
(defcustom vip-case-fold-search nil
"*If t, search ignores cases."
:type 'boolean
:group 'vip)
(defcustom vip-re-query-replace nil
"*If t then do regexp replace, if nil then do string replace."
:type 'boolean
:group 'vip)
(defcustom vip-open-with-indent nil
"*If t, indent when open a new line."
:type 'boolean
:group 'vip)
(defcustom vip-help-in-insert-mode nil
"*If t then C-h is bound to help-command in insert mode.
If nil then it is bound to `delete-backward-char'."
:type 'boolean
:group 'vip)
(defvar vip-quote-string "> "
"String inserted at the beginning of region.")
(defvar vip-tags-file-name "TAGS")
(defvar vip-inhibit-startup-message nil)
(defvar vip-startup-file (convert-standard-filename "~/.vip")
"Filename used as startup file for vip.")
;; key bindings
(defvar vip-mode-map (make-keymap))
(define-key vip-mode-map "\C-a" 'beginning-of-line)
(define-key vip-mode-map "\C-b" 'vip-scroll-back)
(define-key vip-mode-map "\C-c" 'vip-ctl-c)
(define-key vip-mode-map "\C-d" 'vip-scroll-up)
(define-key vip-mode-map "\C-e" 'vip-scroll-up-one)
(define-key vip-mode-map "\C-f" 'vip-scroll)
(define-key vip-mode-map "\C-g" 'vip-keyboard-quit)
(define-key vip-mode-map "\C-h" 'help-command)
(define-key vip-mode-map "\C-m" 'vip-scroll-back)
(define-key vip-mode-map "\C-n" 'vip-other-window)
(define-key vip-mode-map "\C-o" 'vip-open-line-at-point)
(define-key vip-mode-map "\C-u" 'vip-scroll-down)
(define-key vip-mode-map "\C-x" 'vip-ctl-x)
(define-key vip-mode-map "\C-y" 'vip-scroll-down-one)
(define-key vip-mode-map "\C-z" 'vip-change-mode-to-emacs)
(define-key vip-mode-map "\e" 'vip-ESC)
(define-key vip-mode-map " " 'vip-scroll)
(define-key vip-mode-map "!" 'vip-command-argument)
(define-key vip-mode-map "\"" 'vip-command-argument)
(define-key vip-mode-map "#" 'vip-command-argument)
(define-key vip-mode-map "$" 'vip-goto-eol)
(define-key vip-mode-map "%" 'vip-paren-match)
(define-key vip-mode-map "&" 'vip-nil)
(define-key vip-mode-map "'" 'vip-goto-mark-and-skip-white)
(define-key vip-mode-map "(" 'vip-backward-sentence)
(define-key vip-mode-map ")" 'vip-forward-sentence)
(define-key vip-mode-map "*" 'call-last-kbd-macro)
(define-key vip-mode-map "+" 'vip-next-line-at-bol)
(define-key vip-mode-map "," 'vip-repeat-find-opposite)
(define-key vip-mode-map "-" 'vip-previous-line-at-bol)
(define-key vip-mode-map "." 'vip-repeat)
(define-key vip-mode-map "/" 'vip-search-forward)
(define-key vip-mode-map "0" 'vip-beginning-of-line)
(define-key vip-mode-map "1" 'vip-digit-argument)
(define-key vip-mode-map "2" 'vip-digit-argument)
(define-key vip-mode-map "3" 'vip-digit-argument)
(define-key vip-mode-map "4" 'vip-digit-argument)
(define-key vip-mode-map "5" 'vip-digit-argument)
(define-key vip-mode-map "6" 'vip-digit-argument)
(define-key vip-mode-map "7" 'vip-digit-argument)
(define-key vip-mode-map "8" 'vip-digit-argument)
(define-key vip-mode-map "9" 'vip-digit-argument)
(define-key vip-mode-map ":" 'vip-ex)
(define-key vip-mode-map ";" 'vip-repeat-find)
(define-key vip-mode-map "<" 'vip-command-argument)
(define-key vip-mode-map "=" 'vip-command-argument)
(define-key vip-mode-map ">" 'vip-command-argument)
(define-key vip-mode-map "?" 'vip-search-backward)
(define-key vip-mode-map "@" 'vip-nil)
(define-key vip-mode-map "A" 'vip-Append)
(define-key vip-mode-map "B" 'vip-backward-Word)
(define-key vip-mode-map "C" 'vip-ctl-c-equivalent)
(define-key vip-mode-map "D" 'vip-kill-line)
(define-key vip-mode-map "E" 'vip-end-of-Word)
(define-key vip-mode-map "F" 'vip-find-char-backward)
(define-key vip-mode-map "G" 'vip-goto-line)
(define-key vip-mode-map "H" 'vip-window-top)
(define-key vip-mode-map "I" 'vip-Insert)
(define-key vip-mode-map "J" 'vip-join-lines)
(define-key vip-mode-map "K" 'vip-kill-buffer)
(define-key vip-mode-map "L" 'vip-window-bottom)
(define-key vip-mode-map "M" 'vip-window-middle)
(define-key vip-mode-map "N" 'vip-search-Next)
(define-key vip-mode-map "O" 'vip-Open-line)
(define-key vip-mode-map "P" 'vip-Put-back)
(define-key vip-mode-map "Q" 'vip-query-replace)
(define-key vip-mode-map "R" 'vip-replace-string)
(define-key vip-mode-map "S" 'vip-switch-to-buffer-other-window)
(define-key vip-mode-map "T" 'vip-goto-char-backward)
(define-key vip-mode-map "U" 'vip-nil)
(define-key vip-mode-map "V" 'vip-find-file-other-window)
(define-key vip-mode-map "W" 'vip-forward-Word)
(define-key vip-mode-map "X" 'vip-ctl-x-equivalent)
(define-key vip-mode-map "Y" 'vip-yank-line)
(define-key vip-mode-map "ZZ" 'save-buffers-kill-emacs)
(define-key vip-mode-map "[" 'vip-nil)
(define-key vip-mode-map "\\" 'vip-escape-to-emacs)
(define-key vip-mode-map "]" 'vip-nil)
(define-key vip-mode-map "^" 'vip-bol-and-skip-white)
(define-key vip-mode-map "_" 'vip-nil)
(define-key vip-mode-map "`" 'vip-goto-mark)
(define-key vip-mode-map "a" 'vip-append)
(define-key vip-mode-map "b" 'vip-backward-word)
(define-key vip-mode-map "c" 'vip-command-argument)
(define-key vip-mode-map "d" 'vip-command-argument)
(define-key vip-mode-map "e" 'vip-end-of-word)
(define-key vip-mode-map "f" 'vip-find-char-forward)
(define-key vip-mode-map "g" 'vip-info-on-file)
(define-key vip-mode-map "h" 'vip-backward-char)
(define-key vip-mode-map "i" 'vip-insert)
(define-key vip-mode-map "j" 'vip-next-line)
(define-key vip-mode-map "k" 'vip-previous-line)
(define-key vip-mode-map "l" 'vip-forward-char)
(define-key vip-mode-map "m" 'vip-mark-point)
(define-key vip-mode-map "n" 'vip-search-next)
(define-key vip-mode-map "o" 'vip-open-line)
(define-key vip-mode-map "p" 'vip-put-back)
(define-key vip-mode-map "q" 'vip-nil)
(define-key vip-mode-map "r" 'vip-replace-char)
(define-key vip-mode-map "s" 'vip-switch-to-buffer)
(define-key vip-mode-map "t" 'vip-goto-char-forward)
(define-key vip-mode-map "u" 'vip-undo)
(define-key vip-mode-map "v" 'vip-find-file)
(define-key vip-mode-map "w" 'vip-forward-word)
(define-key vip-mode-map "x" 'vip-delete-char)
(define-key vip-mode-map "y" 'vip-command-argument)
(define-key vip-mode-map "zH" 'vip-line-to-top)
(define-key vip-mode-map "zM" 'vip-line-to-middle)
(define-key vip-mode-map "zL" 'vip-line-to-bottom)
(define-key vip-mode-map "z\C-m" 'vip-line-to-top)
(define-key vip-mode-map "z." 'vip-line-to-middle)
(define-key vip-mode-map "z-" 'vip-line-to-bottom)
(define-key vip-mode-map "{" 'vip-backward-paragraph)
(define-key vip-mode-map "|" 'vip-goto-col)
(define-key vip-mode-map "}" 'vip-forward-paragraph)
(define-key vip-mode-map "~" 'vip-nil)
(define-key vip-mode-map "\177" 'vip-delete-backward-char)
(defun vip-version ()
(interactive)
(message "VIP version 3.5 of September 15, 1987"))
;; basic set up
;;;###autoload
(defun vip-setup ()
"Set up bindings for C-x 7 and C-z that are useful for VIP users."
(define-key ctl-x-map "7" 'vip-buffer-in-two-windows)
(global-set-key "\C-z" 'vip-change-mode-to-vi))
(defmacro vip-loop (count body)
"(COUNT BODY) Execute BODY COUNT times."
(list 'let (list (list 'count count))
(list 'while (list '> 'count 0)
body
(list 'setq 'count (list '1- 'count)))))
(defun vip-push-mark-silent (&optional location)
"Set mark at LOCATION (point, by default) and push old mark on mark ring.
No message."
(if (null (mark t))
nil
(setq mark-ring (cons (copy-marker (mark-marker)) mark-ring))
(if (> (length mark-ring) mark-ring-max)
(progn
(move-marker (car (nthcdr mark-ring-max mark-ring)) nil)
(setcdr (nthcdr (1- mark-ring-max) mark-ring) nil))))
(set-mark (or location (point))))
(defun vip-goto-col (arg)
"Go to ARG's column."
(interactive "P")
(let ((val (vip-p-val arg))
(com (vip-getcom arg)))
(save-excursion
(end-of-line)
(if (> val (1+ (current-column))) (error "")))
(if com (move-marker vip-com-point (point)))
(beginning-of-line)
(forward-char (1- val))
(if com (vip-execute-com 'vip-goto-col val com))))
(defun vip-copy-keymap (map)
(if (null map) (make-sparse-keymap) (copy-keymap map)))
;; changing mode
(defun vip-change-mode (new-mode)
"Change mode to NEW-MODE---either emacs-mode, vi-mode, or insert-mode."
(or (eq new-mode vip-current-mode)
(progn
(cond ((eq new-mode 'vi-mode)
(if (eq vip-current-mode 'insert-mode)
(progn
(vip-copy-region-as-kill (point) vip-insert-point)
(vip-repeat-insert-command))
(setq vip-emacs-local-map (current-local-map)
vip-emacs-mode-line-buffer-identification
mode-line-buffer-identification
vip-insert-local-map (vip-copy-keymap
(current-local-map))))
(vip-change-mode-line "Vi: ")
(use-local-map vip-mode-map))
((eq new-mode 'insert-mode)
(move-marker vip-insert-point (point))
(if (eq vip-current-mode 'emacs-mode)
(setq vip-emacs-local-map (current-local-map)
vip-emacs-mode-line-buffer-identification
mode-line-buffer-identification
vip-insert-local-map (vip-copy-keymap
(current-local-map)))
(setq vip-insert-local-map (vip-copy-keymap
vip-emacs-local-map)))
(vip-change-mode-line "Insert")
(use-local-map vip-insert-local-map)
(define-key vip-insert-local-map "\e" 'vip-change-mode-to-vi)
(define-key vip-insert-local-map "\C-z" 'vip-ESC)
(define-key vip-insert-local-map "\C-h"
(if vip-help-in-insert-mode 'help-command
'delete-backward-char))
(define-key vip-insert-local-map "\C-w"
'vip-delete-backward-word))
((eq new-mode 'emacs-mode)
(vip-change-mode-line "Emacs:")
(use-local-map vip-emacs-local-map)))
(setq vip-current-mode new-mode)
(force-mode-line-update))))
(defun vip-copy-region-as-kill (beg end)
"If BEG and END do not belong to the same buffer, it copies empty region."
(condition-case nil
(copy-region-as-kill beg end)
(error (copy-region-as-kill beg beg))))
(defun vip-change-mode-line (string)
"Assuming that the mode line format contains the string \"Emacs:\", this
function replaces the string by \"Vi: \" etc."
(setq mode-line-buffer-identification
(if (string= string "Emacs:")
vip-emacs-mode-line-buffer-identification
(list (concat string " %17b")))))
;;;###autoload
(defun vip-mode ()
"Turn on VIP emulation of VI."
(interactive)
(if (not vip-inhibit-startup-message)
(progn
(switch-to-buffer "VIP Startup Message")
(erase-buffer)
(insert
"VIP is a Vi emulation package for GNU Emacs. VIP provides most Vi commands
including Ex commands. VIP is however different from Vi in several points.
You can get more information on VIP by:
1. Typing `M-x info' and selecting menu item \"vip\".
2. Typing `C-h k' followed by a key whose description you want.
3. Printing VIP manual which can be found as GNU/man/vip.texinfo
4. Printing VIP Reference Card which can be found as GNU/etc/vipcard.tex
This startup message appears whenever you load VIP unless you type `y' now.
Type `n' to quit this window for now.\n")
(goto-char (point-min))
(if (y-or-n-p "Inhibit VIP startup message? ")
(progn
(with-current-buffer
(find-file-noselect
(substitute-in-file-name vip-startup-file))
(goto-char (point-max))
(insert "\n(setq vip-inhibit-startup-message t)\n")
(save-buffer)
(kill-buffer (current-buffer)))
(message "VIP startup message inhibited.")
(sit-for 2)))
(kill-buffer (current-buffer))
(message "")
(setq vip-inhibit-startup-message t)))
(vip-change-mode-to-vi))
(defun vip-change-mode-to-vi ()
"Change mode to vi mode."
(interactive)
(vip-change-mode 'vi-mode))
(defun vip-change-mode-to-insert ()
"Change mode to insert mode."
(interactive)
(vip-change-mode 'insert-mode))
(defun vip-change-mode-to-emacs ()
"Change mode to Emacs mode."
(interactive)
(vip-change-mode 'emacs-mode))
;; escape to emacs mode temporarily
(defun vip-escape-to-emacs (arg &optional events)
"Escape to Emacs mode for one Emacs command.
ARG is used as the prefix value for the executed command. If
EVENTS is a list of events, which become the beginning of the command."
(interactive "P")
(let (com key (old-map (current-local-map)))
(if events (setq unread-command-events events))
(setq prefix-arg arg)
(use-local-map vip-emacs-local-map)
(unwind-protect
(setq com (key-binding (setq key (read-key-sequence nil))))
(use-local-map old-map))
(command-execute com prefix-arg)
(setq prefix-arg nil) ;; reset prefix arg
))
(defun vip-message-conditions (conditions)
"Print CONDITIONS as a message."
(let ((case (car conditions)) (msg (cdr conditions)))
(if (null msg)
(message "%s" case)
(message "%s %s" case (prin1-to-string msg)))
(ding)))
(defun vip-ESC (arg)
"Emulate ESC key in Emacs mode."
(interactive "P")
(vip-escape-to-emacs arg '(?\e)))
(defun vip-ctl-c (arg)
"Emulate C-c key in Emacs mode."
(interactive "P")
(vip-escape-to-emacs arg '(?\C-c)))
(defun vip-ctl-x (arg)
"Emulate C-x key in Emacs mode."
(interactive "P")
(vip-escape-to-emacs arg '(?\C-x)))
(defun vip-ctl-h (arg)
"Emulate C-h key in Emacs mode."
(interactive "P")
(vip-escape-to-emacs arg '(?\C-h)))
;; prefix argument for vi mode
;; In vi mode, prefix argument is a dotted pair (NUM . COM) where NUM
;; represents the numeric value of the prefix argument and COM represents
;; command prefix such as "c", "d", "m" and "y".
(defun vip-prefix-arg-value (char value com)
"Compute numeric prefix arg value. Invoked by CHAR. VALUE is the value
obtained so far, and COM is the command part obtained so far."
(while (and (>= char ?0) (<= char ?9))
(setq value (+ (* (if (numberp value) value 0) 10) (- char ?0)))
(setq char (read-char)))
(setq prefix-arg value)
(if com (setq prefix-arg (cons prefix-arg com)))
(while (= char ?U)
(vip-describe-arg prefix-arg)
(setq char (read-char)))
(setq unread-command-events (list char)))
(defun vip-prefix-arg-com (char value com)
"Vi operator as prefix argument."
(let ((cont t))
(while (and cont
(or (= char ?c) (= char ?d) (= char ?y)
(= char ?!) (= char ?<) (= char ?>) (= char ?=)
(= char ?#) (= char ?r) (= char ?R) (= char ?\")))
(if com
;; this means that we already have a command character, so we
;; construct a com list and exit while. however, if char is "
;; it is an error.
(progn
;; new com is (CHAR . OLDCOM)
(if (or (= char ?#) (= char ?\")) (error ""))
(setq com (cons char com))
(setq cont nil))
;; if com is nil we set com as char, and read more. again, if char
;; is ", we read the name of register and store it in vip-use-register.
;; if char is !, =, or #, a complete com is formed so we exit while.
(cond ((or (= char ?!) (= char ?=))
(setq com char)
(setq char (read-char))
(setq cont nil))
((= char ?#)
;; read a char and encode it as com
(setq com (+ 128 (read-char)))
(setq char (read-char))
(setq cont nil))
((or (= char ?<) (= char ?>))
(setq com char)
(setq char (read-char))
(if (= com char) (setq com (cons char com)))
(setq cont nil))
((= char ?\")
(let ((reg (read-char)))
(if (or (and (<= ?A reg) (<= reg ?z))
(and (<= ?1 reg) (<= reg ?9)))
(setq vip-use-register reg)
(error ""))
(setq char (read-char))))
(t
(setq com char)
(setq char (read-char)))))))
(if (atom com)
;; com is a single char, so we construct prefix-arg
;; and if char is ?, describe prefix arg, otherwise exit by
;; pushing the char back
(progn
(setq prefix-arg (cons value com))
(while (= char ?U)
(vip-describe-arg prefix-arg)
(setq char (read-char)))
(setq unread-command-events (list char)))
;; as com is non-nil, this means that we have a command to execute
(if (or (= (car com) ?r) (= (car com) ?R))
;; execute appropriate region command.
(let ((char (car com)) (com (cdr com)))
(setq prefix-arg (cons value com))
(if (= char ?r) (vip-region prefix-arg)
(vip-Region prefix-arg))
;; reset prefix-arg
(setq prefix-arg nil))
;; otherwise, reset prefix arg and call appropriate command
(setq value (if (null value) 1 value))
(setq prefix-arg nil)
(cond ((equal com '(?c . ?c)) (vip-line (cons value ?C)))
((equal com '(?d . ?d)) (vip-line (cons value ?D)))
((equal com '(?d . ?y)) (vip-yank-defun))
((equal com '(?y . ?y)) (vip-line (cons value ?Y)))
((equal com '(?< . ?<)) (vip-line (cons value ?<)))
((equal com '(?> . ?>)) (vip-line (cons value ?>)))
((equal com '(?! . ?!)) (vip-line (cons value ?!)))
((equal com '(?= . ?=)) (vip-line (cons value ?=)))
(t (error ""))))))
(defun vip-describe-arg (arg)
(let (val com)
(setq val (vip-P-val arg)
com (vip-getcom arg))
(if (null val)
(if (null com)
(message "Value is nil, and command is nil.")
(message "Value is nil, and command is %c." com))
(if (null com)
(message "Value is %d, and command is nil." val)
(message "Value is %d, and command is %c." val com)))))
(defun vip-digit-argument (arg)
"Begin numeric argument for the next command."
(interactive "P")
(vip-prefix-arg-value last-command-event nil
(if (consp arg) (cdr arg) nil)))
(defun vip-command-argument (arg)
"Accept a motion command as an argument."
(interactive "P")
(condition-case conditions
(vip-prefix-arg-com
last-command-event
(cond ((null arg) nil)
((consp arg) (car arg))
((numberp arg) arg)
(t (error "strange arg")))
(cond ((null arg) nil)
((consp arg) (cdr arg))
((numberp arg) nil)
(t (error "strange arg"))))
(quit
(setq vip-use-register nil)
(signal 'quit nil))))
(defun vip-p-val (arg)
"Get value part of prefix-argument ARG."
(cond ((null arg) 1)
((consp arg) (if (null (car arg)) 1 (car arg)))
(t arg)))
(defun vip-P-val (arg)
"Get value part of prefix-argument ARG."
(cond ((consp arg) (car arg))
(t arg)))
(defun vip-getcom (arg)
"Get com part of prefix-argument ARG."
(cond ((null arg) nil)
((consp arg) (cdr arg))
(t nil)))
(defun vip-getCom (arg)
"Get com part of prefix-argument ARG and modify it."
(let ((com (vip-getcom arg)))
(cond ((equal com ?c) ?C)
((equal com ?d) ?D)
((equal com ?y) ?Y)
(t com))))
;; repeat last destructive command
(defun vip-append-to-register (reg start end)
"Append region to text in register REG.
START and END are buffer positions indicating what to append."
(set-register reg (concat (or (get-register reg) "")
(buffer-substring start end))))
(defun vip-execute-com (m-com val com)
"(M-COM VAL COM) Execute command COM. The list (M-COM VAL COM) is set
to vip-d-com for later use by vip-repeat"
(let ((reg vip-use-register))
(if com
(cond ((= com ?c) (vip-change vip-com-point (point)))
((= com (- ?c)) (vip-change-subr vip-com-point (point)))
((or (= com ?C) (= com (- ?C)))
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(if vip-use-register
(progn
(cond ((and (<= ?a vip-use-register)
(<= vip-use-register ?z))
(copy-to-register
vip-use-register (mark) (point) nil))
((and (<= ?A vip-use-register)
(<= vip-use-register ?Z))
(vip-append-to-register
(+ vip-use-register 32) (mark) (point)))
(t (setq vip-use-register nil)
(error "")))
(setq vip-use-register nil)))
(delete-region (mark) (point)))
(open-line 1)
(if (= com ?C) (vip-change-mode-to-insert) (yank)))
((= com ?d)
(if vip-use-register
(progn
(cond ((and (<= ?a vip-use-register)
(<= vip-use-register ?z))
(copy-to-register
vip-use-register vip-com-point (point) nil))
((and (<= ?A vip-use-register)
(<= vip-use-register ?Z))
(vip-append-to-register
(+ vip-use-register 32) vip-com-point (point)))
(t (setq vip-use-register nil)
(error "")))
(setq vip-use-register nil)))
(setq last-command
(if (eq last-command 'd-command) 'kill-region nil))
(kill-region vip-com-point (point))
(setq this-command 'd-command))
((= com ?D)
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(if vip-use-register
(progn
(cond ((and (<= ?a vip-use-register)
(<= vip-use-register ?z))
(copy-to-register
vip-use-register (mark) (point) nil))
((and (<= ?A vip-use-register)
(<= vip-use-register ?Z))
(vip-append-to-register
(+ vip-use-register 32) (mark) (point)))
(t (setq vip-use-register nil)
(error "")))
(setq vip-use-register nil)))
(setq last-command
(if (eq last-command 'D-command) 'kill-region nil))
(kill-region (mark) (point))
(if (eq m-com 'vip-line) (setq this-command 'D-command)))
(back-to-indentation))
((= com ?y)
(if vip-use-register
(progn
(cond ((and (<= ?a vip-use-register)
(<= vip-use-register ?z))
(copy-to-register
vip-use-register vip-com-point (point) nil))
((and (<= ?A vip-use-register)
(<= vip-use-register ?Z))
(vip-append-to-register
(+ vip-use-register 32) vip-com-point (point)))
(t (setq vip-use-register nil)
(error "")))
(setq vip-use-register nil)))
(setq last-command nil)
(copy-region-as-kill vip-com-point (point))
(goto-char vip-com-point))
((= com ?Y)
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(if vip-use-register
(progn
(cond ((and (<= ?a vip-use-register)
(<= vip-use-register ?z))
(copy-to-register
vip-use-register (mark) (point) nil))
((and (<= ?A vip-use-register)
(<= vip-use-register ?Z))
(vip-append-to-register
(+ vip-use-register 32) (mark) (point)))
(t (setq vip-use-register nil)
(error "")))
(setq vip-use-register nil)))
(setq last-command nil)
(copy-region-as-kill (mark) (point)))
(goto-char vip-com-point))
((or (= com ?!) (= com (- ?!)))
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(shell-command-on-region
(mark) (point)
(if (= com ?!)
(setq vip-last-shell-com (vip-read-string "!"))
vip-last-shell-com)
t)))
((= com ?=)
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(if (> (mark) (point)) (exchange-point-and-mark))
(indent-region (mark) (point) nil)))
((= com ?<)
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(indent-rigidly (mark) (point) (- vip-shift-width)))
(goto-char vip-com-point))
((= com ?>)
(save-excursion
(set-mark vip-com-point)
(vip-enlarge-region (mark) (point))
(indent-rigidly (mark) (point) vip-shift-width))
(goto-char vip-com-point))
((>= com 128)
;; this is special command #
(vip-special-prefix-com (- com 128)))))
(setq vip-d-com (list m-com val (if (or (= com ?c) (= com ?C) (= com ?!))
(- com) com)
reg))))
(defun vip-repeat (arg)
"(ARG) Re-execute last destructive command. vip-d-com has the form
\(COM ARG CH REG), where COM is the command to be re-executed, ARG is the
argument for COM, CH is a flag for repeat, and REG is optional and if exists
is the name of the register for COM."
(interactive "P")
(if (eq last-command 'vip-undo)
;; if the last command was vip-undo, then undo-more
(vip-undo-more)
;; otherwise execute the command stored in vip-d-com. if arg is non-nil
;; its prefix value is used as new prefix value for the command.
(let ((m-com (car vip-d-com))
(val (vip-P-val arg))
(com (car (cdr (cdr vip-d-com))))
(reg (nth 3 vip-d-com)))
(if (null val) (setq val (car (cdr vip-d-com))))
(if (null m-com) (error "No previous command to repeat"))
(setq vip-use-register reg)
(funcall m-com (cons val com)))))
(defun vip-special-prefix-com (char)
"This command is invoked interactively by the key sequence #<char>"
(cond ((= char ?c)
(downcase-region (min vip-com-point (point))
(max vip-com-point (point))))
((= char ?C)
(upcase-region (min vip-com-point (point))
(max vip-com-point (point))))
((= char ?g)
(set-mark vip-com-point)
(vip-global-execute))
((= char ?q)
(set-mark vip-com-point)
(vip-quote-region))
((= char ?s) (ispell-region vip-com-point (point)))))
;; undoing
(defun vip-undo ()
"Undo previous change."
(interactive)
(message "undo!")
(undo-start)
(undo-more 2)
(setq this-command 'vip-undo))
(defun vip-undo-more ()
"Continue undoing previous changes."
(message "undo more!")
(undo-more 1)
(setq this-command 'vip-undo))
;; utilities
(defun vip-string-tail (str)
(if (or (null str) (string= str "")) nil
(substring str 1)))
(defun vip-yank-defun ()
(mark-defun)
(copy-region-as-kill (point) (mark)))
(defun vip-enlarge-region (beg end)
"Enlarge region between BEG and END."
(if (< beg end)
(progn (goto-char beg) (set-mark end))
(goto-char end)
(set-mark beg))
(beginning-of-line)
(exchange-point-and-mark)
(if (or (not (eobp)) (not (bolp))) (with-no-warnings (next-line 1)))
(beginning-of-line)
(if (> beg end) (exchange-point-and-mark)))
(defun vip-global-execute ()
"Call last keyboad macro for each line in the region."
(if (> (point) (mark)) (exchange-point-and-mark))
(beginning-of-line)
(call-last-kbd-macro)
(while (< (point) (mark))
(forward-line 1)
(beginning-of-line)
(call-last-kbd-macro)))
(defun vip-quote-region ()
"Quote region by inserting the user supplied string at the beginning of
each line in the region."
(setq vip-quote-string
(let ((str
(vip-read-string (format "quote string (default %s): "
vip-quote-string))))
(if (string= str "") vip-quote-string str)))
(vip-enlarge-region (point) (mark))
(if (> (point) (mark)) (exchange-point-and-mark))
(insert vip-quote-string)
(beginning-of-line)
(forward-line 1)
(while (and (< (point) (mark)) (bolp))
(insert vip-quote-string)
(beginning-of-line)
(forward-line 1)))
(defun vip-end-with-a-newline-p (string)
"Check if the string ends with a newline."
(or (string= string "")
(= (aref string (1- (length string))) ?\n)))
(defvar vip-save-minibuffer-local-map)
(defun vip-read-string (prompt &optional init)
(setq vip-save-minibuffer-local-map (copy-keymap minibuffer-local-map))
(define-key minibuffer-local-map "\C-h" 'backward-char)
(define-key minibuffer-local-map "\C-w" 'backward-word)
(define-key minibuffer-local-map "\e" 'exit-minibuffer)
(let (str)
(condition-case conditions
(setq str (read-string prompt init))
(quit
(setq minibuffer-local-map vip-save-minibuffer-local-map)
(signal 'quit nil)))
(setq minibuffer-local-map vip-save-minibuffer-local-map)
str))
;; insertion commands
(defun vip-repeat-insert-command ()
"This function is called when mode changes from insertion mode to
vi command mode. It will repeat the insertion command if original insertion
command was invoked with argument > 1."
(let ((i-com (car vip-d-com)) (val (car (cdr vip-d-com))))
(if (and val (> val 1)) ;; first check that val is non-nil
(progn
(setq vip-d-com (list i-com (1- val) ?r))
(vip-repeat nil)
(setq vip-d-com (list i-com val ?r))))))
(defun vip-insert (arg) ""
(interactive "P")
(let ((val (vip-p-val arg)) (com (vip-getcom arg)))
(setq vip-d-com (list 'vip-insert val ?r))
(if com (vip-loop val (yank))
(vip-change-mode-to-insert))))
(defun vip-append (arg)
"Append after point."
(interactive "P")
(let ((val (vip-p-val arg)) (com (vip-getcom arg)))
(setq vip-d-com (list 'vip-append val ?r))
(if (not (eolp)) (forward-char))
(if (equal com ?r)
(vip-loop val (yank))
(vip-change-mode-to-insert))))
(defun vip-Append (arg)
"Append at end of line."
(interactive "P")
(let ((val (vip-p-val arg)) (com (vip-getcom arg)))
(setq vip-d-com (list 'vip-Append val ?r))
(end-of-line)
(if (equal com ?r)
(vip-loop val (yank))
(vip-change-mode-to-insert))))
(defun vip-Insert (arg)
"Insert before first non-white."
(interactive "P")
(let ((val (vip-p-val arg)) (com (vip-getcom arg)))
(setq vip-d-com (list 'vip-Insert val ?r))
(back-to-indentation)
(if (equal com ?r)
(vip-loop val (yank))
(vip-change-mode-to-insert))))
(defun vip-open-line (arg)
"Open line below."
(interactive "P")
(let ((val (vip-p-val arg)) (com (vip-getcom arg)))
(setq vip-d-com (list 'vip-open-line val ?r))
(let ((col (current-indentation)))
(if (equal com ?r)
(vip-loop val
(progn
(end-of-line)
(newline 1)
(if vip-open-with-indent (indent-to col))
(yank)))
(end-of-line)
(newline 1)
(if vip-open-with-indent (indent-to col))
(vip-change-mode-to-insert)))))
(defun vip-Open-line (arg)
"Open line above."
(interactive "P")
(let ((val (vip-p-val arg)) (com (vip-getcom arg)))
(setq vip-d-com (list 'vip-Open-line val ?r))