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emacs/lisp/emulation/viper-ex.el
Paul Eggert ab422c4d68 Update copyright notices for 2013.
2013-01-01 09:11:05 +00:00

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;;; viper-ex.el --- functions implementing the Ex commands for Viper
;; Copyright (C) 1994-1998, 2000-2013 Free Software Foundation, Inc.
;; Author: Michael Kifer <kifer@cs.stonybrook.edu>
;; Package: 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 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;;; Code:
(provide 'viper-ex)
;; Compiler pacifier
(defvar read-file-name-map)
(defvar viper-use-register)
(defvar viper-s-string)
(defvar viper-shift-width)
(defvar viper-ex-history)
(defvar viper-related-files-and-buffers-ring)
(defvar viper-local-search-start-marker)
(defvar viper-expert-level)
(defvar viper-custom-file-name)
(defvar viper-case-fold-search)
(defvar explicit-shell-file-name)
(defvar compile-command)
;; loading happens only in non-interactive compilation
;; in order to spare non-viperized emacs from being viperized
(if noninteractive
(eval-when-compile
(if (not (featurep 'viper-cmd))
(require 'viper-cmd))
))
;; end pacifier
(require 'viper-util)
(defgroup viper-ex nil
"Viper support for Ex commands."
:prefix "ex-"
:group 'viper)
;;; Variables
(defconst viper-ex-work-buf-name " *ex-working-space*")
(defvar viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(defconst viper-ex-tmp-buf-name " *ex-tmp*")
(defconst viper-ex-print-buf-name " *ex-print*")
(defvar viper-ex-print-buf (get-buffer-create viper-ex-print-buf-name))
;;; ex-commands...
(defun ex-cmd-obsolete (name)
(error "`%s': Obsolete command, not supported by Viper" name))
(defun ex-cmd-not-yet (name)
(error "`%s': Command not implemented in Viper" name))
;; alist entries: name (in any order), command, cont(??)
;; If command is a string, then that is an alias to the real command
;; to execute (for instance, ":m" -> ":move").
;; command attributes:
;; is-mashed: the command's args may be jammed right up against the command
;; one-letter: this is a one-letter token. Any text appearing after
;; the name gets appended as an argument for the command
;; i.e. ":kabc" gets turned into (ex-mark "abc")
(defconst ex-token-alist '(
("!" (ex-command))
("&" (ex-substitute t))
("=" (ex-line-no))
(">" (ex-line "right"))
("<" (ex-line "left"))
("Buffer" (if ex-cycle-other-window
(viper-switch-to-buffer)
(viper-switch-to-buffer-other-window)))
("Next" (ex-next (not ex-cycle-other-window)))
("PreviousRelatedFile" (ex-next-related-buffer -1))
("RelatedFile" (ex-next-related-buffer 1))
("W" "Write")
("WWrite" (save-some-buffers t))
("Write" (save-some-buffers))
("a" "append")
("args" (ex-args))
("buffer" (if ex-cycle-other-window
(viper-switch-to-buffer-other-window)
(viper-switch-to-buffer)))
("c" "change")
;; ch should be "change" but maintain old viper compatibility
("ch" "chdir")
("cd" (ex-cd))
("chdir" (ex-cd))
("copy" (ex-copy nil))
("customize" (customize-group "viper"))
("delete" (ex-delete))
("edit" (ex-edit))
("file" (ex-set-visited-file-name))
("g" "global")
("global" (ex-global nil) is-mashed)
("goto" (ex-goto))
("help" (ex-help))
("join" (ex-line "join"))
("k" (ex-mark) one-letter)
("kmark" (ex-mark))
("m" "move")
("make" (ex-compile))
; old viper doesn't specify a default for "ma" so leave it undefined
("map" (ex-map))
("mark" (ex-mark))
("move" (ex-copy t))
("next" (ex-next ex-cycle-other-window))
("p" "print")
("preserve" (ex-preserve))
("print" (ex-print))
("put" (ex-put))
("pwd" (ex-pwd))
("quit" (ex-quit))
("r" "read")
("re" "read")
("read" (ex-read))
("recover" (ex-recover))
("rewind" (ex-rewind))
("s" "substitute")
("su" "substitute")
("sub" "substitute")
("set" (ex-set))
("shell" (ex-shell))
("source" (ex-source))
("stop" (suspend-emacs))
("sr" (ex-substitute t t))
("submitReport" (viper-submit-report))
("substitute" (ex-substitute) is-mashed)
("suspend" (suspend-emacs))
("t" "transfer")
("tag" (ex-tag))
("transfer" (ex-copy nil))
("u" "undo")
("un" "undo")
("undo" (viper-undo))
("unmap" (ex-unmap))
("v" "vglobal")
("version" (viper-version))
("vglobal" (ex-global t) is-mashed)
("visual" (ex-edit))
("w" "write")
("wq" (ex-write t))
("write" (ex-write nil))
("xit" (ex-write t))
("yank" (ex-yank))
("~" (ex-substitute t t))
("append" (ex-cmd-obsolete "append"))
("change" (ex-cmd-obsolete "change"))
("insert" (ex-cmd-obsolete "insert"))
("open" (ex-cmd-obsolete "open"))
("list" (ex-cmd-not-yet "list"))
("z" (ex-cmd-not-yet "z"))
("#" (ex-cmd-not-yet "#"))
("abbreviate" (error "`%s': Vi abbreviations are obsolete. Use the more powerful Emacs abbrevs" ex-token))
("unabbreviate" (error "`%s': Vi abbreviations are obsolete. Use the more powerful Emacs abbrevs" ex-token))
))
;; No code should touch anything in the alist entry! (other than the name,
;; "car entry", of course) This way, changing this data structure
;; requires changing only the following ex-cmd functions...
;; Returns cmd if the command may be jammed right up against its
;; arguments, nil if there must be a space.
;; examples of mashable commands: g// g!// v// s// sno// sm//
(defun ex-cmd-is-mashed-with-args (cmd)
(if (eq 'is-mashed (car (nthcdr 2 cmd))) cmd))
;; Returns true if this is a one-letter command that may be followed
;; by anything, no whitespace needed. This is a special-case for ":k".
(defun ex-cmd-is-one-letter (cmd)
(if (eq 'one-letter (car (nthcdr 2 cmd))) cmd))
;; Executes the function associated with the command
(defun ex-cmd-execute (cmd)
(eval (cadr cmd)))
;; If this is a one-letter magic command, splice in args.
(defun ex-splice-args-in-1-letr-cmd (key list)
(let ((oneletter (ex-cmd-is-one-letter (assoc (substring key 0 1) list))))
(if oneletter
(list key
(append (cadr oneletter)
(if (< 1 (length key)) (list (substring key 1))))
(car (cdr (cdr oneletter))) ))
))
;; Returns the alist entry for the appropriate key.
;; Tries to complete the key before using it in the alist.
;; If there is no appropriate key (no match or duplicate matches) return nil
(defun ex-cmd-assoc (key list)
(let ((entry (try-completion key list))
result)
(setq result (cond
((eq entry t) (assoc key list))
((stringp entry) (or (ex-splice-args-in-1-letr-cmd key list)
(assoc entry list)))
((eq entry nil) (ex-splice-args-in-1-letr-cmd key list))
(t nil)
))
;; If we end up with an alias, look up the alias...
(if (stringp (cadr result))
(setq result (ex-cmd-assoc (cadr result) list)))
;; and return the corresponding alist entry
result
))
;; A-list of Ex variables that can be set using the :set command.
(defconst ex-variable-alist
'(("wrapscan") ("ws") ("wrapmargin") ("wm")
("tabstop-global") ("ts-g") ("tabstop") ("ts")
("showmatch") ("sm") ("shiftwidth") ("sw") ("shell") ("sh")
("readonly") ("ro")
("nowrapscan") ("nows") ("noshowmatch") ("nosm")
("noreadonly") ("noro") ("nomagic") ("noma")
("noignorecase") ("noic")
("noautoindent-global") ("noai-g") ("noautoindent") ("noai")
("magic") ("ma") ("ignorecase") ("ic")
("autoindent-global") ("ai-g") ("autoindent") ("ai")
("all")
))
;; 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)
;; This flag is supposed to be set only by `#', `print', and `list',
;; none of which is implemented. So, it and the pieces of the code it
;; controls are dead weight. We keep it just in case this might be
;; needed in the future.
(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 indicating that :global Ex command is being executed.
(defvar ex-g-flag nil)
;; Flag indicating that :vglobal Ex command is being executed.
(defvar ex-g-variant nil)
;; Marks to operate on during a :global Ex command.
(defvar ex-g-marks 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)
(defcustom ex-unix-type-shell
(let ((case-fold-search t))
(and (stringp shell-file-name)
(string-match
(concat
"\\("
"csh$\\|csh.exe$"
"\\|"
"ksh$\\|ksh.exe$"
"\\|"
"^sh$\\|sh.exe$"
"\\|"
"[^a-z]sh$\\|[^a-z]sh.exe$"
"\\|"
"bash$\\|bash.exe$"
"\\)")
shell-file-name)))
"Is the user using a unix-type shell under a non-OS?"
:type 'boolean
:group 'viper-ex)
(defcustom ex-unix-type-shell-options
(let ((case-fold-search t))
(if ex-unix-type-shell
(cond ((string-match "\\(csh$\\|csh.exe$\\)" shell-file-name)
"-f") ; csh: do it fast
((string-match "\\(bash$\\|bash.exe$\\)" shell-file-name)
"-noprofile") ; bash: ignore .profile
)))
"Options to pass to the Unix-style shell.
Don't put `-c' here, as it is added automatically."
:type '(choice (const nil) string)
:group 'viper-ex)
(defcustom ex-compile-command "make"
"The command to run when the user types :make."
:type 'string
:group 'viper-ex)
(defcustom viper-glob-function
(cond (ex-unix-type-shell 'viper-glob-unix-files)
(viper-ms-style-os-p 'viper-glob-mswindows-files) ; Microsoft OS
(t 'viper-glob-unix-files) ; presumably UNIX
)
"Expand the file spec containing wildcard symbols.
The default tries to set this variable to work with Unix, Windows,
and OS/2.
However, if it doesn't work right for some types of Unix shells or some OS,
the user should supply the appropriate function and set this variable to the
corresponding function symbol."
:type 'symbol
:group 'viper-ex)
;; 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)
(defvar ex-cmdfile-args "")
;; flag used in viper-ex-read-file-name to indicate that we may be reading
;; multiple file names. Used for :edit and :next
(defvar viper-keep-reading-filename nil)
(defcustom 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."
:type 'boolean
:group 'viper-ex)
(defcustom ex-cycle-through-non-files nil
"Cycle through *scratch* and other buffers that don't visit any file."
:type 'boolean
:group 'viper-ex)
;; Last shell command executed with :! command.
(defvar viper-ex-last-shell-com nil)
;; Indicates if Minibuffer was exited temporarily in Ex-command.
(defvar viper-incomplete-ex-cmd nil)
;; Remembers the last ex-command prompt.
(defvar viper-last-ex-prompt "")
;; Get a complete ex command
(defun viper-get-ex-com-subr ()
(let (cmd 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)))
(setq cmd (ex-cmd-assoc ex-token ex-token-alist))
(if cmd
(setq ex-token (car cmd))
(setq ex-token-type 'non-command))
))
;; Get an ex-token which is either an address or a command.
;; A token has a type, \(command, address, end-mark\), and a value
(defun viper-get-ex-token ()
(save-window-excursion
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-ex-work-buf)
(skip-chars-forward " \t|")
(let ((case-fold-search t))
(cond ((looking-at "#")
(setq ex-token-type 'command)
(setq ex-token (char-to-string (following-char)))
(forward-char 1))
((looking-at "[a-z]") (viper-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-number (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 viper-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 viper-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 (viper-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 (viper-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 viper-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 viper-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.*"
;; don't jump up in :s command
"\\|" "^[ \t]*\\([`'][a-z]\\|[.,%]\\)*[ \t]*su.*"
"\\|" "^[ \t]*\\([`'][a-z]\\|[.,%]\\)*[ \t]*s[^a-z].*"
"\\|" "['`][a-z][ \t]*"
;; r! assumes that the next one is a shell command
"\\|" "\\(r\\|re\\|rea\\|read\\)[ \t]*!"
;; w ! assumes that the next one is a shell command
"\\|" "\\(w\\|wr\\|wri\\|writ.?\\)[ \t]+!"
"\\|" "![ \t]*[a-zA-Z].*"
"\\)"
"!*")))
(save-window-excursion ;; put cursor at the end of the Ex working buffer
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-ex-work-buf)
(goto-char (point-max)))
(cond ((viper-looking-back quit-regex1) (exit-minibuffer))
((viper-looking-back stay-regex) (insert " "))
((viper-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)
(viper-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
(viper-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 can be surprises.
(if (or (viper-looking-back "[a-zA-Z!=>&~][ \t]*[/?]*[ \t]*")
(viper-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
(looking-at "[^ \t\n\C-m]"))
nil
(with-output-to-temp-buffer "*Completions*"
(display-completion-list
(viper-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
(viper-tmp-insert-at-eob " (Sole completion)"))
((eq completion-result nil)
(viper-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
(viper-filter-alist (concat "^" completion-result)
ex-token-alist)))
(if (> (length compl-list) 1)
(with-output-to-temp-buffer "*Completions*"
(display-completion-list
(viper-alist-to-list (reverse compl-list)))))))
)))
;; Read Ex commands
;; ARG is a prefix argument. If given, the ex command runs on the region
;;(without the user having to specify the address :a,b
;; STRING is the command to execute. If nil, then Viper asks you to enter the
;; command.
(defun viper-ex (arg &optional string)
(interactive "P")
(or string
(setq ex-g-flag nil
ex-g-variant nil))
(let* ((map (copy-keymap minibuffer-local-map))
(address nil)
(cont t)
(dot (point))
reg-beg-line reg-end-line
reg-beg reg-end
initial-str
prev-token-type com-str)
(viper-add-keymap viper-ex-cmd-map map)
(if arg
(progn
(viper-enlarge-region (mark t) (point))
(if (> (point) (mark t))
(setq reg-beg (mark t)
reg-end (point))
(setq reg-end (mark t)
reg-beg (point)))
(save-excursion
(goto-char reg-beg)
(setq reg-beg-line (1+ (count-lines (point-min) (point)))
reg-end-line
(+ reg-beg-line (count-lines reg-beg reg-end) -1)))))
(if reg-beg-line
(setq initial-str (format "%d,%d" reg-beg-line reg-end-line)))
(setq com-str
(if string
(concat initial-str string)
(viper-read-string-with-history
":"
initial-str
'viper-ex-history
;; no default when working on region
(if initial-str
nil
(car viper-ex-history))
map
(if initial-str
" [Type command to execute on current region]"))))
(save-window-excursion
;; just a precaution
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-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
(viper-get-ex-token)
(cond ((memq ex-token-type '(command end-mark))
(if address (setq ex-addresses (cons address ex-addresses)))
(viper-deactivate-mark)
(let ((cmd (ex-cmd-assoc ex-token ex-token-alist)))
(if (null cmd)
(error "`%s': %s" ex-token viper-BadExCommand))
(ex-cmd-execute cmd)
(if (or (ex-cmd-is-mashed-with-args cmd)
(ex-cmd-is-one-letter cmd))
(setq cont nil)
(save-excursion
(save-window-excursion
(setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-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 viper-SpuriousText)))
)))
))
((eq ex-token-type 'non-command)
(error "`%s': %s" ex-token viper-BadExCommand))
((eq ex-token-type 'whole)
(setq address nil)
(setq ex-addresses
(if ex-addresses
(cons (point-max) ex-addresses)
(cons (point-max) (cons (point-min) ex-addresses)))))
((eq ex-token-type 'comma)
(if (eq prev-token-type 'whole)
(setq address (point-min)))
(setq ex-addresses
(cons (if (null address) (point) address) ex-addresses)))
((eq ex-token-type 'semi-colon)
(if (eq prev-token-type 'whole)
(setq address (point-min)))
(if address (setq dot address))
(setq ex-addresses
(cons (if (null address) (point) address) ex-addresses)))
(t (let ((ans (viper-get-ex-address-subr address dot)))
(if ans (setq address ans)))))
(setq prev-token-type ex-token-type))))
;; Get a regular expression and set `ex-variant', if found
;; Viper doesn't parse the substitution or search patterns.
;; In particular, it doesn't expand ~ into the last substitution.
(defun viper-get-ex-pat ()
(save-window-excursion
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-ex-work-buf)
(skip-chars-forward " \t")
(if (looking-at "!")
;; this is probably a variant command r!
(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)))
(cond ((string-match "[0-9A-Za-z]" (format "%c" c))
(error
"Global regexp must be inside matching non-alphanumeric chars"))
((= c ??) (error "`?' is not an allowed pattern delimiter here")))
(if (looking-at "[^\\\\\n]")
(progn
(forward-char 1)
(set-mark (point))
(let ((cont t))
;; the use of eobp instead of eolp permits the use of newlines in
;; pat2 in s/pat1/pat2/
(while (and (not (eobp)) 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 (viper-looking-back
(format "[^\\\\]\\(\\\\\\\\\\)*\\\\%c" c)))
(setq cont nil)
;; we are at an escaped delimiter: unescape it and continue
(delete-char -2)
(insert c)
(if (eolp)
;; if at eol, exit loop and go to next line
;; later, delim will be inserted at the end
(progn
(setq cont nil)
(forward-char))))
))
(setq ex-token
(if (= (mark t) (point)) ""
(buffer-substring (1- (point)) (mark t))))
(backward-char 1)
;; if the user didn't insert the final pattern delimiter, we're
;; at newline now. In this case, insert the initial delimiter
;; specified in variable c
(if (eolp)
(progn
(insert c)
(backward-char 1)))
)
(setq ex-token nil))
c)))
;; Get an Ex option g or c
(defun viper-get-ex-opt-gc (c)
(save-window-excursion
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-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))))
;; Compute default addresses. WHOLE-FLAG means use the whole buffer
(defun viper-default-ex-addresses (&optional whole-flag)
(cond ((null ex-addresses)
(setq ex-addresses
(if whole-flag
(list (point-max) (point-min))
(list (point) (point)))))
((null (cdr ex-addresses))
(setq ex-addresses
(cons (car ex-addresses) ex-addresses)))))
;; Get an ex-address as a marker and set ex-flag if a flag is found
(defun viper-get-ex-address ()
(let ((address (point-marker))
(cont t))
(setq ex-token "")
(setq ex-flag nil)
(while cont
(viper-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 viper-SpuriousText))
(t (let ((ans (viper-get-ex-address-subr address (point-marker))))
(if ans (setq address ans))))))
address))
;; Returns an address as a point
(defun viper-get-ex-address-subr (old-address dot)
(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)
(save-excursion
(goto-char (1- (point-max)))
(setq address (point-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
(viper-register-to-point
(viper-int-to-char (1+ (- ex-token ?a))) 'enforce-buffer)))
(setq address (point-marker)))))
address))
;; Search pattern and set address
;; Doesn't wrap around. Should it?
(defun ex-search-address (forward)
(if (string= ex-token "")
(if (null viper-s-string)
(error viper-NoPrevSearch)
(setq ex-token viper-s-string))
(setq viper-s-string ex-token))
(if forward
(progn
(forward-line 1)
(re-search-forward ex-token))
(forward-line -1)
(re-search-backward ex-token)))
;; Get a buffer name and set `ex-count' and `ex-flag' if found
(defun viper-get-ex-buffer ()
(setq ex-buffer nil)
(setq ex-count nil)
(setq ex-flag nil)
(save-window-excursion
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-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-number (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 viper-SpuriousText))))
(defun viper-get-ex-count ()
(setq ex-variant nil
ex-count nil
ex-flag nil)
(save-window-excursion
(setq viper-ex-work-buf (get-buffer-create viper-ex-work-buf-name))
(set-buffer viper-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-number (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))) viper-BadExCommand))))
;; Expand \% and \# in ex command
(defun ex-expand-filsyms (cmd buf)
(let (cf pf ret)
(with-current-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 `#'"))
(with-current-buffer (get-buffer-create viper-ex-tmp-buf-name)
(erase-buffer)
(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 (viper-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)))
(message "%s" ret))
ret))
;; Get a file name and set `ex-variant', `ex-append' and `ex-offset' if found
;; If it is r!, then get the command name and whatever args
(defun viper-get-ex-file ()
(let (prompt)
(setq ex-file nil
ex-variant nil
ex-append nil
ex-offset nil
ex-cmdfile nil
ex-cmdfile-args "")
(save-excursion
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(skip-chars-forward " \t")
(if (looking-at "!")
(if (and (not (viper-looking-back "[ \t]"))
;; read doesn't have a corresponding :r! form, so ! is
;; immediately interpreted as a shell command.
(not (string= ex-token "read")))
(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" "next"))
(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 viper-incomplete-ex-cmd nil)
(setq ex-cmdfile-args
(substring ex-file (match-end 0) 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 viper-last-ex-prompt prompt)
;; If we just finished reading command, redisplay prompt
(if viper-incomplete-ex-cmd
(setq ex-file (viper-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 viper-complete-filename-or-exit ()
(interactive)
(setq viper-keep-reading-filename t)
;; don't exit if directory---ex-commands don't
(cond ((ex-cmd-accepts-multiple-files-p ex-token) (exit-minibuffer))
;; apparently the argument to an Ex command is
;; supposed to be a shell command
((viper-looking-back "^[ \t]*!.*")
(setq ex-cmdfile t)
(insert " "))
(t
(setq ex-cmdfile nil)
(minibuffer-complete-word))))
(defun viper-handle-! ()
(interactive)
(if (and (string=
(buffer-string) (viper-abbreviate-file-name default-directory))
(member ex-token '("read" "write")))
(erase-buffer))
(insert "!"))
(defun ex-cmd-accepts-multiple-files-p (token)
(member token '("edit" "next" "Next")))
;; Read file name from the minibuffer in an ex command.
;; If user doesn't enter anything, then "" is returned, i.e., the
;; prompt-directory is not returned.
(defun viper-ex-read-file-name (prompt)
(let* ((str "")
(minibuffer-local-completion-map
(copy-keymap minibuffer-local-completion-map))
beg end cont val)
(viper-add-keymap ex-read-filename-map
(if (featurep 'emacs)
minibuffer-local-completion-map
read-file-name-map))
(setq cont (setq viper-keep-reading-filename t))
(while cont
(setq viper-keep-reading-filename nil
val (read-file-name (concat prompt str) nil default-directory))
(setq val (expand-file-name val))
(if (and (string-match " " val)
(ex-cmd-accepts-multiple-files-p ex-token))
(setq val (concat "\"" val "\"")))
(setq str (concat str (if (equal val "") "" " ")
val (if (equal val "") "" " ")))
;; Only edit, next, and Next commands accept multiple files.
;; viper-keep-reading-filename is set in the anonymous function that is
;; bound to " " in ex-read-filename-map.
(setq cont (and viper-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 viper-last-ex-prompt
(concat viper-last-ex-prompt " !")))))
(substring str (or beg 0) end)))
(defun viper-undisplayed-files ()
(mapcar
(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 (viper-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 " *viper-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"))
(viper-read-event))))))
;; Ex cd command. Default directory of this buffer changes
(defun ex-cd ()
(viper-get-ex-file)
(if (string= ex-file "")
(setq ex-file "~"))
(setq default-directory (file-name-as-directory (expand-file-name ex-file))))
;; Ex copy and move command. DEL-FLAG means delete
(defun ex-copy (del-flag)
(viper-default-ex-addresses)
(let ((address (viper-get-ex-address))
(end (car ex-addresses)) (beg (car (cdr ex-addresses))))
(goto-char end)
(save-excursion
(push-mark beg t)
(viper-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 confirm] ")
(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))))
;; Ex delete command
(defun ex-delete ()
(viper-default-ex-addresses)
(viper-get-ex-buffer)
(let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
(if (> beg end) (error viper-FirstAddrExceedsSecond))
(save-excursion
(viper-enlarge-region beg end)
(exchange-point-and-mark)
(if ex-count
(progn
(set-mark (point))
(forward-line (1- ex-count)))
(set-mark end))
(viper-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 confirm] ")
(quit
(save-excursion (kill-buffer " *delete text*"))
(error "Viper bell")))
(save-excursion (kill-buffer " *delete text*")))
(if ex-buffer
(cond ((viper-valid-register ex-buffer '(Letter))
(viper-append-to-register
(downcase ex-buffer) (point) (mark t)))
((viper-valid-register ex-buffer)
(copy-to-register ex-buffer (point) (mark t) nil))
(t (error viper-InvalidRegister ex-buffer))))
(kill-region (point) (mark t))))))
;; 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
(defun ex-edit (&optional file)
(if (not file)
(viper-get-ex-file))
(cond ((and (string= ex-file "") buffer-file-name)
(setq ex-file (viper-abbreviate-file-name (buffer-file-name))))
((string= ex-file "")
(error viper-NoFileSpecified)))
(let (msg do-edit)
(if buffer-file-name
(cond ((buffer-modified-p)
(setq msg
(format "Buffer %s is modified. Discard changes? "
(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
;; this also does shell-style globbing
(ex-find-file
;; replace # and % with the previous/current file
(ex-expand-filsyms ex-file (current-buffer)))
(or (eq major-mode 'dired-mode)
(viper-change-state-to-vi))
(goto-char (point-min)))
(switch-to-buffer file))
(if ex-offset
(progn
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(delete-region (point-min) (point-max))
(insert ex-offset "\n")
(goto-char (point-min)))
(goto-char (viper-get-ex-address))
(beginning-of-line)))
(ex-fixup-history viper-last-ex-prompt ex-file))
;; Find-file FILESPEC if it appears to specify a single file.
;; Otherwise, assume that FILESPEC is a wildcard.
;; In this case, split it into substrings separated by newlines.
;; Each line is assumed to be a file name.
(defun ex-find-file (filespec)
(let ((nonstandard-filename-chars "[^-a-zA-Z0-9_./,~$\\]"))
(cond ((file-exists-p filespec) (find-file filespec))
((string-match nonstandard-filename-chars filespec)
(mapcar 'find-file (funcall viper-glob-function filespec)))
(t (find-file filespec)))
))
;; Ex global command
;; This is executed in response to:
;; :global "pattern" ex-command
;; :vglobal "pattern" ex-command
;; :global executes ex-command on all lines matching <pattern>
;; :vglobal executes ex-command on all lines that don't match <pattern>
;;
;; With VARIANT nil, this functions executes :global
;; With VARIANT t, executes :vglobal
(defun ex-global (variant)
(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)))
(viper-get-ex-pat)
(if (null ex-token)
(error "`%s': Missing regular expression" gcommand)))
(if (string= ex-token "")
(if (null viper-s-string)
(error viper-NoPrevSearch)
(setq ex-g-pat viper-s-string))
(setq ex-g-pat ex-token
viper-s-string ex-token))
(if (null ex-addresses)
(setq ex-addresses (list (point-max) (point-min)))
(viper-default-ex-addresses))
(setq ex-g-marks nil)
(let ((mark-count 0)
(end (car ex-addresses))
(beg (car (cdr ex-addresses)))
com-str)
(if (> beg end) (error viper-FirstAddrExceedsSecond))
(save-excursion
(viper-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) (viper-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 ex-g-marks (cons (point-marker) ex-g-marks)))))
(beginning-of-line)
(if (bobp) (setq cont nil)
(forward-line -1)
(end-of-line)))))
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
;; com-str is the command string, i.e., g/pattern/ or v/pattern'
(setq com-str (buffer-substring (1+ (point)) (1- (point-max)))))
(while ex-g-marks
(goto-char (car ex-g-marks))
(viper-ex nil com-str)
(setq mark-count (1- mark-count))
(setq ex-g-marks (cdr ex-g-marks)))))
;; Ex goto command
(defun ex-goto ()
(if (null ex-addresses)
(setq ex-addresses (cons (point) nil)))
(push-mark (point) t)
(goto-char (car ex-addresses))
(beginning-of-line)
)
;; Ex line commands. COM is join, shift-right or shift-left
(defun ex-line (com)
(viper-default-ex-addresses)
(viper-get-ex-count)
(let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))) point)
(if (> beg end) (error viper-FirstAddrExceedsSecond))
(save-excursion
(viper-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 " *join text*"
(princ (buffer-substring (point) (mark t))))
(condition-case nil
(progn
(read-string "[Hit return to confirm] ")
(ex-line-subr com (point) (mark t)))
(quit (ding)))
(save-excursion (kill-buffer " *join 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") viper-shift-width (- viper-shift-width)))
(goto-char (max beg end))
(end-of-line)
(viper-forward-char-carefully))))
;; Ex mark command
;; Sets the mark to the current point.
;; If name is omitted, get the name straight from the work buffer."
(defun ex-mark (&optional name)
(let (char)
(if (null ex-addresses)
(setq ex-addresses
(cons (point) nil)))
(if name
(if (eq 1 (length name))
(setq char (string-to-char name))
(error "`%s': Spurious text \"%s\" after mark name"
name (substring name 1)))
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(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 viper-SpuriousText)))
(error "`%s' requires a following letter" ex-token))))
(save-excursion
(goto-char (car ex-addresses))
(point-to-register (viper-int-to-char (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
(viper-get-ex-file)
(if (or (char-or-string-p ex-offset)
(and (not (string= "" ex-file))
(not (string-match "^[0-9]+$" ex-file))))
(progn
(ex-edit t)
(throw 'ex-edit nil))
(setq count (string-to-number ex-file))
(if (= count 0) (setq count 1))
(if (< count 0) (error "Usage: `next <count>' (count >= 0)"))))
(setq count 1))
(setq l (viper-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 (and (car l) (get-file-buffer (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)
;; this puts "next <count>" in the ex-command history
(ex-fixup-history viper-last-ex-prompt ex-file))
(error "Not that many undisplayed files")))))))
(defun ex-next-related-buffer (direction &optional no-recursion)
(viper-ring-rotate1 viper-related-files-and-buffers-ring direction)
(let ((file-or-buffer-name
(viper-current-ring-item viper-related-files-and-buffers-ring))
(old-ring viper-related-files-and-buffers-ring)
(old-win (selected-window))
skip-rest buf wind)
(or (and (ring-p viper-related-files-and-buffers-ring)
(> (ring-length viper-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 (viper-buffer-live-p buf))
(error "Didn't find buffer %S or file %S"
file-or-buffer-name
(viper-abbreviate-file-name
(expand-file-name file-or-buffer-name))))
(if (equal buf (current-buffer))
(or no-recursion
;; try again
(progn
(setq skip-rest t)
(ex-next-related-buffer direction 'norecursion))))
(if skip-rest
()
;; setup buffer
(if (setq wind (viper-get-visible-buffer-window buf))
()
(setq wind (get-lru-window (if (featurep 'xemacs) nil 'visible)))
(set-window-buffer wind buf))
(if (viper-window-display-p)
(progn
(raise-frame (window-frame wind))
(if (equal (window-frame wind) (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)))
(with-current-buffer buf
(setq viper-related-files-and-buffers-ring old-ring))
(setq viper-local-search-start-marker (point-marker))
)))
;; Force auto save
(defun ex-preserve ()
(message "Autosaving all buffers that need to be saved...")
(do-auto-save t))
;; Ex put
(defun ex-put ()
(let ((point (if (null ex-addresses) (point) (car ex-addresses))))
(viper-get-ex-buffer)
(setq viper-use-register ex-buffer)
(goto-char point)
(if (bobp) (viper-Put-back 1) (viper-put-back 1))))
;; Ex print working directory
(defun ex-pwd ()
(message "%s" default-directory))
;; Ex quit command
(defun ex-quit ()
;; skip "!", if it is q!. In Viper q!, w!, etc., behave as q, w, etc.
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(if (looking-at "!") (forward-char 1)))
(if (< viper-expert-level 3)
(save-buffers-kill-emacs)
(kill-buffer (current-buffer))))
;; Ex read command
;; ex-read doesn't support wildcards, because file completion is a better
;; mechanism. We also don't support # and % (except in :r <shell-command>
;; because file history is a better mechanism.
(defun ex-read ()
(viper-get-ex-file)
(let ((point (if (null ex-addresses) (point) (car ex-addresses)))
command)
(goto-char point)
(viper-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 viper-NoFileSpecified))
(setq ex-file buffer-file-name)))
(if ex-cmdfile
(progn
(setq command
;; replace # and % with the previous/current file
(ex-expand-filsyms
(concat (shell-quote-argument ex-file) ex-cmdfile-args)
(current-buffer)))
(shell-command command t))
(insert-file-contents ex-file)))
(ex-fixup-history viper-last-ex-prompt ex-file ex-cmdfile-args))
;; this function fixes ex-history for some commands like ex-read, ex-edit
(defun ex-fixup-history (&rest args)
(setq viper-ex-history
(cons (mapconcat 'identity args " ") (cdr viper-ex-history))))
;; Ex recover from emacs \#file\#
(defun ex-recover ()
(viper-get-ex-file)
(if (or ex-append ex-offset)
(error "`recover': %s" viper-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))
;; Tell that `rewind' is obsolete and to use `:next count' instead
(defun ex-rewind ()
(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 (viper-set-unread-command-events
(ex-get-inline-cmd-args "[ \t]*[a-zA-Z]*[ \t]*" nil "\C-m"))
(progn
(setq batch t)
(viper-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> [= <Value>]")
;; if there are unread events, don't wait
(or (viper-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]+'viper-insert-state-hook[ \t]+'turn-on-auto-fill.*)")
actual-lisp-cmd lisp-cmd-del-pattern
val2 orig-var)
(setq orig-var var)
(cond ((string= var "all")
(setq ask-if-save nil
set-cmd nil))
((member var '("ai" "autoindent"))
(setq var "viper-auto-indent"
set-cmd "setq"
ask-if-save nil
val "t"))
((member var '("ai-g" "autoindent-global"))
(kill-local-variable 'viper-auto-indent)
(setq var "viper-auto-indent"
set-cmd "setq-default"
val "t"))
((member var '("noai" "noautoindent"))
(setq var "viper-auto-indent"
ask-if-save nil
val "nil"))
((member var '("noai-g" "noautoindent-global"))
(kill-local-variable 'viper-auto-indent)
(setq var "viper-auto-indent"
set-cmd "setq-default"
val "nil"))
((member var '("ic" "ignorecase"))
(setq var "viper-case-fold-search"
val "t"))
((member var '("noic" "noignorecase"))
(setq var "viper-case-fold-search"
val "nil"))
((member var '("ma" "magic"))
(setq var "viper-re-search"
val "t"))
((member var '("noma" "nomagic"))
(setq var "viper-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 "viper-search-wrap-around"
val "t"))
((member var '("nows" "nowrapscan"))
(setq var "viper-search-wrap-around"
val "nil")))
(if (and set-cmd (eq val 0)) ; value must be set by the user
(let ((cursor-in-echo-area t))
(message ":set %s = <Value>" var)
;; if there are unread events, don't wait
(or (viper-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"
"ts-g" "tabstop-global"
"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 "viper-shift-width"))
((member var '("ts" "tabstop"))
;; make it take effect in curr buff and new bufs
(setq var "tab-width"
set-cmd "setq"
ask-if-save nil))
((member var '("ts-g" "tabstop-global"))
(kill-local-variable 'tab-width)
(setq var "tab-width"
set-cmd "setq-default"))
((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))
(if set-cmd
(setq actual-lisp-cmd
(format "\n(%s %s %s) %s" set-cmd var val auto-cmd-label)
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 "
viper-custom-file-name)))
(progn
(viper-save-string-in-file
actual-lisp-cmd viper-custom-file-name
;; del pattern
lisp-cmd-del-pattern)
(if (string= var "fill-column")
(if (> val2 0)
(viper-save-string-in-file
(concat
"(add-hook 'viper-insert-state-hook 'turn-on-auto-fill) "
auto-cmd-label)
viper-custom-file-name
delete-turn-on-auto-fill-pattern)
(viper-save-string-in-file
nil viper-custom-file-name delete-turn-on-auto-fill-pattern)
(viper-save-string-in-file
nil viper-custom-file-name
;; del pattern
lisp-cmd-del-pattern)
))
))
(if set-cmd
(message "%s %s %s"
set-cmd var
(if (string-match "^[ \t]*$" val)
(format "%S" val)
val)))
(if actual-lisp-cmd
(eval (car (read-from-string actual-lisp-cmd))))
(if (string= var "fill-column")
(if (> val2 0)
(auto-fill-mode 1)
(auto-fill-mode -1)))
(if (string= var "all") (ex-show-vars))
))
;; 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)
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(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)
(viper-forward-char-carefully)))
(goto-char end)
(buffer-substring beg end))))
;; Ex shell command
(defun ex-shell ()
(shell))
;; Viper help. Invokes Info
(defun ex-help ()
(condition-case nil
(progn
(pop-to-buffer (get-buffer-create "*info*"))
(info (if (featurep 'xemacs) "viper.info" "viper"))
(message "Type `i' to search for a specific topic"))
(error (beep 1)
(with-output-to-temp-buffer " *viper-info*"
(princ (format "
The Info file for Viper does not seem to be installed.
This file is part of the standard distribution of %sEmacs.
Please contact your system administrator. "
(if (featurep 'xemacs) "X" "")
))))))
;; Ex source command. Loads the file specified as argument or `~/.viper'
(defun ex-source ()
(viper-get-ex-file)
(if (string= ex-file "")
(load viper-custom-file-name)
(load ex-file)))
;; Ex substitute command
;; If REPEAT use previous regexp which is ex-reg-exp or viper-s-string
(defun ex-substitute (&optional repeat r-flag)
(let ((opt-g nil)
(opt-c nil)
(matched-pos nil)
(case-fold-search viper-case-fold-search)
delim pat repl)
(if repeat (setq ex-token nil) (setq delim (viper-get-ex-pat)))
(if (null ex-token)
(progn
(setq pat (if r-flag viper-s-string ex-reg-exp))
(or (stringp pat)
(error "No previous pattern to use in substitution"))
(setq repl ex-repl
delim (string-to-char pat)))
(setq pat (if (string= ex-token "") viper-s-string ex-token))
(setq viper-s-string pat
ex-reg-exp pat)
(setq delim (viper-get-ex-pat))
(if (null ex-token)
(setq ex-token ""
ex-repl "")
(setq repl ex-token
ex-repl ex-token)))
(while (viper-get-ex-opt-gc delim)
(if (string= ex-token "g") (setq opt-g t) (setq opt-c t)))
(viper-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
(viper-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)
(save-excursion
(end-of-line)
;; This move allows the use of newline as the last character in
;; the substitution pattern
(viper-forward-char-carefully)
(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)
(progn
(viper-put-on-search-overlay (match-beginning 0)
(match-end 0))
(y-or-n-p "Replace? ")))
(progn
(viper-hide-search-overlay)
(setq matched-pos (point))
(if (not (stringp repl))
(error "Can't perform Ex substitution: No previous replacement pattern"))
(replace-match repl t))))
(end-of-line)
(viper-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)
(progn
(viper-put-on-search-overlay (match-beginning 0)
(match-end 0))
(y-or-n-p "Replace? "))))
(progn
(viper-hide-search-overlay)
(setq matched-pos (point))
(if (not (stringp repl))
(error "Can't perform Ex substitution: No previous replacement pattern"))
(replace-match repl t)))
;;(end-of-line)
;;(viper-forward-char-carefully)
(goto-char eol-mark)
)))))
(if matched-pos (goto-char matched-pos))
(beginning-of-line)
(if opt-c (message "done"))))
;; Ex tag command
(defun ex-tag ()
(let (tag)
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(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))
(viper-change-state-to-emacs)
(condition-case conds
(progn
(if (string= tag "")
(find-tag ex-tag t)
(find-tag-other-window ex-tag))
(viper-change-state-to-vi))
(error
(viper-change-state-to-vi)
(viper-message-conditions conds)))))
;; Ex write command
;; ex-write doesn't support wildcards, because file completion is a better
;; mechanism. We also don't support # and %
;; because file history is a better mechanism.
(defun ex-write (q-flag)
(viper-default-ex-addresses t)
(viper-get-ex-file)
(let ((end (car ex-addresses))
(beg (car (cdr ex-addresses)))
(orig-buf (current-buffer))
;;(orig-buf-file-name (buffer-file-name))
;;(orig-buf-name (buffer-name))
;;(buff-changed-p (buffer-modified-p))
temp-buf writing-same-file region
file-exists writing-whole-file)
(if (> beg end) (error viper-FirstAddrExceedsSecond))
(if ex-cmdfile
(progn
(viper-enlarge-region beg end)
(shell-command-on-region (point) (mark t)
(concat ex-file ex-cmdfile-args)))
(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)))
;; if ex-file is a directory use the file portion of the buffer file name
(if (and (file-directory-p ex-file)
buffer-file-name
(not (file-directory-p buffer-file-name)))
(setq ex-file
(concat (file-name-as-directory ex-file)
(file-name-nondirectory buffer-file-name))))
(setq file-exists (file-exists-p ex-file)
writing-same-file (string= ex-file (buffer-file-name)))
;; do actual writing
(if (and writing-whole-file writing-same-file)
;; saving whole buffer in visited file
(if (not (buffer-modified-p))
(message "(No changes need to be saved)")
(viper-maybe-checkout (current-buffer))
(save-buffer)
(save-restriction
(widen)
(ex-write-info file-exists ex-file (point-min) (point-max))
))
;; writing to non-visited file and it already exists
(if (and file-exists (not writing-same-file)
(not (yes-or-no-p
(format "File %s exists. Overwrite? " ex-file))))
(error "Quit"))
;; writing a region or whole buffer to non-visited file
(unwind-protect
(save-excursion
(viper-enlarge-region beg end)
(setq region (buffer-substring (point) (mark t)))
;; create temp buffer for the region
(setq temp-buf (get-buffer-create " *ex-write*"))
(set-buffer temp-buf)
(if (featurep 'xemacs)
(set-visited-file-name ex-file)
(set-visited-file-name ex-file 'noquery))
(erase-buffer)
(if (and file-exists ex-append)
(insert-file-contents ex-file))
(goto-char (point-max))
(insert region)
;; ask user
(viper-maybe-checkout (current-buffer))
(setq selective-display nil)
(save-buffer)
(ex-write-info
file-exists ex-file (point-min) (point-max))
)
;; this must be under unwind-protect so that
;; temp-buf will be deleted in case of an error
(set-buffer temp-buf)
(set-buffer-modified-p nil)
(kill-buffer temp-buf)
;; buffer/region has been written, now take care of details
(set-buffer orig-buf)))
;; set the right file modification time
(if (and (buffer-file-name) writing-same-file)
(set-visited-file-modtime))
;; prevent loss of data if saving part of the buffer in visited file
(or writing-whole-file
(not writing-same-file)
(progn
(sit-for 2)
(message "Warning: you have saved only part of the buffer!")
(set-buffer-modified-p t)))
(if q-flag
(if (< viper-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"
(viper-abbreviate-file-name file-name)
(if exists "" " [New file]")
(count-lines beg (min (1+ end) (point-max)))
(- end beg)))
;; Ex yank command
(defun ex-yank ()
(viper-default-ex-addresses)
(viper-get-ex-buffer)
(let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
(if (> beg end) (error viper-FirstAddrExceedsSecond))
(save-excursion
(viper-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))
(viper-enlarge-region (point) (mark t))
(if ex-flag (error "`yank': %s" viper-SpuriousText))
(if ex-buffer
(cond ((viper-valid-register ex-buffer '(Letter))
(viper-append-to-register
(downcase ex-buffer) (point) (mark t)))
((viper-valid-register ex-buffer)
(copy-to-register ex-buffer (point) (mark t) nil))
(t (error viper-InvalidRegister ex-buffer))))
(copy-region-as-kill (point) (mark t)))))
;; Execute shell command
(defun ex-command ()
(let (command)
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(skip-chars-forward " \t")
(setq command (buffer-substring (point) (point-max)))
(end-of-line))
;; replace # and % with the previous/current file
(setq command (ex-expand-filsyms command (current-buffer)))
(if (and (> (length command) 0) (string= "!" (substring command 0 1)))
(if viper-ex-last-shell-com
(setq command
(concat viper-ex-last-shell-com (substring command 1)))
(error "No previous shell command")))
(setq viper-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)
(viper-enlarge-region (point) (mark t))
(shell-command-on-region (point) (mark t) command t))
(goto-char beg)))))
(defun ex-compile ()
"Reads args from the command line, then runs make with the args.
If no args are given, then it runs the last compile command.
Type 'mak ' (including the space) to run make with no args."
(let (args)
(with-current-buffer (setq viper-ex-work-buf
(get-buffer-create viper-ex-work-buf-name))
(setq args (buffer-substring (point) (point-max)))
(end-of-line))
;; Remove the newline that may (will?) be at the end of the args
(if (string= "\n" (substring args (1- (length args))))
(setq args (substring args 0 (1- (length args)))))
;; Run last command if no args given, else construct a new command.
(setq args
(if (string= "" args)
(if (boundp 'compile-command)
compile-command
ex-compile-command)
(concat ex-compile-command " " args)))
(compile args)
))
;; Print line number
(defun ex-line-no ()
(message "%d"
(1+ (count-lines
(point-min)
(if (null ex-addresses) (point-max) (car ex-addresses))))))
;; Give information on the file visited by the current buffer
(defun viper-info-on-file ()
(interactive)
(let ((pos1 (viper-line-pos 'start))
(pos2 (viper-line-pos 'end))
lines file info)
(setq lines (count-lines (point-min) (viper-line-pos 'end))
file (cond ((buffer-file-name)
(concat (viper-abbreviate-file-name (buffer-file-name)) ":"))
((buffer-file-name (buffer-base-buffer))
(concat (viper-abbreviate-file-name (buffer-file-name (buffer-base-buffer))) " (indirect buffer):"))
(t (concat (buffer-name) " [Not visiting any file]:")))
info (format "line=%d/%d pos=%d/%d col=%d %s"
(if (= pos1 pos2)
(1+ lines)
lines)
(count-lines (point-min) (point-max))
(point) (1- (point-max))
(1+ (current-column))
(if (buffer-modified-p) "[Modified]" "[Unchanged]")))
(if (< (+ 1 (length info) (length file))
(window-width (minibuffer-window)))
(message "%s" (concat file " " info))
(save-window-excursion
(with-output-to-temp-buffer " *viper-info*"
(princ (concat "\n" file "\n\n\t" info "\n\n")))
(let ((inhibit-quit t))
(viper-set-unread-command-events (viper-read-event)))
(kill-buffer " *viper-info*")))
))
;; Without arguments displays info on file. With an arg, sets the visited file
;; name to that arg
(defun ex-set-visited-file-name ()
(viper-get-ex-file)
(if (string= ex-file "")
(viper-info-on-file)
;; If ex-file is a directory, use the file portion of the buffer
;; file name (like ex-write). Do this even if ex-file is a
;; non-existent directory, since set-visited-file-name signals an
;; error on this condition, too.
(if (and (string= (file-name-nondirectory ex-file) "")
buffer-file-name
(not (file-directory-p buffer-file-name)))
(setq ex-file (concat (file-name-as-directory ex-file)
(file-name-nondirectory buffer-file-name))))
(set-visited-file-name ex-file)))
;; display all variables set through :set
(defun ex-show-vars ()
(with-output-to-temp-buffer " *viper-info*"
(princ (if viper-auto-indent
"autoindent (local)\n" "noautoindent (local)\n"))
(princ (if (default-value 'viper-auto-indent)
"autoindent (global) \n" "noautoindent (global) \n"))
(princ (if viper-case-fold-search "ignorecase\n" "noignorecase\n"))
(princ (if viper-re-search "magic\n" "nomagic\n"))
(princ (if buffer-read-only "readonly\n" "noreadonly\n"))
(princ (if blink-matching-paren "showmatch\n" "noshowmatch\n"))
(princ (if viper-search-wrap-around "wrapscan\n" "nowrapscan\n"))
(princ (format "shiftwidth \t\t= %S\n" viper-shift-width))
(princ (format "tabstop (local) \t= %S\n" tab-width))
(princ (format "tabstop (global) \t= %S\n" (default-value 'tab-width)))
(princ (format "wrapmargin (local) \t= %S\n"
(- (window-width) fill-column)))
(princ (format "wrapmargin (global) \t= %S\n"
(- (window-width) (default-value 'fill-column))))
(princ (format "shell \t\t\t= %S\n" (if (boundp 'explicit-shell-file-name)
explicit-shell-file-name
'none)))
))
(defun ex-print ()
(viper-default-ex-addresses)
(let ((end (car ex-addresses))
(beg (car (cdr ex-addresses))))
(if (> beg end) (error viper-FirstAddrExceedsSecond))
(save-excursion
(viper-enlarge-region beg end)
(if (or ex-g-flag ex-g-variant)
;; When executing a global command, collect output of each
;; print in viper-ex-print-buf.
(progn
(append-to-buffer viper-ex-print-buf (point) (mark t))
;; Is this the last mark for the global command?
(unless (cdr ex-g-marks)
(with-current-buffer viper-ex-print-buf
(ex-print-display-lines (buffer-string))
(erase-buffer))))
(ex-print-display-lines (buffer-substring (point) (mark t)))))))
(defun ex-print-display-lines (lines)
(cond
;; String doesn't contain a newline.
((not (string-match "\n" lines))
(message "%s" lines))
;; String contains only one newline at the end. Strip it off.
((= (string-match "\n" lines) (1- (length lines)))
(message "%s" (substring lines 0 -1)))
;; String spans more than one line. Use a temporary buffer.
(t
(save-current-buffer
(with-output-to-temp-buffer " *viper-info*"
(princ lines))))))
;;; viper-ex.el ends here
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