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;; Calculator for GNU Emacs, part II [calcsel2.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 calcext.el.
(require 'calcext)
(require 'calcmacs)
(defun calcNeedcalcsel2 () nil)
(defun calccommuteleft (arg)
(interactive "p")
(if (< arg 0)
(calccommuteright ( arg))
(calcwrapper
(calcpreservepoint)
(let ((num (max 1 (calclocatecursorelement (point))))
(reselect calckeepselection))
(if (= arg 0) (setq arg nil))
(while (or (null arg) (>= (setq arg (1 arg)) 0))
(let* ((entry (calctop num 'entry))
(expr (car entry))
(sel (calcautoselection entry))
parent new)
(or (and sel
(consp (setq parent (calcfindassocparentformula
expr sel))))
(error "No term is selected"))
(if (and calcassocselections
(assq (car parent) calcassocops))
(let ((outer (calcfindparentformula parent sel)))
(if (eq sel (nth 2 outer))
(setq new (calcreplacesubformula
parent outer
(cond
((memq (car outer)
(nth 1 (assq (carsafe (nth 1 outer))
calcassocops)))
(let* ((other (nth 2 (nth 1 outer)))
(new (calcbuildassocterm
(car (nth 1 outer))
(calcbuildassocterm
(car outer)
(nth 1 (nth 1 outer))
sel)
other)))
(setq sel (nth 2 (nth 1 new)))
new))
((eq (car outer) ')
(calcbuildassocterm
'+
(setq sel (mathneg sel))
(nth 1 outer)))
((eq (car outer) '/)
(calcbuildassocterm
'*
(setq sel (calcFuncdiv 1 sel))
(nth 1 outer)))
(t (calcbuildassocterm
(car outer) sel (nth 1 outer))))))
(let ((next (calcfindparentformula parent outer)))
(if (not (and (consp next)
(eq outer (nth 2 next))
(eq (car next) (car outer))))
(setq new nil)
(setq new (calcbuildassocterm
(car next)
sel
(calcbuildassocterm
(car next) (nth 1 next) (nth 2 outer)))
sel (nth 1 new)
new (calcreplacesubformula
parent next new))))))
(if (eq (nth 1 parent) sel)
(setq new nil)
(let ((p (nthcdr (1 (calcfindsubformula parent sel))
(setq new (copysequence parent)))))
(setcar (cdr p) (car p))
(setcar p sel))))
(if (null new)
(if arg
(error "Term is already leftmost")
(or reselect
(calcpoppushlist 1 (list expr) num '(nil)))
(setq arg 0))
(calcpoppushrecordlist
1 "left"
(list (calcreplacesubformula expr parent new))
num
(list (and (or (not (eq arg 0)) reselect)
sel)))))))))
)
(defun calccommuteright (arg)
(interactive "p")
(if (< arg 0)
(calccommuteleft ( arg))
(calcwrapper
(calcpreservepoint)
(let ((num (max 1 (calclocatecursorelement (point))))
(reselect calckeepselection))
(if (= arg 0) (setq arg nil))
(while (or (null arg) (>= (setq arg (1 arg)) 0))
(let* ((entry (calctop num 'entry))
(expr (car entry))
(sel (calcautoselection entry))
parent new)
(or (and sel
(consp (setq parent (calcfindassocparentformula
expr sel))))
(error "No term is selected"))
(if (and calcassocselections
(assq (car parent) calcassocops))
(let ((outer (calcfindparentformula parent sel)))
(if (eq sel (nth 1 outer))
(setq new (calcreplacesubformula
parent outer
(if (memq (car outer)
(nth 2 (assq (carsafe (nth 2 outer))
calcassocops)))
(let ((other (nth 1 (nth 2 outer))))
(calcbuildassocterm
(car outer)
other
(calcbuildassocterm
(car (nth 2 outer))
sel
(nth 2 (nth 2 outer)))))
(let ((new (cond
((eq (car outer) ')
(calcbuildassocterm
'+
(mathneg (nth 2 outer))
sel))
((eq (car outer) '/)
(calcbuildassocterm
'*
(calcFuncdiv 1 (nth 2 outer))
sel))
(t (calcbuildassocterm
(car outer)
(nth 2 outer)
sel)))))
(setq sel (nth 2 new))
new))))
(let ((next (calcfindparentformula parent outer)))
(if (not (and (consp next)
(eq outer (nth 1 next))))
(setq new nil)
(setq new (calcbuildassocterm
(car outer)
(calcbuildassocterm
(car next) (nth 1 outer) (nth 2 next))
sel)
sel (nth 2 new)
new (calcreplacesubformula
parent next new))))))
(if (eq (nth (1 (length parent)) parent) sel)
(setq new nil)
(let ((p (nthcdr (calcfindsubformula parent sel)
(setq new (copysequence parent)))))
(setcar p (nth 1 p))
(setcar (cdr p) sel))))
(if (null new)
(if arg
(error "Term is already rightmost")
(or reselect
(calcpoppushlist 1 (list expr) num '(nil)))
(setq arg 0))
(calcpoppushrecordlist
1 "rght"
(list (calcreplacesubformula expr parent new))
num
(list (and (or (not (eq arg 0)) reselect)
sel)))))))))
)
(defun calcbuildassocterm (op lhs rhs)
(cond ((and (eq op '+) (or (mathlooksnegp rhs)
(and (eq (carsafe rhs) 'cplx)
(mathnegp (nth 1 rhs))
(eq (nth 2 rhs) 0))))
(list ' lhs (mathneg rhs)))
((and (eq op ') (or (mathlooksnegp rhs)
(and (eq (carsafe rhs) 'cplx)
(mathnegp (nth 1 rhs))
(eq (nth 2 rhs) 0))))
(list '+ lhs (mathneg rhs)))
((and (eq op '*) (and (eq (carsafe rhs) '/)
(or (mathequalint (nth 1 rhs) 1)
(equal (nth 1 rhs) '(cplx 1 0)))))
(list '/ lhs (nth 2 rhs)))
((and (eq op '/) (and (eq (carsafe rhs) '/)
(or (mathequalint (nth 1 rhs) 1)
(equal (nth 1 rhs) '(cplx 1 0)))))
(list '/ lhs (nth 2 rhs)))
(t (list op lhs rhs)))
)
(defun calcselunpack ()
(interactive)
(calcwrapper
(calcpreservepoint)
(let* ((num (max 1 (calclocatecursorelement (point))))
(reselect calckeepselection)
(entry (calctop num 'entry))
(expr (car entry))
(sel (or (calcautoselection entry) expr)))
(or (and (not (mathprimp sel))
(= (length sel) 2))
(error "Selection must be a function of one argument"))
(calcpoppushrecordlist 1 "unpk"
(list (calcreplacesubformula
expr sel (nth 1 sel)))
num
(list (and reselect (nth 1 sel))))))
)
(defun calcselisolate ()
(interactive)
(calcslowwrapper
(calcpreservepoint)
(let* ((num (max 1 (calclocatecursorelement (point))))
(reselect calckeepselection)
(entry (calctop num 'entry))
(expr (car entry))
(sel (or (calcautoselection entry) (error "No selection")))
(eqn sel)
soln)
(while (and (or (consp (setq eqn (calcfindparentformula expr eqn)))
(error "Selection must be a member of an equation"))
(not (assq (car eqn) calctweakeqntable))))
(setq soln (mathsolveeqn eqn sel calchyperbolicflag))
(or soln
(error "No solution found"))
(setq soln (calcencaseatoms
(if (eq (not (calcfindsubformula (nth 2 eqn) sel))
(eq (nth 1 soln) sel))
soln
(list (nth 1 (assq (car soln) calctweakeqntable))
(nth 2 soln)
(nth 1 soln)))))
(calcpoppushrecordlist 1 "isol"
(list (calcreplacesubformula
expr eqn soln))
num
(list (and reselect sel)))
(calchandlewhys)))
)
(defun calcselcommute (many)
(interactive "P")
(let ((calcassocselections nil))
(calcrewriteselection "CommuteRules" many "cmut"))
(calcsetmodeline)
)
(defun calcseljumpequals (many)
(interactive "P")
(calcrewriteselection "JumpRules" many "jump")
)
(defun calcseldistribute (many)
(interactive "P")
(calcrewriteselection "DistribRules" many "dist")
)
(defun calcselmerge (many)
(interactive "P")
(calcrewriteselection "MergeRules" many "merg")
)
(defun calcselnegate (many)
(interactive "P")
(calcrewriteselection "NegateRules" many "jneg")
)
(defun calcselinvert (many)
(interactive "P")
(calcrewriteselection "InvertRules" many "jinv")
)
