| 1 | ;;; simple.el --- basic editing commands for Emacs |
| 2 | |
| 3 | ;; Copyright (C) 1985, 86, 87, 93, 94, 95 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 |
| 19 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. |
| 20 | |
| 21 | ;;; Commentary: |
| 22 | |
| 23 | ;; A grab-bag of basic Emacs commands not specifically related to some |
| 24 | ;; major mode or to file-handling. |
| 25 | |
| 26 | ;;; Code: |
| 27 | |
| 28 | (defun newline (&optional arg) |
| 29 | "Insert a newline, and move to left margin of the new line if it's blank. |
| 30 | The newline is marked with the text-property `hard'. |
| 31 | With arg, insert that many newlines. |
| 32 | In Auto Fill mode, if no numeric arg, break the preceding line if it's long." |
| 33 | (interactive "*P") |
| 34 | ;; Inserting a newline at the end of a line produces better redisplay in |
| 35 | ;; try_window_id than inserting at the beginning of a line, and the textual |
| 36 | ;; result is the same. So, if we're at beginning of line, pretend to be at |
| 37 | ;; the end of the previous line. |
| 38 | (let ((flag (and (not (bobp)) |
| 39 | (bolp) |
| 40 | (< (or (previous-property-change (point)) -2) |
| 41 | (- (point) 2)))) |
| 42 | (was-page-start (and (bolp) |
| 43 | (looking-at page-delimiter))) |
| 44 | (beforepos (point))) |
| 45 | (if flag (backward-char 1)) |
| 46 | ;; Call self-insert so that auto-fill, abbrev expansion etc. happens. |
| 47 | ;; Set last-command-char to tell self-insert what to insert. |
| 48 | (let ((last-command-char ?\n) |
| 49 | ;; Don't auto-fill if we have a numeric argument. |
| 50 | ;; Also not if flag is true (it would fill wrong line); |
| 51 | ;; there is no need to since we're at BOL. |
| 52 | (auto-fill-function (if (or arg flag) nil auto-fill-function))) |
| 53 | (unwind-protect |
| 54 | (self-insert-command (prefix-numeric-value arg)) |
| 55 | ;; If we get an error in self-insert-command, put point at right place. |
| 56 | (if flag (forward-char 1)))) |
| 57 | ;; If we did *not* get an error, cancel that forward-char. |
| 58 | (if flag (backward-char 1)) |
| 59 | ;; Mark the newline(s) `hard'. |
| 60 | (if use-hard-newlines |
| 61 | (let* ((from (- (point) (if arg (prefix-numeric-value arg) 1))) |
| 62 | (sticky (get-text-property from 'rear-nonsticky))) |
| 63 | (put-text-property from (point) 'hard 't) |
| 64 | ;; If rear-nonsticky is not "t", add 'hard to rear-nonsticky list |
| 65 | (if (and (listp sticky) (not (memq 'hard sticky))) |
| 66 | (put-text-property from (point) 'rear-nonsticky |
| 67 | (cons 'hard sticky))))) |
| 68 | ;; If the newline leaves the previous line blank, |
| 69 | ;; and we have a left margin, delete that from the blank line. |
| 70 | (or flag |
| 71 | (save-excursion |
| 72 | (goto-char beforepos) |
| 73 | (beginning-of-line) |
| 74 | (and (looking-at "[ \t]$") |
| 75 | (> (current-left-margin) 0) |
| 76 | (delete-region (point) (progn (end-of-line) (point)))))) |
| 77 | (if flag (forward-char 1)) |
| 78 | ;; Indent the line after the newline, except in one case: |
| 79 | ;; when we added the newline at the beginning of a line |
| 80 | ;; which starts a page. |
| 81 | (or was-page-start |
| 82 | (move-to-left-margin nil t))) |
| 83 | nil) |
| 84 | |
| 85 | (defun open-line (arg) |
| 86 | "Insert a newline and leave point before it. |
| 87 | If there is a fill prefix and/or a left-margin, insert them on the new line |
| 88 | if the line would have been blank. |
| 89 | With arg N, insert N newlines." |
| 90 | (interactive "*p") |
| 91 | (let* ((do-fill-prefix (and fill-prefix (bolp))) |
| 92 | (do-left-margin (and (bolp) (> (current-left-margin) 0))) |
| 93 | (loc (point))) |
| 94 | (newline arg) |
| 95 | (goto-char loc) |
| 96 | (while (> arg 0) |
| 97 | (cond ((bolp) |
| 98 | (if do-left-margin (indent-to (current-left-margin))) |
| 99 | (if do-fill-prefix (insert-and-inherit fill-prefix)))) |
| 100 | (forward-line 1) |
| 101 | (setq arg (1- arg))) |
| 102 | (goto-char loc) |
| 103 | (end-of-line))) |
| 104 | |
| 105 | (defun split-line () |
| 106 | "Split current line, moving portion beyond point vertically down." |
| 107 | (interactive "*") |
| 108 | (skip-chars-forward " \t") |
| 109 | (let ((col (current-column)) |
| 110 | (pos (point))) |
| 111 | (newline 1) |
| 112 | (indent-to col 0) |
| 113 | (goto-char pos))) |
| 114 | |
| 115 | (defun quoted-insert (arg) |
| 116 | "Read next input character and insert it. |
| 117 | This is useful for inserting control characters. |
| 118 | You may also type up to 3 octal digits, to insert a character with that code. |
| 119 | |
| 120 | In overwrite mode, this function inserts the character anyway, and |
| 121 | does not handle octal digits specially. This means that if you use |
| 122 | overwrite as your normal editing mode, you can use this function to |
| 123 | insert characters when necessary. |
| 124 | |
| 125 | In binary overwrite mode, this function does overwrite, and octal |
| 126 | digits are interpreted as a character code. This is supposed to make |
| 127 | this function useful in editing binary files." |
| 128 | (interactive "*p") |
| 129 | (let ((char (if (or (not overwrite-mode) |
| 130 | (eq overwrite-mode 'overwrite-mode-binary)) |
| 131 | (read-quoted-char) |
| 132 | (read-char)))) |
| 133 | (if (> arg 0) |
| 134 | (if (eq overwrite-mode 'overwrite-mode-binary) |
| 135 | (delete-char arg))) |
| 136 | (while (> arg 0) |
| 137 | (insert-and-inherit char) |
| 138 | (setq arg (1- arg))))) |
| 139 | |
| 140 | (defun delete-indentation (&optional arg) |
| 141 | "Join this line to previous and fix up whitespace at join. |
| 142 | If there is a fill prefix, delete it from the beginning of this line. |
| 143 | With argument, join this line to following line." |
| 144 | (interactive "*P") |
| 145 | (beginning-of-line) |
| 146 | (if arg (forward-line 1)) |
| 147 | (if (eq (preceding-char) ?\n) |
| 148 | (progn |
| 149 | (delete-region (point) (1- (point))) |
| 150 | ;; If the second line started with the fill prefix, |
| 151 | ;; delete the prefix. |
| 152 | (if (and fill-prefix |
| 153 | (<= (+ (point) (length fill-prefix)) (point-max)) |
| 154 | (string= fill-prefix |
| 155 | (buffer-substring (point) |
| 156 | (+ (point) (length fill-prefix))))) |
| 157 | (delete-region (point) (+ (point) (length fill-prefix)))) |
| 158 | (fixup-whitespace)))) |
| 159 | |
| 160 | (defun fixup-whitespace () |
| 161 | "Fixup white space between objects around point. |
| 162 | Leave one space or none, according to the context." |
| 163 | (interactive "*") |
| 164 | (save-excursion |
| 165 | (delete-horizontal-space) |
| 166 | (if (or (looking-at "^\\|\\s)") |
| 167 | (save-excursion (forward-char -1) |
| 168 | (looking-at "$\\|\\s(\\|\\s'"))) |
| 169 | nil |
| 170 | (insert ?\ )))) |
| 171 | |
| 172 | (defun delete-horizontal-space () |
| 173 | "Delete all spaces and tabs around point." |
| 174 | (interactive "*") |
| 175 | (skip-chars-backward " \t") |
| 176 | (delete-region (point) (progn (skip-chars-forward " \t") (point)))) |
| 177 | |
| 178 | (defun just-one-space () |
| 179 | "Delete all spaces and tabs around point, leaving one space." |
| 180 | (interactive "*") |
| 181 | (skip-chars-backward " \t") |
| 182 | (if (= (following-char) ? ) |
| 183 | (forward-char 1) |
| 184 | (insert ? )) |
| 185 | (delete-region (point) (progn (skip-chars-forward " \t") (point)))) |
| 186 | |
| 187 | (defun delete-blank-lines () |
| 188 | "On blank line, delete all surrounding blank lines, leaving just one. |
| 189 | On isolated blank line, delete that one. |
| 190 | On nonblank line, delete any immediately following blank lines." |
| 191 | (interactive "*") |
| 192 | (let (thisblank singleblank) |
| 193 | (save-excursion |
| 194 | (beginning-of-line) |
| 195 | (setq thisblank (looking-at "[ \t]*$")) |
| 196 | ;; Set singleblank if there is just one blank line here. |
| 197 | (setq singleblank |
| 198 | (and thisblank |
| 199 | (not (looking-at "[ \t]*\n[ \t]*$")) |
| 200 | (or (bobp) |
| 201 | (progn (forward-line -1) |
| 202 | (not (looking-at "[ \t]*$"))))))) |
| 203 | ;; Delete preceding blank lines, and this one too if it's the only one. |
| 204 | (if thisblank |
| 205 | (progn |
| 206 | (beginning-of-line) |
| 207 | (if singleblank (forward-line 1)) |
| 208 | (delete-region (point) |
| 209 | (if (re-search-backward "[^ \t\n]" nil t) |
| 210 | (progn (forward-line 1) (point)) |
| 211 | (point-min))))) |
| 212 | ;; Delete following blank lines, unless the current line is blank |
| 213 | ;; and there are no following blank lines. |
| 214 | (if (not (and thisblank singleblank)) |
| 215 | (save-excursion |
| 216 | (end-of-line) |
| 217 | (forward-line 1) |
| 218 | (delete-region (point) |
| 219 | (if (re-search-forward "[^ \t\n]" nil t) |
| 220 | (progn (beginning-of-line) (point)) |
| 221 | (point-max))))) |
| 222 | ;; Handle the special case where point is followed by newline and eob. |
| 223 | ;; Delete the line, leaving point at eob. |
| 224 | (if (looking-at "^[ \t]*\n\\'") |
| 225 | (delete-region (point) (point-max))))) |
| 226 | |
| 227 | (defun back-to-indentation () |
| 228 | "Move point to the first non-whitespace character on this line." |
| 229 | (interactive) |
| 230 | (beginning-of-line 1) |
| 231 | (skip-chars-forward " \t")) |
| 232 | |
| 233 | (defun newline-and-indent () |
| 234 | "Insert a newline, then indent according to major mode. |
| 235 | Indentation is done using the value of `indent-line-function'. |
| 236 | In programming language modes, this is the same as TAB. |
| 237 | In some text modes, where TAB inserts a tab, this command indents to the |
| 238 | column specified by the function `current-left-margin'." |
| 239 | (interactive "*") |
| 240 | (delete-region (point) (progn (skip-chars-backward " \t") (point))) |
| 241 | (newline) |
| 242 | (indent-according-to-mode)) |
| 243 | |
| 244 | (defun reindent-then-newline-and-indent () |
| 245 | "Reindent current line, insert newline, then indent the new line. |
| 246 | Indentation of both lines is done according to the current major mode, |
| 247 | which means calling the current value of `indent-line-function'. |
| 248 | In programming language modes, this is the same as TAB. |
| 249 | In some text modes, where TAB inserts a tab, this indents to the |
| 250 | column specified by the function `current-left-margin'." |
| 251 | (interactive "*") |
| 252 | (save-excursion |
| 253 | (delete-region (point) (progn (skip-chars-backward " \t") (point))) |
| 254 | (indent-according-to-mode)) |
| 255 | (newline) |
| 256 | (indent-according-to-mode)) |
| 257 | |
| 258 | ;; Internal subroutine of delete-char |
| 259 | (defun kill-forward-chars (arg) |
| 260 | (if (listp arg) (setq arg (car arg))) |
| 261 | (if (eq arg '-) (setq arg -1)) |
| 262 | (kill-region (point) (+ (point) arg))) |
| 263 | |
| 264 | ;; Internal subroutine of backward-delete-char |
| 265 | (defun kill-backward-chars (arg) |
| 266 | (if (listp arg) (setq arg (car arg))) |
| 267 | (if (eq arg '-) (setq arg -1)) |
| 268 | (kill-region (point) (- (point) arg))) |
| 269 | |
| 270 | (defun backward-delete-char-untabify (arg &optional killp) |
| 271 | "Delete characters backward, changing tabs into spaces. |
| 272 | Delete ARG chars, and kill (save in kill ring) if KILLP is non-nil. |
| 273 | Interactively, ARG is the prefix arg (default 1) |
| 274 | and KILLP is t if a prefix arg was specified." |
| 275 | (interactive "*p\nP") |
| 276 | (let ((count arg)) |
| 277 | (save-excursion |
| 278 | (while (and (> count 0) (not (bobp))) |
| 279 | (if (= (preceding-char) ?\t) |
| 280 | (let ((col (current-column))) |
| 281 | (forward-char -1) |
| 282 | (setq col (- col (current-column))) |
| 283 | (insert-char ?\ col) |
| 284 | (delete-char 1))) |
| 285 | (forward-char -1) |
| 286 | (setq count (1- count))))) |
| 287 | (delete-backward-char arg killp) |
| 288 | ;; In overwrite mode, back over columns while clearing them out, |
| 289 | ;; unless at end of line. |
| 290 | (and overwrite-mode (not (eolp)) |
| 291 | (save-excursion (insert-char ?\ arg)))) |
| 292 | |
| 293 | (defun zap-to-char (arg char) |
| 294 | "Kill up to and including ARG'th occurrence of CHAR. |
| 295 | Goes backward if ARG is negative; error if CHAR not found." |
| 296 | (interactive "p\ncZap to char: ") |
| 297 | (kill-region (point) (progn |
| 298 | (search-forward (char-to-string char) nil nil arg) |
| 299 | ; (goto-char (if (> arg 0) (1- (point)) (1+ (point)))) |
| 300 | (point)))) |
| 301 | |
| 302 | (defun beginning-of-buffer (&optional arg) |
| 303 | "Move point to the beginning of the buffer; leave mark at previous position. |
| 304 | With arg N, put point N/10 of the way from the beginning. |
| 305 | |
| 306 | If the buffer is narrowed, this command uses the beginning and size |
| 307 | of the accessible part of the buffer. |
| 308 | |
| 309 | Don't use this command in Lisp programs! |
| 310 | \(goto-char (point-min)) is faster and avoids clobbering the mark." |
| 311 | (interactive "P") |
| 312 | (push-mark) |
| 313 | (let ((size (- (point-max) (point-min)))) |
| 314 | (goto-char (if arg |
| 315 | (+ (point-min) |
| 316 | (if (> size 10000) |
| 317 | ;; Avoid overflow for large buffer sizes! |
| 318 | (* (prefix-numeric-value arg) |
| 319 | (/ size 10)) |
| 320 | (/ (+ 10 (* size (prefix-numeric-value arg))) 10))) |
| 321 | (point-min)))) |
| 322 | (if arg (forward-line 1))) |
| 323 | |
| 324 | (defun end-of-buffer (&optional arg) |
| 325 | "Move point to the end of the buffer; leave mark at previous position. |
| 326 | With arg N, put point N/10 of the way from the end. |
| 327 | |
| 328 | If the buffer is narrowed, this command uses the beginning and size |
| 329 | of the accessible part of the buffer. |
| 330 | |
| 331 | Don't use this command in Lisp programs! |
| 332 | \(goto-char (point-max)) is faster and avoids clobbering the mark." |
| 333 | (interactive "P") |
| 334 | (push-mark) |
| 335 | (let ((size (- (point-max) (point-min)))) |
| 336 | (goto-char (if arg |
| 337 | (- (point-max) |
| 338 | (if (> size 10000) |
| 339 | ;; Avoid overflow for large buffer sizes! |
| 340 | (* (prefix-numeric-value arg) |
| 341 | (/ size 10)) |
| 342 | (/ (* size (prefix-numeric-value arg)) 10))) |
| 343 | (point-max)))) |
| 344 | ;; If we went to a place in the middle of the buffer, |
| 345 | ;; adjust it to the beginning of a line. |
| 346 | (if arg (forward-line 1) |
| 347 | ;; If the end of the buffer is not already on the screen, |
| 348 | ;; then scroll specially to put it near, but not at, the bottom. |
| 349 | (if (let ((old-point (point))) |
| 350 | (save-excursion |
| 351 | (goto-char (window-start)) |
| 352 | (vertical-motion (window-height)) |
| 353 | (< (point) old-point))) |
| 354 | (progn |
| 355 | (overlay-recenter (point)) |
| 356 | (recenter -3))))) |
| 357 | |
| 358 | (defun mark-whole-buffer () |
| 359 | "Put point at beginning and mark at end of buffer. |
| 360 | You probably should not use this function in Lisp programs; |
| 361 | it is usually a mistake for a Lisp function to use any subroutine |
| 362 | that uses or sets the mark." |
| 363 | (interactive) |
| 364 | (push-mark (point)) |
| 365 | (push-mark (point-max) nil t) |
| 366 | (goto-char (point-min))) |
| 367 | |
| 368 | (defun count-lines-region (start end) |
| 369 | "Print number of lines and characters in the region." |
| 370 | (interactive "r") |
| 371 | (message "Region has %d lines, %d characters" |
| 372 | (count-lines start end) (- end start))) |
| 373 | |
| 374 | (defun what-line () |
| 375 | "Print the current line number (in the buffer) of point." |
| 376 | (interactive) |
| 377 | (save-restriction |
| 378 | (widen) |
| 379 | (save-excursion |
| 380 | (beginning-of-line) |
| 381 | (message "Line %d" |
| 382 | (1+ (count-lines 1 (point))))))) |
| 383 | |
| 384 | (defun count-lines (start end) |
| 385 | "Return number of lines between START and END. |
| 386 | This is usually the number of newlines between them, |
| 387 | but can be one more if START is not equal to END |
| 388 | and the greater of them is not at the start of a line." |
| 389 | (save-excursion |
| 390 | (save-restriction |
| 391 | (narrow-to-region start end) |
| 392 | (goto-char (point-min)) |
| 393 | (if (eq selective-display t) |
| 394 | (save-match-data |
| 395 | (let ((done 0)) |
| 396 | (while (re-search-forward "[\n\C-m]" nil t 40) |
| 397 | (setq done (+ 40 done))) |
| 398 | (while (re-search-forward "[\n\C-m]" nil t 1) |
| 399 | (setq done (+ 1 done))) |
| 400 | (goto-char (point-max)) |
| 401 | (if (and (/= start end) |
| 402 | (not (bolp))) |
| 403 | (1+ done) |
| 404 | done))) |
| 405 | (- (buffer-size) (forward-line (buffer-size))))))) |
| 406 | |
| 407 | (defun what-cursor-position () |
| 408 | "Print info on cursor position (on screen and within buffer)." |
| 409 | (interactive) |
| 410 | (let* ((char (following-char)) |
| 411 | (beg (point-min)) |
| 412 | (end (point-max)) |
| 413 | (pos (point)) |
| 414 | (total (buffer-size)) |
| 415 | (percent (if (> total 50000) |
| 416 | ;; Avoid overflow from multiplying by 100! |
| 417 | (/ (+ (/ total 200) (1- pos)) (max (/ total 100) 1)) |
| 418 | (/ (+ (/ total 2) (* 100 (1- pos))) (max total 1)))) |
| 419 | (hscroll (if (= (window-hscroll) 0) |
| 420 | "" |
| 421 | (format " Hscroll=%d" (window-hscroll)))) |
| 422 | (col (current-column))) |
| 423 | (if (= pos end) |
| 424 | (if (or (/= beg 1) (/= end (1+ total))) |
| 425 | (message "point=%d of %d(%d%%) <%d - %d> column %d %s" |
| 426 | pos total percent beg end col hscroll) |
| 427 | (message "point=%d of %d(%d%%) column %d %s" |
| 428 | pos total percent col hscroll)) |
| 429 | (if (or (/= beg 1) (/= end (1+ total))) |
| 430 | (message "Char: %s (0%o, %d, 0x%x) point=%d of %d(%d%%) <%d - %d> column %d %s" |
| 431 | (single-key-description char) char char char pos total percent beg end col hscroll) |
| 432 | (message "Char: %s (0%o, %d, 0x%x) point=%d of %d(%d%%) column %d %s" |
| 433 | (single-key-description char) char char char pos total percent col hscroll))))) |
| 434 | |
| 435 | (defun fundamental-mode () |
| 436 | "Major mode not specialized for anything in particular. |
| 437 | Other major modes are defined by comparison with this one." |
| 438 | (interactive) |
| 439 | (kill-all-local-variables)) |
| 440 | |
| 441 | (defvar read-expression-map (cons 'keymap minibuffer-local-map) |
| 442 | "Minibuffer keymap used for reading Lisp expressions.") |
| 443 | (define-key read-expression-map "\M-\t" 'lisp-complete-symbol) |
| 444 | |
| 445 | (put 'eval-expression 'disabled t) |
| 446 | |
| 447 | (defvar read-expression-history nil) |
| 448 | |
| 449 | ;; We define this, rather than making `eval' interactive, |
| 450 | ;; for the sake of completion of names like eval-region, eval-current-buffer. |
| 451 | (defun eval-expression (expression) |
| 452 | "Evaluate EXPRESSION and print value in minibuffer. |
| 453 | Value is also consed on to front of the variable `values'." |
| 454 | (interactive |
| 455 | (list (read-from-minibuffer "Eval: " |
| 456 | nil read-expression-map t |
| 457 | 'read-expression-history))) |
| 458 | (setq values (cons (eval expression) values)) |
| 459 | (prin1 (car values) t)) |
| 460 | |
| 461 | (defun edit-and-eval-command (prompt command) |
| 462 | "Prompting with PROMPT, let user edit COMMAND and eval result. |
| 463 | COMMAND is a Lisp expression. Let user edit that expression in |
| 464 | the minibuffer, then read and evaluate the result." |
| 465 | (let ((command (read-from-minibuffer prompt |
| 466 | (prin1-to-string command) |
| 467 | read-expression-map t |
| 468 | '(command-history . 1)))) |
| 469 | ;; If command was added to command-history as a string, |
| 470 | ;; get rid of that. We want only evallable expressions there. |
| 471 | (if (stringp (car command-history)) |
| 472 | (setq command-history (cdr command-history))) |
| 473 | |
| 474 | ;; If command to be redone does not match front of history, |
| 475 | ;; add it to the history. |
| 476 | (or (equal command (car command-history)) |
| 477 | (setq command-history (cons command command-history))) |
| 478 | (eval command))) |
| 479 | |
| 480 | (defun repeat-complex-command (arg) |
| 481 | "Edit and re-evaluate last complex command, or ARGth from last. |
| 482 | A complex command is one which used the minibuffer. |
| 483 | The command is placed in the minibuffer as a Lisp form for editing. |
| 484 | The result is executed, repeating the command as changed. |
| 485 | If the command has been changed or is not the most recent previous command |
| 486 | it is added to the front of the command history. |
| 487 | You can use the minibuffer history commands \\<minibuffer-local-map>\\[next-history-element] and \\[previous-history-element] |
| 488 | to get different commands to edit and resubmit." |
| 489 | (interactive "p") |
| 490 | (let ((elt (nth (1- arg) command-history)) |
| 491 | (minibuffer-history-position arg) |
| 492 | (minibuffer-history-sexp-flag t) |
| 493 | newcmd) |
| 494 | (if elt |
| 495 | (progn |
| 496 | (setq newcmd |
| 497 | (let ((print-level nil)) |
| 498 | (read-from-minibuffer |
| 499 | "Redo: " (prin1-to-string elt) read-expression-map t |
| 500 | (cons 'command-history arg)))) |
| 501 | |
| 502 | ;; If command was added to command-history as a string, |
| 503 | ;; get rid of that. We want only evallable expressions there. |
| 504 | (if (stringp (car command-history)) |
| 505 | (setq command-history (cdr command-history))) |
| 506 | |
| 507 | ;; If command to be redone does not match front of history, |
| 508 | ;; add it to the history. |
| 509 | (or (equal newcmd (car command-history)) |
| 510 | (setq command-history (cons newcmd command-history))) |
| 511 | (eval newcmd)) |
| 512 | (ding)))) |
| 513 | \f |
| 514 | (defvar minibuffer-history nil |
| 515 | "Default minibuffer history list. |
| 516 | This is used for all minibuffer input |
| 517 | except when an alternate history list is specified.") |
| 518 | (defvar minibuffer-history-sexp-flag nil |
| 519 | "Non-nil when doing history operations on `command-history'. |
| 520 | More generally, indicates that the history list being acted on |
| 521 | contains expressions rather than strings.") |
| 522 | (setq minibuffer-history-variable 'minibuffer-history) |
| 523 | (setq minibuffer-history-position nil) |
| 524 | (defvar minibuffer-history-search-history nil) |
| 525 | |
| 526 | (mapcar |
| 527 | (lambda (key-and-command) |
| 528 | (mapcar |
| 529 | (lambda (keymap-and-completionp) |
| 530 | ;; Arg is (KEYMAP-SYMBOL . COMPLETION-MAP-P). |
| 531 | ;; If the cdr of KEY-AND-COMMAND (the command) is a cons, |
| 532 | ;; its car is used if COMPLETION-MAP-P is nil, its cdr if it is t. |
| 533 | (define-key (symbol-value (car keymap-and-completionp)) |
| 534 | (car key-and-command) |
| 535 | (let ((command (cdr key-and-command))) |
| 536 | (if (consp command) |
| 537 | ;; (and ... nil) => ... turns back on the completion-oriented |
| 538 | ;; history commands which rms turned off since they seem to |
| 539 | ;; do things he doesn't like. |
| 540 | (if (and (cdr keymap-and-completionp) nil) ;XXX turned off |
| 541 | (progn (error "EMACS BUG!") (cdr command)) |
| 542 | (car command)) |
| 543 | command)))) |
| 544 | '((minibuffer-local-map . nil) |
| 545 | (minibuffer-local-ns-map . nil) |
| 546 | (minibuffer-local-completion-map . t) |
| 547 | (minibuffer-local-must-match-map . t) |
| 548 | (read-expression-map . nil)))) |
| 549 | '(("\en" . (next-history-element . next-complete-history-element)) |
| 550 | ([next] . (next-history-element . next-complete-history-element)) |
| 551 | ("\ep" . (previous-history-element . previous-complete-history-element)) |
| 552 | ([prior] . (previous-history-element . previous-complete-history-element)) |
| 553 | ("\er" . previous-matching-history-element) |
| 554 | ("\es" . next-matching-history-element))) |
| 555 | |
| 556 | (defun previous-matching-history-element (regexp n) |
| 557 | "Find the previous history element that matches REGEXP. |
| 558 | \(Previous history elements refer to earlier actions.) |
| 559 | With prefix argument N, search for Nth previous match. |
| 560 | If N is negative, find the next or Nth next match." |
| 561 | (interactive |
| 562 | (let* ((enable-recursive-minibuffers t) |
| 563 | (minibuffer-history-sexp-flag nil) |
| 564 | (regexp (read-from-minibuffer "Previous element matching (regexp): " |
| 565 | nil |
| 566 | minibuffer-local-map |
| 567 | nil |
| 568 | 'minibuffer-history-search-history))) |
| 569 | ;; Use the last regexp specified, by default, if input is empty. |
| 570 | (list (if (string= regexp "") |
| 571 | (if minibuffer-history-search-history |
| 572 | (car minibuffer-history-search-history) |
| 573 | (error "No previous history search regexp")) |
| 574 | regexp) |
| 575 | (prefix-numeric-value current-prefix-arg)))) |
| 576 | (let ((history (symbol-value minibuffer-history-variable)) |
| 577 | prevpos |
| 578 | (pos minibuffer-history-position)) |
| 579 | (while (/= n 0) |
| 580 | (setq prevpos pos) |
| 581 | (setq pos (min (max 1 (+ pos (if (< n 0) -1 1))) (length history))) |
| 582 | (if (= pos prevpos) |
| 583 | (error (if (= pos 1) |
| 584 | "No later matching history item" |
| 585 | "No earlier matching history item"))) |
| 586 | (if (string-match regexp |
| 587 | (if minibuffer-history-sexp-flag |
| 588 | (let ((print-level nil)) |
| 589 | (prin1-to-string (nth (1- pos) history))) |
| 590 | (nth (1- pos) history))) |
| 591 | (setq n (+ n (if (< n 0) 1 -1))))) |
| 592 | (setq minibuffer-history-position pos) |
| 593 | (erase-buffer) |
| 594 | (let ((elt (nth (1- pos) history))) |
| 595 | (insert (if minibuffer-history-sexp-flag |
| 596 | (let ((print-level nil)) |
| 597 | (prin1-to-string elt)) |
| 598 | elt))) |
| 599 | (goto-char (point-min))) |
| 600 | (if (or (eq (car (car command-history)) 'previous-matching-history-element) |
| 601 | (eq (car (car command-history)) 'next-matching-history-element)) |
| 602 | (setq command-history (cdr command-history)))) |
| 603 | |
| 604 | (defun next-matching-history-element (regexp n) |
| 605 | "Find the next history element that matches REGEXP. |
| 606 | \(The next history element refers to a more recent action.) |
| 607 | With prefix argument N, search for Nth next match. |
| 608 | If N is negative, find the previous or Nth previous match." |
| 609 | (interactive |
| 610 | (let* ((enable-recursive-minibuffers t) |
| 611 | (minibuffer-history-sexp-flag nil) |
| 612 | (regexp (read-from-minibuffer "Next element matching (regexp): " |
| 613 | nil |
| 614 | minibuffer-local-map |
| 615 | nil |
| 616 | 'minibuffer-history-search-history))) |
| 617 | ;; Use the last regexp specified, by default, if input is empty. |
| 618 | (list (if (string= regexp "") |
| 619 | (setcar minibuffer-history-search-history |
| 620 | (nth 1 minibuffer-history-search-history)) |
| 621 | regexp) |
| 622 | (prefix-numeric-value current-prefix-arg)))) |
| 623 | (previous-matching-history-element regexp (- n))) |
| 624 | |
| 625 | (defun next-history-element (n) |
| 626 | "Insert the next element of the minibuffer history into the minibuffer." |
| 627 | (interactive "p") |
| 628 | (or (zerop n) |
| 629 | (let ((narg (min (max 1 (- minibuffer-history-position n)) |
| 630 | (length (symbol-value minibuffer-history-variable))))) |
| 631 | (if (or (zerop narg) |
| 632 | (= minibuffer-history-position narg)) |
| 633 | (error (if (if (zerop narg) |
| 634 | (> n 0) |
| 635 | (= minibuffer-history-position 1)) |
| 636 | "End of history; no next item" |
| 637 | "Beginning of history; no preceding item")) |
| 638 | (erase-buffer) |
| 639 | (setq minibuffer-history-position narg) |
| 640 | (let ((elt (nth (1- minibuffer-history-position) |
| 641 | (symbol-value minibuffer-history-variable)))) |
| 642 | (insert |
| 643 | (if minibuffer-history-sexp-flag |
| 644 | (let ((print-level nil)) |
| 645 | (prin1-to-string elt)) |
| 646 | elt))) |
| 647 | (goto-char (point-min)))))) |
| 648 | |
| 649 | (defun previous-history-element (n) |
| 650 | "Inserts the previous element of the minibuffer history into the minibuffer." |
| 651 | (interactive "p") |
| 652 | (next-history-element (- n))) |
| 653 | |
| 654 | (defun next-complete-history-element (n) |
| 655 | "Get next element of history which is a completion of minibuffer contents." |
| 656 | (interactive "p") |
| 657 | (let ((point-at-start (point))) |
| 658 | (next-matching-history-element |
| 659 | (concat "^" (regexp-quote (buffer-substring (point-min) (point)))) n) |
| 660 | ;; next-matching-history-element always puts us at (point-min). |
| 661 | ;; Move to the position we were at before changing the buffer contents. |
| 662 | ;; This is still sensical, because the text before point has not changed. |
| 663 | (goto-char point-at-start))) |
| 664 | |
| 665 | (defun previous-complete-history-element (n) |
| 666 | "\ |
| 667 | Get previous element of history which is a completion of minibuffer contents." |
| 668 | (interactive "p") |
| 669 | (next-complete-history-element (- n))) |
| 670 | \f |
| 671 | (defun goto-line (arg) |
| 672 | "Goto line ARG, counting from line 1 at beginning of buffer." |
| 673 | (interactive "NGoto line: ") |
| 674 | (setq arg (prefix-numeric-value arg)) |
| 675 | (save-restriction |
| 676 | (widen) |
| 677 | (goto-char 1) |
| 678 | (if (eq selective-display t) |
| 679 | (re-search-forward "[\n\C-m]" nil 'end (1- arg)) |
| 680 | (forward-line (1- arg))))) |
| 681 | |
| 682 | ;Put this on C-x u, so we can force that rather than C-_ into startup msg |
| 683 | (define-function 'advertised-undo 'undo) |
| 684 | |
| 685 | (defun undo (&optional arg) |
| 686 | "Undo some previous changes. |
| 687 | Repeat this command to undo more changes. |
| 688 | A numeric argument serves as a repeat count." |
| 689 | (interactive "*p") |
| 690 | ;; If we don't get all the way thru, make last-command indicate that |
| 691 | ;; for the following command. |
| 692 | (setq this-command t) |
| 693 | (let ((modified (buffer-modified-p)) |
| 694 | (recent-save (recent-auto-save-p))) |
| 695 | (or (eq (selected-window) (minibuffer-window)) |
| 696 | (message "Undo!")) |
| 697 | (or (eq last-command 'undo) |
| 698 | (progn (undo-start) |
| 699 | (undo-more 1))) |
| 700 | (undo-more (or arg 1)) |
| 701 | ;; Don't specify a position in the undo record for the undo command. |
| 702 | ;; Instead, undoing this should move point to where the change is. |
| 703 | (let ((tail buffer-undo-list) |
| 704 | done) |
| 705 | (while (and tail (not done) (not (null (car tail)))) |
| 706 | (if (integerp (car tail)) |
| 707 | (progn |
| 708 | (setq done t) |
| 709 | (setq buffer-undo-list (delq (car tail) buffer-undo-list)))) |
| 710 | (setq tail (cdr tail)))) |
| 711 | (and modified (not (buffer-modified-p)) |
| 712 | (delete-auto-save-file-if-necessary recent-save))) |
| 713 | ;; If we do get all the way thru, make this-command indicate that. |
| 714 | (setq this-command 'undo)) |
| 715 | |
| 716 | (defvar pending-undo-list nil |
| 717 | "Within a run of consecutive undo commands, list remaining to be undone.") |
| 718 | |
| 719 | (defun undo-start () |
| 720 | "Set `pending-undo-list' to the front of the undo list. |
| 721 | The next call to `undo-more' will undo the most recently made change." |
| 722 | (if (eq buffer-undo-list t) |
| 723 | (error "No undo information in this buffer")) |
| 724 | (setq pending-undo-list buffer-undo-list)) |
| 725 | |
| 726 | (defun undo-more (count) |
| 727 | "Undo back N undo-boundaries beyond what was already undone recently. |
| 728 | Call `undo-start' to get ready to undo recent changes, |
| 729 | then call `undo-more' one or more times to undo them." |
| 730 | (or pending-undo-list |
| 731 | (error "No further undo information")) |
| 732 | (setq pending-undo-list (primitive-undo count pending-undo-list))) |
| 733 | |
| 734 | (defvar shell-command-history nil |
| 735 | "History list for some commands that read shell commands.") |
| 736 | |
| 737 | (defvar shell-command-switch "-c" |
| 738 | "Switch used to have the shell execute its command line argument.") |
| 739 | |
| 740 | (defun shell-command (command &optional output-buffer) |
| 741 | "Execute string COMMAND in inferior shell; display output, if any. |
| 742 | |
| 743 | If COMMAND ends in ampersand, execute it asynchronously. |
| 744 | The output appears in the buffer `*Async Shell Command*'. |
| 745 | That buffer is in shell mode. |
| 746 | |
| 747 | Otherwise, COMMAND is executed synchronously. The output appears in the |
| 748 | buffer `*Shell Command Output*'. |
| 749 | If the output is one line, it is displayed in the echo area *as well*, |
| 750 | but it is nonetheless available in buffer `*Shell Command Output*', |
| 751 | even though that buffer is not automatically displayed. |
| 752 | If there is no output, or if output is inserted in the current buffer, |
| 753 | then `*Shell Command Output*' is deleted. |
| 754 | |
| 755 | The optional second argument OUTPUT-BUFFER, if non-nil, |
| 756 | says to put the output in some other buffer. |
| 757 | If OUTPUT-BUFFER is a buffer or buffer name, put the output there. |
| 758 | If OUTPUT-BUFFER is not a buffer and not nil, |
| 759 | insert output in current buffer. (This cannot be done asynchronously.) |
| 760 | In either case, the output is inserted after point (leaving mark after it)." |
| 761 | (interactive (list (read-from-minibuffer "Shell command: " |
| 762 | nil nil nil 'shell-command-history) |
| 763 | current-prefix-arg)) |
| 764 | (if (and output-buffer |
| 765 | (not (or (bufferp output-buffer) (stringp output-buffer)))) |
| 766 | (progn (barf-if-buffer-read-only) |
| 767 | (push-mark) |
| 768 | ;; We do not use -f for csh; we will not support broken use of |
| 769 | ;; .cshrcs. Even the BSD csh manual says to use |
| 770 | ;; "if ($?prompt) exit" before things which are not useful |
| 771 | ;; non-interactively. Besides, if someone wants their other |
| 772 | ;; aliases for shell commands then they can still have them. |
| 773 | (call-process shell-file-name nil t nil |
| 774 | shell-command-switch command) |
| 775 | ;; This is like exchange-point-and-mark, but doesn't |
| 776 | ;; activate the mark. It is cleaner to avoid activation, |
| 777 | ;; even though the command loop would deactivate the mark |
| 778 | ;; because we inserted text. |
| 779 | (goto-char (prog1 (mark t) |
| 780 | (set-marker (mark-marker) (point) |
| 781 | (current-buffer))))) |
| 782 | ;; Preserve the match data in case called from a program. |
| 783 | (save-match-data |
| 784 | (if (string-match "[ \t]*&[ \t]*$" command) |
| 785 | ;; Command ending with ampersand means asynchronous. |
| 786 | (let ((buffer (get-buffer-create |
| 787 | (or output-buffer "*Asynch Shell Command*"))) |
| 788 | (directory default-directory) |
| 789 | proc) |
| 790 | ;; Remove the ampersand. |
| 791 | (setq command (substring command 0 (match-beginning 0))) |
| 792 | ;; If will kill a process, query first. |
| 793 | (setq proc (get-buffer-process buffer)) |
| 794 | (if proc |
| 795 | (if (yes-or-no-p "A command is running. Kill it? ") |
| 796 | (kill-process proc) |
| 797 | (error "Shell command in progress"))) |
| 798 | (save-excursion |
| 799 | (set-buffer buffer) |
| 800 | (setq buffer-read-only nil) |
| 801 | (erase-buffer) |
| 802 | (display-buffer buffer) |
| 803 | (setq default-directory directory) |
| 804 | (setq proc (start-process "Shell" buffer shell-file-name |
| 805 | shell-command-switch command)) |
| 806 | (setq mode-line-process '(":%s")) |
| 807 | (require 'shell) (shell-mode) |
| 808 | (set-process-sentinel proc 'shell-command-sentinel) |
| 809 | )) |
| 810 | (shell-command-on-region (point) (point) command nil) |
| 811 | )))) |
| 812 | |
| 813 | ;; We have a sentinel to prevent insertion of a termination message |
| 814 | ;; in the buffer itself. |
| 815 | (defun shell-command-sentinel (process signal) |
| 816 | (if (memq (process-status process) '(exit signal)) |
| 817 | (message "%s: %s." |
| 818 | (car (cdr (cdr (process-command process)))) |
| 819 | (substring signal 0 -1)))) |
| 820 | |
| 821 | (defun shell-command-on-region (start end command |
| 822 | &optional output-buffer replace) |
| 823 | "Execute string COMMAND in inferior shell with region as input. |
| 824 | Normally display output (if any) in temp buffer `*Shell Command Output*'; |
| 825 | Prefix arg means replace the region with it. |
| 826 | |
| 827 | The noninteractive arguments are START, END, COMMAND, OUTPUT-BUFFER, REPLACE. |
| 828 | If REPLACE is non-nil, that means insert the output |
| 829 | in place of text from START to END, putting point and mark around it. |
| 830 | |
| 831 | If the output is one line, it is displayed in the echo area, |
| 832 | but it is nonetheless available in buffer `*Shell Command Output*' |
| 833 | even though that buffer is not automatically displayed. |
| 834 | If there is no output, or if output is inserted in the current buffer, |
| 835 | then `*Shell Command Output*' is deleted. |
| 836 | |
| 837 | If the optional fourth argument OUTPUT-BUFFER is non-nil, |
| 838 | that says to put the output in some other buffer. |
| 839 | If OUTPUT-BUFFER is a buffer or buffer name, put the output there. |
| 840 | If OUTPUT-BUFFER is not a buffer and not nil, |
| 841 | insert output in the current buffer. |
| 842 | In either case, the output is inserted after point (leaving mark after it)." |
| 843 | (interactive (let ((string |
| 844 | ;; Do this before calling region-beginning |
| 845 | ;; and region-end, in case subprocess output |
| 846 | ;; relocates them while we are in the minibuffer. |
| 847 | (read-from-minibuffer "Shell command on region: " |
| 848 | nil nil nil |
| 849 | 'shell-command-history))) |
| 850 | (list (point) (mark) |
| 851 | string |
| 852 | current-prefix-arg |
| 853 | current-prefix-arg))) |
| 854 | (if (or replace |
| 855 | (and output-buffer |
| 856 | (not (or (bufferp output-buffer) (stringp output-buffer))))) |
| 857 | ;; Replace specified region with output from command. |
| 858 | (let ((swap (and replace (< start end)))) |
| 859 | ;; Don't muck with mark unless REPLACE says we should. |
| 860 | (goto-char start) |
| 861 | (and replace (push-mark)) |
| 862 | (call-process-region start end shell-file-name t t nil |
| 863 | shell-command-switch command) |
| 864 | (let ((shell-buffer (get-buffer "*Shell Command Output*"))) |
| 865 | (and shell-buffer (not (eq shell-buffer (current-buffer))) |
| 866 | (kill-buffer shell-buffer))) |
| 867 | ;; Don't muck with mark unless REPLACE says we should. |
| 868 | (and replace swap (exchange-point-and-mark))) |
| 869 | ;; No prefix argument: put the output in a temp buffer, |
| 870 | ;; replacing its entire contents. |
| 871 | (let ((buffer (get-buffer-create |
| 872 | (or output-buffer "*Shell Command Output*"))) |
| 873 | (success nil)) |
| 874 | (unwind-protect |
| 875 | (if (eq buffer (current-buffer)) |
| 876 | ;; If the input is the same buffer as the output, |
| 877 | ;; delete everything but the specified region, |
| 878 | ;; then replace that region with the output. |
| 879 | (progn (setq buffer-read-only nil) |
| 880 | (delete-region (max start end) (point-max)) |
| 881 | (delete-region (point-min) (max start end)) |
| 882 | (call-process-region (point-min) (point-max) |
| 883 | shell-file-name t t nil |
| 884 | shell-command-switch command) |
| 885 | (setq success t)) |
| 886 | ;; Clear the output buffer, then run the command with output there. |
| 887 | (save-excursion |
| 888 | (set-buffer buffer) |
| 889 | (setq buffer-read-only nil) |
| 890 | (erase-buffer)) |
| 891 | (call-process-region start end shell-file-name |
| 892 | nil buffer nil |
| 893 | shell-command-switch command) |
| 894 | (setq success t)) |
| 895 | ;; Report the amount of output. |
| 896 | (let ((lines (save-excursion |
| 897 | (set-buffer buffer) |
| 898 | (if (= (buffer-size) 0) |
| 899 | 0 |
| 900 | (count-lines (point-min) (point-max)))))) |
| 901 | (cond ((= lines 0) |
| 902 | (if success |
| 903 | (message "(Shell command completed with no output)")) |
| 904 | (kill-buffer buffer)) |
| 905 | ((and success (= lines 1)) |
| 906 | (message "%s" |
| 907 | (save-excursion |
| 908 | (set-buffer buffer) |
| 909 | (goto-char (point-min)) |
| 910 | (buffer-substring (point) |
| 911 | (progn (end-of-line) (point)))))) |
| 912 | (t |
| 913 | (set-window-start (display-buffer buffer) 1)))))))) |
| 914 | \f |
| 915 | (defconst universal-argument-map |
| 916 | (let ((map (make-sparse-keymap))) |
| 917 | (define-key map [t] 'universal-argument-other-key) |
| 918 | (define-key map (vector meta-prefix-char t) 'universal-argument-other-key) |
| 919 | (define-key map [switch-frame] nil) |
| 920 | (define-key map [?\C-u] 'universal-argument-more) |
| 921 | (define-key map [?-] 'universal-argument-minus) |
| 922 | (define-key map [?0] 'digit-argument) |
| 923 | (define-key map [?1] 'digit-argument) |
| 924 | (define-key map [?2] 'digit-argument) |
| 925 | (define-key map [?3] 'digit-argument) |
| 926 | (define-key map [?4] 'digit-argument) |
| 927 | (define-key map [?5] 'digit-argument) |
| 928 | (define-key map [?6] 'digit-argument) |
| 929 | (define-key map [?7] 'digit-argument) |
| 930 | (define-key map [?8] 'digit-argument) |
| 931 | (define-key map [?9] 'digit-argument) |
| 932 | map) |
| 933 | "Keymap used while processing \\[universal-argument].") |
| 934 | |
| 935 | (defvar universal-argument-num-events nil |
| 936 | "Number of argument-specifying events read by `universal-argument'. |
| 937 | `universal-argument-other-key' uses this to discard those events |
| 938 | from (this-command-keys), and reread only the final command.") |
| 939 | |
| 940 | (defun universal-argument () |
| 941 | "Begin a numeric argument for the following command. |
| 942 | Digits or minus sign following \\[universal-argument] make up the numeric argument. |
| 943 | \\[universal-argument] following the digits or minus sign ends the argument. |
| 944 | \\[universal-argument] without digits or minus sign provides 4 as argument. |
| 945 | Repeating \\[universal-argument] without digits or minus sign |
| 946 | multiplies the argument by 4 each time." |
| 947 | (interactive) |
| 948 | (setq prefix-arg (list 4)) |
| 949 | (setq universal-argument-num-events (length (this-command-keys))) |
| 950 | (setq overriding-terminal-local-map universal-argument-map)) |
| 951 | |
| 952 | ;; A subsequent C-u means to multiply the factor by 4 if we've typed |
| 953 | ;; nothing but C-u's; otherwise it means to terminate the prefix arg. |
| 954 | (defun universal-argument-more (arg) |
| 955 | (interactive "P") |
| 956 | (if (consp arg) |
| 957 | (setq prefix-arg (list (* 4 (car arg)))) |
| 958 | (setq prefix-arg arg) |
| 959 | (setq overriding-terminal-local-map nil)) |
| 960 | (setq universal-argument-num-events (length (this-command-keys)))) |
| 961 | |
| 962 | (defun negative-argument (arg) |
| 963 | "Begin a negative numeric argument for the next command. |
| 964 | \\[universal-argument] following digits or minus sign ends the argument." |
| 965 | (interactive "P") |
| 966 | (cond ((integerp arg) |
| 967 | (setq prefix-arg (- arg))) |
| 968 | ((eq arg '-) |
| 969 | (setq prefix-arg nil)) |
| 970 | (t |
| 971 | (setq prefix-arg '-))) |
| 972 | (setq universal-argument-num-events (length (this-command-keys))) |
| 973 | (setq overriding-terminal-local-map universal-argument-map)) |
| 974 | |
| 975 | (defun digit-argument (arg) |
| 976 | "Part of the numeric argument for the next command. |
| 977 | \\[universal-argument] following digits or minus sign ends the argument." |
| 978 | (interactive "P") |
| 979 | (let ((digit (- (logand last-command-char ?\177) ?0))) |
| 980 | (cond ((integerp arg) |
| 981 | (setq prefix-arg (+ (* arg 10) |
| 982 | (if (< arg 0) (- digit) digit)))) |
| 983 | ((eq arg '-) |
| 984 | ;; Treat -0 as just -, so that -01 will work. |
| 985 | (setq prefix-arg (if (zerop digit) '- (- digit)))) |
| 986 | (t |
| 987 | (setq prefix-arg digit)))) |
| 988 | (setq universal-argument-num-events (length (this-command-keys))) |
| 989 | (setq overriding-terminal-local-map universal-argument-map)) |
| 990 | |
| 991 | ;; For backward compatibility, minus with no modifiers is an ordinary |
| 992 | ;; command if digits have already been entered. |
| 993 | (defun universal-argument-minus (arg) |
| 994 | (interactive "P") |
| 995 | (if (integerp arg) |
| 996 | (universal-argument-other-key arg) |
| 997 | (negative-argument arg))) |
| 998 | |
| 999 | ;; Anything else terminates the argument and is left in the queue to be |
| 1000 | ;; executed as a command. |
| 1001 | (defun universal-argument-other-key (arg) |
| 1002 | (interactive "P") |
| 1003 | (setq prefix-arg arg) |
| 1004 | (let* ((key (this-command-keys)) |
| 1005 | (keylist (listify-key-sequence key))) |
| 1006 | (setq unread-command-events |
| 1007 | (nthcdr universal-argument-num-events keylist))) |
| 1008 | (reset-this-command-lengths) |
| 1009 | (setq overriding-terminal-local-map nil)) |
| 1010 | \f |
| 1011 | (defun forward-to-indentation (arg) |
| 1012 | "Move forward ARG lines and position at first nonblank character." |
| 1013 | (interactive "p") |
| 1014 | (forward-line arg) |
| 1015 | (skip-chars-forward " \t")) |
| 1016 | |
| 1017 | (defun backward-to-indentation (arg) |
| 1018 | "Move backward ARG lines and position at first nonblank character." |
| 1019 | (interactive "p") |
| 1020 | (forward-line (- arg)) |
| 1021 | (skip-chars-forward " \t")) |
| 1022 | |
| 1023 | (defvar kill-whole-line nil |
| 1024 | "*If non-nil, `kill-line' with no arg at beg of line kills the whole line.") |
| 1025 | |
| 1026 | (defun kill-line (&optional arg) |
| 1027 | "Kill the rest of the current line; if no nonblanks there, kill thru newline. |
| 1028 | With prefix argument, kill that many lines from point. |
| 1029 | Negative arguments kill lines backward. |
| 1030 | |
| 1031 | When calling from a program, nil means \"no arg\", |
| 1032 | a number counts as a prefix arg. |
| 1033 | |
| 1034 | If `kill-whole-line' is non-nil, then kill the whole line |
| 1035 | when given no argument at the beginning of a line." |
| 1036 | (interactive "P") |
| 1037 | (kill-region (point) |
| 1038 | ;; It is better to move point to the other end of the kill |
| 1039 | ;; before killing. That way, in a read-only buffer, point |
| 1040 | ;; moves across the text that is copied to the kill ring. |
| 1041 | ;; The choice has no effect on undo now that undo records |
| 1042 | ;; the value of point from before the command was run. |
| 1043 | (progn |
| 1044 | (if arg |
| 1045 | (forward-line (prefix-numeric-value arg)) |
| 1046 | (if (eobp) |
| 1047 | (signal 'end-of-buffer nil)) |
| 1048 | (if (or (looking-at "[ \t]*$") (and kill-whole-line (bolp))) |
| 1049 | (forward-line 1) |
| 1050 | (end-of-line))) |
| 1051 | (point)))) |
| 1052 | \f |
| 1053 | ;;;; Window system cut and paste hooks. |
| 1054 | |
| 1055 | (defvar interprogram-cut-function nil |
| 1056 | "Function to call to make a killed region available to other programs. |
| 1057 | |
| 1058 | Most window systems provide some sort of facility for cutting and |
| 1059 | pasting text between the windows of different programs. |
| 1060 | This variable holds a function that Emacs calls whenever text |
| 1061 | is put in the kill ring, to make the new kill available to other |
| 1062 | programs. |
| 1063 | |
| 1064 | The function takes one or two arguments. |
| 1065 | The first argument, TEXT, is a string containing |
| 1066 | the text which should be made available. |
| 1067 | The second, PUSH, if non-nil means this is a \"new\" kill; |
| 1068 | nil means appending to an \"old\" kill.") |
| 1069 | |
| 1070 | (defvar interprogram-paste-function nil |
| 1071 | "Function to call to get text cut from other programs. |
| 1072 | |
| 1073 | Most window systems provide some sort of facility for cutting and |
| 1074 | pasting text between the windows of different programs. |
| 1075 | This variable holds a function that Emacs calls to obtain |
| 1076 | text that other programs have provided for pasting. |
| 1077 | |
| 1078 | The function should be called with no arguments. If the function |
| 1079 | returns nil, then no other program has provided such text, and the top |
| 1080 | of the Emacs kill ring should be used. If the function returns a |
| 1081 | string, that string should be put in the kill ring as the latest kill. |
| 1082 | |
| 1083 | Note that the function should return a string only if a program other |
| 1084 | than Emacs has provided a string for pasting; if Emacs provided the |
| 1085 | most recent string, the function should return nil. If it is |
| 1086 | difficult to tell whether Emacs or some other program provided the |
| 1087 | current string, it is probably good enough to return nil if the string |
| 1088 | is equal (according to `string=') to the last text Emacs provided.") |
| 1089 | |
| 1090 | |
| 1091 | \f |
| 1092 | ;;;; The kill ring data structure. |
| 1093 | |
| 1094 | (defvar kill-ring nil |
| 1095 | "List of killed text sequences. |
| 1096 | Since the kill ring is supposed to interact nicely with cut-and-paste |
| 1097 | facilities offered by window systems, use of this variable should |
| 1098 | interact nicely with `interprogram-cut-function' and |
| 1099 | `interprogram-paste-function'. The functions `kill-new', |
| 1100 | `kill-append', and `current-kill' are supposed to implement this |
| 1101 | interaction; you may want to use them instead of manipulating the kill |
| 1102 | ring directly.") |
| 1103 | |
| 1104 | (defconst kill-ring-max 30 |
| 1105 | "*Maximum length of kill ring before oldest elements are thrown away.") |
| 1106 | |
| 1107 | (defvar kill-ring-yank-pointer nil |
| 1108 | "The tail of the kill ring whose car is the last thing yanked.") |
| 1109 | |
| 1110 | (defun kill-new (string &optional replace) |
| 1111 | "Make STRING the latest kill in the kill ring. |
| 1112 | Set the kill-ring-yank pointer to point to it. |
| 1113 | If `interprogram-cut-function' is non-nil, apply it to STRING. |
| 1114 | Optional second argument REPLACE non-nil means that STRING will replace |
| 1115 | the front of the kill ring, rather than being added to the list." |
| 1116 | (and (fboundp 'menu-bar-update-yank-menu) |
| 1117 | (menu-bar-update-yank-menu string (and replace (car kill-ring)))) |
| 1118 | (if replace |
| 1119 | (setcar kill-ring string) |
| 1120 | (setq kill-ring (cons string kill-ring)) |
| 1121 | (if (> (length kill-ring) kill-ring-max) |
| 1122 | (setcdr (nthcdr (1- kill-ring-max) kill-ring) nil))) |
| 1123 | (setq kill-ring-yank-pointer kill-ring) |
| 1124 | (if interprogram-cut-function |
| 1125 | (funcall interprogram-cut-function string t))) |
| 1126 | |
| 1127 | (defun kill-append (string before-p) |
| 1128 | "Append STRING to the end of the latest kill in the kill ring. |
| 1129 | If BEFORE-P is non-nil, prepend STRING to the kill. |
| 1130 | If `interprogram-cut-function' is set, pass the resulting kill to |
| 1131 | it." |
| 1132 | (kill-new (if before-p |
| 1133 | (concat string (car kill-ring)) |
| 1134 | (concat (car kill-ring) string)) t)) |
| 1135 | |
| 1136 | (defun current-kill (n &optional do-not-move) |
| 1137 | "Rotate the yanking point by N places, and then return that kill. |
| 1138 | If N is zero, `interprogram-paste-function' is set, and calling it |
| 1139 | returns a string, then that string is added to the front of the |
| 1140 | kill ring and returned as the latest kill. |
| 1141 | If optional arg DO-NOT-MOVE is non-nil, then don't actually move the |
| 1142 | yanking point; just return the Nth kill forward." |
| 1143 | (let ((interprogram-paste (and (= n 0) |
| 1144 | interprogram-paste-function |
| 1145 | (funcall interprogram-paste-function)))) |
| 1146 | (if interprogram-paste |
| 1147 | (progn |
| 1148 | ;; Disable the interprogram cut function when we add the new |
| 1149 | ;; text to the kill ring, so Emacs doesn't try to own the |
| 1150 | ;; selection, with identical text. |
| 1151 | (let ((interprogram-cut-function nil)) |
| 1152 | (kill-new interprogram-paste)) |
| 1153 | interprogram-paste) |
| 1154 | (or kill-ring (error "Kill ring is empty")) |
| 1155 | (let ((ARGth-kill-element |
| 1156 | (nthcdr (mod (- n (length kill-ring-yank-pointer)) |
| 1157 | (length kill-ring)) |
| 1158 | kill-ring))) |
| 1159 | (or do-not-move |
| 1160 | (setq kill-ring-yank-pointer ARGth-kill-element)) |
| 1161 | (car ARGth-kill-element))))) |
| 1162 | |
| 1163 | |
| 1164 | \f |
| 1165 | ;;;; Commands for manipulating the kill ring. |
| 1166 | |
| 1167 | (defvar kill-read-only-ok nil |
| 1168 | "*Non-nil means don't signal an error for killing read-only text.") |
| 1169 | |
| 1170 | (defun kill-region (beg end) |
| 1171 | "Kill between point and mark. |
| 1172 | The text is deleted but saved in the kill ring. |
| 1173 | The command \\[yank] can retrieve it from there. |
| 1174 | \(If you want to kill and then yank immediately, use \\[copy-region-as-kill].) |
| 1175 | If the buffer is read-only, Emacs will beep and refrain from deleting |
| 1176 | the text, but put the text in the kill ring anyway. This means that |
| 1177 | you can use the killing commands to copy text from a read-only buffer. |
| 1178 | |
| 1179 | This is the primitive for programs to kill text (as opposed to deleting it). |
| 1180 | Supply two arguments, character numbers indicating the stretch of text |
| 1181 | to be killed. |
| 1182 | Any command that calls this function is a \"kill command\". |
| 1183 | If the previous command was also a kill command, |
| 1184 | the text killed this time appends to the text killed last time |
| 1185 | to make one entry in the kill ring." |
| 1186 | (interactive "r") |
| 1187 | (cond |
| 1188 | |
| 1189 | ;; If the buffer is read-only, we should beep, in case the person |
| 1190 | ;; just isn't aware of this. However, there's no harm in putting |
| 1191 | ;; the region's text in the kill ring, anyway. |
| 1192 | ((or (and buffer-read-only (not inhibit-read-only)) |
| 1193 | (text-property-not-all beg end 'read-only nil)) |
| 1194 | (copy-region-as-kill beg end) |
| 1195 | ;; This should always barf, and give us the correct error. |
| 1196 | (if kill-read-only-ok |
| 1197 | (message "Read only text copied to kill ring") |
| 1198 | (setq this-command 'kill-region) |
| 1199 | (barf-if-buffer-read-only))) |
| 1200 | |
| 1201 | ;; In certain cases, we can arrange for the undo list and the kill |
| 1202 | ;; ring to share the same string object. This code does that. |
| 1203 | ((not (or (eq buffer-undo-list t) |
| 1204 | (eq last-command 'kill-region) |
| 1205 | ;; Use = since positions may be numbers or markers. |
| 1206 | (= beg end))) |
| 1207 | ;; Don't let the undo list be truncated before we can even access it. |
| 1208 | (let ((undo-strong-limit (+ (- (max beg end) (min beg end)) 100)) |
| 1209 | (old-list buffer-undo-list) |
| 1210 | tail) |
| 1211 | (delete-region beg end) |
| 1212 | ;; Search back in buffer-undo-list for this string, |
| 1213 | ;; in case a change hook made property changes. |
| 1214 | (setq tail buffer-undo-list) |
| 1215 | (while (not (stringp (car (car tail)))) |
| 1216 | (setq tail (cdr tail))) |
| 1217 | ;; Take the same string recorded for undo |
| 1218 | ;; and put it in the kill-ring. |
| 1219 | (kill-new (car (car tail))))) |
| 1220 | |
| 1221 | (t |
| 1222 | (copy-region-as-kill beg end) |
| 1223 | (delete-region beg end))) |
| 1224 | (setq this-command 'kill-region)) |
| 1225 | |
| 1226 | ;; copy-region-as-kill no longer sets this-command, because it's confusing |
| 1227 | ;; to get two copies of the text when the user accidentally types M-w and |
| 1228 | ;; then corrects it with the intended C-w. |
| 1229 | (defun copy-region-as-kill (beg end) |
| 1230 | "Save the region as if killed, but don't kill it. |
| 1231 | If `interprogram-cut-function' is non-nil, also save the text for a window |
| 1232 | system cut and paste." |
| 1233 | (interactive "r") |
| 1234 | (if (eq last-command 'kill-region) |
| 1235 | (kill-append (buffer-substring beg end) (< end beg)) |
| 1236 | (kill-new (buffer-substring beg end))) |
| 1237 | nil) |
| 1238 | |
| 1239 | (defun kill-ring-save (beg end) |
| 1240 | "Save the region as if killed, but don't kill it. |
| 1241 | This command is similar to `copy-region-as-kill', except that it gives |
| 1242 | visual feedback indicating the extent of the region being copied. |
| 1243 | If `interprogram-cut-function' is non-nil, also save the text for a window |
| 1244 | system cut and paste." |
| 1245 | (interactive "r") |
| 1246 | (copy-region-as-kill beg end) |
| 1247 | (if (interactive-p) |
| 1248 | (let ((other-end (if (= (point) beg) end beg)) |
| 1249 | (opoint (point)) |
| 1250 | ;; Inhibit quitting so we can make a quit here |
| 1251 | ;; look like a C-g typed as a command. |
| 1252 | (inhibit-quit t)) |
| 1253 | (if (pos-visible-in-window-p other-end (selected-window)) |
| 1254 | (progn |
| 1255 | ;; Swap point and mark. |
| 1256 | (set-marker (mark-marker) (point) (current-buffer)) |
| 1257 | (goto-char other-end) |
| 1258 | (sit-for 1) |
| 1259 | ;; Swap back. |
| 1260 | (set-marker (mark-marker) other-end (current-buffer)) |
| 1261 | (goto-char opoint) |
| 1262 | ;; If user quit, deactivate the mark |
| 1263 | ;; as C-g would as a command. |
| 1264 | (and quit-flag mark-active |
| 1265 | (deactivate-mark))) |
| 1266 | (let* ((killed-text (current-kill 0)) |
| 1267 | (message-len (min (length killed-text) 40))) |
| 1268 | (if (= (point) beg) |
| 1269 | ;; Don't say "killed"; that is misleading. |
| 1270 | (message "Saved text until \"%s\"" |
| 1271 | (substring killed-text (- message-len))) |
| 1272 | (message "Saved text from \"%s\"" |
| 1273 | (substring killed-text 0 message-len)))))))) |
| 1274 | |
| 1275 | (defun append-next-kill () |
| 1276 | "Cause following command, if it kills, to append to previous kill." |
| 1277 | (interactive) |
| 1278 | (if (interactive-p) |
| 1279 | (progn |
| 1280 | (setq this-command 'kill-region) |
| 1281 | (message "If the next command is a kill, it will append")) |
| 1282 | (setq last-command 'kill-region))) |
| 1283 | |
| 1284 | (defun yank-pop (arg) |
| 1285 | "Replace just-yanked stretch of killed text with a different stretch. |
| 1286 | This command is allowed only immediately after a `yank' or a `yank-pop'. |
| 1287 | At such a time, the region contains a stretch of reinserted |
| 1288 | previously-killed text. `yank-pop' deletes that text and inserts in its |
| 1289 | place a different stretch of killed text. |
| 1290 | |
| 1291 | With no argument, the previous kill is inserted. |
| 1292 | With argument N, insert the Nth previous kill. |
| 1293 | If N is negative, this is a more recent kill. |
| 1294 | |
| 1295 | The sequence of kills wraps around, so that after the oldest one |
| 1296 | comes the newest one." |
| 1297 | (interactive "*p") |
| 1298 | (if (not (eq last-command 'yank)) |
| 1299 | (error "Previous command was not a yank")) |
| 1300 | (setq this-command 'yank) |
| 1301 | (let ((before (< (point) (mark t)))) |
| 1302 | (delete-region (point) (mark t)) |
| 1303 | (set-marker (mark-marker) (point) (current-buffer)) |
| 1304 | (insert (current-kill arg)) |
| 1305 | (if before |
| 1306 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. |
| 1307 | ;; It is cleaner to avoid activation, even though the command |
| 1308 | ;; loop would deactivate the mark because we inserted text. |
| 1309 | (goto-char (prog1 (mark t) |
| 1310 | (set-marker (mark-marker) (point) (current-buffer)))))) |
| 1311 | nil) |
| 1312 | |
| 1313 | (defun yank (&optional arg) |
| 1314 | "Reinsert the last stretch of killed text. |
| 1315 | More precisely, reinsert the stretch of killed text most recently |
| 1316 | killed OR yanked. Put point at end, and set mark at beginning. |
| 1317 | With just C-u as argument, same but put point at beginning (and mark at end). |
| 1318 | With argument N, reinsert the Nth most recently killed stretch of killed |
| 1319 | text. |
| 1320 | See also the command \\[yank-pop]." |
| 1321 | (interactive "*P") |
| 1322 | ;; If we don't get all the way thru, make last-command indicate that |
| 1323 | ;; for the following command. |
| 1324 | (setq this-command t) |
| 1325 | (push-mark (point)) |
| 1326 | (insert (current-kill (cond |
| 1327 | ((listp arg) 0) |
| 1328 | ((eq arg '-) -1) |
| 1329 | (t (1- arg))))) |
| 1330 | (if (consp arg) |
| 1331 | ;; This is like exchange-point-and-mark, but doesn't activate the mark. |
| 1332 | ;; It is cleaner to avoid activation, even though the command |
| 1333 | ;; loop would deactivate the mark because we inserted text. |
| 1334 | (goto-char (prog1 (mark t) |
| 1335 | (set-marker (mark-marker) (point) (current-buffer))))) |
| 1336 | ;; If we do get all the way thru, make this-command indicate that. |
| 1337 | (setq this-command 'yank) |
| 1338 | nil) |
| 1339 | |
| 1340 | (defun rotate-yank-pointer (arg) |
| 1341 | "Rotate the yanking point in the kill ring. |
| 1342 | With argument, rotate that many kills forward (or backward, if negative)." |
| 1343 | (interactive "p") |
| 1344 | (current-kill arg)) |
| 1345 | |
| 1346 | \f |
| 1347 | (defun insert-buffer (buffer) |
| 1348 | "Insert after point the contents of BUFFER. |
| 1349 | Puts mark after the inserted text. |
| 1350 | BUFFER may be a buffer or a buffer name." |
| 1351 | (interactive (list (progn (barf-if-buffer-read-only) |
| 1352 | (read-buffer "Insert buffer: " |
| 1353 | (other-buffer (current-buffer) t) |
| 1354 | t)))) |
| 1355 | (or (bufferp buffer) |
| 1356 | (setq buffer (get-buffer buffer))) |
| 1357 | (let (start end newmark) |
| 1358 | (save-excursion |
| 1359 | (save-excursion |
| 1360 | (set-buffer buffer) |
| 1361 | (setq start (point-min) end (point-max))) |
| 1362 | (insert-buffer-substring buffer start end) |
| 1363 | (setq newmark (point))) |
| 1364 | (push-mark newmark)) |
| 1365 | nil) |
| 1366 | |
| 1367 | (defun append-to-buffer (buffer start end) |
| 1368 | "Append to specified buffer the text of the region. |
| 1369 | It is inserted into that buffer before its point. |
| 1370 | |
| 1371 | When calling from a program, give three arguments: |
| 1372 | BUFFER (or buffer name), START and END. |
| 1373 | START and END specify the portion of the current buffer to be copied." |
| 1374 | (interactive |
| 1375 | (list (read-buffer "Append to buffer: " (other-buffer (current-buffer) t)) |
| 1376 | (region-beginning) (region-end))) |
| 1377 | (let ((oldbuf (current-buffer))) |
| 1378 | (save-excursion |
| 1379 | (set-buffer (get-buffer-create buffer)) |
| 1380 | (insert-buffer-substring oldbuf start end)))) |
| 1381 | |
| 1382 | (defun prepend-to-buffer (buffer start end) |
| 1383 | "Prepend to specified buffer the text of the region. |
| 1384 | It is inserted into that buffer after its point. |
| 1385 | |
| 1386 | When calling from a program, give three arguments: |
| 1387 | BUFFER (or buffer name), START and END. |
| 1388 | START and END specify the portion of the current buffer to be copied." |
| 1389 | (interactive "BPrepend to buffer: \nr") |
| 1390 | (let ((oldbuf (current-buffer))) |
| 1391 | (save-excursion |
| 1392 | (set-buffer (get-buffer-create buffer)) |
| 1393 | (save-excursion |
| 1394 | (insert-buffer-substring oldbuf start end))))) |
| 1395 | |
| 1396 | (defun copy-to-buffer (buffer start end) |
| 1397 | "Copy to specified buffer the text of the region. |
| 1398 | It is inserted into that buffer, replacing existing text there. |
| 1399 | |
| 1400 | When calling from a program, give three arguments: |
| 1401 | BUFFER (or buffer name), START and END. |
| 1402 | START and END specify the portion of the current buffer to be copied." |
| 1403 | (interactive "BCopy to buffer: \nr") |
| 1404 | (let ((oldbuf (current-buffer))) |
| 1405 | (save-excursion |
| 1406 | (set-buffer (get-buffer-create buffer)) |
| 1407 | (erase-buffer) |
| 1408 | (save-excursion |
| 1409 | (insert-buffer-substring oldbuf start end))))) |
| 1410 | \f |
| 1411 | (put 'mark-inactive 'error-conditions '(mark-inactive error)) |
| 1412 | (put 'mark-inactive 'error-message "The mark is not active now") |
| 1413 | |
| 1414 | (defun mark (&optional force) |
| 1415 | "Return this buffer's mark value as integer; error if mark inactive. |
| 1416 | If optional argument FORCE is non-nil, access the mark value |
| 1417 | even if the mark is not currently active, and return nil |
| 1418 | if there is no mark at all. |
| 1419 | |
| 1420 | If you are using this in an editing command, you are most likely making |
| 1421 | a mistake; see the documentation of `set-mark'." |
| 1422 | (if (or force (not transient-mark-mode) mark-active mark-even-if-inactive) |
| 1423 | (marker-position (mark-marker)) |
| 1424 | (signal 'mark-inactive nil))) |
| 1425 | |
| 1426 | ;; Many places set mark-active directly, and several of them failed to also |
| 1427 | ;; run deactivate-mark-hook. This shorthand should simplify. |
| 1428 | (defsubst deactivate-mark () |
| 1429 | "Deactivate the mark by setting `mark-active' to nil. |
| 1430 | \(That makes a difference only in Transient Mark mode.) |
| 1431 | Also runs the hook `deactivate-mark-hook'." |
| 1432 | (if transient-mark-mode |
| 1433 | (progn |
| 1434 | (setq mark-active nil) |
| 1435 | (run-hooks 'deactivate-mark-hook)))) |
| 1436 | |
| 1437 | (defun set-mark (pos) |
| 1438 | "Set this buffer's mark to POS. Don't use this function! |
| 1439 | That is to say, don't use this function unless you want |
| 1440 | the user to see that the mark has moved, and you want the previous |
| 1441 | mark position to be lost. |
| 1442 | |
| 1443 | Normally, when a new mark is set, the old one should go on the stack. |
| 1444 | This is why most applications should use push-mark, not set-mark. |
| 1445 | |
| 1446 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
| 1447 | purposes. The mark saves a location for the user's convenience. |
| 1448 | Most editing commands should not alter the mark. |
| 1449 | To remember a location for internal use in the Lisp program, |
| 1450 | store it in a Lisp variable. Example: |
| 1451 | |
| 1452 | (let ((beg (point))) (forward-line 1) (delete-region beg (point)))." |
| 1453 | |
| 1454 | (if pos |
| 1455 | (progn |
| 1456 | (setq mark-active t) |
| 1457 | (run-hooks 'activate-mark-hook) |
| 1458 | (set-marker (mark-marker) pos (current-buffer))) |
| 1459 | ;; Normally we never clear mark-active except in Transient Mark mode. |
| 1460 | ;; But when we actually clear out the mark value too, |
| 1461 | ;; we must clear mark-active in any mode. |
| 1462 | (setq mark-active nil) |
| 1463 | (run-hooks 'deactivate-mark-hook) |
| 1464 | (set-marker (mark-marker) nil))) |
| 1465 | |
| 1466 | (defvar mark-ring nil |
| 1467 | "The list of former marks of the current buffer, most recent first.") |
| 1468 | (make-variable-buffer-local 'mark-ring) |
| 1469 | (put 'mark-ring 'permanent-local t) |
| 1470 | |
| 1471 | (defconst mark-ring-max 16 |
| 1472 | "*Maximum size of mark ring. Start discarding off end if gets this big.") |
| 1473 | |
| 1474 | (defvar global-mark-ring nil |
| 1475 | "The list of saved global marks, most recent first.") |
| 1476 | |
| 1477 | (defconst global-mark-ring-max 16 |
| 1478 | "*Maximum size of global mark ring. \ |
| 1479 | Start discarding off end if gets this big.") |
| 1480 | |
| 1481 | (defun set-mark-command (arg) |
| 1482 | "Set mark at where point is, or jump to mark. |
| 1483 | With no prefix argument, set mark, push old mark position on local mark |
| 1484 | ring, and push mark on global mark ring. |
| 1485 | With argument, jump to mark, and pop a new position for mark off the ring |
| 1486 | \(does not affect global mark ring\). |
| 1487 | |
| 1488 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
| 1489 | purposes. See the documentation of `set-mark' for more information." |
| 1490 | (interactive "P") |
| 1491 | (if (null arg) |
| 1492 | (progn |
| 1493 | (push-mark nil nil t)) |
| 1494 | (if (null (mark t)) |
| 1495 | (error "No mark set in this buffer") |
| 1496 | (goto-char (mark t)) |
| 1497 | (pop-mark)))) |
| 1498 | |
| 1499 | (defun push-mark (&optional location nomsg activate) |
| 1500 | "Set mark at LOCATION (point, by default) and push old mark on mark ring. |
| 1501 | If the last global mark pushed was not in the current buffer, |
| 1502 | also push LOCATION on the global mark ring. |
| 1503 | Display `Mark set' unless the optional second arg NOMSG is non-nil. |
| 1504 | In Transient Mark mode, activate mark if optional third arg ACTIVATE non-nil. |
| 1505 | |
| 1506 | Novice Emacs Lisp programmers often try to use the mark for the wrong |
| 1507 | purposes. See the documentation of `set-mark' for more information. |
| 1508 | |
| 1509 | In Transient Mark mode, this does not activate the mark." |
| 1510 | (if (null (mark t)) |
| 1511 | nil |
| 1512 | (setq mark-ring (cons (copy-marker (mark-marker)) mark-ring)) |
| 1513 | (if (> (length mark-ring) mark-ring-max) |
| 1514 | (progn |
| 1515 | (move-marker (car (nthcdr mark-ring-max mark-ring)) nil) |
| 1516 | (setcdr (nthcdr (1- mark-ring-max) mark-ring) nil)))) |
| 1517 | (set-marker (mark-marker) (or location (point)) (current-buffer)) |
| 1518 | ;; Now push the mark on the global mark ring. |
| 1519 | (if (and global-mark-ring |
| 1520 | (eq (marker-buffer (car global-mark-ring)) (current-buffer))) |
| 1521 | ;; The last global mark pushed was in this same buffer. |
| 1522 | ;; Don't push another one. |
| 1523 | nil |
| 1524 | (setq global-mark-ring (cons (copy-marker (mark-marker)) global-mark-ring)) |
| 1525 | (if (> (length global-mark-ring) global-mark-ring-max) |
| 1526 | (progn |
| 1527 | (move-marker (car (nthcdr global-mark-ring-max global-mark-ring)) |
| 1528 | nil) |
| 1529 | (setcdr (nthcdr (1- global-mark-ring-max) global-mark-ring) nil)))) |
| 1530 | (or nomsg executing-macro (> (minibuffer-depth) 0) |
| 1531 | (message "Mark set")) |
| 1532 | (if (or activate (not transient-mark-mode)) |
| 1533 | (set-mark (mark t))) |
| 1534 | nil) |
| 1535 | |
| 1536 | (defun pop-mark () |
| 1537 | "Pop off mark ring into the buffer's actual mark. |
| 1538 | Does not set point. Does nothing if mark ring is empty." |
| 1539 | (if mark-ring |
| 1540 | (progn |
| 1541 | (setq mark-ring (nconc mark-ring (list (copy-marker (mark-marker))))) |
| 1542 | (set-marker (mark-marker) (+ 0 (car mark-ring)) (current-buffer)) |
| 1543 | (deactivate-mark) |
| 1544 | (move-marker (car mark-ring) nil) |
| 1545 | (if (null (mark t)) (ding)) |
| 1546 | (setq mark-ring (cdr mark-ring))))) |
| 1547 | |
| 1548 | (define-function 'exchange-dot-and-mark 'exchange-point-and-mark) |
| 1549 | (defun exchange-point-and-mark () |
| 1550 | "Put the mark where point is now, and point where the mark is now. |
| 1551 | This command works even when the mark is not active, |
| 1552 | and it reactivates the mark." |
| 1553 | (interactive nil) |
| 1554 | (let ((omark (mark t))) |
| 1555 | (if (null omark) |
| 1556 | (error "No mark set in this buffer")) |
| 1557 | (set-mark (point)) |
| 1558 | (goto-char omark) |
| 1559 | nil)) |
| 1560 | |
| 1561 | (defun transient-mark-mode (arg) |
| 1562 | "Toggle Transient Mark mode. |
| 1563 | With arg, turn Transient Mark mode on if arg is positive, off otherwise. |
| 1564 | |
| 1565 | In Transient Mark mode, when the mark is active, the region is highlighted. |
| 1566 | Changing the buffer \"deactivates\" the mark. |
| 1567 | So do certain other operations that set the mark |
| 1568 | but whose main purpose is something else--for example, |
| 1569 | incremental search, \\[beginning-of-buffer], and \\[end-of-buffer]." |
| 1570 | (interactive "P") |
| 1571 | (setq transient-mark-mode |
| 1572 | (if (null arg) |
| 1573 | (not transient-mark-mode) |
| 1574 | (> (prefix-numeric-value arg) 0)))) |
| 1575 | |
| 1576 | (defun pop-global-mark () |
| 1577 | "Pop off global mark ring and jump to the top location." |
| 1578 | (interactive) |
| 1579 | ;; Pop entries which refer to non-existent buffers. |
| 1580 | (while (and global-mark-ring (not (marker-buffer (car global-mark-ring)))) |
| 1581 | (setq global-mark-ring (cdr global-mark-ring))) |
| 1582 | (or global-mark-ring |
| 1583 | (error "No global mark set")) |
| 1584 | (let* ((marker (car global-mark-ring)) |
| 1585 | (buffer (marker-buffer marker)) |
| 1586 | (position (marker-position marker))) |
| 1587 | (setq global-mark-ring (nconc (cdr global-mark-ring) |
| 1588 | (list (car global-mark-ring)))) |
| 1589 | (set-buffer buffer) |
| 1590 | (or (and (>= position (point-min)) |
| 1591 | (<= position (point-max))) |
| 1592 | (widen)) |
| 1593 | (goto-char position) |
| 1594 | (switch-to-buffer buffer))) |
| 1595 | \f |
| 1596 | (defvar next-line-add-newlines t |
| 1597 | "*If non-nil, `next-line' inserts newline to avoid `end of buffer' error.") |
| 1598 | |
| 1599 | (defun next-line (arg) |
| 1600 | "Move cursor vertically down ARG lines. |
| 1601 | If there is no character in the target line exactly under the current column, |
| 1602 | the cursor is positioned after the character in that line which spans this |
| 1603 | column, or at the end of the line if it is not long enough. |
| 1604 | If there is no line in the buffer after this one, behavior depends on the |
| 1605 | value of `next-line-add-newlines'. If non-nil, it inserts a newline character |
| 1606 | to create a line, and moves the cursor to that line. Otherwise it moves the |
| 1607 | cursor to the end of the buffer. |
| 1608 | |
| 1609 | The command \\[set-goal-column] can be used to create |
| 1610 | a semipermanent goal column to which this command always moves. |
| 1611 | Then it does not try to move vertically. This goal column is stored |
| 1612 | in `goal-column', which is nil when there is none. |
| 1613 | |
| 1614 | If you are thinking of using this in a Lisp program, consider |
| 1615 | using `forward-line' instead. It is usually easier to use |
| 1616 | and more reliable (no dependence on goal column, etc.)." |
| 1617 | (interactive "p") |
| 1618 | (if (and next-line-add-newlines (= arg 1)) |
| 1619 | (let ((opoint (point))) |
| 1620 | (end-of-line) |
| 1621 | (if (eobp) |
| 1622 | (newline 1) |
| 1623 | (goto-char opoint) |
| 1624 | (line-move arg))) |
| 1625 | (if (interactive-p) |
| 1626 | (condition-case nil |
| 1627 | (line-move arg) |
| 1628 | ((beginning-of-buffer end-of-buffer) (ding))) |
| 1629 | (line-move arg))) |
| 1630 | nil) |
| 1631 | |
| 1632 | (defun previous-line (arg) |
| 1633 | "Move cursor vertically up ARG lines. |
| 1634 | If there is no character in the target line exactly over the current column, |
| 1635 | the cursor is positioned after the character in that line which spans this |
| 1636 | column, or at the end of the line if it is not long enough. |
| 1637 | |
| 1638 | The command \\[set-goal-column] can be used to create |
| 1639 | a semipermanent goal column to which this command always moves. |
| 1640 | Then it does not try to move vertically. |
| 1641 | |
| 1642 | If you are thinking of using this in a Lisp program, consider using |
| 1643 | `forward-line' with a negative argument instead. It is usually easier |
| 1644 | to use and more reliable (no dependence on goal column, etc.)." |
| 1645 | (interactive "p") |
| 1646 | (if (interactive-p) |
| 1647 | (condition-case nil |
| 1648 | (line-move (- arg)) |
| 1649 | ((beginning-of-buffer end-of-buffer) (ding))) |
| 1650 | (line-move (- arg))) |
| 1651 | nil) |
| 1652 | |
| 1653 | (defconst track-eol nil |
| 1654 | "*Non-nil means vertical motion starting at end of line keeps to ends of lines. |
| 1655 | This means moving to the end of each line moved onto. |
| 1656 | The beginning of a blank line does not count as the end of a line.") |
| 1657 | |
| 1658 | (defvar goal-column nil |
| 1659 | "*Semipermanent goal column for vertical motion, as set by \\[set-goal-column], or nil.") |
| 1660 | (make-variable-buffer-local 'goal-column) |
| 1661 | |
| 1662 | (defvar temporary-goal-column 0 |
| 1663 | "Current goal column for vertical motion. |
| 1664 | It is the column where point was |
| 1665 | at the start of current run of vertical motion commands. |
| 1666 | When the `track-eol' feature is doing its job, the value is 9999.") |
| 1667 | |
| 1668 | (defvar line-move-ignore-invisible nil |
| 1669 | "*Non-nil means \\[next-line] and \\[previous-line] ignore invisible lines. |
| 1670 | Outline mode sets this.") |
| 1671 | |
| 1672 | ;; This is the guts of next-line and previous-line. |
| 1673 | ;; Arg says how many lines to move. |
| 1674 | (defun line-move (arg) |
| 1675 | ;; Don't run any point-motion hooks, and disregard intangibility, |
| 1676 | ;; for intermediate positions. |
| 1677 | (let ((inhibit-point-motion-hooks t) |
| 1678 | (opoint (point)) |
| 1679 | new) |
| 1680 | (unwind-protect |
| 1681 | (progn |
| 1682 | (if (not (or (eq last-command 'next-line) |
| 1683 | (eq last-command 'previous-line))) |
| 1684 | (setq temporary-goal-column |
| 1685 | (if (and track-eol (eolp) |
| 1686 | ;; Don't count beg of empty line as end of line |
| 1687 | ;; unless we just did explicit end-of-line. |
| 1688 | (or (not (bolp)) (eq last-command 'end-of-line))) |
| 1689 | 9999 |
| 1690 | (current-column)))) |
| 1691 | (if (and (not (integerp selective-display)) |
| 1692 | (not line-move-ignore-invisible)) |
| 1693 | ;; Use just newline characters. |
| 1694 | (or (if (> arg 0) |
| 1695 | (progn (if (> arg 1) (forward-line (1- arg))) |
| 1696 | ;; This way of moving forward ARG lines |
| 1697 | ;; verifies that we have a newline after the last one. |
| 1698 | ;; It doesn't get confused by intangible text. |
| 1699 | (end-of-line) |
| 1700 | (zerop (forward-line 1))) |
| 1701 | (and (zerop (forward-line arg)) |
| 1702 | (bolp))) |
| 1703 | (signal (if (< arg 0) |
| 1704 | 'beginning-of-buffer |
| 1705 | 'end-of-buffer) |
| 1706 | nil)) |
| 1707 | ;; Move by arg lines, but ignore invisible ones. |
| 1708 | (while (> arg 0) |
| 1709 | (end-of-line) |
| 1710 | (and (zerop (vertical-motion 1)) |
| 1711 | (signal 'end-of-buffer nil)) |
| 1712 | ;; If the following character is currently invisible, |
| 1713 | ;; skip all characters with that same `invisible' property value. |
| 1714 | (while (and (not (eobp)) |
| 1715 | (let ((prop |
| 1716 | (get-char-property (point) 'invisible))) |
| 1717 | (if (eq buffer-invisibility-spec t) |
| 1718 | prop |
| 1719 | (or (memq prop buffer-invisibility-spec) |
| 1720 | (assq prop buffer-invisibility-spec))))) |
| 1721 | (if (get-text-property (point) 'invisible) |
| 1722 | (goto-char (next-single-property-change (point) 'invisible)) |
| 1723 | (goto-char (next-overlay-change (point))))) |
| 1724 | (setq arg (1- arg))) |
| 1725 | (while (< arg 0) |
| 1726 | (beginning-of-line) |
| 1727 | (and (zerop (vertical-motion -1)) |
| 1728 | (signal 'beginning-of-buffer nil)) |
| 1729 | (while (and (not (bobp)) |
| 1730 | (let ((prop |
| 1731 | (get-char-property (1- (point)) 'invisible))) |
| 1732 | (if (eq buffer-invisibility-spec t) |
| 1733 | prop |
| 1734 | (or (memq prop buffer-invisibility-spec) |
| 1735 | (assq prop buffer-invisibility-spec))))) |
| 1736 | (if (get-text-property (1- (point)) 'invisible) |
| 1737 | (goto-char (previous-single-property-change (point) 'invisible)) |
| 1738 | (goto-char (previous-overlay-change (point))))) |
| 1739 | (setq arg (1+ arg)))) |
| 1740 | (move-to-column (or goal-column temporary-goal-column))) |
| 1741 | ;; Remember where we moved to, go back home, |
| 1742 | ;; then do the motion over again |
| 1743 | ;; in just one step, with intangibility and point-motion hooks |
| 1744 | ;; enabled this time. |
| 1745 | (setq new (point)) |
| 1746 | (goto-char opoint) |
| 1747 | (setq inhibit-point-motion-hooks nil) |
| 1748 | (goto-char new))) |
| 1749 | nil) |
| 1750 | |
| 1751 | ;;; Many people have said they rarely use this feature, and often type |
| 1752 | ;;; it by accident. Maybe it shouldn't even be on a key. |
| 1753 | (put 'set-goal-column 'disabled t) |
| 1754 | |
| 1755 | (defun set-goal-column (arg) |
| 1756 | "Set the current horizontal position as a goal for \\[next-line] and \\[previous-line]. |
| 1757 | Those commands will move to this position in the line moved to |
| 1758 | rather than trying to keep the same horizontal position. |
| 1759 | With a non-nil argument, clears out the goal column |
| 1760 | so that \\[next-line] and \\[previous-line] resume vertical motion. |
| 1761 | The goal column is stored in the variable `goal-column'." |
| 1762 | (interactive "P") |
| 1763 | (if arg |
| 1764 | (progn |
| 1765 | (setq goal-column nil) |
| 1766 | (message "No goal column")) |
| 1767 | (setq goal-column (current-column)) |
| 1768 | (message (substitute-command-keys |
| 1769 | "Goal column %d (use \\[set-goal-column] with an arg to unset it)") |
| 1770 | goal-column)) |
| 1771 | nil) |
| 1772 | \f |
| 1773 | ;;; Partial support for horizontal autoscrolling. Someday, this feature |
| 1774 | ;;; will be built into the C level and all the (hscroll-point-visible) calls |
| 1775 | ;;; will go away. |
| 1776 | |
| 1777 | (defvar hscroll-step 0 |
| 1778 | "*The number of columns to try scrolling a window by when point moves out. |
| 1779 | If that fails to bring point back on frame, point is centered instead. |
| 1780 | If this is zero, point is always centered after it moves off frame.") |
| 1781 | |
| 1782 | (defun hscroll-point-visible () |
| 1783 | "Scrolls the selected window horizontally to make point visible." |
| 1784 | (save-excursion |
| 1785 | (set-buffer (window-buffer)) |
| 1786 | (if (not (or truncate-lines |
| 1787 | (> (window-hscroll) 0) |
| 1788 | (and truncate-partial-width-windows |
| 1789 | (< (window-width) (frame-width))))) |
| 1790 | ;; Point is always visible when lines are wrapped. |
| 1791 | () |
| 1792 | ;; If point is on the invisible part of the line before window-start, |
| 1793 | ;; then hscrolling can't bring it back, so reset window-start first. |
| 1794 | (and (< (point) (window-start)) |
| 1795 | (let ((ws-bol (save-excursion |
| 1796 | (goto-char (window-start)) |
| 1797 | (beginning-of-line) |
| 1798 | (point)))) |
| 1799 | (and (>= (point) ws-bol) |
| 1800 | (set-window-start nil ws-bol)))) |
| 1801 | (let* ((here (hscroll-window-column)) |
| 1802 | (left (min (window-hscroll) 1)) |
| 1803 | (right (1- (window-width)))) |
| 1804 | ;; Allow for the truncation glyph, if we're not exactly at eol. |
| 1805 | (if (not (and (= here right) |
| 1806 | (= (following-char) ?\n))) |
| 1807 | (setq right (1- right))) |
| 1808 | (cond |
| 1809 | ;; If too far away, just recenter. But don't show too much |
| 1810 | ;; white space off the end of the line. |
| 1811 | ((or (< here (- left hscroll-step)) |
| 1812 | (> here (+ right hscroll-step))) |
| 1813 | (let ((eol (save-excursion (end-of-line) (hscroll-window-column)))) |
| 1814 | (scroll-left (min (- here (/ (window-width) 2)) |
| 1815 | (- eol (window-width) -5))))) |
| 1816 | ;; Within range. Scroll by one step (or maybe not at all). |
| 1817 | ((< here left) |
| 1818 | (scroll-right hscroll-step)) |
| 1819 | ((> here right) |
| 1820 | (scroll-left hscroll-step))))))) |
| 1821 | |
| 1822 | ;; This function returns the window's idea of the display column of point, |
| 1823 | ;; assuming that the window is already known to be truncated rather than |
| 1824 | ;; wrapped, and that we've already handled the case where point is on the |
| 1825 | ;; part of the line before window-start. We ignore window-width; if point |
| 1826 | ;; is beyond the right margin, we want to know how far. The return value |
| 1827 | ;; includes the effects of window-hscroll, window-start, and the prompt |
| 1828 | ;; string in the minibuffer. It may be negative due to hscroll. |
| 1829 | (defun hscroll-window-column () |
| 1830 | (let* ((hscroll (window-hscroll)) |
| 1831 | (startpos (save-excursion |
| 1832 | (beginning-of-line) |
| 1833 | (if (= (point) (save-excursion |
| 1834 | (goto-char (window-start)) |
| 1835 | (beginning-of-line) |
| 1836 | (point))) |
| 1837 | (goto-char (window-start))) |
| 1838 | (point))) |
| 1839 | (hpos (+ (if (and (eq (selected-window) (minibuffer-window)) |
| 1840 | (= 1 (window-start)) |
| 1841 | (= startpos (point-min))) |
| 1842 | (minibuffer-prompt-width) |
| 1843 | 0) |
| 1844 | (min 0 (- 1 hscroll)))) |
| 1845 | val) |
| 1846 | (car (cdr (compute-motion startpos (cons hpos 0) |
| 1847 | (point) (cons 0 1) |
| 1848 | 1000000 (cons hscroll 0) nil))))) |
| 1849 | |
| 1850 | |
| 1851 | ;; rms: (1) The definitions of arrow keys should not simply restate |
| 1852 | ;; what keys they are. The arrow keys should run the ordinary commands. |
| 1853 | ;; (2) The arrow keys are just one of many common ways of moving point |
| 1854 | ;; within a line. Real horizontal autoscrolling would be a good feature, |
| 1855 | ;; but supporting it only for arrow keys is too incomplete to be desirable. |
| 1856 | |
| 1857 | ;;;;; Make arrow keys do the right thing for improved terminal support |
| 1858 | ;;;;; When we implement true horizontal autoscrolling, right-arrow and |
| 1859 | ;;;;; left-arrow can lose the (if truncate-lines ...) clause and become |
| 1860 | ;;;;; aliases. These functions are bound to the corresponding keyboard |
| 1861 | ;;;;; events in loaddefs.el. |
| 1862 | |
| 1863 | ;;(defun right-arrow (arg) |
| 1864 | ;; "Move right one character on the screen (with prefix ARG, that many chars). |
| 1865 | ;;Scroll right if needed to keep point horizontally onscreen." |
| 1866 | ;; (interactive "P") |
| 1867 | ;; (forward-char arg) |
| 1868 | ;; (hscroll-point-visible)) |
| 1869 | |
| 1870 | ;;(defun left-arrow (arg) |
| 1871 | ;; "Move left one character on the screen (with prefix ARG, that many chars). |
| 1872 | ;;Scroll left if needed to keep point horizontally onscreen." |
| 1873 | ;; (interactive "P") |
| 1874 | ;; (backward-char arg) |
| 1875 | ;; (hscroll-point-visible)) |
| 1876 | |
| 1877 | (defun scroll-other-window-down (lines) |
| 1878 | "Scroll the \"other window\" down. |
| 1879 | For more details, see the documentation for `scroll-other-window'." |
| 1880 | (interactive "P") |
| 1881 | (scroll-other-window |
| 1882 | ;; Just invert the argument's meaning. |
| 1883 | ;; We can do that without knowing which window it will be. |
| 1884 | (if (eq lines '-) nil |
| 1885 | (if (null lines) '- |
| 1886 | (- (prefix-numeric-value lines)))))) |
| 1887 | (define-key esc-map [?\C-\S-v] 'scroll-other-window-down) |
| 1888 | |
| 1889 | (defun beginning-of-buffer-other-window (arg) |
| 1890 | "Move point to the beginning of the buffer in the other window. |
| 1891 | Leave mark at previous position. |
| 1892 | With arg N, put point N/10 of the way from the true beginning." |
| 1893 | (interactive "P") |
| 1894 | (let ((orig-window (selected-window)) |
| 1895 | (window (other-window-for-scrolling))) |
| 1896 | ;; We use unwind-protect rather than save-window-excursion |
| 1897 | ;; because the latter would preserve the things we want to change. |
| 1898 | (unwind-protect |
| 1899 | (progn |
| 1900 | (select-window window) |
| 1901 | ;; Set point and mark in that window's buffer. |
| 1902 | (beginning-of-buffer arg) |
| 1903 | ;; Set point accordingly. |
| 1904 | (recenter '(t))) |
| 1905 | (select-window orig-window)))) |
| 1906 | |
| 1907 | (defun end-of-buffer-other-window (arg) |
| 1908 | "Move point to the end of the buffer in the other window. |
| 1909 | Leave mark at previous position. |
| 1910 | With arg N, put point N/10 of the way from the true end." |
| 1911 | (interactive "P") |
| 1912 | ;; See beginning-of-buffer-other-window for comments. |
| 1913 | (let ((orig-window (selected-window)) |
| 1914 | (window (other-window-for-scrolling))) |
| 1915 | (unwind-protect |
| 1916 | (progn |
| 1917 | (select-window window) |
| 1918 | (end-of-buffer arg) |
| 1919 | (recenter '(t))) |
| 1920 | (select-window orig-window)))) |
| 1921 | \f |
| 1922 | (defun transpose-chars (arg) |
| 1923 | "Interchange characters around point, moving forward one character. |
| 1924 | With prefix arg ARG, effect is to take character before point |
| 1925 | and drag it forward past ARG other characters (backward if ARG negative). |
| 1926 | If no argument and at end of line, the previous two chars are exchanged." |
| 1927 | (interactive "*P") |
| 1928 | (and (null arg) (eolp) (forward-char -1)) |
| 1929 | (transpose-subr 'forward-char (prefix-numeric-value arg))) |
| 1930 | |
| 1931 | (defun transpose-words (arg) |
| 1932 | "Interchange words around point, leaving point at end of them. |
| 1933 | With prefix arg ARG, effect is to take word before or around point |
| 1934 | and drag it forward past ARG other words (backward if ARG negative). |
| 1935 | If ARG is zero, the words around or after point and around or after mark |
| 1936 | are interchanged." |
| 1937 | (interactive "*p") |
| 1938 | (transpose-subr 'forward-word arg)) |
| 1939 | |
| 1940 | (defun transpose-sexps (arg) |
| 1941 | "Like \\[transpose-words] but applies to sexps. |
| 1942 | Does not work on a sexp that point is in the middle of |
| 1943 | if it is a list or string." |
| 1944 | (interactive "*p") |
| 1945 | (transpose-subr 'forward-sexp arg)) |
| 1946 | |
| 1947 | (defun transpose-lines (arg) |
| 1948 | "Exchange current line and previous line, leaving point after both. |
| 1949 | With argument ARG, takes previous line and moves it past ARG lines. |
| 1950 | With argument 0, interchanges line point is in with line mark is in." |
| 1951 | (interactive "*p") |
| 1952 | (transpose-subr (function |
| 1953 | (lambda (arg) |
| 1954 | (if (= arg 1) |
| 1955 | (progn |
| 1956 | ;; Move forward over a line, |
| 1957 | ;; but create a newline if none exists yet. |
| 1958 | (end-of-line) |
| 1959 | (if (eobp) |
| 1960 | (newline) |
| 1961 | (forward-char 1))) |
| 1962 | (forward-line arg)))) |
| 1963 | arg)) |
| 1964 | |
| 1965 | (defun transpose-subr (mover arg) |
| 1966 | (let (start1 end1 start2 end2) |
| 1967 | (if (= arg 0) |
| 1968 | (progn |
| 1969 | (save-excursion |
| 1970 | (funcall mover 1) |
| 1971 | (setq end2 (point)) |
| 1972 | (funcall mover -1) |
| 1973 | (setq start2 (point)) |
| 1974 | (goto-char (mark)) |
| 1975 | (funcall mover 1) |
| 1976 | (setq end1 (point)) |
| 1977 | (funcall mover -1) |
| 1978 | (setq start1 (point)) |
| 1979 | (transpose-subr-1)) |
| 1980 | (exchange-point-and-mark))) |
| 1981 | (while (> arg 0) |
| 1982 | (funcall mover -1) |
| 1983 | (setq start1 (point)) |
| 1984 | (funcall mover 1) |
| 1985 | (setq end1 (point)) |
| 1986 | (funcall mover 1) |
| 1987 | (setq end2 (point)) |
| 1988 | (funcall mover -1) |
| 1989 | (setq start2 (point)) |
| 1990 | (transpose-subr-1) |
| 1991 | (goto-char end2) |
| 1992 | (setq arg (1- arg))) |
| 1993 | (while (< arg 0) |
| 1994 | (funcall mover -1) |
| 1995 | (setq start2 (point)) |
| 1996 | (funcall mover -1) |
| 1997 | (setq start1 (point)) |
| 1998 | (funcall mover 1) |
| 1999 | (setq end1 (point)) |
| 2000 | (funcall mover 1) |
| 2001 | (setq end2 (point)) |
| 2002 | (transpose-subr-1) |
| 2003 | (setq arg (1+ arg))))) |
| 2004 | |
| 2005 | (defun transpose-subr-1 () |
| 2006 | (if (> (min end1 end2) (max start1 start2)) |
| 2007 | (error "Don't have two things to transpose")) |
| 2008 | (let ((word1 (buffer-substring start1 end1)) |
| 2009 | (word2 (buffer-substring start2 end2))) |
| 2010 | (delete-region start2 end2) |
| 2011 | (goto-char start2) |
| 2012 | (insert word1) |
| 2013 | (goto-char (if (< start1 start2) start1 |
| 2014 | (+ start1 (- (length word1) (length word2))))) |
| 2015 | (delete-char (length word1)) |
| 2016 | (insert word2))) |
| 2017 | \f |
| 2018 | (defconst comment-column 32 |
| 2019 | "*Column to indent right-margin comments to. |
| 2020 | Setting this variable automatically makes it local to the current buffer. |
| 2021 | Each mode establishes a different default value for this variable; you |
| 2022 | can set the value for a particular mode using that mode's hook.") |
| 2023 | (make-variable-buffer-local 'comment-column) |
| 2024 | |
| 2025 | (defconst comment-start nil |
| 2026 | "*String to insert to start a new comment, or nil if no comment syntax.") |
| 2027 | |
| 2028 | (defconst comment-start-skip nil |
| 2029 | "*Regexp to match the start of a comment plus everything up to its body. |
| 2030 | If there are any \\(...\\) pairs, the comment delimiter text is held to begin |
| 2031 | at the place matched by the close of the first pair.") |
| 2032 | |
| 2033 | (defconst comment-end "" |
| 2034 | "*String to insert to end a new comment. |
| 2035 | Should be an empty string if comments are terminated by end-of-line.") |
| 2036 | |
| 2037 | (defconst comment-indent-hook nil |
| 2038 | "Obsolete variable for function to compute desired indentation for a comment. |
| 2039 | This function is called with no args with point at the beginning of |
| 2040 | the comment's starting delimiter.") |
| 2041 | |
| 2042 | (defconst comment-indent-function |
| 2043 | '(lambda () comment-column) |
| 2044 | "Function to compute desired indentation for a comment. |
| 2045 | This function is called with no args with point at the beginning of |
| 2046 | the comment's starting delimiter.") |
| 2047 | |
| 2048 | (defconst block-comment-start nil |
| 2049 | "*String to insert to start a new comment on a line by itself. |
| 2050 | If nil, use `comment-start' instead. |
| 2051 | Note that the regular expression `comment-start-skip' should skip this string |
| 2052 | as well as the `comment-start' string.") |
| 2053 | |
| 2054 | (defconst block-comment-end nil |
| 2055 | "*String to insert to end a new comment on a line by itself. |
| 2056 | Should be an empty string if comments are terminated by end-of-line. |
| 2057 | If nil, use `comment-end' instead.") |
| 2058 | |
| 2059 | (defun indent-for-comment () |
| 2060 | "Indent this line's comment to comment column, or insert an empty comment." |
| 2061 | (interactive "*") |
| 2062 | (let* ((empty (save-excursion (beginning-of-line) |
| 2063 | (looking-at "[ \t]*$"))) |
| 2064 | (starter (or (and empty block-comment-start) comment-start)) |
| 2065 | (ender (or (and empty block-comment-end) comment-end))) |
| 2066 | (if (null starter) |
| 2067 | (error "No comment syntax defined") |
| 2068 | (let* ((eolpos (save-excursion (end-of-line) (point))) |
| 2069 | cpos indent begpos) |
| 2070 | (beginning-of-line) |
| 2071 | (if (re-search-forward comment-start-skip eolpos 'move) |
| 2072 | (progn (setq cpos (point-marker)) |
| 2073 | ;; Find the start of the comment delimiter. |
| 2074 | ;; If there were paren-pairs in comment-start-skip, |
| 2075 | ;; position at the end of the first pair. |
| 2076 | (if (match-end 1) |
| 2077 | (goto-char (match-end 1)) |
| 2078 | ;; If comment-start-skip matched a string with |
| 2079 | ;; internal whitespace (not final whitespace) then |
| 2080 | ;; the delimiter start at the end of that |
| 2081 | ;; whitespace. Otherwise, it starts at the |
| 2082 | ;; beginning of what was matched. |
| 2083 | (skip-syntax-backward " " (match-beginning 0)) |
| 2084 | (skip-syntax-backward "^ " (match-beginning 0))))) |
| 2085 | (setq begpos (point)) |
| 2086 | ;; Compute desired indent. |
| 2087 | (if (= (current-column) |
| 2088 | (setq indent (if comment-indent-hook |
| 2089 | (funcall comment-indent-hook) |
| 2090 | (funcall comment-indent-function)))) |
| 2091 | (goto-char begpos) |
| 2092 | ;; If that's different from current, change it. |
| 2093 | (skip-chars-backward " \t") |
| 2094 | (delete-region (point) begpos) |
| 2095 | (indent-to indent)) |
| 2096 | ;; An existing comment? |
| 2097 | (if cpos |
| 2098 | (progn (goto-char cpos) |
| 2099 | (set-marker cpos nil)) |
| 2100 | ;; No, insert one. |
| 2101 | (insert starter) |
| 2102 | (save-excursion |
| 2103 | (insert ender))))))) |
| 2104 | |
| 2105 | (defun set-comment-column (arg) |
| 2106 | "Set the comment column based on point. |
| 2107 | With no arg, set the comment column to the current column. |
| 2108 | With just minus as arg, kill any comment on this line. |
| 2109 | With any other arg, set comment column to indentation of the previous comment |
| 2110 | and then align or create a comment on this line at that column." |
| 2111 | (interactive "P") |
| 2112 | (if (eq arg '-) |
| 2113 | (kill-comment nil) |
| 2114 | (if arg |
| 2115 | (progn |
| 2116 | (save-excursion |
| 2117 | (beginning-of-line) |
| 2118 | (re-search-backward comment-start-skip) |
| 2119 | (beginning-of-line) |
| 2120 | (re-search-forward comment-start-skip) |
| 2121 | (goto-char (match-beginning 0)) |
| 2122 | (setq comment-column (current-column)) |
| 2123 | (message "Comment column set to %d" comment-column)) |
| 2124 | (indent-for-comment)) |
| 2125 | (setq comment-column (current-column)) |
| 2126 | (message "Comment column set to %d" comment-column)))) |
| 2127 | |
| 2128 | (defun kill-comment (arg) |
| 2129 | "Kill the comment on this line, if any. |
| 2130 | With argument, kill comments on that many lines starting with this one." |
| 2131 | ;; this function loses in a lot of situations. it incorrectly recognises |
| 2132 | ;; comment delimiters sometimes (ergo, inside a string), doesn't work |
| 2133 | ;; with multi-line comments, can kill extra whitespace if comment wasn't |
| 2134 | ;; through end-of-line, et cetera. |
| 2135 | (interactive "P") |
| 2136 | (or comment-start-skip (error "No comment syntax defined")) |
| 2137 | (let ((count (prefix-numeric-value arg)) endc) |
| 2138 | (while (> count 0) |
| 2139 | (save-excursion |
| 2140 | (end-of-line) |
| 2141 | (setq endc (point)) |
| 2142 | (beginning-of-line) |
| 2143 | (and (string< "" comment-end) |
| 2144 | (setq endc |
| 2145 | (progn |
| 2146 | (re-search-forward (regexp-quote comment-end) endc 'move) |
| 2147 | (skip-chars-forward " \t") |
| 2148 | (point)))) |
| 2149 | (beginning-of-line) |
| 2150 | (if (re-search-forward comment-start-skip endc t) |
| 2151 | (progn |
| 2152 | (goto-char (match-beginning 0)) |
| 2153 | (skip-chars-backward " \t") |
| 2154 | (kill-region (point) endc) |
| 2155 | ;; to catch comments a line beginnings |
| 2156 | (indent-according-to-mode)))) |
| 2157 | (if arg (forward-line 1)) |
| 2158 | (setq count (1- count))))) |
| 2159 | |
| 2160 | (defun comment-region (beg end &optional arg) |
| 2161 | "Comment or uncomment each line in the region. |
| 2162 | With just C-u prefix arg, uncomment each line in region. |
| 2163 | Numeric prefix arg ARG means use ARG comment characters. |
| 2164 | If ARG is negative, delete that many comment characters instead. |
| 2165 | Comments are terminated on each line, even for syntax in which newline does |
| 2166 | not end the comment. Blank lines do not get comments." |
| 2167 | ;; if someone wants it to only put a comment-start at the beginning and |
| 2168 | ;; comment-end at the end then typing it, C-x C-x, closing it, C-x C-x |
| 2169 | ;; is easy enough. No option is made here for other than commenting |
| 2170 | ;; every line. |
| 2171 | (interactive "r\nP") |
| 2172 | (or comment-start (error "No comment syntax is defined")) |
| 2173 | (if (> beg end) (let (mid) (setq mid beg beg end end mid))) |
| 2174 | (save-excursion |
| 2175 | (save-restriction |
| 2176 | (let ((cs comment-start) (ce comment-end) |
| 2177 | numarg) |
| 2178 | (if (consp arg) (setq numarg t) |
| 2179 | (setq numarg (prefix-numeric-value arg)) |
| 2180 | ;; For positive arg > 1, replicate the comment delims now, |
| 2181 | ;; then insert the replicated strings just once. |
| 2182 | (while (> numarg 1) |
| 2183 | (setq cs (concat cs comment-start) |
| 2184 | ce (concat ce comment-end)) |
| 2185 | (setq numarg (1- numarg)))) |
| 2186 | ;; Loop over all lines from BEG to END. |
| 2187 | (narrow-to-region beg end) |
| 2188 | (goto-char beg) |
| 2189 | (while (not (eobp)) |
| 2190 | (if (or (eq numarg t) (< numarg 0)) |
| 2191 | (progn |
| 2192 | ;; Delete comment start from beginning of line. |
| 2193 | (if (eq numarg t) |
| 2194 | (while (looking-at (regexp-quote cs)) |
| 2195 | (delete-char (length cs))) |
| 2196 | (let ((count numarg)) |
| 2197 | (while (and (> 1 (setq count (1+ count))) |
| 2198 | (looking-at (regexp-quote cs))) |
| 2199 | (delete-char (length cs))))) |
| 2200 | ;; Delete comment end from end of line. |
| 2201 | (if (string= "" ce) |
| 2202 | nil |
| 2203 | (if (eq numarg t) |
| 2204 | (progn |
| 2205 | (end-of-line) |
| 2206 | ;; This is questionable if comment-end ends in |
| 2207 | ;; whitespace. That is pretty brain-damaged, |
| 2208 | ;; though. |
| 2209 | (skip-chars-backward " \t") |
| 2210 | (if (and (>= (- (point) (point-min)) (length ce)) |
| 2211 | (save-excursion |
| 2212 | (backward-char (length ce)) |
| 2213 | (looking-at (regexp-quote ce)))) |
| 2214 | (delete-char (- (length ce))))) |
| 2215 | (let ((count numarg)) |
| 2216 | (while (> 1 (setq count (1+ count))) |
| 2217 | (end-of-line) |
| 2218 | ;; this is questionable if comment-end ends in whitespace |
| 2219 | ;; that is pretty brain-damaged though |
| 2220 | (skip-chars-backward " \t") |
| 2221 | (save-excursion |
| 2222 | (backward-char (length ce)) |
| 2223 | (if (looking-at (regexp-quote ce)) |
| 2224 | (delete-char (length ce)))))))) |
| 2225 | (forward-line 1)) |
| 2226 | ;; Insert at beginning and at end. |
| 2227 | (if (looking-at "[ \t]*$") () |
| 2228 | (insert cs) |
| 2229 | (if (string= "" ce) () |
| 2230 | (end-of-line) |
| 2231 | (insert ce))) |
| 2232 | (search-forward "\n" nil 'move))))))) |
| 2233 | \f |
| 2234 | (defun backward-word (arg) |
| 2235 | "Move backward until encountering the end of a word. |
| 2236 | With argument, do this that many times. |
| 2237 | In programs, it is faster to call `forward-word' with negative arg." |
| 2238 | (interactive "p") |
| 2239 | (forward-word (- arg))) |
| 2240 | |
| 2241 | (defun mark-word (arg) |
| 2242 | "Set mark arg words away from point." |
| 2243 | (interactive "p") |
| 2244 | (push-mark |
| 2245 | (save-excursion |
| 2246 | (forward-word arg) |
| 2247 | (point)) |
| 2248 | nil t)) |
| 2249 | |
| 2250 | (defun kill-word (arg) |
| 2251 | "Kill characters forward until encountering the end of a word. |
| 2252 | With argument, do this that many times." |
| 2253 | (interactive "p") |
| 2254 | (kill-region (point) (progn (forward-word arg) (point)))) |
| 2255 | |
| 2256 | (defun backward-kill-word (arg) |
| 2257 | "Kill characters backward until encountering the end of a word. |
| 2258 | With argument, do this that many times." |
| 2259 | (interactive "p") |
| 2260 | (kill-word (- arg))) |
| 2261 | |
| 2262 | (defun current-word (&optional strict) |
| 2263 | "Return the word point is on (or a nearby word) as a string. |
| 2264 | If optional arg STRICT is non-nil, return nil unless point is within |
| 2265 | or adjacent to a word." |
| 2266 | (save-excursion |
| 2267 | (let ((oldpoint (point)) (start (point)) (end (point))) |
| 2268 | (skip-syntax-backward "w_") (setq start (point)) |
| 2269 | (goto-char oldpoint) |
| 2270 | (skip-syntax-forward "w_") (setq end (point)) |
| 2271 | (if (and (eq start oldpoint) (eq end oldpoint)) |
| 2272 | ;; Point is neither within nor adjacent to a word. |
| 2273 | (and (not strict) |
| 2274 | (progn |
| 2275 | ;; Look for preceding word in same line. |
| 2276 | (skip-syntax-backward "^w_" |
| 2277 | (save-excursion (beginning-of-line) |
| 2278 | (point))) |
| 2279 | (if (bolp) |
| 2280 | ;; No preceding word in same line. |
| 2281 | ;; Look for following word in same line. |
| 2282 | (progn |
| 2283 | (skip-syntax-forward "^w_" |
| 2284 | (save-excursion (end-of-line) |
| 2285 | (point))) |
| 2286 | (setq start (point)) |
| 2287 | (skip-syntax-forward "w_") |
| 2288 | (setq end (point))) |
| 2289 | (setq end (point)) |
| 2290 | (skip-syntax-backward "w_") |
| 2291 | (setq start (point))) |
| 2292 | (buffer-substring start end))) |
| 2293 | (buffer-substring start end))))) |
| 2294 | \f |
| 2295 | (defconst fill-prefix nil |
| 2296 | "*String for filling to insert at front of new line, or nil for none. |
| 2297 | Setting this variable automatically makes it local to the current buffer.") |
| 2298 | (make-variable-buffer-local 'fill-prefix) |
| 2299 | |
| 2300 | (defconst auto-fill-inhibit-regexp nil |
| 2301 | "*Regexp to match lines which should not be auto-filled.") |
| 2302 | |
| 2303 | (defun do-auto-fill () |
| 2304 | (let (fc justify bol give-up |
| 2305 | (fill-prefix fill-prefix)) |
| 2306 | (if (or (not (setq justify (current-justification))) |
| 2307 | (null (setq fc (current-fill-column))) |
| 2308 | (and (eq justify 'left) |
| 2309 | (<= (current-column) fc)) |
| 2310 | (save-excursion (beginning-of-line) |
| 2311 | (setq bol (point)) |
| 2312 | (and auto-fill-inhibit-regexp |
| 2313 | (looking-at auto-fill-inhibit-regexp)))) |
| 2314 | nil ;; Auto-filling not required |
| 2315 | (if (memq justify '(full center right)) |
| 2316 | (save-excursion (unjustify-current-line))) |
| 2317 | |
| 2318 | ;; Choose a fill-prefix automatically. |
| 2319 | (if (and adaptive-fill-mode |
| 2320 | (or (null fill-prefix) (string= fill-prefix ""))) |
| 2321 | (let (start end temp) |
| 2322 | (save-excursion |
| 2323 | (end-of-line) |
| 2324 | (setq end (point)) |
| 2325 | (beginning-of-line) |
| 2326 | (setq start (point)) |
| 2327 | (move-to-left-margin) |
| 2328 | ;; Don't do it if this line is a paragraph-starter line |
| 2329 | ;; because then the next line will probably also become one. |
| 2330 | ;; In text mode, when the user indents the first line of a |
| 2331 | ;; paragraph, we don't want all the lines to be indented. |
| 2332 | (if (not (looking-at paragraph-start)) |
| 2333 | (cond ((re-search-forward adaptive-fill-regexp end t) |
| 2334 | (setq fill-prefix |
| 2335 | (buffer-substring-no-properties start (point)))) |
| 2336 | ((setq temp (funcall adaptive-fill-function)) |
| 2337 | (setq fill-prefix temp))))))) |
| 2338 | |
| 2339 | (while (and (not give-up) (> (current-column) fc)) |
| 2340 | ;; Determine where to split the line. |
| 2341 | (let ((fill-point |
| 2342 | (let ((opoint (point)) |
| 2343 | bounce |
| 2344 | (first t)) |
| 2345 | (save-excursion |
| 2346 | (move-to-column (1+ fc)) |
| 2347 | ;; Move back to a word boundary. |
| 2348 | (while (or first |
| 2349 | ;; If this is after period and a single space, |
| 2350 | ;; move back once more--we don't want to break |
| 2351 | ;; the line there and make it look like a |
| 2352 | ;; sentence end. |
| 2353 | (and (not (bobp)) |
| 2354 | (not bounce) |
| 2355 | sentence-end-double-space |
| 2356 | (save-excursion (forward-char -1) |
| 2357 | (and (looking-at "\\. ") |
| 2358 | (not (looking-at "\\. ")))))) |
| 2359 | (setq first nil) |
| 2360 | (skip-chars-backward "^ \t\n") |
| 2361 | ;; If we find nowhere on the line to break it, |
| 2362 | ;; break after one word. Set bounce to t |
| 2363 | ;; so we will not keep going in this while loop. |
| 2364 | (if (bolp) |
| 2365 | (progn |
| 2366 | (re-search-forward "[ \t]" opoint t) |
| 2367 | (setq bounce t))) |
| 2368 | (skip-chars-backward " \t")) |
| 2369 | ;; Let fill-point be set to the place where we end up. |
| 2370 | (point))))) |
| 2371 | ;; If that place is not the beginning of the line, |
| 2372 | ;; break the line there. |
| 2373 | (if (save-excursion |
| 2374 | (goto-char fill-point) |
| 2375 | (not (bolp))) |
| 2376 | (let ((prev-column (current-column))) |
| 2377 | ;; If point is at the fill-point, do not `save-excursion'. |
| 2378 | ;; Otherwise, if a comment prefix or fill-prefix is inserted, |
| 2379 | ;; point will end up before it rather than after it. |
| 2380 | (if (save-excursion |
| 2381 | (skip-chars-backward " \t") |
| 2382 | (= (point) fill-point)) |
| 2383 | (indent-new-comment-line t) |
| 2384 | (save-excursion |
| 2385 | (goto-char fill-point) |
| 2386 | (indent-new-comment-line t))) |
| 2387 | ;; Now do justification, if required |
| 2388 | (if (not (eq justify 'left)) |
| 2389 | (save-excursion |
| 2390 | (end-of-line 0) |
| 2391 | (justify-current-line justify nil t))) |
| 2392 | ;; If making the new line didn't reduce the hpos of |
| 2393 | ;; the end of the line, then give up now; |
| 2394 | ;; trying again will not help. |
| 2395 | (if (>= (current-column) prev-column) |
| 2396 | (setq give-up t))) |
| 2397 | ;; No place to break => stop trying. |
| 2398 | (setq give-up t)))) |
| 2399 | ;; justify last line |
| 2400 | (justify-current-line justify t t)))) |
| 2401 | |
| 2402 | (defun auto-fill-mode (&optional arg) |
| 2403 | "Toggle auto-fill mode. |
| 2404 | With arg, turn Auto-Fill mode on if and only if arg is positive. |
| 2405 | In Auto-Fill mode, inserting a space at a column beyond `current-fill-column' |
| 2406 | automatically breaks the line at a previous space." |
| 2407 | (interactive "P") |
| 2408 | (prog1 (setq auto-fill-function |
| 2409 | (if (if (null arg) |
| 2410 | (not auto-fill-function) |
| 2411 | (> (prefix-numeric-value arg) 0)) |
| 2412 | 'do-auto-fill |
| 2413 | nil)) |
| 2414 | (force-mode-line-update))) |
| 2415 | |
| 2416 | ;; This holds a document string used to document auto-fill-mode. |
| 2417 | (defun auto-fill-function () |
| 2418 | "Automatically break line at a previous space, in insertion of text." |
| 2419 | nil) |
| 2420 | |
| 2421 | (defun turn-on-auto-fill () |
| 2422 | "Unconditionally turn on Auto Fill mode." |
| 2423 | (auto-fill-mode 1)) |
| 2424 | |
| 2425 | (defun set-fill-column (arg) |
| 2426 | "Set `fill-column' to current column, or to argument if given. |
| 2427 | The variable `fill-column' has a separate value for each buffer." |
| 2428 | (interactive "P") |
| 2429 | (setq fill-column (if (integerp arg) arg (current-column))) |
| 2430 | (message "fill-column set to %d" fill-column)) |
| 2431 | \f |
| 2432 | (defconst comment-multi-line nil |
| 2433 | "*Non-nil means \\[indent-new-comment-line] should continue same comment |
| 2434 | on new line, with no new terminator or starter. |
| 2435 | This is obsolete because you might as well use \\[newline-and-indent].") |
| 2436 | |
| 2437 | (defun indent-new-comment-line (&optional soft) |
| 2438 | "Break line at point and indent, continuing comment if within one. |
| 2439 | This indents the body of the continued comment |
| 2440 | under the previous comment line. |
| 2441 | |
| 2442 | This command is intended for styles where you write a comment per line, |
| 2443 | starting a new comment (and terminating it if necessary) on each line. |
| 2444 | If you want to continue one comment across several lines, use \\[newline-and-indent]. |
| 2445 | |
| 2446 | If a fill column is specified, it overrides the use of the comment column |
| 2447 | or comment indentation. |
| 2448 | |
| 2449 | The inserted newline is marked hard if `use-hard-newlines' is true, |
| 2450 | unless optional argument SOFT is non-nil." |
| 2451 | (interactive) |
| 2452 | (let (comcol comstart) |
| 2453 | (skip-chars-backward " \t") |
| 2454 | (delete-region (point) |
| 2455 | (progn (skip-chars-forward " \t") |
| 2456 | (point))) |
| 2457 | (if soft (insert-and-inherit ?\n) (newline 1)) |
| 2458 | (if fill-prefix |
| 2459 | (progn |
| 2460 | (indent-to-left-margin) |
| 2461 | (insert-and-inherit fill-prefix)) |
| 2462 | (if (not comment-multi-line) |
| 2463 | (save-excursion |
| 2464 | (if (and comment-start-skip |
| 2465 | (let ((opoint (point))) |
| 2466 | (forward-line -1) |
| 2467 | (re-search-forward comment-start-skip opoint t))) |
| 2468 | ;; The old line is a comment. |
| 2469 | ;; Set WIN to the pos of the comment-start. |
| 2470 | ;; But if the comment is empty, look at preceding lines |
| 2471 | ;; to find one that has a nonempty comment. |
| 2472 | |
| 2473 | ;; If comment-start-skip contains a \(...\) pair, |
| 2474 | ;; the real comment delimiter starts at the end of that pair. |
| 2475 | (let ((win (or (match-end 1) (match-beginning 0)))) |
| 2476 | (while (and (eolp) (not (bobp)) |
| 2477 | (let (opoint) |
| 2478 | (beginning-of-line) |
| 2479 | (setq opoint (point)) |
| 2480 | (forward-line -1) |
| 2481 | (re-search-forward comment-start-skip opoint t))) |
| 2482 | (setq win (or (match-end 1) (match-beginning 0)))) |
| 2483 | ;; Indent this line like what we found. |
| 2484 | (goto-char win) |
| 2485 | (setq comcol (current-column)) |
| 2486 | (setq comstart |
| 2487 | (buffer-substring (point) (match-end 0))))))) |
| 2488 | (if comcol |
| 2489 | (let ((comment-column comcol) |
| 2490 | (comment-start comstart) |
| 2491 | (comment-end comment-end)) |
| 2492 | (and comment-end (not (equal comment-end "")) |
| 2493 | ; (if (not comment-multi-line) |
| 2494 | (progn |
| 2495 | (forward-char -1) |
| 2496 | (insert comment-end) |
| 2497 | (forward-char 1)) |
| 2498 | ; (setq comment-column (+ comment-column (length comment-start)) |
| 2499 | ; comment-start "") |
| 2500 | ; ) |
| 2501 | ) |
| 2502 | (if (not (eolp)) |
| 2503 | (setq comment-end "")) |
| 2504 | (insert-and-inherit ?\n) |
| 2505 | (forward-char -1) |
| 2506 | (indent-for-comment) |
| 2507 | (save-excursion |
| 2508 | ;; Make sure we delete the newline inserted above. |
| 2509 | (end-of-line) |
| 2510 | (delete-char 1))) |
| 2511 | (indent-according-to-mode))))) |
| 2512 | \f |
| 2513 | (defun set-selective-display (arg) |
| 2514 | "Set `selective-display' to ARG; clear it if no arg. |
| 2515 | When the value of `selective-display' is a number > 0, |
| 2516 | lines whose indentation is >= that value are not displayed. |
| 2517 | The variable `selective-display' has a separate value for each buffer." |
| 2518 | (interactive "P") |
| 2519 | (if (eq selective-display t) |
| 2520 | (error "selective-display already in use for marked lines")) |
| 2521 | (let ((current-vpos |
| 2522 | (save-restriction |
| 2523 | (narrow-to-region (point-min) (point)) |
| 2524 | (goto-char (window-start)) |
| 2525 | (vertical-motion (window-height))))) |
| 2526 | (setq selective-display |
| 2527 | (and arg (prefix-numeric-value arg))) |
| 2528 | (recenter current-vpos)) |
| 2529 | (set-window-start (selected-window) (window-start (selected-window))) |
| 2530 | (princ "selective-display set to " t) |
| 2531 | (prin1 selective-display t) |
| 2532 | (princ "." t)) |
| 2533 | |
| 2534 | (defconst overwrite-mode-textual " Ovwrt" |
| 2535 | "The string displayed in the mode line when in overwrite mode.") |
| 2536 | (defconst overwrite-mode-binary " Bin Ovwrt" |
| 2537 | "The string displayed in the mode line when in binary overwrite mode.") |
| 2538 | |
| 2539 | (defun overwrite-mode (arg) |
| 2540 | "Toggle overwrite mode. |
| 2541 | With arg, turn overwrite mode on iff arg is positive. |
| 2542 | In overwrite mode, printing characters typed in replace existing text |
| 2543 | on a one-for-one basis, rather than pushing it to the right. At the |
| 2544 | end of a line, such characters extend the line. Before a tab, |
| 2545 | such characters insert until the tab is filled in. |
| 2546 | \\[quoted-insert] still inserts characters in overwrite mode; this |
| 2547 | is supposed to make it easier to insert characters when necessary." |
| 2548 | (interactive "P") |
| 2549 | (setq overwrite-mode |
| 2550 | (if (if (null arg) (not overwrite-mode) |
| 2551 | (> (prefix-numeric-value arg) 0)) |
| 2552 | 'overwrite-mode-textual)) |
| 2553 | (force-mode-line-update)) |
| 2554 | |
| 2555 | (defun binary-overwrite-mode (arg) |
| 2556 | "Toggle binary overwrite mode. |
| 2557 | With arg, turn binary overwrite mode on iff arg is positive. |
| 2558 | In binary overwrite mode, printing characters typed in replace |
| 2559 | existing text. Newlines are not treated specially, so typing at the |
| 2560 | end of a line joins the line to the next, with the typed character |
| 2561 | between them. Typing before a tab character simply replaces the tab |
| 2562 | with the character typed. |
| 2563 | \\[quoted-insert] replaces the text at the cursor, just as ordinary |
| 2564 | typing characters do. |
| 2565 | |
| 2566 | Note that binary overwrite mode is not its own minor mode; it is a |
| 2567 | specialization of overwrite-mode, entered by setting the |
| 2568 | `overwrite-mode' variable to `overwrite-mode-binary'." |
| 2569 | (interactive "P") |
| 2570 | (setq overwrite-mode |
| 2571 | (if (if (null arg) |
| 2572 | (not (eq overwrite-mode 'overwrite-mode-binary)) |
| 2573 | (> (prefix-numeric-value arg) 0)) |
| 2574 | 'overwrite-mode-binary)) |
| 2575 | (force-mode-line-update)) |
| 2576 | \f |
| 2577 | (defvar line-number-mode t |
| 2578 | "*Non-nil means display line number in mode line.") |
| 2579 | |
| 2580 | (defun line-number-mode (arg) |
| 2581 | "Toggle Line Number mode. |
| 2582 | With arg, turn Line Number mode on iff arg is positive. |
| 2583 | When Line Number mode is enabled, the line number appears |
| 2584 | in the mode line." |
| 2585 | (interactive "P") |
| 2586 | (setq line-number-mode |
| 2587 | (if (null arg) (not line-number-mode) |
| 2588 | (> (prefix-numeric-value arg) 0))) |
| 2589 | (force-mode-line-update)) |
| 2590 | |
| 2591 | (defvar column-number-mode t |
| 2592 | "*Non-nil means display column number in mode line.") |
| 2593 | |
| 2594 | (defun column-number-mode (arg) |
| 2595 | "Toggle Column Number mode. |
| 2596 | With arg, turn Column Number mode on iff arg is positive. |
| 2597 | When Column Number mode is enabled, the column number appears |
| 2598 | in the mode line." |
| 2599 | (interactive "P") |
| 2600 | (setq column-number-mode |
| 2601 | (if (null arg) (not column-number-mode) |
| 2602 | (> (prefix-numeric-value arg) 0))) |
| 2603 | (force-mode-line-update)) |
| 2604 | |
| 2605 | (defvar blink-matching-paren t |
| 2606 | "*Non-nil means show matching open-paren when close-paren is inserted.") |
| 2607 | |
| 2608 | (defconst blink-matching-paren-distance 12000 |
| 2609 | "*If non-nil, is maximum distance to search for matching open-paren.") |
| 2610 | |
| 2611 | (defconst blink-matching-delay 1 |
| 2612 | "*The number of seconds that `blink-matching-open' will delay at a match.") |
| 2613 | |
| 2614 | (defun blink-matching-open () |
| 2615 | "Move cursor momentarily to the beginning of the sexp before point." |
| 2616 | (interactive) |
| 2617 | (and (> (point) (1+ (point-min))) |
| 2618 | blink-matching-paren |
| 2619 | ;; Verify an even number of quoting characters precede the close. |
| 2620 | (= 1 (logand 1 (- (point) |
| 2621 | (save-excursion |
| 2622 | (forward-char -1) |
| 2623 | (skip-syntax-backward "/\\") |
| 2624 | (point))))) |
| 2625 | (let* ((oldpos (point)) |
| 2626 | (blinkpos) |
| 2627 | (mismatch)) |
| 2628 | (save-excursion |
| 2629 | (save-restriction |
| 2630 | (if blink-matching-paren-distance |
| 2631 | (narrow-to-region (max (point-min) |
| 2632 | (- (point) blink-matching-paren-distance)) |
| 2633 | oldpos)) |
| 2634 | (condition-case () |
| 2635 | (setq blinkpos (scan-sexps oldpos -1)) |
| 2636 | (error nil))) |
| 2637 | (and blinkpos (/= (char-syntax (char-after blinkpos)) |
| 2638 | ?\$) |
| 2639 | (setq mismatch |
| 2640 | (/= (char-after (1- oldpos)) |
| 2641 | (matching-paren (char-after blinkpos))))) |
| 2642 | (if mismatch (setq blinkpos nil)) |
| 2643 | (if blinkpos |
| 2644 | (progn |
| 2645 | (goto-char blinkpos) |
| 2646 | (if (pos-visible-in-window-p) |
| 2647 | (sit-for blink-matching-delay) |
| 2648 | (goto-char blinkpos) |
| 2649 | (message |
| 2650 | "Matches %s" |
| 2651 | ;; Show what precedes the open in its line, if anything. |
| 2652 | (if (save-excursion |
| 2653 | (skip-chars-backward " \t") |
| 2654 | (not (bolp))) |
| 2655 | (buffer-substring (progn (beginning-of-line) (point)) |
| 2656 | (1+ blinkpos)) |
| 2657 | ;; Show what follows the open in its line, if anything. |
| 2658 | (if (save-excursion |
| 2659 | (forward-char 1) |
| 2660 | (skip-chars-forward " \t") |
| 2661 | (not (eolp))) |
| 2662 | (buffer-substring blinkpos |
| 2663 | (progn (end-of-line) (point))) |
| 2664 | ;; Otherwise show the previous nonblank line, |
| 2665 | ;; if there is one. |
| 2666 | (if (save-excursion |
| 2667 | (skip-chars-backward "\n \t") |
| 2668 | (not (bobp))) |
| 2669 | (concat |
| 2670 | (buffer-substring (progn |
| 2671 | (skip-chars-backward "\n \t") |
| 2672 | (beginning-of-line) |
| 2673 | (point)) |
| 2674 | (progn (end-of-line) |
| 2675 | (skip-chars-backward " \t") |
| 2676 | (point))) |
| 2677 | ;; Replace the newline and other whitespace with `...'. |
| 2678 | "..." |
| 2679 | (buffer-substring blinkpos (1+ blinkpos))) |
| 2680 | ;; There is nothing to show except the char itself. |
| 2681 | (buffer-substring blinkpos (1+ blinkpos)))))))) |
| 2682 | (cond (mismatch |
| 2683 | (message "Mismatched parentheses")) |
| 2684 | ((not blink-matching-paren-distance) |
| 2685 | (message "Unmatched parenthesis")))))))) |
| 2686 | |
| 2687 | ;Turned off because it makes dbx bomb out. |
| 2688 | (setq blink-paren-function 'blink-matching-open) |
| 2689 | |
| 2690 | ;; This executes C-g typed while Emacs is waiting for a command. |
| 2691 | ;; Quitting out of a program does not go through here; |
| 2692 | ;; that happens in the QUIT macro at the C code level. |
| 2693 | (defun keyboard-quit () |
| 2694 | "Signal a quit condition. |
| 2695 | During execution of Lisp code, this character causes a quit directly. |
| 2696 | At top-level, as an editor command, this simply beeps." |
| 2697 | (interactive) |
| 2698 | (deactivate-mark) |
| 2699 | (signal 'quit nil)) |
| 2700 | |
| 2701 | (define-key global-map "\C-g" 'keyboard-quit) |
| 2702 | |
| 2703 | (defvar buffer-quit-function nil |
| 2704 | "Function to call to \"quit\" the current buffer, or nil if none. |
| 2705 | \\[keyboard-escape-quit] calls this function when its more local actions |
| 2706 | \(such as cancelling a prefix argument, minibuffer or region) do not apply.") |
| 2707 | |
| 2708 | (defun keyboard-escape-quit () |
| 2709 | "Exit the current \"mode\" (in a generalized sense of the word). |
| 2710 | This command can exit an interactive command such as `query-replace', |
| 2711 | can clear out a prefix argument or a region, |
| 2712 | can get out of the minibuffer or other recursive edit, |
| 2713 | cancel the use of the current buffer (for special-purpose buffers), |
| 2714 | or go back to just one window (by deleting all but the selected window)." |
| 2715 | (interactive) |
| 2716 | (cond ((eq last-command 'mode-exited) nil) |
| 2717 | ((> (minibuffer-depth) 0) |
| 2718 | (abort-recursive-edit)) |
| 2719 | (current-prefix-arg |
| 2720 | nil) |
| 2721 | ((and transient-mark-mode |
| 2722 | mark-active) |
| 2723 | (deactivate-mark)) |
| 2724 | (buffer-quit-function |
| 2725 | (funcall buffer-quit-function)) |
| 2726 | ((not (one-window-p t)) |
| 2727 | (delete-other-windows)))) |
| 2728 | |
| 2729 | (define-key global-map "\e\e\e" 'keyboard-escape-quit) |
| 2730 | \f |
| 2731 | (defun set-variable (var val) |
| 2732 | "Set VARIABLE to VALUE. VALUE is a Lisp object. |
| 2733 | When using this interactively, supply a Lisp expression for VALUE. |
| 2734 | If you want VALUE to be a string, you must surround it with doublequotes. |
| 2735 | |
| 2736 | If VARIABLE has a `variable-interactive' property, that is used as if |
| 2737 | it were the arg to `interactive' (which see) to interactively read the value." |
| 2738 | (interactive |
| 2739 | (let* ((var (read-variable "Set variable: ")) |
| 2740 | (minibuffer-help-form |
| 2741 | '(funcall myhelp)) |
| 2742 | (myhelp |
| 2743 | (function |
| 2744 | (lambda () |
| 2745 | (with-output-to-temp-buffer "*Help*" |
| 2746 | (prin1 var) |
| 2747 | (princ "\nDocumentation:\n") |
| 2748 | (princ (substring (documentation-property var 'variable-documentation) |
| 2749 | 1)) |
| 2750 | (if (boundp var) |
| 2751 | (let ((print-length 20)) |
| 2752 | (princ "\n\nCurrent value: ") |
| 2753 | (prin1 (symbol-value var)))) |
| 2754 | (save-excursion |
| 2755 | (set-buffer standard-output) |
| 2756 | (help-mode)) |
| 2757 | nil))))) |
| 2758 | (list var |
| 2759 | (let ((prop (get var 'variable-interactive))) |
| 2760 | (if prop |
| 2761 | ;; Use VAR's `variable-interactive' property |
| 2762 | ;; as an interactive spec for prompting. |
| 2763 | (call-interactively (list 'lambda '(arg) |
| 2764 | (list 'interactive prop) |
| 2765 | 'arg)) |
| 2766 | (eval-minibuffer (format "Set %s to value: " var))))))) |
| 2767 | (set var val)) |
| 2768 | \f |
| 2769 | ;; Define the major mode for lists of completions. |
| 2770 | |
| 2771 | (defvar completion-list-mode-map nil |
| 2772 | "Local map for completion list buffers.") |
| 2773 | (or completion-list-mode-map |
| 2774 | (let ((map (make-sparse-keymap))) |
| 2775 | (define-key map [mouse-2] 'mouse-choose-completion) |
| 2776 | (define-key map [down-mouse-2] nil) |
| 2777 | (define-key map "\C-m" 'choose-completion) |
| 2778 | (define-key map "\e\e\e" 'delete-completion-window) |
| 2779 | (define-key map [left] 'previous-completion) |
| 2780 | (define-key map [right] 'next-completion) |
| 2781 | (setq completion-list-mode-map map))) |
| 2782 | |
| 2783 | ;; Completion mode is suitable only for specially formatted data. |
| 2784 | (put 'completion-list-mode 'mode-class 'special) |
| 2785 | |
| 2786 | (defvar completion-reference-buffer nil |
| 2787 | "Record the buffer that was current when the completion list was requested. |
| 2788 | This is a local variable in the completion list buffer. |
| 2789 | Initial value is nil to avoid some compiler warnings.") |
| 2790 | |
| 2791 | (defvar completion-base-size nil |
| 2792 | "Number of chars at beginning of minibuffer not involved in completion. |
| 2793 | This is a local variable in the completion list buffer |
| 2794 | but it talks about the buffer in `completion-reference-buffer'. |
| 2795 | If this is nil, it means to compare text to determine which part |
| 2796 | of the tail end of the buffer's text is involved in completion.") |
| 2797 | |
| 2798 | (defun delete-completion-window () |
| 2799 | "Delete the completion list window. |
| 2800 | Go to the window from which completion was requested." |
| 2801 | (interactive) |
| 2802 | (let ((buf completion-reference-buffer)) |
| 2803 | (delete-window (selected-window)) |
| 2804 | (if (get-buffer-window buf) |
| 2805 | (select-window (get-buffer-window buf))))) |
| 2806 | |
| 2807 | (defun previous-completion (n) |
| 2808 | "Move to the previous item in the completion list." |
| 2809 | (interactive "p") |
| 2810 | (next-completion (- n))) |
| 2811 | |
| 2812 | (defun next-completion (n) |
| 2813 | "Move to the next item in the completion list. |
| 2814 | WIth prefix argument N, move N items (negative N means move backward)." |
| 2815 | (interactive "p") |
| 2816 | (while (and (> n 0) (not (eobp))) |
| 2817 | (let ((prop (get-text-property (point) 'mouse-face))) |
| 2818 | ;; If in a completion, move to the end of it. |
| 2819 | (if prop |
| 2820 | (goto-char (next-single-property-change (point) 'mouse-face))) |
| 2821 | ;; Move to start of next one. |
| 2822 | (goto-char (next-single-property-change (point) 'mouse-face))) |
| 2823 | (setq n (1- n))) |
| 2824 | (while (and (< n 0) (not (bobp))) |
| 2825 | (let ((prop (get-text-property (1- (point)) 'mouse-face))) |
| 2826 | ;; If in a completion, move to the start of it. |
| 2827 | (if prop |
| 2828 | (goto-char (previous-single-property-change (point) 'mouse-face))) |
| 2829 | ;; Move to end of the previous completion. |
| 2830 | (goto-char (previous-single-property-change (point) 'mouse-face)) |
| 2831 | ;; Move to the start of that one. |
| 2832 | (goto-char (previous-single-property-change (point) 'mouse-face))) |
| 2833 | (setq n (1+ n)))) |
| 2834 | |
| 2835 | (defun choose-completion () |
| 2836 | "Choose the completion that point is in or next to." |
| 2837 | (interactive) |
| 2838 | (let (beg end completion (buffer completion-reference-buffer) |
| 2839 | (base-size completion-base-size)) |
| 2840 | (if (and (not (eobp)) (get-text-property (point) 'mouse-face)) |
| 2841 | (setq end (point) beg (1+ (point)))) |
| 2842 | (if (and (not (bobp)) (get-text-property (1- (point)) 'mouse-face)) |
| 2843 | (setq end (1- (point)) beg (point))) |
| 2844 | (if (null beg) |
| 2845 | (error "No completion here")) |
| 2846 | (setq beg (previous-single-property-change beg 'mouse-face)) |
| 2847 | (setq end (or (next-single-property-change end 'mouse-face) (point-max))) |
| 2848 | (setq completion (buffer-substring beg end)) |
| 2849 | (let ((owindow (selected-window))) |
| 2850 | (if (and (one-window-p t 'selected-frame) |
| 2851 | (window-dedicated-p (selected-window))) |
| 2852 | ;; This is a special buffer's frame |
| 2853 | (iconify-frame (selected-frame)) |
| 2854 | (or (window-dedicated-p (selected-window)) |
| 2855 | (bury-buffer))) |
| 2856 | (select-window owindow)) |
| 2857 | (choose-completion-string completion buffer base-size))) |
| 2858 | |
| 2859 | ;; Delete the longest partial match for STRING |
| 2860 | ;; that can be found before POINT. |
| 2861 | (defun choose-completion-delete-max-match (string) |
| 2862 | (let ((opoint (point)) |
| 2863 | (len (min (length string) |
| 2864 | (- (point) (point-min))))) |
| 2865 | (goto-char (- (point) (length string))) |
| 2866 | (if completion-ignore-case |
| 2867 | (setq string (downcase string))) |
| 2868 | (while (and (> len 0) |
| 2869 | (let ((tail (buffer-substring (point) |
| 2870 | (+ (point) len)))) |
| 2871 | (if completion-ignore-case |
| 2872 | (setq tail (downcase tail))) |
| 2873 | (not (string= tail (substring string 0 len))))) |
| 2874 | (setq len (1- len)) |
| 2875 | (forward-char 1)) |
| 2876 | (delete-char len))) |
| 2877 | |
| 2878 | ;; Switch to BUFFER and insert the completion choice CHOICE. |
| 2879 | ;; BASE-SIZE, if non-nil, says how many characters of BUFFER's text |
| 2880 | ;; to keep. If it is nil, use choose-completion-delete-max-match instead. |
| 2881 | (defun choose-completion-string (choice &optional buffer base-size) |
| 2882 | (let ((buffer (or buffer completion-reference-buffer))) |
| 2883 | ;; If BUFFER is a minibuffer, barf unless it's the currently |
| 2884 | ;; active minibuffer. |
| 2885 | (if (and (string-match "\\` \\*Minibuf-[0-9]+\\*\\'" (buffer-name buffer)) |
| 2886 | (or (not (active-minibuffer-window)) |
| 2887 | (not (equal buffer |
| 2888 | (window-buffer (active-minibuffer-window)))))) |
| 2889 | (error "Minibuffer is not active for completion") |
| 2890 | ;; Insert the completion into the buffer where completion was requested. |
| 2891 | (set-buffer buffer) |
| 2892 | (if base-size |
| 2893 | (delete-region (+ base-size (point-min)) (point)) |
| 2894 | (choose-completion-delete-max-match choice)) |
| 2895 | (insert choice) |
| 2896 | (remove-text-properties (- (point) (length choice)) (point) |
| 2897 | '(mouse-face nil)) |
| 2898 | ;; Update point in the window that BUFFER is showing in. |
| 2899 | (let ((window (get-buffer-window buffer t))) |
| 2900 | (set-window-point window (point))) |
| 2901 | ;; If completing for the minibuffer, exit it with this choice. |
| 2902 | (and (equal buffer (window-buffer (minibuffer-window))) |
| 2903 | minibuffer-completion-table |
| 2904 | (exit-minibuffer))))) |
| 2905 | |
| 2906 | (defun completion-list-mode () |
| 2907 | "Major mode for buffers showing lists of possible completions. |
| 2908 | Type \\<completion-list-mode-map>\\[choose-completion] in the completion list\ |
| 2909 | to select the completion near point. |
| 2910 | Use \\<completion-list-mode-map>\\[mouse-choose-completion] to select one\ |
| 2911 | with the mouse." |
| 2912 | (interactive) |
| 2913 | (kill-all-local-variables) |
| 2914 | (use-local-map completion-list-mode-map) |
| 2915 | (setq mode-name "Completion List") |
| 2916 | (setq major-mode 'completion-list-mode) |
| 2917 | (make-local-variable 'completion-base-size) |
| 2918 | (setq completion-base-size nil) |
| 2919 | (run-hooks 'completion-list-mode-hook)) |
| 2920 | |
| 2921 | (defvar completion-fixup-function nil |
| 2922 | "A function to customize how completions are identified in completion lists. |
| 2923 | `completion-setup-function' calls this function with no arguments |
| 2924 | each time it has found what it thinks is one completion. |
| 2925 | Point is at the end of the completion in the completion list buffer. |
| 2926 | If this function moves point, it can alter the end of that completion.") |
| 2927 | |
| 2928 | ;; This function goes in completion-setup-hook, so that it is called |
| 2929 | ;; after the text of the completion list buffer is written. |
| 2930 | |
| 2931 | (defun completion-setup-function () |
| 2932 | (save-excursion |
| 2933 | (let ((mainbuf (current-buffer))) |
| 2934 | (set-buffer standard-output) |
| 2935 | (completion-list-mode) |
| 2936 | (make-local-variable 'completion-reference-buffer) |
| 2937 | (setq completion-reference-buffer mainbuf) |
| 2938 | ;;; The value 0 is right in most cases, but not for file name completion. |
| 2939 | ;;; so this has to be turned off. |
| 2940 | ;;; (setq completion-base-size 0) |
| 2941 | (goto-char (point-min)) |
| 2942 | (if window-system |
| 2943 | (insert (substitute-command-keys |
| 2944 | "Click \\[mouse-choose-completion] on a completion to select it.\n"))) |
| 2945 | (insert (substitute-command-keys |
| 2946 | "In this buffer, type \\[choose-completion] to \ |
| 2947 | select the completion near point.\n\n")) |
| 2948 | (forward-line 1) |
| 2949 | (while (re-search-forward "[^ \t\n]+\\( [^ \t\n]+\\)*" nil t) |
| 2950 | (let ((beg (match-beginning 0)) |
| 2951 | (end (point))) |
| 2952 | (if completion-fixup-function |
| 2953 | (funcall completion-fixup-function)) |
| 2954 | (put-text-property beg (point) 'mouse-face 'highlight) |
| 2955 | (goto-char end)))))) |
| 2956 | |
| 2957 | (add-hook 'completion-setup-hook 'completion-setup-function) |
| 2958 | |
| 2959 | (define-key minibuffer-local-completion-map [prior] |
| 2960 | 'switch-to-completions) |
| 2961 | (define-key minibuffer-local-must-match-map [prior] |
| 2962 | 'switch-to-completions) |
| 2963 | (define-key minibuffer-local-completion-map "\M-v" |
| 2964 | 'switch-to-completions) |
| 2965 | (define-key minibuffer-local-must-match-map "\M-v" |
| 2966 | 'switch-to-completions) |
| 2967 | |
| 2968 | (defun switch-to-completions () |
| 2969 | "Select the completion list window." |
| 2970 | (interactive) |
| 2971 | ;; Make sure we have a completions window. |
| 2972 | (or (get-buffer-window "*Completions*") |
| 2973 | (minibuffer-completion-help)) |
| 2974 | (select-window (get-buffer-window "*Completions*")) |
| 2975 | (goto-char (point-min)) |
| 2976 | (search-forward "\n\n") |
| 2977 | (forward-line 1)) |
| 2978 | \f |
| 2979 | ;; Support keyboard commands to turn on various modifiers. |
| 2980 | |
| 2981 | ;; These functions -- which are not commands -- each add one modifier |
| 2982 | ;; to the following event. |
| 2983 | |
| 2984 | (defun event-apply-alt-modifier (ignore-prompt) |
| 2985 | (vector (event-apply-modifier (read-event) 'alt 22 "A-"))) |
| 2986 | (defun event-apply-super-modifier (ignore-prompt) |
| 2987 | (vector (event-apply-modifier (read-event) 'super 23 "s-"))) |
| 2988 | (defun event-apply-hyper-modifier (ignore-prompt) |
| 2989 | (vector (event-apply-modifier (read-event) 'hyper 24 "H-"))) |
| 2990 | (defun event-apply-shift-modifier (ignore-prompt) |
| 2991 | (vector (event-apply-modifier (read-event) 'shift 25 "S-"))) |
| 2992 | (defun event-apply-control-modifier (ignore-prompt) |
| 2993 | (vector (event-apply-modifier (read-event) 'control 26 "C-"))) |
| 2994 | (defun event-apply-meta-modifier (ignore-prompt) |
| 2995 | (vector (event-apply-modifier (read-event) 'meta 27 "M-"))) |
| 2996 | |
| 2997 | (defun event-apply-modifier (event symbol lshiftby prefix) |
| 2998 | "Apply a modifier flag to event EVENT. |
| 2999 | SYMBOL is the name of this modifier, as a symbol. |
| 3000 | LSHIFTBY is the numeric value of this modifier, in keyboard events. |
| 3001 | PREFIX is the string that represents this modifier in an event type symbol." |
| 3002 | (if (numberp event) |
| 3003 | (cond ((eq symbol 'control) |
| 3004 | (if (and (<= (downcase event) ?z) |
| 3005 | (>= (downcase event) ?a)) |
| 3006 | (- (downcase event) ?a -1) |
| 3007 | (if (and (<= (downcase event) ?Z) |
| 3008 | (>= (downcase event) ?A)) |
| 3009 | (- (downcase event) ?A -1) |
| 3010 | (logior (lsh 1 lshiftby) event)))) |
| 3011 | ((eq symbol 'shift) |
| 3012 | (if (and (<= (downcase event) ?z) |
| 3013 | (>= (downcase event) ?a)) |
| 3014 | (upcase event) |
| 3015 | (logior (lsh 1 lshiftby) event))) |
| 3016 | (t |
| 3017 | (logior (lsh 1 lshiftby) event))) |
| 3018 | (if (memq symbol (event-modifiers event)) |
| 3019 | event |
| 3020 | (let ((event-type (if (symbolp event) event (car event)))) |
| 3021 | (setq event-type (intern (concat prefix (symbol-name event-type)))) |
| 3022 | (if (symbolp event) |
| 3023 | event-type |
| 3024 | (cons event-type (cdr event))))))) |
| 3025 | |
| 3026 | (define-key function-key-map [?\C-x ?@ ?h] 'event-apply-hyper-modifier) |
| 3027 | (define-key function-key-map [?\C-x ?@ ?s] 'event-apply-super-modifier) |
| 3028 | (define-key function-key-map [?\C-x ?@ ?m] 'event-apply-meta-modifier) |
| 3029 | (define-key function-key-map [?\C-x ?@ ?a] 'event-apply-alt-modifier) |
| 3030 | (define-key function-key-map [?\C-x ?@ ?S] 'event-apply-shift-modifier) |
| 3031 | (define-key function-key-map [?\C-x ?@ ?c] 'event-apply-control-modifier) |
| 3032 | \f |
| 3033 | ;;;; Keypad support. |
| 3034 | |
| 3035 | ;;; Make the keypad keys act like ordinary typing keys. If people add |
| 3036 | ;;; bindings for the function key symbols, then those bindings will |
| 3037 | ;;; override these, so this shouldn't interfere with any existing |
| 3038 | ;;; bindings. |
| 3039 | |
| 3040 | ;; Also tell read-char how to handle these keys. |
| 3041 | (mapcar |
| 3042 | (lambda (keypad-normal) |
| 3043 | (let ((keypad (nth 0 keypad-normal)) |
| 3044 | (normal (nth 1 keypad-normal))) |
| 3045 | (put keypad 'ascii-character normal) |
| 3046 | (define-key function-key-map (vector keypad) (vector normal)))) |
| 3047 | '((kp-0 ?0) (kp-1 ?1) (kp-2 ?2) (kp-3 ?3) (kp-4 ?4) |
| 3048 | (kp-5 ?5) (kp-6 ?6) (kp-7 ?7) (kp-8 ?8) (kp-9 ?9) |
| 3049 | (kp-space ?\ ) |
| 3050 | (kp-tab ?\t) |
| 3051 | (kp-enter ?\r) |
| 3052 | (kp-multiply ?*) |
| 3053 | (kp-add ?+) |
| 3054 | (kp-separator ?,) |
| 3055 | (kp-subtract ?-) |
| 3056 | (kp-decimal ?.) |
| 3057 | (kp-divide ?/) |
| 3058 | (kp-equal ?=))) |
| 3059 | |
| 3060 | ;;; simple.el ends here |