lisp/calc/calc-mode.el

   1 ;;; calc-mode.el --- calculator modes for Calc
   2
   3 ;; Copyright (C) 1990-1993, 2001-2014 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 ;; Declare functions which are defined elsewhere.
  33 (declare-function calc-embedded-save-original-modes "calc-embed" ())
  34
  35
  36 (defun calc-line-numbering (n)
  37   (interactive "P")
  38   (calc-wrapper
  39    (message (if (calc-change-mode 'calc-line-numbering n t t)
  40                 "Displaying stack level numbers"
  41               "Hiding stack level numbers"))))
  42
  43 (defun calc-line-breaking (n)
  44   (interactive "P")
  45   (calc-wrapper
  46    (setq n (if n
  47                (and (> (setq n (prefix-numeric-value n)) 0)
  48                     (or (< n 5)
  49                         n))
  50              (not calc-line-breaking)))
  51    (if (calc-change-mode 'calc-line-breaking n t)
  52        (if (integerp calc-line-breaking)
  53            (message "Breaking lines longer than %d characters" n)
  54          (message "Breaking long lines in Stack display"))
  55      (message "Not breaking long lines in Stack display"))))
  56
  57
  58 (defun calc-left-justify (n)
  59   (interactive "P")
  60   (calc-wrapper
  61    (and n (setq n (prefix-numeric-value n)))
  62    (calc-change-mode '(calc-display-just calc-display-origin)
  63                      (list nil n) t)
  64    (if n
  65        (message "Displaying stack entries indented by %d" n)
  66      (message "Displaying stack entries left-justified"))))
  67
  68 (defun calc-center-justify (n)
  69   (interactive "P")
  70   (calc-wrapper
  71    (and n (setq n (prefix-numeric-value n)))
  72    (calc-change-mode '(calc-display-just calc-display-origin)
  73                      (list 'center n) t)
  74    (if n
  75        (message "Displaying stack entries centered on column %d" n)
  76      (message "Displaying stack entries centered in window"))))
  77
  78 (defun calc-right-justify (n)
  79   (interactive "P")
  80   (calc-wrapper
  81    (and n (setq n (prefix-numeric-value n)))
  82    (calc-change-mode '(calc-display-just calc-display-origin)
  83                      (list 'right n) t)
  84    (if n
  85        (message "Displaying stack entries right-justified to column %d" n)
  86      (message "Displaying stack entries right-justified in window"))))
  87
  88 (defun calc-left-label (s)
  89   (interactive "sLefthand label: ")
  90   (calc-wrapper
  91    (or (equal s "")
  92        (setq s (concat s " ")))
  93    (calc-change-mode 'calc-left-label s t)))
  94
  95 (defun calc-right-label (s)
  96   (interactive "sRighthand label: ")
  97   (calc-wrapper
  98    (or (equal s "")
  99        (setq s (concat " " s)))
 100    (calc-change-mode 'calc-right-label s t)))
 101
 102 (defun calc-auto-why (n)
 103   (interactive "P")
 104   (calc-wrapper
 105    (if n
 106        (progn
 107          (setq n (prefix-numeric-value n))
 108          (if (<= n 0) (setq n nil)
 109            (if (> n 1) (setq n t))))
 110      (setq n (and (not (eq calc-auto-why t)) (if calc-auto-why t 1))))
 111    (calc-change-mode 'calc-auto-why n nil)
 112    (cond ((null n)
 113           (message "User must press `w' to explain unsimplified results"))
 114          ((eq n t)
 115           (message "Automatically doing `w' to explain unsimplified results"))
 116          (t
 117           (message "Automatically doing `w' only for unusual messages")))))
 118
 119 (defun calc-group-digits (n)
 120   (interactive "P")
 121   (calc-wrapper
 122    (if n
 123        (progn
 124          (setq n (prefix-numeric-value n))
 125          (cond ((or (> n 0) (< n -1)))
 126                ((= n -1)
 127                 (setq n nil))
 128                (t
 129                 (setq n calc-group-digits))))
 130      (setq n (not calc-group-digits)))
 131    (calc-change-mode 'calc-group-digits n t)
 132    (cond ((null n)
 133           (message "Grouping is off"))
 134          ((integerp n)
 135           (message "Grouping every %d digits" (math-abs n)))
 136          (t
 137           (message "Grouping is on")))))
 138
 139 (defun calc-group-char (ch)
 140   (interactive "cGrouping character: ")
 141   (calc-wrapper
 142    (or (>= ch 32)
 143        (error "Control characters not allowed for grouping"))
 144    (if (= ch ?\\)
 145        (setq ch "\\,")
 146      (setq ch (char-to-string ch)))
 147    (calc-change-mode 'calc-group-char ch calc-group-digits)
 148    (message "Digit grouping character is \"%s\"" ch)))
 149
 150 (defun calc-point-char (ch)
 151   (interactive "cCharacter to use as decimal point: ")
 152   (calc-wrapper
 153    (or (>= ch 32)
 154        (error "Control characters not allowed as decimal point"))
 155    (calc-change-mode 'calc-point-char (char-to-string ch) t)
 156    (message "Decimal point character is \"%c\"" ch)))
 157
 158 (defun calc-normal-notation (n)
 159   (interactive "P")
 160   (calc-wrapper
 161    (calc-change-mode 'calc-float-format
 162                      (let* ((val (if n (prefix-numeric-value n) 0))
 163                             (mode (/ (+ val 5000) 10000)))
 164                        (if (or (< val -5000) (> mode 3))
 165                            (error "Prefix out of range"))
 166                        (setq n (list (aref [float sci eng fix] mode)
 167                                      (- (% (+ val 5000) 10000) 5000))))
 168                      t)
 169    (if (eq (nth 1 n) 0)
 170        (message "Displaying floating-point numbers normally")
 171      (if (> (nth 1 n) 0)
 172          (message
 173           "Displaying floating-point numbers with %d significant digits"
 174           (nth 1 n))
 175        (message "Displaying floating-point numbers with (precision%d)"
 176                 (nth 1 n))))))
 177
 178 (defun calc-fix-notation (n)
 179   (interactive "NDigits after decimal point: ")
 180   (calc-wrapper
 181    (calc-change-mode 'calc-float-format
 182                      (setq n (list 'fix (if n (prefix-numeric-value n) 0)))
 183                      t)
 184    (message "Displaying floats with %d digits after decimal"
 185             (math-abs (nth 1 n)))))
 186
 187 (defun calc-sci-notation (n)
 188   (interactive "P")
 189   (calc-wrapper
 190    (calc-change-mode 'calc-float-format
 191                      (setq n (list 'sci (if n (prefix-numeric-value n) 0)))
 192                      t)
 193    (if (eq (nth 1 n) 0)
 194        (message "Displaying floats in scientific notation")
 195      (if (> (nth 1 n) 0)
 196          (message "Displaying scientific notation with %d significant digits"
 197                   (nth 1 n))
 198        (message "Displaying scientific notation with (precision%d)"
 199                 (nth 1 n))))))
 200
 201 (defun calc-eng-notation (n)
 202   (interactive "P")
 203   (calc-wrapper
 204    (calc-change-mode 'calc-float-format
 205                      (setq n (list 'eng (if n (prefix-numeric-value n) 0)))
 206                      t)
 207    (if (eq (nth 1 n) 0)
 208        (message "Displaying floats in engineering notation")
 209      (if (> (nth 1 n) 0)
 210          (message "Displaying engineering notation with %d significant digits"
 211                   (nth 1 n))
 212        (message "Displaying engineering notation with (precision%d)"
 213                 (nth 1 n))))))
 214
 215
 216 (defun calc-truncate-stack (n &optional rel)
 217   (interactive "P")
 218   (calc-wrapper
 219    (let ((oldtop calc-stack-top)
 220          (newtop calc-stack-top))
 221      (calc-record-undo (list 'set 'saved-stack-top calc-stack-top))
 222      (let ((calc-stack-top 0)
 223            (nn (prefix-numeric-value n)))
 224        (setq newtop
 225              (if n
 226                  (progn
 227                    (if rel
 228                        (setq nn (+ oldtop nn))
 229                      (if (< nn 0)
 230                          (setq nn (+ nn (calc-stack-size)))
 231                        (setq nn (1+ nn))))
 232                    (if (< nn 1)
 233                        1
 234                      (if (> nn (calc-stack-size))
 235                          (calc-stack-size)
 236                        nn)))
 237                (max 1 (calc-locate-cursor-element (point)))))
 238        (if (= newtop oldtop)
 239            ()
 240          (calc-pop-stack 1 oldtop t)
 241          (calc-push-list '(top-of-stack) newtop)
 242          (if calc-line-numbering
 243              (calc-refresh))))
 244      (calc-record-undo (list 'set 'saved-stack-top 0))
 245      (setq calc-stack-top newtop))))
 246
 247 (defun calc-truncate-up (n)
 248   (interactive "p")
 249   (calc-truncate-stack n t))
 250
 251 (defun calc-truncate-down (n)
 252   (interactive "p")
 253   (calc-truncate-stack (- n) t))
 254
 255 (defun calc-display-raw (arg)
 256   (interactive "P")
 257   (calc-wrapper
 258    (setq calc-display-raw (if calc-display-raw nil (if arg 0 t)))
 259    (calc-do-refresh)
 260    (if calc-display-raw
 261        (message "Press d ' again to cancel \"raw\" display mode"))))
 262
 263
 264
 265
 266 ;;; Mode commands.
 267
 268 (defun calc-save-modes ()
 269   (interactive)
 270   (calc-wrapper
 271    (let (pos
 272          (vals (mapcar (function (lambda (v) (symbol-value (car v))))
 273                        calc-mode-var-list)))
 274      (unless calc-settings-file
 275        (error "No `calc-settings-file' specified"))
 276      (set-buffer (find-file-noselect (substitute-in-file-name
 277                                       calc-settings-file)))
 278      (goto-char (point-min))
 279      (if (and (search-forward ";;; Mode settings stored by Calc" nil t)
 280               (progn
 281                 (beginning-of-line)
 282                 (setq pos (point))
 283                 (search-forward "\n;;; End of mode settings" nil t)))
 284          (progn
 285            (beginning-of-line)
 286            (forward-line 1)
 287            (delete-region pos (point)))
 288        (goto-char (point-max))
 289        (insert "\n\n")
 290        (forward-char -1))
 291      (insert ";;; Mode settings stored by Calc on " (current-time-string) "\n")
 292      (let ((list calc-mode-var-list))
 293        (while list
 294          (let* ((v (car (car list)))
 295                 (def (nth 1 (car list)))
 296                 (val (car vals)))
 297            (or (equal val def)
 298                (progn
 299                  (insert "(setq " (symbol-name v) " ")
 300                  (if (and (or (listp val)
 301                               (symbolp val))
 302                           (not (memq val '(nil t))))
 303                      (insert "'"))
 304                  (insert (prin1-to-string val) ")\n"))))
 305          (setq list (cdr list)
 306                vals (cdr vals))))
 307      (run-hooks 'calc-mode-save-hook)
 308      (insert ";;; End of mode settings\n")
 309      (save-buffer)
 310      (if calc-embedded-info
 311          (calc-embedded-save-original-modes)))))
 312
 313 (defun calc-settings-file-name (name &optional arg)
 314   (interactive
 315    (list (read-file-name (format "Settings file name (normally %s): "
 316                                  (abbreviate-file-name calc-settings-file)))
 317          current-prefix-arg))
 318   (calc-wrapper
 319    (setq arg (if arg (prefix-numeric-value arg) 0))
 320    (if (string-equal (file-name-nondirectory name) "")
 321        (message "Calc settings file is \"%s\"" calc-settings-file)
 322      (if (< (math-abs arg) 2)
 323          (let ((list calc-mode-var-list))
 324            (while list
 325              (set (car (car list)) (nth 1 (car list)))
 326              (setq list (cdr list)))))
 327      (setq calc-settings-file name)
 328      (or (and
 329           calc-settings-file
 330           (equal user-init-file calc-settings-file)
 331           (> arg 0))
 332          (< arg 0)
 333          (load name t)
 334          (message "New file")))))
 335
 336 (defun math-get-modes-vec ()
 337   (list 'vec
 338         calc-internal-prec
 339         calc-word-size
 340         (calc-stack-size)
 341         calc-number-radix
 342         (+ (if (<= (nth 1 calc-float-format) 0)
 343                (+ calc-internal-prec (nth 1 calc-float-format))
 344              (nth 1 calc-float-format))
 345            (cdr (assq (car calc-float-format)
 346                       '((float . 0) (sci . 10000)
 347                         (eng . 20000) (fix . 30000)))))
 348         (cond ((eq calc-angle-mode 'rad) 2)
 349               ((eq calc-angle-mode 'hms) 3)
 350               (t 1))
 351         (if calc-symbolic-mode 1 0)
 352         (if calc-prefer-frac 1 0)
 353         (if (eq calc-complex-mode 'polar) 1 0)
 354         (cond ((eq calc-matrix-mode 'scalar) 0)
 355               ((eq calc-matrix-mode 'matrix) -2)
 356               ((eq calc-matrix-mode 'sqmatrix) -3)
 357               (calc-matrix-mode)
 358               (t -1))
 359         (cond ((eq calc-simplify-mode 'none) -1)
 360               ((eq calc-simplify-mode 'num) 0)
 361               ((eq calc-simplify-mode 'binary) 2)
 362               ((eq calc-simplify-mode 'alg) 3)
 363               ((eq calc-simplify-mode 'ext) 4)
 364               ((eq calc-simplify-mode 'units) 5)
 365               (t 1))
 366         (cond ((eq calc-infinite-mode 1) 0)
 367               (calc-infinite-mode 1)
 368               (t -1))))
 369
 370 (defun calc-get-modes (n)
 371   (interactive "P")
 372   (calc-wrapper
 373    (let ((modes (math-get-modes-vec)))
 374      (calc-enter-result 0 "mode"
 375                         (if n
 376                             (if (and (>= (setq n (prefix-numeric-value n)) 1)
 377                                      (< n (length modes)))
 378                                 (nth n modes)
 379                               (error "Prefix out of range"))
 380                           modes)))))
 381
 382 (defun calc-shift-prefix (arg)
 383   (interactive "P")
 384   (calc-wrapper
 385    (setq calc-shift-prefix (if arg
 386                                (> (prefix-numeric-value arg) 0)
 387                              (not calc-shift-prefix)))
 388    (calc-init-prefixes)
 389    (message (if calc-shift-prefix
 390                 "Prefix keys are now case-insensitive"
 391               "Prefix keys must be unshifted (except V, Z)"))))
 392
 393 (defun calc-mode-record-mode (n)
 394   (interactive "P")
 395   (calc-wrapper
 396    (calc-change-mode 'calc-mode-save-mode
 397                      (cond ((null n)
 398                             (cond ((not calc-embedded-info)
 399                                    (if (eq calc-mode-save-mode 'save)
 400                                        'local 'save))
 401                                   ((eq calc-mode-save-mode 'local)  'edit)
 402                                   ((eq calc-mode-save-mode 'edit)   'perm)
 403                                   ((eq calc-mode-save-mode 'perm)   'global)
 404                                   ((eq calc-mode-save-mode 'global) 'save)
 405                                   ((eq calc-mode-save-mode 'save)   nil)
 406                                   ((eq calc-mode-save-mode nil)     'local)))
 407                            ((= (setq n (prefix-numeric-value n)) 0) nil)
 408                            ((= n 2) 'edit)
 409                            ((= n 3) 'perm)
 410                            ((= n 4) 'global)
 411                            ((= n 5) 'save)
 412                            (t 'local)))
 413    (message "%s"
 414             (cond ((and (eq calc-mode-save-mode 'local) calc-embedded-info)
 415                    "Recording mode changes with [calc-mode: ...]")
 416                   ((eq calc-mode-save-mode 'edit)
 417                    "Recording mode changes with [calc-edit-mode: ...]")
 418                   ((eq calc-mode-save-mode 'perm)
 419                    "Recording mode changes with [calc-perm-mode: ...]")
 420                   ((eq calc-mode-save-mode 'global)
 421                    "Recording mode changes with [calc-global-mode: ...]")
 422                   ((eq calc-mode-save-mode 'save)
 423                    (format "Recording mode changes in \"%s\""
 424                            calc-settings-file))
 425                   (t
 426                    "Not recording mode changes permanently")))))
 427
 428 (defun calc-total-algebraic-mode (flag)
 429   (interactive "P")
 430   (calc-wrapper
 431    (if (eq calc-algebraic-mode 'total)
 432        (calc-algebraic-mode nil)
 433      (calc-change-mode '(calc-algebraic-mode calc-incomplete-algebraic-mode)
 434                        '(total nil))
 435      (use-local-map calc-alg-map)
 436      (message
 437       "All keys begin algebraic entry; use Meta (ESC) for Calc keys"))))
 438
 439 (defun calc-algebraic-mode (flag)
 440   (interactive "P")
 441   (calc-wrapper
 442    (if flag
 443        (calc-change-mode '(calc-algebraic-mode
 444                            calc-incomplete-algebraic-mode)
 445                          (list nil (not calc-incomplete-algebraic-mode)))
 446      (calc-change-mode '(calc-algebraic-mode calc-incomplete-algebraic-mode)
 447                        (list (not calc-algebraic-mode) nil)))
 448    (use-local-map calc-mode-map)
 449    (message (if calc-algebraic-mode
 450                 "Numeric keys and ( and [ begin algebraic entry"
 451               (if calc-incomplete-algebraic-mode
 452                   "Only ( and [ begin algebraic entry"
 453                 "No keys except ' and $ begin algebraic entry")))))
 454
 455 (defun calc-symbolic-mode (n)
 456   (interactive "P")
 457   (calc-wrapper
 458
 459    (message (if (calc-change-mode 'calc-symbolic-mode n nil t)
 460                 "Inexact computations like sqrt(2) are deferred"
 461               "Numerical computations are always done immediately"))))
 462
 463 (defun calc-infinite-mode (n)
 464   (interactive "P")
 465   (calc-wrapper
 466    (if (eq n 0)
 467        (progn
 468          (calc-change-mode 'calc-infinite-mode 1)
 469          (message "Computations like 1 / 0 produce \"inf\""))
 470      (message (if (calc-change-mode 'calc-infinite-mode n nil t)
 471                   "Computations like 1 / 0 produce \"uinf\""
 472                 "Computations like 1 / 0 are left unsimplified")))))
 473
 474 (defun calc-matrix-mode (arg)
 475   (interactive "P")
 476   (calc-wrapper
 477    (calc-change-mode 'calc-matrix-mode
 478                      (cond ((eq arg 0) 'scalar)
 479                            ((< (prefix-numeric-value arg) 1)
 480                             (and (< (prefix-numeric-value arg) -1) 'matrix))
 481                            (arg
 482                             (if (consp arg) 'sqmatrix
 483                               (prefix-numeric-value arg)))
 484                            ((eq calc-matrix-mode 'matrix) 'scalar)
 485                            ((eq calc-matrix-mode 'scalar) nil)
 486                            (t 'matrix)))
 487    (if (integerp calc-matrix-mode)
 488        (message "Variables are assumed to be %dx%d matrices"
 489                 calc-matrix-mode calc-matrix-mode)
 490      (message (if (eq calc-matrix-mode 'matrix)
 491                   "Variables are assumed to be matrices"
 492                 (if (eq calc-matrix-mode 'sqmatrix)
 493                     "Variables are assumed to be square matrices"
 494                   (if calc-matrix-mode
 495                       "Variables are assumed to be scalars (non-matrices)"
 496                     "Variables are not assumed to be matrix or scalar")))))))
 497
 498 (defun calc-set-simplify-mode (mode arg msg)
 499   (calc-change-mode 'calc-simplify-mode
 500                     (cond
 501                      (arg mode)
 502                      ((eq calc-simplify-mode mode)
 503                       'alg)
 504                      (t mode)))
 505   (message "%s" (if (eq calc-simplify-mode mode)
 506                msg
 507              "Algebraic simplification occurs by default")))
 508
 509 (defun calc-no-simplify-mode (arg)
 510   (interactive "P")
 511   (calc-wrapper
 512    (calc-set-simplify-mode 'none arg
 513                            "Simplification is disabled")))
 514
 515 (defun calc-num-simplify-mode (arg)
 516   (interactive "P")
 517   (calc-wrapper
 518    (calc-set-simplify-mode 'num arg
 519                            "Basic simplifications apply only if arguments are numeric")))
 520
 521 (defun calc-default-simplify-mode (arg)
 522   (interactive "P")
 523   (cond ((or (not arg) (= arg 3))
 524          (calc-wrapper
 525           (calc-set-simplify-mode
 526            'alg nil "Algebraic simplification occurs by default")))
 527          ((= arg 1)
 528          (calc-wrapper
 529           (calc-set-simplify-mode
 530            nil nil "Only basic simplifications occur by default")))
 531         ((= arg 0) (calc-num-simplify-mode 1))
 532         ((< arg 0) (calc-no-simplify-mode 1))
 533         ((= arg 2) (calc-bin-simplify-mode 1))
 534         ((= arg 4) (calc-ext-simplify-mode 1))
 535         ((= arg 5) (calc-units-simplify-mode 1))
 536         (t (error "Prefix argument out of range"))))
 537
 538 (defun calc-bin-simplify-mode (arg)
 539   (interactive "P")
 540   (calc-wrapper
 541    (calc-set-simplify-mode 'binary arg
 542                            (format "Binary simplification occurs by default (word size=%d)"
 543                                    calc-word-size))))
 544
 545 (defun calc-basic-simplify-mode (arg)
 546   (interactive "P")
 547   (calc-wrapper
 548    (calc-set-simplify-mode nil arg
 549                            "Only basic simplifications occur by default")))
 550
 551 (defun calc-alg-simplify-mode (arg)
 552   (interactive "P")
 553   (calc-wrapper
 554    (calc-set-simplify-mode 'alg arg
 555                            "Algebraic simplification occurs by default")))
 556
 557 (defun calc-ext-simplify-mode (arg)
 558   (interactive "P")
 559   (calc-wrapper
 560    (calc-set-simplify-mode 'ext arg
 561                            "Extended algebraic simplification occurs by default")))
 562
 563 (defun calc-units-simplify-mode (arg)
 564   (interactive "P")
 565   (calc-wrapper
 566    (calc-set-simplify-mode 'units arg
 567                            "Units simplification occurs by default")))
 568
 569 (defun calc-auto-recompute (arg)
 570   (interactive "P")
 571   (calc-wrapper
 572    (calc-change-mode 'calc-auto-recompute arg nil t)
 573    (calc-refresh-evaltos)
 574    (message (if calc-auto-recompute
 575                 "Automatically recomputing `=>' forms when necessary"
 576               "Not recomputing `=>' forms automatically"))))
 577
 578 (defun calc-working (n)
 579   (interactive "P")
 580   (calc-wrapper
 581    (cond ((consp n)
 582           (calc-pop-push-record 0 "work"
 583                                 (cond ((eq calc-display-working-message t) 1)
 584                                       (calc-display-working-message 2)
 585                                       (t 0))))
 586          ((eq n 2) (calc-change-mode 'calc-display-working-message 'lots))
 587          ((eq n 0) (calc-change-mode 'calc-display-working-message nil))
 588          ((eq n 1) (calc-change-mode 'calc-display-working-message t)))
 589    (cond ((eq calc-display-working-message t)
 590           (message "\"Working...\" messages enabled"))
 591          (calc-display-working-message
 592           (message "Detailed \"Working...\" messages enabled"))
 593          (t
 594           (message "\"Working...\" messages disabled")))))
 595
 596 (defun calc-always-load-extensions ()
 597   (interactive)
 598   (calc-wrapper
 599    (if (setq calc-always-load-extensions (not calc-always-load-extensions))
 600        (message "Always loading extensions package")
 601      (message "Loading extensions package on demand only"))))
 602
 603
 604 (defun calc-matrix-left-justify ()
 605   (interactive)
 606   (calc-wrapper
 607    (calc-change-mode 'calc-matrix-just nil t)
 608    (message "Matrix elements will be left-justified in columns")))
 609
 610 (defun calc-matrix-center-justify ()
 611   (interactive)
 612   (calc-wrapper
 613    (calc-change-mode 'calc-matrix-just 'center t)
 614    (message "Matrix elements will be centered in columns")))
 615
 616 (defun calc-matrix-right-justify ()
 617   (interactive)
 618   (calc-wrapper
 619    (calc-change-mode 'calc-matrix-just 'right t)
 620    (message "Matrix elements will be right-justified in columns")))
 621
 622 (defun calc-full-vectors (n)
 623   (interactive "P")
 624   (calc-wrapper
 625    (message (if (calc-change-mode 'calc-full-vectors n t t)
 626                 "Displaying long vectors in full"
 627               "Displaying long vectors in [a, b, c, ..., z] notation"))))
 628
 629 (defun calc-full-trail-vectors (n)
 630   (interactive "P")
 631   (calc-wrapper
 632    (message (if (calc-change-mode 'calc-full-trail-vectors n nil t)
 633                 "Recording long vectors in full"
 634               "Recording long vectors in [a, b, c, ..., z] notation"))))
 635
 636 (defun calc-break-vectors (n)
 637   (interactive "P")
 638   (calc-wrapper
 639    (message (if (calc-change-mode 'calc-break-vectors n t t)
 640                 "Displaying vector elements one-per-line"
 641               "Displaying vector elements all on one line"))))
 642
 643 (defun calc-vector-commas ()
 644   (interactive)
 645   (calc-wrapper
 646    (if (calc-change-mode 'calc-vector-commas (if calc-vector-commas nil ",") t)
 647        (message "Separating vector elements with \",\"")
 648      (message "Separating vector elements with spaces"))))
 649
 650 (defun calc-vector-brackets ()
 651   (interactive)
 652   (calc-wrapper
 653    (if (calc-change-mode 'calc-vector-brackets
 654                          (if (equal calc-vector-brackets "[]") nil "[]") t)
 655        (message "Surrounding vectors with \"[]\"")
 656      (message "Not surrounding vectors with brackets"))))
 657
 658 (defun calc-vector-braces ()
 659   (interactive)
 660   (calc-wrapper
 661    (if (calc-change-mode 'calc-vector-brackets
 662                          (if (equal calc-vector-brackets "{}") nil "{}") t)
 663        (message "Surrounding vectors with \"{}\"")
 664      (message "Not surrounding vectors with brackets"))))
 665
 666 (defun calc-vector-parens ()
 667   (interactive)
 668   (calc-wrapper
 669    (if (calc-change-mode 'calc-vector-brackets
 670                          (if (equal calc-vector-brackets "()") nil "()") t)
 671        (message "Surrounding vectors with \"()\"")
 672      (message "Not surrounding vectors with brackets"))))
 673
 674 (defun calc-matrix-brackets (arg)
 675   (interactive "sCode letters (R, O, C): ")
 676   (calc-wrapper
 677    (let ((code (append (and (string-match "[rR]" arg) '(R))
 678                        (and (string-match "[oO]" arg) '(O))
 679                        (and (string-match "[cC]" arg) '(C))
 680                        (and (string-match "[pP]" arg) '(P))))
 681          (bad (string-match "[^rRoOcCpP ]" arg)))
 682      (if bad
 683          (error "Unrecognized character: %c" (aref arg bad)))
 684      (calc-change-mode 'calc-matrix-brackets code t))))
 685
 686 (provide 'calc-mode)
 687
 688 ;;; calc-mode.el ends here