[bpt/emacs.git] / lisp / calc / calcsel2.el

;;; calcsel2.el --- selection functions for Calc

;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.

;; Author: David Gillespie <daveg@synaptics.com>
;; Maintainers: D. Goel <deego@gnufans.org>
;;              Colin Walters <walters@debian.org>

;; 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.

;;; Commentary:

;;; Code:

;; This file is autoloaded from calc-ext.el.
(require 'calc-ext)

(require 'calc-macs)

(defun calc-Need-calc-sel-2 () nil)


(defun calc-commute-left (arg)
  (interactive "p")
  (if (< arg 0)
      (calc-commute-right (- arg))
    (calc-wrapper
     (calc-preserve-point)
     (let ((num (max 1 (calc-locate-cursor-element (point))))
	   (reselect calc-keep-selection))
       (if (= arg 0) (setq arg nil))
       (while (or (null arg) (>= (setq arg (1- arg)) 0))
	 (let* ((entry (calc-top num 'entry))
		(expr (car entry))
		(sel (calc-auto-selection entry))
		parent new)
	   (or (and sel
		    (consp (setq parent (calc-find-assoc-parent-formula
					 expr sel))))
	       (error "No term is selected"))
	   (if (and calc-assoc-selections
		    (assq (car parent) calc-assoc-ops))
	       (let ((outer (calc-find-parent-formula parent sel)))
		 (if (eq sel (nth 2 outer))
		     (setq new (calc-replace-sub-formula
				parent outer
				(cond
				 ((memq (car outer)
					(nth 1 (assq (car-safe (nth 1 outer))
						     calc-assoc-ops)))
				  (let* ((other (nth 2 (nth 1 outer)))
					 (new (calc-build-assoc-term
					       (car (nth 1 outer))
					       (calc-build-assoc-term
						(car outer)
						(nth 1 (nth 1 outer))
						sel)
					       other)))
				    (setq sel (nth 2 (nth 1 new)))
				    new))
				 ((eq (car outer) '-)
				  (calc-build-assoc-term
				   '+
				   (setq sel (math-neg sel))
				   (nth 1 outer)))
				 ((eq (car outer) '/)
				  (calc-build-assoc-term
				   '*
				   (setq sel (calcFunc-div 1 sel))
				   (nth 1 outer)))
				 (t (calc-build-assoc-term
				     (car outer) sel (nth 1 outer))))))
		   (let ((next (calc-find-parent-formula parent outer)))
		     (if (not (and (consp next)
				   (eq outer (nth 2 next))
				   (eq (car next) (car outer))))
			 (setq new nil)
		       (setq new (calc-build-assoc-term
				  (car next)
				  sel
				  (calc-build-assoc-term
				   (car next) (nth 1 next) (nth 2 outer)))
			     sel (nth 1 new)
			     new (calc-replace-sub-formula
				  parent next new))))))
	     (if (eq (nth 1 parent) sel)
		 (setq new nil)
	       (let ((p (nthcdr (1- (calc-find-sub-formula parent sel))
				(setq new (copy-sequence parent)))))
		 (setcar (cdr p) (car p))
		 (setcar p sel))))
	   (if (null new)
	       (if arg
		   (error "Term is already leftmost")
		 (or reselect
		     (calc-pop-push-list 1 (list expr) num '(nil)))
		 (setq arg 0))
	     (calc-pop-push-record-list
	      1 "left"
	      (list (calc-replace-sub-formula expr parent new))
	      num
	      (list (and (or (not (eq arg 0)) reselect)
			 sel))))))))))

(defun calc-commute-right (arg)
  (interactive "p")
  (if (< arg 0)
      (calc-commute-left (- arg))
    (calc-wrapper
     (calc-preserve-point)
     (let ((num (max 1 (calc-locate-cursor-element (point))))
	   (reselect calc-keep-selection))
       (if (= arg 0) (setq arg nil))
       (while (or (null arg) (>= (setq arg (1- arg)) 0))
	 (let* ((entry (calc-top num 'entry))
		(expr (car entry))
		(sel (calc-auto-selection entry))
		parent new)
	   (or (and sel
		    (consp (setq parent (calc-find-assoc-parent-formula
					 expr sel))))
	       (error "No term is selected"))
	   (if (and calc-assoc-selections
		    (assq (car parent) calc-assoc-ops))
	       (let ((outer (calc-find-parent-formula parent sel)))
		 (if (eq sel (nth 1 outer))
		     (setq new (calc-replace-sub-formula
				parent outer
				(if (memq (car outer)
					  (nth 2 (assq (car-safe (nth 2 outer))
						       calc-assoc-ops)))
				    (let ((other (nth 1 (nth 2 outer))))
				      (calc-build-assoc-term
				       (car outer)
				       other
				       (calc-build-assoc-term
					(car (nth 2 outer))
					sel
					(nth 2 (nth 2 outer)))))
				  (let ((new (cond
					      ((eq (car outer) '-)
					       (calc-build-assoc-term
						'+
						(math-neg (nth 2 outer))
						sel))
					      ((eq (car outer) '/)
					       (calc-build-assoc-term
						'*
						(calcFunc-div 1 (nth 2 outer))
						sel))
					      (t (calc-build-assoc-term
						  (car outer)
						  (nth 2 outer)
						  sel)))))
				    (setq sel (nth 2 new))
				    new))))
		   (let ((next (calc-find-parent-formula parent outer)))
		     (if (not (and (consp next)
				   (eq outer (nth 1 next))))
			 (setq new nil)
		       (setq new (calc-build-assoc-term
				  (car outer)
				  (calc-build-assoc-term
				   (car next) (nth 1 outer) (nth 2 next))
				  sel)
			     sel (nth 2 new)
			     new (calc-replace-sub-formula
				  parent next new))))))
	     (if (eq (nth (1- (length parent)) parent) sel)
		 (setq new nil)
	       (let ((p (nthcdr (calc-find-sub-formula parent sel)
				(setq new (copy-sequence parent)))))
		 (setcar p (nth 1 p))
		 (setcar (cdr p) sel))))
	   (if (null new)
	       (if arg
		   (error "Term is already rightmost")
		 (or reselect
		     (calc-pop-push-list 1 (list expr) num '(nil)))
		 (setq arg 0))
	     (calc-pop-push-record-list
	      1 "rght"
	      (list (calc-replace-sub-formula expr parent new))
	      num
	      (list (and (or (not (eq arg 0)) reselect)
			 sel))))))))))

(defun calc-build-assoc-term (op lhs rhs)
  (cond ((and (eq op '+) (or (math-looks-negp rhs)
			     (and (eq (car-safe rhs) 'cplx)
				  (math-negp (nth 1 rhs))
				  (eq (nth 2 rhs) 0))))
	 (list '- lhs (math-neg rhs)))
	((and (eq op '-) (or (math-looks-negp rhs)
			     (and (eq (car-safe rhs) 'cplx)
				  (math-negp (nth 1 rhs))
				  (eq (nth 2 rhs) 0))))
	 (list '+ lhs (math-neg rhs)))
	((and (eq op '*) (and (eq (car-safe rhs) '/)
			      (or (math-equal-int (nth 1 rhs) 1)
				  (equal (nth 1 rhs) '(cplx 1 0)))))
	 (list '/ lhs (nth 2 rhs)))
	((and (eq op '/) (and (eq (car-safe rhs) '/)
			      (or (math-equal-int (nth 1 rhs) 1)
				  (equal (nth 1 rhs) '(cplx 1 0)))))
	 (list '/ lhs (nth 2 rhs)))
	(t (list op lhs rhs))))

(defun calc-sel-unpack ()
  (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)))
     (or (and (not (math-primp sel))
	      (= (length sel) 2))
	 (error "Selection must be a function of one argument"))
     (calc-pop-push-record-list 1 "unpk"
				(list (calc-replace-sub-formula
				       expr sel (nth 1 sel)))
				num
				(list (and reselect (nth 1 sel)))))))

(defun calc-sel-isolate ()
  (interactive)
  (calc-slow-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) (error "No selection")))
	  (eqn sel)
	  soln)
     (while (and (or (consp (setq eqn (calc-find-parent-formula expr eqn)))
		     (error "Selection must be a member of an equation"))
		 (not (assq (car eqn) calc-tweak-eqn-table))))
     (setq soln (math-solve-eqn eqn sel calc-hyperbolic-flag))
     (or soln
	 (error "No solution found"))
     (setq soln (calc-encase-atoms
		 (if (eq (not (calc-find-sub-formula (nth 2 eqn) sel))
			 (eq (nth 1 soln) sel))
		     soln
		   (list (nth 1 (assq (car soln) calc-tweak-eqn-table))
			 (nth 2 soln)
			 (nth 1 soln)))))
     (calc-pop-push-record-list 1 "isol"
				(list (calc-replace-sub-formula
				       expr eqn soln))
				num
				(list (and reselect sel)))
     (calc-handle-whys))))

(defun calc-sel-commute (many)
  (interactive "P")
  (let ((calc-assoc-selections nil))
    (calc-rewrite-selection "CommuteRules" many "cmut"))
  (calc-set-mode-line))

(defun calc-sel-jump-equals (many)
  (interactive "P")
  (calc-rewrite-selection "JumpRules" many "jump"))

(defun calc-sel-distribute (many)
  (interactive "P")
  (calc-rewrite-selection "DistribRules" many "dist"))

(defun calc-sel-merge (many)
  (interactive "P")
  (calc-rewrite-selection "MergeRules" many "merg"))

(defun calc-sel-negate (many)
  (interactive "P")
  (calc-rewrite-selection "NegateRules" many "jneg"))

(defun calc-sel-invert (many)
  (interactive "P")
  (calc-rewrite-selection "InvertRules" many "jinv"))

;;; arch-tag: 7c5b8d65-b8f0-45d9-820d-9930f8ee114b
;;; calcsel2.el ends here
Commit	Line	Data
3132f345 CW	1	;;; calcsel2.el --- selection functions for Calc
3132f345 CW	2
bf77c646	3	;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.
3132f345 CW	4
3132f345 CW	5	;; Author: David Gillespie <daveg@synaptics.com>
a1506d29	6	;; Maintainers: D. Goel <deego@gnufans.org>
6e1c888a	7	;; Colin Walters <walters@debian.org>
136211a9 EZ	8
	9	;; This file is part of GNU Emacs.
	10
	11	;; GNU Emacs is distributed in the hope that it will be useful,
	12	;; but WITHOUT ANY WARRANTY. No author or distributor
	13	;; accepts responsibility to anyone for the consequences of using it
	14	;; or for whether it serves any particular purpose or works at all,
	15	;; unless he says so in writing. Refer to the GNU Emacs General Public
	16	;; License for full details.
	17
	18	;; Everyone is granted permission to copy, modify and redistribute
	19	;; GNU Emacs, but only under the conditions described in the
	20	;; GNU Emacs General Public License. A copy of this license is
	21	;; supposed to have been given to you along with GNU Emacs so you
	22	;; can know your rights and responsibilities. It should be in a
	23	;; file named COPYING. Among other things, the copyright notice
	24	;; and this notice must be preserved on all copies.
	25
3132f345	26	;;; Commentary:
136211a9	27
3132f345	28	;;; Code:
136211a9 EZ	29
	30	;; This file is autoloaded from calc-ext.el.
	31	(require 'calc-ext)
	32
	33	(require 'calc-macs)
	34
	35	(defun calc-Need-calc-sel-2 () nil)
	36
	37
	38	(defun calc-commute-left (arg)
	39	(interactive "p")
	40	(if (< arg 0)
	41	(calc-commute-right (- arg))
	42	(calc-wrapper
	43	(calc-preserve-point)
	44	(let ((num (max 1 (calc-locate-cursor-element (point))))
	45	(reselect calc-keep-selection))
	46	(if (= arg 0) (setq arg nil))
	47	(while (or (null arg) (>= (setq arg (1- arg)) 0))
	48	(let* ((entry (calc-top num 'entry))
	49	(expr (car entry))
	50	(sel (calc-auto-selection entry))
	51	parent new)
	52	(or (and sel
	53	(consp (setq parent (calc-find-assoc-parent-formula
	54	expr sel))))
	55	(error "No term is selected"))
	56	(if (and calc-assoc-selections
	57	(assq (car parent) calc-assoc-ops))
	58	(let ((outer (calc-find-parent-formula parent sel)))
	59	(if (eq sel (nth 2 outer))
	60	(setq new (calc-replace-sub-formula
	61	parent outer
	62	(cond
	63	((memq (car outer)
	64	(nth 1 (assq (car-safe (nth 1 outer))
	65	calc-assoc-ops)))
	66	(let* ((other (nth 2 (nth 1 outer)))
	67	(new (calc-build-assoc-term
	68	(car (nth 1 outer))
	69	(calc-build-assoc-term
	70	(car outer)
	71	(nth 1 (nth 1 outer))
	72	sel)
	73	other)))
	74	(setq sel (nth 2 (nth 1 new)))
	75	new))
	76	((eq (car outer) '-)
	77	(calc-build-assoc-term
	78	'+
	79	(setq sel (math-neg sel))
	80	(nth 1 outer)))
	81	((eq (car outer) '/)
	82	(calc-build-assoc-term
	83	'*
	84	(setq sel (calcFunc-div 1 sel))
	85	(nth 1 outer)))
	86	(t (calc-build-assoc-term
	87	(car outer) sel (nth 1 outer))))))
	88	(let ((next (calc-find-parent-formula parent outer)))
	89	(if (not (and (consp next)
	90	(eq outer (nth 2 next))
	91	(eq (car next) (car outer))))
	92	(setq new nil)
93	(setq new (calc-build-assoc-term
94	(car next)
95	sel
96	(calc-build-assoc-term
97	(car next) (nth 1 next) (nth 2 outer)))
98	sel (nth 1 new)
99	new (calc-replace-sub-formula
100	parent next new))))))
101	(if (eq (nth 1 parent) sel)
102	(setq new nil)
103	(let ((p (nthcdr (1- (calc-find-sub-formula parent sel))
104	(setq new (copy-sequence parent)))))
105	(setcar (cdr p) (car p))
106	(setcar p sel))))
107	(if (null new)
108	(if arg
109	(error "Term is already leftmost")
110	(or reselect
111	(calc-pop-push-list 1 (list expr) num '(nil)))
112	(setq arg 0))
113	(calc-pop-push-record-list
114	1 "left"
115	(list (calc-replace-sub-formula expr parent new))
116	num
117	(list (and (or (not (eq arg 0)) reselect)
bf77c646	118	sel))))))))))
136211a9 EZ	119
	120	(defun calc-commute-right (arg)
	121	(interactive "p")
	122	(if (< arg 0)
	123	(calc-commute-left (- arg))
	124	(calc-wrapper
	125	(calc-preserve-point)
	126	(let ((num (max 1 (calc-locate-cursor-element (point))))
	127	(reselect calc-keep-selection))
	128	(if (= arg 0) (setq arg nil))
	129	(while (or (null arg) (>= (setq arg (1- arg)) 0))
	130	(let* ((entry (calc-top num 'entry))
	131	(expr (car entry))
	132	(sel (calc-auto-selection entry))
	133	parent new)
	134	(or (and sel
	135	(consp (setq parent (calc-find-assoc-parent-formula
	136	expr sel))))
	137	(error "No term is selected"))
	138	(if (and calc-assoc-selections
	139	(assq (car parent) calc-assoc-ops))
	140	(let ((outer (calc-find-parent-formula parent sel)))
	141	(if (eq sel (nth 1 outer))
	142	(setq new (calc-replace-sub-formula
	143	parent outer
	144	(if (memq (car outer)
	145	(nth 2 (assq (car-safe (nth 2 outer))
	146	calc-assoc-ops)))
	147	(let ((other (nth 1 (nth 2 outer))))
	148	(calc-build-assoc-term
	149	(car outer)
	150	other
	151	(calc-build-assoc-term
	152	(car (nth 2 outer))
	153	sel
	154	(nth 2 (nth 2 outer)))))
	155	(let ((new (cond
	156	((eq (car outer) '-)
	157	(calc-build-assoc-term
	158	'+
	159	(math-neg (nth 2 outer))
	160	sel))
	161	((eq (car outer) '/)
	162	(calc-build-assoc-term
	163	'*
	164	(calcFunc-div 1 (nth 2 outer))
	165	sel))
	166	(t (calc-build-assoc-term
	167	(car outer)
	168	(nth 2 outer)
	169	sel)))))
	170	(setq sel (nth 2 new))
	171	new))))
	172	(let ((next (calc-find-parent-formula parent outer)))
	173	(if (not (and (consp next)
	174	(eq outer (nth 1 next))))
	175	(setq new nil)
	176	(setq new (calc-build-assoc-term
	177	(car outer)
	178	(calc-build-assoc-term
	179	(car next) (nth 1 outer) (nth 2 next))
	180	sel)
	181	sel (nth 2 new)
	182	new (calc-replace-sub-formula
183	parent next new))))))
184	(if (eq (nth (1- (length parent)) parent) sel)
185	(setq new nil)
186	(let ((p (nthcdr (calc-find-sub-formula parent sel)
187	(setq new (copy-sequence parent)))))
188	(setcar p (nth 1 p))
189	(setcar (cdr p) sel))))
190	(if (null new)
191	(if arg
192	(error "Term is already rightmost")
193	(or reselect
194	(calc-pop-push-list 1 (list expr) num '(nil)))
195	(setq arg 0))
196	(calc-pop-push-record-list
197	1 "rght"
198	(list (calc-replace-sub-formula expr parent new))
199	num
200	(list (and (or (not (eq arg 0)) reselect)
bf77c646	201	sel))))))))))
136211a9 EZ	202
	203	(defun calc-build-assoc-term (op lhs rhs)
	204	(cond ((and (eq op '+) (or (math-looks-negp rhs)
	205	(and (eq (car-safe rhs) 'cplx)
	206	(math-negp (nth 1 rhs))
	207	(eq (nth 2 rhs) 0))))
	208	(list '- lhs (math-neg rhs)))
	209	((and (eq op '-) (or (math-looks-negp rhs)
	210	(and (eq (car-safe rhs) 'cplx)
	211	(math-negp (nth 1 rhs))
	212	(eq (nth 2 rhs) 0))))
	213	(list '+ lhs (math-neg rhs)))
	214	((and (eq op '*) (and (eq (car-safe rhs) '/)
	215	(or (math-equal-int (nth 1 rhs) 1)
	216	(equal (nth 1 rhs) '(cplx 1 0)))))
	217	(list '/ lhs (nth 2 rhs)))
	218	((and (eq op '/) (and (eq (car-safe rhs) '/)
	219	(or (math-equal-int (nth 1 rhs) 1)
	220	(equal (nth 1 rhs) '(cplx 1 0)))))
	221	(list '/ lhs (nth 2 rhs)))
bf77c646	222	(t (list op lhs rhs))))
136211a9 EZ	223
	224	(defun calc-sel-unpack ()
	225	(interactive)
	226	(calc-wrapper
	227	(calc-preserve-point)
	228	(let* ((num (max 1 (calc-locate-cursor-element (point))))
	229	(reselect calc-keep-selection)
	230	(entry (calc-top num 'entry))
	231	(expr (car entry))
	232	(sel (or (calc-auto-selection entry) expr)))
	233	(or (and (not (math-primp sel))
	234	(= (length sel) 2))
	235	(error "Selection must be a function of one argument"))
	236	(calc-pop-push-record-list 1 "unpk"
	237	(list (calc-replace-sub-formula
	238	expr sel (nth 1 sel)))
	239	num
bf77c646	240	(list (and reselect (nth 1 sel)))))))
136211a9 EZ	241
	242	(defun calc-sel-isolate ()
	243	(interactive)
	244	(calc-slow-wrapper
	245	(calc-preserve-point)
	246	(let* ((num (max 1 (calc-locate-cursor-element (point))))
	247	(reselect calc-keep-selection)
	248	(entry (calc-top num 'entry))
	249	(expr (car entry))
	250	(sel (or (calc-auto-selection entry) (error "No selection")))
	251	(eqn sel)
	252	soln)
	253	(while (and (or (consp (setq eqn (calc-find-parent-formula expr eqn)))
	254	(error "Selection must be a member of an equation"))
	255	(not (assq (car eqn) calc-tweak-eqn-table))))
	256	(setq soln (math-solve-eqn eqn sel calc-hyperbolic-flag))
	257	(or soln
	258	(error "No solution found"))
	259	(setq soln (calc-encase-atoms
	260	(if (eq (not (calc-find-sub-formula (nth 2 eqn) sel))
	261	(eq (nth 1 soln) sel))
	262	soln
	263	(list (nth 1 (assq (car soln) calc-tweak-eqn-table))
	264	(nth 2 soln)
	265	(nth 1 soln)))))
	266	(calc-pop-push-record-list 1 "isol"
	267	(list (calc-replace-sub-formula
	268	expr eqn soln))
	269	num
	270	(list (and reselect sel)))
bf77c646	271	(calc-handle-whys))))
136211a9 EZ	272
	273	(defun calc-sel-commute (many)
	274	(interactive "P")
	275	(let ((calc-assoc-selections nil))
	276	(calc-rewrite-selection "CommuteRules" many "cmut"))
bf77c646	277	(calc-set-mode-line))
136211a9 EZ	278
	279	(defun calc-sel-jump-equals (many)
	280	(interactive "P")
bf77c646	281	(calc-rewrite-selection "JumpRules" many "jump"))
136211a9 EZ	282
	283	(defun calc-sel-distribute (many)
	284	(interactive "P")
bf77c646	285	(calc-rewrite-selection "DistribRules" many "dist"))
136211a9 EZ	286
	287	(defun calc-sel-merge (many)
	288	(interactive "P")
bf77c646	289	(calc-rewrite-selection "MergeRules" many "merg"))
136211a9 EZ	290
	291	(defun calc-sel-negate (many)
	292	(interactive "P")
bf77c646	293	(calc-rewrite-selection "NegateRules" many "jneg"))
136211a9 EZ	294
	295	(defun calc-sel-invert (many)
	296	(interactive "P")
bf77c646	297	(calc-rewrite-selection "InvertRules" many "jinv"))
136211a9	298
6b61353c	299	;;; arch-tag: 7c5b8d65-b8f0-45d9-820d-9930f8ee114b
bf77c646	300	;;; calcsel2.el ends here