lisp/emulation/viper-mous.el

   1 ;;; viper-mous.el --- mouse support for Viper
   2
   3 ;; Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
   4
   5 ;; This file is part of GNU Emacs.
   6
   7 ;; GNU Emacs is free software; you can redistribute it and/or modify
   8 ;; it under the terms of the GNU General Public License as published by
   9 ;; the Free Software Foundation; either version 2, or (at your option)
  10 ;; any later version.
  11
  12 ;; GNU Emacs is distributed in the hope that it will be useful,
  13 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 ;; GNU General Public License for more details.
  16
  17 ;; You should have received a copy of the GNU General Public License
  18 ;; along with GNU Emacs; see the file COPYING.  If not, write to the
  19 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 ;; Boston, MA 02111-1307, USA.
  21
  22 ;; Code
  23
  24 (provide 'viper-mous)
  25
  26 ;; compiler pacifier
  27 (defvar double-click-time)
  28 (defvar mouse-track-multi-click-time)
  29 (defvar viper-search-start-marker)
  30 (defvar viper-local-search-start-marker)
  31 (defvar viper-search-history)
  32 (defvar viper-s-string)
  33 (defvar viper-re-search)
  34
  35 ;; loading happens only in non-interactive compilation
  36 ;; in order to spare non-viperized emacs from being viperized
  37 (if noninteractive
  38     (eval-when-compile
  39       (let ((load-path (cons (expand-file-name ".") load-path)))
  40         (or (featurep 'viper-util)
  41             (load "viper-util.el" nil nil 'nosuffix))
  42         (or (featurep 'viper-cmd)
  43             (load "viper-cmd.el" nil nil 'nosuffix))
  44         )))
  45 ;; end pacifier
  46
  47 (require 'viper-util)
  48
  49
  50 (defgroup viper-mouse nil
  51   "Support for Viper special mouse-bound commands"
  52   :prefix "viper-"
  53   :group 'viper)
  54
  55 \f
  56 ;;; Variables
  57
  58 ;; Variable used for catching the switch-frame event.
  59 ;; If non-nil, indicates that previous-frame should be the selected
  60 ;; one. Used by viper-mouse-click-get-word. Not a user option.
  61 (defvar viper-frame-of-focus nil)
  62
  63 ;; Frame that was selected before the switch-frame event.
  64 (defconst viper-current-frame-saved (selected-frame))
  65
  66 (defcustom viper-surrounding-word-function 'viper-surrounding-word
  67   "*Function that determines what constitutes a word for clicking events.
  68 Takes two parameters: a COUNT, indicating how many words to return,
  69 and CLICK-COUNT, telling whether this is the first click, a double-click,
  70 or a tripple-click."
  71   :type 'boolean
  72   :group 'viper-mouse)
  73
  74 ;; time interval in millisecond within which successive clicks are
  75 ;; considered related
  76 (defcustom viper-multiclick-timeout (if (viper-window-display-p)
  77                                       (if viper-xemacs-p
  78                                           mouse-track-multi-click-time
  79                                         double-click-time)
  80                                     500)
  81   "*Time interval in millisecond within which successive mouse clicks are
  82 considered related."
  83   :type 'integer
  84   :group 'viper-mouse)
  85
  86 ;; current event click count; XEmacs only
  87 (defvar viper-current-click-count 0)
  88 ;; time stamp of the last click event; XEmacs only
  89 (defvar viper-last-click-event-timestamp 0)
  90
  91 ;; Local variable used to toggle wraparound search on click.
  92 (viper-deflocalvar  viper-mouse-click-search-noerror t)
  93
  94 ;; Local variable used to delimit search after wraparound.
  95 (viper-deflocalvar  viper-mouse-click-search-limit nil)
  96
  97 ;; remembers prefix argument to pass along to commands invoked by second
  98 ;; click.
  99 ;; This is needed because in Emacs (not XEmacs), assigning to preix-arg
 100 ;; causes Emacs to count the second click as if it was a single click
 101 (defvar viper-global-prefix-argument nil)
 102
 103
 104 ;; same keys, but parsed
 105 (defvar viper-mouse-up-search-key-parsed nil)
 106 (defvar viper-mouse-down-search-key-parsed nil)
 107 (defvar viper-mouse-up-insert-key-parsed nil)
 108 (defvar viper-mouse-down-insert-key-parsed nil)
 109
 110
 111
 112 \f
 113 ;;; Code
 114
 115 (defsubst viper-multiclick-p ()
 116   (not (viper-sit-for-short viper-multiclick-timeout t)))
 117
 118 ;; Returns window where click occurs
 119 (defun viper-mouse-click-window (click)
 120   (let ((win (if viper-xemacs-p
 121                 (event-window click)
 122               (posn-window (event-start click)))))
 123     (if (window-live-p win)
 124         win
 125       (error "Click was not over a live window"))))
 126
 127 ;; Returns window where click occurs
 128 (defsubst viper-mouse-click-frame (click)
 129   (window-frame (viper-mouse-click-window click)))
 130
 131 ;; Returns the buffer of the window where click occurs
 132 (defsubst viper-mouse-click-window-buffer (click)
 133   (window-buffer (viper-mouse-click-window click)))
 134
 135 ;; Returns the name of the buffer in the window where click occurs
 136 (defsubst viper-mouse-click-window-buffer-name (click)
 137   (buffer-name (viper-mouse-click-window-buffer click)))
 138
 139 ;; Returns position of a click
 140 (defsubst viper-mouse-click-posn (click)
 141   (if viper-xemacs-p
 142       (event-point click)
 143     (posn-point (event-start click))))
 144
 145
 146 (defun viper-surrounding-word (count click-count)
 147    "Returns word surrounding point according to a heuristic.
 148 COUNT indicates how many regions to return.
 149 If CLICK-COUNT is 1, `word' is a word in Vi sense.
 150 If CLICK-COUNT is 2,then `word' is a Word in Vi sense.
 151 If the character clicked on is a non-separator and is non-alphanumeric but
 152 is adjacent to an alphanumeric symbol, then it is considered alphanumeric
 153 for the purpose of this command. If this character has a matching
 154 character, such as `\(' is a match for `\)', then the matching character is
 155 also considered alphanumeric.
 156 For convenience, in Lisp modes, `-' is considered alphanumeric.
 157
 158 If CLICK-COUNT is 3 or more, returns the line clicked on with leading and
 159 trailing space and tabs removed. In that case, the first argument, COUNT,
 160 is ignored."
 161    (let ((modifiers "")
 162          beg skip-flag result
 163          word-beg)
 164      (if (> click-count 2)
 165          (save-excursion
 166            (beginning-of-line)
 167            (viper-skip-all-separators-forward 'within-line)
 168            (setq beg (point))
 169            (end-of-line)
 170            (setq result (buffer-substring beg (point))))
 171
 172        (if (and (not (viper-looking-at-alphasep))
 173                 (or (save-excursion (viper-backward-char-carefully)
 174                                     (viper-looking-at-alpha))
 175                     (save-excursion (viper-forward-char-carefully)
 176                                     (viper-looking-at-alpha))))
 177            (setq modifiers
 178                  (cond ((looking-at "\\\\") "\\\\")
 179                        ((looking-at "-") "C-C-")
 180                        ((looking-at "[][]") "][")
 181                        ((looking-at "[()]") ")(")
 182                        ((looking-at "[{}]") "{}")
 183                        ((looking-at "[<>]") "<>")
 184                        ((looking-at "[`']") "`'")
 185                        ((looking-at "\\^") "\\^")
 186                        ((viper-looking-at-separator) "")
 187                        (t (char-to-string (following-char))))
 188                  ))
 189
 190        ;; Add `-' to alphanum, if it wasn't added and if we are in Lisp
 191        (or (looking-at "-")
 192            (not (string-match "lisp" (symbol-name major-mode)))
 193            (setq modifiers (concat modifiers "C-C-")))
 194
 195
 196        (save-excursion
 197          (cond ((> click-count 1) (viper-skip-nonseparators 'backward))
 198                ((viper-looking-at-alpha modifiers)
 199                 (viper-skip-alpha-backward modifiers))
 200                ((not (viper-looking-at-alphasep modifiers))
 201                 (viper-skip-nonalphasep-backward))
 202                (t (if (> click-count 1)
 203                       (viper-skip-nonseparators 'backward)
 204                     (viper-skip-alpha-backward modifiers))))
 205
 206          (setq word-beg (point))
 207
 208          (setq skip-flag nil) ; don't move 1 char forw the first time
 209          (while (> count 0)
 210            (if skip-flag (viper-forward-char-carefully 1))
 211            (setq skip-flag t) ; now always move 1 char forward
 212            (if (> click-count 1)
 213                (viper-skip-nonseparators 'forward)
 214              (viper-skip-alpha-forward modifiers))
 215            (setq count (1- count)))
 216
 217          (setq result (buffer-substring word-beg (point))))
 218        ) ; if
 219      ;; XEmacs doesn't have set-text-properties, but there buffer-substring
 220      ;; doesn't return properties together with the string, so it's not needed.
 221      (if viper-emacs-p
 222          (set-text-properties 0 (length result) nil result))
 223      result
 224      ))
 225
 226
 227 (defun viper-mouse-click-get-word (click count click-count)
 228   "Returns word surrounding the position of a mouse click.
 229 Click may be in another window. Current window and buffer isn't changed.
 230 On single or double click, returns the word as determined by
 231 `viper-surrounding-word-function'."
 232
 233   (let ((click-word "")
 234         (click-pos (viper-mouse-click-posn click))
 235         (click-buf (viper-mouse-click-window-buffer click)))
 236     (or (natnump count) (setq count 1))
 237     (or (natnump click-count) (setq click-count 1))
 238
 239     (save-excursion
 240       (save-window-excursion
 241         (if click-pos
 242             (progn
 243               (set-buffer click-buf)
 244
 245               (goto-char click-pos)
 246               (setq click-word
 247                     (funcall viper-surrounding-word-function count click-count)))
 248           (error "Click must be over a window."))
 249         click-word))))
 250
 251
 252 (defun viper-mouse-click-insert-word (click arg)
 253   "Insert word clicked or double-clicked on.
 254 With prefix argument, N, insert that many words.
 255 This command must be bound to a mouse click.
 256 The double-click action of the same mouse button must not be bound
 257 \(or it must be bound to the same function\).
 258 See `viper-surrounding-word' for the definition of a word in this case."
 259   (interactive "e\nP")
 260   (if viper-frame-of-focus      ;; to handle clicks in another frame
 261       (select-frame viper-frame-of-focus))
 262   (if (or (not (eq (key-binding viper-mouse-down-insert-key-parsed)
 263                    'viper-mouse-catch-frame-switch))
 264           (not (eq (key-binding viper-mouse-up-insert-key-parsed)
 265                    'viper-mouse-click-insert-word))
 266           (and viper-xemacs-p (not (event-over-text-area-p click))))
 267       () ; do nothing, if binding isn't right or not over text
 268     ;; turn arg into a number
 269     (cond ((integerp arg) nil)
 270           ;; prefix arg is a list when one hits C-u then command
 271           ((and (listp arg) (integerp (car arg)))
 272            (setq arg (car arg)))
 273           (t (setq arg 1)))
 274
 275     (if (not (eq (key-binding viper-mouse-down-insert-key-parsed)
 276                  'viper-mouse-catch-frame-switch))
 277         () ; do nothing
 278       (let (click-count interrupting-event)
 279         (if (and
 280              (viper-multiclick-p)
 281              ;; This trick checks if there is a pending mouse event if so, we
 282              ;; use this latter event and discard the current mouse click If
 283              ;; the next pending event is not a mouse event, we execute the
 284              ;; current mouse event
 285              (progn
 286                (setq interrupting-event (viper-read-event))
 287                (viper-mouse-event-p last-input-event)))
 288             (progn ; interrupted wait
 289               (setq viper-global-prefix-argument arg)
 290               ;; count this click for XEmacs
 291               (viper-event-click-count click))
 292           ;; uninterrupted wait or the interrupting event wasn't a mouse event
 293           (setq click-count (viper-event-click-count click))
 294           (if (> click-count 1)
 295               (setq arg viper-global-prefix-argument
 296                     viper-global-prefix-argument nil))
 297           (insert (viper-mouse-click-get-word click arg click-count))
 298           (if (and interrupting-event
 299                    (eventp interrupting-event)
 300                    (not (viper-mouse-event-p interrupting-event)))
 301               (viper-set-unread-command-events interrupting-event))
 302           )))))
 303
 304 ;; arg is an event. accepts symbols and numbers, too
 305 (defun viper-mouse-event-p (event)
 306   (if (eventp event)
 307       (string-match "\\(mouse-\\|frame\\|screen\\|track\\)"
 308                     (prin1-to-string (viper-event-key event)))))
 309
 310 ;; XEmacs has no double-click events. So, we must simulate.
 311 ;; So, we have to simulate event-click-count.
 312 (defun viper-event-click-count (click)
 313   (if viper-xemacs-p
 314       (progn
 315         ;; if more than 1 second
 316         (if (> (- (event-timestamp click) viper-last-click-event-timestamp)
 317                viper-multiclick-timeout)
 318             (setq viper-current-click-count 0))
 319         (setq viper-last-click-event-timestamp (event-timestamp click)
 320               viper-current-click-count (1+ viper-current-click-count)))
 321     (event-click-count click)))
 322
 323
 324
 325 (defun viper-mouse-click-search-word (click arg)
 326    "Find the word clicked or double-clicked on. Word may be in another window.
 327 With prefix argument, N, search for N-th occurrence.
 328 This command must be bound to a mouse click. The double-click action of the
 329 same button must not be bound \(or it must be bound to the same function\).
 330 See `viper-surrounding-word' for the details on what constitutes a word for
 331 this command."
 332   (interactive "e\nP")
 333   (if viper-frame-of-focus      ;; to handle clicks in another frame
 334       (select-frame viper-frame-of-focus))
 335   (if (or (not (eq (key-binding viper-mouse-down-search-key-parsed)
 336                    'viper-mouse-catch-frame-switch))
 337           (not (eq (key-binding viper-mouse-up-search-key-parsed)
 338                    'viper-mouse-click-search-word))
 339           (and viper-xemacs-p (not (event-over-text-area-p click))))
 340       () ; do nothing, if binding isn't right or not over text
 341     (let ((previous-search-string viper-s-string)
 342           click-word click-count)
 343
 344       (if (and
 345            (viper-multiclick-p)
 346            ;; This trick checks if there is a pending mouse event if so, we use
 347            ;; this latter event and discard the current mouse click If the next
 348            ;; pending event is not a mouse event, we execute the current mouse
 349            ;; event
 350            (progn
 351              (viper-read-event)
 352              (viper-mouse-event-p last-input-event)))
 353           (progn ; interrupted wait
 354             (setq viper-global-prefix-argument
 355                   (or viper-global-prefix-argument arg))
 356             ;; remember command that was before the multiclick
 357             (setq this-command last-command)
 358             ;; make sure we counted this event---needed for XEmacs only
 359             (viper-event-click-count click))
 360         ;; uninterrupted wait
 361         (setq click-count (viper-event-click-count click))
 362         (setq click-word (viper-mouse-click-get-word click nil click-count))
 363
 364         (if (> click-count 1)
 365             (setq arg viper-global-prefix-argument
 366                   viper-global-prefix-argument nil))
 367         (setq arg (or arg 1))
 368
 369         (viper-deactivate-mark)
 370         (if (or (not (string= click-word viper-s-string))
 371                 (not (markerp viper-search-start-marker))
 372                 (not (equal (marker-buffer viper-search-start-marker)
 373                             (current-buffer)))
 374                 (not (eq last-command 'viper-mouse-click-search-word)))
 375             (progn
 376               (setq  viper-search-start-marker (point-marker)
 377                      viper-local-search-start-marker viper-search-start-marker
 378                      viper-mouse-click-search-noerror t
 379                      viper-mouse-click-search-limit nil)
 380
 381               ;; make search string known to Viper
 382               (setq viper-s-string (if viper-re-search
 383                                        (regexp-quote click-word)
 384                                    click-word))
 385               (if (not (string= viper-s-string (car viper-search-history)))
 386                   (setq viper-search-history
 387                         (cons viper-s-string viper-search-history)))
 388               ))
 389
 390         (push-mark nil t)
 391         (while (> arg 0)
 392           (viper-forward-word 1)
 393           (condition-case nil
 394               (progn
 395                 (if (not (search-forward
 396                           click-word viper-mouse-click-search-limit
 397                           viper-mouse-click-search-noerror))
 398                     (progn
 399                       (setq viper-mouse-click-search-noerror nil)
 400                       (setq viper-mouse-click-search-limit
 401                             (save-excursion
 402                               (if (and
 403                                    (markerp viper-local-search-start-marker)
 404                                    (marker-buffer viper-local-search-start-marker))
 405                                   (goto-char viper-local-search-start-marker))
 406                               (viper-line-pos 'end)))
 407
 408                       (goto-char (point-min))
 409                       (search-forward click-word
 410                                       viper-mouse-click-search-limit nil)))
 411                 (goto-char (match-beginning 0))
 412                 (message "Searching for: %s" viper-s-string)
 413                 (if (<= arg 1) ; found the right occurrence of the pattern
 414                     (progn
 415                       (viper-adjust-window)
 416                       (viper-flash-search-pattern)))
 417                 )
 418             (error (beep 1)
 419                    (if (or (not (string= click-word previous-search-string))
 420                            (not (eq  last-command 'viper-mouse-click-search-word)))
 421                        (message "`%s': String not found in %s"
 422                                 viper-s-string (buffer-name (current-buffer)))
 423                      (message
 424                       "`%s': Last occurrence in %s. Back to beginning of search"
 425                       click-word (buffer-name (current-buffer)))
 426                      (setq arg 1) ;; to terminate the loop
 427                      (sit-for 2))
 428                    (setq  viper-mouse-click-search-noerror t)
 429                    (setq  viper-mouse-click-search-limit nil)
 430                    (if (and (markerp viper-local-search-start-marker)
 431                             (marker-buffer viper-local-search-start-marker))
 432                        (goto-char viper-local-search-start-marker))))
 433           (setq arg (1- arg)))
 434         ))))
 435
 436 (defun viper-mouse-catch-frame-switch (event arg)
 437   "Catch the event of switching frame.
 438 Usually is bound to a `down-mouse' event to work properly. See sample
 439 bindings in the Viper manual."
 440   (interactive "e\nP")
 441   (setq viper-frame-of-focus nil)
 442   ;; pass prefix arg along to viper-mouse-click-search/insert-word
 443   (setq prefix-arg arg)
 444   (if (eq last-command 'handle-switch-frame)
 445       (setq viper-frame-of-focus viper-current-frame-saved))
 446   ;; make Emacs forget that it executed viper-mouse-catch-frame-switch
 447   (setq this-command last-command))
 448
 449 ;; Called just before switching frames. Saves the old selected frame.
 450 ;; Sets last-command to handle-switch-frame (this is done automatically in
 451 ;; Emacs.
 452 ;; The semantics of switching frames is different in Emacs and XEmacs.
 453 ;; In Emacs, if you select-frame A while mouse is over frame B and then
 454 ;; start typing, input goes to frame B, which becomes selected.
 455 ;; In XEmacs, input will go to frame A. This may be a bug in one of the
 456 ;; Emacsen, but also may be a design decision.
 457 ;; Also, in Emacs sending input to frame B generates handle-switch-frame
 458 ;; event, while in XEmacs it doesn't.
 459 ;; All this accounts for the difference in the behavior of
 460 ;; viper-mouse-click-* commands when you click in a frame other than the one
 461 ;; that was the last to receive input. In Emacs, focus will be in frame A
 462 ;; until you do something other than viper-mouse-click-* command.
 463 ;; In XEmacs, you have to manually select frame B (with the mouse click) in
 464 ;; order to shift focus to frame B.
 465 (defsubst viper-remember-current-frame (frame)
 466   (setq last-command 'handle-switch-frame
 467         viper-current-frame-saved (selected-frame)))
 468
 469
 470 ;; The key is of the form (MODIFIER ... BUTTON-NUMBER)
 471 ;; Converts into a valid mouse button spec for the appropriate version of
 472 ;; Emacs. EVENT-TYPE is either `up' or `down'. Up returns button-up key; down
 473 ;; returns button-down key.
 474 (defun viper-parse-mouse-key (key-var event-type)
 475   (let ((key (eval key-var))
 476         button-spec meta-spec shift-spec control-spec key-spec)
 477     (if (null key)
 478         ;; just return nil
 479         ()
 480       (setq button-spec
 481             (cond ((memq 1 key)
 482                    (if viper-emacs-p
 483                        (if (eq 'up event-type)
 484                            "mouse-1" "down-mouse-1")
 485                      (if (eq 'up event-type)
 486                          'button1up 'button1)))
 487                   ((memq 2 key)
 488                    (if viper-emacs-p
 489                        (if (eq 'up event-type)
 490                            "mouse-2" "down-mouse-2")
 491                      (if (eq 'up event-type)
 492                          'button2up 'button2)))
 493                   ((memq 3 key)
 494                    (if viper-emacs-p
 495                        (if (eq 'up event-type)
 496                            "mouse-3" "down-mouse-3")
 497                      (if (eq 'up event-type)
 498                          'button3up 'button3)))
 499                   (t (error
 500                       "%S: invalid button number, %S" key-var key)))
 501             meta-spec
 502             (if (memq 'meta key)
 503                 (if viper-emacs-p "M-" 'meta)
 504               (if viper-emacs-p "" nil))
 505             shift-spec
 506             (if (memq 'shift key)
 507                 (if viper-emacs-p "S-" 'shift)
 508               (if viper-emacs-p "" nil))
 509             control-spec
 510             (if (memq 'control key)
 511                 (if viper-emacs-p "C-" 'control)
 512               (if viper-emacs-p "" nil)))
 513
 514       (setq key-spec (if viper-emacs-p
 515                          (vector
 516                           (intern
 517                            (concat
 518                             control-spec meta-spec shift-spec button-spec)))
 519                        (vector
 520                         (delq
 521                          nil
 522                          (list
 523                           control-spec meta-spec shift-spec button-spec)))))
 524       )))
 525
 526 (defun viper-unbind-mouse-search-key ()
 527   (if viper-mouse-up-search-key-parsed
 528       (global-unset-key viper-mouse-up-search-key-parsed))
 529   (if viper-mouse-down-search-key-parsed
 530       (global-unset-key viper-mouse-down-search-key-parsed))
 531   (setq viper-mouse-up-search-key-parsed nil
 532         viper-mouse-down-search-key-parsed nil))
 533
 534 (defun viper-unbind-mouse-insert-key ()
 535   (if viper-mouse-up-insert-key-parsed
 536       (global-unset-key viper-mouse-up-insert-key-parsed))
 537   (if viper-mouse-down-insert-key-parsed
 538       (global-unset-key viper-mouse-down-insert-key-parsed))
 539   (setq viper-mouse-up-insert-key-parsed nil
 540         viper-mouse-down-insert-key-parsed nil))
 541
 542 ;; If FORCE, bind even if this mouse action is already bound to something else
 543 (defun viper-bind-mouse-search-key (&optional force)
 544   (setq viper-mouse-up-search-key-parsed
 545         (viper-parse-mouse-key 'viper-mouse-search-key 'up)
 546         viper-mouse-down-search-key-parsed
 547         (viper-parse-mouse-key 'viper-mouse-search-key 'down))
 548   (cond ((or (null viper-mouse-up-search-key-parsed)
 549              (null viper-mouse-down-search-key-parsed))
 550          nil) ; just quit
 551         ((and (null force)
 552               (key-binding viper-mouse-up-search-key-parsed)
 553               (not (eq (key-binding viper-mouse-up-search-key-parsed)
 554                        'viper-mouse-click-search-word)))
 555          (message
 556           "%S already bound to a mouse event. Viper mouse-search feature disabled"
 557           viper-mouse-up-search-key-parsed))
 558         ((and (null force)
 559               (key-binding viper-mouse-down-search-key-parsed)
 560               (not (eq (key-binding viper-mouse-down-search-key-parsed)
 561                        'viper-mouse-catch-frame-switch)))
 562          (message
 563           "%S already bound to a mouse event. Viper mouse-search feature disabled"
 564           viper-mouse-down-search-key-parsed))
 565         (t
 566          (global-set-key viper-mouse-up-search-key-parsed
 567                          'viper-mouse-click-search-word)
 568          (global-set-key viper-mouse-down-search-key-parsed
 569                          'viper-mouse-catch-frame-switch))))
 570
 571 ;; If FORCE, bind even if this mouse action is already bound to something else
 572 (defun viper-bind-mouse-insert-key (&optional force)
 573   (setq viper-mouse-up-insert-key-parsed
 574         (viper-parse-mouse-key 'viper-mouse-insert-key 'up)
 575         viper-mouse-down-insert-key-parsed
 576         (viper-parse-mouse-key 'viper-mouse-insert-key 'down))
 577   (cond ((or (null viper-mouse-up-insert-key-parsed)
 578              (null viper-mouse-down-insert-key-parsed))
 579          nil) ; just quit
 580         ((and (null force)
 581               (key-binding viper-mouse-up-insert-key-parsed)
 582               (not (eq (key-binding viper-mouse-up-insert-key-parsed)
 583                        'viper-mouse-click-insert-word)))
 584          (message
 585           "%S already bound to a mouse event. Viper mouse-insert feature disabled"
 586           viper-mouse-up-insert-key-parsed))
 587         ((and (null force)
 588               (key-binding viper-mouse-down-insert-key-parsed)
 589               (not (eq (key-binding viper-mouse-down-insert-key-parsed)
 590                        'viper-mouse-catch-frame-switch)))
 591          (message
 592           "%S already bound to a mouse event. Viper mouse-insert feature disabled"
 593           viper-mouse-down-insert-key-parsed))
 594         (t
 595          (global-set-key viper-mouse-up-insert-key-parsed
 596                          'viper-mouse-click-insert-word)
 597          (global-set-key viper-mouse-down-insert-key-parsed
 598                          'viper-mouse-catch-frame-switch))))
 599
 600 (defun viper-reset-mouse-search-key (symb val)
 601   (viper-unbind-mouse-search-key)
 602   (set symb val)
 603   (viper-bind-mouse-search-key 'force))
 604
 605 (defun viper-reset-mouse-insert-key (symb val)
 606   (viper-unbind-mouse-insert-key)
 607   (set symb val)
 608   (viper-bind-mouse-insert-key 'force))
 609
 610
 611 (defcustom viper-mouse-search-key '(meta shift 1)
 612   "*Key used to click-search in Viper.
 613 This must be a list that specifies the mouse button and modifiers.
 614 The supported modifiers are `meta', `shift', and `control'.
 615 For instance, `(meta shift 1)' means that holding the meta and shift
 616 keys down and clicking on a word with mouse button 1
 617 will search for that word in the buffer that was current before the click.
 618 This buffer may be different from the one where the click occurred."
 619   :type '(list (set :inline t :tag "Modifiers" :format "%t: %v"
 620                      (const :format "%v " meta)
 621                      (const :format "%v " shift)
 622                      (const control))
 623                (integer :tag "Button"))
 624   :set 'viper-reset-mouse-search-key
 625   :group 'viper-mouse)
 626
 627 (defcustom viper-mouse-insert-key '(meta shift 2)
 628   "*Key used to click-insert in Viper.
 629 Must be a list that specifies the mouse button and modifiers.
 630 The supported modifiers are `meta', `shift', and `control'.
 631 For instance, `(meta shift 2)' means that holding the meta and shift keys
 632 down, and clicking on a word with mouse button 2, will insert that word
 633 at the cursor in the buffer that was current just before the click.
 634 This buffer may be different from the one where the click occurred."
 635   :type '(list (set :inline t :tag "Modifiers" :format "%t: %v"
 636                      (const :format "%v " meta)
 637                      (const :format "%v " shift)
 638                      (const control))
 639                (integer :tag "Button"))
 640   :set 'viper-reset-mouse-insert-key
 641   :group 'viper-mouse)
 642
 643
 644
 645 ;;; Local Variables:
 646 ;;; eval: (put 'viper-deflocalvar 'lisp-indent-hook 'defun)
 647 ;;; End:
 648
 649
 650 ;;;  viper-mous.el ends here