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;;; calcsel2.el --- selection functions for Calc
;; Copyright (C) 1990, 1991, 1992, 1993, 2001, 2002, 2003, 2004,
;; 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
;; Author: David Gillespie <daveg@synaptics.com>
;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
;; This file is part of GNU Emacs.
;; GNU Emacs is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3, or (at your option)
;; any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;; Boston, MA 02110-1301, USA.
;;; Commentary:
;;; Code:
;; This file is autoloaded from calc-ext.el.
(require 'calc-ext)
(require 'calc-macs)
;; The variable calc-keep-selection is declared and set in calc-sel.el.
(defvar calc-keep-selection)
;; The variable calc-sel-reselect is local to the methods below,
;; but is used by some functions in calc-sel.el which are called
;; by the functions below.
(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))))
(calc-sel-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 calc-sel-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)) calc-sel-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))))
(calc-sel-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 calc-sel-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)) calc-sel-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))))
(calc-sel-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 calc-sel-reselect (nth 1 sel)))))))
(defun calc-sel-isolate ()
(interactive)
(calc-slow-wrapper
(calc-preserve-point)
(let* ((num (max 1 (calc-locate-cursor-element (point))))
(calc-sel-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 calc-sel-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"))
(provide 'calcsel2)
;;; arch-tag: 7c5b8d65-b8f0-45d9-820d-9930f8ee114b
;;; calcsel2.el ends here
|
