lisp/emulation/viper-ex.el

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