lisp/mouse.el

   1 ;;; mouse.el --- window system-independent mouse support.
   2
   3 ;;; Copyright (C) 1993 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: hardware
   7
   8 ;;; This file is part of GNU Emacs.
   9
  10 ;;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;;; it under the terms of the GNU General Public License as published by
  12 ;;; the Free Software Foundation; either version 2, or (at your option)
  13 ;;; any later version.
  14
  15 ;;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;;; GNU General Public License for more details.
  19
  20 ;;; You should have received a copy of the GNU General Public License
  21 ;;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Commentary:
  25
  26 ;; This package provides various useful commands (including help
  27 ;; system access) through the mouse.  All this code assumes that mouse
  28 ;; interpretation has been abstracted into Emacs input events.
  29 ;;
  30 ;; The code is rather X-dependent.
  31
  32 ;;; Code:
  33
  34 ;;; Utility functions.
  35
  36 ;;; Indent track-mouse like progn.
  37 (put 'track-mouse 'lisp-indent-function 0)
  38
  39 (defvar mouse-yank-at-point nil
  40   "*If non-nil, mouse yank commands yank at point instead of at click.")
  41 \f
  42 (defun mouse-minibuffer-check (event)
  43   (let ((w (posn-window (event-start event))))
  44     (and (window-minibuffer-p w)
  45          (not (minibuffer-window-active-p w))
  46          (error "Minibuffer window is not active"))))
  47
  48 (defun mouse-delete-window (click)
  49   "Delete the window you click on.
  50 This must be bound to a mouse click."
  51   (interactive "e")
  52   (mouse-minibuffer-check click)
  53   (delete-window (posn-window (event-start click))))
  54
  55 (defun mouse-select-window (click)
  56   "Select the window clicked on; don't move point."
  57   (interactive "e")
  58   (mouse-minibuffer-check click)
  59   (let ((oframe (selected-frame))
  60         (frame (window-frame (posn-window (event-start click)))))
  61     (select-window (posn-window (event-start click)))
  62     (raise-frame frame)
  63     (select-frame frame)
  64     (or (eq frame oframe)
  65         (set-mouse-position (selected-frame) (1- (frame-width)) 0))
  66     (unfocus-frame)))
  67
  68 (defun mouse-tear-off-window (click)
  69   "Delete the window clicked on, and create a new frame displaying its buffer."
  70   (interactive "e")
  71   (mouse-minibuffer-check click)
  72   (let* ((window (posn-window (event-start click)))
  73          (buf (window-buffer window))
  74          (frame (new-frame)))
  75     (select-frame frame)
  76     (switch-to-buffer buf)
  77     (delete-window window)))
  78
  79 (defun mouse-delete-other-windows ()
  80   "Delete all window except the one you click on."
  81   (interactive "@")
  82   (delete-other-windows))
  83
  84 (defun mouse-split-window-vertically (click)
  85   "Select Emacs window mouse is on, then split it vertically in half.
  86 The window is split at the line clicked on.
  87 This command must be bound to a mouse click."
  88   (interactive "@e")
  89   (mouse-minibuffer-check click)
  90   (let ((start (event-start click)))
  91     (select-window (posn-window start))
  92     (let ((new-height (if (eq (posn-point start) 'vertical-scroll-bar)
  93                           (scroll-bar-scale (posn-col-row start)
  94                                             (1- (window-height)))
  95                         (1+ (cdr (posn-col-row (event-end click))))))
  96           (first-line window-min-height)
  97           (last-line (- (window-height) window-min-height)))
  98       (if (< last-line first-line)
  99           (error "window too short to split")
 100         (split-window-vertically
 101          (min (max new-height first-line) last-line))))))
 102
 103 (defun mouse-split-window-horizontally (click)
 104   "Select Emacs window mouse is on, then split it horizontally in half.
 105 The window is split at the column clicked on.
 106 This command must be bound to a mouse click."
 107   (interactive "@e")
 108   (mouse-minibuffer-check click)
 109   (let ((start (event-start click)))
 110     (select-window (posn-window start))
 111     (let ((new-width (1+ (car (posn-col-row (event-end click)))))
 112           (first-col window-min-width)
 113           (last-col (- (window-width) window-min-width)))
 114       (if (< last-col first-col)
 115           (error "window too narrow to split")
 116         (split-window-horizontally
 117          (min (max new-width first-col) last-col))))))
 118
 119 (defun mouse-set-point (event)
 120   "Move point to the position clicked on with the mouse.
 121 This should be bound to a mouse click event type."
 122   (interactive "e")
 123   (mouse-minibuffer-check event)
 124   ;; Use event-end in case called from mouse-drag-region.
 125   ;; If EVENT is a click, event-end and event-start give same value.
 126   (let ((posn (event-end event)))
 127     (select-window (posn-window posn))
 128     (if (numberp (posn-point posn))
 129         (goto-char (posn-point posn)))))
 130
 131 (defun mouse-set-region (click)
 132   "Set the region to the text dragged over, and copy to kill ring.
 133 This should be bound to a mouse drag event."
 134   (interactive "e")
 135   (mouse-minibuffer-check click)
 136   (let ((posn (event-start click))
 137         (end (event-end click)))
 138     (select-window (posn-window posn))
 139     (if (numberp (posn-point posn))
 140         (goto-char (posn-point posn)))
 141     ;; If mark is highlighted, no need to bounce the cursor.
 142     (or (and transient-mark-mode
 143              (eq (framep (selected-frame)) 'x))
 144         (sit-for 1))
 145     (push-mark)
 146     (set-mark (point))
 147     (if (numberp (posn-point end))
 148         (goto-char (posn-point end)))
 149     ;; Don't set this-command to kill-region, so that a following
 150     ;; C-w will not double the text in the kill ring.
 151     (let (this-command)
 152       (copy-region-as-kill (mark) (point)))))
 153
 154 (defvar mouse-scroll-delay 0.25
 155   "*The pause between scroll steps caused by mouse drags, in seconds.
 156 If you drag the mouse beyond the edge of a window, Emacs scrolls the
 157 window to bring the text beyond that edge into view, with a delay of
 158 this many seconds between scroll steps.  Scrolling stops when you move
 159 the mouse back into the window, or release the button.
 160 This variable's value may be non-integral.
 161 Setting this to zero causes Emacs to scroll as fast as it can.")
 162
 163 (defun mouse-scroll-subr (jump &optional overlay start)
 164   "Scroll the selected window JUMP lines at a time, until new input arrives.
 165 If OVERLAY is an overlay, let it stretch from START to the far edge of
 166 the newly visible text.
 167 Upon exit, point is at the far edge of the newly visible text."
 168   (while (progn
 169            (goto-char (window-start))
 170            (if (not (zerop (vertical-motion jump)))
 171                (progn
 172                  (set-window-start (selected-window) (point))
 173                  (if (natnump jump)
 174                      (progn
 175                        (goto-char (window-end (selected-window)))
 176                        ;; window-end doesn't reflect the window's new
 177                        ;; start position until the next redisplay.  Hurrah.
 178                        (vertical-motion (1- jump)))
 179                    (goto-char (window-start (selected-window))))
 180                  (if overlay
 181                      (move-overlay overlay start (point)))
 182                  (if (not (eobp))
 183                      (sit-for mouse-scroll-delay))))))
 184   (point))
 185
 186 (defvar mouse-drag-overlay (make-overlay 1 1))
 187 (overlay-put mouse-drag-overlay 'face 'region)
 188
 189 (defvar mouse-selection-click-count 0)
 190
 191 (defun mouse-drag-region (start-event)
 192   "Set the region to the text that the mouse is dragged over.
 193 Highlight the drag area as you move the mouse.
 194 This must be bound to a button-down mouse event.
 195 In Transient Mark mode, the highlighting remains once you
 196 release the mouse button.  Otherwise, it does not."
 197   (interactive "e")
 198   (mouse-minibuffer-check start-event)
 199   (let* ((start-posn (event-start start-event))
 200          (start-point (posn-point start-posn))
 201          (start-window (posn-window start-posn))
 202          (start-frame (window-frame start-window))
 203          (bounds (window-edges start-window))
 204          (top (nth 1 bounds))
 205          (bottom (if (window-minibuffer-p start-window)
 206                      (nth 3 bounds)
 207                    ;; Don't count the mode line.
 208                    (1- (nth 3 bounds))))
 209          (click-count (1- (event-click-count start-event))))
 210     (setq mouse-selection-click-count click-count)
 211     (mouse-set-point start-event)
 212     (let ((range (mouse-start-end start-point start-point click-count)))
 213       (move-overlay mouse-drag-overlay (car range) (nth 1 range)
 214                     (window-buffer start-window)))
 215     (deactivate-mark)
 216     (let (event end end-point)
 217       (track-mouse
 218         (while (progn
 219                  (setq event (read-event))
 220                  (or (mouse-movement-p event)
 221                      (eq (car-safe event) 'switch-frame)))
 222           (if (eq (car-safe event) 'switch-frame)
 223               nil
 224             (setq end (event-end event)
 225                   end-point (posn-point end))
 226
 227             (cond
 228
 229              ;; Ignore switch-frame events.
 230              ((eq (car-safe event) 'switch-frame))
 231
 232              ;; Are we moving within the original window?
 233              ((and (eq (posn-window end) start-window)
 234                    (integer-or-marker-p end-point))
 235               (goto-char end-point)
 236               (let ((range (mouse-start-end start-point (point) click-count)))
 237                 (move-overlay mouse-drag-overlay (car range) (nth 1 range))))
 238
 239              (t
 240               (let ((mouse-row (cdr (cdr (mouse-position)))))
 241                 (cond
 242                  ((null mouse-row))
 243                  ((< mouse-row top)
 244                   (mouse-scroll-subr
 245                    (- mouse-row top) mouse-drag-overlay start-point))
 246                  ((and (not (eobp))
 247                        (>= mouse-row bottom))
 248                   (mouse-scroll-subr (1+ (- mouse-row bottom))
 249                                      mouse-drag-overlay start-point)))))))))
 250
 251       (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 252                (eq (posn-window (event-end event)) start-window)
 253                (numberp (posn-point (event-end event))))
 254           (let ((fun (key-binding (vector (car event)))))
 255             (if (memq fun '(mouse-set-region mouse-set-point))
 256                 (if (not (= (overlay-start mouse-drag-overlay)
 257                             (overlay-end mouse-drag-overlay)))
 258                     (let (this-command)
 259                       (push-mark (overlay-start mouse-drag-overlay) t t)
 260                       (goto-char (overlay-end mouse-drag-overlay))
 261                       (copy-region-as-kill (point) (mark t)))
 262                   (goto-char (overlay-end mouse-drag-overlay))
 263                   (setq this-command 'mouse-set-point))
 264               (if (fboundp fun)
 265                   (funcall fun event)))))
 266       (delete-overlay mouse-drag-overlay))))
 267 \f
 268 ;; Commands to handle xterm-style multiple clicks.
 269
 270 (defun mouse-skip-word (dir)
 271   "Skip over word, over whitespace, or over identical punctuation.
 272 If DIR is positive skip forward; if negative, skip backward."
 273   (let* ((char (following-char))
 274          (syntax (char-to-string (char-syntax char))))
 275     (if (or (string= syntax "w") (string= syntax " "))
 276         (if (< dir 0)
 277             (skip-syntax-backward syntax)
 278           (skip-syntax-forward syntax))
 279       (if (< dir 0)
 280           (while (and (not (bobp)) (= (preceding-char) char))
 281             (forward-char -1))
 282         (while (and (not (eobp)) (= (following-char) char))
 283           (forward-char 1))))))
 284
 285 ;; Return a list of region bounds based on START and END according to MODE.
 286 ;; If MODE is 0 then set point to (min START END), mark to (max START END).
 287 ;; If MODE is 1 then set point to start of word at (min START END),
 288 ;; mark to end of word at (max START END).
 289 ;; If MODE is 2 then do the same for lines.
 290 (defun mouse-start-end (start end mode)
 291   (if (> start end)
 292       (let ((temp start))
 293         (setq start end
 294               end temp)))
 295   (setq mode (mod mode 3))
 296   (cond ((= mode 0)
 297          (list start end))
 298         ((and (= mode 1)
 299               (= start end)
 300               (char-after start)
 301               (= (char-syntax (char-after start)) ?\())
 302          (list start
 303                (save-excursion
 304                  (goto-char start)
 305                  (forward-sexp 1)
 306                  (point))))
 307         ((and (= mode 1)
 308               (= start end)
 309               (char-after start)
 310               (= (char-syntax (char-after start)) ?\)))
 311          (list (save-excursion
 312                  (goto-char (1+ start))
 313                  (backward-sexp 1)
 314                  (point))
 315                (1+ start)))
 316         ((= mode 1)
 317          (list (save-excursion
 318                  (goto-char start)
 319                  (mouse-skip-word -1)
 320                  (point))
 321                (save-excursion
 322                  (goto-char end)
 323                  (mouse-skip-word 1)
 324                  (point))))
 325         ((= mode 2)
 326          (list (save-excursion
 327                  (goto-char start)
 328                  (beginning-of-line 1)
 329                  (point))
 330                (save-excursion
 331                  (goto-char end)
 332                  (forward-line 1)
 333                  (point))))))
 334 \f
 335 ;; Subroutine: set the mark where CLICK happened,
 336 ;; but don't do anything else.
 337 (defun mouse-set-mark-fast (click)
 338   (mouse-minibuffer-check click)
 339   (let ((posn (event-start click)))
 340     (select-window (posn-window posn))
 341     (if (numberp (posn-point posn))
 342         (push-mark (posn-point posn) t t))))
 343
 344 ;; Momentarily show where the mark is, if highlighting doesn't show it.
 345 (defun mouse-show-mark ()
 346   (or transient-mark-mode
 347       (save-excursion
 348         (goto-char (mark t))
 349         (sit-for 1))))
 350
 351 (defun mouse-set-mark (click)
 352   "Set mark at the position clicked on with the mouse.
 353 Display cursor at that position for a second.
 354 This must be bound to a mouse click."
 355   (interactive "e")
 356   (let ((point-save (point)))
 357     (unwind-protect
 358         (progn (mouse-set-point click)
 359                (push-mark nil t t)
 360                (or transient-mark-mode
 361                    (sit-for 1)))
 362       (goto-char point-save))))
 363
 364 (defun mouse-kill (click)
 365   "Kill the region between point and the mouse click.
 366 The text is saved in the kill ring, as with \\[kill-region]."
 367   (interactive "e")
 368   (mouse-minibuffer-check click)
 369   (let* ((posn (event-start click))
 370          (click-posn (posn-point posn)))
 371     (select-window (posn-window posn))
 372     (if (numberp click-posn)
 373         (kill-region (min (point) click-posn)
 374                      (max (point) click-posn)))))
 375
 376 (defun mouse-yank-at-click (click arg)
 377   "Insert the last stretch of killed text at the position clicked on.
 378 Also move point to one end of the text thus inserted (normally the end).
 379 Prefix arguments are interpreted as with \\[yank].
 380 If `mouse-yank-at-point' is non-nil, insert at point
 381 regardless of where you click."
 382   (interactive "e\nP")
 383   (or mouse-yank-at-point (mouse-set-point click))
 384   (setq this-command 'yank)
 385   (yank arg))
 386
 387 (defun mouse-kill-ring-save (click)
 388   "Copy the region between point and the mouse click in the kill ring.
 389 This does not delete the region; it acts like \\[kill-ring-save]."
 390   (interactive "e")
 391   (mouse-set-mark-fast click)
 392   (kill-ring-save (point) (mark t))
 393   (mouse-show-mark))
 394
 395 ;;; This function used to delete the text between point and the mouse
 396 ;;; whenever it was equal to the front of the kill ring, but some
 397 ;;; people found that confusing.
 398
 399 ;;; A list (TEXT START END), describing the text and position of the last
 400 ;;; invocation of mouse-save-then-kill.
 401 (defvar mouse-save-then-kill-posn nil)
 402
 403 (defun mouse-save-then-kill-delete-region (beg end)
 404   ;; We must make our own undo boundaries
 405   ;; because they happen automatically only for the current buffer.
 406   (undo-boundary)
 407   (if (or (= beg end) (eq buffer-undo-list t))
 408       ;; If we have no undo list in this buffer,
 409       ;; just delete.
 410       (delete-region beg end)
 411     ;; Delete, but make the undo-list entry share with the kill ring.
 412     ;; First, delete just one char, so in case buffer is being modified
 413     ;; for the first time, the undo list records that fact.
 414     (delete-region beg
 415                    (+ beg (if (> end beg) 1 -1)))
 416     (let ((buffer-undo-list buffer-undo-list))
 417       ;; Undo that deletion--but don't change the undo list!
 418       (primitive-undo 1 buffer-undo-list)
 419       ;; Now delete the rest of the specified region,
 420       ;; but don't record it.
 421       (setq buffer-undo-list t)
 422       (if (/= (length (car kill-ring)) (- (max end beg) (min end beg)))
 423           (error "Lossage in mouse-save-then-kill-delete-region"))
 424       (delete-region beg end))
 425     (let ((tail buffer-undo-list))
 426       ;; Search back in buffer-undo-list for the string
 427       ;; that came from deleting one character.
 428       (while (and tail (not (stringp (car (car tail)))))
 429         (setq tail (cdr tail)))
 430       ;; Replace it with an entry for the entire deleted text.
 431       (and tail
 432            (setcar tail (cons (car kill-ring) (min beg end))))))
 433   (undo-boundary))
 434
 435 (defun mouse-save-then-kill (click)
 436   "Save text to point in kill ring; the second time, kill the text.
 437 If the text between point and the mouse is the same as what's
 438 at the front of the kill ring, this deletes the text.
 439 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 440 which prepares for a second click to delete the text.
 441
 442 If you have selected words or lines, this command extends the
 443 selection through the word or line clicked on.  If you do this
 444 again in a different position, it extends the selection again.
 445 If you do this twice in the same position, the selection is killed."
 446   (interactive "e")
 447   (mouse-minibuffer-check click)
 448   (let ((click-posn (posn-point (event-start click)))
 449         ;; Don't let a subsequent kill command append to this one:
 450         ;; prevent setting this-command to kill-region.
 451         (this-command this-command))
 452     (if (> (mod mouse-selection-click-count 3) 0)
 453         (if (not (and (eq last-command 'mouse-save-then-kill)
 454                       (equal click-posn
 455                              (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 456             ;; Find both ends of the object selected by this click.
 457             (let* ((range
 458                     (mouse-start-end click-posn click-posn
 459                                      mouse-selection-click-count)))
 460               ;; Move whichever end is closer to the click.
 461               ;; That's what xterm does, and it seems reasonable.
 462               (if (< (abs (- click-posn (mark t)))
 463                      (abs (- click-posn (point))))
 464                   (set-mark (car range))
 465                 (goto-char (nth 1 range)))
 466               ;; We have already put the old region in the kill ring.
 467               ;; Replace it with the extended region.
 468               ;; (It would be annoying to make a separate entry.)
 469               (setcar kill-ring (buffer-substring (point) (mark t)))
 470               (if interprogram-cut-function
 471                   (funcall interprogram-cut-function (car kill-ring)))
 472               ;; Arrange for a repeated mouse-3 to kill this region.
 473               (setq mouse-save-then-kill-posn
 474                     (list (car kill-ring) (point) click-posn))
 475               (mouse-show-mark))
 476           ;; If we click this button again without moving it,
 477           ;; that time kill.
 478           (mouse-save-then-kill-delete-region (point) (mark))
 479           (setq mouse-selection-click-count 0)
 480           (setq mouse-save-then-kill-posn nil))
 481       (if (and (eq last-command 'mouse-save-then-kill)
 482                mouse-save-then-kill-posn
 483                (eq (car mouse-save-then-kill-posn) (car kill-ring))
 484                (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 485           ;; If this is the second time we've called
 486           ;; mouse-save-then-kill, delete the text from the buffer.
 487           (progn
 488             (mouse-save-then-kill-delete-region (point) (mark))
 489             ;; After we kill, another click counts as "the first time".
 490             (setq mouse-save-then-kill-posn nil))
 491         (if (or (and (eq last-command 'mouse-save-then-kill)
 492                      mouse-save-then-kill-posn)
 493                 (and mark-active transient-mark-mode)
 494                 (and (eq last-command 'mouse-drag-region)
 495                      (or mark-even-if-inactive
 496                          (not transient-mark-mode))))
 497             ;; We have a selection or suitable region, so adjust it.
 498             (let* ((posn (event-start click))
 499                    (new (posn-point posn)))
 500               (select-window (posn-window posn))
 501               (if (numberp new)
 502                   (progn
 503                     ;; Move whichever end of the region is closer to the click.
 504                     ;; That is what xterm does, and it seems reasonable.
 505                     (if (< (abs (- new (point))) (abs (- new (mark t))))
 506                         (goto-char new)
 507                       (set-mark new))
 508                     (setq deactivate-mark nil)))
 509               (setcar kill-ring (buffer-substring (point) (mark t)))
 510               (if interprogram-cut-function
 511                   (funcall interprogram-cut-function (car kill-ring))))
 512           ;; We just have point, so set mark here.
 513           (mouse-set-mark-fast click)
 514           (kill-ring-save (point) (mark t))
 515           (mouse-show-mark))
 516         (setq mouse-save-then-kill-posn
 517               (list (car kill-ring) (point) click-posn))))))
 518 \f
 519 (global-set-key [M-mouse-1] 'mouse-start-secondary)
 520 (global-set-key [M-drag-mouse-1] 'mouse-set-secondary)
 521 (global-set-key [M-down-mouse-1] 'mouse-drag-secondary)
 522 (global-set-key [M-mouse-3] 'mouse-secondary-save-then-kill)
 523 (global-set-key [M-mouse-2] 'mouse-yank-secondary)
 524
 525 ;; An overlay which records the current secondary selection
 526 ;; or else is deleted when there is no secondary selection.
 527 ;; May be nil.
 528 (defvar mouse-secondary-overlay nil)
 529
 530 ;; A marker which records the specified first end for a secondary selection.
 531 ;; May be nil.
 532 (defvar mouse-secondary-start nil)
 533
 534 (defun mouse-start-secondary (click)
 535   "Set one end of the secondary selection to the position clicked on.
 536 Use \\[mouse-secondary-save-then-kill] to set the other end
 537 and complete the secondary selection."
 538   (interactive "e")
 539   (mouse-minibuffer-check click)
 540   (let ((posn (event-start click)))
 541     (save-excursion
 542       (set-buffer (window-buffer (posn-window posn)))
 543       ;; Cancel any preexisting secondary selection.
 544       (if mouse-secondary-overlay
 545           (delete-overlay mouse-secondary-overlay))
 546       (if (numberp (posn-point posn))
 547           (progn
 548             (or mouse-secondary-start
 549                 (setq mouse-secondary-start (make-marker)))
 550             (move-marker mouse-secondary-start (posn-point posn)))))))
 551
 552 (defun mouse-set-secondary (click)
 553   "Set the secondary selection to the text that the mouse is dragged over.
 554 This must be bound to a mouse drag event."
 555   (interactive "e")
 556   (mouse-minibuffer-check click)
 557   (let ((posn (event-start click))
 558         beg
 559         (end (event-end click)))
 560     (save-excursion
 561       (set-buffer (window-buffer (posn-window posn)))
 562       (if (numberp (posn-point posn))
 563           (setq beg (posn-point posn)))
 564       (if mouse-secondary-overlay
 565           (move-overlay mouse-secondary-overlay beg (posn-point end))
 566         (setq mouse-secondary-overlay (make-overlay beg (posn-point end))))
 567       (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 568
 569 (defun mouse-drag-secondary (start-event)
 570   "Set the secondary selection to the text that the mouse is dragged over.
 571 Highlight the drag area as you move the mouse.
 572 This must be bound to a button-down mouse event."
 573   (interactive "e")
 574   (mouse-minibuffer-check start-event)
 575   (let* ((start-posn (event-start start-event))
 576          (start-point (posn-point start-posn))
 577          (start-window (posn-window start-posn))
 578          (start-frame (window-frame start-window))
 579          (bounds (window-edges start-window))
 580          (top (nth 1 bounds))
 581          (bottom (if (window-minibuffer-p start-window)
 582                      (nth 3 bounds)
 583                    ;; Don't count the mode line.
 584                    (1- (nth 3 bounds))))
 585          (click-count (1- (event-click-count start-event))))
 586     (save-excursion
 587       (set-buffer (window-buffer start-window))
 588       (setq mouse-selection-click-count click-count)
 589       (or mouse-secondary-overlay
 590           (setq mouse-secondary-overlay
 591                 (make-overlay (point) (point))))
 592       (overlay-put mouse-secondary-overlay 'face 'secondary-selection)
 593       (if (> (mod click-count 3) 0)
 594           ;; Double or triple press: make an initial selection
 595           ;; of one word or line.
 596           (let ((range (mouse-start-end start-point start-point click-count)))
 597             (set-marker mouse-secondary-start nil)
 598             (move-overlay mouse-secondary-overlay 1 1
 599                           (window-buffer start-window))
 600             (move-overlay mouse-secondary-overlay (car range) (nth 1 range)
 601                           (window-buffer start-window)))
 602         ;; Single-press: cancel any preexisting secondary selection.
 603         (or mouse-secondary-start
 604             (setq mouse-secondary-start (make-marker)))
 605         (set-marker mouse-secondary-start start-point)
 606         (delete-overlay mouse-secondary-overlay))
 607       (let (event end end-point)
 608         (track-mouse
 609           (while (progn
 610                    (setq event (read-event))
 611                    (or (mouse-movement-p event)
 612                        (eq (car-safe event) 'switch-frame)))
 613
 614             (if (eq (car-safe event) 'switch-frame)
 615                 nil
 616               (setq end (event-end event)
 617                     end-point (posn-point end))
 618               (cond
 619
 620                ;; Ignore switch-frame events.
 621                ((eq (car-safe event) 'switch-frame))
 622
 623                ;; Are we moving within the original window?
 624                ((and (eq (posn-window end) start-window)
 625                      (integer-or-marker-p end-point))
 626                 (if (/= start-point end-point)
 627                     (set-marker mouse-secondary-start nil))
 628                 (let ((range (mouse-start-end start-point end-point
 629                                               click-count)))
 630                   (move-overlay mouse-secondary-overlay
 631                                 (car range) (nth 1 range))))
 632
 633                ;; Are we moving on a different window on the same frame?
 634                ((and (windowp (posn-window end))
 635                      (eq (window-frame (posn-window end)) start-frame))
 636                 (let ((mouse-row
 637                        (+ (nth 1 (window-edges (posn-window end)))
 638                           (cdr (posn-col-row end)))))
 639                   (cond
 640                    ((< mouse-row top)
 641                     (mouse-scroll-subr
 642                      (- mouse-row top) mouse-secondary-overlay start-point))
 643                    ((and (not (eobp))
 644                          (>= mouse-row bottom))
 645                     (mouse-scroll-subr (1+ (- mouse-row bottom))
 646                                        mouse-drag-overlay start-point)))))
 647
 648                (t
 649                 (let ((mouse-y (cdr (cdr (mouse-position))))
 650                       (menu-bar-lines (or (cdr (assq 'menu-bar-lines
 651                                                      (frame-parameters)))
 652                                           0)))
 653
 654                   ;; Are we on the menu bar?
 655                   (and (integerp mouse-y) (< mouse-y menu-bar-lines)
 656                        (mouse-scroll-subr (- mouse-y menu-bar-lines)
 657                                           mouse-secondary-overlay start-point))))))))
 658
 659         (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 660                  (eq (posn-window (event-end event)) start-window)
 661                  (numberp (posn-point (event-end event))))
 662             (if (marker-position mouse-secondary-start)
 663                 (save-window-excursion
 664                   (delete-overlay mouse-secondary-overlay)
 665                   (x-set-selection 'SECONDARY nil)
 666                   (select-window start-window)
 667                   (save-excursion
 668                     (goto-char mouse-secondary-start)
 669                     (sit-for 1)))
 670               (x-set-selection
 671                'SECONDARY
 672                (buffer-substring (overlay-start mouse-secondary-overlay)
 673                                  (overlay-end mouse-secondary-overlay)))))))))
 674
 675 (defun mouse-yank-secondary (click)
 676   "Insert the secondary selection at the position clicked on.
 677 Move point to the end of the inserted text.
 678 If `mouse-yank-at-point' is non-nil, insert at point
 679 regardless of where you click."
 680   (interactive "e")
 681   (or mouse-yank-at-point (mouse-set-point click))
 682   (insert (x-get-selection 'SECONDARY)))
 683
 684 (defun mouse-kill-secondary ()
 685   "Kill the text in the secondary selection.
 686 This is intended more as a keyboard command than as a mouse command
 687 but it can work as either one.
 688
 689 The current buffer (in case of keyboard use), or the buffer clicked on,
 690 must be the one that the secondary selection is in.  This requirement
 691 is to prevent accidents."
 692   (interactive)
 693   (let* ((keys (this-command-keys))
 694          (click (elt keys (1- (length keys)))))
 695     (or (eq (overlay-buffer mouse-secondary-overlay)
 696             (if (listp click)
 697                 (window-buffer (posn-window (event-start click)))
 698               (current-buffer)))
 699         (error "Select or click on the buffer where the secondary selection is")))
 700   (save-excursion
 701     (set-buffer (overlay-buffer mouse-secondary-overlay))
 702     (kill-region (overlay-start mouse-secondary-overlay)
 703                  (overlay-end mouse-secondary-overlay)))
 704   (delete-overlay mouse-secondary-overlay)
 705   (x-set-selection 'SECONDARY nil)
 706   (setq mouse-secondary-overlay nil))
 707
 708 (defun mouse-secondary-save-then-kill (click)
 709   "Save text to point in kill ring; the second time, kill the text.
 710 If the text between point and the mouse is the same as what's
 711 at the front of the kill ring, this deletes the text.
 712 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 713 which prepares for a second click to delete the text.
 714
 715 If you have selected words or lines, this command extends the
 716 selection through the word or line clicked on.  If you do this
 717 again in a different position, it extends the selection again.
 718 If you do this twice in the same position, the selection is killed."
 719   (interactive "e")
 720   (mouse-minibuffer-check click)
 721   (let ((posn (event-start click))
 722         (click-posn (posn-point (event-start click)))
 723         ;; Don't let a subsequent kill command append to this one:
 724         ;; prevent setting this-command to kill-region.
 725         (this-command this-command))
 726     (or (eq (window-buffer (posn-window posn))
 727             (or (and mouse-secondary-overlay
 728                      (overlay-buffer mouse-secondary-overlay))
 729                 (if mouse-secondary-start
 730                     (marker-buffer mouse-secondary-start))))
 731         (error "Wrong buffer"))
 732     (save-excursion
 733       (set-buffer (window-buffer (posn-window posn)))
 734       (if (> (mod mouse-selection-click-count 3) 0)
 735           (if (not (and (eq last-command 'mouse-secondary-save-then-kill)
 736                         (equal click-posn
 737                                (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 738               ;; Find both ends of the object selected by this click.
 739               (let* ((range
 740                       (mouse-start-end click-posn click-posn
 741                                        mouse-selection-click-count)))
 742                 ;; Move whichever end is closer to the click.
 743                 ;; That's what xterm does, and it seems reasonable.
 744                 (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 745                        (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 746                     (move-overlay mouse-secondary-overlay (car range)
 747                                   (overlay-end mouse-secondary-overlay))
 748                   (move-overlay mouse-secondary-overlay
 749                                 (overlay-start mouse-secondary-overlay)
 750                                 (nth 1 range)))
 751                 ;; We have already put the old region in the kill ring.
 752                 ;; Replace it with the extended region.
 753                 ;; (It would be annoying to make a separate entry.)
 754                 (setcar kill-ring (buffer-substring
 755                                    (overlay-start mouse-secondary-overlay)
 756                                    (overlay-end mouse-secondary-overlay)))
 757                 (if interprogram-cut-function
 758                     (funcall interprogram-cut-function (car kill-ring)))
 759                 ;; Arrange for a repeated mouse-3 to kill this region.
 760                 (setq mouse-save-then-kill-posn
 761                       (list (car kill-ring) (point) click-posn)))
 762             ;; If we click this button again without moving it,
 763             ;; that time kill.
 764             (progn
 765               (mouse-save-then-kill-delete-region
 766                (overlay-start mouse-secondary-overlay)
 767                (overlay-end mouse-secondary-overlay))
 768               (setq mouse-save-then-kill-posn nil)
 769               (setq mouse-selection-click-count 0)
 770               (delete-overlay mouse-secondary-overlay)))
 771         (if (and (eq last-command 'mouse-secondary-save-then-kill)
 772                  mouse-save-then-kill-posn
 773                  (eq (car mouse-save-then-kill-posn) (car kill-ring))
 774                  (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 775             ;; If this is the second time we've called
 776             ;; mouse-secondary-save-then-kill, delete the text from the buffer.
 777             (progn
 778               (mouse-save-then-kill-delete-region
 779                (overlay-start mouse-secondary-overlay)
 780                (overlay-end mouse-secondary-overlay))
 781               (setq mouse-save-then-kill-posn nil)
 782               (delete-overlay mouse-secondary-overlay))
 783           (if (overlay-start mouse-secondary-overlay)
 784               ;; We have a selection, so adjust it.
 785               (progn
 786                 (if (numberp click-posn)
 787                     (progn
 788                       ;; Move whichever end of the region is closer to the click.
 789                       ;; That is what xterm does, and it seems reasonable.
 790                       (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 791                              (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 792                           (move-overlay mouse-secondary-overlay click-posn
 793                                         (overlay-end mouse-secondary-overlay))
 794                         (move-overlay mouse-secondary-overlay
 795                                       (overlay-start mouse-secondary-overlay)
 796                                       click-posn))
 797                       (setq deactivate-mark nil)))
 798                 (setcar kill-ring (buffer-substring
 799                                    (overlay-start mouse-secondary-overlay)
 800                                    (overlay-end mouse-secondary-overlay)))
 801                 (if interprogram-cut-function
 802                     (funcall interprogram-cut-function (car kill-ring))))
 803             (if mouse-secondary-start
 804                 ;; All we have is one end of a selection,
 805                 ;; so put the other end here.
 806                 (let ((start (+ 0 mouse-secondary-start)))
 807                   (kill-ring-save start click-posn)
 808                   (if mouse-secondary-overlay
 809                       (move-overlay mouse-secondary-overlay start click-posn)
 810                     (setq mouse-secondary-overlay (make-overlay start click-posn)))
 811                   (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 812           (setq mouse-save-then-kill-posn
 813                 (list (car kill-ring) (point) click-posn))))
 814       (x-set-selection 'SECONDARY
 815                        (if (overlay-buffer mouse-secondary-overlay)
 816                            (buffer-substring
 817                             (overlay-start mouse-secondary-overlay)
 818                             (overlay-end mouse-secondary-overlay)))))))
 819 \f
 820 (defun mouse-buffer-menu (event)
 821   "Pop up a menu of buffers for selection with the mouse.
 822 This switches buffers in the window that you clicked on,
 823 and selects that window."
 824   (interactive "e")
 825   (mouse-minibuffer-check event)
 826   (let ((menu
 827          (list "Buffer Menu"
 828                (cons "Select Buffer"
 829                      (let ((tail (buffer-list))
 830                            (maxbuf 0)
 831                            head)
 832                        (while tail
 833                          (or (eq ?\ (aref (buffer-name (car tail)) 0))
 834                              (setq maxbuf
 835                                    (max maxbuf
 836                                         (length (buffer-name (car tail))))))
 837                          (setq tail (cdr tail)))
 838                        (setq tail (buffer-list))
 839                        (while tail
 840                          (let ((elt (car tail)))
 841                            (if (not (string-match "^ "
 842                                                   (buffer-name elt)))
 843                                (setq head (cons
 844                                            (cons
 845                                             (format
 846                                              (format "%%%ds  %%s%%s  %%s"
 847                                                      maxbuf)
 848                                              (buffer-name elt)
 849                                              (if (buffer-modified-p elt)
 850                                                  "*" " ")
 851                                              (save-excursion
 852                                                (set-buffer elt)
 853                                                (if buffer-read-only "%" " "))
 854                                              (or (buffer-file-name elt) ""))
 855                                             elt)
 856                                            head))))
 857                          (setq tail (cdr tail)))
 858                        (reverse head))))))
 859     (let ((buf (x-popup-menu event menu))
 860           (window (posn-window (event-start event))))
 861       (if buf
 862           (progn
 863             (or (framep window) (select-window window))
 864             (switch-to-buffer buf))))))
 865 \f
 866 ;;; These need to be rewritten for the new scroll bar implementation.
 867
 868 ;;;!! ;; Commands for the scroll bar.
 869 ;;;!!
 870 ;;;!! (defun mouse-scroll-down (click)
 871 ;;;!!   (interactive "@e")
 872 ;;;!!   (scroll-down (1+ (cdr (mouse-coords click)))))
 873 ;;;!!
 874 ;;;!! (defun mouse-scroll-up (click)
 875 ;;;!!   (interactive "@e")
 876 ;;;!!   (scroll-up (1+ (cdr (mouse-coords click)))))
 877 ;;;!!
 878 ;;;!! (defun mouse-scroll-down-full ()
 879 ;;;!!   (interactive "@")
 880 ;;;!!   (scroll-down nil))
 881 ;;;!!
 882 ;;;!! (defun mouse-scroll-up-full ()
 883 ;;;!!   (interactive "@")
 884 ;;;!!   (scroll-up nil))
 885 ;;;!!
 886 ;;;!! (defun mouse-scroll-move-cursor (click)
 887 ;;;!!   (interactive "@e")
 888 ;;;!!   (move-to-window-line (1+ (cdr (mouse-coords click)))))
 889 ;;;!!
 890 ;;;!! (defun mouse-scroll-absolute (event)
 891 ;;;!!   (interactive "@e")
 892 ;;;!!   (let* ((pos (car event))
 893 ;;;!!    (position (car pos))
 894 ;;;!!    (length (car (cdr pos))))
 895 ;;;!!     (if (<= length 0) (setq length 1))
 896 ;;;!!     (let* ((scale-factor (max 1 (/ length (/ 8000000 (buffer-size)))))
 897 ;;;!!      (newpos (* (/ (* (/ (buffer-size) scale-factor)
 898 ;;;!!                       position)
 899 ;;;!!                    length)
 900 ;;;!!                 scale-factor)))
 901 ;;;!!       (goto-char newpos)
 902 ;;;!!       (recenter '(4)))))
 903 ;;;!!
 904 ;;;!! (defun mouse-scroll-left (click)
 905 ;;;!!   (interactive "@e")
 906 ;;;!!   (scroll-left (1+ (car (mouse-coords click)))))
 907 ;;;!!
 908 ;;;!! (defun mouse-scroll-right (click)
 909 ;;;!!   (interactive "@e")
 910 ;;;!!   (scroll-right (1+ (car (mouse-coords click)))))
 911 ;;;!!
 912 ;;;!! (defun mouse-scroll-left-full ()
 913 ;;;!!   (interactive "@")
 914 ;;;!!   (scroll-left nil))
 915 ;;;!!
 916 ;;;!! (defun mouse-scroll-right-full ()
 917 ;;;!!   (interactive "@")
 918 ;;;!!   (scroll-right nil))
 919 ;;;!!
 920 ;;;!! (defun mouse-scroll-move-cursor-horizontally (click)
 921 ;;;!!   (interactive "@e")
 922 ;;;!!   (move-to-column (1+ (car (mouse-coords click)))))
 923 ;;;!!
 924 ;;;!! (defun mouse-scroll-absolute-horizontally (event)
 925 ;;;!!   (interactive "@e")
 926 ;;;!!   (let* ((pos (car event))
 927 ;;;!!    (position (car pos))
 928 ;;;!!    (length (car (cdr pos))))
 929 ;;;!!   (set-window-hscroll (selected-window) 33)))
 930 ;;;!!
 931 ;;;!! (global-set-key [scroll-bar mouse-1] 'mouse-scroll-up)
 932 ;;;!! (global-set-key [scroll-bar mouse-2] 'mouse-scroll-absolute)
 933 ;;;!! (global-set-key [scroll-bar mouse-3] 'mouse-scroll-down)
 934 ;;;!!
 935 ;;;!! (global-set-key [vertical-slider mouse-1] 'mouse-scroll-move-cursor)
 936 ;;;!! (global-set-key [vertical-slider mouse-2] 'mouse-scroll-move-cursor)
 937 ;;;!! (global-set-key [vertical-slider mouse-3] 'mouse-scroll-move-cursor)
 938 ;;;!!
 939 ;;;!! (global-set-key [thumbup mouse-1] 'mouse-scroll-up-full)
 940 ;;;!! (global-set-key [thumbup mouse-2] 'mouse-scroll-up-full)
 941 ;;;!! (global-set-key [thumbup mouse-3] 'mouse-scroll-up-full)
 942 ;;;!!
 943 ;;;!! (global-set-key [thumbdown mouse-1] 'mouse-scroll-down-full)
 944 ;;;!! (global-set-key [thumbdown mouse-2] 'mouse-scroll-down-full)
 945 ;;;!! (global-set-key [thumbdown mouse-3] 'mouse-scroll-down-full)
 946 ;;;!!
 947 ;;;!! (global-set-key [horizontal-scroll-bar mouse-1] 'mouse-scroll-left)
 948 ;;;!! (global-set-key [horizontal-scroll-bar mouse-2]
 949 ;;;!!           'mouse-scroll-absolute-horizontally)
 950 ;;;!! (global-set-key [horizontal-scroll-bar mouse-3] 'mouse-scroll-right)
 951 ;;;!!
 952 ;;;!! (global-set-key [horizontal-slider mouse-1]
 953 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 954 ;;;!! (global-set-key [horizontal-slider mouse-2]
 955 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 956 ;;;!! (global-set-key [horizontal-slider mouse-3]
 957 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 958 ;;;!!
 959 ;;;!! (global-set-key [thumbleft mouse-1] 'mouse-scroll-left-full)
 960 ;;;!! (global-set-key [thumbleft mouse-2] 'mouse-scroll-left-full)
 961 ;;;!! (global-set-key [thumbleft mouse-3] 'mouse-scroll-left-full)
 962 ;;;!!
 963 ;;;!! (global-set-key [thumbright mouse-1] 'mouse-scroll-right-full)
 964 ;;;!! (global-set-key [thumbright mouse-2] 'mouse-scroll-right-full)
 965 ;;;!! (global-set-key [thumbright mouse-3] 'mouse-scroll-right-full)
 966 ;;;!!
 967 ;;;!! (global-set-key [horizontal-scroll-bar S-mouse-2]
 968 ;;;!!           'mouse-split-window-horizontally)
 969 ;;;!! (global-set-key [mode-line S-mouse-2]
 970 ;;;!!           'mouse-split-window-horizontally)
 971 ;;;!! (global-set-key [vertical-scroll-bar S-mouse-2]
 972 ;;;!!           'mouse-split-window)
 973 \f
 974 ;;;!! ;;;;
 975 ;;;!! ;;;; Here are experimental things being tested.  Mouse events
 976 ;;;!! ;;;; are of the form:
 977 ;;;!! ;;;;      ((x y) window screen-part key-sequence timestamp)
 978 ;;;!! ;;
 979 ;;;!! ;;;;
 980 ;;;!! ;;;; Dynamically track mouse coordinates
 981 ;;;!! ;;;;
 982 ;;;!! ;;
 983 ;;;!! ;;(defun track-mouse (event)
 984 ;;;!! ;;  "Track the coordinates, absolute and relative, of the mouse."
 985 ;;;!! ;;  (interactive "@e")
 986 ;;;!! ;;  (while mouse-grabbed
 987 ;;;!! ;;    (let* ((pos (read-mouse-position (selected-screen)))
 988 ;;;!! ;;           (abs-x (car pos))
 989 ;;;!! ;;           (abs-y (cdr pos))
 990 ;;;!! ;;           (relative-coordinate (coordinates-in-window-p
 991 ;;;!! ;;                                 (list (car pos) (cdr pos))
 992 ;;;!! ;;                                 (selected-window))))
 993 ;;;!! ;;      (if (consp relative-coordinate)
 994 ;;;!! ;;          (message "mouse: [%d %d], (%d %d)" abs-x abs-y
 995 ;;;!! ;;                   (car relative-coordinate)
 996 ;;;!! ;;                   (car (cdr relative-coordinate)))
 997 ;;;!! ;;        (message "mouse: [%d %d]" abs-x abs-y)))))
 998 ;;;!!
 999 ;;;!! ;;
1000 ;;;!! ;; Dynamically put a box around the line indicated by point
1001 ;;;!! ;;
1002 ;;;!! ;;
1003 ;;;!! ;;(require 'backquote)
1004 ;;;!! ;;
1005 ;;;!! ;;(defun mouse-select-buffer-line (event)
1006 ;;;!! ;;  (interactive "@e")
1007 ;;;!! ;;  (let ((relative-coordinate
1008 ;;;!! ;;         (coordinates-in-window-p (car event) (selected-window)))
1009 ;;;!! ;;        (abs-y (car (cdr (car event)))))
1010 ;;;!! ;;    (if (consp relative-coordinate)
1011 ;;;!! ;;        (progn
1012 ;;;!! ;;          (save-excursion
1013 ;;;!! ;;            (move-to-window-line (car (cdr relative-coordinate)))
1014 ;;;!! ;;            (x-draw-rectangle
1015 ;;;!! ;;             (selected-screen)
1016 ;;;!! ;;             abs-y 0
1017 ;;;!! ;;             (save-excursion
1018 ;;;!! ;;                 (move-to-window-line (car (cdr relative-coordinate)))
1019 ;;;!! ;;                 (end-of-line)
1020 ;;;!! ;;                 (push-mark nil t)
1021 ;;;!! ;;                 (beginning-of-line)
1022 ;;;!! ;;                 (- (region-end) (region-beginning))) 1))
1023 ;;;!! ;;          (sit-for 1)
1024 ;;;!! ;;          (x-erase-rectangle (selected-screen))))))
1025 ;;;!! ;;
1026 ;;;!! ;;(defvar last-line-drawn nil)
1027 ;;;!! ;;(defvar begin-delim "[^ \t]")
1028 ;;;!! ;;(defvar end-delim   "[^ \t]")
1029 ;;;!! ;;
1030 ;;;!! ;;(defun mouse-boxing (event)
1031 ;;;!! ;;  (interactive "@e")
1032 ;;;!! ;;  (save-excursion
1033 ;;;!! ;;    (let ((screen (selected-screen)))
1034 ;;;!! ;;      (while (= (x-mouse-events) 0)
1035 ;;;!! ;;        (let* ((pos (read-mouse-position screen))
1036 ;;;!! ;;               (abs-x (car pos))
1037 ;;;!! ;;               (abs-y (cdr pos))
1038 ;;;!! ;;               (relative-coordinate
1039 ;;;!! ;;                (coordinates-in-window-p (` ((, abs-x) (, abs-y)))
1040 ;;;!! ;;                                         (selected-window)))
1041 ;;;!! ;;               (begin-reg nil)
1042 ;;;!! ;;               (end-reg nil)
1043 ;;;!! ;;               (end-column nil)
1044 ;;;!! ;;               (begin-column nil))
1045 ;;;!! ;;          (if (and (consp relative-coordinate)
1046 ;;;!! ;;                   (or (not last-line-drawn)
1047 ;;;!! ;;                       (not (= last-line-drawn abs-y))))
1048 ;;;!! ;;              (progn
1049 ;;;!! ;;                (move-to-window-line (car (cdr relative-coordinate)))
1050 ;;;!! ;;                (if (= (following-char) 10)
1051 ;;;!! ;;                    ()
1052 ;;;!! ;;                  (progn
1053 ;;;!! ;;                    (setq begin-reg (1- (re-search-forward end-delim)))
1054 ;;;!! ;;                    (setq begin-column (1- (current-column)))
1055 ;;;!! ;;                    (end-of-line)
1056 ;;;!! ;;                    (setq end-reg (1+ (re-search-backward begin-delim)))
1057 ;;;!! ;;                    (setq end-column (1+ (current-column)))
1058 ;;;!! ;;                    (message "%s" (buffer-substring begin-reg end-reg))
1059 ;;;!! ;;                    (x-draw-rectangle screen
1060 ;;;!! ;;                                      (setq last-line-drawn abs-y)
1061 ;;;!! ;;                                      begin-column
1062 ;;;!! ;;                                      (- end-column begin-column) 1))))))))))
1063 ;;;!! ;;
1064 ;;;!! ;;(defun mouse-erase-box ()
1065 ;;;!! ;;  (interactive)
1066 ;;;!! ;;  (if last-line-drawn
1067 ;;;!! ;;      (progn
1068 ;;;!! ;;        (x-erase-rectangle (selected-screen))
1069 ;;;!! ;;        (setq last-line-drawn nil))))
1070 ;;;!!
1071 ;;;!! ;;; (defun test-x-rectangle ()
1072 ;;;!! ;;;   (use-local-mouse-map (setq rectangle-test-map (make-sparse-keymap)))
1073 ;;;!! ;;;   (define-key rectangle-test-map mouse-motion-button-left 'mouse-boxing)
1074 ;;;!! ;;;   (define-key rectangle-test-map mouse-button-left-up 'mouse-erase-box))
1075 ;;;!!
1076 ;;;!! ;;
1077 ;;;!! ;; Here is how to do double clicking in lisp.  About to change.
1078 ;;;!! ;;
1079 ;;;!!
1080 ;;;!! (defvar double-start nil)
1081 ;;;!! (defconst double-click-interval 300
1082 ;;;!!   "Max ticks between clicks")
1083 ;;;!!
1084 ;;;!! (defun double-down (event)
1085 ;;;!!   (interactive "@e")
1086 ;;;!!   (if double-start
1087 ;;;!!       (let ((interval (- (nth 4 event) double-start)))
1088 ;;;!!   (if (< interval double-click-interval)
1089 ;;;!!       (progn
1090 ;;;!!         (backward-up-list 1)
1091 ;;;!!         ;;      (message "Interval %d" interval)
1092 ;;;!!         (sleep-for 1)))
1093 ;;;!!   (setq double-start nil))
1094 ;;;!!     (setq double-start (nth 4 event))))
1095 ;;;!!
1096 ;;;!! (defun double-up (event)
1097 ;;;!!   (interactive "@e")
1098 ;;;!!   (and double-start
1099 ;;;!!        (> (- (nth 4 event ) double-start) double-click-interval)
1100 ;;;!!        (setq double-start nil)))
1101 ;;;!!
1102 ;;;!! ;;; (defun x-test-doubleclick ()
1103 ;;;!! ;;;   (use-local-mouse-map (setq doubleclick-test-map (make-sparse-keymap)))
1104 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left 'double-down)
1105 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left-up 'double-up))
1106 ;;;!!
1107 ;;;!! ;;
1108 ;;;!! ;; This scrolls while button is depressed.  Use preferable in scroll bar.
1109 ;;;!! ;;
1110 ;;;!!
1111 ;;;!! (defvar scrolled-lines 0)
1112 ;;;!! (defconst scroll-speed 1)
1113 ;;;!!
1114 ;;;!! (defun incr-scroll-down (event)
1115 ;;;!!   (interactive "@e")
1116 ;;;!!   (setq scrolled-lines 0)
1117 ;;;!!   (incremental-scroll scroll-speed))
1118 ;;;!!
1119 ;;;!! (defun incr-scroll-up (event)
1120 ;;;!!   (interactive "@e")
1121 ;;;!!   (setq scrolled-lines 0)
1122 ;;;!!   (incremental-scroll (- scroll-speed)))
1123 ;;;!!
1124 ;;;!! (defun incremental-scroll (n)
1125 ;;;!!   (while (= (x-mouse-events) 0)
1126 ;;;!!     (setq scrolled-lines (1+ (* scroll-speed scrolled-lines)))
1127 ;;;!!     (scroll-down n)
1128 ;;;!!     (sit-for 300 t)))
1129 ;;;!!
1130 ;;;!! (defun incr-scroll-stop (event)
1131 ;;;!!   (interactive "@e")
1132 ;;;!!   (message "Scrolled %d lines" scrolled-lines)
1133 ;;;!!   (setq scrolled-lines 0)
1134 ;;;!!   (sleep-for 1))
1135 ;;;!!
1136 ;;;!! ;;; (defun x-testing-scroll ()
1137 ;;;!! ;;;   (let ((scrolling-map (function mouse-vertical-scroll-bar-prefix)))
1138 ;;;!! ;;;     (define-key scrolling-map mouse-button-left 'incr-scroll-down)
1139 ;;;!! ;;;     (define-key scrolling-map mouse-button-right 'incr-scroll-up)
1140 ;;;!! ;;;     (define-key scrolling-map mouse-button-left-up 'incr-scroll-stop)
1141 ;;;!! ;;;     (define-key scrolling-map mouse-button-right-up 'incr-scroll-stop)))
1142 ;;;!!
1143 ;;;!! ;;
1144 ;;;!! ;; Some playthings suitable for picture mode?  They need work.
1145 ;;;!! ;;
1146 ;;;!!
1147 ;;;!! (defun mouse-kill-rectangle (event)
1148 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1149 ;;;!!   (interactive "@e")
1150 ;;;!!   (let ((point-save (point)))
1151 ;;;!!     (save-excursion
1152 ;;;!!       (mouse-set-point event)
1153 ;;;!!       (push-mark nil t)
1154 ;;;!!       (if (> point-save (point))
1155 ;;;!!     (kill-rectangle (point) point-save)
1156 ;;;!!   (kill-rectangle point-save (point))))))
1157 ;;;!!
1158 ;;;!! (defun mouse-open-rectangle (event)
1159 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1160 ;;;!!   (interactive "@e")
1161 ;;;!!   (let ((point-save (point)))
1162 ;;;!!     (save-excursion
1163 ;;;!!       (mouse-set-point event)
1164 ;;;!!       (push-mark nil t)
1165 ;;;!!       (if (> point-save (point))
1166 ;;;!!     (open-rectangle (point) point-save)
1167 ;;;!!   (open-rectangle point-save (point))))))
1168 ;;;!!
1169 ;;;!! ;; Must be a better way to do this.
1170 ;;;!!
1171 ;;;!! (defun mouse-multiple-insert (n char)
1172 ;;;!!   (while (> n 0)
1173 ;;;!!     (insert char)
1174 ;;;!!     (setq n (1- n))))
1175 ;;;!!
1176 ;;;!! ;; What this could do is not finalize until button was released.
1177 ;;;!!
1178 ;;;!! (defun mouse-move-text (event)
1179 ;;;!!   "Move text from point to cursor position, inserting spaces."
1180 ;;;!!   (interactive "@e")
1181 ;;;!!   (let* ((relative-coordinate
1182 ;;;!!     (coordinates-in-window-p (car event) (selected-window))))
1183 ;;;!!     (if (consp relative-coordinate)
1184 ;;;!!   (cond ((> (current-column) (car relative-coordinate))
1185 ;;;!!          (delete-char
1186 ;;;!!           (- (car relative-coordinate) (current-column))))
1187 ;;;!!         ((< (current-column) (car relative-coordinate))
1188 ;;;!!          (mouse-multiple-insert
1189 ;;;!!           (- (car relative-coordinate) (current-column)) " "))
1190 ;;;!!         ((= (current-column) (car relative-coordinate)) (ding))))))
1191 \f
1192 ;; Choose a completion with the mouse.
1193
1194 (defun mouse-choose-completion (event)
1195   "Click on an alternative in the `*Completions*' buffer to choose it."
1196   (interactive "e")
1197   (let ((buffer (window-buffer))
1198         choice)
1199     (save-excursion
1200       (set-buffer (window-buffer (posn-window (event-start event))))
1201       (if completion-reference-buffer
1202           (setq buffer completion-reference-buffer))
1203       (save-excursion
1204         (goto-char (posn-point (event-start event)))
1205         (skip-chars-backward "^ \t\n")
1206         (let ((beg (point)))
1207           (skip-chars-forward "^ \t\n")
1208           (setq choice (buffer-substring beg (point))))))
1209     (let ((owindow (selected-window)))
1210       (select-window (posn-window (event-start event)))
1211       (bury-buffer)
1212       (select-window owindow))
1213     (choose-completion-string choice buffer)))
1214 \f
1215 ;; Font selection.
1216
1217 (defun font-menu-add-default ()
1218   (let* ((default (cdr (assq 'font (frame-parameters (selected-frame)))))
1219          (font-alist x-fixed-font-alist)
1220          (elt (or (assoc "Misc" font-alist) (nth 1 font-alist))))
1221     (if (assoc "Default" elt)
1222         (delete (assoc "Default" elt) elt))
1223     (setcdr elt
1224             (cons (list "Default"
1225                         (cdr (assq 'font (frame-parameters (selected-frame)))))
1226                   (cdr elt)))))
1227
1228 (defvar x-fixed-font-alist
1229   '("Font menu"
1230     ("Misc"
1231      ("6x10" "-misc-fixed-medium-r-normal--10-100-75-75-c-60-*-1" "6x10")
1232      ("6x12" "-misc-fixed-medium-r-semicondensed--12-110-75-75-c-60-*-1" "6x12")
1233      ("6x13" "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-*-1" "6x13")
1234      ("lucida 13"
1235       "-b&h-lucidatypewriter-medium-r-normal-sans-0-0-0-0-m-0-*-1")
1236      ("7x13" "-misc-fixed-medium-r-normal--13-120-75-75-c-70-*-1" "7x13")
1237      ("7x14" "-misc-fixed-medium-r-normal--14-130-75-75-c-70-*-1" "7x14")
1238      ("9x15" "-misc-fixed-medium-r-normal--15-140-*-*-c-*-*-1" "9x15")
1239      ("")
1240      ("clean 8x8" "-schumacher-clean-medium-r-normal--*-80-*-*-c-*-*-1")
1241      ("clean 8x14" "-schumacher-clean-medium-r-normal--*-140-*-*-c-*-*-1")
1242      ("clean 8x10" "-schumacher-clean-medium-r-normal--*-100-*-*-c-*-*-1")
1243      ("clean 8x16" "-schumacher-clean-medium-r-normal--*-160-*-*-c-*-*-1")
1244      ("")
1245      ("sony 8x16" "-sony-fixed-medium-r-normal--16-120-100-100-c-80-*-1")
1246      ("")
1247      ("fixed" "fixed")
1248      ("10x20" "10x20")
1249      ("11x18" "11x18")
1250      ("12x24" "12x24"))
1251 ;;; We don't seem to have these; who knows what they are.
1252 ;;;    ("fg-18" "fg-18")
1253 ;;;    ("fg-25" "fg-25")
1254 ;;;    ("lucidasanstypewriter-12" "lucidasanstypewriter-12")
1255 ;;;    ("lucidasanstypewriter-bold-14" "lucidasanstypewriter-bold-14")
1256 ;;;    ("lucidasanstypewriter-bold-24" "lucidasanstypewriter-bold-24")
1257 ;;;    ("lucidatypewriter-bold-r-24" "-b&h-lucidatypewriter-bold-r-normal-sans-24-240-75-75-m-140-iso8859-1")
1258 ;;;    ("fixed-medium-20" "-misc-fixed-medium-*-*-*-20-*-*-*-*-*-*-*")
1259     ("Courier"
1260      ("8" "-adobe-courier-medium-r-normal--*-80-*-*-m-*-iso8859-1")
1261      ("10" "-adobe-courier-medium-r-normal--*-100-*-*-m-*-iso8859-1")
1262      ("12" "-adobe-courier-medium-r-normal--*-120-*-*-m-*-iso8859-1")
1263      ("14" "-adobe-courier-medium-r-normal--*-140-*-*-m-*-iso8859-1")
1264      ("18" "-adobe-courier-medium-r-normal--*-180-*-*-m-*-iso8859-1")
1265      ("24" "-adobe-courier-medium-r-normal--*-240-*-*-m-*-iso8859-1")
1266      ("8 bold" "-adobe-courier-bold-r-normal--*-80-*-*-m-*-iso8859-1")
1267      ("10 bold" "-adobe-courier-bold-r-normal--*-100-*-*-m-*-iso8859-1")
1268      ("12 bold" "-adobe-courier-bold-r-normal--*-120-*-*-m-*-iso8859-1")
1269      ("14 bold" "-adobe-courier-bold-r-normal--*-140-*-*-m-*-iso8859-1")
1270      ("18 bold" "-adobe-courier-bold-r-normal--*-180-*-*-m-*-iso8859-1")
1271      ("24 bold" "-adobe-courier-bold-r-normal--*-240-*-*-m-*-iso8859-1")
1272      ("8 slant" "-adobe-courier-medium-o-normal--*-80-*-*-m-*-iso8859-1")
1273      ("10 slant" "-adobe-courier-medium-o-normal--*-100-*-*-m-*-iso8859-1")
1274      ("12 slant" "-adobe-courier-medium-o-normal--*-120-*-*-m-*-iso8859-1")
1275      ("14 slant" "-adobe-courier-medium-o-normal--*-140-*-*-m-*-iso8859-1")
1276      ("18 slant" "-adobe-courier-medium-o-normal--*-180-*-*-m-*-iso8859-1")
1277      ("24 slant" "-adobe-courier-medium-o-normal--*-240-*-*-m-*-iso8859-1")
1278      ("8 bold slant" "-adobe-courier-bold-o-normal--*-80-*-*-m-*-iso8859-1")
1279      ("10 bold slant" "-adobe-courier-bold-o-normal--*-100-*-*-m-*-iso8859-1")
1280      ("12 bold slant" "-adobe-courier-bold-o-normal--*-120-*-*-m-*-iso8859-1")
1281      ("14 bold slant" "-adobe-courier-bold-o-normal--*-140-*-*-m-*-iso8859-1")
1282      ("18 bold slant" "-adobe-courier-bold-o-normal--*-180-*-*-m-*-iso8859-1")
1283      ("24 bold slant" "-adobe-courier-bold-o-normal--*-240-*-*-m-*-iso8859-1"))
1284     )
1285   "X fonts suitable for use in Emacs.")
1286
1287 (defun mouse-set-font (&rest fonts)
1288   "Select an emacs font from a list of known good fonts"
1289   (interactive
1290    (x-popup-menu last-nonmenu-event x-fixed-font-alist))
1291   (if fonts
1292       (let (font)
1293         (while fonts
1294           (condition-case nil
1295               (progn
1296                 (set-default-font (car fonts))
1297                 (setq font (car fonts))
1298                 (setq fonts nil))
1299             (error
1300              (setq fonts (cdr fonts)))))
1301         (if (null font)
1302             (error "Font not found")))))
1303 \f
1304 ;;; Bindings for mouse commands.
1305
1306 (define-key global-map [down-mouse-1] 'mouse-drag-region)
1307 (global-set-key [mouse-1]       'mouse-set-point)
1308 (global-set-key [drag-mouse-1]  'mouse-set-region)
1309
1310 ;; These are tested for in mouse-drag-region.
1311 (global-set-key [double-mouse-1] 'mouse-set-point)
1312 (global-set-key [triple-mouse-1] 'mouse-set-point)
1313
1314 (global-set-key [mouse-2]       'mouse-yank-at-click)
1315 (global-set-key [mouse-3]       'mouse-save-then-kill)
1316
1317 ;; By binding these to down-going events, we let the user use the up-going
1318 ;; event to make the selection, saving a click.
1319 (global-set-key [C-down-mouse-1]        'mouse-buffer-menu)
1320 (global-set-key [C-down-mouse-3]        'mouse-set-font)
1321
1322 ;; Replaced with dragging mouse-1
1323 ;; (global-set-key [S-mouse-1]  'mouse-set-mark)
1324
1325 (global-set-key [mode-line mouse-1] 'mouse-select-window)
1326 (global-set-key [mode-line mouse-2] 'mouse-delete-other-windows)
1327 (global-set-key [mode-line mouse-3] 'mouse-delete-window)
1328 (global-set-key [mode-line C-mouse-2] 'mouse-split-window-horizontally)
1329
1330 (provide 'mouse)
1331
1332 ;;; mouse.el ends here