code.delx.au - gnu-emacs/blob - lisp/calc/calc-embed.el

   1 ;;; calc-embed.el --- embed Calc in a buffer
   2
   3 ;; Copyright (C) 1990, 1991, 1992, 1993, 2001 Free Software Foundation, Inc.
   4
   5 ;; Author: David Gillespie <daveg@synaptics.com>
   6 ;; Maintainer: Jay Belanger <belanger@truman.edu>
   7
   8 ;; This file is part of GNU Emacs.
   9
  10 ;; GNU Emacs is distributed in the hope that it will be useful,
  11 ;; but WITHOUT ANY WARRANTY.  No author or distributor
  12 ;; accepts responsibility to anyone for the consequences of using it
  13 ;; or for whether it serves any particular purpose or works at all,
  14 ;; unless he says so in writing.  Refer to the GNU Emacs General Public
  15 ;; License for full details.
  16
  17 ;; Everyone is granted permission to copy, modify and redistribute
  18 ;; GNU Emacs, but only under the conditions described in the
  19 ;; GNU Emacs General Public License.   A copy of this license is
  20 ;; supposed to have been given to you along with GNU Emacs so you
  21 ;; can know your rights and responsibilities.  It should be in a
  22 ;; file named COPYING.  Among other things, the copyright notice
  23 ;; and this notice must be preserved on all copies.
  24
  25 ;;; Commentary:
  26
  27 ;;; Code:
  28
  29 ;; This file is autoloaded from calc-ext.el.
  30
  31 (require 'calc-ext)
  32 (require 'calc-macs)
  33
  34 (defun calc-show-plain (n)
  35   (interactive "P")
  36   (calc-wrapper
  37    (calc-set-command-flag 'renum-stack)
  38    (message (if (calc-change-mode 'calc-show-plain n nil t)
  39                 "Including \"plain\" formulas in Calc Embedded mode"
  40               "Omitting \"plain\" formulas in Calc Embedded mode"))))
  41
  42
  43 (defvar calc-embedded-modes nil)
  44 (defvar calc-embedded-globals nil)
  45 (defvar calc-embedded-active nil)
  46 (defvar calc-embedded-all-active nil)
  47 (make-variable-buffer-local 'calc-embedded-all-active)
  48 (defvar calc-embedded-some-active nil)
  49 (make-variable-buffer-local 'calc-embedded-some-active)
  50
  51 (defvar calc-embedded-open-formula "\\`\\|^\n\\|\\$\\$?\\|\\\\\\[\\|^\\\\begin[^{].*\n\\|^\\\\begin{.*[^x]}.*\n\\|^@.*\n\\|^\\.EQ.*\n\\|\\\\(\\|^%\n\\|^\\.\\\\\"\n"
  52   "*A regular expression for the opening delimiter of a formula used by
  53 calc-embedded.")
  54
  55 (defvar calc-embedded-close-formula "\\'\\|\n$\\|\\$\\$?\\|\\\\]\\|^\\\\end[^{].*\n\\|^\\\\end{.*[^x]}.*\n\\|^@.*\n\\|^\\.EN.*\n\\|\\\\)\\|\n%\n\\|^\\.\\\\\"\n"
  56   "*A regular expression for the closing delimiter of a formula used by
  57 calc-embedded.")
  58
  59 (defvar calc-embedded-open-word "^\\|[^-+0-9.eE]"
  60   "*A regular expression for the opening delimiter of a formula used by
  61 calc-embedded-word.")
  62
  63 (defvar calc-embedded-close-word "$\\|[^-+0-9.eE]"
  64   "*A regular expression for the closing delimiter of a formula used by
  65 calc-embedded-word.")
  66
  67 (defvar calc-embedded-open-plain "%%% "
  68   "*A string which is the opening delimiter for a \"plain\" formula.
  69 If calc-show-plain mode is enabled, this is inserted at the front of
  70 each formula.")
  71
  72 (defvar calc-embedded-close-plain " %%%\n"
  73   "*A string which is the closing delimiter for a \"plain\" formula.
  74 See calc-embedded-open-plain.")
  75
  76 (defvar calc-embedded-open-new-formula "\n\n"
  77   "*A string which is inserted at front of formula by calc-embedded-new-formula.")
  78
  79 (defvar calc-embedded-close-new-formula "\n\n"
  80   "*A string which is inserted at end of formula by calc-embedded-new-formula.")
  81
  82 (defvar calc-embedded-announce-formula "%Embed\n\\(% .*\n\\)*"
  83   "*A regular expression which is sure to be followed by a calc-embedded formula." )
  84
  85 (defvar calc-embedded-open-mode "% "
  86   "*A string which should precede calc-embedded mode annotations.
  87 This is not required to be present for user-written mode annotations.")
  88
  89 (defvar calc-embedded-close-mode "\n"
  90   "*A string which should follow calc-embedded mode annotations.
  91 This is not required to be present for user-written mode annotations.")
  92
  93
  94 (defconst calc-embedded-mode-vars '(("precision" . calc-internal-prec)
  95                                     ("word-size" . calc-word-size)
  96                                     ("angles" . calc-angle-mode)
  97                                     ("symbolic" . calc-symbolic-mode)
  98                                     ("matrix" . calc-matrix-mode)
  99                                     ("fractions" . calc-prefer-frac)
 100                                     ("complex" . calc-complex-mode)
 101                                     ("simplify" . calc-simplify-mode)
 102                                     ("language" . the-language)
 103                                     ("plain" . calc-show-plain)
 104                                     ("break" . calc-line-breaking)
 105                                     ("justify" . the-display-just)
 106                                     ("left-label" . calc-left-label)
 107                                     ("right-label" . calc-right-label)
 108                                     ("radix" . calc-number-radix)
 109                                     ("leading-zeros" . calc-leading-zeros)
 110                                     ("grouping" . calc-group-digits)
 111                                     ("group-char" . calc-group-char)
 112                                     ("point-char" . calc-point-char)
 113                                     ("frac-format" . calc-frac-format)
 114                                     ("float-format" . calc-float-format)
 115                                     ("complex-format" . calc-complex-format)
 116                                     ("hms-format" . calc-hms-format)
 117                                     ("date-format" . calc-date-format)
 118                                     ("matrix-justify" . calc-matrix-just)
 119                                     ("full-vectors" . calc-full-vectors)
 120                                     ("break-vectors" . calc-break-vectors)
 121                                     ("vector-commas" . calc-vector-commas)
 122                                     ("vector-brackets" . calc-vector-brackets)
 123                                     ("matrix-brackets" . calc-matrix-brackets)
 124                                     ("strings" . calc-display-strings)
 125 ))
 126
 127
 128 ;;; Format of calc-embedded-info vector:
 129 ;;;    0   Editing buffer.
 130 ;;;    1   Calculator buffer.
 131 ;;;    2   Top of current formula (marker).
 132 ;;;    3   Bottom of current formula (marker).
 133 ;;;    4   Top of current formula's delimiters (marker).
 134 ;;;    5   Bottom of current formula's delimiters (marker).
 135 ;;;    6   String representation of current formula.
 136 ;;;    7   Non-nil if formula is embedded within a single line.
 137 ;;;    8   Internal representation of current formula.
 138 ;;;    9   Variable assigned by this formula, or nil.
 139 ;;;   10   List of variables upon which this formula depends.
 140 ;;;   11   Evaluated value of the formula, or nil.
 141 ;;;   12   Mode settings for current formula.
 142 ;;;   13   Local mode settings for current formula.
 143 ;;;   14   Permanent mode settings for current formula.
 144 ;;;   15   Global mode settings for editing buffer.
 145
 146
 147 ;;; calc-embedded-active is an a-list keyed on buffers; each cdr is a
 148 ;;; sorted list of calc-embedded-infos in that buffer.  We do this
 149 ;;; rather than using buffer-local variables because the latter are
 150 ;;; thrown away when a buffer changes major modes.
 151
 152 ;; The variables calc-embed-outer-top, calc-embed-outer-bot,
 153 ;; calc-embed-top and calc-embed-bot are
 154 ;; local to calc-do-embedded, calc-embedded-mark-formula,
 155 ;; calc-embedded-duplicate, calc-embedded-new-formula and
 156 ;; calc-embedded-make-info, but are used by calc-embedded-find-bounds,
 157 ;; which is called (directly or indirectly) by the above functions.
 158 (defvar calc-embed-outer-top)
 159 (defvar calc-embed-outer-bot)
 160 (defvar calc-embed-top)
 161 (defvar calc-embed-bot)
 162
 163 (defvar calc-embedded-quiet nil)
 164 (defun calc-do-embedded (arg end obeg oend)
 165   (if calc-embedded-info
 166
 167       ;; Turn embedded mode off or switch to a new buffer.
 168       (cond ((eq (current-buffer) (aref calc-embedded-info 1))
 169              (let ((calcbuf (current-buffer))
 170                    (buf (aref calc-embedded-info 0)))
 171                (calc-embedded-original-buffer t)
 172                (calc-embedded nil)
 173                (switch-to-buffer calcbuf)))
 174
 175             ((eq (current-buffer) (aref calc-embedded-info 0))
 176              (let* ((info calc-embedded-info)
 177                     (mode calc-embedded-modes))
 178                (save-excursion
 179                  (set-buffer (aref info 1))
 180                  (if (and (> (calc-stack-size) 0)
 181                           (equal (calc-top 1 'full) (aref info 8)))
 182                      (let ((calc-no-refresh-evaltos t))
 183                        (if (calc-top 1 'sel)
 184                            (calc-unselect 1))
 185                        (calc-embedded-set-modes
 186                         (aref info 15) (aref info 12) (aref info 14))
 187                        (let ((calc-embedded-info nil))
 188                          (calc-wrapper (calc-pop-stack))))
 189                    (calc-set-mode-line)))
 190                (setq calc-embedded-info nil
 191                      mode-line-buffer-identification (car mode)
 192                      truncate-lines (nth 2 mode)
 193                      buffer-read-only nil)
 194                (use-local-map (nth 1 mode))
 195                (set-buffer-modified-p (buffer-modified-p))
 196                (or calc-embedded-quiet
 197                    (message "Back to %s mode" mode-name))))
 198
 199             (t
 200              (if (buffer-name (aref calc-embedded-info 0))
 201                  (save-excursion
 202                    (set-buffer (aref calc-embedded-info 0))
 203                    (or (y-or-n-p (format "Cancel Calc Embedded mode in buffer %s? "
 204                                          (buffer-name)))
 205                        (keyboard-quit))
 206                    (calc-embedded nil)))
 207              (calc-embedded arg end obeg oend)))
 208
 209     ;; Turn embedded mode on.
 210     (calc-plain-buffer-only)
 211     (let ((modes (list mode-line-buffer-identification
 212                        (current-local-map)
 213                        truncate-lines))
 214           calc-embed-top calc-embed-bot calc-embed-outer-top calc-embed-outer-bot
 215           info chg ident)
 216       (barf-if-buffer-read-only)
 217       (or calc-embedded-globals
 218           (calc-find-globals))
 219       (setq info (calc-embedded-make-info (point) nil t arg end obeg oend))
 220       (if (eq (car-safe (aref info 8)) 'error)
 221           (progn
 222             (goto-char (nth 1 (aref info 8)))
 223             (error (nth 2 (aref info 8)))))
 224       (let ((mode-line-buffer-identification mode-line-buffer-identification)
 225             (calc-embedded-info info)
 226             (calc-embedded-no-reselect t))
 227         (calc-wrapper
 228          (let* ((okay nil)
 229                 (calc-no-refresh-evaltos t))
 230            (setq chg (calc-embedded-set-modes
 231                       (aref info 15) (aref info 12) (aref info 13)))
 232            (if (aref info 8)
 233                (calc-push (calc-normalize (aref info 8)))
 234              (calc-alg-entry)))
 235          (setq calc-undo-list nil
 236                calc-redo-list nil
 237                ident mode-line-buffer-identification)))
 238       (setq calc-embedded-info info
 239             calc-embedded-modes modes
 240             mode-line-buffer-identification ident
 241             truncate-lines t
 242             buffer-read-only t)
 243       (set-buffer-modified-p (buffer-modified-p))
 244       (use-local-map calc-mode-map)
 245       (setq calc-no-refresh-evaltos nil)
 246       (and chg calc-any-evaltos (calc-wrapper (calc-refresh-evaltos)))
 247       (or (eq calc-embedded-quiet t)
 248           (message "Embedded Calc mode enabled; %s to return to normal"
 249                    (if calc-embedded-quiet
 250                        "Type `M-# x'"
 251                      "Give this command again")))))
 252   (scroll-down 0))    ; fix a bug which occurs when truncate-lines is changed.
 253
 254
 255 (defun calc-embedded-select (arg)
 256   (interactive "P")
 257   (calc-embedded arg)
 258   (and calc-embedded-info
 259        (eq (car-safe (aref calc-embedded-info 8)) 'calcFunc-evalto)
 260        (calc-select-part 1))
 261   (and calc-embedded-info
 262        (or (eq (car-safe (aref calc-embedded-info 8)) 'calcFunc-assign)
 263            (and (eq (car-safe (aref calc-embedded-info 8)) 'calcFunc-evalto)
 264                 (eq (car-safe (nth 1 (aref calc-embedded-info 8)))
 265                     'calcFunc-assign)))
 266        (calc-select-part 2)))
 267
 268
 269 (defun calc-embedded-update-formula (arg)
 270   (interactive "P")
 271   (if arg
 272       (let ((entry (assq (current-buffer) calc-embedded-active)))
 273         (while (setq entry (cdr entry))
 274           (and (eq (car-safe (aref (car entry) 8)) 'calcFunc-evalto)
 275                (or (not (consp arg))
 276                    (and (<= (aref (car entry) 2) (region-beginning))
 277                         (>= (aref (car entry) 3) (region-end))))
 278                (save-excursion
 279                  (calc-embedded-update (car entry) 14 t t)))))
 280     (if (and calc-embedded-info
 281              (eq (current-buffer) (aref calc-embedded-info 0))
 282              (>= (point) (aref calc-embedded-info 4))
 283              (<= (point) (aref calc-embedded-info 5)))
 284         (calc-evaluate 1)
 285       (let* ((opt (point))
 286              (info (calc-embedded-make-info (point) nil t))
 287              (pt (- opt (aref info 4))))
 288         (or (eq (car-safe (aref info 8)) 'error)
 289             (progn
 290               (save-excursion
 291                 (calc-embedded-update info 14 'eval t))
 292               (goto-char (+ (aref info 4) pt))))))))
 293
 294
 295 (defun calc-embedded-edit (arg)
 296   (interactive "P")
 297   (let ((info (calc-embedded-make-info (point) nil t arg))
 298         str)
 299     (if (eq (car-safe (aref info 8)) 'error)
 300         (progn
 301           (goto-char (nth 1 (aref info 8)))
 302           (error (nth 2 (aref info 8)))))
 303     (calc-wrapper
 304      (setq str (math-showing-full-precision
 305                 (math-format-nice-expr (aref info 8) (frame-width))))
 306      (calc-edit-mode (list 'calc-embedded-finish-edit info))
 307      (insert str "\n")))
 308   (calc-show-edit-buffer))
 309
 310 (defvar calc-original-buffer)
 311 (defvar calc-edit-top)
 312 (defun calc-embedded-finish-edit (info)
 313   (let ((buf (current-buffer))
 314         (str (buffer-substring calc-edit-top (point-max)))
 315         (start (point))
 316         pos)
 317     (switch-to-buffer calc-original-buffer)
 318     (let ((val (save-excursion
 319                  (set-buffer (aref info 1))
 320                  (let ((calc-language nil)
 321                        (math-expr-opers math-standard-opers))
 322                    (math-read-expr str)))))
 323       (if (eq (car-safe val) 'error)
 324           (progn
 325             (switch-to-buffer buf)
 326             (goto-char (+ start (nth 1 val)))
 327             (error (nth 2 val))))
 328       (calc-embedded-original-buffer t info)
 329       (aset info 8 val)
 330       (calc-embedded-update info 14 t t))))
 331
 332 (defun calc-do-embedded-activate (arg cbuf)
 333   (calc-plain-buffer-only)
 334   (if arg
 335       (calc-embedded-forget))
 336   (calc-find-globals)
 337   (if (< (prefix-numeric-value arg) 0)
 338       (message "Deactivating %s for Calc Embedded mode" (buffer-name))
 339     (message "Activating %s for Calc Embedded mode..." (buffer-name))
 340     (save-excursion
 341       (let* ((active (assq (current-buffer) calc-embedded-active))
 342              (info active)
 343              (pat " := \\| \\\\gets \\| => \\| \\\\evalto "))
 344         (if calc-embedded-announce-formula
 345             (setq pat (format "%s\\|\\(%s\\)"
 346                               pat calc-embedded-announce-formula)))
 347         (while (setq info (cdr info))
 348           (or (equal (buffer-substring (aref (car info) 2) (aref (car info) 3))
 349                      (aref (car info) 6))
 350               (setcdr active (delq (car info) (cdr active)))))
 351         (goto-char (point-min))
 352         (while (re-search-forward pat nil t)
 353 ;;;       (if (looking-at calc-embedded-open-formula)
 354 ;;;           (goto-char (match-end 1)))
 355           (setq info (calc-embedded-make-info (point) cbuf nil))
 356           (or (eq (car-safe (aref info 8)) 'error)
 357               (goto-char (aref info 5))))))
 358     (message "Activating %s for Calc Embedded mode...done" (buffer-name)))
 359   (calc-embedded-active-state t))
 360
 361 (defun calc-plain-buffer-only ()
 362   (if (memq major-mode '(calc-mode calc-trail-mode calc-edit-mode))
 363       (error "This command should be used in a normal editing buffer")))
 364
 365 (defun calc-embedded-active-state (state)
 366   (or (assq 'calc-embedded-all-active minor-mode-alist)
 367       (setq minor-mode-alist
 368             (cons '(calc-embedded-all-active " Active")
 369                   (cons '(calc-embedded-some-active " ~Active")
 370                         minor-mode-alist))))
 371   (let ((active (assq (current-buffer) calc-embedded-active)))
 372     (or (cdr active)
 373         (setq state nil)))
 374   (and (eq state 'more) calc-embedded-all-active (setq state t))
 375   (setq calc-embedded-all-active (eq state t)
 376         calc-embedded-some-active (not (memq state '(nil t))))
 377   (set-buffer-modified-p (buffer-modified-p)))
 378
 379
 380 (defun calc-embedded-original-buffer (switch &optional info)
 381   (or info (setq info calc-embedded-info))
 382   (or (buffer-name (aref info 0))
 383       (progn
 384         (error "Calc embedded mode: Original buffer has been killed")))
 385   (if switch
 386       (set-buffer (aref info 0))))
 387
 388 (defun calc-embedded-word ()
 389   (interactive)
 390   (calc-embedded '(4)))
 391
 392 (defun calc-embedded-mark-formula (&optional body-only)
 393   "Put point at the beginning of this Calc formula, mark at the end.
 394 This normally marks the whole formula, including surrounding delimiters.
 395 With any prefix argument, marks only the formula itself."
 396   (interactive "P")
 397   (and (eq major-mode 'calc-mode)
 398        (error "This command should be used in a normal editing buffer"))
 399   (let (calc-embed-top calc-embed-bot calc-embed-outer-top calc-embed-outer-bot)
 400     (save-excursion
 401       (calc-embedded-find-bounds body-only))
 402     (push-mark (if body-only calc-embed-bot calc-embed-outer-bot) t)
 403     (goto-char (if body-only calc-embed-top calc-embed-outer-top))))
 404
 405 (defun calc-embedded-find-bounds (&optional plain)
 406   ;; (while (and (bolp) (eq (following-char) ?\n))
 407   ;;  (forward-char 1))
 408   (and (eolp) (bolp) (not (eq (char-after (- (point) 2)) ?\n))
 409        (forward-char -1))
 410   (let ((home (point)))
 411     (or (and (looking-at calc-embedded-open-formula)
 412              (not (looking-at calc-embedded-close-formula)))
 413         (re-search-backward calc-embedded-open-formula nil t)
 414         (error "Can't find start of formula"))
 415     (and (eq (preceding-char) ?\$)  ; backward search for \$\$? won't back
 416          (eq (following-char) ?\$)  ; up over a second $, so do it by hand.
 417          (forward-char -1))
 418     (setq calc-embed-outer-top (point))
 419     (goto-char (match-end 0))
 420     (if (looking-at "[ \t]*$")
 421         (end-of-line))
 422     (if (eq (following-char) ?\n)
 423         (forward-char 1))
 424     (or (bolp)
 425         (while (eq (following-char) ?\ )
 426           (forward-char 1)))
 427     (or (eq plain 'plain)
 428         (if (looking-at (regexp-quote calc-embedded-open-plain))
 429             (progn
 430               (goto-char (match-end 0))
 431               (search-forward calc-embedded-close-plain))))
 432     (setq calc-embed-top (point))
 433     (or (re-search-forward calc-embedded-close-formula nil t)
 434         (error "Can't find end of formula"))
 435     (if (< (point) home)
 436         (error "Not inside a formula"))
 437     (and (eq (following-char) ?\n) (not (bolp))
 438          (forward-char 1))
 439     (setq calc-embed-outer-bot (point))
 440     (goto-char (match-beginning 0))
 441     (if (eq (preceding-char) ?\n)
 442         (backward-char 1))
 443     (or (eolp)
 444         (while (eq (preceding-char) ?\ )
 445           (backward-char 1)))
 446     (setq calc-embed-bot (point))))
 447
 448 (defun calc-embedded-kill-formula ()
 449   "Kill the formula surrounding point.
 450 If Calc Embedded mode was active, this deactivates it.
 451 The formula (including its surrounding delimiters) is saved in the kill ring.
 452 The command \\[yank] can retrieve it from there."
 453   (interactive)
 454   (and calc-embedded-info
 455        (calc-embedded nil))
 456   (calc-embedded-mark-formula)
 457   (kill-region (point) (mark))
 458   (pop-mark))
 459
 460 (defun calc-embedded-copy-formula-as-kill ()
 461   "Save the formula surrounding point as if killed, but don't kill it."
 462   (interactive)
 463   (save-excursion
 464     (calc-embedded-mark-formula)
 465     (copy-region-as-kill (point) (mark))
 466     (pop-mark)))
 467
 468 (defun calc-embedded-duplicate ()
 469   (interactive)
 470   (let ((already calc-embedded-info)
 471         calc-embed-top calc-embed-bot calc-embed-outer-top calc-embed-outer-bot new-top)
 472     (if calc-embedded-info
 473         (progn
 474           (setq calc-embed-top (+ (aref calc-embedded-info 2))
 475                 calc-embed-bot (+ (aref calc-embedded-info 3))
 476                 calc-embed-outer-top (+ (aref calc-embedded-info 4))
 477                 calc-embed-outer-bot (+ (aref calc-embedded-info 5)))
 478           (calc-embedded nil))
 479       (calc-embedded-find-bounds))
 480     (goto-char calc-embed-outer-bot)
 481     (insert "\n")
 482     (setq new-top (point))
 483     (insert-buffer-substring (current-buffer)
 484                              calc-embed-outer-top calc-embed-outer-bot)
 485     (goto-char (+ new-top (- calc-embed-top calc-embed-outer-top)))
 486     (let ((calc-embedded-quiet (if already t 'x)))
 487       (calc-embedded (+ new-top (- calc-embed-top calc-embed-outer-top))
 488                      (+ new-top (- calc-embed-bot calc-embed-outer-top))
 489                      new-top
 490                      (+ new-top (- calc-embed-outer-bot calc-embed-outer-top))))))
 491
 492 (defun calc-embedded-next (arg)
 493   (interactive "P")
 494   (setq arg (prefix-numeric-value arg))
 495   (let* ((active (cdr (assq (current-buffer) calc-embedded-active)))
 496          (p active)
 497          (num (length active)))
 498     (or active
 499         (error "No active formulas in buffer"))
 500     (cond ((= arg 0))
 501           ((= arg -1)
 502            (if (<= (point) (aref (car active) 3))
 503                (goto-char (aref (nth (1- num) active) 2))
 504              (while (and (cdr p)
 505                          (> (point) (aref (nth 1 p) 3)))
 506                (setq p (cdr p)))
 507              (goto-char (aref (car p) 2))))
 508           ((< arg -1)
 509            (calc-embedded-next -1)
 510            (calc-embedded-next (+ (* num 1000) arg 1)))
 511           (t
 512            (setq arg (1+ (% (1- arg) num)))
 513            (while (and p (>= (point) (aref (car p) 2)))
 514              (setq p (cdr p)))
 515            (while (> (setq arg (1- arg)) 0)
 516              (setq p (if p (cdr p) (cdr active))))
 517            (goto-char (aref (car (or p active)) 2))))))
 518
 519 (defun calc-embedded-previous (arg)
 520   (interactive "p")
 521   (calc-embedded-next (- (prefix-numeric-value arg))))
 522
 523 (defun calc-embedded-new-formula ()
 524   (interactive)
 525   (and (eq major-mode 'calc-mode)
 526        (error "This command should be used in a normal editing buffer"))
 527   (if calc-embedded-info
 528       (calc-embedded nil))
 529   (let (calc-embed-top calc-embed-bot calc-embed-outer-top calc-embed-outer-bot)
 530     (if (and (eq (preceding-char) ?\n)
 531              (string-match "\\`\n" calc-embedded-open-new-formula))
 532         (progn
 533           (setq calc-embed-outer-top (1- (point)))
 534           (forward-char -1)
 535           (insert (substring calc-embedded-open-new-formula 1)))
 536       (setq calc-embed-outer-top (point))
 537       (insert calc-embedded-open-new-formula))
 538     (setq calc-embed-top (point))
 539     (insert " ")
 540     (setq calc-embed-bot (point))
 541     (insert calc-embedded-close-new-formula)
 542     (if (and (eq (following-char) ?\n)
 543              (string-match "\n\\'" calc-embedded-close-new-formula))
 544         (delete-char 1))
 545     (setq calc-embed-outer-bot (point))
 546     (goto-char calc-embed-top)
 547     (let ((calc-embedded-quiet 'x))
 548       (calc-embedded calc-embed-top calc-embed-bot calc-embed-outer-top calc-embed-outer-bot))))
 549
 550 (defun calc-embedded-forget ()
 551   (interactive)
 552   (setq calc-embedded-active (delq (assq (current-buffer) calc-embedded-active)
 553                                    calc-embedded-active))
 554   (calc-embedded-active-state nil))
 555
 556 ;; The variables calc-embed-prev-modes is local to calc-embedded-update,
 557 ;; but is used by calc-embedded-set-modes.
 558 (defvar calc-embed-prev-modes)
 559
 560 (defun calc-embedded-set-modes (gmodes modes local-modes &optional temp)
 561   (let ((the-language (calc-embedded-language))
 562         (the-display-just (calc-embedded-justify))
 563         (v gmodes)
 564         (changed nil)
 565         found value)
 566     (while v
 567       (or (symbolp (car v))
 568           (and (setq found (assq (car (car v)) modes))
 569                (not (eq (cdr found) 'default)))
 570           (and (setq found (assq (car (car v)) local-modes))
 571                (not (eq (cdr found) 'default)))
 572           (progn
 573             (if (eq (setq value (cdr (car v))) 'default)
 574                 (setq value (list (nth 1 (assq (car (car v)) calc-mode-var-list)))))
 575             (equal (symbol-value (car (car v))) value))
 576           (progn
 577             (setq changed t)
 578             (if temp (setq calc-embed-prev-modes
 579                            (cons (cons (car (car v))
 580                                        (symbol-value (car (car v))))
 581                                  calc-embed-prev-modes)))
 582             (set (car (car v)) value)))
 583       (setq v (cdr v)))
 584     (setq v modes)
 585     (while v
 586       (or (and (setq found (assq (car (car v)) local-modes))
 587                (not (eq (cdr found) 'default)))
 588           (eq (setq value (cdr (car v))) 'default)
 589           (equal (symbol-value (car (car v))) value)
 590           (progn
 591             (setq changed t)
 592             (if temp (setq calc-embed-prev-modes (cons (cons (car (car v))
 593                                                   (symbol-value (car (car v))))
 594                                             calc-embed-prev-modes)))
 595             (set (car (car v)) value)))
 596       (setq v (cdr v)))
 597     (setq v local-modes)
 598     (while v
 599       (or (eq (setq value (cdr (car v))) 'default)
 600           (equal (symbol-value (car (car v))) value)
 601           (progn
 602             (setq changed t)
 603             (if temp (setq calc-embed-prev-modes (cons (cons (car (car v))
 604                                                   (symbol-value (car (car v))))
 605                                             calc-embed-prev-modes)))
 606             (set (car (car v)) value)))
 607       (setq v (cdr v)))
 608     (and changed (not (eq temp t))
 609          (progn
 610            (calc-embedded-set-justify the-display-just)
 611            (calc-embedded-set-language the-language)))
 612     (and changed (not temp)
 613          (progn
 614            (setq calc-full-float-format (list (if (eq (car calc-float-format)
 615                                                       'fix)
 616                                                   'float
 617                                                 (car calc-float-format))
 618                                               0))
 619            (calc-refresh)))
 620     changed))
 621
 622 (defun calc-embedded-language ()
 623   (if calc-language-option
 624       (list calc-language calc-language-option)
 625     calc-language))
 626
 627 (defun calc-embedded-set-language (lang)
 628   (let ((option nil))
 629     (if (consp lang)
 630         (setq option (nth 1 lang)
 631               lang (car lang)))
 632     (or (and (eq lang calc-language)
 633              (equal option calc-language-option))
 634         (calc-set-language lang option t))))
 635
 636 (defun calc-embedded-justify ()
 637   (if calc-display-origin
 638       (list calc-display-just calc-display-origin)
 639     calc-display-just))
 640
 641 (defun calc-embedded-set-justify (just)
 642   (if (consp just)
 643       (setq calc-display-origin (nth 1 just)
 644             calc-display-just (car just))
 645     (setq calc-display-just just
 646           calc-display-origin nil)))
 647
 648
 649 (defun calc-find-globals ()
 650   (interactive)
 651   (and (eq major-mode 'calc-mode)
 652        (error "This command should be used in a normal editing buffer"))
 653   (make-local-variable 'calc-embedded-globals)
 654   (let ((case-fold-search nil)
 655         (modes nil)
 656         (save-pt (point))
 657         found value)
 658     (goto-char (point-min))
 659     (while (re-search-forward "\\[calc-global-mode: *\\([-a-z]+\\): *\\(\"\\([^\"\n\\]\\|\\\\.\\)*\"\\|[- ()a-zA-Z0-9]+\\)\\]" nil t)
 660       (and (setq found (assoc (buffer-substring (match-beginning 1)
 661                                                 (match-end 1))
 662                               calc-embedded-mode-vars))
 663            (or (assq (cdr found) modes)
 664                (setq modes (cons (cons (cdr found)
 665                                        (car (read-from-string
 666                                              (buffer-substring
 667                                               (match-beginning 2)
 668                                               (match-end 2)))))
 669                                  modes)))))
 670     (setq calc-embedded-globals (cons t modes))
 671     (goto-char save-pt)))
 672
 673 (defun calc-embedded-find-modes ()
 674   (let ((case-fold-search nil)
 675         (save-pt (point))
 676         (no-defaults t)
 677         (modes nil)
 678         (emodes nil)
 679         (pmodes nil)
 680         found value)
 681     (while (and no-defaults (search-backward "[calc-" nil t))
 682       (forward-char 6)
 683       (or (and (looking-at "mode: *\\([-a-z]+\\): *\\(\"\\([^\"\n\\]\\|\\\\.\\)*\"\\|[- ()a-zA-Z0-9]+\\)]")
 684                (setq found (assoc (buffer-substring (match-beginning 1)
 685                                                     (match-end 1))
 686                                   calc-embedded-mode-vars))
 687                (or (assq (cdr found) modes)
 688                    (setq modes (cons (cons (cdr found)
 689                                            (car (read-from-string
 690                                                  (buffer-substring
 691                                                   (match-beginning 2)
 692                                                   (match-end 2)))))
 693                                      modes))))
 694           (and (looking-at "perm-mode: *\\([-a-z]+\\): *\\(\"\\([^\"\n\\]\\|\\\\.\\)*\"\\|[- ()a-zA-Z0-9]+\\)]")
 695                (setq found (assoc (buffer-substring (match-beginning 1)
 696                                                     (match-end 1))
 697                                   calc-embedded-mode-vars))
 698                (or (assq (cdr found) pmodes)
 699                    (setq pmodes (cons (cons (cdr found)
 700                                             (car (read-from-string
 701                                                   (buffer-substring
 702                                                    (match-beginning 2)
 703                                                    (match-end 2)))))
 704                                       pmodes))))
 705           (and (looking-at "edit-mode: *\\([-a-z]+\\): *\\(\"\\([^\"\n\\]\\|\\\\.\\)*\"\\|[- ()a-zA-Z0-9]+\\)]")
 706                (setq found (assoc (buffer-substring (match-beginning 1)
 707                                                     (match-end 1))
 708                                   calc-embedded-mode-vars))
 709                (or (assq (cdr found) emodes)
 710                    (setq emodes (cons (cons (cdr found)
 711                                             (car (read-from-string
 712                                                   (buffer-substring
 713                                                    (match-beginning 2)
 714                                                    (match-end 2)))))
 715                                       emodes))))
 716           (and (looking-at "defaults]")
 717                (setq no-defaults nil)))
 718       (backward-char 6))
 719     (goto-char save-pt)
 720     (list modes emodes pmodes)))
 721
 722 ;; The variable calc-embed-vars-used is local to calc-embedded-make-info,
 723 ;; calc-embedded-evaluate-expr and calc-embedded-update, but is
 724 ;; used by calc-embedded-find-vars, which is called by the above functions.
 725 (defvar calc-embed-vars-used)
 726
 727 (defun calc-embedded-make-info (point cbuf fresh &optional
 728                                       calc-embed-top calc-embed-bot
 729                                       calc-embed-outer-top calc-embed-outer-bot)
 730   (let* ((bufentry (assq (current-buffer) calc-embedded-active))
 731          (found bufentry)
 732          (force (and fresh calc-embed-top))
 733          (fixed calc-embed-top)
 734          (new-info nil)
 735          info str)
 736     (or found
 737         (setq found (list (current-buffer))
 738               calc-embedded-active (cons found calc-embedded-active)))
 739     (while (and (cdr found)
 740                 (> point (aref (car (cdr found)) 3)))
 741       (setq found (cdr found)))
 742     (if (and (cdr found)
 743              (>= point (aref (nth 1 found) 2)))
 744         (setq info (nth 1 found))
 745       (setq info (make-vector 16 nil)
 746             new-info t
 747             fresh t)
 748       (aset info 0 (current-buffer))
 749       (aset info 1 (or cbuf (save-excursion
 750                               (calc-create-buffer)
 751                               (current-buffer)))))
 752     (if (and (integerp calc-embed-top) (not calc-embed-bot))
 753                                         ; started with a user-supplied argument
 754         (progn
 755           (if (= (setq arg (prefix-numeric-value arg)) 0)
 756               (progn
 757                 (aset info 2 (copy-marker (region-beginning)))
 758                 (aset info 3 (copy-marker (region-end))))
 759             (aset info (if (> arg 0) 2 3) (point-marker))
 760             (forward-line arg)
 761             (aset info (if (> arg 0) 3 2) (point-marker)))
 762           (aset info 4 (copy-marker (aref info 2)))
 763           (aset info 5 (copy-marker (aref info 3))))
 764       (if (aref info 4)
 765           (setq calc-embed-top (aref info 2)
 766                 fixed calc-embed-top)
 767         (if (consp calc-embed-top)
 768             (let ((calc-embedded-open-formula calc-embedded-open-word)
 769                   (calc-embedded-close-formula calc-embedded-close-word))
 770               (calc-embedded-find-bounds 'plain))
 771           (or calc-embed-top
 772               (calc-embedded-find-bounds 'plain)))
 773         (aset info 2 (copy-marker (min calc-embed-top calc-embed-bot)))
 774         (aset info 3 (copy-marker (max calc-embed-top calc-embed-bot)))
 775         (aset info 4 (copy-marker (or calc-embed-outer-top (aref info 2))))
 776         (aset info 5 (copy-marker (or calc-embed-outer-bot (aref info 3))))))
 777     (goto-char (aref info 2))
 778     (if new-info
 779         (progn
 780           (or (bolp) (aset info 7 t))
 781           (goto-char (aref info 3))
 782           (or (bolp) (eolp) (aset info 7 t))))
 783     (if fresh
 784         (let ((modes (calc-embedded-find-modes)))
 785           (aset info 12 (car modes))
 786           (aset info 13 (nth 1 modes))
 787           (aset info 14 (nth 2 modes))))
 788     (aset info 15 calc-embedded-globals)
 789     (setq str (buffer-substring (aref info 2) (aref info 3)))
 790     (if (or force
 791             (not (equal str (aref info 6))))
 792         (if (and fixed (aref info 6))
 793             (progn
 794               (aset info 4 nil)
 795               (calc-embedded-make-info point cbuf nil)
 796               (setq new-info nil))
 797           (let* ((open-plain calc-embedded-open-plain)
 798                  (close-plain calc-embedded-close-plain)
 799                  (pref-len (length open-plain))
 800                  (calc-embed-vars-used nil)
 801                  suff-pos val temp)
 802             (save-excursion
 803               (set-buffer (aref info 1))
 804               (calc-embedded-set-modes (aref info 15)
 805                                        (aref info 12) (aref info 14))
 806               (if (and (> (length str) pref-len)
 807                        (equal (substring str 0 pref-len) open-plain)
 808                        (setq suff-pos (string-match (regexp-quote close-plain)
 809                                                     str pref-len)))
 810                   (setq val (math-read-plain-expr
 811                              (substring str pref-len suff-pos)))
 812                 (if (string-match "[^ \t\n]" str)
 813                     (setq pref-len 0
 814                           val (math-read-big-expr str))
 815                   (setq val nil))))
 816             (if (eq (car-safe val) 'error)
 817                 (setq val (list 'error
 818                                 (+ (aref info 2) pref-len (nth 1 val))
 819                                 (nth 2 val))))
 820             (aset info 6 str)
 821             (aset info 8 val)
 822             (setq temp val)
 823             (if (eq (car-safe temp) 'calcFunc-evalto)
 824                 (setq temp (nth 1 temp))
 825               (if (eq (car-safe temp) 'error)
 826                   (if new-info
 827                       (setq new-info nil)
 828                     (setcdr found (delq info (cdr found)))
 829                     (calc-embedded-active-state 'less))))
 830             (aset info 9 (and (eq (car-safe temp) 'calcFunc-assign)
 831                               (nth 1 temp)))
 832             (if (memq (car-safe val) '(calcFunc-evalto calcFunc-assign))
 833                 (calc-embedded-find-vars val))
 834             (aset info 10 calc-embed-vars-used)
 835             (aset info 11 nil))))
 836     (if new-info
 837         (progn
 838           (setcdr found (cons info (cdr found)))
 839           (calc-embedded-active-state 'more)))
 840     info))
 841
 842 (defun calc-embedded-find-vars (x)
 843   (cond ((Math-primp x)
 844          (and (eq (car-safe x) 'var)
 845               (not (assoc x calc-embed-vars-used))
 846               (setq calc-embed-vars-used (cons (list x) calc-embed-vars-used))))
 847         ((eq (car x) 'calcFunc-evalto)
 848          (calc-embedded-find-vars (nth 1 x)))
 849         ((eq (car x) 'calcFunc-assign)
 850          (calc-embedded-find-vars (nth 2 x)))
 851         (t
 852          (and (eq (car x) 'calcFunc-subscr)
 853               (eq (car-safe (nth 1 x)) 'var)
 854               (Math-primp (nth 2 x))
 855               (not (assoc x calc-embed-vars-used))
 856               (setq calc-embed-vars-used (cons (list x) calc-embed-vars-used)))
 857          (while (setq x (cdr x))
 858            (calc-embedded-find-vars (car x))))))
 859
 860
 861 (defun calc-embedded-evaluate-expr (x)
 862   (let ((calc-embed-vars-used (aref calc-embedded-info 10)))
 863     (or calc-embed-vars-used (calc-embedded-find-vars x))
 864     (if calc-embed-vars-used
 865         (let ((active (assq (aref calc-embedded-info 0) calc-embedded-active))
 866               (args nil))
 867           (save-excursion
 868             (calc-embedded-original-buffer t)
 869             (or active
 870                 (progn
 871                   (calc-embedded-activate)
 872                   (setq active (assq (aref calc-embedded-info 0)
 873                                      calc-embedded-active))))
 874             (while calc-embed-vars-used
 875               (calc-embedded-eval-get-var (car (car calc-embed-vars-used)) active)
 876               (setq calc-embed-vars-used (cdr calc-embed-vars-used))))
 877           (calc-embedded-subst x))
 878       (calc-normalize (math-evaluate-expr-rec x)))))
 879
 880 (defun calc-embedded-subst (x)
 881   (if (and (eq (car-safe x) 'calcFunc-evalto) (cdr x))
 882       (let ((rhs (calc-embedded-subst (nth 1 x))))
 883         (list 'calcFunc-evalto
 884               (nth 1 x)
 885               (if (eq (car-safe rhs) 'calcFunc-assign) (nth 2 rhs) rhs)))
 886     (if (and (eq (car-safe x) 'calcFunc-assign) (= (length x) 3))
 887         (list 'calcFunc-assign
 888               (nth 1 x)
 889               (calc-embedded-subst (nth 2 x)))
 890       (calc-normalize (math-evaluate-expr-rec (math-multi-subst x nil nil))))))
 891
 892 (defun calc-embedded-eval-get-var (var base)
 893   (let ((entry base)
 894         (point (aref calc-embedded-info 2))
 895         (last nil)
 896         val)
 897     (while (and (setq entry (cdr entry))
 898                 (or (not (equal var (aref (car entry) 9)))
 899                     (and (> point (aref (car entry) 3))
 900                          (setq last entry)))))
 901     (if last
 902         (setq entry last))
 903     (if entry
 904         (progn
 905           (setq entry (car entry))
 906           (if (equal (buffer-substring (aref entry 2) (aref entry 3))
 907                      (aref entry 6))
 908               (progn
 909                 (or (aref entry 11)
 910                     (save-excursion
 911                       (calc-embedded-update entry 14 t nil)))
 912                 (setq val (aref entry 11))
 913                 (if (eq (car-safe val) 'calcFunc-evalto)
 914                     (setq val (nth 2 val)))
 915                 (if (eq (car-safe val) 'calcFunc-assign)
 916                     (setq val (nth 2 val)))
 917                 (setq args (cons (cons var val) args)))
 918             (calc-embedded-activate)
 919             (calc-embedded-eval-get-var var base))))))
 920
 921
 922 (defun calc-embedded-update (info which need-eval need-display
 923                                   &optional str entry old-val)
 924   (let* ((calc-embed-prev-modes nil)
 925          (open-plain calc-embedded-open-plain)
 926          (close-plain calc-embedded-close-plain)
 927          (calc-embed-vars-used nil)
 928          (evalled nil)
 929          (val (aref info 8))
 930          (old-eval (aref info 11)))
 931     (or old-val (setq old-val val))
 932     (if (eq (car-safe val) 'calcFunc-evalto)
 933         (setq need-display t))
 934     (unwind-protect
 935         (progn
 936           (set-buffer (aref info 1))
 937           (and which
 938                (calc-embedded-set-modes (aref info 15) (aref info 12)
 939                                         (aref info which)
 940                                         (if need-display 'full t)))
 941           (if (memq (car-safe val) '(calcFunc-evalto calcFunc-assign))
 942               (calc-embedded-find-vars val))
 943           (if need-eval
 944               (let ((calc-embedded-info info))
 945                 (setq val (math-evaluate-expr val)
 946                       evalled val)))
 947           (if (or (eq need-eval 'eval) (eq (car-safe val) 'calcFunc-evalto))
 948               (aset info 8 val))
 949           (aset info 9 nil)
 950           (aset info 10 calc-embed-vars-used)
 951           (aset info 11 nil)
 952           (if (or need-display (eq (car-safe val) 'calcFunc-evalto))
 953               (let ((extra (if (eq calc-language 'big) 1 0)))
 954                 (or entry (setq entry (list val 1 nil)))
 955                 (or str (progn
 956                           (setq str (let ((calc-line-numbering nil))
 957                                       (math-format-stack-value entry)))
 958                           (if (eq calc-language 'big)
 959                               (setq str (substring str 0 -1)))))
 960                 (and calc-show-plain
 961                      (setq str (concat open-plain
 962                                        (math-showing-full-precision
 963                                         (math-format-flat-expr val 0))
 964                                        close-plain
 965                                        str)))
 966                 (save-excursion
 967                   (calc-embedded-original-buffer t info)
 968                   (or (equal str (aref info 6))
 969                       (let ((delta (- (aref info 5) (aref info 3)))
 970                             (adjbot 0)
 971                             (buffer-read-only nil))
 972                         (goto-char (aref info 2))
 973                         (delete-region (point) (aref info 3))
 974                         (and (> (nth 1 entry) (1+ extra))
 975                              (aref info 7)
 976                              (progn
 977                                (delete-horizontal-space)
 978                                (if (looking-at "\n")
 979                                    ;; If there's a newline there, don't add one
 980                                    (insert "\n")
 981                                  (insert "\n\n")
 982                                  (delete-horizontal-space)
 983                                  (setq adjbot 1)
 984 ;                               (setq delta (1+ delta))
 985                                  (backward-char 1))))
 986                         (insert str)
 987                         (set-marker (aref info 3) (+ (point) adjbot))
 988                         (set-marker (aref info 5) (+ (point) delta))
 989                         (aset info 6 str))))))
 990           (if (eq (car-safe val) 'calcFunc-evalto)
 991               (progn
 992                 (setq evalled (nth 2 val)
 993                       val (nth 1 val))))
 994           (if (eq (car-safe val) 'calcFunc-assign)
 995               (progn
 996                 (aset info 9 (nth 1 val))
 997                 (aset info 11 (or evalled
 998                                   (let ((calc-embedded-info info))
 999                                     (math-evaluate-expr (nth 2 val)))))
1000                 (or (equal old-eval (aref info 11))
1001                     (calc-embedded-var-change (nth 1 val) (aref info 0))))
1002             (if (eq (car-safe old-val) 'calcFunc-evalto)
1003                 (setq old-val (nth 1 old-val)))
1004             (if (eq (car-safe old-val) 'calcFunc-assign)
1005                 (calc-embedded-var-change (nth 1 old-val) (aref info 0)))))
1006       (set-buffer (aref info 1))
1007       (while calc-embed-prev-modes
1008         (cond ((eq (car (car calc-embed-prev-modes)) 'the-language)
1009                (if need-display
1010                    (calc-embedded-set-language (cdr (car calc-embed-prev-modes)))))
1011               ((eq (car (car calc-embed-prev-modes)) 'the-display-just)
1012                (if need-display
1013                    (calc-embedded-set-justify (cdr (car calc-embed-prev-modes)))))
1014               (t
1015                (set (car (car calc-embed-prev-modes))
1016                     (cdr (car calc-embed-prev-modes)))))
1017         (setq calc-embed-prev-modes (cdr calc-embed-prev-modes))))))
1018
1019
1020
1021
1022 ;;; These are hooks called by the main part of Calc.
1023
1024 (defvar calc-embedded-no-reselect nil)
1025 (defun calc-embedded-select-buffer ()
1026   (if (eq (current-buffer) (aref calc-embedded-info 0))
1027       (let ((info calc-embedded-info)
1028             horiz vert)
1029         (if (and (or (< (point) (aref info 4))
1030                      (> (point) (aref info 5)))
1031                  (not calc-embedded-no-reselect))
1032             (let ((calc-embedded-quiet t))
1033               (message "(Switching Calc Embedded mode to new formula.)")
1034               (calc-embedded nil)
1035               (calc-embedded nil)))
1036         (setq horiz (max (min (current-column) (- (point) (aref info 2))) 0)
1037               vert (if (<= (aref info 2) (point))
1038                        (- (count-lines (aref info 2) (point))
1039                           (if (bolp) 0 1))
1040                      0))
1041         (set-buffer (aref info 1))
1042         (if calc-show-plain
1043             (if (= vert 0)
1044                 (setq horiz 0)
1045               (setq vert (1- vert))))
1046         (calc-cursor-stack-index 1)
1047         (if calc-line-numbering
1048             (setq horiz (+ horiz 4)))
1049         (if (> vert 0)
1050             (forward-line vert))
1051         (forward-char (min horiz
1052                            (- (point-max) (point)))))
1053     (calc-select-buffer)))
1054
1055 (defun calc-embedded-finish-command ()
1056   (let ((buf (current-buffer))
1057         horiz vert)
1058     (save-excursion
1059       (set-buffer (aref calc-embedded-info 1))
1060       (if (> (calc-stack-size) 0)
1061           (let ((pt (point))
1062                 (col (current-column))
1063                 (bol (bolp)))
1064             (calc-cursor-stack-index 0)
1065             (if (< pt (point))
1066                 (progn
1067                   (calc-cursor-stack-index 1)
1068                   (if (>= pt (point))
1069                       (progn
1070                         (setq horiz (- col (if calc-line-numbering 4 0))
1071                               vert (- (count-lines (point) pt)
1072                                       (if bol 0 1)))
1073                         (if calc-show-plain
1074                             (setq vert (max 1 (1+ vert))))))))
1075             (goto-char pt))))
1076     (if horiz
1077         (progn
1078           (set-buffer (aref calc-embedded-info 0))
1079           (goto-char (aref calc-embedded-info 2))
1080           (if (> vert 0)
1081               (forward-line vert))
1082           (forward-char (max horiz 0))
1083           (set-buffer buf)))))
1084
1085 (defun calc-embedded-stack-change ()
1086   (or calc-executing-macro
1087       (save-excursion
1088         (set-buffer (aref calc-embedded-info 1))
1089         (let* ((info calc-embedded-info)
1090                (extra-line (if (eq calc-language 'big) 1 0))
1091                (the-point (point))
1092                (empty (= (calc-stack-size) 0))
1093                (entry (if empty
1094                           (list '(var empty var-empty) 1 nil)
1095                         (calc-top 1 'entry)))
1096                (old-val (aref info 8))
1097                top bot str)
1098           (if empty
1099               (setq str "empty")
1100             (save-excursion
1101               (calc-cursor-stack-index 1)
1102               (setq top (point))
1103               (calc-cursor-stack-index 0)
1104               (setq bot (- (point) extra-line))
1105               (setq str (buffer-substring top (- bot 1))))
1106             (if calc-line-numbering
1107                 (let ((pos 0))
1108                   (setq str (substring str 4))
1109                   (while (setq pos (string-match "\n...." str pos))
1110                     (setq str (concat (substring str 0 (1+ pos))
1111                                       (substring str (+ pos 5)))
1112                           pos (1+ pos))))))
1113           (calc-embedded-original-buffer t)
1114           (aset info 8 (car entry))
1115           (calc-embedded-update info 13 nil t str entry old-val)))))
1116
1117 (defun calc-embedded-mode-line-change ()
1118   (let ((str mode-line-buffer-identification))
1119     (save-excursion
1120       (calc-embedded-original-buffer t)
1121       (setq mode-line-buffer-identification str)
1122       (set-buffer-modified-p (buffer-modified-p)))))
1123
1124 (defun calc-embedded-modes-change (vars)
1125   (if (eq (car vars) 'calc-language) (setq vars '(the-language)))
1126   (if (eq (car vars) 'calc-display-just) (setq vars '(the-display-just)))
1127   (while (and vars
1128               (not (rassq (car vars) calc-embedded-mode-vars)))
1129     (setq vars (cdr vars)))
1130   (if (and vars calc-mode-save-mode (not (eq calc-mode-save-mode 'save)))
1131       (save-excursion
1132         (let* ((save-mode calc-mode-save-mode)
1133                (header (if (eq save-mode 'local)
1134                            "calc-mode:"
1135                          (format "calc-%s-mode:" save-mode)))
1136                (the-language (calc-embedded-language))
1137                (the-display-just (calc-embedded-justify))
1138                (values (mapcar 'symbol-value vars))
1139                (num (cond ((eq save-mode 'local) 12)
1140                           ((eq save-mode 'edit) 13)
1141                           ((eq save-mode 'perm) 14)
1142                           (t nil)))
1143                base limit mname mlist)
1144           (calc-embedded-original-buffer t)
1145           (save-excursion
1146             (if (eq save-mode 'global)
1147                 (setq base (point-max)
1148                       limit (point-min)
1149                       mlist calc-embedded-globals)
1150               (goto-char (aref calc-embedded-info 4))
1151               (beginning-of-line)
1152               (setq base (point)
1153                     limit (max (- (point) 1000) (point-min))
1154                     mlist (and num (aref calc-embedded-info num)))
1155               (and (re-search-backward
1156                     (format "\\(%s\\)[^\001]*\\(%s\\)\\|\\[calc-defaults]"
1157                             calc-embedded-open-formula
1158                             calc-embedded-close-formula) limit t)
1159                    (setq limit (point))))
1160             (while vars
1161               (goto-char base)
1162               (if (setq mname (car (rassq (car vars)
1163                                           calc-embedded-mode-vars)))
1164                   (let ((buffer-read-only nil)
1165                         (found (assq (car vars) mlist)))
1166                     (if found
1167                         (setcdr found (car values))
1168                       (setq mlist (cons (cons (car vars) (car values)) mlist))
1169                       (if num
1170                           (aset calc-embedded-info num mlist)
1171                         (if (eq save-mode 'global)
1172                             (setq calc-embedded-globals mlist))))
1173                     (if (re-search-backward
1174                          (format "\\[%s *%s: *\\(\"\\([^\"\n\\]\\|\\\\.\\)*\"\\|[- ()a-zA-Z0-9]+\\)]"
1175                                  header mname)
1176                          limit t)
1177                         (progn
1178                           (goto-char (match-beginning 1))
1179                           (delete-region (point) (match-end 1))
1180                           (insert (prin1-to-string (car values))))
1181                       (goto-char base)
1182                       (insert-before-markers
1183                        calc-embedded-open-mode
1184                        "[" header " " mname ": "
1185                        (prin1-to-string (car values)) "]"
1186                        calc-embedded-close-mode))))
1187               (setq vars (cdr vars)
1188                     values (cdr values))))))))
1189
1190 (defun calc-embedded-var-change (var &optional buf)
1191   (if (symbolp var)
1192       (setq var (list 'var
1193                       (if (string-match "\\`var-.+\\'"
1194                                         (symbol-name var))
1195                           (intern (substring (symbol-name var) 4))
1196                         var)
1197                       var)))
1198   (save-excursion
1199     (let ((manual (not calc-auto-recompute))
1200           (bp calc-embedded-active)
1201           (first t))
1202       (if buf (setq bp (memq (assq buf bp) bp)))
1203       (while bp
1204         (let ((calc-embedded-no-reselect t)
1205               (p (and (buffer-name (car (car bp)))
1206                       (cdr (car bp)))))
1207           (while p
1208             (if (assoc var (aref (car p) 10))
1209                 (if manual
1210                     (if (aref (car p) 11)
1211                         (progn
1212                           (aset (car p) 11 nil)
1213                           (if (aref (car p) 9)
1214                               (calc-embedded-var-change (aref (car p) 9)))))
1215                   (set-buffer (aref (car p) 0))
1216                   (if (equal (buffer-substring (aref (car p) 2)
1217                                                (aref (car p) 3))
1218                              (aref (car p) 6))
1219                       (let ((calc-embedded-info nil))
1220                         (or calc-embedded-quiet
1221                             (message "Recomputing..."))
1222                         (setq first nil)
1223                         (calc-wrapper
1224                          (set-buffer (aref (car p) 0))
1225                          (calc-embedded-update (car p) 14 t nil)))
1226                     (setcdr (car bp) (delq (car p) (cdr (car bp))))
1227                     (message
1228                      "(Tried to recompute but formula was changed or missing)"))))
1229             (setq p (cdr p))))
1230         (setq bp (if buf nil (cdr bp))))
1231       (or first calc-embedded-quiet (message "")))))
1232
1233 (provide 'calc-embed)
1234
1235 ;;; arch-tag: 1b8f311e-fba1-40d3-b8c3-1d6f68fd26fc
1236 ;;; calc-embed.el ends here