--- /dev/null
+;;; viper-ex.el -- functions implementing the Ex commands for Viper
+
+;; 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.
+
+
+(require 'viper-util)
+
+;;; Variables
+
+(defconst vip-ex-work-buf-name " *ex-working-space*")
+(defconst vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
+
+
+;;; Completion in :set command
+
+;; The list of Ex commands. Used for completing command names.
+(defconst ex-token-alist
+ '(("!") ("=") (">") ("&") ("~")
+ ("yank") ("xit") ("WWrite") ("Write") ("write") ("wq") ("visual")
+ ("version") ("vglobal") ("unmap") ("undo") ("tag") ("transfer") ("suspend")
+ ("substitute") ("submitReport") ("stop") ("sr") ("source") ("shell")
+ ("set") ("rewind") ("recover") ("read") ("quit") ("pwd")
+ ("put") ("preserve") ("PreviousRelatedFile") ("RelatedFile")
+ ("next") ("Next") ("move") ("mark") ("map") ("kmark") ("join")
+ ("help") ("goto") ("global") ("file") ("edit") ("delete") ("copy")
+ ("chdir") ("cd") ("Buffer") ("buffer") ("args")) )
+
+;; A-list of Ex variables that can be set using the :set command.
+(defconst ex-variable-alist
+ '(("wrapscan") ("ws") ("wrapmargin") ("wm")
+ ("tab-stop-local") ("tsl") ("tabstop") ("ts")
+ ("showmatch") ("sm") ("shiftwidth") ("sw") ("shell") ("sh")
+ ("readonly") ("ro")
+ ("nowrapscan") ("nows") ("noshowmatch") ("nosm")
+ ("noreadonly") ("noro") ("nomagic") ("noma")
+ ("noignorecase") ("noic") ("noautoindent") ("noai")
+ ("magic") ("ma") ("ignorecase") ("ic") ("autoindent") ("ai")
+ ))
+
+
+
+;; Token recognized during parsing of Ex commands (e.g., "read", "comma")
+(defvar ex-token nil)
+
+;; Type of token.
+;; If non-nil, gives type of address; if nil, it is a command.
+(defvar ex-token-type nil)
+
+;; List of addresses passed to Ex command
+(defvar ex-addresses nil)
+
+;; It seems that this flag is used only for `#', `print', and `list', which
+;; aren't implemented. Check later.
+(defvar ex-flag nil)
+
+;; "buffer" where Ex commands keep deleted data.
+;; In Emacs terms, this is a register.
+(defvar ex-buffer nil)
+
+;; Value of ex count.
+(defvar ex-count nil)
+
+;; Flag for global command.
+(defvar ex-g-flag nil)
+
+;; If t, global command is executed on lines not matching ex-g-pat.
+(defvar ex-g-variant nil)
+
+;; Save reg-exp used in substitute.
+(defvar ex-reg-exp nil)
+
+
+;; Replace pattern for substitute.
+(defvar ex-repl nil)
+
+;; Pattern for global command.
+(defvar ex-g-pat nil)
+
+;; `sh' doesn't seem to expand wildcards, like `*'
+(defconst ex-find-file-shell "csh"
+ "Shell in which to interpret wildcards.")
+(defvar ex-find-file-shell-options "-f"
+ "*Options to pass to `ex-find-file-shell'.")
+
+;; Remembers the previous Ex tag.
+(defvar ex-tag nil)
+
+;; file used by Ex commands like :r, :w, :n
+(defvar ex-file nil)
+
+;; If t, tells Ex that this is a variant-command, i.e., w>>, r!, etc.
+(defvar ex-variant nil)
+
+;; Specified the offset of an Ex command, such as :read.
+(defvar ex-offset nil)
+
+;; Tells Ex that this is a w>> command.
+(defvar ex-append nil)
+
+;; File containing the shell command to be executed at Ex prompt,
+;; e.g., :r !date
+(defvar ex-cmdfile nil)
+
+;; flag used in vip-ex-read-file-name to indicate that we may be reading
+;; multiple file names. Used for :edit and :next
+(defvar vip-keep-reading-filename nil)
+
+(defconst ex-cycle-other-window t
+ "*If t, :n and :b cycles through files and buffers in other window.
+Then :N and :B cycles in the current window. If nil, this behavior is
+reversed.")
+
+(defconst ex-cycle-through-non-files nil
+ "*Cycle through *scratch* and other buffers that don't visit any file.")
+
+;; Last shell command executed with :! command.
+(defvar vip-ex-last-shell-com nil)
+
+;; Indicates if Minibuffer was exited temporarily in Ex-command.
+(defvar vip-incomplete-ex-cmd nil)
+
+;; Remembers the last ex-command prompt.
+(defvar vip-last-ex-prompt "")
+
+
+;;; Code
+
+(defun vip-check-sub (str)
+ "Check if ex-token is an initial segment of STR."
+ (let ((length (length ex-token)))
+ (if (and (<= length (length str))
+ (string= ex-token (substring str 0 length)))
+ (setq ex-token str)
+ (setq ex-token-type 'non-command))))
+
+(defun vip-get-ex-com-subr ()
+ "Get a complete ex command."
+ (let (case-fold-search)
+ (set-mark (point))
+ (re-search-forward "[a-zA-Z][a-zA-Z]*")
+ (setq ex-token-type 'command)
+ (setq ex-token (buffer-substring (point) (mark t)))
+ (exchange-point-and-mark)
+ (cond ((looking-at "a")
+ (cond ((looking-at "ab") (vip-check-sub "abbreviate"))
+ ((looking-at "ar") (vip-check-sub "args"))
+ (t (vip-check-sub "append"))))
+ ((looking-at "h") (vip-check-sub "help"))
+ ((looking-at "c")
+ (cond ((looking-at "cd") (vip-check-sub "cd"))
+ ((looking-at "ch") (vip-check-sub "chdir"))
+ ((looking-at "co") (vip-check-sub "copy"))
+ (t (vip-check-sub "change"))))
+ ((looking-at "d") (vip-check-sub "delete"))
+ ((looking-at "b") (vip-check-sub "buffer"))
+ ((looking-at "B") (vip-check-sub "Buffer"))
+ ((looking-at "e")
+ (if (looking-at "ex") (vip-check-sub "ex")
+ (vip-check-sub "edit")))
+ ((looking-at "f") (vip-check-sub "file"))
+ ((looking-at "g") (vip-check-sub "global"))
+ ((looking-at "i") (vip-check-sub "insert"))
+ ((looking-at "j") (vip-check-sub "join"))
+ ((looking-at "l") (vip-check-sub "list"))
+ ((looking-at "m")
+ (cond ((looking-at "map") (vip-check-sub "map"))
+ ((looking-at "mar") (vip-check-sub "mark"))
+ (t (vip-check-sub "move"))))
+ ((looking-at "k[a-z][^a-z]")
+ (setq ex-token "kmark")
+ (forward-char 1)
+ (exchange-point-and-mark)) ;; this is canceled out by another
+ ;; exchange-point-and-mark at the end
+ ((looking-at "k") (vip-check-sub "kmark"))
+ ((looking-at "n") (if (looking-at "nu")
+ (vip-check-sub "number")
+ (vip-check-sub "next")))
+ ((looking-at "N") (vip-check-sub "Next"))
+ ((looking-at "o") (vip-check-sub "open"))
+ ((looking-at "p")
+ (cond ((looking-at "pre") (vip-check-sub "preserve"))
+ ((looking-at "pu") (vip-check-sub "put"))
+ ((looking-at "pw") (vip-check-sub "pwd"))
+ (t (vip-check-sub "print"))))
+ ((looking-at "P") (vip-check-sub "PreviousRelatedFile"))
+ ((looking-at "R") (vip-check-sub "RelatedFile"))
+ ((looking-at "q") (vip-check-sub "quit"))
+ ((looking-at "r")
+ (cond ((looking-at "rec") (vip-check-sub "recover"))
+ ((looking-at "rew") (vip-check-sub "rewind"))
+ (t (vip-check-sub "read"))))
+ ((looking-at "s")
+ (cond ((looking-at "se") (vip-check-sub "set"))
+ ((looking-at "sh") (vip-check-sub "shell"))
+ ((looking-at "so") (vip-check-sub "source"))
+ ((looking-at "sr") (vip-check-sub "sr"))
+ ((looking-at "st") (vip-check-sub "stop"))
+ ((looking-at "sus") (vip-check-sub "suspend"))
+ ((looking-at "subm") (vip-check-sub "submitReport"))
+ (t (vip-check-sub "substitute"))))
+ ((looking-at "t")
+ (if (looking-at "ta") (vip-check-sub "tag")
+ (vip-check-sub "transfer")))
+ ((looking-at "u")
+ (cond ((looking-at "una") (vip-check-sub "unabbreviate"))
+ ((looking-at "unm") (vip-check-sub "unmap"))
+ (t (vip-check-sub "undo"))))
+ ((looking-at "v")
+ (cond ((looking-at "ve") (vip-check-sub "version"))
+ ((looking-at "vi") (vip-check-sub "visual"))
+ (t (vip-check-sub "vglobal"))))
+ ((looking-at "w")
+ (if (looking-at "wq") (vip-check-sub "wq")
+ (vip-check-sub "write")))
+ ((looking-at "W")
+ (if (looking-at "WW")
+ (vip-check-sub "WWrite")
+ (vip-check-sub "Write")))
+ ((looking-at "x") (vip-check-sub "xit"))
+ ((looking-at "y") (vip-check-sub "yank"))
+ ((looking-at "z") (vip-check-sub "z")))
+ (exchange-point-and-mark)
+ ))
+
+(defun vip-get-ex-token ()
+ "Get an ex-token which is either an address or a command.
+A token has a type, \(command, address, end-mark\), and a value."
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t|")
+ (cond ((looking-at "#")
+ (setq ex-token-type 'command)
+ (setq ex-token (char-to-string (following-char)))
+ (forward-char 1))
+ ((looking-at "[a-z]") (vip-get-ex-com-subr))
+ ((looking-at "\\.")
+ (forward-char 1)
+ (setq ex-token-type 'dot))
+ ((looking-at "[0-9]")
+ (set-mark (point))
+ (re-search-forward "[0-9]*")
+ (setq ex-token-type
+ (cond ((eq ex-token-type 'plus) 'add-number)
+ ((eq ex-token-type 'minus) 'sub-number)
+ (t 'abs-number)))
+ (setq ex-token (string-to-int (buffer-substring (point) (mark t)))))
+ ((looking-at "\\$")
+ (forward-char 1)
+ (setq ex-token-type 'end))
+ ((looking-at "%")
+ (forward-char 1)
+ (setq ex-token-type 'whole))
+ ((looking-at "+")
+ (cond ((or (looking-at "+[-+]") (looking-at "+[\n|]"))
+ (forward-char 1)
+ (insert "1")
+ (backward-char 1)
+ (setq ex-token-type 'plus))
+ ((looking-at "+[0-9]")
+ (forward-char 1)
+ (setq ex-token-type 'plus))
+ (t
+ (error vip-BadAddress))))
+ ((looking-at "-")
+ (cond ((or (looking-at "-[-+]") (looking-at "-[\n|]"))
+ (forward-char 1)
+ (insert "1")
+ (backward-char 1)
+ (setq ex-token-type 'minus))
+ ((looking-at "-[0-9]")
+ (forward-char 1)
+ (setq ex-token-type 'minus))
+ (t
+ (error vip-BadAddress))))
+ ((looking-at "/")
+ (forward-char 1)
+ (set-mark (point))
+ (let ((cont t))
+ (while (and (not (eolp)) cont)
+ ;;(re-search-forward "[^/]*/")
+ (re-search-forward "[^/]*\\(/\\|\n\\)")
+ (if (not (vip-looking-back "[^\\\\]\\(\\\\\\\\\\)*\\\\/"))
+ (setq cont nil))))
+ (backward-char 1)
+ (setq ex-token (buffer-substring (point) (mark t)))
+ (if (looking-at "/") (forward-char 1))
+ (setq ex-token-type 'search-forward))
+ ((looking-at "\\?")
+ (forward-char 1)
+ (set-mark (point))
+ (let ((cont t))
+ (while (and (not (eolp)) cont)
+ ;;(re-search-forward "[^\\?]*\\?")
+ (re-search-forward "[^\\?]*\\(\\?\\|\n\\)")
+ (if (not (vip-looking-back "[^\\\\]\\(\\\\\\\\\\)*\\\\\\?"))
+ (setq cont nil))
+ (backward-char 1)
+ (if (not (looking-at "\n")) (forward-char 1))))
+ (setq ex-token-type 'search-backward)
+ (setq ex-token (buffer-substring (1- (point)) (mark t))))
+ ((looking-at ",")
+ (forward-char 1)
+ (setq ex-token-type 'comma))
+ ((looking-at ";")
+ (forward-char 1)
+ (setq ex-token-type 'semi-colon))
+ ((looking-at "[!=><&~]")
+ (setq ex-token-type 'command)
+ (setq ex-token (char-to-string (following-char)))
+ (forward-char 1))
+ ((looking-at "'")
+ (setq ex-token-type 'goto-mark)
+ (forward-char 1)
+ (cond ((looking-at "'") (setq ex-token nil))
+ ((looking-at "[a-z]") (setq ex-token (following-char)))
+ (t (error "Marks are ' and a-z")))
+ (forward-char 1))
+ ((looking-at "\n")
+ (setq ex-token-type 'end-mark)
+ (setq ex-token "goto"))
+ (t
+ (error vip-BadExCommand)))))
+
+;; Reads Ex command. Tries to determine if it has to exit because command
+;; is complete or invalid. If not, keeps reading command.
+(defun ex-cmd-read-exit ()
+ (interactive)
+ (setq vip-incomplete-ex-cmd t)
+ (let ((quit-regex1 (concat
+ "\\("
+ "set[ \t]*" "\\|" "edit[ \t]*" "\\|" "[nN]ext[ \t]*"
+ "\\|" "unm[ \t]*" "\\|" "^[ \t]*rep"
+ "\\)"))
+ (quit-regex2 (concat
+ "[a-zA-Z][ \t]*"
+ "\\(" "!" "\\|" ">>"
+ "\\|" "\\+[0-9]+"
+ "\\)"
+ "*[ \t]*$"))
+ (stay-regex (concat
+ "\\("
+ "^[ \t]*$" "\\|" "[ktgjmsz][ \t]*$" "\\|" "^[ \t]*ab.*"
+ "\\|" "tr[ansfer \t]*" "\\|" "sr[ \t]*"
+ "\\|" "mo.*" "\\|" "^[ \t]*k?ma[^p]*"
+ "\\|" "^[ \t]*fi.*" "\\|" "v?gl.*" "\\|" "[vg][ \t]*$"
+ "\\|" "jo.*" "\\|" "^[ \t]*ta.*" "\\|" "^[ \t]*una.*"
+ "\\|" "^[ \t]*su.*" "\\|['`][a-z][ \t]*"
+ "\\|" "![ \t]*[a-zA-Z].*"
+ "\\)"
+ "!*")))
+
+ (save-window-excursion ;; put cursor at the end of the Ex working buffer
+ (set-buffer vip-ex-work-buf)
+ (goto-char (point-max)))
+ (cond ((vip-looking-back quit-regex1) (exit-minibuffer))
+ ((vip-looking-back stay-regex) (insert " "))
+ ((vip-looking-back quit-regex2) (exit-minibuffer))
+ (t (insert " ")))))
+
+;; complete Ex command
+(defun ex-cmd-complete ()
+ (interactive)
+ (let (save-pos dist compl-list string-to-complete completion-result)
+
+ (save-excursion
+ (setq dist (skip-chars-backward "[a-zA-Z!=>&~]")
+ save-pos (point)))
+
+ (if (or (= dist 0)
+ (vip-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
+ (vip-looking-back
+ "^[ \t]*[a-zA-Z!=>&~][ \t]*[/?]*+[ \t]+[a-zA-Z!=>&~]+"))
+ ;; Preceding characters are not the ones allowed in an Ex command
+ ;; or we have typed past command name.
+ ;; Note: we didn't do parsing, so there may be surprises.
+ (if (or (vip-looking-back "[a-zA-Z!=>&~][ \t]*[/?]*[ \t]*")
+ (vip-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
+ (looking-at "[^ \t\n\C-m]"))
+ nil
+ (with-output-to-temp-buffer "*Completions*"
+ (display-completion-list
+ (vip-alist-to-list ex-token-alist))))
+ ;; Preceding chars may be part of a command name
+ (setq string-to-complete (buffer-substring save-pos (point)))
+ (setq completion-result
+ (try-completion string-to-complete ex-token-alist))
+
+ (cond ((eq completion-result t) ;; exact match--do nothing
+ (vip-tmp-insert-at-eob " (Sole completion)"))
+ ((eq completion-result nil)
+ (vip-tmp-insert-at-eob " (No match)"))
+ (t ;; partial completion
+ (goto-char save-pos)
+ (delete-region (point) (point-max))
+ (insert completion-result)
+ (let (case-fold-search)
+ (setq compl-list
+ (vip-filter-alist (concat "^" completion-result)
+ ex-token-alist)))
+ (if (> (length compl-list) 1)
+ (with-output-to-temp-buffer "*Completions*"
+ (display-completion-list
+ (vip-alist-to-list (reverse compl-list)))))))
+ )))
+
+(defun vip-ex (&optional string)
+ "Ex commands within Viper."
+ (interactive)
+ (or string
+ (setq ex-g-flag nil
+ ex-g-variant nil))
+ (let* ((map (copy-keymap minibuffer-local-map))
+ (address nil)
+ (cont t)
+ (dot (point))
+ com-str)
+
+ (vip-add-keymap vip-ex-cmd-map map)
+
+ (setq com-str (or string (vip-read-string-with-history
+ ":"
+ nil
+ 'vip-ex-history
+ (car vip-ex-history)
+ map)))
+ (save-window-excursion
+ ;; just a precaution
+ (or (vip-buffer-live-p vip-ex-work-buf)
+ (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name)))
+ (set-buffer vip-ex-work-buf)
+ (delete-region (point-min) (point-max))
+ (insert com-str "\n")
+ (goto-char (point-min)))
+ (setq ex-token-type nil
+ ex-addresses nil)
+ (while cont
+ (vip-get-ex-token)
+ (cond ((memq ex-token-type '(command end-mark))
+ (if address (setq ex-addresses (cons address ex-addresses)))
+ (cond ((string= ex-token "global")
+ (ex-global nil)
+ (setq cont nil))
+ ((string= ex-token "vglobal")
+ (ex-global t)
+ (setq cont nil))
+ (t
+ (vip-execute-ex-command)
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (cond ((looking-at "|")
+ (forward-char 1))
+ ((looking-at "\n")
+ (setq cont nil))
+ (t (error "`%s': %s" ex-token vip-SpuriousText)))
+ ))
+ ))
+ ((eq ex-token-type 'non-command)
+ (error (format "`%s': %s" ex-token vip-BadExCommand)))
+ ((eq ex-token-type 'whole)
+ (setq ex-addresses
+ (cons (point-max) (cons (point-min) ex-addresses))))
+ ((eq ex-token-type 'comma)
+ (setq ex-addresses
+ (cons (if (null address) (point) address) ex-addresses)))
+ ((eq ex-token-type 'semi-colon)
+ (if address (setq dot address))
+ (setq ex-addresses
+ (cons (if (null address) (point) address) ex-addresses)))
+ (t (let ((ans (vip-get-ex-address-subr address dot)))
+ (if ans (setq address ans))))))))
+
+(defun vip-get-ex-pat ()
+ "Get a regular expression and set `ex-variant', if found."
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (if (looking-at "!")
+ (progn
+ (setq ex-g-variant (not ex-g-variant)
+ ex-g-flag (not ex-g-flag))
+ (forward-char 1)
+ (skip-chars-forward " \t")))
+ (let ((c (following-char)))
+ (if (string-match "[0-9A-Za-z]" (format "%c" c))
+ (error
+ "Global regexp must be inside matching non-alphanumeric chars"))
+ (if (looking-at "[^\\\\\n]")
+ (progn
+ (forward-char 1)
+ (set-mark (point))
+ (let ((cont t))
+ (while (and (not (eolp)) cont)
+ (if (not (re-search-forward (format "[^%c]*%c" c c) nil t))
+ (if (member ex-token '("global" "vglobal"))
+ (error
+ "Missing closing delimiter for global regexp")
+ (goto-char (point-max))))
+ (if (not (vip-looking-back
+ (format "[^\\\\]\\(\\\\\\\\\\)*\\\\%c" c)))
+ (setq cont nil))))
+ (setq ex-token
+ (if (= (mark t) (point)) ""
+ (buffer-substring (1- (point)) (mark t))))
+ (backward-char 1))
+ (setq ex-token nil))
+ c)))
+
+(defun vip-get-ex-command ()
+ "get an ex command"
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (if (looking-at "/") (forward-char 1))
+ (skip-chars-forward " \t")
+ (cond ((looking-at "[a-z]")
+ (vip-get-ex-com-subr)
+ (if (eq ex-token-type 'non-command)
+ (error "`%s': %s" ex-token vip-BadExCommand)))
+ ((looking-at "[!=><&~]")
+ (setq ex-token (char-to-string (following-char)))
+ (forward-char 1))
+ (t (error vip-BadExCommand)))))
+
+(defun vip-get-ex-opt-gc (c)
+ "Get an Ex option g or c."
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (if (looking-at (format "%c" c)) (forward-char 1))
+ (skip-chars-forward " \t")
+ (cond ((looking-at "g")
+ (setq ex-token "g")
+ (forward-char 1)
+ t)
+ ((looking-at "c")
+ (setq ex-token "c")
+ (forward-char 1)
+ t)
+ (t nil))))
+
+(defun vip-default-ex-addresses (&optional whole-flag)
+ "Compute default addresses. WHOLE-FLAG means use the whole buffer."
+ (cond ((null ex-addresses)
+ (setq ex-addresses
+ (if whole-flag
+ (cons (point-max) (cons (point-min) nil))
+ (cons (point) (cons (point) nil)))))
+ ((null (cdr ex-addresses))
+ (setq ex-addresses
+ (cons (car ex-addresses) ex-addresses)))))
+
+(defun vip-get-ex-address ()
+ "Get an ex-address as a marker and set ex-flag if a flag is found."
+ (let ((address (point-marker)) (cont t))
+ (setq ex-token "")
+ (setq ex-flag nil)
+ (while cont
+ (vip-get-ex-token)
+ (cond ((eq ex-token-type 'command)
+ (if (member ex-token '("print" "list" "#"))
+ (progn
+ (setq ex-flag t
+ cont nil))
+ (error "Address expected in this Ex command")))
+ ((eq ex-token-type 'end-mark)
+ (setq cont nil))
+ ((eq ex-token-type 'whole)
+ (error "Trailing address expected"))
+ ((eq ex-token-type 'comma)
+ (error "`%s': %s" ex-token vip-SpuriousText))
+ (t (let ((ans (vip-get-ex-address-subr address (point-marker))))
+ (if ans (setq address ans))))))
+ address))
+
+(defun vip-get-ex-address-subr (old-address dot)
+ "Returns an address as a point."
+ (let ((address nil))
+ (if (null old-address) (setq old-address dot))
+ (cond ((eq ex-token-type 'dot)
+ (setq address dot))
+ ((eq ex-token-type 'add-number)
+ (save-excursion
+ (goto-char old-address)
+ (forward-line (if (= old-address 0) (1- ex-token) ex-token))
+ (setq address (point-marker))))
+ ((eq ex-token-type 'sub-number)
+ (save-excursion
+ (goto-char old-address)
+ (forward-line (- ex-token))
+ (setq address (point-marker))))
+ ((eq ex-token-type 'abs-number)
+ (save-excursion
+ (goto-char (point-min))
+ (if (= ex-token 0) (setq address 0)
+ (forward-line (1- ex-token))
+ (setq address (point-marker)))))
+ ((eq ex-token-type 'end)
+ (setq address (point-max-marker)))
+ ((eq ex-token-type 'plus) t);; do nothing
+ ((eq ex-token-type 'minus) t);; do nothing
+ ((eq ex-token-type 'search-forward)
+ (save-excursion
+ (ex-search-address t)
+ (setq address (point-marker))))
+ ((eq ex-token-type 'search-backward)
+ (save-excursion
+ (ex-search-address nil)
+ (setq address (point-marker))))
+ ((eq ex-token-type 'goto-mark)
+ (save-excursion
+ (if (null ex-token)
+ (exchange-point-and-mark)
+ (goto-char (vip-register-to-point
+ (1+ (- ex-token ?a)) 'enforce-buffer)))
+ (setq address (point-marker)))))
+ address))
+
+
+(defun ex-search-address (forward)
+ "Search pattern and set address."
+ (if (string= ex-token "")
+ (if (null vip-s-string)
+ (error vip-NoPrevSearch)
+ (setq ex-token vip-s-string))
+ (setq vip-s-string ex-token))
+ (if forward
+ (progn
+ (forward-line 1)
+ (re-search-forward ex-token))
+ (forward-line -1)
+ (re-search-backward ex-token)))
+
+(defun vip-get-ex-buffer ()
+ "Get a buffer name and set `ex-count' and `ex-flag' if found."
+ (setq ex-buffer nil)
+ (setq ex-count nil)
+ (setq ex-flag nil)
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (if (looking-at "[a-zA-Z]")
+ (progn
+ (setq ex-buffer (following-char))
+ (forward-char 1)
+ (skip-chars-forward " \t")))
+ (if (looking-at "[0-9]")
+ (progn
+ (set-mark (point))
+ (re-search-forward "[0-9][0-9]*")
+ (setq ex-count (string-to-int (buffer-substring (point) (mark t))))
+ (skip-chars-forward " \t")))
+ (if (looking-at "[pl#]")
+ (progn
+ (setq ex-flag t)
+ (forward-char 1)))
+ (if (not (looking-at "[\n|]"))
+ (error "`%s': %s" ex-token vip-SpuriousText))))
+
+(defun vip-get-ex-count ()
+ (setq ex-variant nil
+ ex-count nil
+ ex-flag nil)
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (if (looking-at "!")
+ (progn
+ (setq ex-variant t)
+ (forward-char 1)))
+ (skip-chars-forward " \t")
+ (if (looking-at "[0-9]")
+ (progn
+ (set-mark (point))
+ (re-search-forward "[0-9][0-9]*")
+ (setq ex-count (string-to-int (buffer-substring (point) (mark t))))
+ (skip-chars-forward " \t")))
+ (if (looking-at "[pl#]")
+ (progn
+ (setq ex-flag t)
+ (forward-char 1)))
+ (if (not (looking-at "[\n|]"))
+ (error "`%s': %s"
+ (buffer-substring (point-min) (1- (point-max))) vip-BadExCommand))))
+
+(defun ex-expand-filsyms (cmd buf)
+ "Expand \% and \# in ex command."
+ (let (cf pf ret)
+ (save-excursion
+ (set-buffer buf)
+ (setq cf buffer-file-name)
+ (setq pf (ex-next nil t))) ;; this finds alternative file name
+ (if (and (null cf) (string-match "[^\\]%\\|\\`%" cmd))
+ (error "No current file to substitute for `\%'"))
+ (if (and (null pf) (string-match "[^\\]#\\|\\`#" cmd))
+ (error "No alternate file to substitute for `#'"))
+ (save-excursion
+ (set-buffer (get-buffer-create " ex-tmp"))
+ (insert cmd)
+ (goto-char (point-min))
+ (while (re-search-forward "%\\|#" nil t)
+ (let ((data (match-data))
+ (char (buffer-substring (match-beginning 0) (match-end 0))))
+ (if (vip-looking-back (concat "\\\\" char))
+ (replace-match char)
+ (store-match-data data)
+ (if (string= char "%")
+ (replace-match cf)
+ (replace-match pf)))))
+ (end-of-line)
+ (setq ret (buffer-substring (point-min) (point)))
+ (kill-buffer (current-buffer))
+ (message "%s" ret))
+ ret))
+
+(defun vip-get-ex-file ()
+ "Get a file name and set ex-variant, `ex-append' and `ex-offset' if found."
+ (let (prompt)
+ (setq ex-file nil
+ ex-variant nil
+ ex-append nil
+ ex-offset nil
+ ex-cmdfile nil)
+ (save-excursion
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (if (looking-at "!")
+ (if (not (vip-looking-back "[ \t]"))
+ (progn
+ (setq ex-variant t)
+ (forward-char 1)
+ (skip-chars-forward " \t"))
+ (setq ex-cmdfile t)
+ (forward-char 1)
+ (skip-chars-forward " \t")))
+ (if (looking-at ">>")
+ (progn
+ (setq ex-append t
+ ex-variant t)
+ (forward-char 2)
+ (skip-chars-forward " \t")))
+ (if (looking-at "+")
+ (progn
+ (forward-char 1)
+ (set-mark (point))
+ (re-search-forward "[ \t\n]")
+ (backward-char 1)
+ (setq ex-offset (buffer-substring (point) (mark t)))
+ (forward-char 1)
+ (skip-chars-forward " \t")))
+ ;; this takes care of :r, :w, etc., when they get file names
+ ;; from the history list
+ (if (member ex-token '("read" "write" "edit" "visual"))
+ (progn
+ (setq ex-file (buffer-substring (point) (1- (point-max))))
+ (setq ex-file
+ ;; For :e, match multiple non-white strings separated
+ ;; by white. For others, find the first non-white string
+ (if (string-match
+ (if (string= ex-token "edit")
+ "[^ \t\n]+\\([ \t]+[^ \t\n]+\\)*"
+ "[^ \t\n]+")
+ ex-file)
+ (progn
+ ;; if file name comes from history, don't leave
+ ;; minibuffer when the user types space
+ (setq vip-incomplete-ex-cmd nil)
+ ;; this must be the last clause in this progn
+ (substring ex-file (match-beginning 0) (match-end 0))
+ )
+ ""))
+ ;; this leaves only the command name in the work area
+ ;; file names are gone
+ (delete-region (point) (1- (point-max)))
+ ))
+ (goto-char (point-max))
+ (skip-chars-backward " \t\n")
+ (setq prompt (buffer-substring (point-min) (point)))
+ ))
+
+ (setq vip-last-ex-prompt prompt)
+
+ ;; If we just finished reading command, redisplay prompt
+ (if vip-incomplete-ex-cmd
+ (setq ex-file (vip-ex-read-file-name (format ":%s " prompt)))
+ ;; file was typed in-line
+ (setq ex-file (or ex-file "")))
+ ))
+
+
+;; Completes file name or exits minibuffer. If Ex command accepts multiple
+;; file names, arranges to re-enter the minibuffer.
+(defun vip-complete-filename-or-exit ()
+ (interactive)
+ (setq vip-keep-reading-filename t)
+ ;; don't exit if directory---ex-commands don't
+ (cond ((ex-cmd-accepts-multiple-files-p ex-token) (exit-minibuffer))
+ (t (minibuffer-complete-word))))
+
+
+(defun ex-cmd-accepts-multiple-files-p (token)
+ (member token '("edit" "next" "Next")))
+
+;; If user doesn't enter anything, then "" is returned, i.e., the
+;; prompt-directory is not returned.
+(defun vip-ex-read-file-name (prompt)
+ (let* ((str "")
+ (minibuffer-local-completion-map
+ (copy-keymap minibuffer-local-completion-map))
+ beg end cont val)
+
+ (vip-add-keymap ex-read-filename-map minibuffer-local-completion-map)
+
+ (setq cont (setq vip-keep-reading-filename t))
+ (while cont
+ (setq vip-keep-reading-filename nil
+ val (read-file-name (concat prompt str) nil default-directory)
+ str (concat str (if (equal val "") "" " ")
+ val (if (equal val "") "" " ")))
+
+ ;; Only edit, next, and Next commands accept multiple files.
+ ;; vip-keep-reading-filename is set in the anonymous function that is
+ ;; bound to " " in ex-read-filename-map.
+ (setq cont (and vip-keep-reading-filename
+ (ex-cmd-accepts-multiple-files-p ex-token)))
+ )
+
+ (setq beg (string-match "[^ \t]" str) ;; delete leading blanks
+ end (string-match "[ \t]*$" str)) ;; delete trailing blanks
+ (if (member ex-token '("read" "write"))
+ (if (string-match "[\t ]*!" str)
+ ;; this is actually a shell command
+ (progn
+ (setq ex-cmdfile t)
+ (setq beg (1+ beg))
+ (setq vip-last-ex-prompt (concat vip-last-ex-prompt " !")))))
+ (substring str (or beg 0) end)))
+
+(defun vip-execute-ex-command ()
+ "Execute ex command using the value of addresses."
+ (vip-deactivate-mark)
+ (cond ((string= ex-token "args") (ex-args))
+ ((string= ex-token "copy") (ex-copy nil))
+ ((string= ex-token "cd") (ex-cd))
+ ((string= ex-token "chdir") (ex-cd))
+ ((string= ex-token "delete") (ex-delete))
+ ((string= ex-token "edit") (ex-edit))
+ ((string= ex-token "file") (vip-info-on-file))
+ ((string= ex-token "goto") (ex-goto))
+ ((string= ex-token "help") (ex-help))
+ ((string= ex-token "join") (ex-line "join"))
+ ((string= ex-token "kmark") (ex-mark))
+ ((string= ex-token "mark") (ex-mark))
+ ((string= ex-token "map") (ex-map))
+ ((string= ex-token "move") (ex-copy t))
+ ((string= ex-token "next") (ex-next ex-cycle-other-window))
+ ((string= ex-token "Next") (ex-next (not ex-cycle-other-window)))
+ ((string= ex-token "RelatedFile") (ex-next-related-buffer 1))
+ ((string= ex-token "put") (ex-put))
+ ((string= ex-token "pwd") (ex-pwd))
+ ((string= ex-token "preserve") (ex-preserve))
+ ((string= ex-token "PreviousRelatedFile") (ex-next-related-buffer -1))
+ ((string= ex-token "quit") (ex-quit))
+ ((string= ex-token "read") (ex-read))
+ ((string= ex-token "recover") (ex-recover))
+ ((string= ex-token "rewind") (ex-rewind))
+ ((string= ex-token "submitReport") (vip-submit-report))
+ ((string= ex-token "set") (ex-set))
+ ((string= ex-token "shell") (ex-shell))
+ ((string= ex-token "source") (ex-source))
+ ((string= ex-token "sr") (ex-substitute t t))
+ ((string= ex-token "substitute") (ex-substitute))
+ ((string= ex-token "suspend") (suspend-emacs))
+ ((string= ex-token "stop") (suspend-emacs))
+ ((string= ex-token "transfer") (ex-copy nil))
+ ((string= ex-token "buffer") (if ex-cycle-other-window
+ (vip-switch-to-buffer-other-window)
+ (vip-switch-to-buffer)))
+ ((string= ex-token "Buffer") (if ex-cycle-other-window
+ (vip-switch-to-buffer)
+ (vip-switch-to-buffer-other-window)))
+ ((string= ex-token "tag") (ex-tag))
+ ((string= ex-token "undo") (vip-undo))
+ ((string= ex-token "unmap") (ex-unmap))
+ ((string= ex-token "version") (vip-version))
+ ((string= ex-token "visual") (ex-edit))
+ ((string= ex-token "write") (ex-write nil))
+ ((string= ex-token "Write") (save-some-buffers))
+ ((string= ex-token "wq") (ex-write t))
+ ((string= ex-token "WWrite") (save-some-buffers t)) ; don't ask
+ ((string= ex-token "xit") (ex-write t))
+ ((string= ex-token "yank") (ex-yank))
+ ((string= ex-token "!") (ex-command))
+ ((string= ex-token "=") (ex-line-no))
+ ((string= ex-token ">") (ex-line "right"))
+ ((string= ex-token "<") (ex-line "left"))
+ ((string= ex-token "&") (ex-substitute t))
+ ((string= ex-token "~") (ex-substitute t t))
+ ((or (string= ex-token "append")
+ (string= ex-token "change")
+ (string= ex-token "insert")
+ (string= ex-token "open"))
+ (error
+ (format "`%s': Obsolete command, not supported by Viper"
+ ex-token)))
+ ((or (string= ex-token "abbreviate")
+ (string= ex-token "unabbreviate"))
+ (error
+ (format
+ "`%s': Vi's abbrevs are obsolete. Use more powerful Emacs' abbrevs"
+ ex-token)))
+ ((or (string= ex-token "list")
+ (string= ex-token "print")
+ (string= ex-token "z")
+ (string= ex-token "#"))
+ (error
+ (format "`%s': Command not implemented in Viper" ex-token)))
+ (t (error (format "`%s': %s" ex-token vip-BadExCommand)))))
+
+(defun vip-undisplayed-files ()
+ (mapcar
+ (function
+ (lambda (b)
+ (if (null (get-buffer-window b))
+ (let ((f (buffer-file-name b)))
+ (if f f
+ (if ex-cycle-through-non-files
+ (let ((s (buffer-name b)))
+ (if (string= " " (substring s 0 1))
+ nil
+ s))
+ nil)))
+ nil)))
+ (buffer-list)))
+
+
+(defun ex-args ()
+ (let ((l (vip-undisplayed-files))
+ (args "")
+ (file-count 1))
+ (while (not (null l))
+ (if (car l)
+ (setq args (format "%s %d) %s\n" args file-count (car l))
+ file-count (1+ file-count)))
+ (setq l (cdr l)))
+ (if (string= args "")
+ (message "All files are already displayed")
+ (save-excursion
+ (save-window-excursion
+ (with-output-to-temp-buffer " *vip-info*"
+ (princ "\n\nThese files are not displayed in any window.\n")
+ (princ "\n=============\n")
+ (princ args)
+ (princ "\n=============\n")
+ (princ "\nThe numbers can be given as counts to :next. ")
+ (princ "\n\nPress any key to continue...\n\n"))
+ (vip-read-char-exclusive))))))
+
+(defun ex-cd ()
+ "Ex cd command. Default directory of this buffer changes."
+ (vip-get-ex-file)
+ (if (string= ex-file "")
+ (setq ex-file "~"))
+ (setq default-directory (file-name-as-directory (expand-file-name ex-file))))
+
+(defun ex-copy (del-flag)
+ "Ex copy and move command. DEL-FLAG means delete."
+ (vip-default-ex-addresses)
+ (let ((address (vip-get-ex-address))
+ (end (car ex-addresses)) (beg (car (cdr ex-addresses))))
+ (goto-char end)
+ (save-excursion
+ (push-mark beg t)
+ (vip-enlarge-region (mark t) (point))
+ (if del-flag
+ (kill-region (point) (mark t))
+ (copy-region-as-kill (point) (mark t)))
+ (if ex-flag
+ (progn
+ (with-output-to-temp-buffer "*copy text*"
+ (princ
+ (if (or del-flag ex-g-flag ex-g-variant)
+ (current-kill 0)
+ (buffer-substring (point) (mark t)))))
+ (condition-case nil
+ (progn
+ (read-string "[Hit return to continue] ")
+ (save-excursion (kill-buffer "*copy text*")))
+ (quit (save-excursion (kill-buffer "*copy text*"))
+ (signal 'quit nil))))))
+ (if (= address 0)
+ (goto-char (point-min))
+ (goto-char address)
+ (forward-line 1))
+ (insert (current-kill 0))))
+
+(defun ex-delete ()
+ "Ex delete command."
+ (vip-default-ex-addresses)
+ (vip-get-ex-buffer)
+ (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
+ (if (> beg end) (error vip-FirstAddrExceedsSecond))
+ (save-excursion
+ (vip-enlarge-region beg end)
+ (exchange-point-and-mark)
+ (if ex-count
+ (progn
+ (set-mark (point))
+ (forward-line (1- ex-count)))
+ (set-mark end))
+ (vip-enlarge-region (point) (mark t))
+ (if ex-flag
+ ;; show text to be deleted and ask for confirmation
+ (progn
+ (with-output-to-temp-buffer " *delete text*"
+ (princ (buffer-substring (point) (mark t))))
+ (condition-case nil
+ (read-string "[Hit return to continue] ")
+ (quit
+ (save-excursion (kill-buffer " *delete text*"))
+ (error "")))
+ (save-excursion (kill-buffer " *delete text*")))
+ (if ex-buffer
+ (cond ((vip-valid-register ex-buffer '(Letter))
+ (vip-append-to-register
+ (downcase ex-buffer) (point) (mark t)))
+ ((vip-valid-register ex-buffer)
+ (copy-to-register ex-buffer (point) (mark t) nil))
+ (t (error vip-InvalidRegister ex-buffer))))
+ (kill-region (point) (mark t))))))
+
+
+
+(defun ex-edit (&optional file)
+ "Ex edit command.
+In Viper, `e' and `e!' behave identically. In both cases, the user is
+asked if current buffer should really be discarded.
+This command can take multiple file names. It replaces the current buffer
+with the first file in its argument list."
+ (if (not file)
+ (vip-get-ex-file))
+ (cond ((and (string= ex-file "") buffer-file-name)
+ (setq ex-file (abbreviate-file-name (buffer-file-name))))
+ ((string= ex-file "")
+ (error vip-NoFileSpecified)))
+
+ (let (msg do-edit)
+ (if buffer-file-name
+ (cond ((buffer-modified-p)
+ (setq msg
+ (format "Buffer %s is modified. Edit buffer? "
+ (buffer-name))
+ do-edit t))
+ ((not (verify-visited-file-modtime (current-buffer)))
+ (setq msg
+ (format "File %s changed on disk. Reread from disk? "
+ buffer-file-name)
+ do-edit t))
+ (t (setq do-edit nil))))
+
+ (if do-edit
+ (if (yes-or-no-p msg)
+ (progn
+ (set-buffer-modified-p nil)
+ (kill-buffer (current-buffer)))
+ (message "Buffer %s was left intact" (buffer-name))))
+ ) ; let
+
+ (if (null (setq file (get-file-buffer ex-file)))
+ (progn
+ (ex-find-file ex-file)
+ (vip-change-state-to-vi)
+ (goto-char (point-min)))
+ (switch-to-buffer file))
+ (if ex-offset
+ (progn
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (delete-region (point-min) (point-max))
+ (insert ex-offset "\n")
+ (goto-char (point-min)))
+ (goto-char (vip-get-ex-address))
+ (beginning-of-line)))
+ (ex-fixup-history vip-last-ex-prompt ex-file))
+
+;; splits the string FILESPEC into substrings separated by newlines `\012'
+;; each line assumed to be a file name. find-file's each file thus obtained.
+(defun ex-find-file (filespec)
+ (let (s f filebuf)
+ (if (string-match "[^a-zA-Z0-9_.-/]" filespec)
+ (progn
+ (save-excursion
+ (set-buffer (get-buffer-create " ex-tmp"))
+ (call-process ex-find-file-shell nil t nil
+ ex-find-file-shell-options
+ "-c"
+ (format "echo %s | tr ' ' '\\012'" filespec))
+ (goto-char (point-min))
+ (while (not (eobp))
+ (setq s (point))
+ (end-of-line)
+ (setq f (buffer-substring s (point)))
+ (setq filebuf (find-file-noselect f))
+ (forward-to-indentation 1))
+ (kill-buffer (current-buffer))))
+ (setq filebuf (find-file-noselect (setq f filespec))))
+ (switch-to-buffer filebuf)
+ ))
+
+(defun ex-global (variant)
+ "Ex global command."
+ (let ((gcommand ex-token))
+ (if (or ex-g-flag ex-g-variant)
+ (error "`%s' within `global' is not allowed" gcommand)
+ (if variant
+ (setq ex-g-flag nil
+ ex-g-variant t)
+ (setq ex-g-flag t
+ ex-g-variant nil)))
+ (vip-get-ex-pat)
+ (if (null ex-token)
+ (error "`%s': Missing regular expression" gcommand)))
+
+ (if (string= ex-token "")
+ (if (null vip-s-string)
+ (error vip-NoPrevSearch)
+ (setq ex-g-pat vip-s-string))
+ (setq ex-g-pat ex-token
+ vip-s-string ex-token))
+ (if (null ex-addresses)
+ (setq ex-addresses (list (point-max) (point-min)))
+ (vip-default-ex-addresses))
+ (let ((marks nil) (mark-count 0)
+ com-str (end (car ex-addresses)) (beg (car (cdr ex-addresses))))
+ (if (> beg end) (error vip-FirstAddrExceedsSecond))
+ (save-excursion
+ (vip-enlarge-region beg end)
+ (exchange-point-and-mark)
+ (let ((cont t) (limit (point-marker)))
+ (exchange-point-and-mark)
+ ;; skip the last line if empty
+ (beginning-of-line)
+ (if (eobp) (vip-backward-char-carefully))
+ (while (and cont (not (bobp)) (>= (point) limit))
+ (beginning-of-line)
+ (set-mark (point))
+ (end-of-line)
+ (let ((found (re-search-backward ex-g-pat (mark t) t)))
+ (if (or (and ex-g-flag found)
+ (and ex-g-variant (not found)))
+ (progn
+ (end-of-line)
+ (setq mark-count (1+ mark-count))
+ (setq marks (cons (point-marker) marks)))))
+ (beginning-of-line)
+ (if (bobp) (setq cont nil)
+ (forward-line -1)
+ (end-of-line)))))
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (setq com-str (buffer-substring (1+ (point)) (1- (point-max)))))
+ (while marks
+ (goto-char (car marks))
+ (vip-ex com-str)
+ (setq mark-count (1- mark-count))
+ (setq marks (cdr marks)))))
+
+(defun ex-goto ()
+ "Ex goto command."
+ (if (null ex-addresses)
+ (setq ex-addresses (cons (point) nil)))
+ (push-mark (point) t)
+ (goto-char (car ex-addresses))
+ (beginning-of-line))
+
+(defun ex-line (com)
+ "Ex line commands. COM is join, shift-right or shift-left."
+ (vip-default-ex-addresses)
+ (vip-get-ex-count)
+ (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))) point)
+ (if (> beg end) (error vip-FirstAddrExceedsSecond))
+ (save-excursion
+ (vip-enlarge-region beg end)
+ (exchange-point-and-mark)
+ (if ex-count
+ (progn
+ (set-mark (point))
+ (forward-line ex-count)))
+ (if ex-flag
+ ;; show text to be joined and ask for confirmation
+ (progn
+ (with-output-to-temp-buffer " *text*"
+ (princ (buffer-substring (point) (mark t))))
+ (condition-case nil
+ (progn
+ (read-string "[Hit return to continue] ")
+ (ex-line-subr com (point) (mark t)))
+ (quit (ding)))
+ (save-excursion (kill-buffer " *text*")))
+ (ex-line-subr com (point) (mark t)))
+ (setq point (point)))
+ (goto-char (1- point))
+ (beginning-of-line)))
+
+(defun ex-line-subr (com beg end)
+ (cond ((string= com "join")
+ (goto-char (min beg end))
+ (while (and (not (eobp)) (< (point) (max beg end)))
+ (end-of-line)
+ (if (and (<= (point) (max beg end)) (not (eobp)))
+ (progn
+ (forward-line 1)
+ (delete-region (point) (1- (point)))
+ (if (not ex-variant) (fixup-whitespace))))))
+ ((or (string= com "right") (string= com "left"))
+ (indent-rigidly
+ (min beg end) (max beg end)
+ (if (string= com "right") vip-shift-width (- vip-shift-width)))
+ (goto-char (max beg end))
+ (end-of-line)
+ (vip-forward-char-carefully))))
+
+
+(defun ex-mark ()
+ "Ex mark command."
+ (let (char)
+ (if (null ex-addresses)
+ (setq ex-addresses
+ (cons (point) nil)))
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (if (looking-at "[a-z]")
+ (progn
+ (setq char (following-char))
+ (forward-char 1)
+ (skip-chars-forward " \t")
+ (if (not (looking-at "[\n|]"))
+ (error "`%s': %s" ex-token vip-SpuriousText)))
+ (error "`%s' requires a following letter" ex-token)))
+ (save-excursion
+ (goto-char (car ex-addresses))
+ (point-to-register (1+ (- char ?a))))))
+
+
+
+;; Alternate file is the file next to the first one in the buffer ring
+(defun ex-next (cycle-other-window &optional find-alt-file)
+ (catch 'ex-edit
+ (let (count l)
+ (if (not find-alt-file)
+ (progn
+ (vip-get-ex-file)
+ (if (or (char-or-string-p ex-offset)
+ (not (string= "" ex-file)))
+ ;(and (not (string= "" ex-file))
+ ; (not (string-match "[0-9]+" ex-file))))
+ (progn
+ (ex-edit t)
+ (throw 'ex-edit nil))
+ (setq count (string-to-int ex-file))
+ (if (= count 0) (setq count 1))
+ (if (< count 0) (error "Usage: `next <count>' (count >= 0)"))))
+ (setq count 1))
+ (setq l (vip-undisplayed-files))
+ (while (> count 0)
+ (while (and (not (null l)) (null (car l)))
+ (setq l (cdr l)))
+ (setq count (1- count))
+ (if (> count 0)
+ (setq l (cdr l))))
+ (if find-alt-file (car l)
+ (progn
+ (if (car l)
+ (let* ((w (if cycle-other-window
+ (get-lru-window) (selected-window)))
+ (b (window-buffer w)))
+ (set-window-buffer w (get-file-buffer (car l)))
+ (bury-buffer b))
+ (error "Not that many undisplayed files")))))))
+
+
+(defun ex-next-related-buffer (direction &optional no-recursion)
+
+ (vip-ring-rotate1 vip-related-files-and-buffers-ring direction)
+
+ (let ((file-or-buffer-name
+ (vip-current-ring-item vip-related-files-and-buffers-ring))
+ (old-ring vip-related-files-and-buffers-ring)
+ (old-win (selected-window))
+ skip-rest buf wind)
+
+ (or (and (ring-p vip-related-files-and-buffers-ring)
+ (> (ring-length vip-related-files-and-buffers-ring) 0))
+ (error "This buffer has no related files or buffers"))
+
+ (or (stringp file-or-buffer-name)
+ (error
+ "File and buffer names must be strings, %S" file-or-buffer-name))
+
+ (setq buf (cond ((get-buffer file-or-buffer-name))
+ ((file-exists-p file-or-buffer-name)
+ (find-file-noselect file-or-buffer-name))
+ ))
+
+ (if (not (vip-buffer-live-p buf))
+ (error "Didn't find buffer %S or file %S"
+ file-or-buffer-name
+ (abbreviate-file-name (expand-file-name file-or-buffer-name))))
+
+ (if (equal buf (current-buffer))
+ (or no-recursion
+ ;; try again
+ (setq skip-rest t)
+ (ex-next-related-buffer direction 'norecursion)))
+
+ (if skip-rest
+ ()
+ ;; setup buffer
+ (if (setq wind (vip-get-visible-buffer-window buf))
+ ()
+ (setq wind (get-lru-window (if vip-xemacs-p nil 'visible)))
+ (set-window-buffer wind buf))
+
+ (if window-system
+ (progn
+ (vip-raise-frame (vip-window-frame wind))
+ (if (equal (vip-window-frame wind) (vip-window-frame old-win))
+ (save-window-excursion (select-window wind) (sit-for 1))
+ (select-window wind)))
+ (save-window-excursion (select-window wind) (sit-for 1)))
+
+ (save-excursion
+ (set-buffer buf)
+ (setq vip-related-files-and-buffers-ring old-ring))
+
+ (setq vip-local-search-start-marker (point-marker))
+ )))
+
+
+(defun ex-preserve ()
+ "Force auto save."
+ (message "Autosaving all buffers that need to be saved...")
+ (do-auto-save t))
+
+(defun ex-put ()
+ "Ex put."
+ (let ((point (if (null ex-addresses) (point) (car ex-addresses))))
+ (vip-get-ex-buffer)
+ (setq vip-use-register ex-buffer)
+ (goto-char point)
+ (if (bobp) (vip-Put-back 1) (vip-put-back 1))))
+
+(defun ex-pwd ()
+ "Ex print working directory."
+ (message default-directory))
+
+(defun ex-quit ()
+ "Ex quit command."
+ (if (< vip-expert-level 3)
+ (save-buffers-kill-emacs)
+ (kill-buffer (current-buffer))))
+
+
+(defun ex-read ()
+ "Ex read command."
+ (vip-get-ex-file)
+ (let ((point (if (null ex-addresses) (point) (car ex-addresses))))
+ (goto-char point)
+ (vip-add-newline-at-eob-if-necessary)
+ (if (not (or (bobp) (eobp))) (forward-line 1))
+ (if (and (not ex-variant) (string= ex-file ""))
+ (progn
+ (if (null buffer-file-name)
+ (error vip-NoFileSpecified))
+ (setq ex-file buffer-file-name)))
+ (if ex-cmdfile
+ (shell-command ex-file t)
+ (insert-file-contents ex-file)))
+ (ex-fixup-history vip-last-ex-prompt ex-file))
+
+;; this function fixes ex-history for some commands like ex-read, ex-edit
+(defun ex-fixup-history (&rest args)
+ (setq vip-ex-history
+ (cons (mapconcat 'identity args " ") (cdr vip-ex-history))))
+
+
+(defun ex-recover ()
+ "Ex recover from emacs \#file\#."
+ (vip-get-ex-file)
+ (if (or ex-append ex-offset)
+ (error "`recover': %s" vip-SpuriousText))
+ (if (string= ex-file "")
+ (progn
+ (if (null buffer-file-name)
+ (error "This buffer isn't visiting any file"))
+ (setq ex-file buffer-file-name))
+ (setq ex-file (expand-file-name ex-file)))
+ (if (and (not (string= ex-file (buffer-file-name)))
+ (buffer-modified-p)
+ (not ex-variant))
+ (error "No write since last change \(:rec! overrides\)"))
+ (recover-file ex-file))
+
+(defun ex-rewind ()
+ "Tell that `rewind' is obsolete and that one should use `:next count'"
+ (message
+ "Use `:n <count>' instead. Counts are obtained from the `:args' command"))
+
+
+;; read variable name for ex-set
+(defun ex-set-read-variable ()
+ (let ((minibuffer-local-completion-map
+ (copy-keymap minibuffer-local-completion-map))
+ (cursor-in-echo-area t)
+ str batch)
+ (define-key
+ minibuffer-local-completion-map " " 'minibuffer-complete-and-exit)
+ (define-key minibuffer-local-completion-map "=" 'exit-minibuffer)
+ (if (vip-set-unread-command-events
+ (ex-get-inline-cmd-args "[ \t]*[a-zA-Z]*[ \t]*" nil "\C-m"))
+ (progn
+ (setq batch t)
+ (vip-set-unread-command-events ?\C-m)))
+ (message ":set <Variable> [= <Value>]")
+ (or batch (sit-for 2))
+
+ (while (string-match "^[ \\t\\n]*$"
+ (setq str
+ (completing-read ":set " ex-variable-alist)))
+ (message ":set <Variable> ")
+ ;; if there are unread events, don't wait
+ (or (vip-set-unread-command-events "") (sit-for 2))
+ ) ; while
+ str))
+
+
+(defun ex-set ()
+ (let ((var (ex-set-read-variable))
+ (val 0)
+ (set-cmd "setq")
+ (ask-if-save t)
+ (auto-cmd-label "; don't touch or else...")
+ (delete-turn-on-auto-fill-pattern
+ "([ \t]*add-hook[ \t]+'vip-insert-state-hooks[ \t]+'turn-on-auto-fill.*)")
+ actual-lisp-cmd lisp-cmd-del-pattern
+ val2 orig-var)
+ (setq orig-var var)
+ (cond ((member var '("ai" "autoindent"))
+ (setq var "vip-auto-indent"
+ val "t"))
+ ((member var '("noai" "noautoindent"))
+ (setq var "vip-auto-indent"
+ val "nil"))
+ ((member var '("ic" "ignorecase"))
+ (setq var "vip-case-fold-search"
+ val "t"))
+ ((member var '("noic" "noignorecase"))
+ (setq var "vip-case-fold-search"
+ val "nil"))
+ ((member var '("ma" "magic"))
+ (setq var "vip-re-search"
+ val "t"))
+ ((member var '("noma" "nomagic"))
+ (setq var "vip-re-search"
+ val "nil"))
+ ((member var '("ro" "readonly"))
+ (setq var "buffer-read-only"
+ val "t"))
+ ((member var '("noro" "noreadonly"))
+ (setq var "buffer-read-only"
+ val "nil"))
+ ((member var '("sm" "showmatch"))
+ (setq var "blink-matching-paren"
+ val "t"))
+ ((member var '("nosm" "noshowmatch"))
+ (setq var "blink-matching-paren"
+ val "nil"))
+ ((member var '("ws" "wrapscan"))
+ (setq var "vip-search-wrap-around-t"
+ val "t"))
+ ((member var '("nows" "nowrapscan"))
+ (setq var "vip-search-wrap-around-t"
+ val "nil")))
+ (if (eq val 0) ;; value must be set by the user
+ (let ((cursor-in-echo-area t))
+ (message (format ":set %s = <Value>" var))
+ ;; if there are unread events, don't wait
+ (or (vip-set-unread-command-events "") (sit-for 2))
+ (setq val (read-string (format ":set %s = " var)))
+ (ex-fixup-history "set" orig-var val)
+
+ ;; check numerical values
+ (if (member var
+ '("sw" "shiftwidth" "ts" "tabstop" "wm" "wrapmargin"))
+ (condition-case nil
+ (or (numberp (setq val2 (car (read-from-string val))))
+ (error "%s: Invalid value, numberp, %S" var val))
+ (error
+ (error "%s: Invalid value, numberp, %S" var val))))
+
+ (cond
+ ((member var '("sw" "shiftwidth"))
+ (setq var "vip-shift-width"))
+ ((member var '("ts" "tabstop"))
+ ;; make it take effect in curr buff and new bufs
+ (kill-local-variable 'tab-width)
+ (setq var "tab-width"
+ set-cmd "setq-default"))
+ ((member var '("tsl" "tab-stop-local"))
+ (setq var "tab-width"
+ set-cmd "setq"
+ ask-if-save nil))
+ ((member var '("wm" "wrapmargin"))
+ ;; make it take effect in curr buff and new bufs
+ (kill-local-variable 'fill-column)
+ (setq var "fill-column"
+ val (format "(- (window-width) %s)" val)
+ set-cmd "setq-default"))
+ ((member var '("sh" "shell"))
+ (setq var "explicit-shell-file-name"
+ val (format "\"%s\"" val)))))
+ (ex-fixup-history "set" orig-var))
+
+ (setq actual-lisp-cmd (format "\n(%s %s %s) %s"
+ set-cmd var val auto-cmd-label))
+ (setq lisp-cmd-del-pattern
+ (format "^\n?[ \t]*([ \t]*%s[ \t]+%s[ \t].*)[ \t]*%s"
+ set-cmd var auto-cmd-label))
+
+ (if (and ask-if-save
+ (y-or-n-p (format "Do you want to save this setting in %s "
+ vip-custom-file-name)))
+ (progn
+ (vip-save-string-in-file
+ actual-lisp-cmd vip-custom-file-name
+ ;; del pattern
+ lisp-cmd-del-pattern)
+ (if (string= var "fill-column")
+ (if (> val2 0)
+ (vip-save-string-in-file
+ (concat
+ "(add-hook 'vip-insert-state-hooks 'turn-on-auto-fill) "
+ auto-cmd-label)
+ vip-custom-file-name
+ delete-turn-on-auto-fill-pattern)
+ (vip-save-string-in-file
+ nil vip-custom-file-name delete-turn-on-auto-fill-pattern)
+ (vip-save-string-in-file
+ nil vip-custom-file-name
+ ;; del pattern
+ lisp-cmd-del-pattern)
+ ))
+ ))
+
+ (message (format "%s %s %s" set-cmd var (if (string-match "^[ \t]*$" val)
+ (format "%S" val)
+ val)))
+ (eval (car (read-from-string actual-lisp-cmd)))
+ (if (string= var "fill-column")
+ (if (> val2 0)
+ (auto-fill-mode 1)
+ (auto-fill-mode -1)))
+
+ ))
+
+;; In inline args, skip regex-forw and (optionally) chars-back.
+;; Optional 3d arg is a string that should replace ' ' to prevent its
+;; special meaning
+(defun ex-get-inline-cmd-args (regex-forw &optional chars-back replace-str)
+ (save-excursion
+ (set-buffer vip-ex-work-buf)
+ (goto-char (point-min))
+ (re-search-forward regex-forw nil t)
+ (let ((beg (point))
+ end)
+ (goto-char (point-max))
+ (if chars-back
+ (skip-chars-backward chars-back)
+ (skip-chars-backward " \t\n\C-m"))
+ (setq end (point))
+ ;; replace SPC with `=' to suppress the special meaning SPC has
+ ;; in Ex commands
+ (goto-char beg)
+ (if replace-str
+ (while (re-search-forward " +" nil t)
+ (replace-match replace-str nil t)
+ (vip-forward-char-carefully)))
+ (goto-char end)
+ (buffer-substring beg end))))
+
+
+(defun ex-shell ()
+ "Ex shell command."
+ (shell))
+
+(defun ex-help ()
+ "Viper help. Invokes Info."
+ (condition-case nil
+ (progn
+ (pop-to-buffer (get-buffer-create "*info*"))
+ (info vip-info-file-name)
+ (message "Type `i' to search for a specific topic"))
+ (error (beep 1)
+ (with-output-to-temp-buffer " *vip-info*"
+ (princ "The Info file for Viper does not seem to be installed.
+
+This file is part of the distribution of Viper. If you do not
+have the full distribution, please obtain it from the `anonymous'
+FTP account at `archive.cis.ohio-state.edu':
+
+ /pub/gnu/emacs/elisp-archive/modes/viper.shar
+
+The Info files for Viper should be installed as <name>, <name>-1, etc.,
+where <name> is the value of `vip-info-file-name'.")))))
+
+(defun ex-source ()
+ "Ex source command. Loads the file specified as argument or `~/.vip'."
+ (vip-get-ex-file)
+ (if (string= ex-file "")
+ (load vip-custom-file-name)
+ (load ex-file)))
+
+(defun ex-substitute (&optional repeat r-flag)
+ "Ex substitute command.
+If REPEAT use previous regexp which is ex-reg-exp or vip-s-string"
+ (let ((opt-g nil)
+ (opt-c nil)
+ (matched-pos nil)
+ (case-fold-search vip-case-fold-search)
+ delim pat repl)
+ (if repeat (setq ex-token nil) (setq delim (vip-get-ex-pat)))
+ (if (null ex-token)
+ (setq pat (if r-flag vip-s-string ex-reg-exp)
+ repl ex-repl
+ delim (string-to-char pat))
+ (setq pat (if (string= ex-token "") vip-s-string ex-token))
+ (setq vip-s-string pat
+ ex-reg-exp pat)
+ (setq delim (vip-get-ex-pat))
+ (if (null ex-token)
+ (setq ex-token ""
+ ex-repl "")
+ (setq repl ex-token
+ ex-repl ex-token)))
+ (while (vip-get-ex-opt-gc delim)
+ (if (string= ex-token "g") (setq opt-g t) (setq opt-c t)))
+ (vip-get-ex-count)
+ (if ex-count
+ (save-excursion
+ (if ex-addresses (goto-char (car ex-addresses)))
+ (set-mark (point))
+ (forward-line (1- ex-count))
+ (setq ex-addresses (cons (point) (cons (mark t) nil))))
+ (if (null ex-addresses)
+ (setq ex-addresses (cons (point) (cons (point) nil)))
+ (if (null (cdr ex-addresses))
+ (setq ex-addresses (cons (car ex-addresses) ex-addresses)))))
+ ;(setq G opt-g)
+ (let ((beg (car ex-addresses))
+ (end (car (cdr ex-addresses)))
+ eol-mark)
+ (save-excursion
+ (vip-enlarge-region beg end)
+ (let ((limit (save-excursion
+ (goto-char (max (point) (mark t)))
+ (point-marker))))
+ (goto-char (min (point) (mark t)))
+ (while (< (point) limit)
+ (end-of-line)
+ (setq eol-mark (point-marker))
+ (beginning-of-line)
+ (if opt-g
+ (progn
+ (while (and (not (eolp))
+ (re-search-forward pat eol-mark t))
+ (if (or (not opt-c) (y-or-n-p "Replace? "))
+ (progn
+ (setq matched-pos (point))
+ (if (not (stringp repl))
+ (error "Can't perform Ex substitution: No previous replacement pattern"))
+ (replace-match repl t t))))
+ (end-of-line)
+ (vip-forward-char-carefully))
+ (if (null pat)
+ (error
+ "Can't repeat Ex substitution: No previous regular expression"))
+ (if (and (re-search-forward pat eol-mark t)
+ (or (not opt-c) (y-or-n-p "Replace? ")))
+ (progn
+ (setq matched-pos (point))
+ (if (not (stringp repl))
+ (error "Can't perform Ex substitution: No previous replacement pattern"))
+ (replace-match repl t t)))
+ (end-of-line)
+ (vip-forward-char-carefully))))))
+ (if matched-pos (goto-char matched-pos))
+ (beginning-of-line)
+ (if opt-c (message "done"))))
+
+(defun ex-tag ()
+ "Ex tag command."
+ (let (tag)
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (set-mark (point))
+ (skip-chars-forward "^ |\t\n")
+ (setq tag (buffer-substring (mark t) (point))))
+ (if (not (string= tag "")) (setq ex-tag tag))
+ (vip-change-state-to-emacs)
+ (condition-case conds
+ (progn
+ (if (string= tag "")
+ (find-tag ex-tag t)
+ (find-tag-other-window ex-tag))
+ (vip-change-state-to-vi))
+ (error
+ (vip-change-state-to-vi)
+ (vip-message-conditions conds)))))
+
+(defun ex-write (q-flag)
+ "Ex write command."
+ (vip-default-ex-addresses t)
+ (vip-get-ex-file)
+ (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses)))
+ temp-buf writing-same-file region
+ file-exists writing-whole-file)
+ (if (> beg end) (error vip-FirstAddrExceedsSecond))
+ (if ex-cmdfile
+ (progn
+ (vip-enlarge-region beg end)
+ (shell-command-on-region (point) (mark t) ex-file))
+ (if (and (string= ex-file "") (not (buffer-file-name)))
+ (setq ex-file
+ (read-file-name
+ (format "Buffer %s isn't visiting any file. File to save in: "
+ (buffer-name)))))
+
+ (setq writing-whole-file (and (= (point-min) beg) (= (point-max) end))
+ ex-file (if (string= ex-file "")
+ (buffer-file-name)
+ (expand-file-name ex-file))
+ file-exists (file-exists-p ex-file)
+ writing-same-file (string= ex-file (buffer-file-name)))
+ (if (and writing-whole-file writing-same-file)
+ (if (not (buffer-modified-p))
+ (message "(No changes need to be saved)")
+ (save-buffer)
+ (ex-write-info file-exists ex-file beg end))
+ ;; writing some other file or portion of the currents
+ ;; file---create temp buffer for it
+ ;; disable undo in that buffer, for efficiency
+ (buffer-disable-undo (setq temp-buf (create-file-buffer ex-file)))
+ (unwind-protect
+ (save-excursion
+ (if (and file-exists
+ (not writing-same-file)
+ (not (yes-or-no-p
+ (format "File %s exists. Overwrite? " ex-file))))
+ (error "Quit")
+ (vip-enlarge-region beg end)
+ (setq region (buffer-substring (point) (mark t)))
+ (set-buffer temp-buf)
+ (set-visited-file-name ex-file)
+ (erase-buffer)
+ (if (and file-exists ex-append)
+ (insert-file-contents ex-file))
+ (goto-char (point-max))
+ (insert region)
+ (save-buffer)
+ (ex-write-info file-exists ex-file (point-min) (point-max))
+ )
+ (set-buffer temp-buf)
+ (set-buffer-modified-p nil)
+ (kill-buffer temp-buf)
+ )
+ ))
+ ;; this prevents the loss of data if writing part of the buffer
+ (if (and (buffer-file-name) writing-same-file)
+ (set-visited-file-modtime))
+ (or writing-whole-file
+ (not writing-same-file)
+ (set-buffer-modified-p t))
+ (if q-flag
+ (if (< vip-expert-level 2)
+ (save-buffers-kill-emacs)
+ (kill-buffer (current-buffer))))
+ )))
+
+
+(defun ex-write-info (exists file-name beg end)
+ (message "`%s'%s %d lines, %d characters"
+ (abbreviate-file-name file-name)
+ (if exists "" " [New file]")
+ (count-lines beg (min (1+ end) (point-max)))
+ (- end beg)))
+
+(defun ex-yank ()
+ "Ex yank command."
+ (vip-default-ex-addresses)
+ (vip-get-ex-buffer)
+ (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
+ (if (> beg end) (error vip-FirstAddrExceedsSecond))
+ (save-excursion
+ (vip-enlarge-region beg end)
+ (exchange-point-and-mark)
+ (if (or ex-g-flag ex-g-variant)
+ (error "Can't execute `yank' within `global'"))
+ (if ex-count
+ (progn
+ (set-mark (point))
+ (forward-line (1- ex-count)))
+ (set-mark end))
+ (vip-enlarge-region (point) (mark t))
+ (if ex-flag (error "`yank': %s" vip-SpuriousText))
+ (if ex-buffer
+ (cond ((vip-valid-register ex-buffer '(Letter))
+ (vip-append-to-register
+ (downcase ex-buffer) (point) (mark t)))
+ ((vip-valid-register ex-buffer)
+ (copy-to-register ex-buffer (point) (mark t) nil))
+ (t (error vip-InvalidRegister ex-buffer))))
+ (copy-region-as-kill (point) (mark t)))))
+
+(defun ex-command ()
+ "Execute shell command."
+ (let (command)
+ (save-window-excursion
+ (set-buffer vip-ex-work-buf)
+ (skip-chars-forward " \t")
+ (setq command (buffer-substring (point) (point-max)))
+ (end-of-line))
+ (setq command (ex-expand-filsyms command (current-buffer)))
+ (if (and (> (length command) 0) (string= "!" (substring command 0 1)))
+ (if vip-ex-last-shell-com
+ (setq command (concat vip-ex-last-shell-com (substring command 1)))
+ (error "No previous shell command")))
+ (setq vip-ex-last-shell-com command)
+ (if (null ex-addresses)
+ (shell-command command)
+ (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
+ (if (null beg) (setq beg end))
+ (save-excursion
+ (goto-char beg)
+ (set-mark end)
+ (vip-enlarge-region (point) (mark t))
+ (shell-command-on-region (point) (mark t) command t))
+ (goto-char beg)))))
+
+(defun ex-line-no ()
+ "Print line number."
+ (message "%d"
+ (1+ (count-lines
+ (point-min)
+ (if (null ex-addresses) (point-max) (car ex-addresses))))))
+
+(defun vip-info-on-file ()
+ "Give information on the file visited by the current buffer."
+ (interactive)
+ (message "%s: pos=%d(%d) line=%d(%d) col=%d %s"
+ (if (buffer-file-name)
+ (abbreviate-file-name (buffer-file-name))
+ "[No visited file]")
+ (point) (1- (point-max))
+ (count-lines (point-min) (vip-line-pos 'end))
+ (count-lines (point-min) (point-max))
+ (1+ (current-column))
+ (if (buffer-modified-p) "[Modified]" "[Unchanged]")
+ ))
+
+
+(provide 'viper-ex)
+
+;;; viper-ex.el ends here
--- /dev/null
+;;; viper.el --- A full-featured Vi emulator for GNU Emacs 19 and XEmacs 19,
+;; a VI Plan for Emacs Rescue,
+;; and a venomous VI PERil.
+;; Viper Is also a Package for Emacs Rebels.
+
+;; Version: 2.71
+;; Keywords: emulations
+;; Author: Michael Kifer <kifer@cs.sunysb.edu>
+
+;; LCD Archive Entry:
+;; viper|Michael Kifer|kifer@cs.sunysb.edu|
+;; A full-featured Vi emulator for GNU Emacs 19 and XEmacs 19|
+;; 17-February-95|2.71|~/modes/viper.tar.Z|
+
+(defconst viper-version "2.71 of February 17, 1995"
+ "The current version of Viper")
+
+;; 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:
+
+;; Viper is a full-featured Vi emulator for Emacs 19. It emulates and
+;; improves upon the standard features of Vi and, at the same time, allows
+;; full access to all Emacs facilities. Viper supports multiple undo,
+;; file name completion, command, file, and search history and it extends
+;; Vi in many other ways. Viper is highly customizable through the various
+;; hooks, user variables, and keymaps. It is implemented as a collection
+;; of minor modes and it is designed to provide full access to all Emacs
+;; major and minor modes.
+;;
+;;; History
+;;
+;; Viper is a new name for a package formerly known as VIP-19,
+;; which was a successor of VIP version 3.5 by Masahiko Sato
+;; <ms@sail.stanford.edu> and VIP version 4.2 by Aamod Sane
+;; <sane@cs.uiuc.edu>. Some ideas from vip 4.4.2 by Aamod Sane
+;; were also shamelessly plagiarized.
+;;
+;; Viper maintains some degree of compatibility with these older
+;; packages. See the documentation for customization.
+;;
+;; The main difference between Viper and these older packages are:
+;;
+;; 1. Viper emulates Vi at several levels, from almost complete conformity
+;; to a rather loose Vi-compliance.
+;;
+;; 2. Viper provides full access to all major and minor modes of Emacs
+;; without the need to type extra keys.
+;; The older versions of VIP (and other Vi emulators) do not work with
+;; some major and minor modes.
+;;
+;; 3. Viper supports vi-style undo.
+;;
+;; 4. Viper fully emulates (and improves upon) vi's replacement mode.
+;;
+;; 5. Viper has a better interface to ex, including command, variable, and
+;; file name completion.
+;;
+;; 6. Viper uses native Emacs history and completion features; it doesn't
+;; rely on other packages (such as gmhist.el and completer.el) to provide
+;; these features.
+;;
+;; 7. Viper supports Vi-style editing in the minibuffer, by allowing the
+;; user to switch from Insert state to Vi state to Replace state, etc.
+;;
+;; 8. Viper keeps history of recently inserted pieces of text and recently
+;; executed Vi-style destructive commands, such as `i', `d', etc.
+;; These pieces of text can be inserted in later insertion commands;
+;; the previous destructive commands can be re-executed.
+;;
+;; 9. Viper has Vi-style keyboard macros, which enhances the similar
+;; facility in the original Vi.
+;; First, one can execute any Emacs command while defining a
+;; macro, not just the Vi commands. Second, macros are defined in a
+;; WYSYWYG mode, using an interface to Emacs' WYSIWYG style of defining
+;; macros. Third, in Viper, one can define macros that are specific to
+;; a given buffer, a given major mode, or macros defined for all buffers.
+;; The same macro name can have several different definitions:
+;; one global, several definitions for various major modes, and
+;; definitions for specific buffers.
+;; Bffer-specific definitions override mode-specific
+;; definitions, which, in turn, override global definitions.
+;;
+;;
+;;; Installation:
+;; -------------
+;;
+;; (require 'viper)
+;;
+
+;;; Acknowledgements:
+;; -----------------
+;; Bug reports and ideas contributed by the following users
+;; have helped improve Viper and the various versions of VIP:
+;;
+;; jjm@hplb.hpl.hp.com (Jean-Jacques Moreau), jl@cse.ogi.edu (John
+;; Launchbury), rxga@ulysses.att.com, jamesm@bga.com (D.J. Miller II),
+;; ascott@fws214.intel.com (Andy Scott), toma@convex.convex.com,
+;; gvr@cs.brown.edu, dave@hellgate.utah.edu, cook@biostat.wisc.edu
+;; (Tom Cook), lindstro@biostat.wisc.edu (Mary Lindstrom),
+;; edmonds@edmonds.home.cs.ubc.ca (Brian Edmonds), mveiga@dit.upm.es
+;; (Marcelino Veiga Tuimil), dwight@toolucky.llnl.gov (Dwight Shih),
+;; phil_brooks@MENTORG.COM (Phil Brooks), kin@isi.com (Kin Cho),
+;; ahg@panix.com (Al Gelders), dwallach@cs.princeton.edu (Dan Wallach),
+;; hpz@ibmhpz.aug.ipp-garching.mpg.de (Hans-Peter Zehrfeld),
+;; simonb@prl.philips.co.uk (Simon Blanchard), Mark.Bordas@East.Sun.COM
+;; (Mark Bordas), gviswana@cs.wisc.edu (Guhan Viswanathan)
+;;
+;; Special thanks to Marcelino Veiga Tuimil <mveiga@dit.upm.es> for
+;; suggesting a way of intercepting ESC sequences on dumb terminals. Due to
+;; this, Viper can now handle arrow keys, F-keys, etc., in Xterm windows
+;; and on dumb terminals. This also made it possible to implement Vi-style
+;; timeout macros.
+;;
+;;
+;;; Notes:
+;;
+;; 1. Major modes.
+;; In most cases, Viper handles major modes correctly, i.e., they come up
+;; in the right state (either vi-state or emacs-state). For instance, text
+;; files come up in vi-state, while, say, Dired appears in emacs-state by
+;; default.
+;; However, some modes do not appear in the right mode in the beginning,
+;; usually because they neglect to follow Emacs conventions (e.g., they don't
+;; use (kill-all-local-variables) when they start. Some major modes
+;; may fail to come up in emacs-state if they call hooks, such as
+;; text-hook, for no good reason.
+;;
+;; As an immediate solution, you can hit C-z to bring about the right mode.
+;; An interim solution is to add an appropriate hook to the mode like this:
+;;
+;; (add-hook 'your-favorite-mode 'viper-mode)
+;; or
+;; (add-hook 'your-favorite-mode 'vip-change-state-to-emacs)
+;;
+;; whichever applies. The right thing to do, however, is to complain to the
+;; author of the respective package. (Sometimes they also neglect to equip
+;; their modes with hooks, which is one more reason for complaining.)
+;;
+;; 2. Keymap handling
+;; Because Emacs 19 has an elegant mechanism for turning minor mode keymaps
+;; on and off, implementation of Viper has been greatly simplified. Viper
+;; has several minor modes.
+;;
+;; Viper's Vi state consists of seven minor modes:
+;;
+;; vip-vi-intercept-minor-mode
+;; vip-vi-local-user-minor-mode
+;; vip-vi-global-user-minor-mode
+;; vip-vi-kbd-minor-mode
+;; vip-vi-state-modifier-minor-mode
+;; vip-vi-diehard-minor-mode
+;; vip-vi-basic-minor-mode
+;;
+;; Bindings done to the keymap of the first mode overshadow those done to
+;; the second, which, in turn, overshadows those done to the third, etc.
+;;
+;; The last vip-vi-basic-minor-mode contains most of the usual Vi bindings
+;; in its edit mode. This mode provides access to all Emacs facilities.
+;; Novice users, however, may want to set their vip-expert-level to 1
+;; in their .vip file. This will enable vip-vi-diehard-minor-mode. This
+;; minor mode's bindings make Viper simulate the usual Vi very closely.
+;; For instance, C-c will not have its standard Emacs binding
+;; and so many of the goodies of Emacs are not available.
+;;
+;; An skilled user, should set vip-expert-level to at least 3. This will
+;; enable ;; C-c and many Emacs facilities will become available.
+;; In this case, vip-vi-diehard-minor-mode is inactive.
+;;
+;; Viper gurus should have at least
+;; (setq vip-expert-level 4)
+;; in their ~/.vip files. This will unsuppress all Emacs keys that are not
+;; essential for VI-style editing.
+;; Pick-and-choose users may want to put
+;; (setq vip-expert-level 5)
+;; in ~/.vip. Viper will then leave it up to the user to set the variables
+;; vip-want-* See vip-set-expert-level for details.
+;;
+;; The very first minor mode, vip-vi-intercept-minor-mode, is of no
+;; concern for the user. It is needed to bind Viper's vital keys, such as
+;; ESC and C-z.
+;;
+;; The second mode, vip-vi-local-user-minor-mode, usually has an
+;; empty keymap. However, the user can set bindings in this keymap, which
+;; will overshadow the corresponding bindings in the other two minor
+;; modes. This is useful, for example, for setting up ZZ in gnus,
+;; rmail, mh-e, etc., to send message instead of saving it in a file.
+;; Likewise, in Dired mode, you may want to bind ZN and ZP to commands
+;; that would visit the next or the previous file in the Dired buffer.
+;; Setting local keys is tricky, so don't do it directly. Instead, use
+;; vip-add-local-keys function (see its doc).
+;;
+;; The third minor mode, vip-vi-global-user-minor-mode, is also intended
+;; for the users but, unlike vip-vi-local-user-minor-mode, its key
+;; bindings are seen in all Viper buffers. This mode keys can be done
+;; with define-key command.
+;;
+;; The fourth minor mode, vip-vi-kbd-minor-mode, is used by keyboard
+;; macros. Users are NOT supposed to modify this keymap directly.
+;;
+;; The fifth mode, vip-vi-state-modifier-minor-mode, can be used to set
+;; key bindings that are visible in some major modes but not in others.
+;;
+;; Users are allowed to modify keymaps that belong to
+;; vip-vi-local-user-minor-mode, vip-vi-global-user-minor-mode,
+;; and vip-vi-state-modifier-minor-mode only.
+;;
+;; Viper's Insert state also has seven minor modes:
+;;
+;; vip-insert-intercept-minor-mode
+;; vip-insert-local-user-minor-mode
+;; vip-insert-global-user-minor-mode
+;; vip-insert-kbd-minor-mode
+;; vip-insert-state-modifier-minor-mode
+;; vip-insert-diehard-minor-mode
+;; vip-insert-basic-minor-mode
+;;
+;; As with VI's editing modes, the first mode, vip-insert-intercept-minor-mode
+;; is used to bind vital keys that are not to be changed by the user.
+;;
+;; The next mode, vip-insert-local-user-minor-mode, is used to customize
+;; bindings in the insert state of Viper. The third mode,
+;; vip-insert-global-user-minor-mode is like
+;; vip-insert-local-user-minor-mode, except that its bindings are seen in
+;; all Viper buffers. As with vip-vi-local-user-minor-mode, its bindings
+;; should be done via the function vip-add-local-keys. Bindings for
+;; vip-insert-global-user-minor-mode can be set with the define-key command.
+;;
+;; The next minor mode, vip-insert-kbd-minor-mode,
+;; is used for keyboard VI-style macros defined with :map!.
+;;
+;; The fifth minor mode, vip-insert-state-modifier-minor-mode, is like
+;; vip-vi-state-modifier-minor-mode, except that it is used in the Insert
+;; state; it can be used to modify keys in a mode-specific fashion.
+;;
+;; The minor mode vip-insert-diehard-minor-mode is in effect when
+;; the user wants a high degree of Vi compatibility (a bad idea, really!).
+;; The last minor mode, vip-insert-basic-minor-mode, is always in effect
+;; when Viper is in insert state. It binds a small number of keys needed for
+;; Viper's operation.
+;;
+;; Finally, Viper provides minor modes for overriding bindings set by Emacs
+;; modes when Viper is in Emacs state:
+;;
+;; vip-emacs-local-user-minor-mode
+;; vip-emacs-global-user-minor-mode
+;; vip-emacs-kbd-minor-mode
+;; vip-emacs-state-modifier-minor-mode
+;;
+;; These minor modes are in effect when Viper is in Emacs state. The keymap
+;; associated with vip-emacs-global-user-minor-mode,
+;; vip-emacs-global-user-map, overrides the global and local keymaps as
+;; well as the minor mode keymaps set by other modes. The keymap of
+;; vip-emacs-local-user-minor-mode, vip-emacs-local-user-map, overrides
+;; everything, but it is used on a per buffer basis.
+;; The keymap associated with vip-emacs-state-modifier-minor-mode
+;; overrides keys on a per-major-mode basis. The mode
+;; vip-emacs-kbd-minor-mode is used to define Vi-style macros in Emacs
+;; state.
+;;
+;; 3. There is also one minor mode that is used when Viper is in its
+;; replace-state (used for commands like cw, C, etc.). This mode is
+;; called
+;;
+;; vip-replace-minor-mode
+;;
+;; and its keymap is vip-replace-map. Replace minor mode is always
+;; used in conjunction with the minor modes for insert-state, and its
+;; keymap overshadows the keymaps for insert minor modes.
+;;
+;; 4. Defining buffer-local bindings in Vi and Insert modes.
+;; As mentioned before, sometimes, it is convenient to have
+;; buffer-specific of mode-specific key bindings in Vi and insert modes.
+;; Viper provides a special function, vip-add-local-keys, to do precisely
+;; this. For instance, is you need to add couple of mode-specific bindings
+;; to Insert mode, you can put
+;;
+;; (vip-add-local-keys 'insert-state '((key1 . func1) (key2 .func2)))
+;;
+;; somewhere in a hook of this major mode. If you put something like this
+;; in your own elisp function, this will define bindings specific to the
+;; buffer that was current at the time of the call to vip-add-local-keys.
+;; The only thing to make sure here is that the major mode of this buffer
+;; is written according to Emacs conventions, which includes a call to
+;; (kill-all-local-variables). See vip-add-local-keys for more details.
+;;
+;;
+;; TO DO (volunteers?):
+;;
+;; 1. Some of the code that is inherited from VIP-3.5 is rather
+;; convoluted. Instead of vip-command-argument, keymaps should bind the
+;; actual commands. E.g., "dw" should be bound to a generic command
+;; vip-delete that will delete things based on the value of
+;; last-command-char. This would greatly simplify the logic and the code.
+;;
+;; 2. Somebody should venture to write a customization package a la
+;; options.el that would allow the user to change values of variables
+;; that meet certain specs (e.g., match a regexp) and whose doc string
+;; starts with a '*'. Then, the user should be offered to save
+;; variables that were changed. This will make user's customization job
+;; much easier.
+;;
+
+
+(require 'advice)
+(require 'cl)
+(require 'ring)
+
+(require 'viper-util)
+
+\f
+;;; Variables
+
+;; Is t until viper-mode executes for the very first time.
+;; Prevents recursive descend into startup messages.
+(defvar vip-first-time t)
+
+(defvar vip-expert-level 0
+ "User's expert level.
+The minor mode vip-vi-diehard-minor-mode is in effect when
+vip-expert-level is 1 or 2 or when vip-want-emacs-keys-in-vi is t.
+The minor mode vip-insert-diehard-minor-mode is in effect when
+vip-expert-level is 1 or 2 or if vip-want-emacs-keys-in-insert is t.
+Use `M-x vip-set-expert-level' to change this.")
+
+;; Max expert level supported by Viper. This is NOT a user option.
+;; It is here to make it hard for the user from resetting it.
+(defconst vip-max-expert-level 5)
+
+;; Contains user settings for vars affected by vip-set-expert-level function.
+;; Not a user option.
+(defvar vip-saved-user-settings nil)
+
+
+;;; Viper minor modes
+
+;; for some reason, this is not local in Emacs, so I made it so.
+(make-variable-buffer-local 'minor-mode-map-alist)
+
+;; Ideally, minor-mode-map-alist should be permanent-local. But Emacs has a
+;; bug that precludes that. So, there is a workaround in
+;; vip-harness-minor-mode.
+;;(put 'minor-mode-map-alist 'permanent-local t)
+
+;; Mode for vital things like \e, C-z.
+(vip-deflocalvar vip-vi-intercept-minor-mode nil)
+
+(vip-deflocalvar vip-vi-basic-minor-mode nil
+ "Viper's minor mode for Vi bindings.")
+
+(vip-deflocalvar vip-vi-local-user-minor-mode nil
+ "Auxiliary minor mode for user-defined local bindings in Vi state.")
+
+(vip-deflocalvar vip-vi-global-user-minor-mode nil
+ "Auxiliary minor mode for user-defined global bindings in Vi state.")
+
+(vip-deflocalvar vip-vi-state-modifier-minor-mode nil
+ "Minor mode used to make major-mode-specific modification to Vi state.")
+
+(vip-deflocalvar vip-vi-diehard-minor-mode nil
+ "This minor mode is in effect when the user wants Viper to be Vi.")
+
+(vip-deflocalvar vip-vi-kbd-minor-mode nil
+ "Minor mode for Ex command macros Vi state.
+The corresponding keymap stores key bindings of Vi macros defined with
+the Ex command :map.")
+
+;; Mode for vital things like \e, C-z.
+(vip-deflocalvar vip-insert-intercept-minor-mode nil)
+
+(vip-deflocalvar vip-insert-basic-minor-mode nil
+ "Viper's minor mode for bindings in Insert mode.")
+
+(vip-deflocalvar vip-insert-local-user-minor-mode nil
+ "Auxiliary minor mode for buffer-local user-defined bindings in Insert state.
+This is a way to overshadow normal Insert mode bindings locally to certain
+designated buffers.")
+
+(vip-deflocalvar vip-insert-global-user-minor-mode nil
+ "Auxiliary minor mode for global user-defined bindings in Insert state.")
+
+(vip-deflocalvar vip-insert-state-modifier-minor-mode nil
+ "Minor mode used to make major-mode-specific modification to Insert state.")
+
+(vip-deflocalvar vip-insert-diehard-minor-mode nil
+ "Minor mode that simulates Vi very closely.
+Not recommened, except for the novice user.")
+
+(vip-deflocalvar vip-insert-kbd-minor-mode nil
+"Minor mode for Ex command macros Insert state.
+The corresponding keymap stores key bindings of Vi macros defined with
+the Ex command :map!.")
+
+(vip-deflocalvar vip-replace-minor-mode nil
+ "Minor mode in effect in replace state (cw, C, and the like commands).")
+
+;; Mode for vital things like \C-z and \C-x)
+;; This is t, by default. So, any new buffer will have C-z defined as
+;; switch to Vi, unless we switched states in this buffer
+(vip-deflocalvar vip-emacs-intercept-minor-mode t)
+
+(vip-deflocalvar vip-emacs-local-user-minor-mode t
+ "Minor mode for local user bindings effective in Emacs state.
+Users can use it to override Emacs bindings when Viper is in its Emacs
+state.")
+
+(vip-deflocalvar vip-emacs-global-user-minor-mode t
+ "Minor mode for global user bindings in effect in Emacs state.
+Users can use it to override Emacs bindings when Viper is in its Emacs
+state.")
+
+(vip-deflocalvar vip-emacs-kbd-minor-mode t
+ "Minor mode for Vi style macros in Emacs state.
+The corresponding keymap stores key bindings of Vi macros defined with
+`vip-record-kbd-macro' command. There is no Ex-level command to do this
+interactively.")
+
+(vip-deflocalvar vip-emacs-state-modifier-minor-mode t
+ "Minor mode used to make major-mode-specific modification to Emacs state.
+For instance, a Vi purist may want to bind `dd' in Dired mode to a function
+that deletes a file.")
+
+
+
+;;; ISO characters
+
+(defvar vip-automatic-iso-accents nil
+ "*If non-nil, ISO accents will be turned on in insert/replace emacs states and turned off in vi-state.
+For some users, this behavior may be too primitive. In this case, use
+insert/emacs/vi state hooks.")
+
+
+;;; Emacs keys in other states.
+
+(defvar vip-want-emacs-keys-in-insert t
+ "*Set to nil if you want complete Vi compatibility in insert mode.
+Complete compatibility with Vi is not recommended for power use of Viper.")
+
+(defvar vip-want-emacs-keys-in-vi t
+ "*Set to nil if you want complete Vi compatibility in Vi mode.
+Full Vi compatibility is not recommended for power use of Viper.")
+
+
+
+;; VI-style Undo
+
+;; Used to 'undo' complex commands, such as replace and insert commands.
+(vip-deflocalvar vip-undo-needs-adjustment nil)
+(put 'vip-undo-needs-adjustment 'permanent-local t)
+
+;; A mark that Viper puts on buffer-undo-list. Marks the beginning of a
+;; complex command that must be undone atomically. If inserted, it is
+;; erased by vip-change-state-to-vi and vip-repeat.
+(defconst vip-buffer-undo-list-mark 'viper)
+
+(defvar vip-keep-point-on-undo nil
+ "*Non-nil means not to move point while undoing commands.
+This style is different from Emacs and Vi. Try it to see if
+it better fits your working style.")
+
+;; Replace mode and changing text
+
+;; Viper's own after/before change functions, which get add-hook'ed to Emacs'
+(vip-deflocalvar vip-after-change-functions nil "")
+(vip-deflocalvar vip-before-change-functions nil "")
+(vip-deflocalvar vip-post-command-hooks nil "")
+(vip-deflocalvar vip-pre-command-hooks nil "")
+
+;; Can be used to pass global states around for short period of time
+(vip-deflocalvar vip-intermediate-command nil "")
+
+;; Indicates that the current destructive command has started in replace mode.
+(vip-deflocalvar vip-began-as-replace nil "")
+
+(defvar vip-replace-overlay-cursor-color "Red"
+ "*Color to use in Replace state")
+
+
+(vip-deflocalvar vip-replace-overlay nil "")
+(put 'vip-replace-overlay 'permanent-local t)
+
+(if window-system
+ (progn
+ (make-face 'vip-replace-overlay-face)
+ (or (face-differs-from-default-p 'vip-replace-overlay-face)
+ (progn
+ (if (vip-can-use-colors "darkseagreen2" "Black")
+ (progn
+ (set-face-background
+ 'vip-replace-overlay-face "darkseagreen2")
+ (set-face-foreground 'vip-replace-overlay-face "Black")))
+ (set-face-underline-p 'vip-replace-overlay-face t))
+ )))
+
+(defvar vip-replace-overlay-face 'vip-replace-overlay-face
+ "*Face for highlighting replace regions on a window display.")
+
+(defvar vip-replace-region-end-symbol
+ (if (and window-system (vip-display-color-p)) "" "$")
+ "*Symbol to mark the end of a replacement region. A string.
+At present, only the first character of a non-empty string is used to
+actually mark the region.")
+(defvar vip-replace-region-start-symbol ""
+ "*Symbol to mark the beginning of a replacement region. A string.
+Not yet implemented.")
+
+;; These are local marker that must be initialized to nil and moved with
+;; `vip-move-marker-locally'
+;;
+;; Remember the last position inside the replace region.
+(vip-deflocalvar vip-last-posn-in-replace-region nil)
+;; Remember the last position while inserting
+(vip-deflocalvar vip-last-posn-while-in-insert-state nil)
+(put 'vip-last-posn-in-replace-region 'permanent-local t)
+(put 'vip-last-posn-while-in-insert-state 'permanent-local t)
+
+(vip-deflocalvar vip-sitting-in-replace nil "")
+(put 'vip-sitting-in-replace 'permanent-local t)
+
+;; Remember the number of characters that have to be deleted in replace
+;; mode to compensate for the inserted characters.
+(vip-deflocalvar vip-replace-chars-to-delete 0 "")
+(vip-deflocalvar vip-replace-chars-deleted 0 "")
+
+;; Insertion ring and command ring
+(defvar vip-insertion-ring-size 14
+ "The size of the insertion ring.")
+;; The insertion ring.
+(defvar vip-insertion-ring nil)
+;; This is temp insertion ring. Used to do rotation for display purposes.
+;; When rotation just started, it is initialized to vip-insertion-ring.
+(defvar vip-temp-insertion-ring nil)
+(defvar vip-last-inserted-string-from-insertion-ring "")
+
+(defvar vip-command-ring-size 14
+ "The size of the command ring.")
+;; The command ring.
+(defvar vip-command-ring nil)
+;; This is temp command ring. Used to do rotation for display purposes.
+;; When rotation just started, it is initialized to vip-command-ring.
+(defvar vip-temp-command-ring nil)
+
+;; Modes and related variables
+
+;; Current mode. One of: `emacs-state', `vi-state', `insert-state'
+(vip-deflocalvar vip-current-state 'emacs-state)
+
+
+(defvar vip-toggle-key "\C-z"
+ "The key used to change states from emacs to Vi and back.
+In insert mode, this key also functions as Meta.
+Must be set in .vip file or prior to loading Viper.
+This setting cannot be changed interactively.")
+
+(defvar vip-ESC-key "\e"
+ "Key used to ESC.
+Must be set in .vip file or prior to loading Viper.
+This setting cannot be changed interactively.")
+
+(defvar vip-no-multiple-ESC t
+ "*If true, multiple ESC in Vi mode will cause bell to ring.
+\_ is then mapped to Meta.
+This is set to t on a windowing terminal and to 'twice on a dumb
+terminal (unless the user level is 1, 2, or 5). On a dumb terminal, this
+enables cursor keys and is generally more convenient, as terminals usually
+don't have a convenient Meta key.
+Setting vip-no-multiple-ESC to nil will allow as many multiple ESC,
+as is allowed by the major mode in effect.")
+
+
+(defvar vip-want-ctl-h-help nil
+ "*If t then C-h is bound to help-command in insert mode, if nil then it is
+bound to delete-backward-char.")
+
+;; Autoindent in insert
+
+;; Variable that keeps track of whether C-t has been pressed.
+(vip-deflocalvar vip-cted nil "")
+
+;; Preserve the indent value, used by C-d in insert mode.
+(vip-deflocalvar vip-current-indent 0)
+
+;; Whether to preserve the indent, used by C-d in insert mode.
+(vip-deflocalvar vip-preserve-indent nil)
+
+(defconst vip-auto-indent nil
+ "*Autoindent if t.")
+
+(defconst vip-shift-width 8
+ "*The shiftwidth variable.")
+
+;; Variables for repeating destructive commands
+
+(defconst vip-keep-point-on-repeat t
+ "*If t, don't move point when repeating previous command.
+This is useful for doing repeated changes with the '.' key.
+The user can change this to nil, if she likes when the cursor moves
+to a new place after repeating previous Vi command.")
+
+;; Remember insert point as a marker. This is a local marker that must be
+;; initialized to nil and moved with `vip-move-marker-locally'.
+(vip-deflocalvar vip-insert-point nil)
+(put 'vip-insert-point 'permanent-local t)
+
+;; This remembers the point before dabbrev-expand was called.
+;; If vip-insert-point turns out to be bigger than that, it is reset
+;; back to vip-pre-command-point.
+;; The reason this is needed is because dabbrev-expand (and possibly
+;; others) may jump to before the insertion point, delete something and
+;; then reinsert a bigger piece. For instance: bla^blo
+;; If dabbrev-expand is called after `blo' and ^ undicates vip-insert-point,
+;; then point jumps to the beginning of `blo'. If expansion is found, `blablo'
+;; is deleted, and we have |^, where | denotes point. Next, dabbrev-expand
+;; will insert the expansion, and we get: blablo^
+;; Whatever we insert next goes before the ^, i.e., before the
+;; vip-insert-point marker. So, Viper will think that nothing was
+;; inserted. Remembering the orig position of the marker circumvents the
+;; problem.
+;; We don't know of any command, except dabbrev-expand, that has the same
+;; problem. However, the same trick can be used if such a command is
+;; discovered later.
+;;
+(vip-deflocalvar vip-pre-command-point nil)
+(put 'vip-pre-command-point 'permanent-local t) ; this is probably an overkill
+
+;; This is used for saving inserted text.
+(defvar vip-last-insertion nil)
+
+;; Remembers the last replaced region.
+(defvar vip-last-replace-region "")
+
+;; Remember com point as a marker.
+;; This is a local marker. Should be moved with `vip-move-marker-locally'
+(vip-deflocalvar vip-com-point nil)
+
+;; If non-nil, the value is a list (M-COM VAL COM REG inserted-text cmd-keys)
+;; It is used to re-execute last destructive command.
+;; M-COM is a Lisp symbol representing the function to be executed.
+;; VAL is the prefix argument that was used with that command.
+;; COM is an internal descriptor, such as ?r, ?c, ?C, which contains
+;; additional information on how the function in M-COM is to be handled.
+;; REG is the register used by command
+;; INSERTED-TEXT is text inserted by that command (in case of o, c, C, i, r
+;; commands).
+;; COMMAND-KEYS are the keys that were typed to invoke the command.
+(defvar vip-d-com nil)
+
+;; The character remembered by the Vi `r' command.
+(defvar vip-d-char nil)
+
+;; Name of register to store deleted or yanked strings
+(defvar vip-use-register nil)
+
+
+
+;; Variables for Moves and Searches
+
+;; For use by `;' 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)
+
+;; Last search string
+(defvar vip-s-string "")
+
+(defvar vip-quote-string "> "
+ "String inserted at the beginning of quoted region.")
+
+;; If t, search is forward.
+(defvar vip-s-forward nil)
+
+(defconst vip-case-fold-search nil
+ "*If t, search ignores cases.")
+
+(defconst vip-re-search t
+ "*If t, search is reg-exp search, otherwise vanilla search.")
+
+(defconst vip-re-query-replace t
+ "*If t then do regexp replace, if nil then do string replace.")
+
+(defconst vip-re-replace t
+ "*If t, do regexp replace. nil means do string replace.")
+
+(vip-deflocalvar vip-ex-style-motion t
+ "*Ex-style: the commands l,h do not cross lines, etc.")
+
+(vip-deflocalvar vip-ex-style-editing-in-insert t
+ "*The keys ^H, ^? don't jump lines in insert, ESC moves cursor back, etc.
+Note: this doesn't preclude ^H and ^? from deleting characters by moving
+past the insertion point. This is a feature, not a bug. ")
+
+(vip-deflocalvar vip-delete-backwards-in-replace nil
+ "*If t, DEL key will delete characters while moving the cursor backwards.
+If nil, the cursor will move backwards without deleting anything.")
+
+(defconst vip-buffer-search-char nil
+ "*Key bound for buffer-searching.")
+
+(defconst vip-search-wrap-around-t t
+ "*If t, search wraps around.")
+
+(vip-deflocalvar vip-related-files-and-buffers-ring nil
+ "*Ring of file and buffer names that are considered to be related to the
+current buffer.
+These buffers can be cycled through via :R and :P commands.")
+(put 'vip-related-files-and-buffers-ring 'permanent-local t)
+
+;; Used to find out if we are done with searching the current buffer.
+(vip-deflocalvar vip-local-search-start-marker nil)
+;; As above, but global
+(defvar vip-search-start-marker (make-marker))
+
+;; the search overlay
+(vip-deflocalvar vip-search-overlay nil)
+
+
+(defvar vip-heading-start
+ (concat "^\\s-*(\\s-*defun\\s-\\|" ;; lisp
+ "^{\\s-*$\\|^[_a-zA-Z][^()]*[()].*{\\s-*$\\|" ;; C/C++
+ "^\\s-*class.*{\\|^\\s-*struct.*{\\|^\\s-*enum.*{\\|"
+ "^\\\\[sb][a-z]*{.*}\\s-*$\\|" ;; latex
+ "^@node\\|@table\\|^@m?enu\\|^@itemize\\|^@if\\|" ;; texinfo
+ "^.+:-") ;; prolog
+ "*Regexps for Headings. Used by \[\[ and \]\].")
+
+(defvar vip-heading-end
+ (concat "^}\\|" ;; C/C++
+ "^\\\\end{\\|" ;; latex
+ "^@end \\|" ;; texinfo
+ ")\n\n[ \t\n]*\\|" ;; lisp
+ "\\.\\s-*$") ;; prolog
+ "*Regexps to end Headings/Sections. Used by \[\].")
+
+
+;; These two vars control the interaction of jumps performed by ' and `.
+;; In this new version, '' doesn't erase the marks set by ``, so one can
+;; use both kinds of jumps interchangeably and without loosing positions
+;; inside the lines.
+
+;; Remembers position of the last jump done using ``'.
+(vip-deflocalvar vip-last-jump nil)
+;; Remembers position of the last jump done using `''.
+(vip-deflocalvar vip-last-jump-ignore 0)
+
+;; Some common error messages
+
+(defconst vip-SpuriousText "Spurious text after command" "")
+(defconst vip-BadExCommand "Not an editor command" "")
+(defconst vip-InvalidCommandArgument "Invalid command argument" "")
+(defconst vip-NoPrevSearch "No previous search string" "")
+(defconst vip-EmptyRegister "`%c': Nothing in this register" "")
+(defconst vip-InvalidRegister "`%c': Invalid register" "")
+(defconst vip-EmptyTextmarker "`%c': Text marker doesn't point anywhere" "")
+(defconst vip-InvalidTextmarker "`%c': Invalid text marker" "")
+(defconst vip-InvalidViCommand "Invalid command" "")
+(defconst vip-BadAddress "Ill-formed address" "")
+(defconst vip-FirstAddrExceedsSecond "First address exceeds second" "")
+(defconst vip-NoFileSpecified "No file specified" "")
+
+
+;; History variables
+
+(defvar vip-history nil)
+;; History of search strings.
+(defvar vip-search-history (list ""))
+;; History of query-replace strings used as a source.
+(defvar vip-replace1-history nil)
+;; History of query-replace strings used as replacement.
+(defvar vip-replace2-history nil)
+;; History of region quoting strings.
+(defvar vip-quote-region-history (list vip-quote-string))
+;; History of Ex-style commands.
+(defvar vip-ex-history nil)
+;; History of shell commands.
+(defvar vip-shell-history nil)
+
+
+;; Last shell command. There are two of these, one for Ex (in viper-ex)
+;; and one for Vi.
+
+;; Last shell command executed with ! command.
+(defvar vip-last-shell-com nil)
+
+
+\f
+;;; Miscellaneous
+
+;; setup emacs-supported vi-style feel
+(setq mark-even-if-inactive t
+ next-line-add-newlines nil
+ require-final-newline t)
+
+(defvar vip-inhibit-startup-message nil
+ "Whether Viper startup message should be inhibited.")
+
+(defvar vip-always t
+ "t means, arrange that vi-state will be a default.")
+
+(defvar vip-custom-file-name "~/.vip"
+ "Viper customisation file.
+This variable must be set _before_ loading Viper.")
+
+(defvar vip-info-file-name "viper"
+ "The name prefix for Viper Info files.")
+
+(defvar vip-spell-function 'ispell-region
+ "Spell function used by #s<move> command to spell.")
+
+(defvar vip-tags-file-name "TAGS")
+
+;; Minibuffer
+
+(defvar vip-vi-style-in-minibuffer t
+ "If t, use vi-style editing in minibuffer.
+Should be set in `~/.vip' file.")
+
+;; overlay used in the minibuffer to indicate which state it is in
+(vip-deflocalvar vip-minibuffer-overlay nil)
+
+;; Hook, specific to Viper, which is run just *before* exiting the minibuffer.
+;; Beginning with Emacs 19.26, the standard `minibuffer-exit-hook' is run
+;; *after* exiting the minibuffer
+(defvar vip-minibuffer-exit-hook nil)
+
+(vip-deflocalvar vip-vi-minibuffer-minor-mode nil
+ "Minor mode that forces Vi-style when the Minibuffer is in Vi state.")
+(vip-deflocalvar vip-insert-minibuffer-minor-mode nil
+ "Minor mode that forces Vi-style when the Minibuffer is in Insert state.")
+
+(vip-deflocalvar vip-add-newline-at-eob t
+ "If t, always add a newline at the end of buffer.
+Usually, Viper adds a newline character at the end of the last
+line in a buffer, if it's missing. In some major modes, however, like
+shell-mode, this is undesirable and must be set to nil. See vip-set-hooks.")
+
+
+;; Mode line
+(defconst vip-vi-state-id "<V> "
+ "Mode line tag identifying the Vi mode of Viper.")
+(defconst vip-emacs-state-id "<E> "
+ "Mode line tag identifying the Emacs mode of Viper.")
+(defconst vip-insert-state-id "<I> "
+ "Mode line tag identifying the Insert mode of Viper.")
+(defconst vip-replace-state-id "<R> "
+ "Mode line tag identifying the Replace mode of Viper.")
+
+;; Viper changes the default mode-line-buffer-identification
+(setq-default mode-line-buffer-identification '(" %b"))
+
+;; Variable displaying the current Viper state in the mode line.
+(vip-deflocalvar vip-mode-string vip-emacs-state-id)
+(or (memq 'vip-mode-string global-mode-string)
+ (setq global-mode-string
+ (append '("" vip-mode-string) (cdr global-mode-string))))
+
+
+(defvar vip-vi-state-hooks nil
+ "*Hooks run just before the switch to Vi mode is completed.")
+(defvar vip-insert-state-hooks nil
+ "*Hooks run just before the switch to Insert mode is completed.")
+(defvar vip-replace-state-hooks nil
+ "*Hooks run just before the switch to Replace mode is completed.")
+(defvar vip-emacs-state-hooks nil
+ "*Hooks run just before the switch to Emacs mode is completed.")
+
+(defvar vip-load-hooks nil
+ "Hooks run just after loading Viper.")
+
+
+;; Generic predicates
+
+;; These test functions are shamelessly lifted from vip 4.4.2 by Aamod Sane
+
+;; generate test functions
+;; given symbol foo, foo-p is the test function, foos is the set of
+;; Viper command keys
+;; (macroexpand '(vip-test-com-defun foo))
+;; (defun foo-p (com) (consp (memq (if (< com 0) (- com) com) foos)))
+
+(defmacro vip-test-com-defun (name)
+ (let* (;;(snm (make-symbol "s1"))
+ (snm (symbol-name name))
+ ;;(nm-p (make-symbol "s2"))
+ (nm-p (intern (concat snm "-p")))
+ ;;(nms (make-symbol "s3"))
+ (nms (intern (concat snm "s"))))
+ (` (defun (, nm-p) (com)
+ (consp (memq (if (< com 0) (- com) com) (, nms)))))))
+
+;; Variables for defining VI commands
+
+(defconst vip-prefix-commands '(?c ?d ?y ?! ?= ?# ?< ?> ?\")
+ "Modifying commands that can be prefixes to movement commands")
+(vip-test-com-defun vip-prefix-command)
+
+(defconst vip-charpair-commands '(?c ?d ?y ?! ?= ?< ?> ?r ?R)
+ "Commands that are pairs eg. dd. r and R here are a hack")
+(vip-test-com-defun vip-charpair-command)
+
+(defconst vip-movement-commands '(?b ?B ?e ?E ?f ?F ?G ?h ?H ?j ?k ?l
+ ?H ?M ?n ?t ?T ?w ?W ?$ ?%
+ ?^ ?( ?) ?- ?+ ?| ?{ ?} ?[ ?] ?' ?`
+ ?; ?, ?0 ?? ?/
+ )
+ "Movement commands")
+(vip-test-com-defun vip-movement-command)
+
+(defconst vip-dotable-commands '(?c ?d ?C ?D ?> ?<)
+ "Commands that can be repeated by .(dotted)")
+(vip-test-com-defun vip-dotable-command)
+
+(defconst vip-hash-cmds '(?c ?C ?g ?q ?S)
+ "Commands that can follow a #")
+(vip-test-com-defun vip-hash-cmd)
+
+(defconst vip-regsuffix-commands '(?d ?y ?Y ?D ?p ?P ?x ?X)
+ "Commands that may have registers as prefix")
+(vip-test-com-defun vip-regsuffix-command)
+
+
+\f
+;;; Arrange the keymaps
+(require 'viper-keym)
+
+\f
+;;;; CODE
+
+;; changing mode
+
+;; Change state to NEW-STATE---either emacs-state, vi-state, or insert-state.
+(defun vip-change-state (new-state)
+ ;; keep them always fresh
+ (add-hook 'post-command-hook 'vip-post-command-sentinel t)
+ (add-hook 'pre-command-hook 'vip-pre-command-sentinel t)
+ ;; These hooks will be added back if switching to insert/replace mode
+ (remove-hook 'vip-post-command-hooks
+ 'vip-insert-state-post-command-sentinel)
+ (remove-hook 'vip-pre-command-hooks
+ 'vip-insert-state-pre-command-sentinel)
+ (cond ((eq new-state 'vi-state)
+ (cond ((member vip-current-state '(insert-state replace-state))
+
+ ;; move vip-last-posn-while-in-insert-state
+ ;; This is a normal hook that is executed in insert/replace
+ ;; states after each command. In Vi/Emacs state, it does
+ ;; nothing. We need to execute it here to make sure that
+ ;; the last posn was recorded when we hit ESC.
+ ;; It may be left unrecorded if the last thing done in
+ ;; insert/repl state was dabbrev-expansion or abbrev
+ ;; expansion caused by hitting ESC
+ (vip-insert-state-post-command-sentinel)
+
+ (condition-case conds
+ (progn
+ (vip-save-last-insertion
+ vip-insert-point
+ vip-last-posn-while-in-insert-state)
+ (if vip-began-as-replace
+ (setq vip-began-as-replace nil)
+ ;; repeat insert commands if numerical arg > 1
+ (save-excursion
+ (vip-repeat-insert-command))))
+ (error
+ (vip-message-conditions conds)))
+
+ (if (> (length vip-last-insertion) 0)
+ (vip-push-onto-ring vip-last-insertion
+ 'vip-insertion-ring))
+
+ (if vip-ex-style-editing-in-insert
+ (or (bolp) (backward-char 1))))
+ ))
+
+ ;; insert or replace
+ ((memq new-state '(insert-state replace-state))
+ (if (memq vip-current-state '(emacs-state vi-state))
+ (vip-move-marker-locally 'vip-insert-point (point)))
+ (vip-move-marker-locally 'vip-last-posn-while-in-insert-state (point))
+ (add-hook 'vip-post-command-hooks
+ 'vip-insert-state-post-command-sentinel t)
+ (add-hook 'vip-pre-command-hooks
+ 'vip-insert-state-pre-command-sentinel t)
+ )
+ ) ; outermost cond
+
+ ;; Nothing needs to be done to switch to emacs mode! Just set some
+ ;; variables, which is done in vip-change-state-to-emacs!
+
+ (setq vip-current-state new-state)
+ (vip-normalize-minor-mode-map-alist)
+ (vip-adjust-keys-for new-state)
+ (vip-set-mode-vars-for new-state)
+ (vip-refresh-mode-line)
+ )
+
+
+
+(defun vip-adjust-keys-for (state)
+ "Make necessary adjustments to keymaps before entering STATE."
+ (cond ((memq state '(insert-state replace-state))
+ (if vip-auto-indent
+ (progn
+ (define-key vip-insert-basic-map "\C-m" 'vip-autoindent)
+ (if vip-want-emacs-keys-in-insert
+ ;; expert
+ (define-key vip-insert-basic-map "\C-j" nil)
+ ;; novice
+ (define-key vip-insert-basic-map "\C-j" 'vip-autoindent))))
+
+ (setq vip-insert-diehard-minor-mode
+ (not vip-want-emacs-keys-in-insert))
+
+ (if vip-want-ctl-h-help
+ (progn
+ (define-key vip-insert-basic-map "\C-h" 'help-command)
+ (define-key vip-replace-map "\C-h" 'help-command))
+ (define-key vip-insert-basic-map
+ "\C-h" 'vip-del-backward-char-in-insert)
+ (define-key vip-replace-map
+ "\C-h" 'vip-del-backward-char-in-replace)))
+
+ (t
+ (setq vip-vi-diehard-minor-mode (not vip-want-emacs-keys-in-vi))
+ (if vip-want-ctl-h-help
+ (define-key vip-vi-basic-map "\C-h" 'help-command)
+ (define-key vip-vi-basic-map "\C-h" 'vip-backward-char)))
+ ))
+
+
+(defun vip-normalize-minor-mode-map-alist ()
+ "Normalizes minor-mode-map-alist by putting Viper keymaps first.
+This ensures that Viper bindings are in effect, regardless of which minor
+modes were turned on by the user or by other packages."
+ (setq minor-mode-map-alist
+ (vip-append-filter-alist
+ (list
+ (cons 'vip-vi-intercept-minor-mode vip-vi-intercept-map)
+ (cons 'vip-vi-minibuffer-minor-mode vip-minibuffer-map)
+ (cons 'vip-vi-local-user-minor-mode vip-vi-local-user-map)
+ (cons 'vip-vi-kbd-minor-mode vip-vi-kbd-map)
+ (cons 'vip-vi-global-user-minor-mode vip-vi-global-user-map)
+ (cons 'vip-vi-state-modifier-minor-mode
+ (if (keymapp
+ (cdr (assoc major-mode vip-vi-state-modifier-alist)))
+ (cdr (assoc major-mode vip-vi-state-modifier-alist))
+ vip-empty-keymap))
+ (cons 'vip-vi-diehard-minor-mode vip-vi-diehard-map)
+ (cons 'vip-vi-basic-minor-mode vip-vi-basic-map)
+ (cons 'vip-insert-intercept-minor-mode vip-insert-intercept-map)
+ (cons 'vip-replace-minor-mode vip-replace-map)
+ ;; vip-insert-minibuffer-minor-mode must come after
+ ;; vip-replace-minor-mode
+ (cons 'vip-insert-minibuffer-minor-mode
+ vip-minibuffer-map)
+ (cons 'vip-insert-local-user-minor-mode
+ vip-insert-local-user-map)
+ (cons 'vip-insert-kbd-minor-mode vip-insert-kbd-map)
+ (cons 'vip-insert-global-user-minor-mode
+ vip-insert-global-user-map)
+ (cons 'vip-insert-state-modifier-minor-mode
+ (if (keymapp
+ (cdr
+ (assoc major-mode vip-insert-state-modifier-alist)))
+ (cdr
+ (assoc major-mode vip-insert-state-modifier-alist))
+ vip-empty-keymap))
+ (cons 'vip-insert-diehard-minor-mode vip-insert-diehard-map)
+ (cons 'vip-insert-basic-minor-mode vip-insert-basic-map)
+ (cons 'vip-emacs-intercept-minor-mode
+ vip-emacs-intercept-map)
+ (cons 'vip-emacs-local-user-minor-mode
+ vip-emacs-local-user-map)
+ (cons 'vip-emacs-kbd-minor-mode vip-emacs-kbd-map)
+ (cons 'vip-emacs-global-user-minor-mode
+ vip-emacs-global-user-map)
+ (cons 'vip-emacs-state-modifier-minor-mode
+ (if (keymapp
+ (cdr
+ (assoc major-mode vip-emacs-state-modifier-alist)))
+ (cdr
+ (assoc major-mode vip-emacs-state-modifier-alist))
+ vip-empty-keymap))
+ )
+ minor-mode-map-alist)))
+
+
+
+
+\f
+;; Viper mode-changing commands and utilities
+
+(defun vip-refresh-mode-line ()
+ "Modifies mode-line-buffer-identification."
+ (setq vip-mode-string
+ (cond ((eq vip-current-state 'emacs-state) vip-emacs-state-id)
+ ((eq vip-current-state 'vi-state) vip-vi-state-id)
+ ((eq vip-current-state 'replace-state) vip-replace-state-id)
+ ((eq vip-current-state 'insert-state) vip-insert-state-id)))
+
+ ;; Sets Viper mode string in global-mode-string
+ (force-mode-line-update))
+
+;;;###autoload
+(defun viper-mode ()
+ "Turn on Viper emulation of Vi."
+ (interactive)
+ (if (not noninteractive)
+ (progn
+ (if vip-first-time ; This check is important. Without it, startup and
+ (progn ; expert-level msgs mix up when viper-mode recurses
+ (setq vip-first-time nil)
+ (if (not vip-inhibit-startup-message)
+ (save-window-excursion
+ (setq vip-inhibit-startup-message t)
+ (delete-other-windows)
+ (switch-to-buffer "Viper Startup Message")
+ (erase-buffer)
+ (insert
+ (substitute-command-keys
+ "Viper Is a Package for Emacs Rebels.
+It is also a VI Plan for Emacs Rescue and a venomous VI PERil.
+
+Technically speaking, Viper is a Vi emulation package for GNU Emacs 19 and
+XEmacs 19. It supports virtually all of Vi and Ex functionality, extending
+and improving upon much of it.
+
+ 1. Viper supports Vi at several levels. Level 1 is the closest to
+ Vi, level 5 provides the most flexibility to depart from many Vi
+ conventions.
+
+ You will be asked to specify your user level in a following screen.
+
+ If you select user level 1 then the keys ^X, ^C, ^Z, and ^G will
+ behave as in VI, to smooth transition to Viper for the beginners.
+ However, to use Emacs productively, you are advised to reach user
+ level 3 or higher.
+
+ If your user level is 2 or higher, ^X and ^C will invoke Emacs
+ functions,as usual in Emacs; ^Z will toggle vi/emacs modes, and
+ ^G will be the usual Emacs's keyboard-quit (something like ^C in VI).
+
+ 2. Vi exit functions (e.g., :wq, ZZ) work on INDIVIDUAL files -- they
+ do not cause Emacs to quit, except at user level 1 (a novice).
+ 3. ^X^C EXITS EMACS.
+ 4. Viper supports multiple undo: `u' will undo. Typing `.' will repeat
+ undo. Another `u' changes direction.
+
+ 6. Emacs Meta functions are invoked by typing `_' or `\\ ESC'.
+ On a window system, the best way is to use the Meta-key.
+ 7. Try \\[keyboard-quit] and \\[abort-recursive-edit] repeatedly,
+ if something funny happens. This would abort the current editing
+ command.
+
+You can get more information on Viper by:
+
+ a. Typing `:help' in Vi state
+ b. Printing Viper manual, found in ./etc/viper.dvi
+ c. Printing ViperCard, the Quick Reference, found in ./etc/viperCard.dvi
+
+This startup message appears whenever you load Viper, unless you type `y' now."
+ ))
+ (goto-char (point-min))
+ (if (y-or-n-p "Inhibit Viper startup message? ")
+ (vip-save-setting
+ 'vip-inhibit-startup-message
+ "Viper startup message inhibited"
+ vip-custom-file-name t))
+ (kill-buffer (current-buffer))))
+ (message " ")
+ (vip-set-expert-level 'dont-change-unless)))
+ (vip-change-state-to-vi))))
+
+;;;###autoload
+(defalias 'vip-mode 'viper-mode)
+
+
+(defun vip-exit-insert-state ()
+ "Switch from Insert state to Vi state."
+ (interactive)
+ (vip-change-state-to-vi))
+
+(defun vip-set-mode-vars-for (state)
+ "Sets Viper minor mode variables to put Viper's state STATE in effect."
+
+ ;; Emacs state
+ (setq vip-vi-minibuffer-minor-mode nil
+ vip-insert-minibuffer-minor-mode nil
+ vip-vi-intercept-minor-mode nil
+ vip-insert-intercept-minor-mode nil
+
+ vip-vi-local-user-minor-mode nil
+ vip-vi-kbd-minor-mode nil
+ vip-vi-global-user-minor-mode nil
+ vip-vi-state-modifier-minor-mode nil
+ vip-vi-diehard-minor-mode nil
+ vip-vi-basic-minor-mode nil
+
+ vip-replace-minor-mode nil
+
+ vip-insert-local-user-minor-mode nil
+ vip-insert-kbd-minor-mode nil
+ vip-insert-global-user-minor-mode nil
+ vip-insert-state-modifier-minor-mode nil
+ vip-insert-diehard-minor-mode nil
+ vip-insert-basic-minor-mode nil
+ vip-emacs-intercept-minor-mode t
+ vip-emacs-local-user-minor-mode t
+ vip-emacs-kbd-minor-mode (not (vip-is-in-minibuffer))
+ vip-emacs-global-user-minor-mode t
+ vip-emacs-state-modifier-minor-mode t
+ )
+
+ ;; Vi state
+ (if (eq state 'vi-state) ; adjust for vi-state
+ (setq
+ vip-vi-intercept-minor-mode t
+ vip-vi-minibuffer-minor-mode (vip-is-in-minibuffer)
+ vip-vi-local-user-minor-mode t
+ vip-vi-kbd-minor-mode (not (vip-is-in-minibuffer))
+ vip-vi-global-user-minor-mode t
+ vip-vi-state-modifier-minor-mode t
+ ;; don't let the diehard keymap block command completion
+ ;; and other things in the minibuffer
+ vip-vi-diehard-minor-mode (not
+ (or vip-want-emacs-keys-in-vi
+ (vip-is-in-minibuffer)))
+ vip-vi-basic-minor-mode t
+ vip-emacs-intercept-minor-mode nil
+ vip-emacs-local-user-minor-mode nil
+ vip-emacs-kbd-minor-mode nil
+ vip-emacs-global-user-minor-mode nil
+ vip-emacs-state-modifier-minor-mode nil
+ ))
+
+ ;; Insert and Replace states
+ (if (member state '(insert-state replace-state))
+ (setq
+ vip-insert-intercept-minor-mode t
+ vip-replace-minor-mode (eq state 'replace-state)
+ vip-insert-minibuffer-minor-mode (vip-is-in-minibuffer)
+ vip-insert-local-user-minor-mode t
+ vip-insert-kbd-minor-mode (not (vip-is-in-minibuffer))
+ vip-insert-global-user-minor-mode t
+ vip-insert-state-modifier-minor-mode t
+ ;; don't let the diehard keymap block command completion
+ ;; and other things in the minibuffer
+ vip-insert-diehard-minor-mode (not
+ (or vip-want-emacs-keys-in-insert
+ (vip-is-in-minibuffer)))
+ vip-insert-basic-minor-mode t
+ vip-emacs-intercept-minor-mode nil
+ vip-emacs-local-user-minor-mode nil
+ vip-emacs-kbd-minor-mode nil
+ vip-emacs-global-user-minor-mode nil
+ vip-emacs-state-modifier-minor-mode nil
+ ))
+
+ ;; minibuffer faces
+ (if window-system
+ (setq vip-minibuffer-current-face
+ (cond ((eq state 'emacs-state) vip-minibuffer-emacs-face)
+ ((eq state 'vi-state) vip-minibuffer-vi-face)
+ ((memq state '(insert-state replace-state))
+ vip-minibuffer-insert-face))))
+
+ (if (vip-is-in-minibuffer)
+ (vip-set-minibuffer-overlay))
+ )
+
+;; This also takes care of the annoying incomplete lines in files.
+;; Also, this fixed 'undo' to work vi-style for complex commands.
+(defun vip-change-state-to-vi ()
+ "Change Viper state to Vi."
+ (interactive)
+ (if (and vip-first-time (not (vip-is-in-minibuffer)))
+ (viper-mode)
+ (if overwrite-mode (overwrite-mode nil))
+ (if abbrev-mode (expand-abbrev))
+ (if (and auto-fill-function (> (current-column) fill-column))
+ (funcall auto-fill-function))
+ (vip-add-newline-at-eob-if-necessary)
+ (if vip-undo-needs-adjustment (vip-adjust-undo))
+ (vip-change-state 'vi-state)
+ (if (and vip-automatic-iso-accents (fboundp 'iso-accents-mode))
+ (iso-accents-mode -1)) ; turn off iso accents
+
+ ;; Protection against user errors in hooks
+ (condition-case conds
+ (run-hooks 'vip-vi-state-hooks)
+ (error
+ (vip-message-conditions conds)))))
+
+(defun vip-change-state-to-insert ()
+ "Change Viper state to Insert."
+ (interactive)
+ (vip-change-state 'insert-state)
+ (if (and vip-automatic-iso-accents (fboundp 'iso-accents-mode))
+ (iso-accents-mode 1)) ; turn iso accents on
+
+ ;; Protection against user errors in hooks
+ (condition-case conds
+ (run-hooks 'vip-insert-state-hooks)
+ (error
+ (vip-message-conditions conds))))
+
+(defsubst vip-downgrade-to-insert ()
+ (setq vip-current-state 'insert-state
+ vip-replace-minor-mode nil)
+ )
+
+
+
+;; Change to replace state. When the end of replacement region is reached,
+;; replace state changes to insert state.
+(defun vip-change-state-to-replace (&optional non-R-cmd)
+ (vip-change-state 'replace-state)
+ (if (and vip-automatic-iso-accents (fboundp 'iso-accents-mode))
+ (iso-accents-mode 1)) ; turn iso accents on
+ ;; Run insert-state-hook
+ (condition-case conds
+ (run-hooks 'vip-insert-state-hooks 'vip-replace-state-hooks)
+ (error
+ (vip-message-conditions conds)))
+
+ (if non-R-cmd
+ (vip-start-replace)
+ ;; 'R' is implemented using Emacs's overwrite-mode
+ (vip-start-R-mode))
+ )
+
+
+(defun vip-change-state-to-emacs ()
+ "Change Viper state to Emacs."
+ (interactive)
+ (vip-change-state 'emacs-state)
+ (if (and vip-automatic-iso-accents (fboundp 'iso-accents-mode))
+ (iso-accents-mode 1)) ; turn iso accents on
+
+ ;; Protection agains user errors in hooks
+ (condition-case conds
+ (run-hooks 'vip-emacs-state-hooks)
+ (error
+ (vip-message-conditions conds))))
+
+;; escape to emacs mode termporarily
+(defun vip-escape-to-emacs (arg &optional events)
+ "Escape to Emacs state from Vi state 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")
+ (vip-escape-to-state arg events 'emacs-state))
+
+;; escape to Vi mode termporarily
+(defun vip-escape-to-vi ()
+ "Escape from Emacs state to Vi state for one Vi 1-character command.
+This doesn't work with prefix arguments or most complex commands like
+cw, dw, etc. But it does work with some 2-character commands,
+like dd or dr."
+ (interactive)
+ (vip-escape-to-state nil nil 'vi-state))
+
+;; Escape to STATE mode for one Emacs command.
+(defun vip-escape-to-state (arg events state)
+ (let (com key prefix-arg)
+ ;; this temporarily turns off Viper's minor mode keymaps
+ (vip-set-mode-vars-for state)
+ (vip-normalize-minor-mode-map-alist)
+ (if events (vip-set-unread-command-events events))
+
+ ;; protect against keyboard quit and other errors
+ (condition-case nil
+ (progn
+ (unwind-protect
+ (progn
+ (setq com (key-binding (setq key
+ (if vip-xemacs-p
+ (read-key-sequence nil)
+ (read-key-sequence nil t)))))
+ ;; In case of indirection--chase definitions.
+ ;; Have to do it here because we execute this command under
+ ;; different keymaps, so command-execute may not do the
+ ;; right thing there
+ (while (vectorp com) (setq com (key-binding com))))
+ nil)
+ ;; exec command in the right Viper state
+ ;; otherwise, if we switch buffers in the escaped command,
+ ;; Viper's mode vars will remain those of `state'. When we return
+ ;; to the orig buffer, the bindings will be screwed up.
+ (vip-set-mode-vars-for vip-current-state)
+
+ ;; this-command, last-command-char, last-command-event
+ (setq this-command com)
+ (if vip-xemacs-p ; XEmacs represents key sequences as vectors
+ (setq last-command-event (vip-seq-last-elt key)
+ last-command-char (event-to-character last-command-event))
+ ;; Emacs represents them as sequences (str or vec)
+ (setq last-command-event (vip-seq-last-elt key)
+ last-command-char last-command-event))
+
+ (if (commandp com)
+ (progn
+ (setq prefix-arg arg)
+ (command-execute com)))
+ )
+ (quit (ding))
+ (error (beep 1))))
+ (vip-set-mode-vars-for vip-current-state)) ; set state in new buffer
+
+(defun vip-exec-form-in-emacs (form)
+ "Execute FORM in Emacs, temporarily disabling Viper's minor modes.
+Similar to vip-escape-to-emacs, but accepts forms rather than keystrokes."
+ (let ((buff (current-buffer))
+ result)
+ (vip-set-mode-vars-for 'emacs-state)
+ (setq result (eval form))
+ (if (not (equal buff (current-buffer))) ; cmd switched buffer
+ (save-excursion
+ (set-buffer buff)
+ (vip-set-mode-vars-for vip-current-state)))
+ (vip-set-mode-vars-for vip-current-state)
+ result))
+
+\f
+
+;; This is needed because minor modes sometimes override essential Viper
+;; bindings. By letting Viper know which files these modes are in, it will
+;; arrange to reorganize minor-mode-map-alist so that things will work right.
+(defun vip-harness-minor-mode (load-file)
+ "Familiarize Viper with a minor mode defined in LOAD_FILE.
+Minor modes that have their own keymaps may overshadow Viper keymaps.
+This function is designed to make Viper aware of the packages that define
+such minor modes.
+Usage:
+ (vip-harness-minor-mode load-file)
+
+LOAD-FILE is a name of the file where the specific minor mode is defined.
+Suffixes such as .el or .elc should be stripped."
+
+ (interactive "sEnter name of the load file: ")
+
+ (vip-eval-after-load load-file '(vip-normalize-minor-mode-map-alist))
+
+ ;; This is a work-around the emacs bug that doesn't let us make
+ ;; minor-mode-map-alist permanent-local.
+ ;; This workaround changes the default for minor-mode-map-alist
+ ;; each time a harnessed minor mode adds its own keymap to the a-list.
+ (vip-eval-after-load load-file '(setq-default minor-mode-map-alist
+ minor-mode-map-alist))
+ )
+
+;; This doesn't work, i.e., doesn't replace vip-harness-minor-mode
+;; function, since autoloaded files don't seem to be loaded with lisp's
+;; `load' function.
+;;(defadvice load (after vip-load-advice activate)
+;; "Rearrange `minor-mode-map-alist' after loading a file or a library."
+;; (vip-normalize-minor-mode-map-alist)
+;; (setq-default minor-mode-map-alist minor-mode-map-alist))
+
+
+\f
+(defun vip-ESC (arg)
+ "Emulate ESC key in Emacs.
+Prevents multiple escape keystrokes if vip-no-multiple-ESC is true. In that
+case \@ will be bound to ESC. If vip-no-multiple-ESC is 'twice double ESC
+would dings in vi-state. Other ESC sequences are emulated via the current
+Emacs's major mode keymap. This is more convenient on dumb terminals and in
+Emacs -nw, since this won't block functional keys such as up,down,
+etc. Meta key also will work. When vip-no-multiple-ESC is nil, ESC key
+behaves as in Emacs, any number of multiple escapes is allowed."
+ (interactive "P")
+ (let (char)
+ (cond ((and (not vip-no-multiple-ESC) (eq vip-current-state 'vi-state))
+ (setq char (vip-read-char-exclusive))
+ (vip-escape-to-emacs arg (list ?\e char) ))
+ ((and (eq vip-no-multiple-ESC 'twice)
+ (eq vip-current-state 'vi-state))
+ (setq char (vip-read-char-exclusive))
+ (if (= char (string-to-char vip-ESC-key))
+ (ding)
+ (vip-escape-to-emacs arg (list ?\e char) )))
+ (t (ding)))
+ ))
+
+(defun vip-alternate-ESC (arg)
+ "ESC key without checking for multiple keystrokes."
+ (interactive "P")
+ (vip-escape-to-emacs arg '(?\e)))
+
+\f
+;; Intercept ESC sequences on dumb terminals.
+;; Based on the idea contributed by Marcelino Veiga Tuimil <mveiga@dit.upm.es>
+
+;; Check if last key was ESC and if so try to reread it as a function key.
+;; But only if there are characters to read during a very short time.
+;; Returns the last event, if any.
+(defun vip-envelop-ESC-key ()
+ (let ((event last-input-event)
+ (keyseq [nil])
+ inhibit-quit)
+ (if (vip-ESC-event-p event)
+ (progn
+ (if (vip-fast-keysequence-p)
+ (progn
+ (let ((vip-vi-intercept-minor-mode nil)
+ (vip-insert-intercept-minor-mode nil)
+ (vip-emacs-intercept-minor-mode nil)
+ (vip-vi-state-modifier-minor-mode nil)
+ (vip-vi-global-user-minor-mode nil)
+ (vip-vi-local-user-minor-mode nil)
+ (vip-replace-minor-mode nil) ; actually unnecessary
+ (vip-insert-state-modifier-minor-mode nil)
+ (vip-insert-global-user-minor-mode nil)
+ (vip-insert-local-user-minor-mode nil)
+ (vip-emacs-state-modifier-minor-mode nil)
+ (vip-emacs-global-user-minor-mode nil)
+ (vip-emacs-local-user-minor-mode nil)
+ )
+ ;; The treatment of XEmacs, below, is temporary, since we
+ ;; don't know how XEmacs will implement dumb terminals.
+ ;; Note: the treatment of fast keysequences here is
+ ;; needed only on dumb terminals in order to be able to
+ ;; handle function keys correctly.
+ (if vip-xemacs-p
+ (setq keyseq (vector event))
+ (vip-set-unread-command-events event)
+ (setq keyseq
+ (funcall
+ (ad-get-orig-definition 'read-key-sequence) nil))
+ ))
+ ;; If keyseq translates into something that still has ESC
+ ;; in the beginning, separate ESC from the rest of the seq.
+ ;;
+ ;; This is needed for the following reason:
+ ;; If ESC is the first symbol, we interpret it as if the
+ ;; user typed ESC and then quickly some other symbols.
+ ;; If ESC is not the first one, then the key sequence
+ ;; entered was apparently translated into a function key or
+ ;; something (e.g., one may have
+ ;; (define-key function-key-map "\e[192z" [f11])
+ ;; which would translate the escape-sequence generated by
+ ;; f11 in an xterm window into the symbolic key f11.
+ (if (vip-ESC-event-p (elt keyseq 0))
+ (progn
+ ;; put keys following ESC on the unread list
+ ;; and return ESC as the key-sequence
+ (vip-set-unread-command-events (subseq keyseq 1))
+ (setq last-input-event event
+ keyseq "\e")))
+ ) ; end progn
+
+ ;; this is escape event with nothing after it
+ ;; put in unread-command-event and then re-read
+ (vip-set-unread-command-events event)
+ (setq keyseq
+ (funcall (ad-get-orig-definition 'read-key-sequence) nil))
+ ))
+ ;; not an escape event
+ (setq keyseq (vector event)))
+ keyseq))
+
+
+
+(defadvice read-key-sequence (around vip-read-key-sequence-ad activate)
+ (let (inhibit-quit event keyseq)
+ (setq keyseq ad-do-it)
+ (setq event (if vip-xemacs-p
+ (elt keyseq 0) ; XEmacs returns vector of events
+ (elt (listify-key-sequence keyseq) 0)))
+ (if (vip-ESC-event-p event)
+ (let (unread-command-events unread-command-event)
+ (vip-set-unread-command-events keyseq)
+ (if (vip-fast-keysequence-p)
+ (let ((vip-vi-global-user-minor-mode nil)
+ (vip-vi-local-user-minor-mode nil)
+ (vip-replace-minor-mode nil) ; actually unnecessary
+ (vip-insert-global-user-minor-mode nil)
+ (vip-insert-local-user-minor-mode nil))
+ (setq keyseq ad-do-it))
+ (setq keyseq ad-do-it))))
+ keyseq))
+
+(defadvice describe-key (before vip-read-key-sequence-ad protect activate)
+ "Force `describe-key' to read key via `read-key-sequence'."
+ (interactive (list (vip-events-to-keys
+ (read-key-sequence "Describe key: ")))))
+
+(defadvice describe-key-briefly
+ (before vip-read-key-sequence-ad protect activate)
+ "Force `describe-key-briefly' to read key via `read-key-sequence'."
+ (interactive (list (vip-events-to-keys
+ (read-key-sequence "Describe key briefly: ")))))
+
+(defun vip-intercept-ESC-key ()
+ "Listen to ESC key.
+If a sequence of keys starting with ESC is issued with very short delays,
+interpret these keys in Emacs mode, so ESC won't be interpreted as a Vi key."
+ (interactive)
+ (let ((cmd (or (key-binding (vip-envelop-ESC-key))
+ '(lambda () (interactive) (error "")))))
+
+ ;; call the actual function to execute ESC (if no other symbols followed)
+ ;; or the key bound to the ESC sequence (if the sequence was issued
+ ;; with very short delay between characters.
+ (if (eq cmd 'vip-intercept-ESC-key)
+ (setq cmd
+ (cond ((eq vip-current-state 'vi-state)
+ 'vip-ESC)
+ ((eq vip-current-state 'insert-state)
+ 'vip-exit-insert-state)
+ ((eq vip-current-state 'replace-state)
+ 'vip-replace-state-exit-cmd)
+ (t 'vip-change-state-to-vi)
+ )))
+ (call-interactively cmd)))
+
+
+\f
+;; 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 (event com)
+ "Compute numeric prefix arg value.
+Invoked by CHAR. COM is the command part obtained so far."
+ (let (value)
+ ;; read while number
+ (while (and (numberp event) (>= event ?0) (<= event ?9))
+ (setq value (+ (* (if (numberp value) value 0) 10) (- event ?0)))
+ (setq event (vip-read-event-convert-to-char)))
+
+ (setq prefix-arg value)
+ (if com (setq prefix-arg (cons prefix-arg com)))
+ (while (eq event ?U)
+ (vip-describe-arg prefix-arg)
+ (setq event (vip-read-event-convert-to-char)))
+ (vip-set-unread-command-events event)))
+
+(defun vip-prefix-arg-com (char value com)
+ "Vi operator as prefix argument."
+ (let ((cont t))
+ (while (and cont
+ (memq char
+ (list ?c ?d ?y ?! ?< ?> ?= ?# ?r ?R ?\"
+ vip-buffer-search-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 (memq 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 the
+ ;; while loop.
+ (cond ((memq 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)))
+ ((= char ?\")
+ (let ((reg (read-char)))
+ (if (vip-valid-register reg)
+ (setq vip-use-register reg)
+ (error ""))
+ (setq char (read-char))))
+ (t
+ (setq com char)
+ (setq char (vip-read-char-exclusive)))))))
+ (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)))
+ (vip-set-unread-command-events char)
+ )
+ ;; as com is non-nil, this means that we have a command to execute
+ (if (memq (car com) '(?r ?R))
+ ;; execute apropriate 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-char
+ (if (consp arg) (cdr arg) nil)))
+
+(defun vip-command-argument (arg)
+ "Accept a motion command as an argument."
+ (interactive "P")
+ (condition-case nil
+ (vip-prefix-arg-com
+ last-command-char
+ (cond ((null arg) nil)
+ ((consp arg) (car arg))
+ ((numberp arg) arg)
+ (t (error vip-InvalidCommandArgument)))
+ (cond ((null arg) nil)
+ ((consp arg) (cdr arg))
+ ((numberp arg) nil)
+ (t (error vip-InvalidCommandArgument))))
+ (quit (setq vip-use-register nil)
+ (signal 'quit nil)))
+ (vip-deactivate-mark))
+
+;; Get value part of prefix-argument ARG.
+(defsubst vip-p-val (arg)
+ (cond ((null arg) 1)
+ ((consp arg) (if (null (car arg)) 1 (car arg)))
+ (t arg)))
+
+;; Get raw value part of prefix-argument ARG.
+(defsubst vip-P-val (arg)
+ (cond ((consp arg) (car arg))
+ (t arg)))
+
+;; Get com part of prefix-argument ARG.
+(defsubst vip-getcom (arg)
+ (cond ((null arg) nil)
+ ((consp arg) (cdr arg))
+ (t nil)))
+
+;; Get com part of prefix-argument ARG and modify it.
+(defun vip-getCom (arg)
+ (let ((com (vip-getcom arg)))
+ (cond ((equal com ?c) ?C)
+ ((equal com ?d) ?D)
+ ((equal com ?y) ?Y)
+ (t com))))
+
+\f
+;; repeat last destructive command
+
+;; Append region to text in register REG.
+;; START and END are buffer positions indicating what to append.
+(defsubst vip-append-to-register (reg start end)
+ (set-register reg (concat (or (get-register reg) "")
+ (buffer-substring start end))))
+
+;; define functions to be executed
+
+;; invoked by C command
+(defun vip-exec-change (m-com com)
+ ;; handle C cmd at the eol and at eob.
+ (if (or (and (eolp) (= vip-com-point (point)))
+ (= vip-com-point (point-max)))
+ (progn
+ (insert " ")(backward-char 1)))
+ (if (= vip-com-point (point))
+ (vip-forward-char-carefully))
+ (if (= com ?c)
+ (vip-change vip-com-point (point))
+ (vip-change-subr vip-com-point (point))))
+
+;; this is invoked by vip-substitute-line
+(defun vip-exec-Change (m-com com)
+ (save-excursion
+ (set-mark vip-com-point)
+ (vip-enlarge-region (mark t) (point))
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '(letter digit))
+ ;;(vip-valid-register vip-use-register '(letter)
+ (copy-to-register
+ vip-use-register (mark t) (point) nil))
+ ((vip-valid-register vip-use-register '(Letter))
+ (vip-append-to-register
+ (downcase vip-use-register) (mark t) (point)))
+ (t (setq vip-use-register nil)
+ (error vip-InvalidRegister vip-use-register)))
+ (setq vip-use-register nil)))
+ (delete-region (mark t) (point)))
+ (open-line 1)
+ (if (= com ?C) (vip-change-mode-to-insert) (vip-yank-last-insertion)))
+
+(defun vip-exec-delete (m-com com)
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '(letter digit))
+ ;;(vip-valid-register vip-use-register '(letter))
+ (copy-to-register
+ vip-use-register vip-com-point (point) nil))
+ ((vip-valid-register vip-use-register '(Letter))
+ (vip-append-to-register
+ (downcase vip-use-register) vip-com-point (point)))
+ (t (setq vip-use-register nil)
+ (error vip-InvalidRegister vip-use-register)))
+ (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)
+ (if vip-ex-style-motion
+ (if (and (eolp) (not (bolp))) (backward-char 1))))
+
+(defun vip-exec-Delete (m-com com)
+ (save-excursion
+ (set-mark vip-com-point)
+ (vip-enlarge-region (mark t) (point))
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '(letter digit))
+ ;;(vip-valid-register vip-use-register '(letter))
+ (copy-to-register
+ vip-use-register (mark t) (point) nil))
+ ((vip-valid-register vip-use-register '(Letter))
+ (vip-append-to-register
+ (downcase vip-use-register) (mark t) (point)))
+ (t (setq vip-use-register nil)
+ (error vip-InvalidRegister vip-use-register)))
+ (setq vip-use-register nil)))
+ (setq last-command
+ (if (eq last-command 'D-command) 'kill-region nil))
+ (kill-region (mark t) (point))
+ (if (eq m-com 'vip-line) (setq this-command 'D-command)))
+ (back-to-indentation))
+
+(defun vip-exec-yank (m-com com)
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '(letter digit))
+ ;; (vip-valid-register vip-use-register '(letter))
+ (copy-to-register
+ vip-use-register vip-com-point (point) nil))
+ ((vip-valid-register vip-use-register '(Letter))
+ (vip-append-to-register
+ (downcase vip-use-register) vip-com-point (point)))
+ (t (setq vip-use-register nil)
+ (error vip-InvalidRegister vip-use-register)))
+ (setq vip-use-register nil)))
+ (setq last-command nil)
+ (copy-region-as-kill vip-com-point (point))
+ (goto-char vip-com-point))
+
+(defun vip-exec-Yank (m-com com)
+ (save-excursion
+ (set-mark vip-com-point)
+ (vip-enlarge-region (mark t) (point))
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '(letter digit))
+ ;;(vip-valid-register vip-use-register '(letter))
+ (copy-to-register
+ vip-use-register (mark t) (point) nil))
+ ((vip-valid-register vip-use-register '(Letter))
+ (vip-append-to-register
+ (downcase vip-use-register) (mark t) (point)))
+ (t (setq vip-use-register nil)
+ (error vip-InvalidRegister vip-use-register)))
+ (setq vip-use-register nil)))
+ (setq last-command nil)
+ (copy-region-as-kill (mark t) (point)))
+ (goto-char vip-com-point))
+
+(defun vip-exec-bang (m-com com)
+ (save-excursion
+ (set-mark vip-com-point)
+ (vip-enlarge-region (mark t) (point))
+ (shell-command-on-region
+ (mark t) (point)
+ (if (= com ?!)
+ (setq vip-last-shell-com
+ (vip-read-string-with-history
+ "!"
+ nil
+ 'vip-shell-history
+ (car vip-shell-history)
+ ))
+ vip-last-shell-com)
+ t)))
+
+(defun vip-exec-equals (m-com com)
+ (save-excursion
+ (set-mark vip-com-point)
+ (vip-enlarge-region (mark t) (point))
+ (if (> (mark t) (point)) (exchange-point-and-mark))
+ (indent-region (mark t) (point) nil)))
+
+(defun vip-exec-shift (m-com com)
+ (save-excursion
+ (set-mark vip-com-point)
+ (vip-enlarge-region (mark t) (point))
+ (if (> (mark t) (point)) (exchange-point-and-mark))
+ (indent-rigidly (mark t) (point)
+ (if (= com ?>)
+ vip-shift-width
+ (- vip-shift-width)))))
+
+;; this is needed because some commands fake com by setting it to ?r, which
+;; denotes repeated insert command.
+(defsubst vip-exec-dummy (m-com com)
+ nil)
+
+(defun vip-exec-buffer-search (m-com com)
+ (setq vip-s-string (buffer-substring (point) vip-com-point))
+ (setq vip-s-forward t)
+ (setq vip-search-history (cons vip-s-string vip-search-history))
+ (vip-search vip-s-string vip-s-forward 1))
+
+(defvar vip-exec-array (make-vector 128 nil))
+
+;; Using a dispatch array allows adding functions like buffer search
+;; without affecting other functions. Buffer search can now be bound
+;; to any character.
+
+(aset vip-exec-array ?c 'vip-exec-change)
+(aset vip-exec-array ?C 'vip-exec-Change)
+(aset vip-exec-array ?d 'vip-exec-delete)
+(aset vip-exec-array ?D 'vip-exec-Delete)
+(aset vip-exec-array ?y 'vip-exec-yank)
+(aset vip-exec-array ?Y 'vip-exec-Yank)
+(aset vip-exec-array ?r 'vip-exec-dummy)
+(aset vip-exec-array ?! 'vip-exec-bang)
+(aset vip-exec-array ?< 'vip-exec-shift)
+(aset vip-exec-array ?> 'vip-exec-shift)
+(aset vip-exec-array ?= 'vip-exec-equals)
+
+
+
+;; This function is called by various movement commands to execute a
+;; destructive command on the region specified by the movement command. For
+;; instance, if the user types cw, then the command vip-forward-word will
+;; call vip-execute-com to execute vip-exec-change, which eventually will
+;; call vip-change to invoke the replace mode on the region.
+;;
+;; The list (M-COM VAL COM REG INSETED-TEXT COMMAND-KEYS) is set to
+;; vip-d-com for later use by vip-repeat.
+(defun vip-execute-com (m-com val com)
+ (let ((reg vip-use-register))
+ ;; this is the special command `#'
+ (if (> com 128)
+ (vip-special-prefix-com (- com 128))
+ (let ((fn (aref vip-exec-array (if (< com 0) (- com) com))))
+ (if (null fn)
+ (error "%c: %s" com vip-InvalidViCommand)
+ (funcall fn m-com com))))
+ (if (vip-dotable-command-p com)
+ (vip-set-destructive-command
+ (list m-com val
+ (if (memq com (list ?c ?C ?!)) (- com) com)
+ reg nil nil)))
+ ))
+
+
+(defun vip-repeat (arg)
+ "Re-execute last destructive command.
+Use the info in vip-d-com, which has the form
+\(com val ch reg inserted-text command-keys\),
+where `com' is the command to be re-executed, `val' is the
+argument to `com', `ch' is a flag for repeat, and `reg' is optional;
+if it exists, it is the name of the register for `com'.
+If the prefix argument, ARG, is non-nil, it is used instead of `val'."
+ (interactive "P")
+ (let ((save-point (point)) ; save point before repeating prev cmd
+ ;; Pass along that we are repeating a destructive command
+ ;; This tells vip-set-destructive-command not to update
+ ;; vip-command-ring
+ (vip-intermediate-command 'vip-repeat))
+ (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 (nth 2 vip-d-com))
+ (reg (nth 3 vip-d-com)))
+ (if (null val) (setq val (nth 1 vip-d-com)))
+ (if (null m-com) (error "No previous command to repeat."))
+ (setq vip-use-register reg)
+ (if (nth 4 vip-d-com) ; text inserted by command
+ (setq vip-last-insertion (nth 4 vip-d-com)
+ vip-d-char (nth 4 vip-d-com)))
+ (funcall m-com (cons val com))
+ (if (and vip-keep-point-on-repeat (< save-point (point)))
+ (goto-char save-point)) ; go back to before repeat.
+ (if (and (eolp) (not (bolp)))
+ (backward-char 1))
+ ))
+ (if vip-undo-needs-adjustment (vip-adjust-undo)) ; take care of undo
+ ;; If the prev cmd was rotating the command ring, this means that `.' has
+ ;; just executed a command from that ring. So, push it on the ring again.
+ ;; If we are just executing previous command , then don't push vip-d-com
+ ;; because vip-d-com is not fully constructed in this case (its keys and
+ ;; the inserted text may be nil). Besides, in this case, the command
+ ;; executed by `.' is already on the ring.
+ (if (eq last-command 'vip-display-current-destructive-command)
+ (vip-push-onto-ring vip-d-com 'vip-command-ring))
+ (vip-deactivate-mark)
+ ))
+
+(defun vip-repeat-from-history ()
+ "Repeat a destructive command from history.
+Doesn't change vip-command-ring in any way, so `.' will work as before
+executing this command.
+This command is supposed to be bound to a two-character Vi macro where
+the second character is a digit 0 to 9. The digit indicates which
+history command to execute. `<char>0' is equivalent to `.', `<char>1'
+invokes the command before that, etc."
+ (interactive)
+ (let* ((vip-intermediate-command 'repeating-display-destructive-command)
+ (idx (cond (vip-this-kbd-macro
+ (string-to-number
+ (symbol-name (elt vip-this-kbd-macro 1))))
+ (t 0)))
+ (num idx)
+ (vip-d-com vip-d-com))
+
+ (or (and (numberp num) (<= 0 num) (<= num 9))
+ (setq idx 0
+ num 0)
+ (message
+ "`vip-repeat-from-history' must be invoked as a Vi macro bound to `<key><digit>'"))
+ (while (< 0 num)
+ (setq vip-d-com (vip-special-ring-rotate1 vip-command-ring -1))
+ (setq num (1- num)))
+ (vip-repeat nil)
+ (while (> idx num)
+ (vip-special-ring-rotate1 vip-command-ring 1)
+ (setq num (1+ num)))
+ ))
+
+
+(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)
+ (push-mark vip-com-point t)
+ (vip-global-execute))
+ ((= char ?q)
+ (push-mark vip-com-point t)
+ (vip-quote-region))
+ ((= char ?s) (funcall vip-spell-function vip-com-point (point)))
+ (t (error "#%c: %s" char vip-InvalidViCommand))))
+
+\f
+;; undoing
+
+(defun vip-undo ()
+ "Undo previous change."
+ (interactive)
+ (message "undo!")
+ (let ((modified (buffer-modified-p))
+ (before-undo-pt (point-marker))
+ (after-change-functions after-change-functions)
+ undo-beg-posn undo-end-posn)
+
+ ;; no need to remove this hook, since this var has scope inside a let.
+ (add-hook 'after-change-functions
+ '(lambda (beg end len)
+ (setq undo-beg-posn beg
+ undo-end-posn (or end beg))))
+
+ (undo-start)
+ (undo-more 2)
+ (setq undo-beg-posn (or undo-beg-posn before-undo-pt)
+ undo-end-posn (or undo-end-posn undo-beg-posn))
+
+ (goto-char undo-beg-posn)
+ (sit-for 0)
+ (if (and vip-keep-point-on-undo
+ (pos-visible-in-window-p before-undo-pt))
+ (progn
+ (push-mark (point-marker) t)
+ (vip-sit-for-short 300)
+ (goto-char undo-end-posn)
+ (vip-sit-for-short 300)
+ (if (and (> (abs (- undo-beg-posn before-undo-pt)) 1)
+ (> (abs (- undo-end-posn before-undo-pt)) 1))
+ (goto-char before-undo-pt)
+ (goto-char undo-beg-posn)))
+ (push-mark before-undo-pt t))
+ (if (and (eolp) (not (bolp))) (backward-char 1))
+ (if (not modified) (set-buffer-modified-p t)))
+ (setq this-command 'vip-undo))
+
+(defun vip-undo-more ()
+ "Continue undoing previous changes."
+ (message "undo more!")
+ (condition-case nil
+ (undo-more 1)
+ (error (beep)
+ (message "No further undo information in this buffer")))
+ (if (and (eolp) (not (bolp))) (backward-char 1))
+ (setq this-command 'vip-undo))
+
+;; The following two functions are used to set up undo properly.
+;; In VI, unlike Emacs, if you open a line, say, and add a bunch of lines,
+;; they are undone all at once.
+(defun vip-adjust-undo ()
+ (let ((inhibit-quit t)
+ tmp tmp2)
+ (setq vip-undo-needs-adjustment nil)
+ (if (listp buffer-undo-list)
+ (if (setq tmp (memq vip-buffer-undo-list-mark buffer-undo-list))
+ (progn
+ (setq tmp2 (cdr tmp)) ; the part after mark
+
+ ;; cut tail from buffer-undo-list temporarily by direct
+ ;; manipulation with pointers in buffer-undo-list
+ (setcdr tmp nil)
+
+ (setq buffer-undo-list (delq nil buffer-undo-list))
+ (setq buffer-undo-list
+ (delq vip-buffer-undo-list-mark buffer-undo-list))
+ ;; restore tail of buffer-undo-list
+ (setq buffer-undo-list (nconc buffer-undo-list tmp2)))
+ (setq buffer-undo-list (delq nil buffer-undo-list))))))
+
+
+(defun vip-set-complex-command-for-undo ()
+ (if (listp buffer-undo-list)
+ (if (not vip-undo-needs-adjustment)
+ (let ((inhibit-quit t))
+ (setq buffer-undo-list
+ (cons vip-buffer-undo-list-mark buffer-undo-list))
+ (setq vip-undo-needs-adjustment t)))))
+
+
+
+
+(defun vip-display-current-destructive-command ()
+ (let ((text (nth 4 vip-d-com))
+ (keys (nth 5 vip-d-com))
+ (max-text-len 30))
+
+ (setq this-command 'vip-display-current-destructive-command)
+
+ (message " `.' runs %s%s"
+ (concat "`" (vip-array-to-string keys) "'")
+ (vip-abbreviate-string text max-text-len
+ " inserting `" "'" " ......."))
+ ))
+
+
+;; don't change vip-d-com if it was vip-repeat command invoked with `.'
+;; or in some other way (non-interactively).
+(defun vip-set-destructive-command (list)
+ (or (eq vip-intermediate-command 'vip-repeat)
+ (progn
+ (setq vip-d-com list)
+ (setcar (nthcdr 5 vip-d-com)
+ (vip-array-to-string (this-command-keys)))
+ (vip-push-onto-ring vip-d-com 'vip-command-ring))))
+
+(defun vip-prev-destructive-command (next)
+ "Find previous destructive command in the history of destructive commands.
+With prefix argument, find next destructive command."
+ (interactive "P")
+ (let (cmd vip-intermediate-command)
+ (if (eq last-command 'vip-display-current-destructive-command)
+ ;; repeated search through command history
+ (setq vip-intermediate-command 'repeating-display-destructive-command)
+ ;; first search through command history--set temp ring
+ (setq vip-temp-command-ring (copy-list vip-command-ring)))
+ (setq cmd (if next
+ (vip-special-ring-rotate1 vip-temp-command-ring 1)
+ (vip-special-ring-rotate1 vip-temp-command-ring -1)))
+ (if (null cmd)
+ ()
+ (setq vip-d-com cmd))
+ (vip-display-current-destructive-command)))
+
+(defun vip-next-destructive-command ()
+ "Find next destructive command in the history of destructive commands."
+ (interactive)
+ (vip-prev-destructive-command 'next))
+
+(defun vip-insert-prev-from-insertion-ring (arg)
+ "Cycles through insertion ring in the direction of older insertions.
+Undoes previous insertion and inserts new.
+With prefix argument, cycles in the direction of newer elements.
+In minibuffer, this command executes whatever the invocation key is bound
+to in the global map, instead of cycling through the insertion ring."
+ (interactive "P")
+ (let (vip-intermediate-command)
+ (if (eq last-command 'vip-insert-from-insertion-ring)
+ (progn ; repeated search through insertion history
+ (setq vip-intermediate-command 'repeating-insertion-from-ring)
+ (if (eq vip-current-state 'replace-state)
+ (undo 1)
+ (if vip-last-inserted-string-from-insertion-ring
+ (backward-delete-char
+ (length vip-last-inserted-string-from-insertion-ring))))
+ )
+ ;;first search through insertion history
+ (setq vip-temp-insertion-ring (copy-list vip-insertion-ring)))
+ (setq this-command 'vip-insert-from-insertion-ring)
+ ;; so that things will be undone properly
+ (setq buffer-undo-list (cons nil buffer-undo-list))
+ (setq vip-last-inserted-string-from-insertion-ring
+ (vip-special-ring-rotate1 vip-temp-insertion-ring (if arg 1 -1)))
+
+ ;; this change of vip-intermediate-command must come after
+ ;; vip-special-ring-rotate1, so that the ring will rotate, but before the
+ ;; insertion.
+ (setq vip-intermediate-command nil)
+ (if vip-last-inserted-string-from-insertion-ring
+ (insert vip-last-inserted-string-from-insertion-ring))
+ ))
+
+(defun vip-insert-next-from-insertion-ring ()
+ "Cycles through insertion ring in the direction of older insertions. Undoes previous insertion and inserts new."
+ (interactive)
+ (vip-insert-prev-from-insertion-ring 'next))
+
+\f
+;; some region utilities
+
+(defun vip-add-newline-at-eob-if-necessary ()
+ "If at the last line of buffer, add \\n before eob, if newline is missing."
+ (save-excursion
+ (end-of-line)
+ ;; make sure all lines end with newline, unless in the minibuffer or
+ ;; when requested otherwise (vip-add-newline-at-eob is nil)
+ (if (and
+ (eobp)
+ (not (bolp))
+ vip-add-newline-at-eob
+ (not (vip-is-in-minibuffer)))
+ (insert "\n"))))
+
+(defun vip-yank-defun ()
+ (mark-defun)
+ (copy-region-as-kill (point) (mark t)))
+
+(defun vip-enlarge-region (beg end)
+ "Enlarge region between BEG and END."
+ (or beg (setq beg end)) ; if beg is nil, set to end
+ (or end (setq end beg)) ; if end is nil, set to beg
+
+ (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))) (forward-line 1))
+ (if (not (eobp)) (beginning-of-line))
+ (if (> beg end) (exchange-point-and-mark)))
+
+
+(defun vip-quote-region ()
+ "Quote region by each line with a user supplied string."
+ (setq vip-quote-string
+ (vip-read-string-with-history
+ "Quote string: "
+ nil
+ 'vip-quote-region-history
+ vip-quote-string))
+ (vip-enlarge-region (point) (mark t))
+ (if (> (point) (mark t)) (exchange-point-and-mark))
+ (insert vip-quote-string)
+ (beginning-of-line)
+ (forward-line 1)
+ (while (and (< (point) (mark t)) (bolp))
+ (insert vip-quote-string)
+ (beginning-of-line)
+ (forward-line 1)))
+
+
+;; Tells whether BEG is on the same line as END.
+;; If one of the args is nil, it'll return nil.
+(defun vip-same-line (beg end)
+ (let ((selective-display nil))
+ (cond ((and beg end)
+ ;; This 'if' is needed because Emacs treats the next empty line
+ ;; as part of the previous line.
+ (if (or (> beg (point-max)) (> end (point-max))) ; out of range
+ ()
+ (if (and (> end beg) (= (vip-line-pos 'start) end))
+ (setq end (min (1+ end) (point-max))))
+ (if (and (> beg end) (= (vip-line-pos 'start) beg))
+ (setq beg (min (1+ beg) (point-max))))
+ (<= (count-lines beg end) 1) ))
+
+ (t nil))
+ ))
+
+
+;; Check if the string ends with a newline.
+(defun vip-end-with-a-newline-p (string)
+ (or (string= string "")
+ (= (vip-seq-last-elt string) ?\n)))
+
+(defun vip-tmp-insert-at-eob (msg)
+ (let ((savemax (point-max)))
+ (goto-char savemax)
+ (insert msg)
+ (sit-for 2)
+ (goto-char savemax) (delete-region (point) (point-max))
+ ))
+
+
+\f
+;;; Minibuffer business
+
+(defsubst vip-set-minibuffer-style ()
+ (add-hook 'minibuffer-setup-hook 'vip-minibuffer-setup-sentinel))
+
+
+(defun vip-minibuffer-setup-sentinel ()
+ (let ((hook (if vip-vi-style-in-minibuffer
+ 'vip-change-state-to-insert
+ 'vip-change-state-to-emacs)))
+ (funcall hook)
+
+ ;; Make sure the minibufer overlay is kept up-to-date. In XEmacs also
+ ;; guards against the possibility of detaching this overlay.
+ (add-hook 'vip-post-command-hooks 'vip-move-minibuffer-overlay)
+ ))
+
+;; Interpret last event in the local map
+(defun vip-exit-minibuffer ()
+ (interactive)
+ (let (command)
+ (setq command (local-key-binding (char-to-string last-command-char)))
+ (if command
+ (command-execute command)
+ (exit-minibuffer))))
+
+
+(defun vip-set-search-face ()
+ (if (not window-system)
+ ()
+ (defvar vip-search-face
+ (progn
+ (make-face 'vip-search-face)
+ (or (face-differs-from-default-p 'vip-search-face)
+ ;; face wasn't set in .vip or .Xdefaults
+ (if (vip-can-use-colors "Black" "khaki")
+ (progn
+ (set-face-background 'vip-search-face "khaki")
+ (set-face-foreground 'vip-search-face "Black"))
+ (copy-face 'italic 'vip-search-face)
+ (set-face-underline-p 'vip-search-face t)))
+ 'vip-search-face)
+ "*Face used to flash out the search pattern.")
+ ))
+
+
+(defun vip-set-minibuffer-faces ()
+ (if (not window-system)
+ ()
+ (defvar vip-minibuffer-emacs-face
+ (progn
+ (make-face 'vip-minibuffer-emacs-face)
+ (or (face-differs-from-default-p 'vip-minibuffer-emacs-face)
+ ;; face wasn't set in .vip or .Xdefaults
+ (if vip-vi-style-in-minibuffer
+ ;; emacs state is an exception in the minibuffer
+ (if (vip-can-use-colors "darkseagreen2" "Black")
+ (progn
+ (set-face-background
+ 'vip-minibuffer-emacs-face "darkseagreen2")
+ (set-face-foreground
+ 'vip-minibuffer-emacs-face "Black"))
+ (copy-face 'highlight 'vip-minibuffer-emacs-face))
+ ;; emacs state is the main state in the minibuffer
+ (if (vip-can-use-colors "Black" "pink")
+ (progn
+ (set-face-background 'vip-minibuffer-emacs-face "pink")
+ (set-face-foreground
+ 'vip-minibuffer-emacs-face "Black"))
+ (copy-face 'italic 'vip-minibuffer-emacs-face))
+ ))
+ 'vip-minibuffer-emacs-face)
+ "Face used in the Minibuffer when it is in Emacs state.")
+
+ (defvar vip-minibuffer-insert-face
+ (progn
+ (make-face 'vip-minibuffer-insert-face)
+ (or (face-differs-from-default-p 'vip-minibuffer-insert-face)
+ (if vip-vi-style-in-minibuffer
+ (if (vip-can-use-colors "Black" "pink")
+ (progn
+ (set-face-background 'vip-minibuffer-insert-face "pink")
+ (set-face-foreground
+ 'vip-minibuffer-insert-face "Black"))
+ (copy-face 'italic 'vip-minibuffer-insert-face))
+ ;; If Insert state is an exception
+ (if (vip-can-use-colors "darkseagreen2" "Black")
+ (progn
+ (set-face-background
+ 'vip-minibuffer-insert-face "darkseagreen2")
+ (set-face-foreground
+ 'vip-minibuffer-insert-face "Black"))
+ (copy-face 'highlight 'vip-minibuffer-insert-face))
+ (vip-italicize-face 'vip-minibuffer-insert-face)))
+ 'vip-minibuffer-insert-face)
+ "Face used in the Minibuffer when it is in Insert state.")
+
+ (defvar vip-minibuffer-vi-face
+ (progn
+ (make-face 'vip-minibuffer-vi-face)
+ (or (face-differs-from-default-p 'vip-minibuffer-vi-face)
+ (if vip-vi-style-in-minibuffer
+ (if (vip-can-use-colors "Black" "grey")
+ (progn
+ (set-face-background 'vip-minibuffer-vi-face "grey")
+ (set-face-foreground 'vip-minibuffer-vi-face "Black"))
+ (copy-face 'bold 'vip-minibuffer-vi-face))
+ (copy-face 'bold 'vip-minibuffer-vi-face)
+ (invert-face 'vip-minibuffer-vi-face)))
+ 'vip-minibuffer-vi-face)
+ "Face used in the Minibuffer when it is in Vi state.")
+
+ ;; the current face used in the minibuffer
+ (vip-deflocalvar vip-minibuffer-current-face vip-minibuffer-emacs-face "")
+ ))
+
+
+\f
+;;; Reading string with history
+
+(defun vip-read-string-with-history (prompt &optional initial
+ history-var default keymap)
+ ;; Reads string, prompting with PROMPT and inserting the INITIAL
+ ;; value. Uses HISTORY-VAR. DEFAULT is the default value to accept if the
+ ;; input is an empty string. Uses KEYMAP, if given, or the
+ ;; minibuffer-local-map.
+ ;; Default value is displayed until the user types something in the
+ ;; minibuffer.
+ (let ((minibuffer-setup-hook
+ '(lambda ()
+ (if (stringp initial)
+ (progn
+ (sit-for 840)
+ (erase-buffer)
+ (insert initial)))
+ (vip-minibuffer-setup-sentinel)))
+ (val "")
+ (padding "")
+ temp-msg)
+
+ (setq keymap (or keymap minibuffer-local-map)
+ initial (or initial "")
+ temp-msg (if default
+ (format "(default: %s) " default)
+ ""))
+
+ (setq vip-incomplete-ex-cmd nil)
+ (setq val (read-from-minibuffer prompt
+ (concat temp-msg initial val padding)
+ keymap nil history-var))
+ (setq minibuffer-setup-hook nil
+ padding (vip-array-to-string (this-command-keys))
+ temp-msg "")
+ ;; the following overcomes a glaring bug in history handling
+ ;; in XEmacs 19.11
+ (if (not (string= val (car (eval history-var))))
+ (set history-var (cons val (eval history-var))))
+ (if (or (string= (nth 0 (eval history-var)) (nth 1 (eval history-var)))
+ (string= (nth 0 (eval history-var)) ""))
+ (set history-var (cdr (eval history-var))))
+ (if (string= val "")
+ (or default "")
+ val)))
+
+
+\f
+;; insertion commands
+
+;; Called when state changes from Insert Vi command mode.
+;; Repeats the insertion command if Insert state was entered with prefix
+;; argument > 1.
+(defun vip-repeat-insert-command ()
+ (let ((i-com (car vip-d-com))
+ (val (nth 1 vip-d-com))
+ (char (nth 2 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 nil nil nil))
+ (vip-repeat nil)
+ (setq vip-d-com (list i-com val char nil nil nil))
+ ))))
+
+(defun vip-insert (arg)
+ "Insert before point."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command (list 'vip-insert val ?r nil nil nil))
+ (if com
+ (vip-loop val (vip-yank-last-insertion))
+ (vip-change-state-to-insert))))
+
+(defun vip-append (arg)
+ "Append after point."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command (list 'vip-append val ?r nil nil nil))
+ (if (not (eolp)) (forward-char))
+ (if (equal com ?r)
+ (vip-loop val (vip-yank-last-insertion))
+ (vip-change-state-to-insert))))
+
+(defun vip-Append (arg)
+ "Append at end of line."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command (list 'vip-Append val ?r nil nil nil))
+ (end-of-line)
+ (if (equal com ?r)
+ (vip-loop val (vip-yank-last-insertion))
+ (vip-change-state-to-insert))))
+
+(defun vip-Insert (arg)
+ "Insert before first non-white."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command (list 'vip-Insert val ?r nil nil nil))
+ (back-to-indentation)
+ (if (equal com ?r)
+ (vip-loop val (vip-yank-last-insertion))
+ (vip-change-state-to-insert))))
+
+(defun vip-open-line (arg)
+ "Open line below."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command (list 'vip-open-line val ?r nil nil nil))
+ (let ((col (current-indentation)))
+ (if (equal com ?r)
+ (vip-loop val
+ (progn
+ (end-of-line)
+ (newline 1)
+ (if vip-auto-indent
+ (progn (setq vip-cted t) (indent-to col)))
+ (vip-yank-last-insertion)))
+ (end-of-line)
+ (newline 1)
+ (if vip-auto-indent (progn (setq vip-cted t) (indent-to col)))
+ (vip-change-state-to-insert)
+ ))))
+
+(defun vip-Open-line (arg)
+ "Open line above."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command (list 'vip-Open-line val ?r nil nil nil))
+ (let ((col (current-indentation)))
+ (if (equal com ?r)
+ (vip-loop val
+ (progn
+ (beginning-of-line)
+ (open-line 1)
+ (if vip-auto-indent
+ (progn (setq vip-cted t) (indent-to col)))
+ (vip-yank-last-insertion)))
+ (beginning-of-line)
+ (open-line 1)
+ (if vip-auto-indent (progn (setq vip-cted t) (indent-to col)))
+ (vip-change-state-to-insert)))))
+
+(defun vip-open-line-at-point (arg)
+ "Open line at point."
+ (interactive "P")
+ (vip-set-complex-command-for-undo)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-set-destructive-command
+ (list 'vip-open-line-at-point val ?r nil nil nil))
+ (if (equal com ?r)
+ (vip-loop val
+ (progn
+ (open-line 1)
+ (vip-yank-last-insertion)))
+ (open-line 1)
+ (vip-change-state-to-insert))))
+
+(defun vip-substitute (arg)
+ "Substitute characters."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (push-mark nil t)
+ (forward-char val)
+ (if (equal com ?r)
+ (vip-change-subr (mark t) (point))
+ (vip-change (mark t) (point)))
+ (vip-set-destructive-command (list 'vip-substitute val ?r nil nil nil))
+ ))
+
+(defun vip-substitute-line (arg)
+ "Substitute lines."
+ (interactive "p")
+ (vip-set-complex-command-for-undo)
+ (vip-line (cons arg ?C)))
+
+;; Prepare for replace
+(defun vip-start-replace ()
+ (setq vip-began-as-replace t
+ vip-sitting-in-replace t
+ vip-replace-chars-to-delete 0
+ vip-replace-chars-deleted 0)
+ (add-hook 'vip-after-change-functions 'vip-replace-mode-spy-after t)
+ (add-hook 'vip-before-change-functions 'vip-replace-mode-spy-before t)
+ ;; this will get added repeatedly, but no harm
+ (add-hook 'after-change-functions 'vip-after-change-sentinel t)
+ (add-hook 'before-change-functions 'vip-before-change-sentinel t)
+ (vip-move-marker-locally 'vip-last-posn-in-replace-region
+ (vip-replace-start))
+ (add-hook 'vip-post-command-hooks 'vip-replace-state-post-command-sentinel t)
+ (add-hook 'vip-pre-command-hooks 'vip-replace-state-pre-command-sentinel t)
+ )
+
+;; Runs vip-after-change-functions inside after-change-functions
+(defun vip-after-change-sentinel (beg end len)
+ (let ((list vip-after-change-functions))
+ (while list
+ (funcall (car list) beg end len)
+ (setq list (cdr list)))))
+
+;; Runs vip-before-change-functions inside before-change-functions
+(defun vip-before-change-sentinel (beg end)
+ (let ((list vip-before-change-functions))
+ (while list
+ (funcall (car list) beg end)
+ (setq list (cdr list)))))
+
+(defun vip-post-command-sentinel ()
+ (run-hooks 'vip-post-command-hooks))
+
+(defun vip-pre-command-sentinel ()
+ (run-hooks 'vip-pre-command-hooks))
+
+;; Needed so that Viper will be able to figure the last inserted
+;; chunk of text with reasonable accuracy.
+(defun vip-insert-state-post-command-sentinel ()
+ (if (and (memq vip-current-state '(insert-state replace-state))
+ vip-insert-point
+ (>= (point) vip-insert-point))
+ (setq vip-last-posn-while-in-insert-state (point-marker)))
+ (if (and (eq this-command 'dabbrev-expand)
+ (integerp vip-pre-command-point)
+ (> vip-insert-point vip-pre-command-point))
+ (move-marker vip-insert-point vip-pre-command-point))
+ )
+
+(defun vip-insert-state-pre-command-sentinel ()
+ (if (and (eq this-command 'dabbrev-expand)
+ (markerp vip-insert-point)
+ (marker-position vip-insert-point))
+ (setq vip-pre-command-point (marker-position vip-insert-point))))
+
+(defun vip-R-state-post-command-sentinel ()
+ ;; This is needed despite vip-replace-state-pre-command-sentinel
+ ;; When you jump to another buffer in another frame, the pre-command
+ ;; hook won't change cursor color to default in that other frame.
+ ;; So, if the second frame cursor was red and we set the point
+ ;; outside the replacement region, then the cursor color woll remain
+ ;; red. Restoring the default, below, prevents this.
+ (vip-restore-cursor-color)
+ (if (and (<= (vip-replace-start) (point))
+ (<= (point) (vip-replace-end)))
+ (vip-change-cursor-color vip-replace-overlay-cursor-color)))
+
+(defun vip-replace-state-pre-command-sentinel ()
+ (vip-restore-cursor-color))
+
+(defun vip-replace-state-post-command-sentinel ()
+ ;; This is needed despite vip-replace-state-pre-command-sentinel
+ ;; When you jump to another buffer in another frame, the pre-command
+ ;; hook won't change cursor color to default in that other frame.
+ ;; So, if the second frame cursor was red and we set the point
+ ;; outside the replacement region, then the cursor color woll remain
+ ;; red. Restoring the default, below, prevents this.
+ (vip-restore-cursor-color)
+ (cond
+ ((eq vip-current-state 'replace-state)
+ ;; delete characters to compensate for inserted chars.
+ (let ((replace-boundary
+ ;; distinguish empty repl-reg-end-symbol from non-empty
+ (- (vip-replace-end)
+ (if (eq (length vip-replace-region-end-symbol) 0)
+ 0 1)))
+ )
+
+ (save-excursion
+ (goto-char vip-last-posn-in-replace-region)
+ (delete-char vip-replace-chars-to-delete)
+ (setq vip-replace-chars-to-delete 0
+ vip-replace-chars-deleted 0)
+ ;; terminate replace mode if reached replace limit
+ (if (= vip-last-posn-in-replace-region
+ (vip-replace-end))
+ (vip-finish-change vip-last-posn-in-replace-region)))
+
+ (if (and (<= (vip-replace-start) (point))
+ (<= (point) replace-boundary))
+ (progn
+ ;; the state may have changed in vip-finish-change above
+ (if (eq vip-current-state 'replace-state)
+ (vip-change-cursor-color vip-replace-overlay-cursor-color))
+ (setq vip-last-posn-in-replace-region (point-marker))))
+ ))
+
+ (t ;; terminate replace mode if changed Viper states.
+ (vip-finish-change vip-last-posn-in-replace-region)))
+ )
+
+
+;; checks how many chars were deleted by the last change
+(defun vip-replace-mode-spy-before (beg end)
+ (setq vip-replace-chars-deleted (- end beg
+ (max 0 (- end (vip-replace-end)))
+ (max 0 (- (vip-replace-start) beg))
+ ))
+ )
+
+;; Invoked as an after-change-function to set up parameters of the last change
+(defun vip-replace-mode-spy-after (beg end length)
+ (if (memq vip-intermediate-command '(repeating-insertion-from-ring))
+ (progn
+ (setq vip-replace-chars-to-delete 0)
+ (vip-move-marker-locally
+ 'vip-last-posn-in-replace-region (point)))
+
+ (let (beg-col end-col real-end chars-to-delete)
+ (setq real-end (min end (vip-replace-end)))
+ (save-excursion
+ (goto-char beg)
+ (setq beg-col (current-column))
+ (goto-char real-end)
+ (setq end-col (current-column)))
+
+ ;; If beg of change is outside the replacement region, then don't
+ ;; delete anything in the repl region (set chars-to-delete to 0).
+ ;;
+ ;; This works fine except that we have to take special care of
+ ;; dabbrev-expand. The problem stems from new-dabbrev.el, which
+ ;; sometimes simply shifts the repl region rightwards, without
+ ;; deleting an equal amount of characters.
+ ;;
+ ;; The reason why new-dabbrev.el causes this are this:
+ ;; if one dinamically completes a partial word that starts before the
+ ;; replacement region (but ends inside)then new-dabbrev.el first
+ ;; moves cursor backwards, to the beginning of the word to be
+ ;; completed (say, pt A). Then it inserts the
+ ;; completed word and then deletes the old, incomplete part.
+ ;; Since the complete word is inserted at position before the repl
+ ;; region, the next If-statement would have set chars-to-delete to 0
+ ;; unless we check for the current command, which must be
+ ;; dabbrev-expand.
+ ;;
+ ;; We should be able deal with these problems in a better way
+ ;; when emacs will have overlays with sticky back ends.
+ ;; In fact, it would be also useful to add overlays for insert
+ ;; regions as well, since this will let us capture the situation when
+ ;; dabbrev-expand goes back past the insertion point to find the
+ ;; beginning of the word to be expanded.
+ (if (or (and (<= (vip-replace-start) beg)
+ (<= beg (vip-replace-end)))
+ (and (= length 0) (eq this-command 'dabbrev-expand)))
+ (setq chars-to-delete
+ (max (- end-col beg-col) (- real-end beg) 0))
+ (setq chars-to-delete 0))
+
+ ;; if beg = last change position, it means that we are within the
+ ;; same command that does multiple changes. Moreover, it means
+ ;; that we have two subsequent changes (insert/delete) that
+ ;; complement each other.
+ (if (= beg (marker-position vip-last-posn-in-replace-region))
+ (setq vip-replace-chars-to-delete
+ (- (+ chars-to-delete vip-replace-chars-to-delete)
+ vip-replace-chars-deleted))
+ (setq vip-replace-chars-to-delete chars-to-delete))
+
+ (vip-move-marker-locally
+ 'vip-last-posn-in-replace-region
+ (max (if (> end (vip-replace-end)) (vip-replace-start) end)
+ (or (marker-position vip-last-posn-in-replace-region)
+ (vip-replace-start))
+ ))
+
+ (setq vip-replace-chars-to-delete
+ (max 0 (min vip-replace-chars-to-delete
+ (- (vip-replace-end)
+ vip-last-posn-in-replace-region))))
+ )))
+
+
+;; Delete stuff between posn and the end of vip-replace-overlay-marker, if
+;; posn is within the overlay.
+(defun vip-finish-change (posn)
+ (remove-hook 'vip-after-change-functions 'vip-replace-mode-spy-after)
+ (remove-hook 'vip-before-change-functions 'vip-replace-mode-spy-before)
+ (remove-hook 'vip-post-command-hooks
+ 'vip-replace-state-post-command-sentinel)
+ (remove-hook 'vip-pre-command-hooks 'vip-replace-state-pre-command-sentinel)
+ (vip-restore-cursor-color)
+ (setq vip-sitting-in-replace nil) ; just in case we'll need to know it
+ (save-excursion
+ (if (and
+ vip-replace-overlay
+ (>= posn (vip-replace-start))
+ (< posn (vip-replace-end)))
+ (delete-region posn (vip-replace-end)))
+ )
+
+ (if (eq vip-current-state 'replace-state)
+ (vip-downgrade-to-insert))
+ ;; replace mode ended => nullify vip-last-posn-in-replace-region
+ (vip-move-marker-locally 'vip-last-posn-in-replace-region nil)
+ (vip-hide-replace-overlay)
+ (vip-refresh-mode-line)
+ (vip-put-string-on-kill-ring vip-last-replace-region)
+ )
+
+(defun vip-put-string-on-kill-ring (string)
+ "Make STRING be the first element of the kill ring."
+ (setq kill-ring (cons string kill-ring))
+ (if (> (length kill-ring) kill-ring-max)
+ (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))
+ (setq kill-ring-yank-pointer kill-ring))
+
+(defun vip-finish-R-mode ()
+ (remove-hook 'vip-post-command-hooks 'vip-R-state-post-command-sentinel)
+ (remove-hook 'vip-pre-command-hooks 'vip-replace-state-pre-command-sentinel)
+ (vip-downgrade-to-insert))
+
+(defun vip-start-R-mode ()
+ ;; Leave arg as 1, not t: XEmacs insists that it must be a pos number
+ (overwrite-mode 1)
+ (add-hook 'vip-post-command-hooks 'vip-R-state-post-command-sentinel t)
+ (add-hook 'vip-pre-command-hooks 'vip-replace-state-pre-command-sentinel t)
+ )
+
+
+
+(defun vip-replace-state-exit-cmd ()
+ "Binding for keys that cause Replace state to switch to Vi or to Insert.
+These keys are ESC, RET, and LineFeed"
+ (interactive)
+ (if overwrite-mode ;; If you are in replace mode invoked via 'R'
+ (vip-finish-R-mode)
+ (vip-finish-change vip-last-posn-in-replace-region))
+ (let (com)
+ (if (eq this-command 'vip-intercept-ESC-key)
+ (setq com 'vip-exit-insert-state)
+ (vip-set-unread-command-events last-input-char)
+ (setq com (key-binding (read-key-sequence nil))))
+
+ (condition-case conds
+ (command-execute com)
+ (error
+ (vip-message-conditions conds)))
+ )
+ (vip-hide-replace-overlay))
+
+
+(defun vip-overwrite (arg)
+"This is the function bound to 'R'---unlimited replace.
+Similar to Emacs's own overwrite-mode."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)) (len))
+ (vip-set-destructive-command (list 'vip-overwrite val ?r nil nil nil))
+ (if com
+ (progn
+ ;; Viper saves inserted text in vip-last-insertion
+ (setq len (length vip-last-insertion))
+ (delete-char len)
+ (vip-loop val (vip-yank-last-insertion)))
+ (setq last-command 'vip-overwrite)
+ (vip-set-complex-command-for-undo)
+ (vip-set-replace-overlay (point) (vip-line-pos 'end))
+ (vip-change-state-to-replace)
+ )))
+
+\f
+;; line commands
+
+(defun vip-line (arg)
+ (let ((val (car arg))
+ (com (cdr arg)))
+ (vip-move-marker-locally 'vip-com-point (point))
+ (if (not (eobp))
+ (next-line (1- val)))
+ ;; this ensures that dd, cc, D, yy will do the right thing on the last
+ ;; line of buffer when this line has no \n.
+ (vip-add-newline-at-eob-if-necessary)
+ (vip-execute-com 'vip-line val com))
+ (if (and (eobp) (not (bobp))) (forward-line -1))
+ )
+
+(defun vip-yank-line (arg)
+ "Yank ARG lines (in Vi's sense)."
+ (interactive "P")
+ (let ((val (vip-p-val arg)))
+ (vip-line (cons val ?Y))))
+
+\f
+;; region commands
+
+(defun vip-region (arg)
+ (interactive "P")
+ (let ((val (vip-P-val arg))
+ (com (vip-getcom arg)))
+ (vip-move-marker-locally 'vip-com-point (point))
+ (exchange-point-and-mark)
+ (vip-execute-com 'vip-region val com)))
+
+(defun vip-Region (arg)
+ (interactive "P")
+ (let ((val (vip-P-val arg))
+ (com (vip-getCom arg)))
+ (vip-move-marker-locally 'vip-com-point (point))
+ (exchange-point-and-mark)
+ (vip-execute-com 'vip-Region val com)))
+
+(defun vip-replace-char (arg)
+ "Replace the following ARG chars by the character read."
+ (interactive "P")
+ (if (and (eolp) (bolp)) (error "I see no character to replace here"))
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-replace-char-subr (if (equal com ?r) vip-d-char (read-char)) val)
+ (if (and (eolp) (not (bolp))) (forward-char 1))
+ (vip-set-destructive-command
+ (list 'vip-replace-char val ?r nil vip-d-char nil))
+ ))
+
+(defun vip-replace-char-subr (char arg)
+ (delete-char arg t)
+ (setq vip-d-char char)
+ (vip-loop (if (> arg 0) arg (- arg))
+ (if (eq char ?\C-m) (insert "\n") (insert char)))
+ (backward-char arg))
+
+(defun vip-replace-string ()
+ "The old replace string function.
+If you supply null string as the string to be replaced,
+the query replace mode will toggle between string replace and regexp replace.
+This function comes from VIP 3.5 and is not used in Viper. A nostalgic user
+can bind it to a key, if necessary."
+ (interactive)
+ (let (str)
+ (setq str (vip-read-string-with-history
+ (if vip-re-replace "Replace regexp: " "Replace string: ")
+ nil ; no initial
+ 'vip-replace1-history
+ (car vip-replace1-history) ; default
+ ))
+ (if (string= str "")
+ (progn
+ (setq vip-re-replace (not vip-re-replace))
+ (message (format "Replace mode changed to %s"
+ (if vip-re-replace "regexp replace"
+ "string replace"))))
+ (if vip-re-replace
+ (replace-regexp
+ str
+ (vip-read-string-with-history
+ (format "Replace regexp `%s' with: " str)
+ nil ; no initial
+ 'vip-replace2-history
+ (car vip-replace2-history) ; default
+ ))
+ (replace-string
+ str
+ (vip-read-string-with-history
+ (format "Replace `%s' with: " str)
+ nil ; no initial
+ 'vip-replace2-history
+ (car vip-replace2-history) ; default
+ )))
+ )))
+
+\f
+;; basic cursor movement. j, k, l, h commands.
+
+(defun vip-forward-char (arg)
+ "Move point right ARG characters (left if ARG negative).
+On reaching end of line, stop and signal error."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (if vip-ex-style-motion
+ (progn
+ ;; the boundary condition check gets weird here because
+ ;; forward-char may be the parameter of a delete, and 'dl' works
+ ;; just like 'x' for the last char on a line, so we have to allow
+ ;; the forward motion before the 'vip-execute-com', but, of
+ ;; course, 'dl' doesn't work on an empty line, so we have to
+ ;; catch that condition before 'vip-execute-com'
+ (if (and (eolp) (bolp)) (error "") (forward-char val))
+ (if com (vip-execute-com 'vip-forward-char val com))
+ (if (eolp) (progn (backward-char 1) (error ""))))
+ (forward-char val)
+ (if com (vip-execute-com 'vip-forward-char val com)))))
+
+(defun vip-backward-char (arg)
+ "Move point left ARG characters (right if ARG negative).
+On reaching beginning of line, stop and signal error."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (if vip-ex-style-motion
+ (progn
+ (if (bolp) (error "") (backward-char val))
+ (if com (vip-execute-com 'vip-backward-char val com)))
+ (backward-char val)
+ (if com (vip-execute-com 'vip-backward-char val com)))))
+
+(defun vip-forward-char-carefully (&optional arg)
+ "Like forward-char, but doesn't move at end of buffer."
+ (setq arg (or arg 1))
+ (if (>= (point-max) (+ (point) arg))
+ (forward-char arg)
+ (goto-char (point-max))))
+
+(defun vip-backward-char-carefully (&optional arg)
+ "Like backward-char, but doesn't move at end of buffer."
+ (setq arg (or arg 1))
+ (if (<= (point-min) (- (point) arg))
+ (backward-char arg)
+ (goto-char (point-min))))
+
+
+\f
+;;; Word command
+
+;; Words are formed from alpha's and nonalphas - <sp>,\t\n are separators
+;; for word movement. When executed with a destructive command, \n is
+;; usually left untouched for the last word.
+
+;; skip only one \n
+(defun vip-skip-separators (forward)
+ (if forward
+ (progn
+ (skip-chars-forward " \t")
+ (if (looking-at "\n")
+ (progn
+ (forward-char)
+ (skip-chars-forward " \t"))))
+ (skip-chars-backward " \t")
+ (backward-char)
+ (if (looking-at "\n")
+ (skip-chars-backward " \t")
+ (forward-char))))
+
+(defconst vip-ALPHA "a-zA-Z0-9_")
+(defconst vip-ALPHA-B (concat "[" vip-ALPHA "]"))
+(defconst vip-NONALPHA (concat "^" vip-ALPHA))
+(defconst vip-NONALPHA-B (concat "[" vip-NONALPHA "]"))
+(defconst vip-SEP " \t\n")
+(defconst vip-SEP-B (concat "[" vip-SEP "]"))
+(defconst vip-NONSEP (concat "^" vip-SEP))
+(defconst vip-NONSEP-B (concat "[" vip-NONSEP "]"))
+(defconst vip-ALPHASEP (concat vip-ALPHA vip-SEP))
+(defconst vip-ALPHASEP-B (concat "[" vip-ALPHASEP "]"))
+(defconst vip-NONALPHASEP (concat "^" vip-ALPHASEP ))
+(defconst vip-NONALPHASEP-B (concat "[" vip-NONALPHASEP "]"))
+
+
+(defun vip-forward-word-kernel (val)
+ (while (> val 0)
+ (cond ((looking-at vip-ALPHA-B)
+ (skip-chars-forward vip-ALPHA)
+ (vip-skip-separators t))
+ ((looking-at vip-SEP-B)
+ (vip-skip-separators t))
+ ((looking-at vip-NONALPHASEP-B)
+ (skip-chars-forward vip-NONALPHASEP)
+ (vip-skip-separators t)))
+ (setq val (1- val))))
+
+(defun vip-fwd-skip (pat aux-pat lim)
+ (if (and (save-excursion
+ (re-search-backward pat lim t))
+ (= (point) (match-end 0)))
+ (goto-char (match-beginning 0)))
+ (skip-chars-backward aux-pat lim)
+ (if (= (point) lim)
+ (vip-forward-char-carefully))
+ )
+
+
+(defun vip-forward-word (arg)
+ "Forward word."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-forward-word-kernel val)
+ (if com (progn
+ (cond ((memq com (list ?c (- ?c) ?y (- ?y)))
+ (vip-fwd-skip "\n[ \t]*" " \t" vip-com-point))
+ ((vip-dotable-command-p com)
+ (vip-fwd-skip "\n[ \t]*" "" vip-com-point)))
+ (vip-execute-com 'vip-forward-word val com)))))
+
+
+(defun vip-forward-Word (arg)
+ "Forward word delimited by white character."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-loop val
+ (progn
+ (skip-chars-forward vip-NONSEP)
+ (vip-skip-separators t)))
+ (if com (progn
+ (cond ((memq com (list ?c (- ?c) ?y (- ?y)))
+ (vip-fwd-skip "\n[ \t]*" " \t" vip-com-point))
+ ((vip-dotable-command-p com)
+ (vip-fwd-skip "\n[ \t]*" "" vip-com-point)))
+ (vip-execute-com 'vip-forward-Word val com)))))
+
+
+;; this is a bit different from Vi, but Vi's end of word
+;; makes no sense whatsoever
+(defun vip-end-of-word-kernel ()
+ (if (vip-end-of-word-p) (forward-char))
+ (if (looking-at "[ \t\n]")
+ (skip-chars-forward vip-SEP))
+
+ (cond ((looking-at vip-ALPHA-B) (skip-chars-forward vip-ALPHA))
+ ((looking-at vip-NONALPHASEP-B)
+ (skip-chars-forward vip-NONALPHASEP)))
+ (vip-backward-char-carefully))
+
+(defun vip-end-of-word-p ()
+ (if (eobp) t
+ (save-excursion
+ (cond ((looking-at vip-ALPHA-B)
+ (forward-char)
+ (looking-at vip-NONALPHA-B))
+ ((looking-at vip-NONALPHASEP-B)
+ (forward-char)
+ (looking-at vip-ALPHASEP-B))))))
+
+(defun vip-one-char-word-p ()
+ (let ((step 2))
+ (save-excursion
+ (cond ((looking-at vip-ALPHA-B)
+ (if (bobp) (setq step 1) (backward-char))
+ (if (or (bobp) (looking-at vip-NONALPHA-B))
+ (progn
+ (forward-char step)
+ (looking-at vip-NONALPHA-B))
+ nil))
+ ((looking-at vip-NONALPHASEP-B)
+ (if (bobp) (setq step 1) (backward-char))
+ (if (or (bobp) (looking-at vip-ALPHASEP-B))
+ (progn
+ (forward-char step)
+ (looking-at vip-ALPHASEP-B))
+ nil))))))
+
+(defun vip-one-char-Word-p ()
+ (and (looking-at vip-NONSEP-B)
+ (save-excursion
+ (if (bobp)
+ t
+ (backward-char)
+ (looking-at vip-SEP-B)))
+ (save-excursion
+ (forward-char)
+ (or (eobp)
+ (looking-at vip-SEP-B)))))
+
+(defun vip-end-of-word (arg &optional careful)
+ "Move point to end of current word."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-loop val (vip-end-of-word-kernel))
+ (if com
+ (progn
+ (forward-char)
+ (vip-execute-com 'vip-end-of-word val com)))))
+
+(defun vip-end-of-Word (arg)
+ "Forward to end of word delimited by white character."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-loop val
+ (progn
+ (vip-end-of-word-kernel)
+ (if (not (re-search-forward
+ vip-SEP-B nil t 1))
+ (goto-char (point-max)))
+ (skip-chars-backward vip-SEP)
+ (backward-char)))
+ (if com
+ (progn
+ (forward-char)
+ (vip-execute-com 'vip-end-of-Word val com)))))
+
+(defun vip-backward-word-kernel (val)
+ (while (> val 0)
+ (backward-char)
+ (cond ((looking-at vip-ALPHA-B)
+ (skip-chars-backward vip-ALPHA))
+ ((looking-at vip-SEP-B)
+ (forward-char)
+ (vip-skip-separators nil)
+ (backward-char)
+ (cond ((looking-at vip-ALPHA-B)
+ (skip-chars-backward vip-ALPHA))
+ ((looking-at vip-NONALPHASEP-B)
+ (skip-chars-backward vip-NONALPHASEP))
+ (t (forward-char))))
+ ((looking-at vip-NONALPHASEP-B)
+ (skip-chars-backward vip-NONALPHASEP)))
+ (setq val (1- val))))
+
+(defun vip-backward-word (arg)
+ "Backward word."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com
+ (let (i)
+ (if (setq i (save-excursion (backward-char) (looking-at "\n")))
+ (backward-char))
+ (vip-move-marker-locally 'vip-com-point (point))
+ (if i (forward-char))))
+ (vip-backward-word-kernel val)
+ (if com (vip-execute-com 'vip-backward-word val com))))
+
+(defun vip-backward-Word (arg)
+ "Backward word delimited by white character."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com
+ (let (i)
+ (if (setq i (save-excursion (backward-char) (looking-at "\n")))
+ (backward-char))
+ (vip-move-marker-locally 'vip-com-point (point))
+ (if i (forward-char))))
+ (vip-loop val
+ (progn
+ (vip-skip-separators nil)
+ (skip-chars-backward vip-NONSEP)))
+ (if com (vip-execute-com 'vip-backward-Word val com))))
+
+
+\f
+;; line commands
+
+(defun vip-beginning-of-line (arg)
+ "Go to beginning of line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (beginning-of-line val)
+ (if com (vip-execute-com 'vip-beginning-of-line val com))))
+
+(defun vip-bol-and-skip-white (arg)
+ "Beginning of line at first non-white character."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (forward-to-indentation (1- val))
+ (if com (vip-execute-com 'vip-bol-and-skip-white val com))))
+
+(defun vip-goto-eol (arg)
+ "Go to end of line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (end-of-line val)
+ (if com (vip-execute-com 'vip-goto-eol val com))
+ (if vip-ex-style-motion
+ (if (and (eolp) (not (bolp))
+ ;; a fix for vip-change-to-eol
+ (not (equal vip-current-state 'insert-state)))
+ (backward-char 1)
+ ))))
+
+
+(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 (vip-move-marker-locally 'vip-com-point (point)))
+ (beginning-of-line)
+ (forward-char (1- val))
+ (if com (vip-execute-com 'vip-goto-col val com))))
+
+
+(defun vip-next-line (arg)
+ "Go to next line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (next-line val)
+ (if vip-ex-style-motion
+ (if (and (eolp) (not (bolp))) (backward-char 1)))
+ (setq this-command 'next-line)
+ (if com (vip-execute-com 'vip-next-line val com))))
+
+(defun vip-next-line-at-bol (arg)
+ "Next line at beginning of line."
+ (interactive "P")
+ (save-excursion
+ (end-of-line)
+ (if (eobp) (error "Last line in buffer")))
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (forward-line val)
+ (back-to-indentation)
+ (if com (vip-execute-com 'vip-next-line-at-bol val com))))
+
+(defun vip-previous-line (arg)
+ "Go to previous line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (previous-line val)
+ (if vip-ex-style-motion
+ (if (and (eolp) (not (bolp))) (backward-char 1)))
+ (setq this-command 'previous-line)
+ (if com (vip-execute-com 'vip-previous-line val com))))
+
+
+(defun vip-previous-line-at-bol (arg)
+ "Previous line at beginning of line."
+ (interactive "P")
+ (save-excursion
+ (beginning-of-line)
+ (if (bobp) (error "First line in buffer")))
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (forward-line (- val))
+ (back-to-indentation)
+ (if com (vip-execute-com 'vip-previous-line val com))))
+
+(defun vip-change-to-eol (arg)
+ "Change to end of line."
+ (interactive "P")
+ (vip-goto-eol (cons arg ?c)))
+
+(defun vip-kill-line (arg)
+ "Delete line."
+ (interactive "P")
+ (vip-goto-eol (cons arg ?d)))
+
+(defun vip-erase-line (arg)
+ "Erase line."
+ (interactive "P")
+ (vip-beginning-of-line (cons arg ?d)))
+
+\f
+;; moving around
+
+(defun vip-goto-line (arg)
+ "Go to ARG's line. Without ARG go to end of buffer."
+ (interactive "P")
+ (let ((val (vip-P-val arg))
+ (com (vip-getCom arg)))
+ (vip-move-marker-locally 'vip-com-point (point))
+ (vip-deactivate-mark)
+ (push-mark nil t)
+ (if (null val)
+ (goto-char (point-max))
+ (goto-char (point-min))
+ (forward-line (1- val)))
+ (if (and (eobp) (bolp) (not (bobp))) (forward-line -1))
+ (back-to-indentation)
+ (if com (vip-execute-com 'vip-goto-line val com))))
+
+(defun vip-find-char (arg char forward offset)
+ "Find ARG's occurrence of CHAR on the current line.
+If FORWARD then search is forward, otherwise backward. OFFSET is used to
+adjust point after search."
+ (or (char-or-string-p char) (error ""))
+ (let ((arg (if forward arg (- arg)))
+ (cmd (if (eq vip-intermediate-command 'vip-repeat)
+ (nth 5 vip-d-com)
+ (vip-array-to-string (this-command-keys))))
+ point)
+ (save-excursion
+ (save-restriction
+ (if (> arg 0)
+ (narrow-to-region
+ ;; forward search begins here
+ (if (eolp) (error "Command `%s': At end of line" cmd) (point))
+ ;; forward search ends here
+ (progn (end-of-line) (point)))
+ (narrow-to-region
+ ;; backward search begins from here
+ (if (bolp)
+ (error "Command `%s': At beginning of line" cmd) (point))
+ ;; backward search ends here
+ (progn (beginning-of-line) (point))))
+ ;; if arg > 0, point is forwarded before search.
+ (if (> arg 0) (goto-char (1+ (point-min)))
+ (goto-char (point-max)))
+ (if (let ((case-fold-search nil))
+ (search-forward (char-to-string char) nil 0 arg))
+ (setq point (point))
+ (error "Command `%s': `%c' not found" cmd char))))
+ (goto-char (+ point (if (> arg 0) (if offset -2 -1) (if offset 1 0))))))
+
+(defun vip-find-char-forward (arg)
+ "Find char on the line.
+If called interactively read the char to find from the terminal, and if
+called from vip-repeat, the char last used is used. This behaviour is
+controlled by the sign of prefix numeric value."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if (> val 0)
+ ;; this means that the function was called interactively
+ (setq vip-f-char (read-char)
+ vip-f-forward t
+ vip-f-offset nil)
+ ;; vip-repeat --- set vip-F-char from command-keys
+ (setq vip-F-char (if (stringp (nth 5 vip-d-com))
+ (vip-seq-last-elt (nth 5 vip-d-com))
+ vip-F-char)
+ vip-f-char vip-F-char)
+ (setq val (- val)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-find-char val (if (> (vip-p-val arg) 0) vip-f-char vip-F-char) t nil)
+ (setq val (- val))
+ (if com
+ (progn
+ (setq vip-F-char vip-f-char) ; set new vip-F-char
+ (forward-char)
+ (vip-execute-com 'vip-find-char-forward val com)))))
+
+(defun vip-goto-char-forward (arg)
+ "Go up to char ARG forward on line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if (> val 0)
+ ;; this means that the function was called interactively
+ (setq vip-f-char (read-char)
+ vip-f-forward t
+ vip-f-offset t)
+ ;; vip-repeat --- set vip-F-char from command-keys
+ (setq vip-F-char (if (stringp (nth 5 vip-d-com))
+ (vip-seq-last-elt (nth 5 vip-d-com))
+ vip-F-char)
+ vip-f-char vip-F-char)
+ (setq val (- val)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-find-char val (if (> (vip-p-val arg) 0) vip-f-char vip-F-char) t t)
+ (setq val (- val))
+ (if com
+ (progn
+ (setq vip-F-char vip-f-char) ; set new vip-F-char
+ (forward-char)
+ (vip-execute-com 'vip-goto-char-forward val com)))))
+
+(defun vip-find-char-backward (arg)
+ "Find char ARG on line backward."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if (> val 0)
+ ;; this means that the function was called interactively
+ (setq vip-f-char (read-char)
+ vip-f-forward nil
+ vip-f-offset nil)
+ ;; vip-repeat --- set vip-F-char from command-keys
+ (setq vip-F-char (if (stringp (nth 5 vip-d-com))
+ (vip-seq-last-elt (nth 5 vip-d-com))
+ vip-F-char)
+ vip-f-char vip-F-char)
+ (setq val (- val)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-find-char
+ val (if (> (vip-p-val arg) 0) vip-f-char vip-F-char) nil nil)
+ (setq val (- val))
+ (if com
+ (progn
+ (setq vip-F-char vip-f-char) ; set new vip-F-char
+ (vip-execute-com 'vip-find-char-backward val com)))))
+
+(defun vip-goto-char-backward (arg)
+ "Go up to char ARG backward on line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if (> val 0)
+ ;; this means that the function was called interactively
+ (setq vip-f-char (read-char)
+ vip-f-forward nil
+ vip-f-offset t)
+ ;; vip-repeat --- set vip-F-char from command-keys
+ (setq vip-F-char (if (stringp (nth 5 vip-d-com))
+ (vip-seq-last-elt (nth 5 vip-d-com))
+ vip-F-char)
+ vip-f-char vip-F-char)
+ (setq val (- val)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-find-char val (if (> (vip-p-val arg) 0) vip-f-char vip-F-char) nil t)
+ (setq val (- val))
+ (if com
+ (progn
+ (setq vip-F-char vip-f-char) ; set new vip-F-char
+ (vip-execute-com 'vip-goto-char-backward val com)))))
+
+(defun vip-repeat-find (arg)
+ "Repeat previous find command."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-deactivate-mark)
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-find-char val vip-f-char vip-f-forward vip-f-offset)
+ (if com
+ (progn
+ (if vip-f-forward (forward-char))
+ (vip-execute-com 'vip-repeat-find val com)))))
+
+(defun vip-repeat-find-opposite (arg)
+ "Repeat previous find command in the opposite direction."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (vip-deactivate-mark)
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (vip-find-char val vip-f-char (not vip-f-forward) vip-f-offset)
+ (if com
+ (progn
+ (if vip-f-forward (forward-char))
+ (vip-execute-com 'vip-repeat-find-opposite val com)))))
+
+\f
+;; window scrolling etc.
+
+(defun vip-other-window (arg)
+ "Switch to other window."
+ (interactive "p")
+ (other-window arg)
+ (or (not (eq vip-current-state 'emacs-state))
+ (string= (buffer-name (current-buffer)) " *Minibuf-1*")
+ (vip-change-state-to-vi)))
+
+(defun vip-window-top (arg)
+ "Go to home window line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (push-mark nil t)
+ (move-to-window-line (1- val))
+ (if (not com) (back-to-indentation))
+ (if com (vip-execute-com 'vip-window-top val com))))
+
+(defun vip-window-middle (arg)
+ "Go to middle window line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (push-mark nil t)
+ (move-to-window-line (+ (/ (1- (window-height)) 2) (1- val)))
+ (if (not com) (back-to-indentation))
+ (if com (vip-execute-com 'vip-window-middle val com))))
+
+(defun vip-window-bottom (arg)
+ "Go to last window line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (push-mark nil t)
+ (move-to-window-line (- val))
+ (if (not com) (back-to-indentation))
+ (if com (vip-execute-com 'vip-window-bottom val com))))
+
+(defun vip-line-to-top (arg)
+ "Put current line on the home line."
+ (interactive "p")
+ (recenter (1- arg)))
+
+(defun vip-line-to-middle (arg)
+ "Put current line on the middle line."
+ (interactive "p")
+ (recenter (+ (1- arg) (/ (1- (window-height)) 2))))
+
+(defun vip-line-to-bottom (arg)
+ "Put current line on the last line."
+ (interactive "p")
+ (recenter (- (window-height) (1+ arg))))
+
+\f
+;; paren match
+;; must correct this to only match ( to ) etc. On the other hand
+;; it is good that paren match gets confused, because that way you
+;; catch _all_ imbalances.
+
+(defun vip-paren-match (arg)
+ "Go to the matching parenthesis."
+ (interactive "P")
+ (let ((com (vip-getcom arg)))
+ (if (numberp arg)
+ (if (or (> arg 99) (< arg 1))
+ (error "Prefix must be between 1 and 99")
+ (goto-char
+ (if (> (point-max) 80000)
+ (* (/ (point-max) 100) arg)
+ (/ (* (point-max) arg) 100)))
+ (back-to-indentation))
+ (let (lim)
+ (if (and (eolp) (not (bolp))) (forward-char -1))
+ (save-excursion
+ (end-of-line)
+ (setq lim (point)))
+ (if (re-search-forward "[][(){}]" lim t)
+ (backward-char)
+ (error "No matching character on line")))
+ (cond ((looking-at "[\(\[{]")
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (forward-sexp 1)
+ (if com
+ (vip-execute-com 'vip-paren-match nil com)
+ (backward-char)))
+ ((looking-at "[])}]")
+ (forward-char)
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (backward-sexp 1)
+ (if com (vip-execute-com 'vip-paren-match nil com)))
+ (t (error ""))))))
+
+\f
+;; sentence ,paragraph and heading
+
+(defun vip-forward-sentence (arg)
+ "Forward sentence."
+ (interactive "P")
+ (push-mark nil t)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (forward-sentence val)
+ (if com (vip-execute-com 'vip-forward-sentence nil com))))
+
+(defun vip-backward-sentence (arg)
+ "Backward sentence."
+ (interactive "P")
+ (push-mark nil t)
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (backward-sentence val)
+ (if com (vip-execute-com 'vip-backward-sentence nil com))))
+
+(defun vip-forward-paragraph (arg)
+ "Forward paragraph."
+ (interactive "P")
+ (push-mark nil t)
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (forward-paragraph val)
+ (if com (vip-execute-com 'vip-forward-paragraph nil com))))
+
+(defun vip-backward-paragraph (arg)
+ "Backward paragraph."
+ (interactive "P")
+ (push-mark nil t)
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (backward-paragraph val)
+ (if com (vip-execute-com 'vip-backward-paragraph nil com))))
+
+;; should be mode-specific etc.
+
+(defun vip-prev-heading (arg)
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (re-search-backward vip-heading-start nil t val)
+ (goto-char (match-beginning 0))
+ (if com (vip-execute-com 'vip-prev-heading nil com))))
+
+(defun vip-heading-end (arg)
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (re-search-forward vip-heading-end nil t val)
+ (goto-char (match-beginning 0))
+ (if com (vip-execute-com 'vip-heading-end nil com))))
+
+(defun vip-next-heading (arg)
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getCom arg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (end-of-line)
+ (re-search-forward vip-heading-start nil t val)
+ (goto-char (match-beginning 0))
+ (if com (vip-execute-com 'vip-next-heading nil com))))
+
+\f
+;; scrolling
+
+(setq scroll-step 1)
+
+(defun vip-scroll (arg)
+ "Scroll to next screen."
+ (interactive "p")
+ (if (> arg 0)
+ (while (> arg 0)
+ (scroll-up)
+ (setq arg (1- arg)))
+ (while (> 0 arg)
+ (scroll-down)
+ (setq arg (1+ arg)))))
+
+(defun vip-scroll-back (arg)
+ "Scroll to previous screen."
+ (interactive "p")
+ (vip-scroll (- arg)))
+
+(defun vip-scroll-down (arg)
+ "Pull down half screen."
+ (interactive "P")
+ (condition-case nil
+ (if (null arg)
+ (scroll-down (/ (window-height) 2))
+ (scroll-down arg))
+ (error (beep 1)
+ (message "Beginning of buffer")
+ (goto-char (point-min)))))
+
+(defun vip-scroll-down-one (arg)
+ "Scroll up one line."
+ (interactive "p")
+ (scroll-down arg))
+
+(defun vip-scroll-up (arg)
+ "Pull up half screen."
+ (interactive "P")
+ (condition-case nil
+ (if (null arg)
+ (scroll-up (/ (window-height) 2))
+ (scroll-up arg))
+ (error (beep 1)
+ (message "End of buffer")
+ (goto-char (point-max)))))
+
+(defun vip-scroll-up-one (arg)
+ "Scroll down one line."
+ (interactive "p")
+ (scroll-up arg))
+
+\f
+;; searching
+
+(defun vip-if-string (prompt)
+ (let ((s (vip-read-string-with-history
+ prompt
+ nil ; no initial
+ 'vip-search-history
+ (car vip-search-history))))
+ (if (not (string= s ""))
+ (setq vip-s-string s))))
+
+
+(defun vip-toggle-search-style (arg)
+ "Toggle the value of vip-case-fold-search/vip-re-search.
+Without prefix argument, will ask which search style to toggle. With prefix
+arg 1,toggles vip-case-fold-search; with arg 2 toggles vip-re-search.
+
+Although this function is bound to \\[vip-toggle-search-style], the most
+convenient way to use it is to bind `//' to the macro
+`1 M-x vip-toggle-search-style' and `///' to
+`2 M-x vip-toggle-search-style'. In this way, hitting `//' quickly will
+toggle case-fold-search and hitting `/' three times witth toggle regexp
+search. Macros are more convenient in this case because they don't affect
+the Emacs binding of `/'."
+ (interactive "P")
+ (let (msg)
+ (cond ((or (eq arg 1)
+ (and (null arg)
+ (y-or-n-p (format "Search style: '%s'. Want '%s'? "
+ (if vip-case-fold-search
+ "case-insensitive" "case-sensitive")
+ (if vip-case-fold-search
+ "case-sensitive"
+ "case-insensitive")))))
+ (setq vip-case-fold-search (null vip-case-fold-search))
+ (if vip-case-fold-search
+ (setq msg "Search becomes case-insensitive")
+ (setq msg "Search becomes case-sensitive")))
+ ((or (eq arg 2)
+ (and (null arg)
+ (y-or-n-p (format "Search style: '%s'. Want '%s'? "
+ (if vip-re-search
+ "regexp-search" "vanilla-search")
+ (if vip-re-search
+ "vanilla-search"
+ "regexp-search")))))
+ (setq vip-re-search (null vip-re-search))
+ (if vip-re-search
+ (setq msg "Search becomes regexp-style")
+ (setq msg "Search becomes vanilla-style")))
+ (t
+ (setq msg "Search style remains unchanged")))
+ (prin1 msg t)))
+
+
+(defun vip-search-forward (arg)
+ "Search a string forward.
+ARG is used to find the ARG's occurrence of the string.
+Null string will repeat previous search."
+ (interactive "P")
+ (let ((val (vip-P-val arg))
+ (com (vip-getcom arg))
+ (old-str vip-s-string))
+ (setq vip-s-forward t)
+ (vip-if-string "/")
+ ;; this is not used at present, but may be used later
+ (if (or (not (equal old-str vip-s-string))
+ (not (markerp vip-local-search-start-marker))
+ (not (marker-buffer vip-local-search-start-marker)))
+ (setq vip-local-search-start-marker (point-marker)))
+ (vip-search vip-s-string t val)
+ (if com
+ (progn
+ (vip-move-marker-locally 'vip-com-point (mark t))
+ (vip-execute-com 'vip-search-next val com)))))
+
+(defun vip-search-backward (arg)
+ "Search a string backward.
+ARG is used to find the ARG's occurrence of the string.
+Null string will repeat previous search."
+ (interactive "P")
+ (let ((val (vip-P-val arg))
+ (com (vip-getcom arg))
+ (old-str vip-s-string))
+ (setq vip-s-forward nil)
+ (vip-if-string "?")
+ ;; this is not used at present, but may be used later
+ (if (or (not (equal old-str vip-s-string))
+ (not (markerp vip-local-search-start-marker))
+ (not (marker-buffer vip-local-search-start-marker)))
+ (setq vip-local-search-start-marker (point-marker)))
+ (vip-search vip-s-string nil val)
+ (if com
+ (progn
+ (vip-move-marker-locally 'vip-com-point (mark t))
+ (vip-execute-com 'vip-search-next val com)))))
+
+
+(defun vip-search (string forward arg &optional no-offset init-point)
+ "Search for COUNT's occurrence of STRING.
+Search is forward if FORWARD is non-nil, otherwise backward.
+INIT-POINT is the position where search is to start.
+Arguments: (STRING FORWARD COUNT &optional NO-OFFSET INIT-POINT LIMIT)."
+ (if (not (equal string ""))
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg))
+ (null-arg (null (vip-P-val arg))) (offset (not no-offset))
+ (case-fold-search vip-case-fold-search)
+ (start-point (or init-point (point))))
+ (vip-deactivate-mark)
+ (if forward
+ (condition-case nil
+ (progn
+ (if offset (vip-forward-char-carefully))
+ (if vip-re-search
+ (progn
+ (re-search-forward string nil nil val)
+ (re-search-backward string))
+ (search-forward string nil nil val)
+ (search-backward string))
+ (vip-flash-search-pattern)
+ (if (not (equal start-point (point)))
+ (push-mark start-point t)))
+ (search-failed
+ (if (and null-arg vip-search-wrap-around-t)
+ (progn
+ (message "Search wrapped around end of buffer")
+ (goto-char (point-min))
+ (vip-search string forward (cons 1 com) t start-point)
+ ;; delete the wrapped around message
+ (sit-for 2)(message "")
+ )
+ (goto-char start-point)
+ (error "`%s': %s not found"
+ string
+ (if vip-re-search "Pattern" "String"))
+ )))
+ ;; backward
+ (condition-case nil
+ (progn
+ (if vip-re-search
+ (re-search-backward string nil nil val)
+ (search-backward string nil nil val))
+ (vip-flash-search-pattern)
+ (if (not (equal start-point (point)))
+ (push-mark start-point t)))
+ (search-failed
+ (if (and null-arg vip-search-wrap-around-t)
+ (progn
+ (message "Search wrapped around beginning of buffer")
+ (goto-char (point-max))
+ (vip-search string forward (cons 1 com) t start-point)
+ ;; delete the wrapped around message
+ (sit-for 2)(message "")
+ )
+ (goto-char start-point)
+ (error "`%s': %s not found"
+ string
+ (if vip-re-search "Pattern" "String"))
+ )))))))
+
+(defun vip-search-next (arg)
+ "Repeat previous search."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if (null vip-s-string) (error vip-NoPrevSearch))
+ (vip-search vip-s-string vip-s-forward arg)
+ (if com
+ (progn
+ (vip-move-marker-locally 'vip-com-point (mark t))
+ (vip-execute-com 'vip-search-next val com)))))
+
+(defun vip-search-Next (arg)
+ "Repeat previous search in the reverse direction."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (com (vip-getcom arg)))
+ (if (null vip-s-string) (error vip-NoPrevSearch))
+ (vip-search vip-s-string (not vip-s-forward) arg)
+ (if com
+ (progn
+ (vip-move-marker-locally 'vip-com-point (mark t))
+ (vip-execute-com 'vip-search-Next val com)))))
+
+
+;; Search contents of buffer defined by one of Viper's motion commands.
+;; Repeatable via `n' and `N'.
+(defun vip-buffer-search-enable (&optional c)
+ (cond (c (setq vip-buffer-search-char c))
+ ((null vip-buffer-search-char)
+ (setq vip-buffer-search-char ?g)))
+ (define-key vip-vi-basic-map
+ (char-to-string vip-buffer-search-char) 'vip-command-argument)
+ (aset vip-exec-array vip-buffer-search-char 'vip-exec-buffer-search)
+ (setq vip-prefix-commands (cons vip-buffer-search-char vip-prefix-commands)))
+
+(defun vip-isearch-forward (arg)
+ "This is a Viper wrap-around for isearch-forward."
+ (interactive "P")
+ ;; emacs bug workaround
+ (if (listp arg) (setq arg (car arg)))
+ (vip-exec-form-in-emacs (list 'isearch-forward arg)))
+
+(defun vip-isearch-backward (arg)
+ "This is a Viper wrap-around for isearch-backward."
+ (interactive "P")
+ ;; emacs bug workaround
+ (if (listp arg) (setq arg (car arg)))
+ (vip-exec-form-in-emacs (list 'isearch-backward arg)))
+
+\f
+;; visiting and killing files, buffers
+
+(defun vip-switch-to-buffer ()
+ "Switch to buffer in the current window."
+ (interactive)
+ (let (buffer)
+ (setq buffer
+ (read-buffer
+ (format "Switch to buffer in this window \(%s\): "
+ (buffer-name (other-buffer (current-buffer))))))
+ (switch-to-buffer buffer)
+ ))
+
+(defun vip-switch-to-buffer-other-window ()
+ "Switch to buffer in another window."
+ (interactive)
+ (let (buffer)
+ (setq buffer
+ (read-buffer
+ (format "Switch to buffer in another window \(%s\): "
+ (buffer-name (other-buffer (current-buffer))))))
+ (switch-to-buffer-other-window buffer)
+ ))
+
+(defun vip-kill-buffer ()
+ "Kill a buffer."
+ (interactive)
+ (let (buffer buffer-name)
+ (setq buffer-name
+ (read-buffer
+ (format "Kill buffer \(%s\): "
+ (buffer-name (current-buffer)))))
+ (setq buffer
+ (if (null buffer-name)
+ (current-buffer)
+ (get-buffer buffer-name)))
+ (if (null buffer) (error "`%s': No such buffer" buffer-name))
+ (if (or (not (buffer-modified-p buffer))
+ (y-or-n-p
+ (format
+ "Buffer `%s' is modified, are you sure you want to kill it? "
+ buffer-name)))
+ (kill-buffer buffer)
+ (error "Buffer not killed"))))
+
+
+(defvar vip-smart-suffix-list '("" "tex" "c" "cc" "el" "p")
+ "*List of suffixes that Viper automatically tries to append to filenames ending with a `.'.
+This is useful when you the current directory contains files with the same
+prefix and many different suffixes. Usually, only one of the suffixes
+represents an editable file. However, file completion will stop at the `.'
+The smart suffix feature lets you hit RET in such a case, and Viper will
+select the appropriate suffix.
+
+Suffixes are tried in the order given and the first suffix for which a
+corresponding file exists is selected. If no file exists for any of the
+suffixes, the user is asked to confirm.
+
+To turn this feature off, set this variable to nil.")
+
+;; Try to add suffix to files ending with a `.'
+;; Useful when the user hits RET on a non-completed file name.
+(defun vip-file-add-suffix ()
+ (let ((count 0)
+ (len (length vip-smart-suffix-list))
+ (file (buffer-string))
+ found key cmd suff)
+ (goto-char (point-max))
+ (if (and vip-smart-suffix-list (string-match "\\.$" file))
+ (progn
+ (while (and (not found) (< count len))
+ (setq suff (nth count vip-smart-suffix-list)
+ count (1+ count))
+ (if (file-exists-p (format "%s%s" file suff))
+ (progn
+ (setq found t)
+ (insert suff))))
+
+ (if found
+ ()
+ (vip-tmp-insert-at-eob " [Please complete file name]")
+ (unwind-protect
+ (while (not (memq cmd '(exit-minibuffer vip-exit-minibuffer)))
+ (setq cmd
+ (key-binding (setq key (read-key-sequence nil))))
+ (cond ((eq cmd 'self-insert-command)
+ (if vip-xemacs-p
+ (insert (events-to-keys key))
+ (insert key)))
+ ((memq cmd '(exit-minibuffer vip-exit-minibuffer))
+ nil)
+ (t (command-execute cmd)))
+ )))
+ ))
+ ))
+
+
+;; Advice for use in find-file and read-file-name commands.
+(defadvice exit-minibuffer (before vip-exit-minibuffer-advice activate)
+ "Runs vip-minibuffer-exit-hook just before exiting the minibuffer.
+Beginning with Emacs 19.26, the standard `minibuffer-exit-hook' is run
+*after* exiting the minibuffer."
+ (run-hooks 'vip-minibuffer-exit-hook))
+
+(defadvice find-file (before vip-add-suffix-advice activate)
+ "Uses read-file-name to read arguments."
+ (interactive (list (read-file-name "Find file: "
+ nil default-directory))))
+
+(defadvice find-file-other-window (before vip-add-suffix-advice activate)
+ "Uses read-file-name to read arguments."
+ (interactive (list (read-file-name "Find file in other window: "
+ nil default-directory))))
+
+;; find-file-other-screen doesn't need advice because it apparently uses
+;; read-file-name to read its argument.
+(defadvice find-file-other-frame (before vip-add-suffix-advice activate)
+ "Uses read-file-name to read arguments."
+ (interactive (list (read-file-name "Find file in other frame: "
+ nil default-directory))))
+
+(defadvice read-file-name (around vip-suffix-advice activate)
+ "Makes exit-minibuffer run `vip-file-add-suffix' as a hook."
+ (let ((vip-minibuffer-exit-hook 'vip-file-add-suffix))
+ ad-do-it))
+
+;; must be after we did advice or else the advice won't take hold
+(if vip-xemacs-p
+ (fset 'vip-find-file-other-frame
+ (symbol-function 'find-file-other-screen))
+ (fset 'vip-find-file-other-frame
+ (symbol-function 'find-file-other-frame)))
+
+
+\f
+;; yank and pop
+
+(defsubst vip-yank (text)
+ "Yank TEXT silently. This works correctly with Emacs's yank-pop command."
+ (insert text)
+ (setq this-command 'yank))
+
+(defun vip-put-back (arg)
+ "Put back after point/below line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (text (if vip-use-register
+ (cond ((vip-valid-register vip-use-register '(digit))
+ (current-kill (- vip-use-register ?1) 'do-not-rotate))
+ ((vip-valid-register vip-use-register)
+ (get-register (downcase vip-use-register)))
+ (t (error vip-InvalidRegister vip-use-register)))
+ (current-kill 0))))
+ (if (null text)
+ (if vip-use-register
+ (let ((reg vip-use-register))
+ (setq vip-use-register nil)
+ (error vip-EmptyRegister reg))
+ (error "")))
+ (setq vip-use-register nil)
+ (if (vip-end-with-a-newline-p text)
+ (progn
+ (if (eobp)
+ (insert "\n")
+ (forward-line 1))
+ (beginning-of-line))
+ (if (not (eolp)) (vip-forward-char-carefully)))
+ (set-marker (vip-mark-marker) (point) (current-buffer))
+ (vip-set-destructive-command
+ (list 'vip-put-back val nil vip-use-register nil nil))
+ (vip-loop val (vip-yank text)))
+ (exchange-point-and-mark)
+ (vip-deactivate-mark))
+
+(defun vip-Put-back (arg)
+ "Put back at point/above line."
+ (interactive "P")
+ (let ((val (vip-p-val arg))
+ (text (if vip-use-register
+ (cond ((vip-valid-register vip-use-register '(digit))
+ (current-kill (- vip-use-register ?1) 'do-not-rotate))
+ ((vip-valid-register vip-use-register)
+ (get-register (downcase vip-use-register)))
+ (t (error vip-InvalidRegister vip-use-register)))
+ (current-kill 0))))
+ (if (null text)
+ (if vip-use-register
+ (let ((reg vip-use-register))
+ (setq vip-use-register nil)
+ (error vip-EmptyRegister reg))
+ (error "")))
+ (setq vip-use-register nil)
+ (if (vip-end-with-a-newline-p text) (beginning-of-line))
+ (vip-set-destructive-command
+ (list 'vip-Put-back val nil vip-use-register nil nil))
+ (set-marker (vip-mark-marker) (point) (current-buffer))
+ (vip-loop val (vip-yank text)))
+ (exchange-point-and-mark)
+ (vip-deactivate-mark))
+
+
+(defun vip-copy-region-as-kill (beg end)
+ "Copy region to kill-ring.
+If BEG and END do not belong to the same buffer, copy empty region."
+ (condition-case nil
+ (copy-region-as-kill beg end)
+ (error (copy-region-as-kill beg beg))))
+
+(defun vip-save-last-insertion (beg end)
+ "Saves last inserted text for possible use by vip-repeat command."
+ (setq vip-last-insertion (buffer-substring beg end))
+ (or (< (length vip-d-com) 5)
+ (setcar (nthcdr 4 vip-d-com) vip-last-insertion))
+ (or (null vip-command-ring)
+ (ring-empty-p vip-command-ring)
+ (progn
+ (setcar (nthcdr 4 (vip-current-ring-item vip-command-ring))
+ vip-last-insertion)
+ ;; del most recent elt, if identical to the second most-recent
+ (vip-cleanup-ring vip-command-ring)))
+ )
+
+(defsubst vip-yank-last-insertion ()
+ "Inserts the text saved by the previous vip-save-last-insertion command."
+ (condition-case nil
+ (insert vip-last-insertion)
+ (error nil)))
+
+
+(defun vip-delete-char (arg)
+ "Delete character."
+ (interactive "P")
+ (let ((val (vip-p-val arg)))
+ (vip-set-destructive-command (list 'vip-delete-char val nil nil nil nil))
+ (if (> val 1)
+ (save-excursion
+ (let ((here (point)))
+ (end-of-line)
+ (if (> val (- (point) here))
+ (setq val (- (point) here))))))
+ (if (and (eq val 0) (not vip-ex-style-motion)) (setq val 1))
+ (if (and vip-ex-style-motion (eolp))
+ (if (bolp) (error "") (setq val 0))) ; not bol---simply back 1 ch
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '((Letter)))
+ (vip-append-to-register
+ (downcase vip-use-register) (point) (- (point) val)))
+ ((vip-valid-register vip-use-register)
+ (copy-to-register
+ vip-use-register (point) (- (point) val) nil))
+ (t (error vip-InvalidRegister vip-use-register)))
+ (setq vip-use-register nil)))
+ (if vip-ex-style-motion
+ (progn
+ (delete-char val t)
+ (if (and (eolp) (not (bolp))) (backward-char 1)))
+ (if (eolp)
+ (delete-backward-char val t)
+ (delete-char val t)))))
+
+(defun vip-delete-backward-char (arg)
+ "Delete previous character. On reaching beginning of line, stop and beep."
+ (interactive "P")
+ (let ((val (vip-p-val arg)))
+ (vip-set-destructive-command
+ (list 'vip-delete-backward-char val nil nil nil nil))
+ (if (> val 1)
+ (save-excursion
+ (let ((here (point)))
+ (beginning-of-line)
+ (if (> val (- here (point)))
+ (setq val (- here (point)))))))
+ (if vip-use-register
+ (progn
+ (cond ((vip-valid-register vip-use-register '(Letter))
+ (vip-append-to-register
+ (downcase vip-use-register) (point) (+ (point) val)))
+ ((vip-valid-register vip-use-register)
+ (copy-to-register
+ vip-use-register (point) (+ (point) val) nil))
+ (t (error vip-InvalidRegister vip-use-register)))
+ (setq vip-use-register nil)))
+ (if (bolp) (ding)
+ (delete-backward-char val t))))
+
+(defun vip-del-backward-char-in-insert ()
+ "Delete 1 char backwards while in insert mode."
+ (interactive)
+ (if (and vip-ex-style-editing-in-insert (bolp))
+ (beep 1)
+ (delete-backward-char 1 t)))
+
+(defun vip-del-backward-char-in-replace ()
+ "Delete one character in replace mode.
+If `vip-delete-backwards-in-replace' is t, then DEL key actually deletes
+charecters. If it is nil, then the cursor just moves backwards, similarly
+to Vi. The variable `vip-ex-style-editing-in-insert', if t, doesn't let the
+cursor move past the beginning of the replacement region."
+ (interactive)
+ (cond (vip-delete-backwards-in-replace
+ (cond ((not (bolp))
+ (delete-backward-char 1 t))
+ (vip-ex-style-editing-in-insert
+ (beep 1))
+ ((bobp)
+ (beep 1))
+ (t
+ (delete-backward-char 1 t))))
+ (vip-ex-style-editing-in-insert
+ (if (bolp)
+ (beep 1)
+ (backward-char 1)))
+ (t
+ (backward-char 1))))
+
+
+\f
+;; join lines.
+
+(defun vip-join-lines (arg)
+ "Join this line to next, if ARG is nil. Otherwise, join ARG lines."
+ (interactive "*P")
+ (let ((val (vip-P-val arg)))
+ (vip-set-destructive-command (list 'vip-join-lines val nil nil nil nil))
+ (vip-loop (if (null val) 1 (1- val))
+ (progn
+ (end-of-line)
+ (if (not (eobp))
+ (progn
+ (forward-line 1)
+ (delete-region (point) (1- (point)))
+ (fixup-whitespace)))))))
+
+\f
+;; Replace state
+
+(defun vip-change (beg end)
+ (if (markerp beg) (setq beg (marker-position beg)))
+ (if (markerp end) (setq end (marker-position end)))
+ ;; beg is sometimes (mark t), which may be nil
+ (or beg (setq beg end))
+
+ (vip-set-complex-command-for-undo)
+ (if vip-use-register
+ (progn
+ (copy-to-register vip-use-register beg end nil)
+ (setq vip-use-register nil)))
+ (vip-set-replace-overlay beg end)
+ (setq last-command nil) ; separate repl text from prev kills
+
+ (if (= (vip-replace-start) (point-max))
+ (error "End of buffer"))
+
+ (setq vip-last-replace-region
+ (buffer-substring (vip-replace-start)
+ (vip-replace-end)))
+
+ ;; protect against error while inserting "@" and other disasters
+ ;; (e.g., read-only buff)
+ (condition-case conds
+ (if (vip-same-line (vip-replace-start)
+ (vip-replace-end))
+ (let ((delim-end (if (= (length vip-replace-region-end-symbol) 0)
+ ""
+ (substring vip-replace-region-end-symbol 0 1))))
+
+ ;; tabs cause problems in replace, so untabify
+ (goto-char (vip-replace-end))
+ (insert-before-markers "@") ; put placeholder after the TAB
+
+ (untabify (vip-replace-start) (point))
+ ;; del @ and the char under the '$'; don't put on kill ring
+ (delete-backward-char (1+ (length delim-end)))
+ (insert delim-end)
+ ;; this move takes care of the last posn in the overlay, which
+ ;; has to be shifted because of insert. We can't simply insert
+ ;; "$" before-markers because then overlay-start will shift the
+ ;; beginning of the overlay in case we are replacing a single
+ ;; character. This fixes the bug with `s' and `cl' commands.
+ (vip-move-replace-overlay (vip-replace-start) (point))
+ (goto-char (vip-replace-start))
+ (vip-change-state-to-replace t))
+ (kill-region (vip-replace-start)
+ (vip-replace-end))
+ (vip-change-state-to-insert))
+ (error ;; make sure that the overlay doesn't stay.
+ ;; go back to the original point
+ (goto-char (vip-replace-start))
+ (vip-hide-replace-overlay)
+ (vip-message-conditions conds))))
+
+
+(defun vip-change-subr (beg end)
+ ;; beg is sometimes (mark t), which may be nil
+ (or beg (setq beg end))
+
+ (if vip-use-register
+ (progn
+ (copy-to-register vip-use-register beg end nil)
+ (setq vip-use-register nil)))
+ (kill-region beg end)
+ (setq this-command 'vip-change)
+ (vip-yank-last-insertion))
+
+(defun vip-toggle-case (arg)
+ "Toggle character case."
+ (interactive "P")
+ (let ((val (vip-p-val arg)) (c))
+ (vip-set-destructive-command (list 'vip-toggle-case val nil nil nil nil))
+ (while (> val 0)
+ (setq c (following-char))
+ (delete-char 1 nil)
+ (if (eq c (upcase c))
+ (insert-char (downcase c) 1)
+ (insert-char (upcase c) 1))
+ (setq val (1- val)))))
+
+\f
+;; query replace
+
+(defun vip-query-replace ()
+ "Query replace.
+If a null string is suplied as the string to be replaced,
+the query replace mode will toggle between string replace
+and regexp replace."
+ (interactive)
+ (let (str)
+ (setq str (vip-read-string-with-history
+ (if vip-re-query-replace "Query replace regexp: "
+ "Query replace: ")
+ nil ; no initial
+ 'vip-replace1-history
+ (car vip-replace1-history) ; default
+ ))
+ (if (string= str "")
+ (progn
+ (setq vip-re-query-replace (not vip-re-query-replace))
+ (message "Query replace mode changed to %s"
+ (if vip-re-query-replace "regexp replace"
+ "string replace")))
+ (if vip-re-query-replace
+ (query-replace-regexp
+ str
+ (vip-read-string-with-history
+ (format "Query replace regexp `%s' with: " str)
+ nil ; no initial
+ 'vip-replace1-history
+ (car vip-replace1-history) ; default
+ ))
+ (query-replace
+ str
+ (vip-read-string-with-history
+ (format "Query replace `%s' with: " str)
+ nil ; no initial
+ 'vip-replace1-history
+ (car vip-replace1-history) ; default
+ ))))))
+
+\f
+;; marking
+
+(defun vip-mark-beginning-of-buffer ()
+ (interactive)
+ (push-mark (point))
+ (goto-char (point-min))
+ (exchange-point-and-mark)
+ (message "Mark set at the beginning of buffer"))
+
+(defun vip-mark-end-of-buffer ()
+ (interactive)
+ (push-mark (point))
+ (goto-char (point-max))
+ (exchange-point-and-mark)
+ (message "Mark set at the end of buffer"))
+
+(defun vip-mark-point ()
+ (interactive)
+ (let ((char (vip-read-char-exclusive)))
+ (cond ((and (<= ?a char) (<= char ?z))
+ (point-to-register (1+ (- char ?a))))
+ ((= char ?<) (vip-mark-beginning-of-buffer))
+ ((= char ?>) (vip-mark-end-of-buffer))
+ ((= char ?.) (vip-set-mark-if-necessary))
+ ((= char ?,) (vip-cycle-through-mark-ring))
+ ((= char ?D) (mark-defun))
+ (t (error ""))
+ )))
+
+;; Algorithm: If first invocation of this command save mark on ring, goto
+;; mark, M0, and pop the most recent elt from the mark ring into mark,
+;; making it into the new mark, M1.
+;; Push this mark back and set mark to the original point position, p1.
+;; So, if you hit '' or `` then you can return to p1.
+;;
+;; If repeated command, pop top elt from the ring into mark and
+;; jump there. This forgets the position, p1, and puts M1 back into mark.
+;; Then we save the current pos, which is M0, jump to M1 and pop M2 from
+;; the ring into mark. Push M2 back on the ring and set mark to M0.
+;; etc.
+(defun vip-cycle-through-mark-ring ()
+ "Visit previous locations on the mark ring.
+One can use `` and '' to temporarily jump 1 step back."
+ (let* ((sv-pt (point)))
+ ;; if repeated `m,' command, pop the previously saved mark.
+ ;; Prev saved mark is actually prev saved point. It is used if the
+ ;; user types `` or '' and is discarded
+ ;; from the mark ring by the next `m,' command.
+ ;; In any case, go to the previous or previously saved mark.
+ ;; Then push the current mark (popped off the ring) and set current
+ ;; point to be the mark. Current pt as mark is discarded by the next
+ ;; m, command.
+ (if (eq last-command 'vip-cycle-through-mark-ring)
+ ()
+ ;; save current mark if the first iteration
+ (setq mark-ring (delete (vip-mark-marker) mark-ring))
+ (if (mark t)
+ (push-mark (mark t) t)) )
+ (pop-mark)
+ (set-mark-command 1)
+ ;; don't duplicate mark on the ring
+ (setq mark-ring (delete (vip-mark-marker) mark-ring))
+ (push-mark sv-pt t)
+ (vip-deactivate-mark)
+ (setq this-command 'vip-cycle-through-mark-ring)
+ ))
+
+
+(defun vip-goto-mark (arg)
+ "Go to mark."
+ (interactive "P")
+ (let ((char (read-char))
+ (com (vip-getcom arg)))
+ (vip-goto-mark-subr char com nil)))
+
+(defun vip-goto-mark-and-skip-white (arg)
+ "Go to mark and skip to first non-white character on line."
+ (interactive "P")
+ (let ((char (read-char))
+ (com (vip-getCom arg)))
+ (vip-goto-mark-subr char com t)))
+
+(defun vip-goto-mark-subr (char com skip-white)
+ (if (eobp)
+ (if (bobp)
+ (error "Empty buffer")
+ (backward-char 1)))
+ (cond ((vip-valid-register char '(letter))
+ (let* ((buff (current-buffer))
+ (reg (1+ (- char ?a)))
+ (text-marker (get-register reg)))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (if (not (vip-valid-marker text-marker))
+ (error (format vip-EmptyTextmarker char)))
+ (if (and (vip-same-line (point) vip-last-jump)
+ (= (point) vip-last-jump-ignore))
+ (push-mark vip-last-jump t)
+ (push-mark nil t)) ; no msg
+ (vip-register-to-point reg)
+ (setq vip-last-jump (point-marker))
+ (cond (skip-white
+ (back-to-indentation)
+ (setq vip-last-jump-ignore (point))))
+ (if com
+ (if (equal buff (current-buffer))
+ (vip-execute-com (if skip-white
+ 'vip-goto-mark-and-skip-white
+ 'vip-goto-mark)
+ nil com)
+ (switch-to-buffer buff)
+ (goto-char vip-com-point)
+ (vip-change-state-to-vi)
+ (error "")))))
+ ((and (not skip-white) (= char ?`))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (if (and (vip-same-line (point) vip-last-jump)
+ (= (point) vip-last-jump-ignore))
+ (goto-char vip-last-jump))
+ (if (= (point) (mark t)) (pop-mark))
+ (exchange-point-and-mark)
+ (setq vip-last-jump (point-marker)
+ vip-last-jump-ignore 0)
+ (if com (vip-execute-com 'vip-goto-mark nil com)))
+ ((and skip-white (= char ?'))
+ (if com (vip-move-marker-locally 'vip-com-point (point)))
+ (if (and (vip-same-line (point) vip-last-jump)
+ (= (point) vip-last-jump-ignore))
+ (goto-char vip-last-jump))
+ (if (= (point) (mark t)) (pop-mark))
+ (exchange-point-and-mark)
+ (setq vip-last-jump (point))
+ (back-to-indentation)
+ (setq vip-last-jump-ignore (point))
+ (if com (vip-execute-com 'vip-goto-mark-and-skip-white nil com)))
+ (t (error vip-InvalidTextmarker char))))
+
+(defun vip-insert-tab ()
+ (interactive)
+ (insert-tab))
+
+(defun vip-exchange-point-and-mark ()
+ (interactive)
+ (exchange-point-and-mark)
+ (back-to-indentation))
+
+;; Input Mode Indentation
+
+(defun vip-forward-indent ()
+ "Indent forward -- `C-t' in Vi."
+ (interactive)
+ (setq vip-cted t)
+ (indent-to (+ (current-column) vip-shift-width)))
+
+(defun vip-backward-indent ()
+ "Backtab, C-d in VI"
+ (interactive)
+ (if vip-cted
+ (let ((p (point)) (c (current-column)) bol (indent t))
+ (if (vip-looking-back "[0^]")
+ (progn
+ (if (= ?^ (preceding-char)) (setq vip-preserve-indent t))
+ (delete-backward-char 1)
+ (setq p (point))
+ (setq indent nil)))
+ (save-excursion
+ (beginning-of-line)
+ (setq bol (point)))
+ (if (re-search-backward "[^ \t]" bol 1) (forward-char))
+ (delete-region (point) p)
+ (if indent
+ (indent-to (- c vip-shift-width)))
+ (if (or (bolp) (vip-looking-back "[^ \t]"))
+ (setq vip-cted nil)))))
+
+(defun vip-autoindent ()
+ "Auto Indentation, Vi-style."
+ (interactive)
+ (let ((col (current-indentation)))
+ (if (not vip-preserve-indent)
+ (setq vip-current-indent col)
+ (setq vip-preserve-indent nil))
+ (newline 1)
+ (if vip-auto-indent
+ (progn
+ (setq vip-cted t)
+ (indent-to vip-current-indent)))))
+
+
+;; Viewing registers
+
+(defun vip-ket-function (arg)
+ "Function called by \], the ket. View registers and call \]\]."
+ (interactive "P")
+ (let ((reg (read-char)))
+ (cond ((vip-valid-register reg '(letter Letter))
+ (view-register (downcase reg)))
+ ((vip-valid-register reg '(digit))
+ (let ((text (current-kill (- reg ?1) 'do-not-rotate)))
+ (save-excursion
+ (set-buffer (get-buffer-create "*Output*"))
+ (delete-region (point-min) (point-max))
+ (insert (format "Register %c contains the string:\n" reg))
+ (insert text)
+ (goto-char (point-min)))
+ (display-buffer "*Output*")))
+ ((= ?\] reg)
+ (vip-next-heading arg))
+ (t (error
+ vip-InvalidRegister reg)))))
+
+(defun vip-brac-function (arg)
+ "Function called by \[, the brac. View textmarkers and call \[\["
+ (interactive "P")
+ (let ((reg (read-char)))
+ (cond ((= ?\[ reg)
+ (vip-prev-heading arg))
+ ((= ?\] reg)
+ (vip-heading-end arg))
+ ((vip-valid-register reg '(letter))
+ (let* ((val (get-register (1+ (- reg ?a))))
+ (buf (if (not val)
+ (error
+ (format vip-EmptyTextmarker reg))
+ (marker-buffer val)))
+ (pos (marker-position val))
+ line-no text (s pos) (e pos))
+ (save-excursion
+ (set-buffer (get-buffer-create "*Output*"))
+ (delete-region (point-min) (point-max))
+ (if (and buf pos)
+ (progn
+ (save-excursion
+ (set-buffer buf)
+ (setq line-no (1+ (count-lines (point-min) val)))
+ (goto-char pos)
+ (beginning-of-line)
+ (if (re-search-backward "[^ \t]" nil t)
+ (progn
+ (beginning-of-line)
+ (setq s (point))))
+ (goto-char pos)
+ (forward-line 1)
+ (if (re-search-forward "[^ \t]" nil t)
+ (progn
+ (end-of-line)
+ (setq e (point))))
+ (setq text (buffer-substring s e))
+ (setq text (format "%s<%c>%s"
+ (substring text 0 (- pos s))
+ reg (substring text (- pos s)))))
+ (insert
+ (format
+ "Textmarker `%c' is in buffer `%s' at line %d.\n"
+ reg (buffer-name buf) line-no))
+ (insert (format "Here is some text around %c:\n\n %s"
+ reg text)))
+ (insert (format vip-EmptyTextmarker reg)))
+ (goto-char (point-min)))
+ (display-buffer "*Output*")))
+ (t (error vip-InvalidTextmarker reg)))))
+
+
+\f
+;; commands in insertion mode
+
+(defun vip-delete-backward-word (arg)
+ "Delete previous word."
+ (interactive "p")
+ (save-excursion
+ (push-mark nil t)
+ (backward-word arg)
+ (delete-region (point) (mark t))
+ (pop-mark)))
+
+
+(defun vip-set-expert-level (&optional dont-change-unless)
+ "Sets the expert level for a Viper user.
+Can be called interactively to change (temporarily or permanently) the
+current expert level.
+
+The optional argument DONT-CHANGE-UNLESS if not nil, says that
+the level should not be changed, unless its current value is
+meaningless (i.e., not one of 1,2,3,4,5).
+
+User level determines the setting of Viper variables that are most
+sensitive for VI-style look-and-feel."
+
+ (interactive)
+
+ (if (not (numberp vip-expert-level)) (setq vip-expert-level 0))
+
+ (save-window-excursion
+ (delete-other-windows)
+ ;; if 0 < vip-expert-level < vip-max-expert-level
+ ;; & dont-change-unless = t -- use it; else ask
+ (vip-ask-level dont-change-unless))
+
+ (setq vip-always t
+ vip-ex-style-motion t
+ vip-ex-style-editing-in-insert t
+ vip-want-ctl-h-help nil)
+
+ (cond
+ ;; a novice or a beginner
+ ((eq vip-expert-level 1)
+ (global-set-key vip-toggle-key ;; in emacs-state
+ (if window-system
+ 'vip-iconify
+ 'suspend-emacs))
+ (setq vip-no-multiple-ESC t
+ vip-re-search t
+ vip-vi-style-in-minibuffer t
+ vip-search-wrap-around-t t
+ vip-want-emacs-keys-in-vi nil
+ vip-want-emacs-keys-in-insert nil))
+
+ ;; an intermediate to guru
+ ((and (> vip-expert-level 1) (< vip-expert-level 5))
+ (setq vip-no-multiple-ESC (if window-system t 'twice)
+ vip-want-emacs-keys-in-vi t
+ vip-want-emacs-keys-in-insert (> vip-expert-level 2))
+
+ (if (eq vip-expert-level 4) ; respect user's ex-style motions
+ ; and vip-no-multiple-ESC
+ (progn
+ (setq-default vip-ex-style-editing-in-insert
+ (cdr (assoc 'vip-ex-style-editing-in-insert
+ vip-saved-user-settings))
+ vip-ex-style-motion
+ (cdr (assoc 'vip-ex-style-motion
+ vip-saved-user-settings)))
+ (setq vip-ex-style-motion
+ (cdr (assoc 'vip-ex-style-motion vip-saved-user-settings))
+ vip-ex-style-editing-in-insert
+ (cdr (assoc 'vip-ex-style-editing-in-insert
+ vip-saved-user-settings))
+ vip-re-search
+ (cdr (assoc 'vip-re-search vip-saved-user-settings))
+ vip-no-multiple-ESC
+ (cdr (assoc 'vip-no-multiple-ESC
+ vip-saved-user-settings))))))
+
+ ;; A wizard
+ ;; Ideally, if 5 is selected, a buffer should pop up to let the
+ ;; user toggle variable values.
+ (t (setq-default vip-ex-style-editing-in-insert
+ (cdr (assoc 'vip-ex-style-editing-in-insert
+ vip-saved-user-settings))
+ vip-ex-style-motion
+ (cdr (assoc 'vip-ex-style-motion
+ vip-saved-user-settings)))
+ (setq vip-want-ctl-h-help
+ (cdr (assoc 'vip-want-ctl-h-help vip-saved-user-settings))
+ vip-always
+ (cdr (assoc 'vip-always vip-saved-user-settings))
+ vip-no-multiple-ESC
+ (cdr (assoc 'vip-no-multiple-ESC vip-saved-user-settings))
+ vip-ex-style-motion
+ (cdr (assoc 'vip-ex-style-motion vip-saved-user-settings))
+ vip-ex-style-editing-in-insert
+ (cdr (assoc 'vip-ex-style-editing-in-insert
+ vip-saved-user-settings))
+ vip-re-search
+ (cdr (assoc 'vip-re-search vip-saved-user-settings))
+ vip-want-emacs-keys-in-vi
+ (cdr (assoc 'vip-want-emacs-keys-in-vi
+ vip-saved-user-settings))
+ vip-want-emacs-keys-in-insert
+ (cdr (assoc 'vip-want-emacs-keys-in-insert
+ vip-saved-user-settings)))))
+ (vip-set-mode-vars-for vip-current-state)
+ (if (or vip-always
+ (and (> vip-expert-level 0) (> 5 vip-expert-level)))
+ (vip-set-hooks)))
+
+(defun vip-ask-level (dont-change-unless)
+ "Ask user expert level."
+ (let ((ask-buffer " *vip-ask-level*")
+ level-changed repeated)
+ (save-window-excursion
+ (switch-to-buffer ask-buffer)
+
+ (or (eq this-command 'vip-set-expert-level)
+ (and
+ (<= vip-expert-level vip-max-expert-level)
+ (>= vip-expert-level 1))
+ (progn
+ (insert "
+
+ *** Important Notice for VIP users***
+
+ This is VIPER
+
+@joke
+Viper Is a Package for Emacs Rebels,
+a VI Plan for Emacs Rescue,
+and a venomous VI PERil.
+@end joke
+
+Technically speaking, Viper is a new Vi emulator that replaces
+the old VIP package.
+
+Viper emulates Vi much better than VIP. It also significantly
+extends and improves upon Vi in many useful ways.
+
+Although many VIP settings in your ~/.vip are compatible with Viper,
+you may have to change some of them. Please refer to the documentation,
+which can be obtained by executing
+
+:help
+
+when Viper is in Vi state.
+
+If you will be so lucky as to find a bug, report it via the command
+
+:submitReport
+
+Type any key to continue... ")
+
+ (read-char)
+ (erase-buffer)))
+
+ (while (or (> vip-expert-level vip-max-expert-level)
+ (< vip-expert-level 1)
+ (null dont-change-unless))
+ (erase-buffer)
+ (if repeated
+ (progn
+ (message "Invalid user level")
+ (beep 1))
+ (setq repeated t))
+ (setq dont-change-unless t
+ level-changed t)
+ (insert "
+Please specify your level of familiarity with the venomous VI PERil
+(and the VI Plan for Emacs Rescue).
+You can change it at any time by typing `M-x vip-set-expert-level RET'
+
+ 1 -- BEGINNER: Almost all Emacs features are suppressed.
+ Feels almost like straight Vi. File name completion and
+ command history in the minibuffer are thrown in as a bonus.
+ To use Emacs productively, you must reach level 3 or higher.
+ 2 -- MASTER: C-c now has its standard Emacs meaning in Vi command state,
+ so most Emacs commands can be used when Viper is in Vi state.
+ Good progress---you are well on the way to level 3!
+ 3 -- GRAND MASTER: Like 3, but most Emacs commands are available also
+ in Viper's insert state.
+ 4 -- GURU: Like 3, but user settings are respected for vip-no-multiple-ESC,
+ vip-re-search, vip-ex-style-motion, & vip-ex-style-editing-in-insert
+ variables. Adjust these settings to your taste.
+ 5 -- WIZARD: Like 4, but user settings are also respected for vip-always,
+ vip-want-ctl-h-help, vip-want-emacs-keys-in-vi, and
+ vip-want-emacs-keys-in-insert. Adjust these to your taste.
+
+Please, specify your level now: ")
+
+ (setq vip-expert-level (- (vip-read-char-exclusive) ?0))
+ ) ; end while
+
+ ;; tell the user if level was changed
+ (and level-changed
+ (progn
+ (insert
+ (format "\n\n\n\n\n\t\tYou have selected user level %d"
+ vip-expert-level))
+ (if (y-or-n-p "Do you wish to make this change permanent? ")
+ ;; save the setting for vip-expert-level
+ (vip-save-setting
+ 'vip-expert-level
+ (format "Saving user level %d ..." vip-expert-level)
+ vip-custom-file-name))
+ ))
+ (bury-buffer) ; remove ask-buffer from screen
+ (message "")
+ )))
+
+
+(defun viper-version ()
+ (interactive)
+ (message "Viper version is %s" viper-version))
+
+(defalias 'vip-version 'viper-version)
+
+(defun vip-nil ()
+ (interactive)
+ (beep 1))
+
+
+;; Returns t, if the string before point matches the regexp STR.
+(defsubst vip-looking-back (str)
+ (and (save-excursion (re-search-backward str nil t))
+ (= (point) (match-end 0))))
+
+
+
+;; if ENFORCE-BUFFER is not nil, error if CHAR is a marker in another buffer
+(defun vip-register-to-point (char &optional enforce-buffer)
+ "Like jump-to-register, but switches to another buffer in another window."
+ (interactive "cViper register to point: ")
+ (let ((val (get-register char)))
+ (cond
+ ((and (fboundp 'frame-configuration-p)
+ (frame-configuration-p val))
+ (set-frame-configuration val))
+ ((window-configuration-p val)
+ (set-window-configuration val))
+ ((vip-valid-marker val)
+ (if (and enforce-buffer
+ (not (equal (current-buffer) (marker-buffer val))))
+ (error (concat vip-EmptyTextmarker " in this buffer")
+ (1- (+ char ?a))))
+ (pop-to-buffer (marker-buffer val))
+ (goto-char val))
+ ((and (consp val) (eq (car val) 'file))
+ (find-file (cdr val)))
+ (t
+ (error vip-EmptyTextmarker (1- (+ char ?a)))))))
+
+
+(defun vip-save-kill-buffer ()
+ "Save then kill current buffer. "
+ (interactive)
+ (if (< vip-expert-level 2)
+ (save-buffers-kill-emacs)
+ (save-buffer)
+ (kill-buffer (current-buffer))))
+
+
+\f
+;;; Bug Report
+
+(defun vip-submit-report ()
+ "Submit bug report on Viper."
+ (interactive)
+ (let ((reporter-prompt-for-summary-p t)
+ color-display-p frame-parameters
+ minibuffer-emacs-face minibuffer-vi-face minibuffer-insert-face
+ varlist salutation window-config)
+
+ ;; If mode info is needed, add variable to `let' and then set it below,
+ ;; like we did with color-display-p.
+ (setq color-display-p (if window-system
+ (vip-display-color-p)
+ 'non-x)
+ minibuffer-vi-face (if window-system
+ (vip-get-face vip-minibuffer-vi-face)
+ 'non-x)
+ minibuffer-insert-face (if window-system
+ (vip-get-face vip-minibuffer-insert-face)
+ 'non-x)
+ minibuffer-emacs-face (if window-system
+ (vip-get-face vip-minibuffer-emacs-face)
+ 'non-x)
+ frame-parameters (if (fboundp 'vip-frame-parameters)
+ (vip-frame-parameters (vip-selected-frame))))
+
+ (setq varlist (list 'vip-vi-minibuffer-minor-mode
+ 'vip-insert-minibuffer-minor-mode
+ 'vip-vi-intercept-minor-mode
+ 'vip-vi-local-user-minor-mode
+ 'vip-vi-kbd-minor-mode
+ 'vip-vi-global-user-minor-mode
+ 'vip-vi-state-modifier-minor-mode
+ 'vip-vi-diehard-minor-mode
+ 'vip-vi-basic-minor-mode
+ 'vip-replace-minor-mode
+ 'vip-insert-intercept-minor-mode
+ 'vip-insert-local-user-minor-mode
+ 'vip-insert-kbd-minor-mode
+ 'vip-insert-global-user-minor-mode
+ 'vip-insert-state-modifier-minor-mode
+ 'vip-insert-diehard-minor-mode
+ 'vip-insert-basic-minor-mode
+ 'vip-emacs-intercept-minor-mode
+ 'vip-emacs-local-user-minor-mode
+ 'vip-emacs-kbd-minor-mode
+ 'vip-emacs-global-user-minor-mode
+ 'vip-emacs-state-modifier-minor-mode
+ 'vip-automatic-iso-accents
+ 'vip-want-emacs-keys-in-insert
+ 'vip-want-emacs-keys-in-vi
+ 'vip-keep-point-on-undo
+ 'vip-no-multiple-ESC
+ 'vip-ESC-key
+ 'vip-want-ctl-h-help
+ 'vip-ex-style-editing-in-insert
+ 'vip-delete-backwards-in-replace
+ 'vip-vi-style-in-minibuffer
+ 'vip-vi-state-hooks
+ 'vip-insert-state-hooks
+ 'vip-replace-state-hooks
+ 'vip-emacs-state-hooks
+ 'ex-cycle-other-window
+ 'ex-cycle-through-non-files
+ 'vip-expert-level
+ 'major-mode
+ 'window-system
+ 'color-display-p
+ 'frame-parameters
+ 'minibuffer-vi-face
+ 'minibuffer-insert-face
+ 'minibuffer-emacs-face
+ ))
+ (setq salutation "
+Congratulations! You may have unearthed a bug in Viper!
+Please mail a concise, accurate summary of the problem to the address above.
+
+-------------------------------------------------------------------")
+ (setq window-config (current-window-configuration))
+ (with-output-to-temp-buffer " *vip-info*"
+ (switch-to-buffer " *vip-info*")
+ (delete-other-windows)
+ (princ "
+PLEASE FOLLOW THESE PROCEDURES
+------------------------------
+
+Before reporting a bug, please verify that it is related to Viper, and is
+not cause by other packages you are using.
+
+Don't report compilation warnings, unless you are certain that there is a
+problem. These warnings are normal and unavoidable.
+
+Please note that users should not modify variables and keymaps other than
+those advertised in the manual. Such `customization' is likely to crash
+Viper, as it would any other improperly customized Emacs package.
+
+If you are reporting an error message received while executing one of the
+Viper commands, type:
+
+ M-x set-variable <Return> debug-on-error <Return> t <Return>
+
+Then reproduce the error. The above command will cause Emacs to produce a
+back trace of the execution that leads to the error. Please include this
+trace in your bug report.
+
+If you believe that one of Viper's commands goes into an infinite loop
+\(e.g., Emacs freezes\), type:
+
+ M-x set-variable <Return> debug-on-quit <Return> t <Return>
+
+Then reproduce the problem. Wait for a few seconds, then type C-g to abort
+the current command. Include the resulting back trace in the bug report.
+
+Mail anyway (y or n)? ")
+ (if (y-or-n-p "Mail anyway? ")
+ ()
+ (set-window-configuration window-config)
+ (error "Bug report aborted")))
+
+ (require 'reporter)
+ (set-window-configuration window-config)
+
+ (reporter-submit-bug-report "kifer@cs.sunysb.edu"
+ (vip-version)
+ varlist
+ nil 'delete-other-windows
+ salutation)
+ ))
+
+
+
+
+;; Needed to smooth out the difference between Emacs' unread-command-events
+;; and XEmacs unread-command-event. Arg is a character, an event, a list of
+;; events or a sequence of keys.
+;; The semantics of placing an event on unread-command-event in XEmacs is
+;; not the same as placing (setq unread-command-event event)
+;; on the event queue using enqueue-eval-event. For instance, an event
+;; sitting in unread-command-event will be available to (next-event).
+;; In contrast, evals placed on event queue are not evaluated until all
+;; previous commands have been executed. This makes a difference when one
+;; of the events placed on the event queue is bound to a function that
+;; pauses for input, because these evals won't make input immediately
+;; available
+;;
+;; Due to a bug in unread-command-events, a non-event symbol in
+;; unread-command-evets list may cause Emacs to label this symbol to be an
+;; event. Below, we delete nil from event lists, since nil is the most
+;; common problem here. Hopefully, unread-command-evets will be fixed in
+;; the next release.
+(defun vip-set-unread-command-events (arg)
+ (if vip-emacs-p
+ (setq unread-command-events
+ (let ((new-events
+ (cond ((eventp arg) (list arg))
+ ((listp arg) arg)
+ ((sequencep arg)
+ (listify-key-sequence arg))
+ (t (error
+ "vip-set-unread-command-events: Invalid arg, %S"
+ arg)))))
+ (if (not (eventp nil))
+ (setq new-events (delq nil new-events)))
+ (append new-events unread-command-events)))
+ ;; XEmacs
+ (cond ((numberp arg)
+ (setq unread-command-event (character-to-event arg)))
+ ((eventp arg)
+ (setq unread-command-event arg))
+ ((sequencep arg)
+ (let ((length (length arg))
+ (count 0))
+ (while (< count length)
+ (enqueue-eval-event
+ 'vip-fudge-event-list-in-xemacs
+ (if (stringp arg)
+ (character-to-event (elt arg count))
+ (elt arg count)))
+ (setq count (1+ count))
+ ) ; while
+ (if (> length 0)
+ (or arg unread-command-event))))
+ (t (error "vip-set-unread-command-events: Invalid argument")))))
+
+(defun vip-fudge-event-list-in-xemacs (arg)
+ (setq unread-command-event arg))
+
+\f
+;;; Bring in the rest of the files
+(require 'viper-mous)
+(require 'viper-macs)
+(require 'viper-ex)
+
+
+\f
+;; The following is provided for compatibility with older VIP's
+
+(defalias 'vip-change-mode-to-vi 'vip-change-state-to-vi)
+(defalias 'vip-change-mode-to-insert 'vip-change-state-to-insert)
+(defalias 'vip-change-mode-to-emacs 'vip-change-state-to-emacs)
+
+;; This was the main Vi mode in old versions of VIP which may have been
+;; extensively used by VIP users. We declare it as a global var
+;; and, after .vip is loaded, we add this keymap to vip-vi-basic-map.
+(defvar vip-mode-map (make-sparse-keymap)
+ "This was the main Vi-mode keymap in the old versions of VIP.
+Viper provides this variable for compatibility. Whatever the user defines
+for this map, is merged into Viper's vip-vi-basic-map after loading .vip")
+
+
+\f
+;; Load .vip and setup hooks
+(defun vip-shell-mode-hook ()
+ "Hook specifically designed to enable Vi-style editing in shell mode."
+ (setq vip-add-newline-at-eob nil)
+ ;; this is nicer in shell mode
+ (setq vip-ex-style-editing-in-insert nil
+ vip-ex-style-motion nil)
+ (vip-add-local-keys 'vi-state
+ '(("\C-m" . comint-send-input) ; return
+ ("\C-d" . comint-delchar-or-maybe-eof))) ; \C-d
+ (vip-add-local-keys 'insert-state
+ '(("\C-m" . comint-send-input) ; return
+ ("\C-d" . comint-delchar-or-maybe-eof))) ; \C-d
+ )
+
+
+;; This sets major mode hooks to make them come up in vip-state.
+(defun vip-set-hooks ()
+
+ ;; It is of course a misnomer to call viper-mode a `major mode'.
+ ;; However, this has the effect that if the user didn't specify the
+ ;; default mode, new buffers that fall back on the default will come up
+ ;; in Fundamental Mode and Vi state.
+ (setq default-major-mode 'viper-mode)
+
+ (defadvice fundamental-mode (after vip-fundamental-mode-ad activate)
+ (vip-change-state-to-vi))
+
+ ;; The following major modes should come up in vi-state
+ (defvar emacs-lisp-mode-hook nil)
+ (add-hook 'emacs-lisp-mode-hook 'viper-mode)
+
+ (defvar lisp-mode-hook nil)
+ (add-hook 'lisp-mode-hook 'viper-mode)
+
+ (defvar bibtex-mode-hook nil)
+ (add-hook 'bibtex-mode-hook 'viper-mode)
+
+ (defvar cc-mode-hook nil)
+ (add-hook 'cc-mode-hook 'viper-mode)
+
+ (defvar c-mode-hook nil)
+ (add-hook 'c-mode-hook 'viper-mode)
+
+ (defvar c++-mode-hook nil)
+ (add-hook 'c++-mode-hook 'viper-mode)
+
+ (defvar lisp-interaction-mode-hook nil)
+ (add-hook 'lisp-interaction-mode-hook 'viper-mode)
+
+ (defvar text-mode-hook nil)
+ (add-hook 'text-mode-hook 'viper-mode)
+
+ (add-hook 'completion-list-mode-hook 'viper-mode)
+ (add-hook 'compilation-mode-hook 'viper-mode)
+
+ (defvar emerge-startup-hook nil)
+ (add-hook 'emerge-startup-hook 'vip-change-state-to-emacs)
+ ;; Run vip-change-state-to-vi after quitting emerge.
+ (vip-eval-after-load "emerge"
+ '(defadvice emerge-quit (after vip-emerge-advice activate)
+ "Run vip-change-state-to-vi after quitting emerge."
+ (vip-change-state-to-vi)))
+ ;; In case Emerge was loaded before Viper.
+ (defadvice emerge-quit (after vip-emerge-advice activate)
+ "Run vip-change-state-to-vi after quitting emerge."
+ (vip-change-state-to-vi))
+
+ (vip-eval-after-load "asm-mode"
+ '(defadvice asm-mode (after vip-asm-mode-ad activate)
+ "Run vip-change-state-to-vi on entry."
+ (vip-change-state-to-vi)))
+
+ ;; passwd.el sets up its own buffer, which turns up in Vi mode,
+ ;; overriding the local map. Noone needs Vi mode here.
+ (vip-eval-after-load
+ "passwd"
+ '(defadvice read-passwd-1 (before vip-passwd-ad activate)
+ "Vi-ism is prohibited when reading passwords, so switch to Emacs."
+ (vip-change-state-to-emacs)))
+
+ ;; Emacs shell
+ (defvar shell-mode-hook nil)
+ (add-hook 'shell-mode-hook 'vip-change-state-to-insert)
+ (add-hook 'shell-mode-hook 'vip-shell-mode-hook)
+
+ ;; Shell scripts
+ (defvar sh-mode-hook nil)
+ (add-hook 'sh-mode-hook 'viper-mode)
+
+ ;; Dired
+ ;; This is only necessary when the user uses vip-modify-major-mode
+ (add-hook 'dired-mode-hook 'vip-change-state-to-emacs)
+
+ (defvar view-hook nil
+ "View hook. Run after view mode.")
+ (add-hook 'view-hook 'vip-change-state-to-emacs)
+
+ ;; For VM users.
+ ;; Put summary and other VM buffers in Emacs state.
+ (defvar vm-mode-hooks nil
+ "This hook is run after vm is started.")
+ (defvar vm-summary-mode-hooks nil
+ "This hook is run after vm switches to summary mode.")
+ (add-hook 'vm-mode-hooks 'vip-change-state-to-emacs)
+ (add-hook 'vm-summary-mode-hooks 'vip-change-state-to-emacs)
+
+ ;; For RMAIL users.
+ ;; Put buf in Emacs state after edit.
+ (vip-eval-after-load
+ "rmailedit"
+ '(defadvice rmail-cease-edit (after vip-rmail-advice activate)
+ "Switch buffer to emacs-state after finishing with editing a message."
+ (vip-change-state-to-emacs)))
+ ;; In case RMAIL was loaded before Viper.
+ (defadvice rmail-cease-edit (after vip-rmail-advice activate)
+ "Switch buffer to emacs-state after finishing with editing a message."
+ (vip-change-state-to-emacs))
+ ) ; vip-set-hooks
+
+
+;; ~/.vip is loaded if it exists
+(if (and (file-exists-p vip-custom-file-name)
+ (not noninteractive))
+ (load vip-custom-file-name))
+
+;; VIP compatibility: merge whatever the user has in vip-mode-map into
+;; Viper's basic map.
+(vip-add-keymap vip-mode-map vip-vi-global-user-map)
+
+\f
+;; Applying Viper customization -- runs after (load .vip)
+
+;; Save user settings or Viper defaults for vars controled by vip-expert-level
+(setq vip-saved-user-settings
+ (list (cons 'vip-want-ctl-h-help vip-want-ctl-h-help)
+ (cons 'vip-always vip-always)
+ (cons 'vip-no-multiple-ESC vip-no-multiple-ESC)
+ (cons 'vip-ex-style-motion vip-ex-style-motion)
+ (cons 'vip-ex-style-editing-in-insert
+ vip-ex-style-editing-in-insert)
+ (cons 'vip-want-emacs-keys-in-vi vip-want-emacs-keys-in-vi)
+ (cons 'vip-want-emacs-keys-in-insert vip-want-emacs-keys-in-insert)
+ (cons 'vip-re-search vip-re-search)))
+
+
+(vip-set-minibuffer-style)
+(vip-set-minibuffer-faces)
+(vip-set-search-face)
+
+;;; Familiarize Viper with some minor modes that have their own keymaps
+(vip-harness-minor-mode "compile")
+(vip-harness-minor-mode "outline")
+(vip-harness-minor-mode "allout")
+(vip-harness-minor-mode "xref")
+(vip-harness-minor-mode "lmenu")
+(vip-harness-minor-mode "vc")
+(vip-harness-minor-mode "ltx-math") ; LaTeX-math-mode in AUC-TeX
+(vip-harness-minor-mode "latex") ; latex they moved math mode here
+
+
+;; Intercept maps could go in viper-keym.el
+;; We keep them here in case someone redefines them in ~/.vip
+
+(define-key vip-vi-intercept-map vip-ESC-key 'vip-intercept-ESC-key)
+(define-key vip-insert-intercept-map vip-ESC-key 'vip-intercept-ESC-key)
+
+;; This is taken care of by vip-insert-global-user-map.
+;;(define-key vip-replace-map vip-ESC-key 'vip-intercept-ESC-key)
+
+(define-key vip-insert-intercept-map vip-toggle-key 'vip-alternate-ESC)
+;; The default vip-toggle-key is \C-z; for the novice, it suspends or
+;; iconifies Emacs
+(define-key vip-vi-intercept-map vip-toggle-key
+ '(lambda () (interactive)
+ (if (and (< vip-expert-level 2) (equal vip-toggle-key "\C-z"))
+ (if window-system (vip-iconify) (suspend-emacs))
+ (vip-change-state-to-emacs))))
+
+(define-key vip-emacs-intercept-map vip-toggle-key 'vip-change-state-to-vi)
+
+
+(if (or vip-always
+ (and (< vip-expert-level 5) (> vip-expert-level 0)))
+ (vip-set-hooks))
+
+;; Let all minor modes take effect after loading
+;; this may not be enough, so we also set default minor-mode-alist.
+;; Without setting the default, new buffers that come up in emacs mode have
+;; minor-mode-map-alist = nil, unless we call vip-change-state-*
+(if (eq vip-current-state 'emacs-state)
+ (progn
+ (vip-change-state-to-emacs)
+ (setq-default minor-mode-map-alist minor-mode-map-alist)
+ ))
+
+;; set some useful macros
+
+;; repeat the 2nd previous command without rotating the command history
+(vip-record-kbd-macro
+ (vector vip-repeat-from-history-key '\1) 'vi-state
+ [(meta x) v i p - r e p e a t - f r o m - h i s t o r y return] 't)
+;; repeat the 3d previous command without rotating the command history
+(vip-record-kbd-macro
+ (vector vip-repeat-from-history-key '\2) 'vi-state
+ [(meta x) v i p - r e p e a t - f r o m - h i s t o r y return] 't)
+
+;; toggle case sensitivity in search
+(vip-record-kbd-macro
+ "//" 'vi-state
+ [1 (meta x) v i p - t o g g l e - s e a r c h - s t y l e return] 't)
+;; toggle regexp/vanila search
+(vip-record-kbd-macro
+ "///" 'vi-state
+ [2 (meta x) v i p - t o g g l e - s e a r c h - s t y l e return] 't)
+
+
+(run-hooks 'vip-load-hooks) ; the last chance to change anything
+
+(provide 'viper)
+(provide 'vip19)
+(provide 'vip)
+
+;;; viper.el ends here
+
HCoop / bpt / emacs.git / commitdiff