1 ;;; calc-sel.el --- data selection functions for Calc
3 ;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.
5 ;; Author: David Gillespie <daveg@synaptics.com>
6 ;; Maintainer: Colin Walters <walters@debian.org>
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is distributed in the hope that it will be useful,
11 ;; but WITHOUT ANY WARRANTY. No author or distributor
12 ;; accepts responsibility to anyone for the consequences of using it
13 ;; or for whether it serves any particular purpose or works at all,
14 ;; unless he says so in writing. Refer to the GNU Emacs General Public
15 ;; License for full details.
17 ;; Everyone is granted permission to copy, modify and redistribute
18 ;; GNU Emacs, but only under the conditions described in the
19 ;; GNU Emacs General Public License. A copy of this license is
20 ;; supposed to have been given to you along with GNU Emacs so you
21 ;; can know your rights and responsibilities. It should be in a
22 ;; file named COPYING. Among other things, the copyright notice
23 ;; and this notice must be preserved on all copies.
29 ;; This file is autoloaded from calc-ext.el.
34 (defun calc-Need-calc-sel () nil)
37 ;;; Selection commands.
39 (defvar calc-keep-selection t)
41 (defun calc-select-here (num &optional once keep)
44 (calc-prepare-selection)
45 (let ((found (calc-find-selected-part))
46 (entry calc-selection-cache-entry))
47 (or (and keep (nth 2 entry))
50 (setq calc-keep-selection nil)
51 (message "(Selection will apply to next command only)")))
52 (calc-change-current-selection
54 (if (and num (> (setq num (prefix-numeric-value num)) 0))
56 (while (and (>= (setq num (1- num)) 0)
57 (not (eq found (car entry))))
58 (setq found (calc-find-assoc-parent-formula
61 (calc-grow-assoc-formula (car entry) found))
64 (defun calc-select-once (num)
66 (calc-select-here num t))
68 (defun calc-select-here-maybe (num)
70 (calc-select-here num nil t))
72 (defun calc-select-once-maybe (num)
74 (calc-select-here num t t))
76 (defun calc-select-additional ()
79 (let (calc-keep-selection)
80 (calc-prepare-selection))
81 (let ((found (calc-find-selected-part))
82 (entry calc-selection-cache-entry))
83 (calc-change-current-selection
85 (let ((sel (nth 2 entry)))
88 (while (not (or (eq sel (car entry))
89 (calc-find-sub-formula sel found)))
90 (setq sel (calc-find-assoc-parent-formula
93 (calc-grow-assoc-formula (car entry) found)))
96 (defun calc-select-more (num)
99 (calc-prepare-selection)
100 (let ((entry calc-selection-cache-entry))
102 (let ((sel (nth 2 entry)))
103 (while (and (not (eq sel (car entry)))
104 (>= (setq num (1- (prefix-numeric-value num))) 0))
105 (setq sel (calc-find-assoc-parent-formula (car entry) sel)))
106 (calc-change-current-selection sel))
107 (calc-select-here num)))))
109 (defun calc-select-less (num)
112 (calc-prepare-selection)
113 (let ((found (calc-find-selected-part))
114 (entry calc-selection-cache-entry))
115 (calc-change-current-selection
117 (let ((sel (nth 2 entry))
121 (>= (setq num (1- num)) 0))
123 index (calc-find-sub-formula sel found))
124 (and (setq sel (and index (nth index old)))
125 calc-assoc-selections
126 (setq op (assq (car-safe sel) calc-assoc-ops))
127 (memq (car old) (nth index op))
128 (setq num (1+ num))))
131 (defun calc-select-part (num)
133 (or num (setq num (- last-command-char ?0)))
135 (calc-prepare-selection)
136 (let ((sel (calc-find-nth-part (or (nth 2 calc-selection-cache-entry)
137 (car calc-selection-cache-entry))
140 (calc-change-current-selection sel)
141 (error "%d is not a valid sub-formula index" num)))))
143 (defun calc-find-nth-part (expr num)
144 (if (and calc-assoc-selections
145 (assq (car-safe expr) calc-assoc-ops))
147 (calc-find-nth-part-rec expr))
148 (if (eq (car-safe expr) 'intv)
149 (and (>= num 1) (<= num 2) (nth (1+ num) expr))
150 (and (not (Math-primp expr)) (>= num 1) (< num (length expr))
153 (defun calc-find-nth-part-rec (expr) ; uses num, op
154 (or (if (and (setq op (assq (car-safe (nth 1 expr)) calc-assoc-ops))
155 (memq (car expr) (nth 1 op)))
156 (calc-find-nth-part-rec (nth 1 expr))
157 (and (= (setq num (1- num)) 0)
159 (if (and (setq op (assq (car-safe (nth 2 expr)) calc-assoc-ops))
160 (memq (car expr) (nth 2 op)))
161 (calc-find-nth-part-rec (nth 2 expr))
162 (and (= (setq num (1- num)) 0)
165 (defun calc-select-next (num)
168 (calc-select-previous (- num))
170 (calc-prepare-selection)
171 (let* ((entry calc-selection-cache-entry)
175 (while (>= (setq num (1- num)) 0)
176 (let* ((parent (calc-find-parent-formula (car entry) sel))
179 (and (eq p t) (setq p nil))
180 (while (and (setq p (cdr p))
181 (not (eq (car p) sel))))
183 (setq sel (or (and calc-assoc-selections
184 (setq op (assq (car-safe (nth 1 p))
186 (memq (car parent) (nth 2 op))
189 (if (and calc-assoc-selections
190 (setq op (assq (car-safe parent) calc-assoc-ops))
191 (consp (setq p (calc-find-parent-formula
192 (car entry) parent)))
193 (eq (nth 1 p) parent)
194 (memq (car p) (nth 1 op)))
196 (error "No \"next\" sub-formula")))))
197 (calc-change-current-selection sel))
198 (if (Math-primp (car entry))
199 (calc-change-current-selection (car entry))
200 (calc-select-part num)))))))
202 (defun calc-select-previous (num)
205 (calc-select-next (- num))
207 (calc-prepare-selection)
208 (let* ((entry calc-selection-cache-entry)
212 (while (>= (setq num (1- num)) 0)
213 (let* ((parent (calc-find-parent-formula (car entry) sel))
214 (p (cdr-safe parent))
217 (if (eq (car-safe parent) 'intv) (setq p (cdr p)))
218 (while (and (not (eq (car p) sel))
222 (setq sel (or (and calc-assoc-selections
223 (setq op (assq (car-safe prev)
225 (memq (car parent) (nth 1 op))
228 (if (and calc-assoc-selections
229 (setq op (assq (car-safe parent) calc-assoc-ops))
230 (consp (setq p (calc-find-parent-formula
231 (car entry) parent)))
232 (eq (nth 2 p) parent)
233 (memq (car p) (nth 2 op)))
235 (error "No \"previous\" sub-formula")))))
236 (calc-change-current-selection sel))
237 (if (Math-primp (car entry))
238 (calc-change-current-selection (car entry))
239 (let ((len (if (and calc-assoc-selections
240 (assq (car (car entry)) calc-assoc-ops))
242 (calc-find-nth-part-rec (car entry))
244 (length (car entry)))))
245 (calc-select-part (- len num)))))))))
247 (defun calc-find-parent-formula (expr part)
248 (cond ((eq expr part) t)
249 ((Math-primp expr) nil)
252 (while (and (setq p (cdr p))
253 (not (setq res (calc-find-parent-formula
256 (if (eq res t) expr res))))))
259 (defun calc-find-assoc-parent-formula (expr part)
260 (calc-grow-assoc-formula expr (calc-find-parent-formula expr part)))
262 (defun calc-grow-assoc-formula (expr part)
263 (if calc-assoc-selections
264 (let ((op (assq (car-safe part) calc-assoc-ops)))
267 (while (and (consp (setq new (calc-find-parent-formula
270 (nth (calc-find-sub-formula new part) op)))
275 (defun calc-find-sub-formula (expr part)
276 (cond ((eq expr part) t)
277 ((Math-primp expr) nil)
280 (while (and (setq expr (cdr expr))
281 (not (calc-find-sub-formula (car expr) part)))
285 (defun calc-unselect (num)
288 (calc-prepare-selection num)
289 (calc-change-current-selection nil)))
291 (defun calc-clear-selections ()
294 (let ((limit (calc-stack-size))
297 (if (calc-top n 'sel)
299 (calc-prepare-selection n)
300 (calc-change-current-selection nil)))
302 (calc-clear-command-flag 'position-point)))
304 (defun calc-show-selections (arg)
307 (calc-preserve-point)
308 (setq calc-show-selections (if arg
309 (> (prefix-numeric-value arg) 0)
310 (not calc-show-selections)))
311 (let ((p calc-stack))
313 (or (null (nth 2 (car p)))
314 (equal (car p) calc-selection-cache-entry)))
317 (let ((calc-selection-cache-default-entry
318 calc-selection-cache-entry))
320 (and calc-selection-cache-entry
321 (let ((sel (nth 2 calc-selection-cache-entry)))
322 (setcar (nthcdr 2 calc-selection-cache-entry) nil)
323 (calc-change-current-selection sel)))))
324 (message (if calc-show-selections
325 "Displaying only selected part of formulas"
326 "Displaying all but selected part of formulas"))))
328 (defun calc-preserve-point ()
329 (or (looking-at "\\.\n+\\'")
331 (setq calc-final-point-line (+ (count-lines (point-min) (point))
333 calc-final-point-column (current-column))
334 (calc-set-command-flag 'position-point))))
336 (defun calc-enable-selections (arg)
339 (calc-preserve-point)
340 (setq calc-use-selections (if arg
341 (> (prefix-numeric-value arg) 0)
342 (not calc-use-selections)))
343 (calc-set-command-flag 'renum-stack)
344 (message (if calc-use-selections
345 "Commands operate only on selected sub-formulas"
346 "Selections of sub-formulas have no effect"))))
348 (defun calc-break-selections (arg)
351 (calc-preserve-point)
352 (setq calc-assoc-selections (if arg
353 (<= (prefix-numeric-value arg) 0)
354 (not calc-assoc-selections)))
355 (message (if calc-assoc-selections
356 "Selection treats a+b+c as a sum of three terms"
357 "Selection treats a+b+c as (a+b)+c"))))
359 (defvar calc-selection-cache-entry nil)
360 (defun calc-prepare-selection (&optional num)
361 (or num (setq num (calc-locate-cursor-element (point))))
362 (setq calc-selection-true-num num
363 calc-keep-selection t)
364 (or (> num 0) (setq num 1))
365 ;; (if (or (< num 1) (> num (calc-stack-size)))
366 ;; (error "Cursor must be positioned on a stack element"))
367 (let* ((entry (calc-top num 'entry))
369 (or (equal entry calc-selection-cache-entry)
371 (setcar entry (calc-encase-atoms (car entry)))
372 (setq calc-selection-cache-entry entry
373 calc-selection-cache-num num
374 calc-selection-cache-comp
375 (let ((math-comp-tagged t))
376 (math-compose-expr (car entry) 0))
377 calc-selection-cache-offset
378 (+ (car (math-stack-value-offset calc-selection-cache-comp))
379 (length calc-left-label)
380 (if calc-line-numbering 4 0))))))
381 (calc-preserve-point))
383 ;;; The following ensures that no two subformulas will be "eq" to each other!
384 (defun calc-encase-atoms (x)
385 (if (or (not (consp x))
386 (equal x '(float 0 0)))
388 (calc-encase-atoms-rec x)
391 (defun calc-encase-atoms-rec (x)
394 (if (eq (car x) 'intv)
396 (while (setq x (cdr x))
397 (if (or (not (consp (car x)))
398 (equal (car x) '(float 0 0)))
399 (setcar x (list 'cplx (car x) 0))
400 (calc-encase-atoms-rec (car x)))))))
402 (defun calc-find-selected-part ()
403 (let* ((math-comp-sel-hpos (- (current-column) calc-selection-cache-offset))
407 (math-comp-sel-vpos (save-excursion
409 (let ((line (point)))
410 (calc-cursor-stack-index
411 calc-selection-cache-num)
413 (while (< (point) line)
415 (setq spaces (+ spaces
416 (current-indentation))
418 (- lcount (math-comp-ascent
419 calc-selection-cache-comp) -1))))
420 (math-comp-sel-cpos (- (point) toppt calc-selection-cache-offset
422 (math-comp-sel-tag nil))
423 (and (>= math-comp-sel-hpos 0)
424 (> calc-selection-true-num 0)
425 (math-composition-to-string calc-selection-cache-comp 1000000))
426 (nth 1 math-comp-sel-tag)))
428 (defun calc-change-current-selection (sub-expr)
429 (or (eq sub-expr (nth 2 calc-selection-cache-entry))
430 (let ((calc-prepared-composition calc-selection-cache-comp)
431 (buffer-read-only nil)
433 (calc-set-command-flag 'renum-stack)
434 (setcar (nthcdr 2 calc-selection-cache-entry) sub-expr)
435 (calc-cursor-stack-index calc-selection-cache-num)
437 (calc-cursor-stack-index (1- calc-selection-cache-num))
438 (delete-region top (point))
439 (let ((calc-selection-cache-default-entry calc-selection-cache-entry))
440 (insert (math-format-stack-value calc-selection-cache-entry)
443 (defun calc-top-selected (&optional n m)
444 (and calc-any-selections
449 (calc-check-stack (+ n m -1))
450 (let ((top (nthcdr (+ m calc-stack-top -1) calc-stack))
452 (while (>= (setq n (1- n)) 0)
453 (if (nth 2 (car top))
454 (setq sel (if sel t (nth 2 (car top)))))
455 (setq top (cdr top)))
458 (defun calc-replace-sub-formula (expr old new)
459 (setq new (calc-encase-atoms new))
460 (calc-replace-sub-formula-rec expr))
462 (defun calc-replace-sub-formula-rec (expr)
463 (cond ((eq expr old) new)
464 ((Math-primp expr) expr)
467 (mapcar 'calc-replace-sub-formula-rec (cdr expr))))))
469 (defun calc-sel-error ()
470 (error "Illegal operation on sub-formulas"))
472 (defun calc-replace-selections (n vals m)
473 (if (calc-top-selected n m)
474 (let ((num (length vals)))
475 (calc-preserve-point)
478 (let* ((old (calc-top-list n m 'entry))
483 (if (nth 2 (car old))
484 (setq val (calc-encase-atoms (car vals))
485 new (cons (calc-replace-sub-formula (car (car old))
490 (setq new (cons (car vals) new)
492 (setq vals (cdr vals)
494 (calc-pop-stack n m t)
495 (calc-push-list (nreverse new)
496 m (and calc-keep-selection (nreverse sel)))))
498 (let* ((old (calc-top-list n m 'entry))
500 (while (and old (not (nth 2 (car old))))
501 (setq old (cdr old)))
503 (while (and (setq more (cdr more)) (not (nth 2 (car more)))))
506 (calc-pop-stack n m t)
508 (let ((val (calc-encase-atoms (car vals))))
509 (calc-push-list (list (calc-replace-sub-formula
513 m (and calc-keep-selection (list val))))
514 (calc-push-list vals))))
515 (t (calc-sel-error))))
516 (calc-pop-stack n m t)
517 (calc-push-list vals m)))
519 (defun calc-delete-selection (n)
520 (let ((entry (calc-top n 'entry)))
522 (if (eq (nth 2 entry) (car entry))
524 (calc-pop-stack 1 n t)
525 (calc-push-list '(0) n))
526 (let ((parent (calc-find-parent-formula (car entry) (nth 2 entry)))
528 (calc-preserve-point)
529 (calc-pop-stack 1 n t)
530 (cond ((or (memq (car parent) '(* / %))
531 (and (eq (car parent) '^)
532 (eq (nth 2 parent) (nth 2 entry))))
534 ((memq (car parent) '(vec calcFunc-min calcFunc-max)))
535 ((and (assq (car parent) calc-tweak-eqn-table)
536 (= (length parent) 3))
542 (calc-push-list (list
544 (calc-replace-sub-formula
547 (if (eq (nth 2 entry) (nth 1 parent))
552 (calc-push-list (list
554 (calc-replace-sub-formula (car entry)
559 (calc-push-list (list
561 (calc-replace-sub-formula (car entry)
567 (calc-pop-stack 1 n t))))
569 (defun calc-roll-down-with-selections (n m)
570 (let ((vals (append (calc-top-list m 1)
571 (calc-top-list (- n m) (1+ m))))
572 (sels (append (calc-top-list m 1 'sel)
573 (calc-top-list (- n m) (1+ m) 'sel))))
574 (calc-pop-push-list n vals 1 sels)))
576 (defun calc-roll-up-with-selections (n m)
577 (let ((vals (append (calc-top-list (- n m) 1)
578 (calc-top-list m (- n m -1))))
579 (sels (append (calc-top-list (- n m) 1 'sel)
580 (calc-top-list m (- n m -1) 'sel))))
581 (calc-pop-push-list n vals 1 sels)))
583 (defun calc-auto-selection (entry)
586 (and (boundp 'reselect) (setq reselect nil))
587 (calc-prepare-selection)
588 (calc-grow-assoc-formula (car entry) (calc-find-selected-part)))))
590 (defun calc-copy-selection ()
593 (calc-preserve-point)
594 (let* ((num (max 1 (calc-locate-cursor-element (point))))
595 (entry (calc-top num 'entry)))
596 (calc-push (or (calc-auto-selection entry) (car entry))))))
598 (defun calc-del-selection ()
601 (calc-preserve-point)
602 (let* ((num (max 1 (calc-locate-cursor-element (point))))
603 (entry (calc-top num 'entry))
604 (sel (calc-auto-selection entry)))
605 (setcar (nthcdr 2 entry) (and (not (eq sel (car entry))) sel))
606 (calc-delete-selection num))))
608 (defun calc-enter-selection ()
611 (calc-preserve-point)
612 (let* ((num (max 1 (calc-locate-cursor-element (point))))
613 (reselect calc-keep-selection)
614 (entry (calc-top num 'entry))
616 (sel (or (calc-auto-selection entry) expr))
618 (let ((calc-dollar-values (list sel))
619 (calc-dollar-used 0))
620 (setq alg (calc-do-alg-entry "" "Replace selection with: "))
623 (setq alg (calc-encase-atoms (car alg)))
624 (calc-pop-push-record-list 1 "repl"
625 (list (calc-replace-sub-formula
628 (list (and reselect alg))))))
629 (calc-handle-whys))))
631 (defun calc-edit-selection ()
634 (calc-preserve-point)
635 (let* ((num (max 1 (calc-locate-cursor-element (point))))
636 (reselect calc-keep-selection)
637 (entry (calc-top num 'entry))
639 (sel (or (calc-auto-selection entry) expr))
641 (let ((str (math-showing-full-precision
642 (math-format-nice-expr sel (frame-width)))))
643 (calc-edit-mode (list 'calc-finish-selection-edit
644 num (list 'quote sel) reselect))
646 (calc-show-edit-buffer))
648 (defun calc-finish-selection-edit (num sel reselect)
649 (let ((buf (current-buffer))
650 (str (buffer-substring (point) (point-max)))
652 (switch-to-buffer calc-original-buffer)
653 (let ((val (math-read-expr str)))
654 (if (eq (car-safe val) 'error)
656 (switch-to-buffer buf)
657 (goto-char (+ start (nth 1 val)))
658 (error (nth 2 val))))
660 (calc-preserve-point)
662 (calc-trail-display 1 t))
663 (setq val (calc-encase-atoms (calc-normalize val)))
664 (let ((expr (calc-top num 'full)))
665 (if (calc-find-sub-formula expr sel)
666 (calc-pop-push-record-list 1 "edit"
667 (list (calc-replace-sub-formula
670 (list (and reselect val)))
672 (error "Original selection has been lost")))))))
674 (defun calc-sel-evaluate (arg)
677 (calc-preserve-point)
678 (let* ((num (max 1 (calc-locate-cursor-element (point))))
679 (reselect calc-keep-selection)
680 (entry (calc-top num 'entry))
681 (sel (or (calc-auto-selection entry) (car entry))))
682 (calc-with-default-simplification
683 (let ((math-simplify-only nil))
684 (calc-modify-simplify-mode arg)
685 (let ((val (calc-encase-atoms (calc-normalize sel))))
686 (calc-pop-push-record-list 1 "jsmp"
687 (list (calc-replace-sub-formula
688 (car entry) sel val))
690 (list (and reselect val))))))
691 (calc-handle-whys))))
693 (defun calc-sel-expand-formula (arg)
696 (calc-preserve-point)
697 (let* ((num (max 1 (calc-locate-cursor-element (point))))
698 (reselect calc-keep-selection)
699 (entry (calc-top num 'entry))
700 (sel (or (calc-auto-selection entry) (car entry))))
701 (calc-with-default-simplification
702 (let ((math-simplify-only nil))
703 (calc-modify-simplify-mode arg)
704 (let* ((math-expand-formulas (> arg 0))
705 (val (calc-normalize sel))
708 (setq top (math-expand-formula val))
709 (setq val (calc-normalize top)))
710 (setq val (calc-encase-atoms val))
711 (calc-pop-push-record-list 1 "jexf"
712 (list (calc-replace-sub-formula
713 (car entry) sel val))
715 (list (and reselect val))))))
716 (calc-handle-whys))))
718 (defun calc-sel-mult-both-sides (no-simp &optional divide)
721 (calc-preserve-point)
722 (let* ((num (max 1 (calc-locate-cursor-element (point))))
723 (reselect calc-keep-selection)
724 (entry (calc-top num 'entry))
726 (sel (or (calc-auto-selection entry) expr))
727 (func (car-safe sel))
729 (setq alg (calc-with-default-simplification
730 (car (calc-do-alg-entry ""
732 "Divide both sides by: "
733 "Multiply both sides by: ")))))
736 (if (and (or (eq func '/)
737 (assq func calc-tweak-eqn-table))
740 (or (memq func '(/ calcFunc-eq calcFunc-neq))
741 (if (math-known-nonposp alg)
743 (setq func (nth 1 (assq func
744 calc-tweak-eqn-table)))
745 (or (math-known-negp alg)
746 (message "Assuming this factor is nonzero")))
747 (or (math-known-posp alg)
748 (if (math-known-nonnegp alg)
749 (message "Assuming this factor is nonzero")
750 (message "Assuming this factor is positive")))))
751 (setq lhs (list (if divide '/ '*) (nth 1 sel) alg)
752 rhs (list (if divide '/ '*) (nth 2 sel) alg))
755 (setq lhs (math-simplify lhs)
756 rhs (math-simplify rhs))
758 (or (Math-equal (nth 1 sel) 1)
759 (Math-equal (nth 1 sel) -1)
760 (and (memq (car-safe (nth 2 sel)) '(+ -))
761 (memq (car-safe alg) '(+ -))))
762 (setq rhs (math-expand-term rhs)))))
763 (setq alg (calc-encase-atoms
764 (calc-normalize (list func lhs rhs)))))
765 (setq rhs (list (if divide '* '/) sel alg))
767 (setq rhs (math-simplify rhs)))
768 (setq alg (calc-encase-atoms
769 (calc-normalize (if divide
771 (list '* alg rhs))))))
772 (calc-pop-push-record-list 1 (if divide "div" "mult")
773 (list (calc-replace-sub-formula
776 (list (and reselect alg)))))
777 (calc-handle-whys))))
779 (defun calc-sel-div-both-sides (no-simp)
781 (calc-sel-mult-both-sides no-simp t))
783 (defun calc-sel-add-both-sides (no-simp &optional subtract)
786 (calc-preserve-point)
787 (let* ((num (max 1 (calc-locate-cursor-element (point))))
788 (reselect calc-keep-selection)
789 (entry (calc-top num 'entry))
791 (sel (or (calc-auto-selection entry) expr))
792 (func (car-safe sel))
794 (setq alg (calc-with-default-simplification
795 (car (calc-do-alg-entry ""
797 "Subtract from both sides: "
798 "Add to both sides: ")))))
801 (if (and (assq func calc-tweak-eqn-table)
804 (setq lhs (list (if subtract '- '+) (nth 1 sel) alg)
805 rhs (list (if subtract '- '+) (nth 2 sel) alg))
807 (setq lhs (math-simplify lhs)
808 rhs (math-simplify rhs)))
809 (setq alg (calc-encase-atoms
810 (calc-normalize (list func lhs rhs)))))
811 (setq rhs (list (if subtract '+ '-) sel alg))
813 (setq rhs (math-simplify rhs)))
814 (setq alg (calc-encase-atoms
815 (calc-normalize (list (if subtract '- '+) alg rhs)))))
816 (calc-pop-push-record-list 1 (if subtract "sub" "add")
817 (list (calc-replace-sub-formula
820 (list (and reselect alg)))))
821 (calc-handle-whys))))
823 (defun calc-sel-sub-both-sides (no-simp)
825 (calc-sel-add-both-sides no-simp t))
827 ;;; calc-sel.el ends here