lisp/emulation/viper-ex.el

   1 ;;; viper-ex.el --- functions implementing the Ex commands for Viper
   2
   3 ;; Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 2, or (at your option)
  10 ;; any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 ;; Boston, MA 02111-1307, USA.
  21
  22 ;; Code
  23
  24 (provide 'viper-ex)
  25
  26 ;; Compiler pacifier
  27 (defvar read-file-name-map)
  28 (defvar vip-use-register)
  29 (defvar vip-s-string)
  30 (defvar vip-shift-width)
  31 (defvar vip-ex-history)
  32 (defvar vip-related-files-and-buffers-ring)
  33 (defvar vip-local-search-start-marker)
  34 (defvar viper-expert-level)
  35 (defvar vip-custom-file-name)
  36 (defvar vip-case-fold-search)
  37 (defvar explicit-shell-file-name)
  38
  39 ;; loading happens only in non-interactive compilation
  40 ;; in order to spare non-viperized emacs from being viperized
  41 (if noninteractive
  42     (eval-when-compile
  43       (let ((load-path (cons (expand-file-name ".") load-path)))
  44         (or (featurep 'viper-util)
  45             (load "viper-util.el" nil nil 'nosuffix))
  46         (or (featurep 'viper-keym)
  47             (load "viper-keym.el" nil nil 'nosuffix))
  48         (or (featurep 'viper-cmd)
  49             (load "viper-cmd.el" nil nil 'nosuffix))
  50         )))
  51 ;; end pacifier
  52
  53 (require 'viper-util)
  54
  55 (defgroup viper-ex nil
  56   "Viper support for Ex commands"
  57   :prefix "ex-"
  58   :group 'viper)
  59
  60
  61
  62 ;;; Variables
  63
  64 (defconst vip-ex-work-buf-name " *ex-working-space*")
  65 (defconst vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
  66 (defconst vip-ex-tmp-buf-name " *ex-tmp*")
  67
  68
  69 ;;; Variable completion in :set command
  70
  71 ;; The list of Ex commands. Used for completing command names.
  72 (defconst ex-token-alist
  73   '(("!") ("=") (">") ("&") ("~")
  74     ("yank") ("xit") ("WWrite") ("Write") ("write") ("wq") ("visual")
  75     ("version") ("vglobal") ("unmap") ("undo") ("tag") ("transfer") ("suspend")
  76     ("substitute") ("submitReport") ("stop")  ("sr") ("source") ("shell")
  77     ("set") ("rewind") ("recover") ("read") ("quit") ("pwd")
  78     ("put") ("preserve") ("PreviousRelatedFile") ("RelatedFile")
  79     ("next") ("Next") ("move") ("mark") ("map") ("kmark") ("join")
  80     ("help") ("goto") ("global") ("file") ("edit") ("delete") ("copy")
  81     ("chdir") ("cd") ("Buffer") ("buffer") ("args"))  )
  82
  83 ;; A-list of Ex variables that can be set using the :set command.
  84 (defconst ex-variable-alist
  85   '(("wrapscan") ("ws") ("wrapmargin") ("wm")
  86     ("tabstop-global") ("ts-g") ("tabstop") ("ts")
  87     ("showmatch") ("sm") ("shiftwidth") ("sw") ("shell") ("sh")
  88     ("readonly") ("ro")
  89     ("nowrapscan") ("nows") ("noshowmatch") ("nosm")
  90     ("noreadonly") ("noro") ("nomagic") ("noma")
  91     ("noignorecase") ("noic")
  92     ("noautoindent-global") ("noai-g") ("noautoindent") ("noai")
  93     ("magic") ("ma") ("ignorecase") ("ic")
  94     ("autoindent-global") ("ai-g") ("autoindent") ("ai")
  95     ("all")
  96     ))
  97
  98
  99
 100 ;; Token recognized during parsing of Ex commands (e.g., "read", "comma")
 101 (defvar ex-token nil)
 102
 103 ;; Type of token.
 104 ;; If non-nil, gives type of address; if nil, it is a command.
 105 (defvar ex-token-type nil)
 106
 107 ;; List of addresses passed to Ex command
 108 (defvar ex-addresses nil)
 109
 110 ;; It seems that this flag is used only for `#', `print', and `list', which
 111 ;; aren't implemented. Check later.
 112 (defvar ex-flag nil)
 113
 114 ;; "buffer" where Ex commands keep deleted data.
 115 ;; In Emacs terms, this is a register.
 116 (defvar ex-buffer nil)
 117
 118 ;; Value of ex count.
 119 (defvar ex-count nil)
 120
 121 ;; Flag indicating that :global Ex command is being executed.
 122 (defvar ex-g-flag nil)
 123 ;; Flag indicating that :vglobal Ex command is being executed.
 124 (defvar ex-g-variant nil)
 125
 126 ;; Save reg-exp used in substitute.
 127 (defvar ex-reg-exp nil)
 128
 129
 130 ;; Replace pattern for substitute.
 131 (defvar ex-repl nil)
 132
 133 ;; Pattern for global command.
 134 (defvar ex-g-pat nil)
 135
 136 (defcustom ex-unix-type-shell
 137   (let ((case-fold-search t))
 138     (and (stringp shell-file-name)
 139          (string-match
 140           (concat
 141            "\\("
 142            "csh$\\|csh.exe$"
 143            "\\|"
 144            "ksh$\\|ksh.exe$"
 145            "\\|"
 146            "^sh$\\|sh.exe$"
 147            "\\|"
 148            "[^a-z]sh$\\|[^a-z]sh.exe$"
 149            "\\|"
 150            "bash$\\|bash.exe$"
 151            "\\)")
 152           shell-file-name)))
 153   "Is the user using a unix-type shell under a non-OS?"
 154   :type 'string
 155   :group 'viper-ex)
 156
 157 (defcustom ex-unix-type-shell-options
 158   (let ((case-fold-search t))
 159     (if ex-unix-type-shell
 160         (cond ((string-match "\\(csh$\\|csh.exe$\\)" shell-file-name)
 161                "-f") ; csh: do it fast
 162               ((string-match "\\(bash$\\|bash.exe$\\)" shell-file-name)
 163                "-noprofile") ; bash: ignore .profile
 164               )))
 165   "Options to pass to the Unix-style shell.
 166 Don't put `-c' here, as it is added automatically."
 167   :type 'string
 168   :group 'viper-ex)
 169
 170 (defvar ex-nontrivial-find-file-function
 171   (cond (ex-unix-type-shell 'vip-ex-nontrivial-find-file-unix)
 172         ((eq system-type 'emx) 'vip-ex-nontrivial-find-file-ms) ; OS/2
 173         (vip-ms-style-os-p 'vip-ex-nontrivial-find-file-ms) ; a Microsoft OS
 174         (vip-vms-os-p 'vip-ex-nontrivial-find-file-unix) ; VMS
 175         (t  'vip-ex-nontrivial-find-file-unix) ; presumably UNIX
 176         ))
 177
 178 ;; Remembers the previous Ex tag.
 179 (defvar ex-tag nil)
 180
 181 ;; file used by Ex commands like :r, :w, :n
 182 (defvar ex-file nil)
 183
 184 ;; If t, tells Ex that this is a variant-command, i.e., w>>, r!, etc.
 185 (defvar ex-variant nil)
 186
 187 ;; Specified the offset of an Ex command, such as :read.
 188 (defvar ex-offset nil)
 189
 190 ;; Tells Ex that this is a w>> command.
 191 (defvar ex-append nil)
 192
 193 ;; File containing the shell command to be executed at Ex prompt,
 194 ;; e.g., :r !date
 195 (defvar ex-cmdfile nil)
 196
 197 ;; flag used in vip-ex-read-file-name to indicate that we may be reading
 198 ;; multiple file names. Used for :edit and :next
 199 (defvar vip-keep-reading-filename nil)
 200
 201 (defcustom ex-cycle-other-window t
 202   "*If t, :n and :b cycles through files and buffers in other window.
 203 Then :N and :B cycles in the current window. If nil, this behavior is
 204 reversed."
 205   :type 'boolean
 206   :group 'viper-ex)
 207
 208 (defcustom ex-cycle-through-non-files nil
 209   "*Cycle through *scratch* and other buffers that don't visit any file."
 210   :type 'boolean
 211   :group 'viper-ex)
 212
 213 ;; Last shell command executed with :! command.
 214 (defvar vip-ex-last-shell-com nil)
 215
 216 ;; Indicates if Minibuffer was exited temporarily in Ex-command.
 217 (defvar vip-incomplete-ex-cmd nil)
 218
 219 ;; Remembers the last ex-command prompt.
 220 (defvar vip-last-ex-prompt "")
 221
 222
 223 ;;; Code
 224
 225 ;; Check if ex-token is an initial segment of STR
 226 (defun vip-check-sub (str)
 227   (let ((length (length ex-token)))
 228     (if (and (<= length (length str))
 229              (string= ex-token (substring str 0 length)))
 230         (setq ex-token str)
 231       (setq ex-token-type 'non-command))))
 232
 233 ;; Get a complete ex command
 234 (defun vip-get-ex-com-subr ()
 235   (let (case-fold-search)
 236     (set-mark (point))
 237     (re-search-forward "[a-zA-Z][a-zA-Z]*")
 238     (setq ex-token-type 'command)
 239     (setq ex-token (buffer-substring (point) (mark t)))
 240     (exchange-point-and-mark)
 241     (cond ((looking-at "a")
 242            (cond ((looking-at "ab") (vip-check-sub "abbreviate"))
 243                  ((looking-at "ar") (vip-check-sub "args"))
 244                  (t (vip-check-sub "append"))))
 245           ((looking-at "h") (vip-check-sub "help"))
 246           ((looking-at "c")
 247            (cond ((looking-at "cd") (vip-check-sub "cd"))
 248                  ((looking-at "ch") (vip-check-sub "chdir"))
 249                  ((looking-at "co") (vip-check-sub "copy"))
 250                  (t (vip-check-sub "change"))))
 251           ((looking-at "d") (vip-check-sub "delete"))
 252           ((looking-at "b") (vip-check-sub "buffer"))
 253           ((looking-at "B") (vip-check-sub "Buffer"))
 254           ((looking-at "e")
 255            (if (looking-at "ex") (vip-check-sub "ex")
 256              (vip-check-sub "edit")))
 257           ((looking-at "f") (vip-check-sub "file"))
 258           ((looking-at "g") (vip-check-sub "global"))
 259           ((looking-at "i") (vip-check-sub "insert"))
 260           ((looking-at "j") (vip-check-sub "join"))
 261           ((looking-at "l") (vip-check-sub "list"))
 262           ((looking-at "m")
 263            (cond ((looking-at "map") (vip-check-sub "map"))
 264                  ((looking-at "mar") (vip-check-sub "mark"))
 265                  (t (vip-check-sub "move"))))
 266           ((looking-at "k[a-z][^a-z]")
 267            (setq ex-token "kmark")
 268            (forward-char 1)
 269            (exchange-point-and-mark))   ; this is canceled out by another
 270                                         ; exchange-point-and-mark at the end
 271           ((looking-at "k") (vip-check-sub "kmark"))
 272           ((looking-at "n") (if (looking-at "nu")
 273                                 (vip-check-sub "number")
 274                               (vip-check-sub "next")))
 275           ((looking-at "N") (vip-check-sub "Next"))
 276           ((looking-at "o") (vip-check-sub "open"))
 277           ((looking-at "p")
 278            (cond ((looking-at "pre") (vip-check-sub "preserve"))
 279                  ((looking-at "pu") (vip-check-sub "put"))
 280                  ((looking-at "pw") (vip-check-sub "pwd"))
 281                  (t (vip-check-sub "print"))))
 282           ((looking-at "P") (vip-check-sub "PreviousRelatedFile"))
 283           ((looking-at "R") (vip-check-sub "RelatedFile"))
 284           ((looking-at "q") (vip-check-sub "quit"))
 285           ((looking-at "r")
 286            (cond ((looking-at "rec") (vip-check-sub "recover"))
 287                  ((looking-at "rew") (vip-check-sub "rewind"))
 288                  (t (vip-check-sub "read"))))
 289           ((looking-at "s")
 290            (cond ((looking-at "se") (vip-check-sub "set"))
 291                  ((looking-at "sh") (vip-check-sub "shell"))
 292                  ((looking-at "so") (vip-check-sub "source"))
 293                  ((looking-at "sr") (vip-check-sub "sr"))
 294                  ((looking-at "st") (vip-check-sub "stop"))
 295                  ((looking-at "sus") (vip-check-sub "suspend"))
 296                  ((looking-at "subm") (vip-check-sub "submitReport"))
 297                  (t (vip-check-sub "substitute"))))
 298           ((looking-at "t")
 299            (if (looking-at "ta") (vip-check-sub "tag")
 300              (vip-check-sub "transfer")))
 301           ((looking-at "u")
 302            (cond ((looking-at "una") (vip-check-sub "unabbreviate"))
 303                  ((looking-at "unm") (vip-check-sub "unmap"))
 304                  (t (vip-check-sub "undo"))))
 305           ((looking-at "v")
 306            (cond ((looking-at "ve") (vip-check-sub "version"))
 307                  ((looking-at "vi") (vip-check-sub "visual"))
 308                  (t (vip-check-sub "vglobal"))))
 309           ((looking-at "w")
 310            (if (looking-at "wq") (vip-check-sub "wq")
 311              (vip-check-sub "write")))
 312           ((looking-at "W")
 313            (if (looking-at "WW")
 314                (vip-check-sub "WWrite")
 315              (vip-check-sub "Write")))
 316           ((looking-at "x") (vip-check-sub "xit"))
 317           ((looking-at "y") (vip-check-sub "yank"))
 318           ((looking-at "z") (vip-check-sub "z")))
 319     (exchange-point-and-mark)
 320     ))
 321
 322 ;; Get an ex-token which is either an address or a command.
 323 ;; A token has a type, \(command, address, end-mark\), and a value
 324 (defun vip-get-ex-token ()
 325   (save-window-excursion
 326     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 327     (set-buffer vip-ex-work-buf)
 328     (skip-chars-forward " \t|")
 329     (cond ((looking-at "#")
 330            (setq ex-token-type 'command)
 331            (setq ex-token (char-to-string (following-char)))
 332            (forward-char 1))
 333           ((looking-at "[a-z]") (vip-get-ex-com-subr))
 334           ((looking-at "\\.")
 335            (forward-char 1)
 336            (setq ex-token-type 'dot))
 337           ((looking-at "[0-9]")
 338            (set-mark (point))
 339            (re-search-forward "[0-9]*")
 340            (setq ex-token-type
 341                  (cond ((eq ex-token-type 'plus) 'add-number)
 342                        ((eq ex-token-type 'minus) 'sub-number)
 343                        (t 'abs-number)))
 344            (setq ex-token (string-to-int (buffer-substring (point) (mark t)))))
 345           ((looking-at "\\$")
 346            (forward-char 1)
 347            (setq ex-token-type 'end))
 348           ((looking-at "%")
 349            (forward-char 1)
 350            (setq ex-token-type 'whole))
 351           ((looking-at "+")
 352            (cond ((or (looking-at "+[-+]") (looking-at "+[\n|]"))
 353                   (forward-char 1)
 354                   (insert "1")
 355                   (backward-char 1)
 356                   (setq ex-token-type 'plus))
 357                  ((looking-at "+[0-9]")
 358                   (forward-char 1)
 359                   (setq ex-token-type 'plus))
 360                  (t
 361                   (error vip-BadAddress))))
 362           ((looking-at "-")
 363            (cond ((or (looking-at "-[-+]") (looking-at "-[\n|]"))
 364                   (forward-char 1)
 365                   (insert "1")
 366                   (backward-char 1)
 367                   (setq ex-token-type 'minus))
 368                  ((looking-at "-[0-9]")
 369                   (forward-char 1)
 370                   (setq ex-token-type 'minus))
 371                  (t
 372                   (error vip-BadAddress))))
 373           ((looking-at "/")
 374            (forward-char 1)
 375            (set-mark (point))
 376            (let ((cont t))
 377              (while (and (not (eolp)) cont)
 378                ;;(re-search-forward "[^/]*/")
 379                (re-search-forward "[^/]*\\(/\\|\n\\)")
 380                (if (not (vip-looking-back "[^\\\\]\\(\\\\\\\\\\)*\\\\/"))
 381                    (setq cont nil))))
 382            (backward-char 1)
 383            (setq ex-token (buffer-substring (point) (mark t)))
 384            (if (looking-at "/") (forward-char 1))
 385            (setq ex-token-type 'search-forward))
 386           ((looking-at "\\?")
 387            (forward-char 1)
 388            (set-mark (point))
 389            (let ((cont t))
 390              (while (and (not (eolp)) cont)
 391                ;;(re-search-forward "[^\\?]*\\?")
 392                (re-search-forward "[^\\?]*\\(\\?\\|\n\\)")
 393                (if (not (vip-looking-back "[^\\\\]\\(\\\\\\\\\\)*\\\\\\?"))
 394                    (setq cont nil))
 395                (backward-char 1)
 396                (if (not (looking-at "\n")) (forward-char 1))))
 397            (setq ex-token-type 'search-backward)
 398            (setq ex-token (buffer-substring (1- (point)) (mark t))))
 399           ((looking-at ",")
 400            (forward-char 1)
 401            (setq ex-token-type 'comma))
 402           ((looking-at ";")
 403            (forward-char 1)
 404            (setq ex-token-type 'semi-colon))
 405           ((looking-at "[!=><&~]")
 406            (setq ex-token-type 'command)
 407            (setq ex-token (char-to-string (following-char)))
 408            (forward-char 1))
 409           ((looking-at "'")
 410            (setq ex-token-type 'goto-mark)
 411            (forward-char 1)
 412            (cond ((looking-at "'") (setq ex-token nil))
 413                  ((looking-at "[a-z]") (setq ex-token (following-char)))
 414                  (t (error "Marks are ' and a-z")))
 415            (forward-char 1))
 416           ((looking-at "\n")
 417            (setq ex-token-type 'end-mark)
 418            (setq ex-token "goto"))
 419           (t
 420            (error vip-BadExCommand)))))
 421
 422 ;; Reads Ex command. Tries to determine if it has to exit because command
 423 ;; is complete or invalid. If not, keeps reading command.
 424 (defun ex-cmd-read-exit ()
 425   (interactive)
 426   (setq vip-incomplete-ex-cmd t)
 427   (let ((quit-regex1 (concat
 428                       "\\(" "set[ \t]*"
 429                       "\\|" "edit[ \t]*"
 430                       "\\|" "[nN]ext[ \t]*"
 431                       "\\|" "unm[ \t]*"
 432                       "\\|" "^[ \t]*rep"
 433                       "\\)"))
 434         (quit-regex2 (concat
 435                       "[a-zA-Z][ \t]*"
 436                       "\\(" "!" "\\|" ">>"
 437                       "\\|" "\\+[0-9]+"
 438                       "\\)"
 439                       "*[ \t]*$"))
 440         (stay-regex (concat
 441                      "\\(" "^[ \t]*$"
 442                      "\\|" "[?/].*"
 443                      "\\|" "[ktgjmsz][ \t]*$"
 444                      "\\|" "^[ \t]*ab.*"
 445                      "\\|" "tr[ansfer \t]*"
 446                      "\\|" "sr[ \t]*"
 447                      "\\|" "mo.*"
 448                      "\\|" "^[ \t]*k?ma[^p]*"
 449                      "\\|" "^[ \t]*fi.*"
 450                      "\\|" "v?gl.*"
 451                      "\\|" "[vg][ \t]*$"
 452                      "\\|" "jo.*"
 453                      "\\|" "^[ \t]*ta.*"
 454                      "\\|" "^[ \t]*una.*"
 455                      "\\|" "^[ \t]*su.*"
 456                      "\\|['`][a-z][ \t]*"
 457                      "\\|" "![ \t]*[a-zA-Z].*"
 458                      "\\)"
 459                      "!*")))
 460
 461     (save-window-excursion ;; put cursor at the end of the Ex working buffer
 462       (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 463       (set-buffer vip-ex-work-buf)
 464       (goto-char (point-max)))
 465     (cond ((vip-looking-back quit-regex1) (exit-minibuffer))
 466           ((vip-looking-back stay-regex)  (insert " "))
 467           ((vip-looking-back quit-regex2) (exit-minibuffer))
 468           (t (insert " ")))))
 469
 470 ;; complete Ex command
 471 (defun ex-cmd-complete ()
 472   (interactive)
 473   (let (save-pos dist compl-list string-to-complete completion-result)
 474
 475     (save-excursion
 476       (setq dist (skip-chars-backward "[a-zA-Z!=>&~]")
 477             save-pos (point)))
 478
 479     (if (or (= dist 0)
 480             (vip-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
 481             (vip-looking-back
 482              "^[ \t]*[a-zA-Z!=>&~][ \t]*[/?]*+[ \t]+[a-zA-Z!=>&~]+"))
 483         ;; Preceding characters are not the ones allowed in an Ex command
 484         ;; or we have typed past command name.
 485         ;; Note: we didn't do parsing, so there may be surprises.
 486         (if (or (vip-looking-back "[a-zA-Z!=>&~][ \t]*[/?]*[ \t]*")
 487                 (vip-looking-back "\\([ \t]*['`][ \t]*[a-z]*\\)")
 488                 (looking-at "[^ \t\n\C-m]"))
 489             nil
 490           (with-output-to-temp-buffer "*Completions*"
 491             (display-completion-list
 492              (vip-alist-to-list ex-token-alist))))
 493       ;; Preceding chars may be part of a command name
 494       (setq string-to-complete (buffer-substring save-pos (point)))
 495       (setq completion-result
 496             (try-completion string-to-complete ex-token-alist))
 497
 498       (cond ((eq completion-result t)  ; exact match--do nothing
 499              (vip-tmp-insert-at-eob " (Sole completion)"))
 500             ((eq completion-result nil)
 501              (vip-tmp-insert-at-eob " (No match)"))
 502             (t  ;; partial completion
 503              (goto-char save-pos)
 504              (delete-region (point) (point-max))
 505              (insert completion-result)
 506              (let (case-fold-search)
 507                (setq compl-list
 508                      (vip-filter-alist (concat "^" completion-result)
 509                                        ex-token-alist)))
 510              (if (> (length compl-list) 1)
 511                  (with-output-to-temp-buffer "*Completions*"
 512                    (display-completion-list
 513                     (vip-alist-to-list (reverse compl-list)))))))
 514       )))
 515
 516
 517 ;; Read Ex commands
 518 (defun vip-ex (&optional string)
 519   (interactive)
 520   (or string
 521       (setq ex-g-flag nil
 522             ex-g-variant nil))
 523   (let* ((map (copy-keymap minibuffer-local-map))
 524          (address nil)
 525          (cont t)
 526          (dot (point))
 527          prev-token-type com-str)
 528
 529     (vip-add-keymap vip-ex-cmd-map map)
 530
 531     (setq com-str (or string (vip-read-string-with-history
 532                               ":"
 533                               nil
 534                               'vip-ex-history
 535                               (car vip-ex-history)
 536                               map)))
 537     (save-window-excursion
 538       ;; just a precaution
 539       (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 540       (set-buffer vip-ex-work-buf)
 541       (delete-region (point-min) (point-max))
 542       (insert com-str "\n")
 543       (goto-char (point-min)))
 544     (setq ex-token-type nil
 545           ex-addresses nil)
 546     (while cont
 547       (vip-get-ex-token)
 548       (cond ((memq ex-token-type '(command end-mark))
 549              (if address (setq ex-addresses (cons address ex-addresses)))
 550              (cond ((string= ex-token "global")
 551                     (ex-global nil)
 552                     (setq cont nil))
 553                    ((string= ex-token "vglobal")
 554                     (ex-global t)
 555                     (setq cont nil))
 556                    (t
 557                     (vip-execute-ex-command)
 558                     (save-window-excursion
 559                       (setq vip-ex-work-buf
 560                             (get-buffer-create vip-ex-work-buf-name))
 561                       (set-buffer vip-ex-work-buf)
 562                       (skip-chars-forward " \t")
 563                       (cond ((looking-at "|")
 564                              (forward-char 1))
 565                             ((looking-at "\n")
 566                              (setq cont nil))
 567                             (t (error "`%s': %s" ex-token vip-SpuriousText)))
 568                       ))
 569                    ))
 570             ((eq ex-token-type 'non-command)
 571              (error "`%s': %s" ex-token vip-BadExCommand))
 572             ((eq ex-token-type 'whole)
 573              (setq address nil)
 574              (setq ex-addresses
 575                    (if ex-addresses
 576                        (cons (point-max) ex-addresses)
 577                      (cons (point-max) (cons (point-min) ex-addresses)))))
 578             ((eq ex-token-type 'comma)
 579              (if (eq prev-token-type 'whole)
 580                  (setq address (point-min)))
 581              (setq ex-addresses
 582                    (cons (if (null address) (point) address) ex-addresses)))
 583             ((eq ex-token-type 'semi-colon)
 584              (if (eq prev-token-type 'whole)
 585                  (setq address (point-min)))
 586              (if address (setq dot address))
 587              (setq ex-addresses
 588                    (cons (if (null address) (point) address) ex-addresses)))
 589             (t (let ((ans (vip-get-ex-address-subr address dot)))
 590                  (if ans (setq address ans)))))
 591       (setq prev-token-type ex-token-type))))
 592
 593
 594 ;; Get a regular expression and set `ex-variant', if found
 595 (defun vip-get-ex-pat ()
 596   (save-window-excursion
 597     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 598     (set-buffer vip-ex-work-buf)
 599     (skip-chars-forward " \t")
 600     (if (looking-at "!")
 601         (progn
 602           (setq ex-g-variant (not ex-g-variant)
 603                 ex-g-flag (not ex-g-flag))
 604           (forward-char 1)
 605           (skip-chars-forward " \t")))
 606     (let ((c (following-char)))
 607       (if (string-match "[0-9A-Za-z]" (format "%c" c))
 608           (error
 609            "Global regexp must be inside matching non-alphanumeric chars"))
 610       (if (looking-at "[^\\\\\n]")
 611           (progn
 612             (forward-char 1)
 613             (set-mark (point))
 614             (let ((cont t))
 615               (while (and (not (eolp)) cont)
 616                 (if (not (re-search-forward (format "[^%c]*%c" c c) nil t))
 617                     (if (member ex-token '("global" "vglobal"))
 618                         (error
 619                          "Missing closing delimiter for global regexp")
 620                       (goto-char (point-max))))
 621                 (if (not (vip-looking-back
 622                           (format "[^\\\\]\\(\\\\\\\\\\)*\\\\%c" c)))
 623                     (setq cont nil))))
 624             (setq ex-token
 625                   (if (= (mark t) (point)) ""
 626                     (buffer-substring (1- (point)) (mark t))))
 627             (backward-char 1)
 628             ;; if the user doesn't specify the final pattern delimiter, we're
 629             ;; at newline now. In this case, insert the initial delimiter
 630             ;; specified in variable c
 631             (if (looking-at "\n")
 632                 (progn
 633                     (insert c)
 634                       (backward-char 1)))
 635             )
 636         (setq ex-token nil))
 637       c)))
 638
 639 ;; get an ex command
 640 (defun vip-get-ex-command ()
 641   (save-window-excursion
 642     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 643     (set-buffer vip-ex-work-buf)
 644     (if (looking-at "/") (forward-char 1))
 645     (skip-chars-forward " \t")
 646     (cond ((looking-at "[a-z]")
 647            (vip-get-ex-com-subr)
 648            (if (eq ex-token-type 'non-command)
 649                (error "`%s': %s" ex-token vip-BadExCommand)))
 650           ((looking-at "[!=><&~]")
 651            (setq ex-token (char-to-string (following-char)))
 652            (forward-char 1))
 653           (t (error vip-BadExCommand)))))
 654
 655 ;; Get an Ex option g or c
 656 (defun vip-get-ex-opt-gc (c)
 657   (save-window-excursion
 658     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 659     (set-buffer vip-ex-work-buf)
 660     (if (looking-at (format "%c" c)) (forward-char 1))
 661     (skip-chars-forward " \t")
 662     (cond ((looking-at "g")
 663            (setq ex-token "g")
 664            (forward-char 1)
 665            t)
 666           ((looking-at "c")
 667            (setq ex-token "c")
 668            (forward-char 1)
 669            t)
 670           (t nil))))
 671
 672 ;; Compute default addresses.  WHOLE-FLAG means use the whole buffer
 673 (defun vip-default-ex-addresses (&optional whole-flag)
 674   (cond ((null ex-addresses)
 675          (setq ex-addresses
 676                (if whole-flag
 677                    (cons (point-max) (cons (point-min) nil))
 678                  (cons (point) (cons (point) nil)))))
 679         ((null (cdr ex-addresses))
 680          (setq ex-addresses
 681                (cons (car ex-addresses) ex-addresses)))))
 682
 683 ;; Get an ex-address as a marker and set ex-flag if a flag is found
 684 (defun vip-get-ex-address ()
 685   (let ((address (point-marker))
 686         (cont t))
 687     (setq ex-token "")
 688     (setq ex-flag nil)
 689     (while cont
 690       (vip-get-ex-token)
 691       (cond ((eq ex-token-type 'command)
 692              (if (member ex-token '("print" "list" "#"))
 693                  (progn
 694                    (setq ex-flag t
 695                          cont nil))
 696                (error "Address expected in this Ex command")))
 697             ((eq ex-token-type 'end-mark)
 698              (setq cont nil))
 699             ((eq ex-token-type 'whole)
 700              (error "Trailing address expected"))
 701             ((eq ex-token-type 'comma)
 702              (error "`%s': %s" ex-token vip-SpuriousText))
 703             (t (let ((ans (vip-get-ex-address-subr address (point-marker))))
 704                  (if ans (setq address ans))))))
 705     address))
 706
 707 ;; Returns an address as a point
 708 (defun vip-get-ex-address-subr (old-address dot)
 709   (let ((address nil))
 710     (if (null old-address) (setq old-address dot))
 711     (cond ((eq ex-token-type 'dot)
 712            (setq address dot))
 713           ((eq ex-token-type 'add-number)
 714            (save-excursion
 715              (goto-char old-address)
 716              (forward-line (if (= old-address 0) (1- ex-token) ex-token))
 717              (setq address (point-marker))))
 718           ((eq ex-token-type 'sub-number)
 719            (save-excursion
 720              (goto-char old-address)
 721              (forward-line (- ex-token))
 722              (setq address (point-marker))))
 723           ((eq ex-token-type 'abs-number)
 724            (save-excursion
 725              (goto-char (point-min))
 726              (if (= ex-token 0) (setq address 0)
 727                (forward-line (1- ex-token))
 728                (setq address (point-marker)))))
 729           ((eq ex-token-type 'end)
 730            (setq address (point-max-marker)))
 731           ((eq ex-token-type 'plus) t)  ; do nothing
 732           ((eq ex-token-type 'minus) t) ; do nothing
 733           ((eq ex-token-type 'search-forward)
 734            (save-excursion
 735              (ex-search-address t)
 736              (setq address (point-marker))))
 737           ((eq ex-token-type 'search-backward)
 738            (save-excursion
 739              (ex-search-address nil)
 740              (setq address (point-marker))))
 741           ((eq ex-token-type 'goto-mark)
 742            (save-excursion
 743              (if (null ex-token)
 744                  (exchange-point-and-mark)
 745                (goto-char (vip-register-to-point
 746                            (1+ (- ex-token ?a)) 'enforce-buffer)))
 747              (setq address (point-marker)))))
 748     address))
 749
 750
 751 ;; Search pattern and set address
 752 (defun ex-search-address (forward)
 753   (if (string= ex-token "")
 754       (if (null vip-s-string)
 755           (error vip-NoPrevSearch)
 756         (setq ex-token vip-s-string))
 757     (setq vip-s-string ex-token))
 758   (if forward
 759       (progn
 760         (forward-line 1)
 761         (re-search-forward ex-token))
 762     (forward-line -1)
 763     (re-search-backward ex-token)))
 764
 765 ;; Get a buffer name and set `ex-count' and `ex-flag' if found
 766 (defun vip-get-ex-buffer ()
 767   (setq ex-buffer nil)
 768   (setq ex-count nil)
 769   (setq ex-flag nil)
 770   (save-window-excursion
 771     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 772     (set-buffer vip-ex-work-buf)
 773     (skip-chars-forward " \t")
 774     (if (looking-at "[a-zA-Z]")
 775         (progn
 776           (setq ex-buffer (following-char))
 777           (forward-char 1)
 778           (skip-chars-forward " \t")))
 779     (if (looking-at "[0-9]")
 780         (progn
 781           (set-mark (point))
 782           (re-search-forward "[0-9][0-9]*")
 783           (setq ex-count (string-to-int (buffer-substring (point) (mark t))))
 784           (skip-chars-forward " \t")))
 785     (if (looking-at "[pl#]")
 786         (progn
 787           (setq ex-flag t)
 788           (forward-char 1)))
 789     (if (not (looking-at "[\n|]"))
 790         (error "`%s': %s" ex-token vip-SpuriousText))))
 791
 792 (defun vip-get-ex-count ()
 793   (setq ex-variant nil
 794         ex-count nil
 795         ex-flag nil)
 796   (save-window-excursion
 797     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 798     (set-buffer vip-ex-work-buf)
 799     (skip-chars-forward " \t")
 800     (if (looking-at "!")
 801         (progn
 802           (setq ex-variant t)
 803           (forward-char 1)))
 804     (skip-chars-forward " \t")
 805     (if (looking-at "[0-9]")
 806         (progn
 807           (set-mark (point))
 808           (re-search-forward "[0-9][0-9]*")
 809           (setq ex-count (string-to-int (buffer-substring (point) (mark t))))
 810           (skip-chars-forward " \t")))
 811     (if (looking-at "[pl#]")
 812         (progn
 813           (setq ex-flag t)
 814           (forward-char 1)))
 815     (if (not (looking-at "[\n|]"))
 816         (error "`%s': %s"
 817                (buffer-substring (point-min) (1- (point-max))) vip-BadExCommand))))
 818
 819 ;; Expand \% and \# in ex command
 820 (defun ex-expand-filsyms (cmd buf)
 821   (let (cf pf ret)
 822     (save-excursion
 823       (set-buffer buf)
 824       (setq cf buffer-file-name)
 825       (setq pf (ex-next nil t))) ; this finds alternative file name
 826     (if (and (null cf) (string-match "[^\\]%\\|\\`%" cmd))
 827         (error "No current file to substitute for `%%'"))
 828     (if (and (null pf) (string-match "[^\\]#\\|\\`#" cmd))
 829         (error "No alternate file to substitute for `#'"))
 830     (save-excursion
 831       (set-buffer (get-buffer-create vip-ex-tmp-buf-name))
 832       (erase-buffer)
 833       (insert cmd)
 834       (goto-char (point-min))
 835       (while (re-search-forward "%\\|#" nil t)
 836         (let ((data (match-data))
 837               (char (buffer-substring (match-beginning 0) (match-end 0))))
 838           (if (vip-looking-back (concat "\\\\" char))
 839               (replace-match char)
 840             (store-match-data data)
 841             (if (string= char "%")
 842                 (replace-match cf)
 843               (replace-match pf)))))
 844       (end-of-line)
 845       (setq ret (buffer-substring (point-min) (point)))
 846       (message "%s" ret))
 847     ret))
 848
 849 ;; Get a file name and set ex-variant, `ex-append' and `ex-offset' if found
 850 (defun vip-get-ex-file ()
 851   (let (prompt)
 852     (setq ex-file nil
 853           ex-variant nil
 854           ex-append nil
 855           ex-offset nil
 856           ex-cmdfile nil)
 857     (save-excursion
 858       (save-window-excursion
 859         (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
 860         (set-buffer vip-ex-work-buf)
 861         (skip-chars-forward " \t")
 862         (if (looking-at "!")
 863             (if (and (not (vip-looking-back "[ \t]"))
 864                      ;; read doesn't have a corresponding :r! form, so ! is
 865                      ;; immediately interpreted as a shell command.
 866                      (not (string= ex-token "read")))
 867                 (progn
 868                   (setq ex-variant t)
 869                   (forward-char 1)
 870                   (skip-chars-forward " \t"))
 871               (setq ex-cmdfile t)
 872               (forward-char 1)
 873               (skip-chars-forward " \t")))
 874         (if (looking-at ">>")
 875             (progn
 876               (setq ex-append t
 877                     ex-variant t)
 878               (forward-char 2)
 879               (skip-chars-forward " \t")))
 880         (if (looking-at "+")
 881             (progn
 882               (forward-char 1)
 883               (set-mark (point))
 884               (re-search-forward "[ \t\n]")
 885               (backward-char 1)
 886               (setq ex-offset (buffer-substring (point) (mark t)))
 887               (forward-char 1)
 888               (skip-chars-forward " \t")))
 889         ;; this takes care of :r, :w, etc., when they get file names
 890         ;; from the history list
 891         (if (member ex-token '("read" "write" "edit" "visual" "next"))
 892             (progn
 893               (setq ex-file (buffer-substring (point)  (1- (point-max))))
 894               (setq ex-file
 895                     ;; For :e, match multiple non-white strings separated
 896                     ;; by white. For others, find the first non-white string
 897                     (if (string-match
 898                          (if (string= ex-token "edit")
 899                              "[^ \t\n]+\\([ \t]+[^ \t\n]+\\)*"
 900                            "[^ \t\n]+")
 901                          ex-file)
 902                         (progn
 903                           ;; if file name comes from history, don't leave
 904                           ;; minibuffer when the user types space
 905                           (setq vip-incomplete-ex-cmd nil)
 906                           ;; this must be the last clause in this progn
 907                           (substring ex-file (match-beginning 0) (match-end 0))
 908                           )
 909                       ""))
 910               ;; this leaves only the command name in the work area
 911               ;; file names are gone
 912               (delete-region (point) (1- (point-max)))
 913               ))
 914         (goto-char (point-max))
 915         (skip-chars-backward " \t\n")
 916         (setq prompt (buffer-substring (point-min) (point)))
 917         ))
 918
 919     (setq vip-last-ex-prompt prompt)
 920
 921     ;; If we just finished reading command, redisplay prompt
 922     (if vip-incomplete-ex-cmd
 923         (setq ex-file (vip-ex-read-file-name (format ":%s " prompt)))
 924       ;; file was typed in-line
 925       (setq ex-file (or ex-file "")))
 926     ))
 927
 928
 929 ;; Completes file name or exits minibuffer. If Ex command accepts multiple
 930 ;; file names, arranges to re-enter the minibuffer.
 931 (defun vip-complete-filename-or-exit ()
 932   (interactive)
 933   (setq vip-keep-reading-filename t)
 934   ;; don't exit if directory---ex-commands don't
 935   (cond ((ex-cmd-accepts-multiple-files-p ex-token) (exit-minibuffer))
 936         ;; apparently the argument to an Ex command is
 937         ;; supposed to be a shell command
 938         ((vip-looking-back "^[ \t]*!.*")
 939          (setq ex-cmdfile t)
 940          (insert " "))
 941         (t
 942          (setq ex-cmdfile nil)
 943          (minibuffer-complete-word))))
 944
 945 (defun vip-handle-! ()
 946   (interactive)
 947   (if (and (string=
 948             (buffer-string) (vip-abbreviate-file-name default-directory))
 949            (member ex-token '("read" "write")))
 950       (erase-buffer))
 951   (insert "!"))
 952
 953 (defun ex-cmd-accepts-multiple-files-p (token)
 954   (member token '("edit" "next" "Next")))
 955
 956 ;; If user doesn't enter anything, then "" is returned, i.e., the
 957 ;; prompt-directory is not returned.
 958 (defun vip-ex-read-file-name (prompt)
 959   (let* ((str "")
 960          (minibuffer-local-completion-map
 961           (copy-keymap minibuffer-local-completion-map))
 962          beg end cont val)
 963
 964     (vip-add-keymap ex-read-filename-map
 965                     (if vip-emacs-p
 966                         minibuffer-local-completion-map
 967                       read-file-name-map))
 968
 969     (setq cont (setq vip-keep-reading-filename t))
 970     (while cont
 971       (setq vip-keep-reading-filename nil
 972             val (read-file-name (concat prompt str) nil default-directory))
 973       (if (string-match " " val)
 974           (setq val (concat "\\\"" val "\\\"")))
 975       (setq str  (concat str (if (equal val "") "" " ")
 976                          val (if (equal val "") "" " ")))
 977
 978       ;; Only edit, next, and Next commands accept multiple files.
 979       ;; vip-keep-reading-filename is set in the anonymous function that is
 980       ;; bound to " " in ex-read-filename-map.
 981       (setq cont (and vip-keep-reading-filename
 982                       (ex-cmd-accepts-multiple-files-p ex-token)))
 983       )
 984
 985     (setq beg (string-match "[^ \t]" str)   ; delete leading blanks
 986           end (string-match "[ \t]*$" str)) ; delete trailing blanks
 987     (if (member ex-token '("read" "write"))
 988           (if (string-match "[\t ]*!" str)
 989               ;; this is actually a shell command
 990               (progn
 991                 (setq ex-cmdfile t)
 992                 (setq beg (1+ beg))
 993                 (setq vip-last-ex-prompt (concat vip-last-ex-prompt " !")))))
 994     (substring str (or beg 0) end)))
 995
 996 ;; Execute ex command using the value of addresses
 997 (defun vip-execute-ex-command ()
 998   (vip-deactivate-mark)
 999   (cond ((string= ex-token "args") (ex-args))
1000         ((string= ex-token "copy") (ex-copy nil))
1001         ((string= ex-token "cd") (ex-cd))
1002         ((string= ex-token "chdir") (ex-cd))
1003         ((string= ex-token "delete") (ex-delete))
1004         ((string= ex-token "edit") (ex-edit))
1005         ((string= ex-token "file") (vip-info-on-file))
1006         ((string= ex-token "goto") (ex-goto))
1007         ((string= ex-token "help") (ex-help))
1008         ((string= ex-token "join") (ex-line "join"))
1009         ((string= ex-token "kmark") (ex-mark))
1010         ((string= ex-token "mark") (ex-mark))
1011         ((string= ex-token "map") (ex-map))
1012         ((string= ex-token "move") (ex-copy t))
1013         ((string= ex-token "next") (ex-next ex-cycle-other-window))
1014         ((string= ex-token "Next") (ex-next (not ex-cycle-other-window)))
1015         ((string= ex-token "RelatedFile") (ex-next-related-buffer 1))
1016         ((string= ex-token "put") (ex-put))
1017         ((string= ex-token "pwd") (ex-pwd))
1018         ((string= ex-token "preserve") (ex-preserve))
1019         ((string= ex-token "PreviousRelatedFile") (ex-next-related-buffer -1))
1020         ((string= ex-token "quit") (ex-quit))
1021         ((string= ex-token "read") (ex-read))
1022         ((string= ex-token "recover") (ex-recover))
1023         ((string= ex-token "rewind") (ex-rewind))
1024         ((string= ex-token "submitReport") (vip-submit-report))
1025         ((string= ex-token "set") (ex-set))
1026         ((string= ex-token "shell") (ex-shell))
1027         ((string= ex-token "source") (ex-source))
1028         ((string= ex-token "sr") (ex-substitute t t))
1029         ((string= ex-token "substitute") (ex-substitute))
1030         ((string= ex-token "suspend") (suspend-emacs))
1031         ((string= ex-token "stop") (suspend-emacs))
1032         ((string= ex-token "transfer") (ex-copy nil))
1033         ((string= ex-token "buffer") (if ex-cycle-other-window
1034                                          (vip-switch-to-buffer-other-window)
1035                                          (vip-switch-to-buffer)))
1036         ((string= ex-token "Buffer") (if ex-cycle-other-window
1037                                          (vip-switch-to-buffer)
1038                                          (vip-switch-to-buffer-other-window)))
1039         ((string= ex-token "tag") (ex-tag))
1040         ((string= ex-token "undo") (vip-undo))
1041         ((string= ex-token "unmap") (ex-unmap))
1042         ((string= ex-token "version") (vip-version))
1043         ((string= ex-token "visual") (ex-edit))
1044         ((string= ex-token "write") (ex-write nil))
1045         ((string= ex-token "Write") (save-some-buffers))
1046         ((string= ex-token "wq") (ex-write t))
1047         ((string= ex-token "WWrite") (save-some-buffers t)) ; don't ask
1048         ((string= ex-token "xit") (ex-write t))
1049         ((string= ex-token "yank") (ex-yank))
1050         ((string= ex-token "!") (ex-command))
1051         ((string= ex-token "=") (ex-line-no))
1052         ((string= ex-token ">") (ex-line "right"))
1053         ((string= ex-token "<") (ex-line "left"))
1054         ((string= ex-token "&") (ex-substitute t))
1055         ((string= ex-token "~") (ex-substitute t t))
1056         ((or (string= ex-token "append")
1057              (string= ex-token "change")
1058              (string= ex-token "insert")
1059              (string= ex-token "open"))
1060          (error "`%s': Obsolete command, not supported by Viper" ex-token))
1061         ((or (string= ex-token "abbreviate")
1062              (string= ex-token "unabbreviate"))
1063          (error
1064           "`%s': Vi abbrevs are obsolete. Use the more powerful Emacs abbrevs"
1065           ex-token))
1066         ((or (string= ex-token "list")
1067              (string= ex-token "print")
1068              (string= ex-token "z")
1069              (string= ex-token "#"))
1070          (error "`%s': Command not implemented in Viper" ex-token))
1071         (t (error "`%s': %s" ex-token vip-BadExCommand))))
1072
1073 (defun vip-undisplayed-files ()
1074   (mapcar
1075    (function
1076     (lambda (b)
1077       (if (null (get-buffer-window b))
1078           (let ((f (buffer-file-name b)))
1079             (if f f
1080               (if ex-cycle-through-non-files
1081                   (let ((s (buffer-name b)))
1082                     (if (string= " " (substring s 0 1))
1083                         nil
1084                       s))
1085                 nil)))
1086         nil)))
1087    (buffer-list)))
1088
1089
1090 (defun ex-args ()
1091   (let ((l (vip-undisplayed-files))
1092         (args "")
1093         (file-count 1))
1094     (while (not (null l))
1095       (if (car l)
1096           (setq args (format "%s %d) %s\n" args file-count (car l))
1097                 file-count (1+ file-count)))
1098       (setq l (cdr l)))
1099     (if (string= args "")
1100         (message "All files are already displayed")
1101       (save-excursion
1102         (save-window-excursion
1103           (with-output-to-temp-buffer " *vip-info*"
1104             (princ "\n\nThese files are not displayed in any window.\n")
1105             (princ "\n=============\n")
1106             (princ args)
1107             (princ "\n=============\n")
1108             (princ "\nThe numbers can be given as counts to :next. ")
1109             (princ "\n\nPress any key to continue...\n\n"))
1110           (vip-read-event))))))
1111
1112 ;; Ex cd command. Default directory of this buffer changes
1113 (defun ex-cd ()
1114   (vip-get-ex-file)
1115   (if (string= ex-file "")
1116       (setq ex-file "~"))
1117   (setq default-directory (file-name-as-directory (expand-file-name ex-file))))
1118
1119 ;; Ex copy and move command.  DEL-FLAG means delete
1120 (defun ex-copy (del-flag)
1121   (vip-default-ex-addresses)
1122   (let ((address (vip-get-ex-address))
1123         (end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1124     (goto-char end)
1125     (save-excursion
1126       (push-mark beg t)
1127       (vip-enlarge-region (mark t) (point))
1128       (if del-flag
1129           (kill-region (point) (mark t))
1130         (copy-region-as-kill (point) (mark t)))
1131       (if ex-flag
1132           (progn
1133             (with-output-to-temp-buffer "*copy text*"
1134               (princ
1135                (if (or del-flag ex-g-flag ex-g-variant)
1136                    (current-kill 0)
1137                  (buffer-substring (point) (mark t)))))
1138             (condition-case nil
1139                 (progn
1140                   (read-string "[Hit return to continue] ")
1141                   (save-excursion (kill-buffer "*copy text*")))
1142               (quit (save-excursion (kill-buffer "*copy text*"))
1143                     (signal 'quit nil))))))
1144     (if (= address 0)
1145         (goto-char (point-min))
1146       (goto-char address)
1147       (forward-line 1))
1148       (insert (current-kill 0))))
1149
1150 ;; Ex delete command
1151 (defun ex-delete ()
1152   (vip-default-ex-addresses)
1153   (vip-get-ex-buffer)
1154   (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
1155     (if (> beg end) (error vip-FirstAddrExceedsSecond))
1156     (save-excursion
1157       (vip-enlarge-region beg end)
1158       (exchange-point-and-mark)
1159       (if ex-count
1160           (progn
1161             (set-mark (point))
1162             (forward-line (1- ex-count)))
1163         (set-mark end))
1164       (vip-enlarge-region (point) (mark t))
1165       (if ex-flag
1166           ;; show text to be deleted and ask for confirmation
1167           (progn
1168             (with-output-to-temp-buffer " *delete text*"
1169               (princ (buffer-substring (point) (mark t))))
1170             (condition-case nil
1171                 (read-string "[Hit return to continue] ")
1172               (quit
1173                (save-excursion (kill-buffer " *delete text*"))
1174                (error "")))
1175             (save-excursion (kill-buffer " *delete text*")))
1176         (if ex-buffer
1177             (cond ((vip-valid-register ex-buffer '(Letter))
1178                    (vip-append-to-register
1179                     (downcase ex-buffer) (point) (mark t)))
1180                   ((vip-valid-register ex-buffer)
1181                    (copy-to-register ex-buffer (point) (mark t) nil))
1182                   (t (error vip-InvalidRegister ex-buffer))))
1183         (kill-region (point) (mark t))))))
1184
1185
1186
1187 ;; Ex edit command
1188 ;; In Viper, `e' and `e!' behave identically. In both cases, the user is
1189 ;; asked if current buffer should really be discarded.
1190 ;; This command can take multiple file names. It replaces the current buffer
1191 ;; with the first file in its argument list
1192 (defun ex-edit (&optional file)
1193   (if (not file)
1194       (vip-get-ex-file))
1195   (cond ((and (string= ex-file "") buffer-file-name)
1196          (setq ex-file  (vip-abbreviate-file-name (buffer-file-name))))
1197         ((string= ex-file "")
1198          (error vip-NoFileSpecified)))
1199
1200   (let (msg do-edit)
1201     (if buffer-file-name
1202         (cond ((buffer-modified-p)
1203                (setq msg
1204                      (format "Buffer %s is modified. Discard changes? "
1205                              (buffer-name))
1206                      do-edit t))
1207               ((not (verify-visited-file-modtime (current-buffer)))
1208                (setq msg
1209                      (format "File %s changed on disk.  Reread from disk? "
1210                              buffer-file-name)
1211                      do-edit t))
1212               (t (setq do-edit nil))))
1213
1214     (if do-edit
1215         (if (yes-or-no-p msg)
1216             (progn
1217               (set-buffer-modified-p nil)
1218               (kill-buffer (current-buffer)))
1219           (message "Buffer %s was left intact" (buffer-name))))
1220     ) ; let
1221
1222   (if (null (setq file (get-file-buffer ex-file)))
1223       (progn
1224         (ex-find-file ex-file)
1225         (or (eq major-mode 'dired-mode)
1226             (vip-change-state-to-vi))
1227         (goto-char (point-min)))
1228     (switch-to-buffer file))
1229   (if ex-offset
1230       (progn
1231         (save-window-excursion
1232           (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
1233           (set-buffer vip-ex-work-buf)
1234           (delete-region (point-min) (point-max))
1235           (insert ex-offset "\n")
1236           (goto-char (point-min)))
1237         (goto-char (vip-get-ex-address))
1238         (beginning-of-line)))
1239   (ex-fixup-history vip-last-ex-prompt ex-file))
1240
1241 ;; Find-file FILESPEC if it appears to specify a single file.
1242 ;; Otherwise, assume that FILES{EC is a wildcard.
1243 ;; In this case, split it into substrings separated by newlines.
1244 ;; Each line is assumed to be a file name. find-file's each file thus obtained.
1245 (defun ex-find-file (filespec)
1246   (let ((nonstandard-filename-chars "[^-a-zA-Z0-9_./,~$\\]"))
1247     (cond ((file-exists-p filespec) (find-file filespec))
1248           ((string-match nonstandard-filename-chars  filespec)
1249            (funcall ex-nontrivial-find-file-function filespec))
1250           (t (find-file filespec)))
1251     ))
1252
1253
1254 ;; Ex global command
1255 ;; This is executed in response to:
1256 ;;              :global "pattern" ex-command
1257 ;;              :vglobal "pattern" ex-command
1258 ;; :global executes ex-command on all lines matching <pattern>
1259 ;; :vglobal executes ex-command on all lines that don't match <pattern>
1260 ;;
1261 ;; With VARIANT nil, this functions executes :global
1262 ;; With VARIANT t, executes :vglobal
1263 (defun ex-global (variant)
1264   (let ((gcommand ex-token))
1265     (if (or ex-g-flag ex-g-variant)
1266         (error "`%s' within `global' is not allowed" gcommand)
1267       (if variant
1268           (setq ex-g-flag nil
1269                 ex-g-variant t)
1270         (setq ex-g-flag t
1271               ex-g-variant nil)))
1272     (vip-get-ex-pat)
1273     (if (null ex-token)
1274         (error "`%s': Missing regular expression" gcommand)))
1275
1276   (if (string= ex-token "")
1277       (if (null vip-s-string)
1278           (error vip-NoPrevSearch)
1279         (setq ex-g-pat vip-s-string))
1280     (setq ex-g-pat ex-token
1281           vip-s-string ex-token))
1282   (if (null ex-addresses)
1283       (setq ex-addresses (list (point-max) (point-min)))
1284     (vip-default-ex-addresses))
1285   (let ((marks nil)
1286         (mark-count 0)
1287         (end (car ex-addresses))
1288         (beg (car (cdr ex-addresses)))
1289         com-str)
1290     (if (> beg end) (error vip-FirstAddrExceedsSecond))
1291     (save-excursion
1292       (vip-enlarge-region beg end)
1293       (exchange-point-and-mark)
1294       (let ((cont t) (limit (point-marker)))
1295         (exchange-point-and-mark)
1296         ;; skip the last line if empty
1297         (beginning-of-line)
1298         (if (eobp) (vip-backward-char-carefully))
1299         (while (and cont (not (bobp)) (>= (point) limit))
1300           (beginning-of-line)
1301           (set-mark (point))
1302           (end-of-line)
1303           (let ((found (re-search-backward ex-g-pat (mark t) t)))
1304             (if (or (and ex-g-flag found)
1305                     (and ex-g-variant (not found)))
1306                 (progn
1307                   (end-of-line)
1308                   (setq mark-count (1+ mark-count))
1309                   (setq marks (cons (point-marker) marks)))))
1310           (beginning-of-line)
1311           (if (bobp) (setq cont nil)
1312             (forward-line -1)
1313             (end-of-line)))))
1314     (save-window-excursion
1315       (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
1316       (set-buffer vip-ex-work-buf)
1317       (setq com-str (buffer-substring (1+ (point)) (1- (point-max)))))
1318     (while marks
1319       (goto-char (car marks))
1320       (vip-ex com-str)
1321       (setq mark-count (1- mark-count))
1322       (setq marks (cdr marks)))))
1323
1324 ;; Ex goto command
1325 (defun ex-goto ()
1326   (if (null ex-addresses)
1327       (setq ex-addresses (cons (point) nil)))
1328   (push-mark (point) t)
1329   (goto-char (car ex-addresses))
1330   (beginning-of-line))
1331
1332 ;; Ex line commands.  COM is join, shift-right or shift-left
1333 (defun ex-line (com)
1334   (vip-default-ex-addresses)
1335   (vip-get-ex-count)
1336   (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))) point)
1337     (if (> beg end) (error vip-FirstAddrExceedsSecond))
1338     (save-excursion
1339       (vip-enlarge-region beg end)
1340       (exchange-point-and-mark)
1341       (if ex-count
1342           (progn
1343             (set-mark (point))
1344             (forward-line ex-count)))
1345       (if ex-flag
1346           ;; show text to be joined and ask for confirmation
1347           (progn
1348             (with-output-to-temp-buffer " *text*"
1349               (princ (buffer-substring (point) (mark t))))
1350             (condition-case nil
1351                 (progn
1352                   (read-string "[Hit return to continue] ")
1353                   (ex-line-subr com (point) (mark t)))
1354               (quit (ding)))
1355             (save-excursion (kill-buffer " *text*")))
1356         (ex-line-subr com (point) (mark t)))
1357       (setq point (point)))
1358     (goto-char (1- point))
1359     (beginning-of-line)))
1360
1361 (defun ex-line-subr (com beg end)
1362   (cond ((string= com "join")
1363          (goto-char (min beg end))
1364          (while (and (not (eobp)) (< (point) (max beg end)))
1365            (end-of-line)
1366            (if (and (<= (point) (max beg end)) (not (eobp)))
1367                (progn
1368                  (forward-line 1)
1369                  (delete-region (point) (1- (point)))
1370                  (if (not ex-variant) (fixup-whitespace))))))
1371         ((or (string= com "right") (string= com "left"))
1372          (indent-rigidly
1373           (min beg end) (max beg end)
1374           (if (string= com "right") vip-shift-width (- vip-shift-width)))
1375          (goto-char (max beg end))
1376          (end-of-line)
1377          (vip-forward-char-carefully))))
1378
1379
1380 ;; Ex mark command
1381 (defun ex-mark ()
1382   (let (char)
1383     (if (null ex-addresses)
1384         (setq ex-addresses
1385               (cons (point) nil)))
1386     (save-window-excursion
1387       (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
1388       (set-buffer vip-ex-work-buf)
1389       (skip-chars-forward " \t")
1390       (if (looking-at "[a-z]")
1391           (progn
1392             (setq char (following-char))
1393             (forward-char 1)
1394             (skip-chars-forward " \t")
1395             (if (not (looking-at "[\n|]"))
1396                 (error "`%s': %s" ex-token vip-SpuriousText)))
1397         (error "`%s' requires a following letter" ex-token)))
1398     (save-excursion
1399       (goto-char (car ex-addresses))
1400       (point-to-register (1+ (- char ?a))))))
1401
1402
1403
1404 ;; Alternate file is the file next to the first one in the buffer ring
1405 (defun ex-next (cycle-other-window &optional find-alt-file)
1406   (catch 'ex-edit
1407     (let (count l)
1408       (if (not find-alt-file)
1409           (progn
1410             (vip-get-ex-file)
1411             (if (or (char-or-string-p ex-offset)
1412                     (and (not (string= "" ex-file))
1413                          (not (string-match "^[0-9]+$" ex-file))))
1414                 (progn
1415                   (ex-edit t)
1416                   (throw 'ex-edit nil))
1417               (setq count (string-to-int ex-file))
1418               (if (= count 0) (setq count 1))
1419               (if (< count 0) (error "Usage: `next <count>' (count >= 0)"))))
1420         (setq count 1))
1421       (setq l (vip-undisplayed-files))
1422       (while (> count 0)
1423         (while (and (not (null l)) (null (car l)))
1424           (setq l (cdr l)))
1425         (setq count (1- count))
1426         (if (> count 0)
1427             (setq l (cdr l))))
1428       (if find-alt-file (car l)
1429         (progn
1430           (if (and (car l) (get-file-buffer (car l)))
1431               (let* ((w (if cycle-other-window
1432                             (get-lru-window) (selected-window)))
1433                      (b (window-buffer w)))
1434                 (set-window-buffer w (get-file-buffer (car l)))
1435                 (bury-buffer b)
1436                 ;; this puts "next <count>" in the ex-command history
1437                 (ex-fixup-history vip-last-ex-prompt ex-file))
1438             (error "Not that many undisplayed files")))))))
1439
1440
1441 (defun ex-next-related-buffer (direction &optional no-recursion)
1442
1443   (vip-ring-rotate1 vip-related-files-and-buffers-ring direction)
1444
1445   (let ((file-or-buffer-name
1446          (vip-current-ring-item vip-related-files-and-buffers-ring))
1447         (old-ring vip-related-files-and-buffers-ring)
1448         (old-win (selected-window))
1449         skip-rest buf wind)
1450
1451     (or (and (ring-p vip-related-files-and-buffers-ring)
1452              (> (ring-length vip-related-files-and-buffers-ring) 0))
1453         (error "This buffer has no related files or buffers"))
1454
1455     (or (stringp file-or-buffer-name)
1456         (error
1457          "File and buffer names must be strings, %S" file-or-buffer-name))
1458
1459     (setq buf (cond ((get-buffer file-or-buffer-name))
1460                     ((file-exists-p file-or-buffer-name)
1461                      (find-file-noselect file-or-buffer-name))
1462                     ))
1463
1464     (if (not (vip-buffer-live-p buf))
1465         (error "Didn't find buffer %S or file %S"
1466                file-or-buffer-name
1467                (vip-abbreviate-file-name
1468                 (expand-file-name file-or-buffer-name))))
1469
1470     (if (equal buf (current-buffer))
1471         (or no-recursion
1472             ;; try again
1473             (progn
1474               (setq skip-rest t)
1475               (ex-next-related-buffer direction 'norecursion))))
1476
1477     (if skip-rest
1478         ()
1479       ;; setup buffer
1480       (if (setq wind (vip-get-visible-buffer-window buf))
1481           ()
1482         (setq wind (get-lru-window (if vip-xemacs-p nil 'visible)))
1483         (set-window-buffer wind buf))
1484
1485       (if (vip-window-display-p)
1486           (progn
1487             (raise-frame (window-frame wind))
1488             (if (equal (window-frame wind) (window-frame old-win))
1489                 (save-window-excursion (select-window wind) (sit-for 1))
1490               (select-window wind)))
1491         (save-window-excursion (select-window wind) (sit-for 1)))
1492
1493       (save-excursion
1494         (set-buffer buf)
1495         (setq vip-related-files-and-buffers-ring old-ring))
1496
1497       (setq vip-local-search-start-marker (point-marker))
1498       )))
1499
1500
1501 ;; Force auto save
1502 (defun ex-preserve ()
1503   (message "Autosaving all buffers that need to be saved...")
1504   (do-auto-save t))
1505
1506 ;; Ex put
1507 (defun ex-put ()
1508   (let ((point (if (null ex-addresses) (point) (car ex-addresses))))
1509     (vip-get-ex-buffer)
1510     (setq vip-use-register ex-buffer)
1511     (goto-char point)
1512     (if (bobp) (vip-Put-back 1) (vip-put-back 1))))
1513
1514 ;; Ex print working directory
1515 (defun ex-pwd ()
1516   (message default-directory))
1517
1518 ;; Ex quit command
1519 (defun ex-quit ()
1520   ;; skip "!", if it is q!. In Viper q!, w!, etc., behave as q, w, etc.
1521   (save-excursion
1522     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
1523     (set-buffer vip-ex-work-buf)
1524     (if (looking-at "!") (forward-char 1)))
1525   (if (< viper-expert-level 3)
1526       (save-buffers-kill-emacs)
1527     (kill-buffer (current-buffer))))
1528
1529
1530 ;; Ex read command
1531 (defun ex-read ()
1532   (vip-get-ex-file)
1533   (let ((point (if (null ex-addresses) (point) (car ex-addresses)))
1534         command)
1535     (goto-char point)
1536     (vip-add-newline-at-eob-if-necessary)
1537     (if (not (or (bobp) (eobp))) (forward-line 1))
1538     (if (and (not ex-variant) (string= ex-file ""))
1539         (progn
1540           (if (null buffer-file-name)
1541               (error vip-NoFileSpecified))
1542           (setq ex-file buffer-file-name)))
1543     (if ex-cmdfile
1544         (progn
1545           (setq command (ex-expand-filsyms ex-file (current-buffer)))
1546           (shell-command command t))
1547       (insert-file-contents ex-file)))
1548   (ex-fixup-history vip-last-ex-prompt ex-file))
1549
1550 ;; this function fixes ex-history for some commands like ex-read, ex-edit
1551 (defun ex-fixup-history (&rest args)
1552   (setq vip-ex-history
1553         (cons (mapconcat 'identity args " ") (cdr vip-ex-history))))
1554
1555
1556 ;; Ex recover from emacs \#file\#
1557 (defun ex-recover ()
1558   (vip-get-ex-file)
1559   (if (or ex-append ex-offset)
1560       (error "`recover': %s" vip-SpuriousText))
1561   (if (string= ex-file "")
1562       (progn
1563         (if (null buffer-file-name)
1564             (error "This buffer isn't visiting any file"))
1565         (setq ex-file buffer-file-name))
1566     (setq ex-file (expand-file-name ex-file)))
1567   (if (and (not (string= ex-file (buffer-file-name)))
1568            (buffer-modified-p)
1569            (not ex-variant))
1570       (error "No write since last change \(:rec! overrides\)"))
1571   (recover-file ex-file))
1572
1573 ;; Tell that `rewind' is obsolete and to use `:next count' instead
1574 (defun ex-rewind ()
1575   (message
1576    "Use `:n <count>' instead. Counts are obtained from the `:args' command"))
1577
1578
1579 ;; read variable name for ex-set
1580 (defun ex-set-read-variable ()
1581   (let ((minibuffer-local-completion-map
1582          (copy-keymap minibuffer-local-completion-map))
1583         (cursor-in-echo-area t)
1584         str batch)
1585     (define-key
1586       minibuffer-local-completion-map " " 'minibuffer-complete-and-exit)
1587     (define-key minibuffer-local-completion-map "=" 'exit-minibuffer)
1588     (if (vip-set-unread-command-events
1589          (ex-get-inline-cmd-args "[ \t]*[a-zA-Z]*[ \t]*" nil "\C-m"))
1590         (progn
1591           (setq batch t)
1592           (vip-set-unread-command-events ?\C-m)))
1593     (message ":set  <Variable> [= <Value>]")
1594     (or batch (sit-for 2))
1595
1596     (while (string-match "^[ \\t\\n]*$"
1597                          (setq str
1598                                (completing-read ":set " ex-variable-alist)))
1599       (message ":set <Variable> [= <Value>]")
1600       ;; if there are unread events, don't wait
1601       (or (vip-set-unread-command-events "") (sit-for 2))
1602       ) ; while
1603     str))
1604
1605
1606 (defun ex-set ()
1607   (let ((var (ex-set-read-variable))
1608         (val 0)
1609         (set-cmd "setq")
1610         (ask-if-save t)
1611         (auto-cmd-label "; don't touch or else...")
1612         (delete-turn-on-auto-fill-pattern
1613          "([ \t]*add-hook[ \t]+'vip-insert-state-hooks[ \t]+'turn-on-auto-fill.*)")
1614         actual-lisp-cmd lisp-cmd-del-pattern
1615         val2 orig-var)
1616     (setq orig-var var)
1617     (cond ((string= var "all")
1618            (setq ask-if-save nil
1619                  set-cmd nil))
1620           ((member var '("ai" "autoindent"))
1621            (setq var "vip-auto-indent"
1622                  set-cmd "setq"
1623                  ask-if-save nil
1624                  val "t"))
1625           ((member var '("ai-g" "autoindent-global"))
1626            (kill-local-variable 'vip-auto-indent)
1627            (setq var "vip-auto-indent"
1628                  set-cmd "setq-default"
1629                  val "t"))
1630           ((member var '("noai" "noautoindent"))
1631            (setq var "vip-auto-indent"
1632                  ask-if-save nil
1633                  val "nil"))
1634           ((member var '("noai-g" "noautoindent-global"))
1635            (kill-local-variable 'vip-auto-indent)
1636            (setq var "vip-auto-indent"
1637                  set-cmd "setq-default"
1638                  val "nil"))
1639           ((member var '("ic" "ignorecase"))
1640            (setq var "vip-case-fold-search"
1641                  val "t"))
1642           ((member var '("noic" "noignorecase"))
1643            (setq var "vip-case-fold-search"
1644                  val "nil"))
1645           ((member var '("ma" "magic"))
1646            (setq var "vip-re-search"
1647                  val "t"))
1648           ((member var '("noma" "nomagic"))
1649            (setq var "vip-re-search"
1650                  val "nil"))
1651           ((member var '("ro" "readonly"))
1652            (setq var "buffer-read-only"
1653                  val "t"))
1654           ((member var '("noro" "noreadonly"))
1655            (setq var "buffer-read-only"
1656                  val "nil"))
1657           ((member var '("sm" "showmatch"))
1658            (setq var "blink-matching-paren"
1659                  val "t"))
1660           ((member var '("nosm" "noshowmatch"))
1661            (setq var "blink-matching-paren"
1662                  val "nil"))
1663           ((member var '("ws" "wrapscan"))
1664            (setq var "vip-search-wrap-around-t"
1665                  val "t"))
1666           ((member var '("nows" "nowrapscan"))
1667            (setq var "vip-search-wrap-around-t"
1668                  val "nil")))
1669     (if (and set-cmd (eq val 0)) ; value must be set by the user
1670         (let ((cursor-in-echo-area t))
1671           (message ":set %s = <Value>" var)
1672           ;; if there are unread events, don't wait
1673           (or (vip-set-unread-command-events "") (sit-for 2))
1674           (setq val (read-string (format ":set %s = " var)))
1675           (ex-fixup-history "set" orig-var val)
1676
1677           ;; check numerical values
1678           (if (member var
1679                       '("sw" "shiftwidth"
1680                         "ts" "tabstop"
1681                         "ts-g" "tabstop-global"
1682                         "wm" "wrapmargin"))
1683               (condition-case nil
1684                   (or (numberp (setq val2 (car (read-from-string val))))
1685                       (error "%s: Invalid value, numberp, %S" var val))
1686                 (error
1687                  (error "%s: Invalid value, numberp, %S" var val))))
1688
1689           (cond
1690            ((member var '("sw" "shiftwidth"))
1691             (setq var "vip-shift-width"))
1692            ((member var '("ts" "tabstop"))
1693             ;; make it take effect in curr buff and new bufs
1694             (setq var "tab-width"
1695                   set-cmd "setq"
1696                   ask-if-save nil))
1697            ((member var '("ts-g" "tabstop-global"))
1698             (kill-local-variable 'tab-width)
1699             (setq var "tab-width"
1700                   set-cmd "setq-default"))
1701            ((member var '("wm" "wrapmargin"))
1702             ;; make it take effect in curr buff and new bufs
1703             (kill-local-variable 'fill-column)
1704             (setq var "fill-column"
1705                   val (format "(- (window-width) %s)" val)
1706                   set-cmd "setq-default"))
1707            ((member var '("sh" "shell"))
1708             (setq var "explicit-shell-file-name"
1709                   val (format "\"%s\"" val)))))
1710       (ex-fixup-history "set" orig-var))
1711
1712     (if set-cmd
1713         (setq actual-lisp-cmd
1714               (format "\n(%s %s %s) %s" set-cmd var val auto-cmd-label)
1715               lisp-cmd-del-pattern
1716               (format "^\n?[ \t]*([ \t]*%s[ \t]+%s[ \t].*)[ \t]*%s"
1717                       set-cmd var auto-cmd-label)))
1718
1719     (if (and ask-if-save
1720              (y-or-n-p (format "Do you want to save this setting in %s "
1721                                vip-custom-file-name)))
1722         (progn
1723           (vip-save-string-in-file
1724            actual-lisp-cmd vip-custom-file-name
1725            ;; del pattern
1726            lisp-cmd-del-pattern)
1727           (if (string= var "fill-column")
1728               (if (> val2 0)
1729                   (vip-save-string-in-file
1730                    (concat
1731                     "(add-hook 'vip-insert-state-hooks 'turn-on-auto-fill) "
1732                     auto-cmd-label)
1733                    vip-custom-file-name
1734                    delete-turn-on-auto-fill-pattern)
1735                 (vip-save-string-in-file
1736                  nil vip-custom-file-name delete-turn-on-auto-fill-pattern)
1737                 (vip-save-string-in-file
1738                  nil vip-custom-file-name
1739                  ;; del pattern
1740                  lisp-cmd-del-pattern)
1741                 ))
1742           ))
1743
1744     (if set-cmd
1745         (message "%s %s %s"
1746                  set-cmd var
1747                  (if (string-match "^[ \t]*$" val)
1748                      (format "%S" val)
1749                    val)))
1750     (if actual-lisp-cmd
1751         (eval (car (read-from-string actual-lisp-cmd))))
1752     (if (string= var "fill-column")
1753         (if (> val2 0)
1754             (auto-fill-mode 1)
1755           (auto-fill-mode -1)))
1756     (if (string= var "all") (ex-show-vars))
1757     ))
1758
1759 ;; In inline args, skip regex-forw and (optionally) chars-back.
1760 ;; Optional 3d arg is a string that should replace ' ' to prevent its
1761 ;; special meaning
1762 (defun ex-get-inline-cmd-args (regex-forw &optional chars-back replace-str)
1763   (save-excursion
1764     (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
1765     (set-buffer vip-ex-work-buf)
1766     (goto-char (point-min))
1767     (re-search-forward regex-forw nil t)
1768     (let ((beg (point))
1769           end)
1770       (goto-char (point-max))
1771       (if chars-back
1772           (skip-chars-backward chars-back)
1773         (skip-chars-backward " \t\n\C-m"))
1774       (setq end (point))
1775       ;; replace SPC with `=' to suppress the special meaning SPC has
1776       ;; in Ex commands
1777       (goto-char beg)
1778       (if replace-str
1779           (while (re-search-forward " +" nil t)
1780             (replace-match replace-str nil t)
1781             (vip-forward-char-carefully)))
1782       (goto-char end)
1783       (buffer-substring beg end))))
1784
1785
1786 ;; Ex shell command
1787 (defun ex-shell ()
1788   (shell))
1789
1790 ;; Viper help. Invokes Info
1791 (defun ex-help ()
1792   (condition-case nil
1793       (progn
1794         (pop-to-buffer (get-buffer-create "*info*"))
1795         (info (if vip-xemacs-p "viper.info" "viper"))
1796         (message "Type `i' to search for a specific topic"))
1797     (error (beep 1)
1798            (with-output-to-temp-buffer " *vip-info*"
1799              (princ (format "
1800 The Info file for Viper does not seem to be installed.
1801
1802 This file is part of the standard distribution of %sEmacs.
1803 Please contact your system administrator. "
1804                             (if vip-xemacs-p "X" "")
1805                             ))))))
1806
1807 ;; Ex source command. Loads the file specified as argument or `~/.vip'
1808 (defun ex-source ()
1809   (vip-get-ex-file)
1810   (if (string= ex-file "")
1811       (load vip-custom-file-name)
1812     (load ex-file)))
1813
1814 ;; Ex substitute command
1815 ;; If REPEAT use previous regexp which is ex-reg-exp or vip-s-string
1816 (defun ex-substitute (&optional repeat r-flag)
1817   (let ((opt-g nil)
1818         (opt-c nil)
1819         (matched-pos nil)
1820         (case-fold-search vip-case-fold-search)
1821         delim pat repl)
1822     (if repeat (setq ex-token nil) (setq delim (vip-get-ex-pat)))
1823     (if (null ex-token)
1824         (progn
1825           (setq pat (if r-flag vip-s-string ex-reg-exp))
1826           (or (stringp pat)
1827               (error "No previous pattern to use in substitution"))
1828           (setq repl ex-repl
1829                 delim (string-to-char pat)))
1830       (setq pat (if (string= ex-token "") vip-s-string ex-token))
1831       (setq vip-s-string pat
1832             ex-reg-exp pat)
1833       (setq delim (vip-get-ex-pat))
1834       (if (null ex-token)
1835           (setq ex-token ""
1836                 ex-repl "")
1837         (setq repl ex-token
1838               ex-repl ex-token)))
1839     (while (vip-get-ex-opt-gc delim)
1840       (if (string= ex-token "g") (setq opt-g t) (setq opt-c t)))
1841     (vip-get-ex-count)
1842     (if ex-count
1843         (save-excursion
1844           (if ex-addresses (goto-char (car ex-addresses)))
1845           (set-mark (point))
1846           (forward-line (1- ex-count))
1847           (setq ex-addresses (cons (point) (cons (mark t) nil))))
1848       (if (null ex-addresses)
1849           (setq ex-addresses (cons (point) (cons (point) nil)))
1850         (if (null (cdr ex-addresses))
1851             (setq ex-addresses (cons (car ex-addresses) ex-addresses)))))
1852                                         ;(setq G opt-g)
1853     (let ((beg (car ex-addresses))
1854           (end (car (cdr ex-addresses)))
1855           eol-mark)
1856       (save-excursion
1857         (vip-enlarge-region beg end)
1858         (let ((limit (save-excursion
1859                        (goto-char (max (point) (mark t)))
1860                        (point-marker))))
1861           (goto-char (min (point) (mark t)))
1862           (while (< (point) limit)
1863             (end-of-line)
1864             (setq eol-mark (point-marker))
1865             (beginning-of-line)
1866             (if opt-g
1867                 (progn
1868                   (while (and (not (eolp))
1869                               (re-search-forward pat eol-mark t))
1870                     (if (or (not opt-c) (y-or-n-p "Replace? "))
1871                         (progn
1872                           (setq matched-pos (point))
1873                           (if (not (stringp repl))
1874                               (error "Can't perform Ex substitution: No previous replacement pattern"))
1875                           (replace-match repl t))))
1876                   (end-of-line)
1877                   (vip-forward-char-carefully))
1878               (if (null pat)
1879                   (error
1880                    "Can't repeat Ex substitution: No previous regular expression"))
1881               (if (and (re-search-forward pat eol-mark t)
1882                        (or (not opt-c) (y-or-n-p "Replace? ")))
1883                   (progn
1884                     (setq matched-pos (point))
1885                     (if (not (stringp repl))
1886                         (error "Can't perform Ex substitution: No previous replacement pattern"))
1887                     (replace-match repl t)))
1888               (end-of-line)
1889               (vip-forward-char-carefully))))))
1890     (if matched-pos (goto-char matched-pos))
1891     (beginning-of-line)
1892     (if opt-c (message "done"))))
1893
1894 ;; Ex tag command
1895 (defun ex-tag ()
1896   (let (tag)
1897     (save-window-excursion
1898       (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
1899       (set-buffer vip-ex-work-buf)
1900       (skip-chars-forward " \t")
1901       (set-mark (point))
1902       (skip-chars-forward "^ |\t\n")
1903       (setq tag (buffer-substring (mark t) (point))))
1904     (if (not (string= tag "")) (setq ex-tag tag))
1905     (vip-change-state-to-emacs)
1906     (condition-case conds
1907         (progn
1908           (if (string= tag "")
1909               (find-tag ex-tag t)
1910             (find-tag-other-window ex-tag))
1911           (vip-change-state-to-vi))
1912       (error
1913        (vip-change-state-to-vi)
1914        (vip-message-conditions conds)))))
1915
1916 ;; Ex write command
1917 (defun ex-write (q-flag)
1918   (vip-default-ex-addresses t)
1919   (vip-get-ex-file)
1920   (let ((end (car ex-addresses))
1921         (beg (car (cdr ex-addresses)))
1922         (orig-buf (current-buffer))
1923         (orig-buf-file-name (buffer-file-name))
1924         (orig-buf-name (buffer-name))
1925         (buff-changed-p (buffer-modified-p))
1926         temp-buf writing-same-file region
1927         file-exists writing-whole-file)
1928     (if (> beg end) (error vip-FirstAddrExceedsSecond))
1929     (if ex-cmdfile
1930         (progn
1931           (vip-enlarge-region beg end)
1932           (shell-command-on-region (point) (mark t) ex-file))
1933       (if (and (string= ex-file "") (not (buffer-file-name)))
1934           (setq ex-file
1935                 (read-file-name
1936                  (format "Buffer %s isn't visiting any file. File to save in: "
1937                          (buffer-name)))))
1938
1939       (setq writing-whole-file (and (= (point-min) beg) (= (point-max) end))
1940             ex-file (if (string= ex-file "")
1941                         (buffer-file-name)
1942                       (expand-file-name ex-file)))
1943       ;; if ex-file is a directory use the file portion of the buffer file name
1944       (if (and (file-directory-p ex-file)
1945                buffer-file-name
1946                (not (file-directory-p buffer-file-name)))
1947           (setq ex-file
1948                 (concat (file-name-as-directory ex-file)
1949                         (file-name-nondirectory buffer-file-name))))
1950
1951       (setq file-exists (file-exists-p ex-file)
1952             writing-same-file (string= ex-file (buffer-file-name)))
1953
1954       (if (and writing-whole-file writing-same-file)
1955           (if (not (buffer-modified-p))
1956               (message "(No changes need to be saved)")
1957             (save-buffer)
1958             (save-restriction
1959                  (widen)
1960                  (ex-write-info file-exists ex-file (point-min) (point-max))
1961                  ))
1962         ;; writing some other file or portion of the current file
1963         (cond ((and file-exists
1964                     (not writing-same-file)
1965                     (not (yes-or-no-p
1966                           (format "File %s exists. Overwrite? " ex-file))))
1967                (error "Quit"))
1968               ((and writing-whole-file (not ex-append))
1969                (unwind-protect
1970                    (progn
1971                      (set-visited-file-name ex-file)
1972                      (set-buffer-modified-p t)
1973                      (save-buffer))
1974                  ;; restore the buffer file name
1975                  (set-visited-file-name orig-buf-file-name)
1976                  (set-buffer-modified-p buff-changed-p)
1977                  ;; If the buffer wasn't visiting a file, restore buffer name.
1978                  ;; Name could've been changed by packages such as uniquify.
1979                  (or orig-buf-file-name
1980                      (progn
1981                        (unlock-buffer)
1982                        (rename-buffer orig-buf-name))))
1983                (save-restriction
1984                  (widen)
1985                  (ex-write-info
1986                   file-exists ex-file (point-min) (point-max))))
1987               (t ; writing a region
1988                (unwind-protect
1989                    (save-excursion
1990                      (vip-enlarge-region beg end)
1991                      (setq region (buffer-substring (point) (mark t)))
1992                      ;; create temp buffer for the region
1993                      (setq temp-buf (get-buffer-create " *ex-write*"))
1994                      (set-buffer temp-buf)
1995                      (set-visited-file-name ex-file 'noquerry)
1996                      (erase-buffer)
1997                      (if (and file-exists ex-append)
1998                          (insert-file-contents ex-file))
1999                      (goto-char (point-max))
2000                      (insert region)
2001                      (save-buffer)
2002                      (ex-write-info
2003                       file-exists ex-file (point-min) (point-max))
2004                      ))
2005                (set-buffer temp-buf)
2006                (set-buffer-modified-p nil)
2007                (kill-buffer temp-buf))
2008               ))
2009       (set-buffer orig-buf)
2010       ;; this prevents the loss of data if writing part of the buffer
2011       (if (and (buffer-file-name) writing-same-file)
2012           (set-visited-file-modtime))
2013       (or writing-whole-file
2014           (not writing-same-file)
2015           (set-buffer-modified-p t))
2016       (if q-flag
2017           (if (< viper-expert-level 2)
2018               (save-buffers-kill-emacs)
2019             (kill-buffer (current-buffer))))
2020       )))
2021
2022
2023 (defun ex-write-info (exists file-name beg end)
2024   (message "`%s'%s %d lines, %d characters"
2025            (vip-abbreviate-file-name file-name)
2026            (if exists "" " [New file]")
2027            (count-lines beg (min (1+ end) (point-max)))
2028            (- end beg)))
2029
2030 ;; Ex yank command
2031 (defun ex-yank ()
2032   (vip-default-ex-addresses)
2033   (vip-get-ex-buffer)
2034   (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
2035     (if (> beg end) (error vip-FirstAddrExceedsSecond))
2036     (save-excursion
2037       (vip-enlarge-region beg end)
2038       (exchange-point-and-mark)
2039       (if (or ex-g-flag ex-g-variant)
2040           (error "Can't execute `yank' within `global'"))
2041       (if ex-count
2042           (progn
2043             (set-mark (point))
2044             (forward-line (1- ex-count)))
2045         (set-mark end))
2046       (vip-enlarge-region (point) (mark t))
2047       (if ex-flag (error "`yank': %s" vip-SpuriousText))
2048       (if ex-buffer
2049           (cond ((vip-valid-register ex-buffer '(Letter))
2050                  (vip-append-to-register
2051                   (downcase ex-buffer) (point) (mark t)))
2052                 ((vip-valid-register ex-buffer)
2053                  (copy-to-register ex-buffer (point) (mark t) nil))
2054                 (t (error vip-InvalidRegister ex-buffer))))
2055       (copy-region-as-kill (point) (mark t)))))
2056
2057 ;; Execute shell command
2058 (defun ex-command ()
2059   (let (command)
2060     (save-window-excursion
2061       (setq vip-ex-work-buf (get-buffer-create vip-ex-work-buf-name))
2062       (set-buffer vip-ex-work-buf)
2063       (skip-chars-forward " \t")
2064       (setq command (buffer-substring (point) (point-max)))
2065       (end-of-line))
2066     (setq command (ex-expand-filsyms command (current-buffer)))
2067     (if (and (> (length command) 0) (string= "!" (substring command 0 1)))
2068         (if vip-ex-last-shell-com
2069             (setq command (concat vip-ex-last-shell-com (substring command 1)))
2070           (error "No previous shell command")))
2071     (setq vip-ex-last-shell-com command)
2072     (if (null ex-addresses)
2073         (shell-command command)
2074       (let ((end (car ex-addresses)) (beg (car (cdr ex-addresses))))
2075         (if (null beg) (setq beg end))
2076         (save-excursion
2077           (goto-char beg)
2078           (set-mark end)
2079           (vip-enlarge-region (point) (mark t))
2080           (shell-command-on-region (point) (mark t) command t))
2081         (goto-char beg)))))
2082
2083 ;; Print line number
2084 (defun ex-line-no ()
2085   (message "%d"
2086            (1+ (count-lines
2087                 (point-min)
2088                 (if (null ex-addresses) (point-max) (car ex-addresses))))))
2089
2090 ;; Give information on the file visited by the current buffer
2091 (defun vip-info-on-file ()
2092   (interactive)
2093   (let ((pos1 (vip-line-pos 'start))
2094         (pos2 (vip-line-pos 'end))
2095         lines file info)
2096     (setq lines (count-lines (point-min) (vip-line-pos 'end))
2097           file (if (buffer-file-name)
2098                    (concat (vip-abbreviate-file-name (buffer-file-name)) ":")
2099                  (concat (buffer-name) " [Not visiting any file]:"))
2100           info (format "line=%d/%d pos=%d/%d col=%d %s"
2101                        (if (= pos1 pos2)
2102                            (1+ lines)
2103                          lines)
2104                        (count-lines (point-min) (point-max))
2105                        (point) (1- (point-max))
2106                        (1+ (current-column))
2107                        (if (buffer-modified-p) "[Modified]" "[Unchanged]")))
2108     (if (< (+ 1 (length info) (length file))
2109            (window-width (minibuffer-window)))
2110         (message (concat file " " info))
2111       (save-window-excursion
2112         (with-output-to-temp-buffer " *vip-info*"
2113           (princ (concat "\n"
2114                          file "\n\n\t" info
2115                          "\n\n\nPress any key to continue...\n\n")))
2116         (vip-read-event)
2117         (kill-buffer " *vip-info*")))
2118     ))
2119
2120 ;; display all variables set through :set
2121 (defun ex-show-vars ()
2122   (with-output-to-temp-buffer " *vip-info*"
2123     (princ (if vip-auto-indent
2124                "autoindent (local)\n" "noautoindent (local)\n"))
2125     (princ (if (default-value 'vip-auto-indent)
2126                "autoindent (global) \n" "noautoindent (global) \n"))
2127     (princ (if vip-case-fold-search "ignorecase\n" "noignorecase\n"))
2128     (princ (if vip-re-search "magic\n" "nomagic\n"))
2129     (princ (if buffer-read-only "readonly\n" "noreadonly\n"))
2130     (princ (if blink-matching-paren "showmatch\n" "noshowmatch\n"))
2131     (princ (if vip-search-wrap-around-t "wrapscan\n" "nowrapscan\n"))
2132     (princ (format "shiftwidth \t\t= %S\n" vip-shift-width))
2133     (princ (format "tabstop (local) \t= %S\n" tab-width))
2134     (princ (format "tabstop (global) \t= %S\n" (default-value 'tab-width)))
2135     (princ (format "wrapmargin (local) \t= %S\n"
2136                    (- (window-width) fill-column)))
2137     (princ (format "wrapmargin (global) \t= %S\n"
2138                    (- (window-width) (default-value 'fill-column))))
2139     (princ (format "shell \t\t\t= %S\n" (if (boundp 'explicit-shell-file-name)
2140                                             explicit-shell-file-name
2141                                           'none)))
2142     ))
2143
2144
2145
2146
2147
2148 ;;;  viper-ex.el ends here