lisp/calc/calc-yank.el

   1 ;;; calc-yank.el --- kill-ring functionality for Calc
   2
   3 ;; Copyright (C) 1990-1993, 2001-2011  Free Software Foundation, Inc.
   4
   5 ;; Author: David Gillespie <daveg@synaptics.com>
   6 ;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is free software: you can redistribute it and/or modify
  11 ;; it under the terms of the GNU General Public License as published by
  12 ;; the Free Software Foundation, either version 3 of the License, or
  13 ;; (at your option) any later version.
  14
  15 ;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;; GNU General Public License for more details.
  19
  20 ;; You should have received a copy of the GNU General Public License
  21 ;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 ;;; Commentary:
  24
  25 ;;; Code:
  26
  27 ;; This file is autoloaded from calc-ext.el.
  28
  29 (require 'calc-ext)
  30 (require 'calc-macs)
  31
  32 ;;; Kill ring commands.
  33
  34 (defun calc-kill (nn &optional no-delete)
  35   (interactive "P")
  36   (if (eq major-mode 'calc-mode)
  37       (calc-wrapper
  38        (calc-force-refresh)
  39        (calc-set-command-flag 'no-align)
  40        (let ((num (max (calc-locate-cursor-element (point)) 1))
  41              (n (prefix-numeric-value nn)))
  42          (if (< n 0)
  43              (progn
  44                (if (eobp)
  45                    (setq num (1- num)))
  46                (setq num (- num n)
  47                      n (- n))))
  48          (calc-check-stack num)
  49          (let ((stuff (calc-top-list n (- num n -1))))
  50            (calc-cursor-stack-index num)
  51            (let ((first (point)))
  52              (calc-cursor-stack-index (- num n))
  53              (if (null nn)
  54                  (backward-char 1))   ; don't include newline for raw C-k
  55              (copy-region-as-kill first (point))
  56              (if (not no-delete)
  57                  (calc-pop-stack n (- num n -1))))
  58            (setq calc-last-kill (cons (car kill-ring) stuff)))))
  59     (kill-line nn)))
  60
  61 (defun calc-force-refresh ()
  62   (if (or calc-executing-macro calc-display-dirty)
  63       (let ((calc-executing-macro nil))
  64         (calc-refresh))))
  65
  66 (defun calc-locate-cursor-element (pt)
  67   (save-excursion
  68     (goto-char (point-max))
  69     (calc-locate-cursor-scan (- calc-stack-top) calc-stack pt)))
  70
  71 (defun calc-locate-cursor-scan (n stack pt)
  72   (if (or (<= (point) pt)
  73           (null stack))
  74       n
  75     (forward-line (- (nth 1 (car stack))))
  76     (calc-locate-cursor-scan (1+ n) (cdr stack) pt)))
  77
  78 (defun calc-kill-region (top bot &optional no-delete)
  79   (interactive "r")
  80   (if (eq major-mode 'calc-mode)
  81       (calc-wrapper
  82        (calc-force-refresh)
  83        (calc-set-command-flag 'no-align)
  84        (let* ((top-num (calc-locate-cursor-element top))
  85               (top-pos (save-excursion
  86                          (calc-cursor-stack-index top-num)
  87                          (point)))
  88               (bot-num (calc-locate-cursor-element (1- bot)))
  89               (bot-pos (save-excursion
  90                          (calc-cursor-stack-index (max 0 (1- bot-num)))
  91                          (point)))
  92               (num (- top-num bot-num -1)))
  93          (copy-region-as-kill top-pos bot-pos)
  94          (setq calc-last-kill (cons (car kill-ring)
  95                                     (calc-top-list num bot-num)))
  96          (if (not no-delete)
  97              (calc-pop-stack num bot-num))))
  98     (if no-delete
  99         (copy-region-as-kill top bot)
 100       (kill-region top bot))))
 101
 102 (defun calc-copy-as-kill (n)
 103   (interactive "P")
 104   (calc-kill n t))
 105
 106 (defun calc-copy-region-as-kill (top bot)
 107   (interactive "r")
 108   (calc-kill-region top bot t))
 109
 110 ;; This function uses calc-last-kill if possible to get an exact result,
 111 ;; otherwise it just parses the yanked string.
 112 ;; Modified to use Emacs 19 extended concept of kill-ring. -- daveg 12/15/96
 113 ;;;###autoload
 114 (defun calc-yank ()
 115   (interactive)
 116   (calc-wrapper
 117    (calc-pop-push-record-list
 118     0 "yank"
 119     (let ((thing (if (fboundp 'current-kill)
 120                      (current-kill 0 t)
 121                    (car kill-ring-yank-pointer))))
 122       (if (eq (car-safe calc-last-kill) thing)
 123           (cdr calc-last-kill)
 124         (if (stringp thing)
 125             (let ((val (math-read-exprs (calc-clean-newlines thing))))
 126               (if (eq (car-safe val) 'error)
 127                   (progn
 128                     (setq val (math-read-exprs thing))
 129                     (if (eq (car-safe val) 'error)
 130                         (error "Bad format in yanked data")
 131                       val))
 132                 val))))))))
 133
 134 ;;; The Calc set- and get-register commands are modified versions of functions
 135 ;;; in register.el
 136
 137 (defvar calc-register-alist nil
 138   "Alist of elements (NAME . (TEXT . CALCVAL)).
 139 NAME is a character (a number).
 140 TEXT and CALCVAL are the TEXT and internal structure of stack entries.")
 141
 142 (defun calc-set-register (register text calcval)
 143   "Set the contents of the Calc register REGISTER to (TEXT . CALCVAL),
 144 as well as set the contents of the Emacs register REGISTER to TEXT."
 145   (set-register register text)
 146   (let ((aelt (assq register calc-register-alist)))
 147     (if aelt
 148         (setcdr aelt (cons text calcval))
 149       (push (cons register (cons text calcval)) calc-register-alist))))
 150
 151 (defun calc-get-register (reg)
 152   "Return the CALCVAL portion of the contents of the Calc register REG,
 153 unless the TEXT portion doesn't match the contents of the Emacs register REG,
 154 in which case either return the contents of the Emacs register (if it is
 155 text) or `nil'."
 156   (let ((cval (cdr (assq reg calc-register-alist)))
 157         (val (cdr (assq reg register-alist))))
 158     (if (stringp val)
 159         (if (and (stringp (car cval))
 160                  (string= (car cval) val))
 161             (cdr cval)
 162           val))))
 163
 164 (defun calc-copy-to-register (register start end &optional delete-flag)
 165   "Copy the lines in the region into register REGISTER.
 166 With prefix arg, delete as well."
 167   (interactive "cCopy to register: \nr\nP")
 168   (if (eq major-mode 'calc-mode)
 169       (let* ((top-num (calc-locate-cursor-element start))
 170              (top-pos (save-excursion
 171                         (calc-cursor-stack-index top-num)
 172                         (point)))
 173              (bot-num (calc-locate-cursor-element (1- end)))
 174              (bot-pos (save-excursion
 175                         (calc-cursor-stack-index (max 0 (1- bot-num)))
 176                         (point)))
 177              (num (- top-num bot-num -1))
 178              (str (buffer-substring top-pos bot-pos)))
 179         (calc-set-register register str (calc-top-list num bot-num))
 180         (if delete-flag
 181             (calc-wrapper
 182              (calc-pop-stack num bot-num))))
 183     (copy-to-register register start end delete-flag)))
 184
 185 (defun calc-insert-register (register)
 186   "Insert the contents of register REGISTER."
 187   (interactive "cInsert register: ")
 188   (if (eq major-mode 'calc-mode)
 189       (let ((val (calc-get-register register)))
 190         (calc-wrapper
 191          (calc-pop-push-record-list
 192           0 "insr"
 193           (if (not val)
 194               (error "Bad format in register data")
 195             (if (consp val)
 196                 val
 197               (let ((nval (math-read-exprs (calc-clean-newlines val))))
 198                 (if (eq (car-safe nval) 'error)
 199                     (progn
 200                       (setq nval (math-read-exprs val))
 201                       (if (eq (car-safe nval) 'error)
 202                           (error "Bad format in register data")
 203                         nval))
 204                   nval)))))))
 205     (insert-register register)))
 206
 207 (defun calc-add-to-register (register start end prepend delete-flag)
 208   "Add the lines in the region to register REGISTER.
 209 If PREPEND is non-nil, add them to the beginning of the register,
 210 otherwise the end.  If DELETE-FLAG is non-nil, also delete the region."
 211   (let* ((top-num (calc-locate-cursor-element start))
 212          (top-pos (save-excursion
 213                     (calc-cursor-stack-index top-num)
 214                     (point)))
 215          (bot-num (calc-locate-cursor-element (1- end)))
 216          (bot-pos (save-excursion
 217                     (calc-cursor-stack-index (max 0 (1- bot-num)))
 218                     (point)))
 219          (num (- top-num bot-num -1))
 220          (str (buffer-substring top-pos bot-pos))
 221          (calcval (calc-top-list num bot-num))
 222          (cval (cdr (assq register calc-register-alist))))
 223     (if (not cval)
 224         (calc-set-register register str calcval)
 225       (if prepend
 226           (calc-set-register
 227            register
 228            (concat str (car cval))
 229            (append calcval (cdr cval)))
 230         (calc-set-register
 231          register
 232          (concat (car cval) str)
 233          (append (cdr cval) calcval))))
 234     (if delete-flag
 235         (calc-wrapper
 236          (calc-pop-stack num bot-num)))))
 237
 238 (defun calc-append-to-register (register start end &optional delete-flag)
 239   "Copy the lines in the region to the end of register REGISTER.
 240 With prefix arg, also delete the region."
 241   (interactive "cAppend to register: \nr\nP")
 242   (if (eq major-mode 'calc-mode)
 243       (calc-add-to-register register start end nil delete-flag)
 244     (append-to-register register start end delete-flag)))
 245
 246 (defun calc-prepend-to-register (register start end &optional delete-flag)
 247   "Copy the lines in the region to the beginning of register REGISTER.
 248 With prefix arg, also delete the region."
 249   (interactive "cPrepend to register: \nr\nP")
 250   (if (eq major-mode 'calc-mode)
 251       (calc-add-to-register register start end t delete-flag)
 252     (prepend-to-register register start end delete-flag)))
 253
 254
 255
 256 (defun calc-clean-newlines (s)
 257   (cond
 258
 259    ;; Omit leading/trailing whitespace
 260    ((or (string-match "\\`[ \n\r]+\\([^\001]*\\)\\'" s)
 261         (string-match "\\`\\([^\001]*\\)[ \n\r]+\\'" s))
 262     (calc-clean-newlines (math-match-substring s 1)))
 263
 264    ;; Convert newlines to commas
 265    ((string-match "\\`\\(.*\\)[\n\r]+\\([^\001]*\\)\\'" s)
 266     (calc-clean-newlines (concat (math-match-substring s 1) ","
 267                                  (math-match-substring s 2))))
 268
 269    (t s)))
 270
 271
 272 (defun calc-do-grab-region (top bot arg)
 273   (when (memq major-mode '(calc-mode calc-trail-mode))
 274     (error "This command works only in a regular text buffer"))
 275   (let* ((from-buffer (current-buffer))
 276          (calc-was-started (get-buffer-window "*Calculator*"))
 277          (single nil)
 278          data vals pos)
 279     (if arg
 280         (if (consp arg)
 281             (setq single t)
 282           (setq arg (prefix-numeric-value arg))
 283           (if (= arg 0)
 284               (setq top (point-at-bol)
 285                     bot (point-at-eol))
 286             (save-excursion
 287               (setq top (point))
 288               (forward-line arg)
 289               (if (> arg 0)
 290                   (setq bot (point))
 291                 (setq bot top
 292                       top (point)))))))
 293     (setq data (buffer-substring top bot))
 294     (calc)
 295     (if single
 296         (setq vals (math-read-expr data))
 297       (setq vals (math-read-expr (concat "[" data "]")))
 298       (and (eq (car-safe vals) 'vec)
 299            (= (length vals) 2)
 300            (eq (car-safe (nth 1 vals)) 'vec)
 301            (setq vals (nth 1 vals))))
 302     (if (eq (car-safe vals) 'error)
 303         (progn
 304           (if calc-was-started
 305               (pop-to-buffer from-buffer)
 306             (calc-quit t)
 307             (switch-to-buffer from-buffer))
 308           (goto-char top)
 309           (forward-char (+ (nth 1 vals) (if single 0 1)))
 310           (error (nth 2 vals))))
 311     (calc-slow-wrapper
 312      (calc-enter-result 0 "grab" vals))))
 313
 314
 315 (defun calc-do-grab-rectangle (top bot arg &optional reduce)
 316   (and (memq major-mode '(calc-mode calc-trail-mode))
 317        (error "This command works only in a regular text buffer"))
 318   (let* ((col1 (save-excursion (goto-char top) (current-column)))
 319          (col2 (save-excursion (goto-char bot) (current-column)))
 320          (from-buffer (current-buffer))
 321          (calc-was-started (get-buffer-window "*Calculator*"))
 322          data mat vals lnum pt pos)
 323     (if (= col1 col2)
 324         (save-excursion
 325           (unless (= col1 0)
 326             (error "Point and mark must be at beginning of line, or define a rectangle"))
 327           (goto-char top)
 328           (while (< (point) bot)
 329             (setq pt (point))
 330             (forward-line 1)
 331             (setq data (cons (buffer-substring pt (1- (point))) data)))
 332           (setq data (nreverse data)))
 333       (setq data (extract-rectangle top bot)))
 334     (calc)
 335     (setq mat (list 'vec)
 336           lnum 0)
 337     (when arg
 338       (setq arg (if (consp arg) 0 (prefix-numeric-value arg))))
 339     (while data
 340       (if (natnump arg)
 341           (progn
 342             (if (= arg 0)
 343                 (setq arg 1000000))
 344             (setq pos 0
 345                   vals (list 'vec))
 346             (let ((w (length (car data)))
 347                   j v)
 348               (while (< pos w)
 349                 (setq j (+ pos arg)
 350                       v (if (>= j w)
 351                             (math-read-expr (substring (car data) pos))
 352                           (math-read-expr (substring (car data) pos j))))
 353                 (if (eq (car-safe v) 'error)
 354                     (setq vals v w 0)
 355                   (setq vals (nconc vals (list v))
 356                         pos j)))))
 357         (if (string-match "\\` *-?[0-9][0-9]?[0-9]?[0-9]?[0-9]?[0-9]? *\\'"
 358                           (car data))
 359             (setq vals (list 'vec (string-to-number (car data))))
 360           (if (and (null arg)
 361                    (string-match "[[{][^][{}]*[]}]" (car data)))
 362               (setq pos (match-beginning 0)
 363                     vals (math-read-expr (math-match-substring (car data) 0)))
 364             (let ((s (if (string-match
 365                           "\\`\\([0-9]+:[ \t]\\)?\\(.*[^, \t]\\)[, \t]*\\'"
 366                           (car data))
 367                          (math-match-substring (car data) 2)
 368                        (car data))))
 369               (setq pos -1
 370                     vals (math-read-expr (concat "[" s "]")))
 371               (if (eq (car-safe vals) 'error)
 372                   (let ((v2 (math-read-expr s)))
 373                     (unless (eq (car-safe v2) 'error)
 374                       (setq vals (list 'vec v2)))))))))
 375       (if (eq (car-safe vals) 'error)
 376           (progn
 377             (if calc-was-started
 378                 (pop-to-buffer from-buffer)
 379               (calc-quit t)
 380               (switch-to-buffer from-buffer))
 381             (goto-char top)
 382             (forward-line lnum)
 383             (forward-char (+ (nth 1 vals) (min col1 col2) pos))
 384             (error (nth 2 vals))))
 385       (unless (equal vals '(vec))
 386         (setq mat (cons vals mat)))
 387       (setq data (cdr data)
 388             lnum (1+ lnum)))
 389     (calc-slow-wrapper
 390      (if reduce
 391          (calc-enter-result 0 "grb+" (list reduce '(var add var-add)
 392                                            (nreverse mat)))
 393        (calc-enter-result 0 "grab" (nreverse mat))))))
 394
 395
 396 (defun calc-copy-to-buffer (nn)
 397   "Copy the top of stack into an editing buffer."
 398   (interactive "P")
 399   (let ((thebuf (and (not (memq major-mode '(calc-mode calc-trail-mode)))
 400                      (current-buffer)))
 401         (movept nil)
 402         oldbuf newbuf)
 403     (calc-wrapper
 404      (save-excursion
 405        (calc-force-refresh)
 406        (let ((n (prefix-numeric-value nn))
 407              (eat-lnums calc-line-numbering)
 408              (big-offset (if (eq calc-language 'big) 1 0))
 409              top bot)
 410          (setq oldbuf (current-buffer)
 411                newbuf (or thebuf
 412                           (calc-find-writable-buffer (buffer-list) 0)
 413                           (calc-find-writable-buffer (buffer-list) 1)
 414                           (error "No other buffer")))
 415          (cond ((and (or (null nn)
 416                          (consp nn))
 417                      (= (calc-substack-height 0)
 418                         (- (1- (calc-substack-height 1)) big-offset)))
 419                 (calc-cursor-stack-index 1)
 420                 (if (looking-at
 421                      (if calc-line-numbering "[0-9]+: *[^ \n]" " *[^ \n]"))
 422                     (goto-char (1- (match-end 0))))
 423                 (setq eat-lnums nil
 424                       top (point))
 425                 (calc-cursor-stack-index 0)
 426                 (setq bot (- (1- (point)) big-offset)))
 427                ((> n 0)
 428                 (calc-cursor-stack-index n)
 429                 (setq top (point))
 430                 (calc-cursor-stack-index 0)
 431                 (setq bot (- (point) big-offset)))
 432                ((< n 0)
 433                 (calc-cursor-stack-index (- n))
 434                 (setq top (point))
 435                 (calc-cursor-stack-index (1- (- n)))
 436                 (setq bot (point)))
 437                (t
 438                 (goto-char (point-min))
 439                 (forward-line 1)
 440                 (setq top (point))
 441                 (calc-cursor-stack-index 0)
 442                 (setq bot (point))))
 443          (with-current-buffer newbuf
 444            (if (consp nn)
 445                (kill-region (region-beginning) (region-end)))
 446            (push-mark (point) t)
 447            (if (and overwrite-mode (not (consp nn)))
 448                (calc-overwrite-string (with-current-buffer oldbuf
 449                                         (buffer-substring top bot))
 450                                       eat-lnums)
 451              (or (bolp) (setq eat-lnums nil))
 452              (insert-buffer-substring oldbuf top bot)
 453              (and eat-lnums
 454                   (let ((n 1))
 455                     (while (and (> (point) (mark))
 456                                 (progn
 457                                   (forward-line -1)
 458                                   (>= (point) (mark))))
 459                       (delete-char 4)
 460                       (setq n (1+ n)))
 461                     (forward-line n))))
 462            (when thebuf
 463              (setq movept (point)))
 464            (when (get-buffer-window (current-buffer))
 465              (set-window-point (get-buffer-window (current-buffer))
 466                                (point)))))))
 467     (when movept
 468       (goto-char movept))
 469     (when (and (consp nn)
 470                (not thebuf))
 471       (calc-quit t)
 472       (switch-to-buffer newbuf))))
 473
 474 (defun calc-overwrite-string (str eat-lnums)
 475   (when (string-match "\n\\'" str)
 476     (setq str (substring str 0 -1)))
 477   (when eat-lnums
 478     (setq str (substring str 4)))
 479   (if (and (string-match "\\`[-+]?[0-9.]+\\(e-?[0-9]+\\)?\\'" str)
 480            (looking-at "[-+]?[0-9.]+\\(e-?[0-9]+\\)?"))
 481       (progn
 482         (delete-region (point) (match-end 0))
 483         (insert str))
 484     (let ((i 0))
 485       (while (< i (length str))
 486         (if (= (setq last-command-event (aref str i)) ?\n)
 487             (or (= i (1- (length str)))
 488                 (let ((pt (point)))
 489                   (end-of-line)
 490                   (delete-region pt (point))
 491                   (if (eobp)
 492                       (insert "\n")
 493                     (forward-char 1))
 494                   (if eat-lnums (setq i (+ i 4)))))
 495           (self-insert-command 1))
 496         (setq i (1+ i))))))
 497
 498 ;; First, require that buffer is visible and does not begin with "*"
 499 ;; Second, require only that it not begin with "*Calc"
 500 (defun calc-find-writable-buffer (buf mode)
 501   (and buf
 502        (if (or (string-match "\\`\\( .*\\|\\*Calc.*\\)"
 503                              (buffer-name (car buf)))
 504                (and (= mode 0)
 505                     (or (string-match "\\`\\*.*" (buffer-name (car buf)))
 506                         (not (get-buffer-window (car buf))))))
 507            (calc-find-writable-buffer (cdr buf) mode)
 508          (car buf))))
 509
 510
 511 (defun calc-edit (n)
 512   (interactive "p")
 513   (calc-slow-wrapper
 514    (when (eq n 0)
 515      (setq n (calc-stack-size)))
 516    (let* ((flag nil)
 517           (allow-ret (> n 1))
 518           (list (math-showing-full-precision
 519                  (mapcar (if (> n 1)
 520                              (function (lambda (x)
 521                                          (math-format-flat-expr x 0)))
 522                            (function
 523                             (lambda (x)
 524                               (if (math-vectorp x) (setq allow-ret t))
 525                               (math-format-nice-expr x (frame-width)))))
 526                          (if (> n 0)
 527                              (calc-top-list n)
 528                            (calc-top-list 1 (- n)))))))
 529      (calc-edit-mode (list 'calc-finish-stack-edit (or flag n)) allow-ret)
 530      (while list
 531        (insert (car list) "\n")
 532        (setq list (cdr list)))))
 533   (calc-show-edit-buffer))
 534
 535 (defun calc-alg-edit (str)
 536   (calc-edit-mode '(calc-finish-stack-edit 0))
 537   (calc-show-edit-buffer)
 538   (insert str "\n")
 539   (backward-char 1)
 540   (calc-set-command-flag 'do-edit))
 541
 542 (defvar calc-edit-mode-map
 543   (let ((map (make-sparse-keymap)))
 544     (define-key map "\n" 'calc-edit-finish)
 545     (define-key map "\r" 'calc-edit-return)
 546     (define-key map "\C-c\C-c" 'calc-edit-finish)
 547     map)
 548   "Keymap for use by the calc-edit command.")
 549
 550 (defvar calc-original-buffer)
 551 (defvar calc-return-buffer)
 552 (defvar calc-one-window)
 553 (defvar calc-edit-handler)
 554 (defvar calc-restore-trail)
 555 (defvar calc-allow-ret)
 556 (defvar calc-edit-top)
 557
 558 (defun calc-edit-mode (&optional handler allow-ret title)
 559   "Calculator editing mode.  Press RET, LFD, or C-c C-c to finish.
 560 To cancel the edit, simply kill the *Calc Edit* buffer."
 561   (interactive)
 562   (unless handler
 563     (error "This command can be used only indirectly through calc-edit"))
 564   (let ((oldbuf (current-buffer))
 565         (buf (get-buffer-create "*Calc Edit*")))
 566     (set-buffer buf)
 567     (kill-all-local-variables)
 568     (use-local-map calc-edit-mode-map)
 569     (setq buffer-read-only nil)
 570     (setq truncate-lines nil)
 571     (setq major-mode 'calc-edit-mode)
 572     (setq mode-name "Calc Edit")
 573     (run-mode-hooks 'calc-edit-mode-hook)
 574     (make-local-variable 'calc-original-buffer)
 575     (setq calc-original-buffer oldbuf)
 576     (make-local-variable 'calc-return-buffer)
 577     (setq calc-return-buffer oldbuf)
 578     (make-local-variable 'calc-one-window)
 579     (setq calc-one-window (and (one-window-p t) pop-up-windows))
 580     (make-local-variable 'calc-edit-handler)
 581     (setq calc-edit-handler handler)
 582     (make-local-variable 'calc-restore-trail)
 583     (setq calc-restore-trail (get-buffer-window (calc-trail-buffer)))
 584     (make-local-variable 'calc-allow-ret)
 585     (setq calc-allow-ret allow-ret)
 586     (let ((inhibit-read-only t))
 587       (erase-buffer))
 588     (add-hook 'kill-buffer-hook (lambda ()
 589                                   (let ((calc-edit-handler nil))
 590                                     (calc-edit-finish t))
 591                                   (message "(Cancelled)")) t t)
 592     (insert (propertize
 593              (concat
 594               (or title title "Calc Edit Mode. ")
 595               "Press `C-c C-c'"
 596               (if allow-ret "" " or RET")
 597               " to finish, `C-x k RET' to cancel.\n\n")
 598              'font-lock-face 'italic 'read-only t 'rear-nonsticky t 'front-sticky t))
 599     (make-local-variable 'calc-edit-top)
 600     (setq calc-edit-top (point))))
 601 (put 'calc-edit-mode 'mode-class 'special)
 602
 603 (defun calc-show-edit-buffer ()
 604   (let ((buf (current-buffer)))
 605     (if (and (one-window-p t) pop-up-windows)
 606         (pop-to-buffer (get-buffer-create "*Calc Edit*"))
 607       (and calc-embedded-info (get-buffer-window (aref calc-embedded-info 1))
 608            (select-window (get-buffer-window (aref calc-embedded-info 1))))
 609       (switch-to-buffer (get-buffer-create "*Calc Edit*")))
 610     (setq calc-return-buffer buf)
 611     (if (and (< (window-width) (frame-width))
 612              calc-display-trail)
 613         (let ((win (get-buffer-window (calc-trail-buffer))))
 614           (if win
 615               (delete-window win))))
 616     (set-buffer-modified-p nil)
 617     (goto-char calc-edit-top)))
 618
 619 (defun calc-edit-return ()
 620   (interactive)
 621   (if (and (boundp 'calc-allow-ret) calc-allow-ret)
 622       (newline)
 623     (calc-edit-finish)))
 624
 625 ;; The variable calc-edit-disp-trail is local to calc-edit finish, but
 626 ;; is used by calc-finish-selection-edit and calc-finish-stack-edit.
 627 (defvar calc-edit-disp-trail)
 628
 629 (defun calc-edit-finish (&optional keep)
 630   "Finish calc-edit mode.  Parse buffer contents and push them on the stack."
 631   (interactive "P")
 632   (message "Working...")
 633   (or (and (boundp 'calc-original-buffer)
 634            (boundp 'calc-return-buffer)
 635            (boundp 'calc-one-window)
 636            (boundp 'calc-edit-handler)
 637            (boundp 'calc-restore-trail)
 638            (eq major-mode 'calc-edit-mode))
 639       (error "This command is valid only in buffers created by calc-edit"))
 640   (let ((buf (current-buffer))
 641         (original calc-original-buffer)
 642         (return calc-return-buffer)
 643         (one-window calc-one-window)
 644         (calc-edit-disp-trail calc-restore-trail))
 645     (save-excursion
 646       (when (or (null (buffer-name original))
 647                 (progn
 648                   (set-buffer original)
 649                   (not (eq major-mode 'calc-mode))))
 650         (error "Original calculator buffer has been corrupted")))
 651     (goto-char calc-edit-top)
 652     (if (buffer-modified-p)
 653         (eval calc-edit-handler))
 654     (if (and one-window (not (one-window-p t)))
 655         (delete-window))
 656     (if (get-buffer-window return)
 657         (select-window (get-buffer-window return))
 658       (switch-to-buffer return))
 659     (if keep
 660         (bury-buffer buf)
 661       (kill-buffer buf))
 662     (if calc-edit-disp-trail
 663         (calc-wrapper
 664          (calc-trail-display 1 t)))
 665     (message "")))
 666
 667 (defun calc-edit-cancel ()
 668   "Cancel calc-edit mode.  Ignore the Calc Edit buffer and don't change stack."
 669   (interactive)
 670   (let ((calc-edit-handler nil))
 671     (calc-edit-finish))
 672   (message "(Cancelled)"))
 673
 674 (defun calc-finish-stack-edit (num)
 675   (let ((buf (current-buffer))
 676         (str (buffer-substring calc-edit-top (point-max)))
 677         (start (point))
 678         pos)
 679     (if (and (integerp num) (> num 1))
 680         (while (setq pos (string-match "\n." str))
 681           (aset str pos ?\,)))
 682     (switch-to-buffer calc-original-buffer)
 683     (let ((vals (let ((calc-language nil)
 684                       (math-expr-opers (math-standard-ops)))
 685                   (and (string-match "[^\n\t ]" str)
 686                        (math-read-exprs str)))))
 687       (when (eq (car-safe vals) 'error)
 688         (switch-to-buffer buf)
 689         (goto-char (+ start (nth 1 vals)))
 690         (error (nth 2 vals)))
 691       (calc-wrapper
 692        (if (symbolp num)
 693            (progn
 694              (set num (car vals))
 695              (calc-refresh-evaltos num))
 696          (if calc-edit-disp-trail
 697              (calc-trail-display 1 t))
 698          (and vals
 699               (let ((calc-simplify-mode (if (eq last-command-event ?\C-j)
 700                                             'none
 701                                           calc-simplify-mode)))
 702                 (if (>= num 0)
 703                     (calc-enter-result num "edit" vals)
 704                   (calc-enter-result 1 "edit" vals (- num))))))))))
 705
 706 (provide 'calc-yank)
 707
 708 ;; Local variables:
 709 ;; generated-autoload-file: "calc-loaddefs.el"
 710 ;; End:
 711
 712 ;;; calc-yank.el ends here