lisp/calc/calc-keypd.el

   1 ;;; calc-keypd.el --- mouse-capable keypad input for Calc
   2
   3 ;; Copyright (C) 1990, 1991, 1992, 1993, 2001, 2005 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 (defvar calc-keypad-buffer nil)
  35 (defvar calc-keypad-menu 0)
  36 (defvar calc-keypad-full-layout nil)
  37 (defvar calc-keypad-input nil)
  38 (defvar calc-keypad-prev-input nil)
  39 (defvar calc-keypad-said-hello nil)
  40
  41 ;;; |----+----+----+----+----+----|
  42 ;;; |  ENTER  |+/- |EEX |UNDO| <- |
  43 ;;; |-----+---+-+--+--+-+---++----|
  44 ;;; | INV |  7  |  8  |  9  |  /  |
  45 ;;; |-----+-----+-----+-----+-----|
  46 ;;; | HYP |  4  |  5  |  6  |  *  |
  47 ;;; |-----+-----+-----+-----+-----|
  48 ;;; |EXEC |  1  |  2  |  3  |  -  |
  49 ;;; |-----+-----+-----+-----+-----|
  50 ;;; | OFF |  0  |  .  | PI  |  +  |
  51 ;;; |-----+-----+-----+-----+-----|
  52 (defvar calc-keypad-layout
  53   '( ( ( "ENTER" calc-enter calc-roll-down calc-roll-up calc-over )
  54        ( "ENTER" calc-enter calc-roll-down calc-roll-up calc-over )
  55        ( "+/-"   calc-change-sign calc-inv (progn -4 calc-pack) )
  56        ( "EEX"   ("e") (progn calc-num-prefix calc-pack-interval)
  57                  (progn -5 calc-pack)  )
  58        ( "UNDO"  calc-undo calc-redo calc-last-args )
  59        ( "<-"    calc-pop (progn 0 calc-pop)
  60                  (progn calc-num-prefix calc-pop) ) )
  61      ( ( "INV"   calc-inverse )
  62        ( "7"     ("7") calc-round )
  63        ( "8"     ("8") (progn 2 calc-clean-num) )
  64        ( "9"     ("9") calc-float )
  65        ( "/"     calc-divide (progn calc-inverse calc-power) ) )
  66      ( ( "HYP"   calc-hyperbolic )
  67        ( "4"     ("4") calc-ln calc-log10 )
  68        ( "5"     ("5") calc-exp calc-exp10 )
  69        ( "6"     ("6") calc-abs )
  70        ( "*"     calc-times calc-power ) )
  71      ( ( "EXEC"  calc-keypad-execute )
  72        ( "1"     ("1") calc-arcsin calc-sin )
  73        ( "2"     ("2") calc-arccos calc-cos )
  74        ( "3"     ("3") calc-arctan calc-tan )
  75        ( "-"     calc-minus calc-conj ) )
  76      ( ( "OFF"   calc-keypad-off )
  77        ( "0"     ("0") calc-imaginary )
  78        ( "."     (".") calc-precision )
  79        ( "PI"    calc-pi )
  80        ( "+"     calc-plus calc-sqrt ) ) ))
  81
  82 (defvar calc-keypad-menus '( calc-keypad-math-menu
  83                              calc-keypad-funcs-menu
  84                              calc-keypad-binary-menu
  85                              calc-keypad-vector-menu
  86                              calc-keypad-modes-menu
  87                              calc-keypad-user-menu ) )
  88
  89 ;;; |----+----+----+----+----+----|
  90 ;;; |FLR |CEIL|RND |TRNC|CLN2|FLT |
  91 ;;; |----+----+----+----+----+----|
  92 ;;; | LN |EXP |    |ABS |IDIV|MOD |
  93 ;;; |----+----+----+----+----+----|
  94 ;;; |SIN |COS |TAN |SQRT|y^x |1/x |
  95
  96 (defvar calc-keypad-math-menu
  97   '( ( ( "FLR"   calc-floor )
  98        ( "CEIL"  calc-ceiling )
  99        ( "RND"   calc-round )
 100        ( "TRNC"  calc-trunc )
 101        ( "CLN2"  (progn 2 calc-clean-num) )
 102        ( "FLT"   calc-float ) )
 103      ( ( "LN"    calc-ln )
 104        ( "EXP"   calc-exp )
 105        ( ""      nil )
 106        ( "ABS"   calc-abs )
 107        ( "IDIV"  calc-idiv )
 108        ( "MOD"   calc-mod ) )
 109      ( ( "SIN"   calc-sin )
 110        ( "COS"   calc-cos )
 111        ( "TAN"   calc-tan )
 112        ( "SQRT"  calc-sqrt )
 113        ( "y^x"   calc-power )
 114        ( "1/x"   calc-inv ) ) ))
 115
 116 ;;; |----+----+----+----+----+----|
 117 ;;; |IGAM|BETA|IBET|ERF |BESJ|BESY|
 118 ;;; |----+----+----+----+----+----|
 119 ;;; |IMAG|CONJ| RE |ATN2|RAND|RAGN|
 120 ;;; |----+----+----+----+----+----|
 121 ;;; |GCD |FACT|DFCT|BNOM|PERM|NXTP|
 122
 123 (defvar calc-keypad-funcs-menu
 124   '( ( ( "IGAM"  calc-inc-gamma )
 125        ( "BETA"  calc-beta )
 126        ( "IBET"  calc-inc-beta )
 127        ( "ERF"   calc-erf )
 128        ( "BESJ"  calc-bessel-J )
 129        ( "BESY"  calc-bessel-Y ) )
 130      ( ( "IMAG"  calc-imaginary )
 131        ( "CONJ"  calc-conj )
 132        ( "RE"    calc-re calc-im )
 133        ( "ATN2"  calc-arctan2 )
 134        ( "RAND"  calc-random )
 135        ( "RAGN"  calc-random-again ) )
 136      ( ( "GCD"   calc-gcd calc-lcm )
 137        ( "FACT"  calc-factorial calc-gamma )
 138        ( "DFCT"  calc-double-factorial )
 139        ( "BNOM"  calc-choose )
 140        ( "PERM"  calc-perm )
 141        ( "NXTP"  calc-next-prime calc-prev-prime ) ) ))
 142
 143 ;;; |----+----+----+----+----+----|
 144 ;;; |AND | OR |XOR |NOT |LSH |RSH |
 145 ;;; |----+----+----+----+----+----|
 146 ;;; |DEC |HEX |OCT |BIN |WSIZ|ARSH|
 147 ;;; |----+----+----+----+----+----|
 148 ;;; | A  | B  | C  | D  | E  | F  |
 149
 150 (defvar calc-keypad-binary-menu
 151   '( ( ( "AND"   calc-and calc-diff )
 152        ( "OR"    calc-or )
 153        ( "XOR"   calc-xor )
 154        ( "NOT"   calc-not calc-clip )
 155        ( "LSH"   calc-lshift-binary calc-rotate-binary )
 156        ( "RSH"   calc-rshift-binary ) )
 157      ( ( "DEC"   calc-decimal-radix )
 158        ( "HEX"   calc-hex-radix )
 159        ( "OCT"   calc-octal-radix )
 160        ( "BIN"   calc-binary-radix )
 161        ( "WSIZ"  calc-word-size )
 162        ( "ARSH"  calc-rshift-arith ) )
 163      ( ( "A"     ("A") )
 164        ( "B"     ("B") )
 165        ( "C"     ("C") )
 166        ( "D"     ("D") )
 167        ( "E"     ("E") )
 168        ( "F"     ("F") ) ) ))
 169
 170 ;;; |----+----+----+----+----+----|
 171 ;;; |SUM |PROD|MAX |MAP*|MAP^|MAP$|
 172 ;;; |----+----+----+----+----+----|
 173 ;;; |INV |DET |TRN |IDNT|CRSS|"x" |
 174 ;;; |----+----+----+----+----+----|
 175 ;;; |PACK|UNPK|INDX|BLD |LEN |... |
 176
 177 (defvar calc-keypad-vector-menu
 178   '( ( ( "SUM"   calc-vector-sum calc-vector-alt-sum calc-vector-mean )
 179        ( "PROD"  calc-vector-product nil calc-vector-sdev )
 180        ( "MAX"   calc-vector-max calc-vector-min calc-vector-median )
 181        ( "MAP*"  (lambda () (interactive)
 182                    (calc-map '(2 calcFunc-mul "*"))) )
 183        ( "MAP^"  (lambda () (interactive)
 184                    (calc-map '(2 calcFunc-pow "^"))) )
 185        ( "MAP$"  calc-map-stack ) )
 186      ( ( "MINV"  calc-inv )
 187        ( "MDET"  calc-mdet )
 188        ( "MTRN"  calc-transpose calc-conj-transpose )
 189        ( "IDNT"  (progn calc-num-prefix calc-ident) )
 190        ( "CRSS"  calc-cross )
 191        ( "\"x\"" "\excalc-algebraic-entry\rx\r"
 192                  "\excalc-algebraic-entry\ry\r"
 193                  "\excalc-algebraic-entry\rz\r"
 194                  "\excalc-algebraic-entry\rt\r") )
 195      ( ( "PACK"  calc-pack )
 196        ( "UNPK"  calc-unpack )
 197        ( "INDX"  (progn calc-num-prefix calc-index) "\C-u\excalc-index\r" )
 198        ( "BLD"   (progn calc-num-prefix calc-build-vector) )
 199        ( "LEN"   calc-vlength )
 200        ( "..."   calc-full-vectors ) ) ))
 201
 202 ;;; |----+----+----+----+----+----|
 203 ;;; |FLT |FIX |SCI |ENG |GRP |    |
 204 ;;; |----+----+----+----+----+----|
 205 ;;; |RAD |DEG |FRAC|POLR|SYMB|PREC|
 206 ;;; |----+----+----+----+----+----|
 207 ;;; |SWAP|RLL3|RLL4|OVER|STO |RCL |
 208
 209 (defvar calc-keypad-modes-menu
 210   '( ( ( "FLT"   calc-normal-notation
 211                  (progn calc-num-prefix calc-normal-notation) )
 212        ( "FIX"   (progn 2 calc-fix-notation)
 213                  (progn calc-num-prefix calc-fix-notation) )
 214        ( "SCI"   calc-sci-notation
 215                  (progn calc-num-prefix calc-sci-notation) )
 216        ( "ENG"   calc-eng-notation
 217                  (progn calc-num-prefix calc-eng-notation) )
 218        ( "GRP"   calc-group-digits "\C-u-3\excalc-group-digits\r" )
 219        ( ""      nil ) )
 220      ( ( "RAD"   calc-radians-mode )
 221        ( "DEG"   calc-degrees-mode )
 222        ( "FRAC"  calc-frac-mode )
 223        ( "POLR"  calc-polar-mode )
 224        ( "SYMB"  calc-symbolic-mode )
 225        ( "PREC"  calc-precision ) )
 226      ( ( "SWAP"  calc-roll-down )
 227        ( "RLL3"  (progn 3 calc-roll-up) (progn 3 calc-roll-down) )
 228        ( "RLL4"  (progn 4 calc-roll-up) (progn 4 calc-roll-down) )
 229        ( "OVER"  calc-over )
 230        ( "STO"   calc-keypad-store )
 231        ( "RCL"   calc-keypad-recall ) ) ))
 232
 233 (define-derived-mode calc-keypad-mode fundamental-mode "Calculator"
 234   "Major mode for Calc keypad input."
 235   (define-key calc-keypad-mode-map " " 'calc-keypad-press)
 236   (define-key calc-keypad-mode-map (kbd "RET") 'calc-keypad-press)
 237   (define-key calc-keypad-mode-map (kbd "TAB") 'calc-keypad-menu)
 238   (define-key calc-keypad-mode-map "q" 'calc-keypad-off)
 239   (define-key calc-keypad-mode-map [down-mouse-1] 'ignore)
 240   (define-key calc-keypad-mode-map [drag-mouse-1] 'ignore)
 241   (define-key calc-keypad-mode-map [double-mouse-1] 'ignore)
 242   (define-key calc-keypad-mode-map [triple-mouse-1] 'ignore)
 243   (define-key calc-keypad-mode-map [down-mouse-2] 'ignore)
 244   (define-key calc-keypad-mode-map [drag-mouse-2] 'ignore)
 245   (define-key calc-keypad-mode-map [double-mouse-2] 'ignore)
 246   (define-key calc-keypad-mode-map [triple-mouse-2] 'ignore)
 247   (define-key calc-keypad-mode-map [down-mouse-3] 'ignore)
 248   (define-key calc-keypad-mode-map [drag-mouse-3] 'ignore)
 249   (define-key calc-keypad-mode-map [double-mouse-3] 'ignore)
 250   (define-key calc-keypad-mode-map [triple-mouse-3] 'ignore)
 251   (define-key calc-keypad-mode-map [mouse-3] 'calc-keypad-right-click)
 252   (define-key calc-keypad-mode-map [mouse-2] 'calc-keypad-middle-click)
 253   (define-key calc-keypad-mode-map [mouse-1] 'calc-keypad-left-click)
 254   (put 'calc-keypad-mode 'mode-class 'special)
 255   (make-local-variable 'calc-main-buffer))
 256
 257 (defun calc-do-keypad (&optional full-display interactive)
 258   (calc-create-buffer)
 259   (let ((calcbuf (current-buffer)))
 260     (unless (bufferp calc-keypad-buffer)
 261       (set-buffer (setq calc-keypad-buffer (get-buffer-create "*Calc Keypad*")))
 262       (calc-keypad-mode)
 263       (setq calc-main-buffer calcbuf)
 264       (calc-keypad-redraw)
 265       (calc-trail-buffer))
 266     (let ((width 29)
 267           (height 17)
 268           win old-win)
 269       (if (setq win (get-buffer-window "*Calculator*"))
 270           (delete-window win))
 271       (if (setq win (get-buffer-window "*Calc Trail*"))
 272           (if (one-window-p)
 273               (switch-to-buffer (other-buffer))
 274             (delete-window win)))
 275       (if (setq win (get-buffer-window calc-keypad-buffer))
 276           (progn
 277             (bury-buffer "*Calculator*")
 278             (bury-buffer "*Calc Trail*")
 279             (bury-buffer calc-keypad-buffer)
 280             (if (one-window-p)
 281                 (switch-to-buffer (other-buffer))
 282               (delete-window win)))
 283         (setq calc-was-keypad-mode t
 284               old-win (get-largest-window))
 285         (if (or (< (window-height old-win) (+ height 6))
 286                 (< (window-width old-win) (+ width 15))
 287                 full-display)
 288             (delete-other-windows old-win))
 289         (if (< (window-height old-win) (+ height 4))
 290             (error "Screen is not tall enough for this mode"))
 291         (if full-display
 292             (progn
 293               (setq win (split-window old-win (- (window-height old-win)
 294                                                  height 1)))
 295               (set-window-buffer old-win (calc-trail-buffer))
 296               (set-window-buffer win calc-keypad-buffer)
 297               (set-window-start win 1)
 298               (setq win (split-window win (+ width 3) t))
 299               (set-window-buffer win calcbuf))
 300           (if (or t  ; left-side keypad not yet fully implemented
 301                   (< (save-excursion
 302                        (set-buffer (window-buffer old-win))
 303                        (current-column))
 304                      (/ (window-width) 2)))
 305               (setq win (split-window old-win (- (window-width old-win)
 306                                                  width 2)
 307                                       t))
 308             (setq old-win (split-window old-win (+ width 2) t)))
 309           (set-window-buffer win calc-keypad-buffer)
 310           (set-window-start win 1)
 311           (split-window win (- (window-height win) height 1))
 312           (set-window-buffer win calcbuf))
 313         (select-window old-win)
 314         (message "Welcome to GNU Emacs Calc!  Use the left and right mouse buttons")
 315         (run-hooks 'calc-keypad-start-hook)
 316         (and calc-keypad-said-hello interactive
 317              (progn
 318                (sit-for 2)
 319                (message "")))
 320         (setq calc-keypad-said-hello t)))
 321     (setq calc-keypad-input nil)))
 322
 323 (defun calc-keypad-off ()
 324   (interactive)
 325   (if calc-standalone-flag
 326       (save-buffers-kill-emacs nil)
 327     (calc-keypad)))
 328
 329 (defun calc-keypad-redraw ()
 330   (set-buffer calc-keypad-buffer)
 331   (setq buffer-read-only t)
 332   (setq calc-keypad-full-layout (append (symbol-value (nth calc-keypad-menu
 333                                                            calc-keypad-menus))
 334                                         calc-keypad-layout))
 335   (let ((buffer-read-only nil)
 336         (row calc-keypad-full-layout)
 337         (y 0))
 338     (erase-buffer)
 339     (insert "\n")
 340     (while row
 341       (let ((col (car row)))
 342         (while col
 343           (let* ((key (car col))
 344                  (cwid (if (>= y 4)
 345                            5
 346                          (if (and (= y 3) (eq col (car row)))
 347                              (progn (setq col (cdr col)) 9)
 348                            4)))
 349                  (name (if (and calc-standalone-flag
 350                                 (eq (nth 1 key) 'calc-keypad-off))
 351                            "EXIT"
 352                          (if (> (length (car key)) cwid)
 353                              (substring (car key) 0 cwid)
 354                            (car key))))
 355                  (wid (length name))
 356                  (pad (- cwid (/ wid 2))))
 357             (insert (make-string (/ (- cwid wid) 2) 32)
 358                     name
 359                     (make-string (/ (- cwid wid -1) 2) 32)
 360                     (if (equal name "MENU")
 361                         (int-to-string (1+ calc-keypad-menu))
 362                       "|")))
 363           (or (setq col (cdr col))
 364               (insert "\n")))
 365         (insert (if (>= y 4)
 366                     "-----+-----+-----+-----+-----"
 367                   (if (= y 3)
 368                       "-----+---+-+--+--+-+---++----"
 369                     "----+----+----+----+----+----"))
 370                 (if (= y 7) "+\n" "|\n"))
 371         (setq y (1+ y)
 372               row (cdr row)))))
 373   (setq calc-keypad-prev-input t)
 374   (calc-keypad-show-input)
 375   (goto-char (point-min)))
 376
 377 (defun calc-keypad-show-input ()
 378   (or (equal calc-keypad-input calc-keypad-prev-input)
 379       (let ((buffer-read-only nil))
 380         (save-excursion
 381           (goto-char (point-min))
 382           (forward-line 1)
 383           (delete-region (point-min) (point))
 384           (if calc-keypad-input
 385               (insert "Calc: " calc-keypad-input "\n")
 386             (insert "----+-----Calc " calc-version "-----+----"
 387                     (int-to-string (1+ calc-keypad-menu))
 388                     "\n")))))
 389   (setq calc-keypad-prev-input calc-keypad-input))
 390
 391 (defun calc-keypad-press ()
 392   (interactive)
 393   (unless (eq major-mode 'calc-keypad-mode)
 394     (error "Must be in *Calc Keypad* buffer for this command"))
 395   (let* ((row (save-excursion
 396                 (beginning-of-line)
 397                 (count-lines (point-min) (point))))
 398          (y (/ row 2))
 399          (x (/ (current-column) (if (>= y 4) 6 5)))
 400          radix frac inv
 401          (hyp (with-current-buffer calc-main-buffer
 402                 (setq radix calc-number-radix
 403                       frac calc-prefer-frac
 404                       inv calc-inverse-flag)
 405                 calc-hyperbolic-flag))
 406          (invhyp t)
 407          (menu (symbol-value (nth calc-keypad-menu calc-keypad-menus)))
 408          (input calc-keypad-input)
 409          (iexpon (and input
 410                       (or (string-match "\\*[0-9]+\\.\\^" input)
 411                           (and (<= radix 14) (string-match "e" input)))
 412                       (match-end 0)))
 413          (key (nth x (nth y calc-keypad-full-layout)))
 414          (cmd (or (nth (if inv (if hyp 4 2) (if hyp 3 99)) key)
 415                   (setq invhyp nil)
 416                   (nth 1 key)))
 417          (isstring (and (consp cmd) (stringp (car cmd))))
 418          (calc-is-keypad-press t))
 419     (if invhyp (calc-wrapper))  ; clear Inv and Hyp flags
 420     (unwind-protect
 421         (cond ((or (null cmd)
 422                    (= (% row 2) 0))
 423                (beep))
 424               ((and (> (minibuffer-depth) 0))
 425                (cond (isstring
 426                       (push (aref (car cmd) 0) unread-command-events))
 427                      ((eq cmd 'calc-pop)
 428                       (push ?\177 unread-command-events))
 429                      ((eq cmd 'calc-enter)
 430                       (push 13 unread-command-events))
 431                      ((eq cmd 'calc-undo)
 432                       (push 7 unread-command-events))
 433                      (t
 434                       (beep))))
 435               ((and input (string-match "STO\\|RCL" input))
 436                (cond ((and isstring (string-match "[0-9]" (car cmd)))
 437                       (setq calc-keypad-input nil)
 438                       (let ((var (intern (concat "var-q" (car cmd)))))
 439                         (cond ((equal input "STO+") (calc-store-plus var))
 440                               ((equal input "STO-") (calc-store-minus var))
 441                               ((equal input "STO*") (calc-store-times var))
 442                               ((equal input "STO/") (calc-store-div var))
 443                               ((equal input "STO^") (calc-store-power var))
 444                               ((equal input "STOn") (calc-store-neg 1 var))
 445                               ((equal input "STO&") (calc-store-inv 1 var))
 446                               ((equal input "STO") (calc-store-into var))
 447                               (t (calc-recall var)))))
 448                      ((memq cmd '(calc-pop calc-undo))
 449                       (setq calc-keypad-input nil))
 450                      ((and (equal input "STO")
 451                            (setq frac (assq cmd '( ( calc-plus . "+" )
 452                                                    ( calc-minus . "-" )
 453                                                    ( calc-times . "*" )
 454                                                    ( calc-divide . "/" )
 455                                                    ( calc-power . "^")
 456                                                    ( calc-change-sign . "n")
 457                                                    ( calc-inv . "&") ))))
 458                       (setq calc-keypad-input (concat input (cdr frac))))
 459                      (t
 460                       (beep))))
 461               (isstring
 462                (setq cmd (car cmd))
 463                (if (or (and (equal cmd ".")
 464                             input
 465                             (string-match "[.:e^]" input))
 466                        (and (equal cmd "e")
 467                             input
 468                             (or (and (<= radix 14) (string-match "e" input))
 469                                 (string-match "\\^\\|[-.:]\\'" input)))
 470                        (and (not (equal cmd "."))
 471                             (let ((case-fold-search nil))
 472                               (string-match cmd "0123456789ABCDEF"
 473                                             (if (string-match
 474                                                  "[e^]" (or input ""))
 475                                                 10 radix)))))
 476                    (beep)
 477                  (setq calc-keypad-input (concat
 478                                           (and (/= radix 10)
 479                                                (or (not input)
 480                                                    (equal input "-"))
 481                                                (format "%d#" radix))
 482                                           (and (or (not input)
 483                                                    (equal input "-"))
 484                                                (or (and (equal cmd "e") "1")
 485                                                    (and (equal cmd ".")
 486                                                         (if frac "1" "0"))))
 487                                           input
 488                                           (if (and (equal cmd ".") frac)
 489                                               ":"
 490                                             (if (and (equal cmd "e")
 491                                                      (or (not input)
 492                                                          (string-match
 493                                                           "#" input))
 494                                                      (> radix 14))
 495                                                 (format "*%d.^" radix)
 496                                               cmd))))))
 497               ((and (eq cmd 'calc-change-sign)
 498                     input)
 499                (let* ((epos (or iexpon 0))
 500                       (suffix (substring input epos)))
 501                  (setq calc-keypad-input (concat
 502                                           (substring input 0 epos)
 503                                           (if (string-match "\\`-" suffix)
 504                                               (substring suffix 1)
 505                                             (concat "-" suffix))))))
 506               ((and (eq cmd 'calc-pop)
 507                     input)
 508                (if (equal input "")
 509                    (beep)
 510                  (setq calc-keypad-input (substring input 0
 511                                                     (or (string-match
 512                                                          "\\*[0-9]+\\.\\^\\'"
 513                                                          input)
 514                                                         -1)))))
 515               ((and (eq cmd 'calc-undo)
 516                     input)
 517                (setq calc-keypad-input nil))
 518               (t
 519                (if input
 520                    (let ((val (math-read-number input)))
 521                      (setq calc-keypad-input nil)
 522                      (if val
 523                          (calc-wrapper
 524                           (calc-push-list (list (calc-record
 525                                                  (calc-normalize val)))))
 526                        (or (equal input "")
 527                            (beep))
 528                        (setq cmd nil))
 529                      (if (eq cmd 'calc-enter) (setq cmd nil))))
 530                (setq prefix-arg current-prefix-arg)
 531                (if cmd
 532                    (if (and (consp cmd) (eq (car cmd) 'progn))
 533                        (while (setq cmd (cdr cmd))
 534                          (if (integerp (car cmd))
 535                              (setq prefix-arg (car cmd))
 536                            (command-execute (car cmd))))
 537                      (command-execute cmd)))))
 538       (set-buffer calc-keypad-buffer)
 539       (calc-keypad-show-input))))
 540
 541 (defun calc-keypad-left-click (event)
 542   "Handle a left-button mouse click in Calc Keypad window."
 543   (interactive "e")
 544   (with-current-buffer calc-keypad-buffer
 545     (goto-char (posn-point (event-start event)))
 546     (calc-keypad-press)))
 547
 548 (defun calc-keypad-right-click (event)
 549   "Handle a right-button mouse click in Calc Keypad window."
 550   (interactive "e")
 551   (save-excursion
 552     (set-buffer calc-keypad-buffer)
 553     (calc-keypad-menu)))
 554
 555 (defun calc-keypad-middle-click (event)
 556   "Handle a middle-button mouse click in Calc Keypad window."
 557   (interactive "e")
 558   (with-current-buffer calc-keypad-buffer
 559     (calc-keypad-menu-back)))
 560
 561 (defun calc-keypad-menu ()
 562   (interactive)
 563   (unless (eq major-mode 'calc-keypad-mode)
 564     (error "Must be in *Calc Keypad* buffer for this command"))
 565   (while (progn (setq calc-keypad-menu (% (1+ calc-keypad-menu)
 566                                           (length calc-keypad-menus)))
 567                 (not (symbol-value (nth calc-keypad-menu calc-keypad-menus)))))
 568   (calc-keypad-redraw))
 569
 570 (defun calc-keypad-menu-back ()
 571   (interactive)
 572   (or (eq major-mode 'calc-keypad-mode)
 573       (error "Must be in *Calc Keypad* buffer for this command"))
 574   (while (progn (setq calc-keypad-menu (% (1- (+ calc-keypad-menu
 575                                                  (length calc-keypad-menus)))
 576                                           (length calc-keypad-menus)))
 577                 (not (symbol-value (nth calc-keypad-menu calc-keypad-menus)))))
 578   (calc-keypad-redraw))
 579
 580 (defun calc-keypad-store ()
 581   (interactive)
 582   (setq calc-keypad-input "STO"))
 583
 584 (defun calc-keypad-recall ()
 585   (interactive)
 586   (setq calc-keypad-input "RCL"))
 587
 588 (defun calc-pack-interval (mode)
 589   (interactive "p")
 590   (if (or (< mode 0) (> mode 3))
 591       (error "Open/close code should be in the range from 0 to 3"))
 592   (calc-pack (- -6 mode)))
 593
 594 (defun calc-keypad-execute ()
 595   (interactive)
 596   (let* ((prompt "Calc keystrokes: ")
 597          (flush 'x-flush-mouse-queue)
 598          (prefix nil)
 599          keys cmd)
 600     (save-excursion
 601       (calc-select-buffer)
 602       (while (progn
 603                (setq keys (read-key-sequence prompt))
 604                (setq cmd (key-binding keys))
 605                (if (or (memq cmd '(calc-inverse
 606                                    calc-hyperbolic
 607                                    universal-argument
 608                                    digit-argument
 609                                    negative-argument))
 610                        (and prefix (string-match "\\`\e?[-0-9]\\'" keys)))
 611                    (progn
 612                      (setq last-command-char (aref keys (1- (length keys))))
 613                      (command-execute cmd)
 614                      (setq flush 'not-any-more
 615                            prefix t
 616                            prompt (concat prompt (key-description keys) " ")))
 617                  (eq cmd flush)))))  ; skip mouse-up event
 618     (message "")
 619     (if (commandp cmd)
 620         (command-execute cmd)
 621       (error "Not a Calc command: %s" (key-description keys)))))
 622
 623 (provide 'calc-keypd)
 624
 625 ;;; arch-tag: 4ba0d360-2bb6-40b8-adfa-eb373765b3f9
 626 ;;; calc-keypd.el ends here