1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
|
;;; calcsel2.el --- selection functions for Calc -*- lexical-binding:t -*-
;; Copyright (C) 1990-1993, 2001-2025 Free Software Foundation, Inc.
;; Author: David Gillespie <daveg@synaptics.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 of the License, 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. If not, see <https://www.gnu.org/licenses/>.
;;; 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.
(defvar calc-sel-reselect)
(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)
;;; calcsel2.el ends here
|
