1;;; calc-yank.el --- kill-ring functionality for Calc
2
3;; Copyright (C) 1990, 1991, 1992, 1993, 2001, 2002, 2003, 2004,
4;;   2005, 2006, 2007 Free Software Foundation, Inc.
5
6;; Author: David Gillespie <daveg@synaptics.com>
7;; Maintainer: Jay Belanger <jay.p.belanger@gmail.com>
8
9;; This file is part of GNU Emacs.
10
11;; GNU Emacs is free software; you can redistribute it and/or modify
12;; it under the terms of the GNU General Public License as published by
13;; the Free Software Foundation; either version 2, or (at your option)
14;; any later version.
15
16;; GNU Emacs is distributed in the hope that it will be useful,
17;; but WITHOUT ANY WARRANTY; without even the implied warranty of
18;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
19;; GNU General Public License for more details.
20
21;; You should have received a copy of the GNU General Public License
22;; along with GNU Emacs; see the file COPYING.  If not, write to the
23;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24;; Boston, MA 02110-1301, USA.
25
26;;; Commentary:
27
28;;; Code:
29
30;; This file is autoloaded from calc-ext.el.
31
32(require 'calc-ext)
33(require 'calc-macs)
34
35;;; Kill ring commands.
36
37(defun calc-kill (nn &optional no-delete)
38  (interactive "P")
39  (if (eq major-mode 'calc-mode)
40      (calc-wrapper
41       (calc-force-refresh)
42       (calc-set-command-flag 'no-align)
43       (let ((num (max (calc-locate-cursor-element (point)) 1))
44	     (n (prefix-numeric-value nn)))
45	 (if (< n 0)
46	     (progn
47	       (if (eobp)
48		   (setq num (1- num)))
49	       (setq num (- num n)
50		     n (- n))))
51	 (let ((stuff (calc-top-list n (- num n -1))))
52	   (calc-cursor-stack-index num)
53	   (let ((first (point)))
54	     (calc-cursor-stack-index (- num n))
55	     (if (null nn)
56		 (backward-char 1))   ; don't include newline for raw C-k
57	     (copy-region-as-kill first (point))
58	     (if (not no-delete)
59		 (calc-pop-stack n (- num n -1))))
60	   (setq calc-last-kill (cons (car kill-ring) stuff)))))
61    (kill-line nn)))
62
63(defun calc-force-refresh ()
64  (if (or calc-executing-macro calc-display-dirty)
65      (let ((calc-executing-macro nil))
66	(calc-refresh))))
67
68(defun calc-locate-cursor-element (pt)
69  (save-excursion
70    (goto-char (point-max))
71    (calc-locate-cursor-scan (- calc-stack-top) calc-stack pt)))
72
73(defun calc-locate-cursor-scan (n stack pt)
74  (if (or (<= (point) pt)
75	  (null stack))
76      n
77    (forward-line (- (nth 1 (car stack))))
78    (calc-locate-cursor-scan (1+ n) (cdr stack) pt)))
79
80(defun calc-kill-region (top bot &optional no-delete)
81  (interactive "r")
82  (if (eq major-mode 'calc-mode)
83      (calc-wrapper
84       (calc-force-refresh)
85       (calc-set-command-flag 'no-align)
86       (let* ((top-num (calc-locate-cursor-element top))
87	      (bot-num (calc-locate-cursor-element (1- bot)))
88	      (num (- top-num bot-num -1)))
89	 (copy-region-as-kill top bot)
90	 (setq calc-last-kill (cons (car kill-ring)
91				    (calc-top-list num bot-num)))
92	 (if (not no-delete)
93	     (calc-pop-stack num bot-num))))
94    (if no-delete
95	(copy-region-as-kill top bot)
96      (kill-region top bot))))
97
98(defun calc-copy-as-kill (n)
99  (interactive "P")
100  (calc-kill n t))
101
102(defun calc-copy-region-as-kill (top bot)
103  (interactive "r")
104  (calc-kill-region top bot t))
105
106;;; This function uses calc-last-kill if possible to get an exact result,
107;;; otherwise it just parses the yanked string.
108;;; Modified to use Emacs 19 extended concept of kill-ring. -- daveg 12/15/96
109(defun calc-yank ()
110  (interactive)
111  (calc-wrapper
112   (calc-pop-push-record-list
113    0 "yank"
114    (let ((thing (if (fboundp 'current-kill)
115		     (current-kill 0 t)
116		   (car kill-ring-yank-pointer))))
117      (if (eq (car-safe calc-last-kill) thing)
118	  (cdr calc-last-kill)
119	(if (stringp thing)
120	    (let ((val (math-read-exprs (calc-clean-newlines thing))))
121	      (if (eq (car-safe val) 'error)
122		  (progn
123		    (setq val (math-read-exprs thing))
124		    (if (eq (car-safe val) 'error)
125			(error "Bad format in yanked data")
126		      val))
127		val))))))))
128
129(defun calc-clean-newlines (s)
130  (cond
131
132   ;; Omit leading/trailing whitespace
133   ((or (string-match "\\`[ \n\r]+\\([^\001]*\\)\\'" s)
134	(string-match "\\`\\([^\001]*\\)[ \n\r]+\\'" s))
135    (calc-clean-newlines (math-match-substring s 1)))
136
137   ;; Convert newlines to commas
138   ((string-match "\\`\\(.*\\)[\n\r]+\\([^\001]*\\)\\'" s)
139    (calc-clean-newlines (concat (math-match-substring s 1) ","
140				 (math-match-substring s 2))))
141
142   (t s)))
143
144
145(defun calc-do-grab-region (top bot arg)
146  (when (memq major-mode '(calc-mode calc-trail-mode))
147    (error "This command works only in a regular text buffer"))
148  (let* ((from-buffer (current-buffer))
149	 (calc-was-started (get-buffer-window "*Calculator*"))
150	 (single nil)
151	 data vals pos)
152    (if arg
153	(if (consp arg)
154	    (setq single t)
155	  (setq arg (prefix-numeric-value arg))
156	  (if (= arg 0)
157	      (save-excursion
158		(beginning-of-line)
159		(setq top (point))
160		(end-of-line)
161		(setq bot (point)))
162	    (save-excursion
163	      (setq top (point))
164	      (forward-line arg)
165	      (if (> arg 0)
166		  (setq bot (point))
167		(setq bot top
168		      top (point)))))))
169    (setq data (buffer-substring top bot))
170    (calc)
171    (if single
172	(setq vals (math-read-expr data))
173      (setq vals (math-read-expr (concat "[" data "]")))
174      (and (eq (car-safe vals) 'vec)
175	   (= (length vals) 2)
176	   (eq (car-safe (nth 1 vals)) 'vec)
177	   (setq vals (nth 1 vals))))
178    (if (eq (car-safe vals) 'error)
179	(progn
180	  (if calc-was-started
181	      (pop-to-buffer from-buffer)
182	    (calc-quit t)
183	    (switch-to-buffer from-buffer))
184	  (goto-char top)
185	  (forward-char (+ (nth 1 vals) (if single 0 1)))
186	  (error (nth 2 vals))))
187    (calc-slow-wrapper
188     (calc-enter-result 0 "grab" vals))))
189
190
191(defun calc-do-grab-rectangle (top bot arg &optional reduce)
192  (and (memq major-mode '(calc-mode calc-trail-mode))
193       (error "This command works only in a regular text buffer"))
194  (let* ((col1 (save-excursion (goto-char top) (current-column)))
195	 (col2 (save-excursion (goto-char bot) (current-column)))
196	 (from-buffer (current-buffer))
197	 (calc-was-started (get-buffer-window "*Calculator*"))
198	 data mat vals lnum pt pos)
199    (if (= col1 col2)
200	(save-excursion
201	  (unless (= col1 0)
202	    (error "Point and mark must be at beginning of line, or define a rectangle"))
203	  (goto-char top)
204	  (while (< (point) bot)
205	    (setq pt (point))
206	    (forward-line 1)
207	    (setq data (cons (buffer-substring pt (1- (point))) data)))
208	  (setq data (nreverse data)))
209      (setq data (extract-rectangle top bot)))
210    (calc)
211    (setq mat (list 'vec)
212	  lnum 0)
213    (when arg
214      (setq arg (if (consp arg) 0 (prefix-numeric-value arg))))
215    (while data
216      (if (natnump arg)
217	  (progn
218	    (if (= arg 0)
219		(setq arg 1000000))
220	    (setq pos 0
221		  vals (list 'vec))
222	    (let ((w (length (car data)))
223		  j v)
224	      (while (< pos w)
225		(setq j (+ pos arg)
226		      v (if (>= j w)
227			    (math-read-expr (substring (car data) pos))
228			  (math-read-expr (substring (car data) pos j))))
229		(if (eq (car-safe v) 'error)
230		    (setq vals v w 0)
231		  (setq vals (nconc vals (list v))
232			pos j)))))
233	(if (string-match "\\` *-?[0-9][0-9]?[0-9]?[0-9]?[0-9]?[0-9]? *\\'"
234			  (car data))
235	    (setq vals (list 'vec (string-to-number (car data))))
236	  (if (and (null arg)
237		   (string-match "[[{][^][{}]*[]}]" (car data)))
238	      (setq pos (match-beginning 0)
239		    vals (math-read-expr (math-match-substring (car data) 0)))
240	    (let ((s (if (string-match
241			  "\\`\\([0-9]+:[ \t]\\)?\\(.*[^, \t]\\)[, \t]*\\'"
242			  (car data))
243			 (math-match-substring (car data) 2)
244		       (car data))))
245	      (setq pos -1
246		    vals (math-read-expr (concat "[" s "]")))
247	      (if (eq (car-safe vals) 'error)
248		  (let ((v2 (math-read-expr s)))
249		    (unless (eq (car-safe v2) 'error)
250		      (setq vals (list 'vec v2)))))))))
251      (if (eq (car-safe vals) 'error)
252	  (progn
253	    (if calc-was-started
254		(pop-to-buffer from-buffer)
255	      (calc-quit t)
256	      (switch-to-buffer from-buffer))
257	    (goto-char top)
258	    (forward-line lnum)
259	    (forward-char (+ (nth 1 vals) (min col1 col2) pos))
260	    (error (nth 2 vals))))
261      (unless (equal vals '(vec))
262	(setq mat (cons vals mat)))
263      (setq data (cdr data)
264	    lnum (1+ lnum)))
265    (calc-slow-wrapper
266     (if reduce
267	 (calc-enter-result 0 "grb+" (list reduce '(var add var-add)
268					   (nreverse mat)))
269       (calc-enter-result 0 "grab" (nreverse mat))))))
270
271
272(defun calc-copy-to-buffer (nn)
273  "Copy the top of stack into an editing buffer."
274  (interactive "P")
275  (let ((thebuf (and (not (memq major-mode '(calc-mode calc-trail-mode)))
276		     (current-buffer)))
277	(movept nil)
278	oldbuf newbuf)
279    (calc-wrapper
280     (save-excursion
281       (calc-force-refresh)
282       (let ((n (prefix-numeric-value nn))
283	     (eat-lnums calc-line-numbering)
284	     (big-offset (if (eq calc-language 'big) 1 0))
285	     top bot)
286	 (setq oldbuf (current-buffer)
287	       newbuf (or thebuf
288			  (calc-find-writable-buffer (buffer-list) 0)
289			  (calc-find-writable-buffer (buffer-list) 1)
290			  (error "No other buffer")))
291	 (cond ((and (or (null nn)
292			 (consp nn))
293		     (= (calc-substack-height 0)
294			(- (1- (calc-substack-height 1)) big-offset)))
295		(calc-cursor-stack-index 1)
296		(if (looking-at
297		     (if calc-line-numbering "[0-9]+: *[^ \n]" " *[^ \n]"))
298		    (goto-char (1- (match-end 0))))
299		(setq eat-lnums nil
300		      top (point))
301		(calc-cursor-stack-index 0)
302		(setq bot (- (1- (point)) big-offset)))
303	       ((> n 0)
304		(calc-cursor-stack-index n)
305		(setq top (point))
306		(calc-cursor-stack-index 0)
307		(setq bot (- (point) big-offset)))
308	       ((< n 0)
309		(calc-cursor-stack-index (- n))
310		(setq top (point))
311		(calc-cursor-stack-index (1- (- n)))
312		(setq bot (point)))
313	       (t
314		(goto-char (point-min))
315		(forward-line 1)
316		(setq top (point))
317		(calc-cursor-stack-index 0)
318		(setq bot (point))))
319	 (save-excursion
320	   (set-buffer newbuf)
321	   (if (consp nn)
322	       (kill-region (region-beginning) (region-end)))
323	   (push-mark (point) t)
324	   (if (and overwrite-mode (not (consp nn)))
325	       (calc-overwrite-string (save-excursion
326					(set-buffer oldbuf)
327					(buffer-substring top bot))
328				      eat-lnums)
329	     (or (bolp) (setq eat-lnums nil))
330	     (insert-buffer-substring oldbuf top bot)
331	     (and eat-lnums
332		  (let ((n 1))
333		    (while (and (> (point) (mark))
334				(progn
335				  (forward-line -1)
336				  (>= (point) (mark))))
337		      (delete-char 4)
338		      (setq n (1+ n)))
339		    (forward-line n))))
340	   (when thebuf
341	     (setq movept (point)))
342	   (when (get-buffer-window (current-buffer))
343	     (set-window-point (get-buffer-window (current-buffer))
344			       (point)))))))
345    (when movept
346      (goto-char movept))
347    (when (and (consp nn)
348	       (not thebuf))
349      (calc-quit t)
350      (switch-to-buffer newbuf))))
351
352(defun calc-overwrite-string (str eat-lnums)
353  (when (string-match "\n\\'" str)
354    (setq str (substring str 0 -1)))
355  (when eat-lnums
356    (setq str (substring str 4)))
357  (if (and (string-match "\\`[-+]?[0-9.]+\\(e-?[0-9]+\\)?\\'" str)
358	   (looking-at "[-+]?[0-9.]+\\(e-?[0-9]+\\)?"))
359      (progn
360	(delete-region (point) (match-end 0))
361	(insert str))
362    (let ((i 0))
363      (while (< i (length str))
364	(if (= (setq last-command-char (aref str i)) ?\n)
365	    (or (= i (1- (length str)))
366		(let ((pt (point)))
367		  (end-of-line)
368		  (delete-region pt (point))
369		  (if (eobp)
370		      (insert "\n")
371		    (forward-char 1))
372		  (if eat-lnums (setq i (+ i 4)))))
373	  (self-insert-command 1))
374	(setq i (1+ i))))))
375
376;;; First, require that buffer is visible and does not begin with "*"
377;;; Second, require only that it not begin with "*Calc"
378(defun calc-find-writable-buffer (buf mode)
379  (and buf
380       (if (or (string-match "\\`\\( .*\\|\\*Calc.*\\)"
381			     (buffer-name (car buf)))
382	       (and (= mode 0)
383		    (or (string-match "\\`\\*.*" (buffer-name (car buf)))
384			(not (get-buffer-window (car buf))))))
385	   (calc-find-writable-buffer (cdr buf) mode)
386	 (car buf))))
387
388
389(defun calc-edit (n)
390  (interactive "p")
391  (calc-slow-wrapper
392   (when (eq n 0)
393     (setq n (calc-stack-size)))
394   (let* ((flag nil)
395	  (allow-ret (> n 1))
396	  (list (math-showing-full-precision
397		 (mapcar (if (> n 1)
398			     (function (lambda (x)
399					 (math-format-flat-expr x 0)))
400			   (function
401			    (lambda (x)
402			      (if (math-vectorp x) (setq allow-ret t))
403			      (math-format-nice-expr x (frame-width)))))
404			 (if (> n 0)
405			     (calc-top-list n)
406			   (calc-top-list 1 (- n)))))))
407     (calc-edit-mode (list 'calc-finish-stack-edit (or flag n)) allow-ret)
408     (while list
409       (insert (car list) "\n")
410       (setq list (cdr list)))))
411  (calc-show-edit-buffer))
412
413(defun calc-alg-edit (str)
414  (calc-edit-mode '(calc-finish-stack-edit 0))
415  (calc-show-edit-buffer)
416  (insert str "\n")
417  (backward-char 1)
418  (calc-set-command-flag 'do-edit))
419
420(defvar calc-edit-mode-map nil "Keymap for use by the calc-edit command.")
421(if calc-edit-mode-map
422    ()
423  (setq calc-edit-mode-map (make-sparse-keymap))
424  (define-key calc-edit-mode-map "\n" 'calc-edit-finish)
425  (define-key calc-edit-mode-map "\r" 'calc-edit-return)
426  (define-key calc-edit-mode-map "\C-c\C-c" 'calc-edit-finish))
427
428(defvar calc-original-buffer)
429(defvar calc-return-buffer)
430(defvar calc-one-window)
431(defvar calc-edit-handler)
432(defvar calc-restore-trail)
433(defvar calc-allow-ret)
434(defvar calc-edit-top)
435
436(defun calc-edit-mode (&optional handler allow-ret title)
437  "Calculator editing mode.  Press RET, LFD, or C-c C-c to finish.
438To cancel the edit, simply kill the *Calc Edit* buffer."
439  (interactive)
440  (unless handler
441    (error "This command can be used only indirectly through calc-edit"))
442  (let ((oldbuf (current-buffer))
443	(buf (get-buffer-create "*Calc Edit*")))
444    (set-buffer buf)
445    (kill-all-local-variables)
446    (use-local-map calc-edit-mode-map)
447    (setq buffer-read-only nil)
448    (setq truncate-lines nil)
449    (setq major-mode 'calc-edit-mode)
450    (setq mode-name "Calc Edit")
451    (run-mode-hooks 'calc-edit-mode-hook)
452    (make-local-variable 'calc-original-buffer)
453    (setq calc-original-buffer oldbuf)
454    (make-local-variable 'calc-return-buffer)
455    (setq calc-return-buffer oldbuf)
456    (make-local-variable 'calc-one-window)
457    (setq calc-one-window (and (one-window-p t) pop-up-windows))
458    (make-local-variable 'calc-edit-handler)
459    (setq calc-edit-handler handler)
460    (make-local-variable 'calc-restore-trail)
461    (setq calc-restore-trail (get-buffer-window (calc-trail-buffer)))
462    (make-local-variable 'calc-allow-ret)
463    (setq calc-allow-ret allow-ret)
464    (let ((inhibit-read-only t))
465      (erase-buffer))
466    (add-hook 'kill-buffer-hook (lambda ()
467                                  (let ((calc-edit-handler nil))
468                                    (calc-edit-finish t))
469                                  (message "(Cancelled)")) t t)
470    (insert (propertize
471             (concat
472              (or title title "Calc Edit Mode. ")
473              "Press `C-c C-c'"
474              (if allow-ret "" " or RET")
475              " to finish, `C-x k RET' to cancel.\n\n")
476             'font-lock-face 'italic 'read-only t 'rear-nonsticky t 'front-sticky t))
477    (make-local-variable 'calc-edit-top)
478    (setq calc-edit-top (point))))
479(put 'calc-edit-mode 'mode-class 'special)
480
481(defun calc-show-edit-buffer ()
482  (let ((buf (current-buffer)))
483    (if (and (one-window-p t) pop-up-windows)
484	(pop-to-buffer (get-buffer-create "*Calc Edit*"))
485      (and calc-embedded-info (get-buffer-window (aref calc-embedded-info 1))
486	   (select-window (get-buffer-window (aref calc-embedded-info 1))))
487      (switch-to-buffer (get-buffer-create "*Calc Edit*")))
488    (setq calc-return-buffer buf)
489    (if (and (< (window-width) (frame-width))
490	     calc-display-trail)
491	(let ((win (get-buffer-window (calc-trail-buffer))))
492	  (if win
493	      (delete-window win))))
494    (set-buffer-modified-p nil)
495    (goto-char calc-edit-top)))
496
497(defun calc-edit-return ()
498  (interactive)
499  (if (and (boundp 'calc-allow-ret) calc-allow-ret)
500      (newline)
501    (calc-edit-finish)))
502
503;; The variable calc-edit-disp-trail is local to calc-edit finish, but
504;; is used by calc-finish-selection-edit and calc-finish-stack-edit.
505(defvar calc-edit-disp-trail)
506
507(defun calc-edit-finish (&optional keep)
508  "Finish calc-edit mode.  Parse buffer contents and push them on the stack."
509  (interactive "P")
510  (message "Working...")
511  (or (and (boundp 'calc-original-buffer)
512	   (boundp 'calc-return-buffer)
513	   (boundp 'calc-one-window)
514	   (boundp 'calc-edit-handler)
515	   (boundp 'calc-restore-trail)
516	   (eq major-mode 'calc-edit-mode))
517      (error "This command is valid only in buffers created by calc-edit"))
518  (let ((buf (current-buffer))
519	(original calc-original-buffer)
520	(return calc-return-buffer)
521	(one-window calc-one-window)
522	(calc-edit-disp-trail calc-restore-trail))
523    (save-excursion
524      (when (or (null (buffer-name original))
525		(progn
526		  (set-buffer original)
527		  (not (eq major-mode 'calc-mode))))
528	(error "Original calculator buffer has been corrupted")))
529    (goto-char calc-edit-top)
530    (if (buffer-modified-p)
531	(eval calc-edit-handler))
532    (if (and one-window (not (one-window-p t)))
533	(delete-window))
534    (if (get-buffer-window return)
535	(select-window (get-buffer-window return))
536      (switch-to-buffer return))
537    (if keep
538	(bury-buffer buf)
539      (kill-buffer buf))
540    (if calc-edit-disp-trail
541	(calc-wrapper
542	 (calc-trail-display 1 t)))
543    (message "")))
544
545(defun calc-edit-cancel ()
546  "Cancel calc-edit mode.  Ignore the Calc Edit buffer and don't change stack."
547  (interactive)
548  (let ((calc-edit-handler nil))
549    (calc-edit-finish))
550  (message "(Cancelled)"))
551
552(defun calc-finish-stack-edit (num)
553  (let ((buf (current-buffer))
554	(str (buffer-substring calc-edit-top (point-max)))
555	(start (point))
556	pos)
557    (if (and (integerp num) (> num 1))
558	(while (setq pos (string-match "\n." str))
559	  (aset str pos ?\,)))
560    (switch-to-buffer calc-original-buffer)
561    (let ((vals (let ((calc-language nil)
562		      (math-expr-opers math-standard-opers))
563		  (and (string-match "[^\n\t ]" str)
564		       (math-read-exprs str)))))
565      (when (eq (car-safe vals) 'error)
566	(switch-to-buffer buf)
567	(goto-char (+ start (nth 1 vals)))
568	(error (nth 2 vals)))
569      (calc-wrapper
570       (if (symbolp num)
571	   (progn
572	     (set num (car vals))
573	     (calc-refresh-evaltos num))
574	 (if calc-edit-disp-trail
575	     (calc-trail-display 1 t))
576	 (and vals
577	      (let ((calc-simplify-mode (if (eq last-command-char ?\C-j)
578					    'none
579					  calc-simplify-mode)))
580		(if (>= num 0)
581		    (calc-enter-result num "edit" vals)
582		  (calc-enter-result 1 "edit" vals (- num))))))))))
583
584(provide 'calc-yank)
585
586;;; arch-tag: ca61019e-caca-4daa-b32c-b6afe372d5b5
587;;; calc-yank.el ends here
588