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- ;; Calculator for GNU Emacs, part II [calc-sel.el]
- ;; Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
- ;; Written by Dave Gillespie, daveg@synaptics.com.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY. No author or distributor
- ;; accepts responsibility to anyone for the consequences of using it
- ;; or for whether it serves any particular purpose or works at all,
- ;; unless he says so in writing. Refer to the GNU Emacs General Public
- ;; License for full details.
-
- ;; Everyone is granted permission to copy, modify and redistribute
- ;; GNU Emacs, but only under the conditions described in the
- ;; GNU Emacs General Public License. A copy of this license is
- ;; supposed to have been given to you along with GNU Emacs so you
- ;; can know your rights and responsibilities. It should be in a
- ;; file named COPYING. Among other things, the copyright notice
- ;; and this notice must be preserved on all copies.
-
-
-
- ;; This file is autoloaded from calc-ext.el.
- (require 'calc-ext)
-
- (require 'calc-macs)
-
- (defun calc-Need-calc-sel () nil)
-
-
- ;;; Selection commands.
-
- (defun calc-select-here (num &optional once keep)
- (interactive "P")
- (calc-wrapper
- (calc-prepare-selection)
- (let ((found (calc-find-selected-part))
- (entry calc-selection-cache-entry))
- (or (and keep (nth 2 entry))
- (progn
- (if once (progn
- (setq calc-keep-selection nil)
- (message "(Selection will apply to next command only)")))
- (calc-change-current-selection
- (if found
- (if (and num (> (setq num (prefix-numeric-value num)) 0))
- (progn
- (while (and (>= (setq num (1- num)) 0)
- (not (eq found (car entry))))
- (setq found (calc-find-assoc-parent-formula
- (car entry) found)))
- found)
- (calc-grow-assoc-formula (car entry) found))
- (car entry)))))))
- )
-
- (defun calc-select-once (num)
- (interactive "P")
- (calc-select-here num t)
- )
-
- (defun calc-select-here-maybe (num)
- (interactive "P")
- (calc-select-here num nil t)
- )
-
- (defun calc-select-once-maybe (num)
- (interactive "P")
- (calc-select-here num t t)
- )
-
- (defun calc-select-additional ()
- (interactive)
- (calc-wrapper
- (let (calc-keep-selection)
- (calc-prepare-selection))
- (let ((found (calc-find-selected-part))
- (entry calc-selection-cache-entry))
- (calc-change-current-selection
- (if found
- (let ((sel (nth 2 entry)))
- (if sel
- (progn
- (while (not (or (eq sel (car entry))
- (calc-find-sub-formula sel found)))
- (setq sel (calc-find-assoc-parent-formula
- (car entry) sel)))
- sel)
- (calc-grow-assoc-formula (car entry) found)))
- (car entry)))))
- )
-
- (defun calc-select-more (num)
- (interactive "P")
- (calc-wrapper
- (calc-prepare-selection)
- (let ((entry calc-selection-cache-entry))
- (if (nth 2 entry)
- (let ((sel (nth 2 entry)))
- (while (and (not (eq sel (car entry)))
- (>= (setq num (1- (prefix-numeric-value num))) 0))
- (setq sel (calc-find-assoc-parent-formula (car entry) sel)))
- (calc-change-current-selection sel))
- (calc-select-here num))))
- )
-
- (defun calc-select-less (num)
- (interactive "p")
- (calc-wrapper
- (calc-prepare-selection)
- (let ((found (calc-find-selected-part))
- (entry calc-selection-cache-entry))
- (calc-change-current-selection
- (and found
- (let ((sel (nth 2 entry))
- old index op)
- (while (and sel
- (not (eq sel found))
- (>= (setq num (1- num)) 0))
- (setq old sel
- index (calc-find-sub-formula sel found))
- (and (setq sel (and index (nth index old)))
- calc-assoc-selections
- (setq op (assq (car-safe sel) calc-assoc-ops))
- (memq (car old) (nth index op))
- (setq num (1+ num))))
- sel)))))
- )
-
- (defun calc-select-part (num)
- (interactive "P")
- (or num (setq num (- last-command-char ?0)))
- (calc-wrapper
- (calc-prepare-selection)
- (let ((sel (calc-find-nth-part (or (nth 2 calc-selection-cache-entry)
- (car calc-selection-cache-entry))
- num)))
- (if sel
- (calc-change-current-selection sel)
- (error "%d is not a valid sub-formula index" num))))
- )
-
- (defun calc-find-nth-part (expr num)
- (if (and calc-assoc-selections
- (assq (car-safe expr) calc-assoc-ops))
- (let (op)
- (calc-find-nth-part-rec expr))
- (if (eq (car-safe expr) 'intv)
- (and (>= num 1) (<= num 2) (nth (1+ num) expr))
- (and (not (Math-primp expr)) (>= num 1) (< num (length expr))
- (nth num expr))))
- )
-
- (defun calc-find-nth-part-rec (expr) ; uses num, op
- (or (if (and (setq op (assq (car-safe (nth 1 expr)) calc-assoc-ops))
- (memq (car expr) (nth 1 op)))
- (calc-find-nth-part-rec (nth 1 expr))
- (and (= (setq num (1- num)) 0)
- (nth 1 expr)))
- (if (and (setq op (assq (car-safe (nth 2 expr)) calc-assoc-ops))
- (memq (car expr) (nth 2 op)))
- (calc-find-nth-part-rec (nth 2 expr))
- (and (= (setq num (1- num)) 0)
- (nth 2 expr))))
- )
-
- (defun calc-select-next (num)
- (interactive "p")
- (if (< num 0)
- (calc-select-previous (- num))
- (calc-wrapper
- (calc-prepare-selection)
- (let* ((entry calc-selection-cache-entry)
- (sel (nth 2 entry)))
- (if sel
- (progn
- (while (>= (setq num (1- num)) 0)
- (let* ((parent (calc-find-parent-formula (car entry) sel))
- (p parent)
- op)
- (and (eq p t) (setq p nil))
- (while (and (setq p (cdr p))
- (not (eq (car p) sel))))
- (if (cdr p)
- (setq sel (or (and calc-assoc-selections
- (setq op (assq (car-safe (nth 1 p))
- calc-assoc-ops))
- (memq (car parent) (nth 2 op))
- (nth 1 (nth 1 p)))
- (nth 1 p)))
- (if (and calc-assoc-selections
- (setq op (assq (car-safe parent) calc-assoc-ops))
- (consp (setq p (calc-find-parent-formula
- (car entry) parent)))
- (eq (nth 1 p) parent)
- (memq (car p) (nth 1 op)))
- (setq sel (nth 2 p))
- (error "No \"next\" sub-formula")))))
- (calc-change-current-selection sel))
- (if (Math-primp (car entry))
- (calc-change-current-selection (car entry))
- (calc-select-part num))))))
- )
-
- (defun calc-select-previous (num)
- (interactive "p")
- (if (< num 0)
- (calc-select-next (- num))
- (calc-wrapper
- (calc-prepare-selection)
- (let* ((entry calc-selection-cache-entry)
- (sel (nth 2 entry)))
- (if sel
- (progn
- (while (>= (setq num (1- num)) 0)
- (let* ((parent (calc-find-parent-formula (car entry) sel))
- (p (cdr-safe parent))
- (prev nil)
- op)
- (if (eq (car-safe parent) 'intv) (setq p (cdr p)))
- (while (and (not (eq (car p) sel))
- (setq prev (car p)
- p (cdr p))))
- (if prev
- (setq sel (or (and calc-assoc-selections
- (setq op (assq (car-safe prev)
- calc-assoc-ops))
- (memq (car parent) (nth 1 op))
- (nth 2 prev))
- prev))
- (if (and calc-assoc-selections
- (setq op (assq (car-safe parent) calc-assoc-ops))
- (consp (setq p (calc-find-parent-formula
- (car entry) parent)))
- (eq (nth 2 p) parent)
- (memq (car p) (nth 2 op)))
- (setq sel (nth 1 p))
- (error "No \"previous\" sub-formula")))))
- (calc-change-current-selection sel))
- (if (Math-primp (car entry))
- (calc-change-current-selection (car entry))
- (let ((len (if (and calc-assoc-selections
- (assq (car (car entry)) calc-assoc-ops))
- (let (op (num 0))
- (calc-find-nth-part-rec (car entry))
- (- 1 num))
- (length (car entry)))))
- (calc-select-part (- len num))))))))
- )
-
- (defun calc-find-parent-formula (expr part)
- (cond ((eq expr part) t)
- ((Math-primp expr) nil)
- (t
- (let ((p expr) res)
- (while (and (setq p (cdr p))
- (not (setq res (calc-find-parent-formula
- (car p) part)))))
- (and p
- (if (eq res t) expr res)))))
- )
-
-
- (defun calc-find-assoc-parent-formula (expr part)
- (calc-grow-assoc-formula expr (calc-find-parent-formula expr part))
- )
-
- (defun calc-grow-assoc-formula (expr part)
- (if calc-assoc-selections
- (let ((op (assq (car-safe part) calc-assoc-ops)))
- (if op
- (let (new)
- (while (and (consp (setq new (calc-find-parent-formula
- expr part)))
- (memq (car new)
- (nth (calc-find-sub-formula new part) op)))
- (setq part new))))
- part)
- part)
- )
-
- (defun calc-find-sub-formula (expr part)
- (cond ((eq expr part) t)
- ((Math-primp expr) nil)
- (t
- (let ((num 1))
- (while (and (setq expr (cdr expr))
- (not (calc-find-sub-formula (car expr) part)))
- (setq num (1+ num)))
- (and expr num))))
- )
-
- (defun calc-unselect (num)
- (interactive "P")
- (calc-wrapper
- (calc-prepare-selection num)
- (calc-change-current-selection nil))
- )
-
- (defun calc-clear-selections ()
- (interactive)
- (calc-wrapper
- (let ((limit (calc-stack-size))
- (n 1))
- (while (<= n limit)
- (if (calc-top n 'sel)
- (progn
- (calc-prepare-selection n)
- (calc-change-current-selection nil)))
- (setq n (1+ n))))
- (calc-clear-command-flag 'position-point))
- )
-
- (defun calc-show-selections (arg)
- (interactive "P")
- (calc-wrapper
- (calc-preserve-point)
- (setq calc-show-selections (if arg
- (> (prefix-numeric-value arg) 0)
- (not calc-show-selections)))
- (let ((p calc-stack))
- (while (and p
- (or (null (nth 2 (car p)))
- (equal (car p) calc-selection-cache-entry)))
- (setq p (cdr p)))
- (or (and p
- (let ((calc-selection-cache-default-entry
- calc-selection-cache-entry))
- (calc-do-refresh)))
- (and calc-selection-cache-entry
- (let ((sel (nth 2 calc-selection-cache-entry)))
- (setcar (nthcdr 2 calc-selection-cache-entry) nil)
- (calc-change-current-selection sel)))))
- (message (if calc-show-selections
- "Displaying only selected part of formulas"
- "Displaying all but selected part of formulas")))
- )
-
- (defun calc-preserve-point ()
- (or (looking-at "\\.\n+\\'")
- (progn
- (setq calc-final-point-line (+ (count-lines (point-min) (point))
- (if (bolp) 1 0))
- calc-final-point-column (current-column))
- (calc-set-command-flag 'position-point)))
- )
-
- (defun calc-enable-selections (arg)
- (interactive "P")
- (calc-wrapper
- (calc-preserve-point)
- (setq calc-use-selections (if arg
- (> (prefix-numeric-value arg) 0)
- (not calc-use-selections)))
- (calc-set-command-flag 'renum-stack)
- (message (if calc-use-selections
- "Commands operate only on selected sub-formulas"
- "Selections of sub-formulas have no effect")))
- )
-
- (defun calc-break-selections (arg)
- (interactive "P")
- (calc-wrapper
- (calc-preserve-point)
- (setq calc-assoc-selections (if arg
- (<= (prefix-numeric-value arg) 0)
- (not calc-assoc-selections)))
- (message (if calc-assoc-selections
- "Selection treats a+b+c as a sum of three terms"
- "Selection treats a+b+c as (a+b)+c")))
- )
-
- (defun calc-prepare-selection (&optional num)
- (or num (setq num (calc-locate-cursor-element (point))))
- (setq calc-selection-true-num num
- calc-keep-selection t)
- (or (> num 0) (setq num 1))
- ;; (if (or (< num 1) (> num (calc-stack-size)))
- ;; (error "Cursor must be positioned on a stack element"))
- (let* ((entry (calc-top num 'entry))
- ww w)
- (or (equal entry calc-selection-cache-entry)
- (progn
- (setcar entry (calc-encase-atoms (car entry)))
- (setq calc-selection-cache-entry entry
- calc-selection-cache-num num
- calc-selection-cache-comp
- (let ((math-comp-tagged t))
- (math-compose-expr (car entry) 0))
- calc-selection-cache-offset
- (+ (car (math-stack-value-offset calc-selection-cache-comp))
- (length calc-left-label)
- (if calc-line-numbering 4 0))))))
- (calc-preserve-point)
- )
- (setq calc-selection-cache-entry nil)
-
- ;;; The following ensures that no two subformulas will be "eq" to each other!
- (defun calc-encase-atoms (x)
- (if (or (not (consp x))
- (equal x '(float 0 0)))
- (list 'cplx x 0)
- (calc-encase-atoms-rec x)
- x)
- )
-
- (defun calc-encase-atoms-rec (x)
- (or (Math-primp x)
- (progn
- (if (eq (car x) 'intv)
- (setq x (cdr x)))
- (while (setq x (cdr x))
- (if (or (not (consp (car x)))
- (equal (car x) '(float 0 0)))
- (setcar x (list 'cplx (car x) 0))
- (calc-encase-atoms-rec (car x))))))
- )
-
- (defun calc-find-selected-part ()
- (let* ((math-comp-sel-hpos (- (current-column) calc-selection-cache-offset))
- toppt
- (lcount 0)
- (spaces 0)
- (math-comp-sel-vpos (save-excursion
- (beginning-of-line)
- (let ((line (point)))
- (calc-cursor-stack-index
- calc-selection-cache-num)
- (setq toppt (point))
- (while (< (point) line)
- (forward-line 1)
- (setq spaces (+ spaces
- (current-indentation))
- lcount (1+ lcount)))
- (- lcount (math-comp-ascent
- calc-selection-cache-comp) -1))))
- (math-comp-sel-cpos (- (point) toppt calc-selection-cache-offset
- spaces lcount))
- (math-comp-sel-tag nil))
- (and (>= math-comp-sel-hpos 0)
- (> calc-selection-true-num 0)
- (math-composition-to-string calc-selection-cache-comp 1000000))
- (nth 1 math-comp-sel-tag))
- )
-
- (defun calc-change-current-selection (sub-expr)
- (or (eq sub-expr (nth 2 calc-selection-cache-entry))
- (let ((calc-prepared-composition calc-selection-cache-comp)
- (buffer-read-only nil)
- top)
- (calc-set-command-flag 'renum-stack)
- (setcar (nthcdr 2 calc-selection-cache-entry) sub-expr)
- (calc-cursor-stack-index calc-selection-cache-num)
- (setq top (point))
- (calc-cursor-stack-index (1- calc-selection-cache-num))
- (delete-region top (point))
- (let ((calc-selection-cache-default-entry calc-selection-cache-entry))
- (insert (math-format-stack-value calc-selection-cache-entry)
- "\n"))))
- )
-
- (defun calc-top-selected (&optional n m)
- (and calc-any-selections
- calc-use-selections
- (progn
- (or n (setq n 1))
- (or m (setq m 1))
- (calc-check-stack (+ n m -1))
- (let ((top (nthcdr (+ m calc-stack-top -1) calc-stack))
- (sel nil))
- (while (>= (setq n (1- n)) 0)
- (if (nth 2 (car top))
- (setq sel (if sel t (nth 2 (car top)))))
- (setq top (cdr top)))
- sel)))
- )
-
- (defun calc-replace-sub-formula (expr old new)
- (setq new (calc-encase-atoms new))
- (calc-replace-sub-formula-rec expr)
- )
-
- (defun calc-replace-sub-formula-rec (expr)
- (cond ((eq expr old) new)
- ((Math-primp expr) expr)
- (t
- (cons (car expr)
- (mapcar 'calc-replace-sub-formula-rec (cdr expr)))))
- )
-
- (defun calc-sel-error ()
- (error "Illegal operation on sub-formulas")
- )
-
- (defun calc-replace-selections (n vals m)
- (if (calc-top-selected n m)
- (let ((num (length vals)))
- (calc-preserve-point)
- (cond
- ((= n num)
- (let* ((old (calc-top-list n m 'entry))
- (new nil)
- (sel nil)
- val)
- (while old
- (if (nth 2 (car old))
- (setq val (calc-encase-atoms (car vals))
- new (cons (calc-replace-sub-formula (car (car old))
- (nth 2 (car old))
- val)
- new)
- sel (cons val sel))
- (setq new (cons (car vals) new)
- sel (cons nil sel)))
- (setq vals (cdr vals)
- old (cdr old)))
- (calc-pop-stack n m t)
- (calc-push-list (nreverse new)
- m (and calc-keep-selection (nreverse sel)))))
- ((= num 1)
- (let* ((old (calc-top-list n m 'entry))
- more)
- (while (and old (not (nth 2 (car old))))
- (setq old (cdr old)))
- (setq more old)
- (while (and (setq more (cdr more)) (not (nth 2 (car more)))))
- (and more
- (calc-sel-error))
- (calc-pop-stack n m t)
- (if old
- (let ((val (calc-encase-atoms (car vals))))
- (calc-push-list (list (calc-replace-sub-formula
- (car (car old))
- (nth 2 (car old))
- val))
- m (and calc-keep-selection (list val))))
- (calc-push-list vals))))
- (t (calc-sel-error))))
- (calc-pop-stack n m t)
- (calc-push-list vals m))
- )
- (setq calc-keep-selection t)
-
- (defun calc-delete-selection (n)
- (let ((entry (calc-top n 'entry)))
- (if (nth 2 entry)
- (if (eq (nth 2 entry) (car entry))
- (progn
- (calc-pop-stack 1 n t)
- (calc-push-list '(0) n))
- (let ((parent (calc-find-parent-formula (car entry) (nth 2 entry)))
- (repl nil))
- (calc-preserve-point)
- (calc-pop-stack 1 n t)
- (cond ((or (memq (car parent) '(* / %))
- (and (eq (car parent) '^)
- (eq (nth 2 parent) (nth 2 entry))))
- (setq repl 1))
- ((memq (car parent) '(vec calcFunc-min calcFunc-max)))
- ((and (assq (car parent) calc-tweak-eqn-table)
- (= (length parent) 3))
- (setq repl 'del))
- (t
- (setq repl 0)))
- (cond
- ((eq repl 'del)
- (calc-push-list (list
- (calc-normalize
- (calc-replace-sub-formula
- (car entry)
- parent
- (if (eq (nth 2 entry) (nth 1 parent))
- (nth 2 parent)
- (nth 1 parent)))))
- n))
- (repl
- (calc-push-list (list
- (calc-normalize
- (calc-replace-sub-formula (car entry)
- (nth 2 entry)
- repl)))
- n))
- (t
- (calc-push-list (list
- (calc-normalize
- (calc-replace-sub-formula (car entry)
- parent
- (delq (nth 2 entry)
- (copy-sequence
- parent)))))
- n)))))
- (calc-pop-stack 1 n t)))
- )
-
- (defun calc-roll-down-with-selections (n m)
- (let ((vals (append (calc-top-list m 1)
- (calc-top-list (- n m) (1+ m))))
- (sels (append (calc-top-list m 1 'sel)
- (calc-top-list (- n m) (1+ m) 'sel))))
- (calc-pop-push-list n vals 1 sels))
- )
-
- (defun calc-roll-up-with-selections (n m)
- (let ((vals (append (calc-top-list (- n m) 1)
- (calc-top-list m (- n m -1))))
- (sels (append (calc-top-list (- n m) 1 'sel)
- (calc-top-list m (- n m -1) 'sel))))
- (calc-pop-push-list n vals 1 sels))
- )
-
- (defun calc-auto-selection (entry)
- (or (nth 2 entry)
- (progn
- (and (boundp 'reselect) (setq reselect nil))
- (calc-prepare-selection)
- (calc-grow-assoc-formula (car entry) (calc-find-selected-part))))
- )
-
- (defun calc-copy-selection ()
- (interactive)
- (calc-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (entry (calc-top num 'entry)))
- (calc-push (or (calc-auto-selection entry) (car entry)))))
- )
-
- (defun calc-del-selection ()
- (interactive)
- (calc-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (entry (calc-top num 'entry))
- (sel (calc-auto-selection entry)))
- (setcar (nthcdr 2 entry) (and (not (eq sel (car entry))) sel))
- (calc-delete-selection num)))
- )
-
- (defun calc-enter-selection ()
- (interactive)
- (calc-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (reselect calc-keep-selection)
- (entry (calc-top num 'entry))
- (expr (car entry))
- (sel (or (calc-auto-selection entry) expr))
- alg)
- (let ((calc-dollar-values (list sel))
- (calc-dollar-used 0))
- (setq alg (calc-do-alg-entry "" "Replace selection with: "))
- (and alg
- (progn
- (setq alg (calc-encase-atoms (car alg)))
- (calc-pop-push-record-list 1 "repl"
- (list (calc-replace-sub-formula
- expr sel alg))
- num
- (list (and reselect alg))))))
- (calc-handle-whys)))
- )
-
- (defun calc-edit-selection ()
- (interactive)
- (calc-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (reselect calc-keep-selection)
- (entry (calc-top num 'entry))
- (expr (car entry))
- (sel (or (calc-auto-selection entry) expr))
- alg)
- (let ((str (math-showing-full-precision
- (math-format-nice-expr sel (screen-width)))))
- (calc-edit-mode (list 'calc-finish-selection-edit
- num (list 'quote sel) reselect))
- (insert str "\n"))))
- (calc-show-edit-buffer)
- )
-
- (defun calc-finish-selection-edit (num sel reselect)
- (let ((buf (current-buffer))
- (str (buffer-substring (point) (point-max)))
- (start (point)))
- (switch-to-buffer calc-original-buffer)
- (let ((val (math-read-expr str)))
- (if (eq (car-safe val) 'error)
- (progn
- (switch-to-buffer buf)
- (goto-char (+ start (nth 1 val)))
- (error (nth 2 val))))
- (calc-wrapper
- (calc-preserve-point)
- (if disp-trail
- (calc-trail-display 1 t))
- (setq val (calc-encase-atoms (calc-normalize val)))
- (let ((expr (calc-top num 'full)))
- (if (calc-find-sub-formula expr sel)
- (calc-pop-push-record-list 1 "edit"
- (list (calc-replace-sub-formula
- expr sel val))
- num
- (list (and reselect val)))
- (calc-push val)
- (error "Original selection has been lost"))))))
- )
-
- (defun calc-sel-evaluate (arg)
- (interactive "p")
- (calc-slow-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (reselect calc-keep-selection)
- (entry (calc-top num 'entry))
- (sel (or (calc-auto-selection entry) (car entry))))
- (calc-with-default-simplification
- (let ((math-simplify-only nil))
- (calc-modify-simplify-mode arg)
- (let ((val (calc-encase-atoms (calc-normalize sel))))
- (calc-pop-push-record-list 1 "jsmp"
- (list (calc-replace-sub-formula
- (car entry) sel val))
- num
- (list (and reselect val))))))
- (calc-handle-whys)))
- )
-
- (defun calc-sel-expand-formula (arg)
- (interactive "p")
- (calc-slow-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (reselect calc-keep-selection)
- (entry (calc-top num 'entry))
- (sel (or (calc-auto-selection entry) (car entry))))
- (calc-with-default-simplification
- (let ((math-simplify-only nil))
- (calc-modify-simplify-mode arg)
- (let* ((math-expand-formulas (> arg 0))
- (val (calc-normalize sel))
- top)
- (and (<= arg 0)
- (setq top (math-expand-formula val))
- (setq val (calc-normalize top)))
- (setq val (calc-encase-atoms val))
- (calc-pop-push-record-list 1 "jexf"
- (list (calc-replace-sub-formula
- (car entry) sel val))
- num
- (list (and reselect val))))))
- (calc-handle-whys)))
- )
-
- (defun calc-sel-mult-both-sides (no-simp &optional divide)
- (interactive "P")
- (calc-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (reselect calc-keep-selection)
- (entry (calc-top num 'entry))
- (expr (car entry))
- (sel (or (calc-auto-selection entry) expr))
- (func (car-safe sel))
- alg lhs rhs)
- (setq alg (calc-with-default-simplification
- (car (calc-do-alg-entry ""
- (if divide
- "Divide both sides by: "
- "Multiply both sides by: ")))))
- (and alg
- (progn
- (if (and (or (eq func '/)
- (assq func calc-tweak-eqn-table))
- (= (length sel) 3))
- (progn
- (or (memq func '(/ calcFunc-eq calcFunc-neq))
- (if (math-known-nonposp alg)
- (progn
- (setq func (nth 1 (assq func
- calc-tweak-eqn-table)))
- (or (math-known-negp alg)
- (message "Assuming this factor is nonzero")))
- (or (math-known-posp alg)
- (if (math-known-nonnegp alg)
- (message "Assuming this factor is nonzero")
- (message "Assuming this factor is positive")))))
- (setq lhs (list (if divide '/ '*) (nth 1 sel) alg)
- rhs (list (if divide '/ '*) (nth 2 sel) alg))
- (or no-simp
- (progn
- (setq lhs (math-simplify lhs)
- rhs (math-simplify rhs))
- (and (eq func '/)
- (or (Math-equal (nth 1 sel) 1)
- (Math-equal (nth 1 sel) -1)
- (and (memq (car-safe (nth 2 sel)) '(+ -))
- (memq (car-safe alg) '(+ -))))
- (setq rhs (math-expand-term rhs)))))
- (setq alg (calc-encase-atoms
- (calc-normalize (list func lhs rhs)))))
- (setq rhs (list (if divide '* '/) sel alg))
- (or no-simp
- (setq rhs (math-simplify rhs)))
- (setq alg (calc-encase-atoms
- (calc-normalize (if divide
- (list '/ rhs alg)
- (list '* alg rhs))))))
- (calc-pop-push-record-list 1 (if divide "div" "mult")
- (list (calc-replace-sub-formula
- expr sel alg))
- num
- (list (and reselect alg)))))
- (calc-handle-whys)))
- )
-
- (defun calc-sel-div-both-sides (no-simp)
- (interactive "P")
- (calc-sel-mult-both-sides no-simp t)
- )
-
- (defun calc-sel-add-both-sides (no-simp &optional subtract)
- (interactive "P")
- (calc-wrapper
- (calc-preserve-point)
- (let* ((num (max 1 (calc-locate-cursor-element (point))))
- (reselect calc-keep-selection)
- (entry (calc-top num 'entry))
- (expr (car entry))
- (sel (or (calc-auto-selection entry) expr))
- (func (car-safe sel))
- alg lhs rhs)
- (setq alg (calc-with-default-simplification
- (car (calc-do-alg-entry ""
- (if subtract
- "Subtract from both sides: "
- "Add to both sides: ")))))
- (and alg
- (progn
- (if (and (assq func calc-tweak-eqn-table)
- (= (length sel) 3))
- (progn
- (setq lhs (list (if subtract '- '+) (nth 1 sel) alg)
- rhs (list (if subtract '- '+) (nth 2 sel) alg))
- (or no-simp
- (setq lhs (math-simplify lhs)
- rhs (math-simplify rhs)))
- (setq alg (calc-encase-atoms
- (calc-normalize (list func lhs rhs)))))
- (setq rhs (list (if subtract '+ '-) sel alg))
- (or no-simp
- (setq rhs (math-simplify rhs)))
- (setq alg (calc-encase-atoms
- (calc-normalize (list (if subtract '- '+) alg rhs)))))
- (calc-pop-push-record-list 1 (if subtract "sub" "add")
- (list (calc-replace-sub-formula
- expr sel alg))
- num
- (list (and reselect alg)))))
- (calc-handle-whys)))
- )
-
- (defun calc-sel-sub-both-sides (no-simp)
- (interactive "P")
- (calc-sel-add-both-sides no-simp t)
- )
-
-