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-delete-window (click)
  43   "Delete the window you click on.
  44 This must be bound to a mouse click."
  45   (interactive "e")
  46   (delete-window (posn-window (event-start click))))
  47
  48 (defun mouse-select-window (click)
  49   "Select the window clicked on; don't move point."
  50   (interactive "e")
  51   (let ((oframe (selected-frame))
  52         (frame (window-frame (posn-window (event-start click)))))
  53     (select-window (posn-window (event-start click)))
  54     (raise-frame frame)
  55     (select-frame frame)
  56     (or (eq frame oframe)
  57         (set-mouse-position (selected-frame) (1- (frame-width)) 0))
  58     (unfocus-frame)))
  59
  60 (defun mouse-tear-off-window (click)
  61   "Delete the window clicked on, and create a new frame displaying its buffer."
  62   (interactive "e")
  63   (let* ((window (posn-window (event-start click)))
  64          (buf (window-buffer window))
  65          (frame (new-frame)))
  66     (select-frame frame)
  67     (switch-to-buffer buf)
  68     (delete-window window)))
  69
  70 (defun mouse-delete-other-windows ()
  71   "Delete all window except the one you click on."
  72   (interactive "@")
  73   (delete-other-windows))
  74
  75 (defun mouse-split-window-vertically (click)
  76   "Select Emacs window mouse is on, then split it vertically in half.
  77 The window is split at the line clicked on.
  78 This command must be bound to a mouse click."
  79   (interactive "@e")
  80   (let ((start (event-start click)))
  81     (select-window (posn-window start))
  82     (let ((new-height (if (eq (posn-point start) 'vertical-scroll-bar)
  83                           (scroll-bar-scale (posn-col-row start)
  84                                             (1- (window-height)))
  85                         (1+ (cdr (posn-col-row (event-end click))))))
  86           (first-line window-min-height)
  87           (last-line (- (window-height) window-min-height)))
  88       (if (< last-line first-line)
  89           (error "window too short to split")
  90         (split-window-vertically
  91          (min (max new-height first-line) last-line))))))
  92
  93 (defun mouse-split-window-horizontally (click)
  94   "Select Emacs window mouse is on, then split it horizontally in half.
  95 The window is split at the column clicked on.
  96 This command must be bound to a mouse click."
  97   (interactive "@e")
  98   (let ((start (event-start click)))
  99     (select-window (posn-window start))
 100     (let ((new-width (1+ (car (posn-col-row (event-end click)))))
 101           (first-col window-min-width)
 102           (last-col (- (window-width) window-min-width)))
 103       (if (< last-col first-col)
 104           (error "window too narrow to split")
 105         (split-window-horizontally
 106          (min (max new-width first-col) last-col))))))
 107
 108 (defun mouse-set-point (event)
 109   "Move point to the position clicked on with the mouse.
 110 This should be bound to a mouse click event type."
 111   (interactive "e")
 112   ;; Use event-end in case called from mouse-drag-region.
 113   ;; If EVENT is a click, event-end and event-start give same value.
 114   (let ((posn (event-end event)))
 115     (and (window-minibuffer-p (posn-window posn))
 116          (not (minibuffer-window-active-p (posn-window posn)))
 117          (error "Minibuffer window is not active"))
 118     (select-window (posn-window posn))
 119     (if (numberp (posn-point posn))
 120         (goto-char (posn-point posn)))))
 121
 122 (defun mouse-set-region (click)
 123   "Set the region to the text dragged over, and copy to kill ring.
 124 This should be bound to a mouse drag event."
 125   (interactive "e")
 126   (let ((posn (event-start click))
 127         (end (event-end click)))
 128     (select-window (posn-window posn))
 129     (if (numberp (posn-point posn))
 130         (goto-char (posn-point posn)))
 131     ;; If mark is highlighted, no need to bounce the cursor.
 132     (or (and transient-mark-mode
 133              (eq (framep (selected-frame)) 'x))
 134         (sit-for 1))
 135     (push-mark)
 136     (set-mark (point))
 137     (if (numberp (posn-point end))
 138         (goto-char (posn-point end)))
 139     ;; Don't set this-command to kill-region, so that a following
 140     ;; C-w will not double the text in the kill ring.
 141     (let (this-command)
 142       (copy-region-as-kill (mark) (point)))))
 143
 144 (defvar mouse-scroll-delay 0.25
 145   "*The pause between scroll steps caused by mouse drags, in seconds.
 146 If you drag the mouse beyond the edge of a window, Emacs scrolls the
 147 window to bring the text beyond that edge into view, with a delay of
 148 this many seconds between scroll steps.  Scrolling stops when you move
 149 the mouse back into the window, or release the button.
 150 This variable's value may be non-integral.
 151 Setting this to zero causes Emacs to scroll as fast as it can.")
 152
 153 (defun mouse-scroll-subr (jump &optional overlay start)
 154   "Scroll the selected window JUMP lines at a time, until new input arrives.
 155 If OVERLAY is an overlay, let it stretch from START to the far edge of
 156 the newly visible text.
 157 Upon exit, point is at the far edge of the newly visible text."
 158   (while (progn
 159            (goto-char (window-start))
 160            (if (not (zerop (vertical-motion jump)))
 161                (progn
 162                  (set-window-start (selected-window) (point))
 163                  (if (natnump jump)
 164                      (progn
 165                        (goto-char (window-end (selected-window)))
 166                        ;; window-end doesn't reflect the window's new
 167                        ;; start position until the next redisplay.  Hurrah.
 168                        (vertical-motion (1- jump)))
 169                    (goto-char (window-start (selected-window))))
 170                  (if overlay
 171                      (move-overlay overlay start (point)))
 172                  (if (not (eobp))
 173                      (sit-for mouse-scroll-delay))))))
 174   (point))
 175
 176 (defvar mouse-drag-overlay (make-overlay 1 1))
 177 (overlay-put mouse-drag-overlay 'face 'region)
 178
 179 (defvar mouse-selection-click-count 0)
 180
 181 (defun mouse-drag-region (start-event)
 182   "Set the region to the text that the mouse is dragged over.
 183 Highlight the drag area as you move the mouse.
 184 This must be bound to a button-down mouse event.
 185 In Transient Mark mode, the highlighting remains once you
 186 release the mouse button.  Otherwise, it does not."
 187   (interactive "e")
 188   (let* ((start-posn (event-start start-event))
 189          (start-point (posn-point start-posn))
 190          (start-window (posn-window start-posn))
 191          (start-frame (window-frame start-window))
 192          (bounds (window-edges start-window))
 193          (top (nth 1 bounds))
 194          (bottom (if (window-minibuffer-p start-window)
 195                      (nth 3 bounds)
 196                    ;; Don't count the mode line.
 197                    (1- (nth 3 bounds))))
 198          (click-count (1- (event-click-count start-event))))
 199     (setq mouse-selection-click-count click-count)
 200     (mouse-set-point start-event)
 201     (let ((range (mouse-start-end start-point start-point click-count)))
 202       (move-overlay mouse-drag-overlay (car range) (nth 1 range)
 203                     (window-buffer start-window)))
 204     (deactivate-mark)
 205     (let (event end end-point)
 206       (track-mouse
 207         (while (progn
 208                  (setq event (read-event))
 209                  (or (mouse-movement-p event)
 210                      (eq (car-safe event) 'switch-frame)))
 211           (if (eq (car-safe event) 'switch-frame)
 212               nil
 213             (setq end (event-end event)
 214                   end-point (posn-point end))
 215
 216             (cond
 217
 218              ;; Ignore switch-frame events.
 219              ((eq (car-safe event) 'switch-frame))
 220
 221              ;; Are we moving within the original window?
 222              ((and (eq (posn-window end) start-window)
 223                    (integer-or-marker-p end-point))
 224               (goto-char end-point)
 225               (let ((range (mouse-start-end start-point (point) click-count)))
 226                 (move-overlay mouse-drag-overlay (car range) (nth 1 range))))
 227
 228              ;; Are we moving on a different window on the same frame?
 229              ((and (windowp (posn-window end))
 230                    (eq (window-frame (posn-window end)) start-frame))
 231               (let ((mouse-row
 232                      (+ (nth 1 (window-edges (posn-window end)))
 233                         (cdr (posn-col-row end)))))
 234                 (cond
 235                  ((< mouse-row top)
 236                   (mouse-scroll-subr
 237                    (- mouse-row top) mouse-drag-overlay start-point))
 238                  ((and (not (eobp))
 239                        (>= mouse-row bottom))
 240                   (mouse-scroll-subr (1+ (- mouse-row bottom))
 241                                      mouse-drag-overlay start-point)))))
 242
 243              (t
 244               (let ((mouse-y (cdr (cdr (mouse-position))))
 245                     (menu-bar-lines (or (cdr (assq 'menu-bar-lines
 246                                                    (frame-parameters)))
 247                                         0)))
 248
 249                 ;; Are we on the menu bar?
 250                 (and (integerp mouse-y) (< mouse-y menu-bar-lines)
 251                      (mouse-scroll-subr (- mouse-y menu-bar-lines)
 252                                         mouse-drag-overlay start-point))))))))
 253
 254       (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 255                (eq (posn-window (event-end event)) start-window)
 256                (numberp (posn-point (event-end event))))
 257           (let ((fun (key-binding (vector (car event)))))
 258             (if (memq fun '(mouse-set-region mouse-set-point))
 259                 (if (not (= (overlay-start mouse-drag-overlay)
 260                             (overlay-end mouse-drag-overlay)))
 261                     (let (this-command)
 262                       (push-mark (overlay-start mouse-drag-overlay) t t)
 263                       (goto-char (overlay-end mouse-drag-overlay))
 264                       (copy-region-as-kill (point) (mark t)))
 265                   (goto-char (overlay-end mouse-drag-overlay))
 266                   (setq this-command 'mouse-set-point))
 267               (if (fboundp fun)
 268                   (funcall fun event)))))
 269       (delete-overlay mouse-drag-overlay))))
 270 \f
 271 ;; Commands to handle xterm-style multiple clicks.
 272
 273 (defun mouse-skip-word (dir)
 274   "Skip over word, over whitespace, or over identical punctuation.
 275 If DIR is positive skip forward; if negative, skip backward."
 276   (let* ((char (following-char))
 277          (syntax (char-to-string (char-syntax char))))
 278     (if (or (string= syntax "w") (string= syntax " "))
 279         (if (< dir 0)
 280             (skip-syntax-backward syntax)
 281           (skip-syntax-forward syntax))
 282       (if (< dir 0)
 283           (while (and (not (bobp)) (= (preceding-char) char))
 284             (forward-char -1))
 285         (while (and (not (eobp)) (= (following-char) char))
 286           (forward-char 1))))))
 287
 288 ;; Return a list of region bounds based on START and END according to MODE.
 289 ;; If MODE is 0 then set point to (min START END), mark to (max START END).
 290 ;; If MODE is 1 then set point to start of word at (min START END),
 291 ;; mark to end of word at (max START END).
 292 ;; If MODE is 2 then do the same for lines.
 293 (defun mouse-start-end (start end mode)
 294   (if (> start end)
 295       (let ((temp start))
 296         (setq start end
 297               end temp)))
 298   (setq mode (mod mode 3))
 299   (cond ((= mode 0)
 300          (list start end))
 301         ((and (= mode 1)
 302               (= start end)
 303               (char-after start)
 304               (= (char-syntax (char-after start)) ?\())
 305          (list start
 306                (save-excursion
 307                  (goto-char start)
 308                  (forward-sexp 1)
 309                  (point))))
 310         ((and (= mode 1)
 311               (= start end)
 312               (char-after start)
 313               (= (char-syntax (char-after start)) ?\)))
 314          (list (save-excursion
 315                  (goto-char (1+ start))
 316                  (backward-sexp 1)
 317                  (point))
 318                (1+ start)))
 319         ((= mode 1)
 320          (list (save-excursion
 321                  (goto-char start)
 322                  (mouse-skip-word -1)
 323                  (point))
 324                (save-excursion
 325                  (goto-char end)
 326                  (mouse-skip-word 1)
 327                  (point))))
 328         ((= mode 2)
 329          (list (save-excursion
 330                  (goto-char start)
 331                  (beginning-of-line 1)
 332                  (point))
 333                (save-excursion
 334                  (goto-char end)
 335                  (forward-line 1)
 336                  (point))))))
 337 \f
 338 ;; Subroutine: set the mark where CLICK happened,
 339 ;; but don't do anything else.
 340 (defun mouse-set-mark-fast (click)
 341   (let ((posn (event-start click)))
 342     (select-window (posn-window posn))
 343     (if (numberp (posn-point posn))
 344         (push-mark (posn-point posn) t t))))
 345
 346 ;; Momentarily show where the mark is, if highlighting doesn't show it.
 347 (defun mouse-show-mark ()
 348   (or transient-mark-mode
 349       (save-excursion
 350         (goto-char (mark t))
 351         (sit-for 1))))
 352
 353 (defun mouse-set-mark (click)
 354   "Set mark at the position clicked on with the mouse.
 355 Display cursor at that position for a second.
 356 This must be bound to a mouse click."
 357   (interactive "e")
 358   (let ((point-save (point)))
 359     (unwind-protect
 360         (progn (mouse-set-point click)
 361                (push-mark nil t t)
 362                (or transient-mark-mode
 363                    (sit-for 1)))
 364       (goto-char point-save))))
 365
 366 (defun mouse-kill (click)
 367   "Kill the region between point and the mouse click.
 368 The text is saved in the kill ring, as with \\[kill-region]."
 369   (interactive "e")
 370   (let ((click-posn (posn-point (event-start click))))
 371     (if (numberp click-posn)
 372         (kill-region (min (point) click-posn)
 373                      (max (point) click-posn)))))
 374
 375 (defun mouse-yank-at-click (click arg)
 376   "Insert the last stretch of killed text at the position clicked on.
 377 Also move point to one end of the text thus inserted (normally the end).
 378 Prefix arguments are interpreted as with \\[yank].
 379 If `mouse-yank-at-point' is non-nil, insert at point
 380 regardless of where you click."
 381   (interactive "e\nP")
 382   (or mouse-yank-at-point (mouse-set-point click))
 383   (setq this-command 'yank)
 384   (yank arg))
 385
 386 (defun mouse-kill-ring-save (click)
 387   "Copy the region between point and the mouse click in the kill ring.
 388 This does not delete the region; it acts like \\[kill-ring-save]."
 389   (interactive "e")
 390   (mouse-set-mark-fast click)
 391   (kill-ring-save (point) (mark t))
 392   (mouse-show-mark))
 393
 394 ;;; This function used to delete the text between point and the mouse
 395 ;;; whenever it was equal to the front of the kill ring, but some
 396 ;;; people found that confusing.
 397
 398 ;;; A list (TEXT START END), describing the text and position of the last
 399 ;;; invocation of mouse-save-then-kill.
 400 (defvar mouse-save-then-kill-posn nil)
 401
 402 (defun mouse-save-then-kill-delete-region (beg end)
 403   ;; We must make our own undo boundaries
 404   ;; because they happen automatically only for the current buffer.
 405   (undo-boundary)
 406   (if (or (= beg end) (eq buffer-undo-list t))
 407       ;; If we have no undo list in this buffer,
 408       ;; just delete.
 409       (delete-region beg end)
 410     ;; Delete, but make the undo-list entry share with the kill ring.
 411     ;; First, delete just one char, so in case buffer is being modified
 412     ;; for the first time, the undo list records that fact.
 413     (delete-region beg
 414                    (+ beg (if (> end beg) 1 -1)))
 415     (let ((buffer-undo-list buffer-undo-list))
 416       ;; Undo that deletion--but don't change the undo list!
 417       (primitive-undo 1 buffer-undo-list)
 418       ;; Now delete the rest of the specified region,
 419       ;; but don't record it.
 420       (setq buffer-undo-list t)
 421       (if (/= (length (car kill-ring)) (- (max end beg) (min end beg)))
 422           (error "Lossage in mouse-save-then-kill-delete-region"))
 423       (delete-region beg end))
 424     (let ((tail buffer-undo-list))
 425       ;; Search back in buffer-undo-list for the string
 426       ;; that came from deleting one character.
 427       (while (and tail (not (stringp (car (car tail)))))
 428         (setq tail (cdr tail)))
 429       ;; Replace it with an entry for the entire deleted text.
 430       (and tail
 431            (setcar tail (cons (car kill-ring) (min beg end))))))
 432   (undo-boundary))
 433
 434 (defun mouse-save-then-kill (click)
 435   "Save text to point in kill ring; the second time, kill the text.
 436 If the text between point and the mouse is the same as what's
 437 at the front of the kill ring, this deletes the text.
 438 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 439 which prepares for a second click to delete the text.
 440
 441 If you have selected words or lines, this command extends the
 442 selection through the word or line clicked on.  If you do this
 443 again in a different position, it extends the selection again.
 444 If you do this twice in the same position, the selection is killed."
 445   (interactive "e")
 446   (let ((click-posn (posn-point (event-start click)))
 447         ;; Don't let a subsequent kill command append to this one:
 448         ;; prevent setting this-command to kill-region.
 449         (this-command this-command))
 450     (if (> (mod mouse-selection-click-count 3) 0)
 451         (if (not (and (eq last-command 'mouse-save-then-kill)
 452                       (equal click-posn
 453                              (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 454             ;; Find both ends of the object selected by this click.
 455             (let* ((range
 456                     (mouse-start-end click-posn click-posn
 457                                      mouse-selection-click-count)))
 458               ;; Move whichever end is closer to the click.
 459               ;; That's what xterm does, and it seems reasonable.
 460               (if (< (abs (- click-posn (mark t)))
 461                      (abs (- click-posn (point))))
 462                   (set-mark (car range))
 463                 (goto-char (nth 1 range)))
 464               ;; We have already put the old region in the kill ring.
 465               ;; Replace it with the extended region.
 466               ;; (It would be annoying to make a separate entry.)
 467               (setcar kill-ring (buffer-substring (point) (mark t)))
 468               (if interprogram-cut-function
 469                   (funcall interprogram-cut-function (car kill-ring)))
 470               ;; Arrange for a repeated mouse-3 to kill this region.
 471               (setq mouse-save-then-kill-posn
 472                     (list (car kill-ring) (point) click-posn))
 473               (mouse-show-mark))
 474           ;; If we click this button again without moving it,
 475           ;; that time kill.
 476           (mouse-save-then-kill-delete-region (point) (mark))
 477           (setq mouse-selection-click-count 0)
 478           (setq mouse-save-then-kill-posn nil))
 479       (if (and (eq last-command 'mouse-save-then-kill)
 480                mouse-save-then-kill-posn
 481                (eq (car mouse-save-then-kill-posn) (car kill-ring))
 482                (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 483           ;; If this is the second time we've called
 484           ;; mouse-save-then-kill, delete the text from the buffer.
 485           (progn
 486             (mouse-save-then-kill-delete-region (point) (mark))
 487             ;; After we kill, another click counts as "the first time".
 488             (setq mouse-save-then-kill-posn nil))
 489         (if (or (and (eq last-command 'mouse-save-then-kill)
 490                      mouse-save-then-kill-posn)
 491                 (and mark-active transient-mark-mode)
 492                 (and (eq last-command 'mouse-drag-region)
 493                      (or mark-even-if-inactive
 494                          (not transient-mark-mode))))
 495             ;; We have a selection or suitable region, so adjust it.
 496             (let* ((posn (event-start click))
 497                    (new (posn-point posn)))
 498               (select-window (posn-window posn))
 499               (if (numberp new)
 500                   (progn
 501                     ;; Move whichever end of the region is closer to the click.
 502                     ;; That is what xterm does, and it seems reasonable.
 503                     (if (< (abs (- new (point))) (abs (- new (mark t))))
 504                         (goto-char new)
 505                       (set-mark new))
 506                     (setq deactivate-mark nil)))
 507               (setcar kill-ring (buffer-substring (point) (mark t)))
 508               (if interprogram-cut-function
 509                   (funcall interprogram-cut-function (car kill-ring))))
 510           ;; We just have point, so set mark here.
 511           (mouse-set-mark-fast click)
 512           (kill-ring-save (point) (mark t))
 513           (mouse-show-mark))
 514         (setq mouse-save-then-kill-posn
 515               (list (car kill-ring) (point) click-posn))))))
 516 \f
 517 (global-set-key [M-mouse-1] 'mouse-start-secondary)
 518 (global-set-key [M-drag-mouse-1] 'mouse-set-secondary)
 519 (global-set-key [M-down-mouse-1] 'mouse-drag-secondary)
 520 (global-set-key [M-mouse-3] 'mouse-secondary-save-then-kill)
 521 (global-set-key [M-mouse-2] 'mouse-yank-secondary)
 522
 523 ;; An overlay which records the current secondary selection
 524 ;; or else is deleted when there is no secondary selection.
 525 ;; May be nil.
 526 (defvar mouse-secondary-overlay nil)
 527
 528 ;; A marker which records the specified first end for a secondary selection.
 529 ;; May be nil.
 530 (defvar mouse-secondary-start nil)
 531
 532 (defun mouse-start-secondary (click)
 533   "Set one end of the secondary selection to the position clicked on.
 534 Use \\[mouse-secondary-save-then-kill] to set the other end
 535 and complete the secondary selection."
 536   (interactive "e")
 537   (let ((posn (event-start click)))
 538     (save-excursion
 539       (set-buffer (window-buffer (posn-window posn)))
 540       ;; Cancel any preexisting secondary selection.
 541       (if mouse-secondary-overlay
 542           (delete-overlay mouse-secondary-overlay))
 543       (if (numberp (posn-point posn))
 544           (progn
 545             (or mouse-secondary-start
 546                 (setq mouse-secondary-start (make-marker)))
 547             (move-marker mouse-secondary-start (posn-point posn)))))))
 548
 549 (defun mouse-set-secondary (click)
 550   "Set the secondary selection to the text that the mouse is dragged over.
 551 This must be bound to a mouse drag event."
 552   (interactive "e")
 553   (let ((posn (event-start click))
 554         beg
 555         (end (event-end click)))
 556     (save-excursion
 557       (set-buffer (window-buffer (posn-window posn)))
 558       (if (numberp (posn-point posn))
 559           (setq beg (posn-point posn)))
 560       (if mouse-secondary-overlay
 561           (move-overlay mouse-secondary-overlay beg (posn-point end))
 562         (setq mouse-secondary-overlay (make-overlay beg (posn-point end))))
 563       (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 564
 565 (defun mouse-drag-secondary (start-event)
 566   "Set the secondary selection to the text that the mouse is dragged over.
 567 Highlight the drag area as you move the mouse.
 568 This must be bound to a button-down mouse event."
 569   (interactive "e")
 570   (let* ((start-posn (event-start start-event))
 571          (start-point (posn-point start-posn))
 572          (start-window (posn-window start-posn))
 573          (start-frame (window-frame start-window))
 574          (bounds (window-edges start-window))
 575          (top (nth 1 bounds))
 576          (bottom (if (window-minibuffer-p start-window)
 577                      (nth 3 bounds)
 578                    ;; Don't count the mode line.
 579                    (1- (nth 3 bounds))))
 580          (click-count (1- (event-click-count start-event))))
 581     (save-excursion
 582       (set-buffer (window-buffer start-window))
 583       (setq mouse-selection-click-count click-count)
 584       (or mouse-secondary-overlay
 585           (setq mouse-secondary-overlay
 586                 (make-overlay (point) (point))))
 587       (overlay-put mouse-secondary-overlay 'face 'secondary-selection)
 588       (if (> (mod click-count 3) 0)
 589           ;; Double or triple press: make an initial selection
 590           ;; of one word or line.
 591           (let ((range (mouse-start-end start-point start-point click-count)))
 592             (set-marker mouse-secondary-start nil)
 593             (move-overlay mouse-secondary-overlay 1 1
 594                           (window-buffer start-window))
 595             (move-overlay mouse-secondary-overlay (car range) (nth 1 range)
 596                           (window-buffer start-window)))
 597         ;; Single-press: cancel any preexisting secondary selection.
 598         (or mouse-secondary-start
 599             (setq mouse-secondary-start (make-marker)))
 600         (set-marker mouse-secondary-start start-point)
 601         (delete-overlay mouse-secondary-overlay))
 602       (let (event end end-point)
 603         (track-mouse
 604           (while (progn
 605                    (setq event (read-event))
 606                    (or (mouse-movement-p event)
 607                        (eq (car-safe event) 'switch-frame)))
 608
 609             (if (eq (car-safe event) 'switch-frame)
 610                 nil
 611               (setq end (event-end event)
 612                     end-point (posn-point end))
 613               (cond
 614
 615                ;; Ignore switch-frame events.
 616                ((eq (car-safe event) 'switch-frame))
 617
 618                ;; Are we moving within the original window?
 619                ((and (eq (posn-window end) start-window)
 620                      (integer-or-marker-p end-point))
 621                 (if (/= start-point end-point)
 622                     (set-marker mouse-secondary-start nil))
 623                 (let ((range (mouse-start-end start-point end-point
 624                                               click-count)))
 625                   (move-overlay mouse-secondary-overlay
 626                                 (car range) (nth 1 range))))
 627
 628                ;; Are we moving on a different window on the same frame?
 629                ((and (windowp (posn-window end))
 630                      (eq (window-frame (posn-window end)) start-frame))
 631                 (let ((mouse-row
 632                        (+ (nth 1 (window-edges (posn-window end)))
 633                           (cdr (posn-col-row end)))))
 634                   (cond
 635                    ((< mouse-row top)
 636                     (mouse-scroll-subr
 637                      (- mouse-row top) mouse-secondary-overlay start-point))
 638                    ((and (not (eobp))
 639                          (>= mouse-row bottom))
 640                     (mouse-scroll-subr (1+ (- mouse-row bottom))
 641                                        mouse-drag-overlay start-point)))))
 642
 643                (t
 644                 (let ((mouse-y (cdr (cdr (mouse-position))))
 645                       (menu-bar-lines (or (cdr (assq 'menu-bar-lines
 646                                                      (frame-parameters)))
 647                                           0)))
 648
 649                   ;; Are we on the menu bar?
 650                   (and (integerp mouse-y) (< mouse-y menu-bar-lines)
 651                        (mouse-scroll-subr (- mouse-y menu-bar-lines)
 652                                           mouse-secondary-overlay start-point))))))))
 653
 654         (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 655                  (eq (posn-window (event-end event)) start-window)
 656                  (numberp (posn-point (event-end event))))
 657             (if (marker-position mouse-secondary-start)
 658                 (save-window-excursion
 659                   (delete-overlay mouse-secondary-overlay)
 660                   (x-set-selection 'SECONDARY nil)
 661                   (select-window start-window)
 662                   (save-excursion
 663                     (goto-char mouse-secondary-start)
 664                     (sit-for 1)))
 665               (x-set-selection
 666                'SECONDARY
 667                (buffer-substring (overlay-start mouse-secondary-overlay)
 668                                  (overlay-end mouse-secondary-overlay)))))))))
 669
 670 (defun mouse-yank-secondary (click)
 671   "Insert the secondary selection at the position clicked on.
 672 Move point to the end of the inserted text.
 673 If `mouse-yank-at-point' is non-nil, insert at point
 674 regardless of where you click."
 675   (interactive "e")
 676   (or mouse-yank-at-point (mouse-set-point click))
 677   (insert (x-get-selection 'SECONDARY)))
 678
 679 (defun mouse-kill-secondary ()
 680   "Kill the text in the secondary selection.
 681 This is intended more as a keyboard command than as a mouse command
 682 but it can work as either one.
 683
 684 The current buffer (in case of keyboard use), or the buffer clicked on,
 685 must be the one that the secondary selection is in.  This requirement
 686 is to prevent accidents."
 687   (interactive)
 688   (let* ((keys (this-command-keys))
 689          (click (elt keys (1- (length keys)))))
 690     (or (eq (overlay-buffer mouse-secondary-overlay)
 691             (if (listp click)
 692                 (window-buffer (posn-window (event-start click)))
 693               (current-buffer)))
 694         (error "Select or click on the buffer where the secondary selection is")))
 695   (save-excursion
 696     (set-buffer (overlay-buffer mouse-secondary-overlay))
 697     (kill-region (overlay-start mouse-secondary-overlay)
 698                  (overlay-end mouse-secondary-overlay)))
 699   (delete-overlay mouse-secondary-overlay)
 700   (x-set-selection 'SECONDARY nil)
 701   (setq mouse-secondary-overlay nil))
 702
 703 (defun mouse-secondary-save-then-kill (click)
 704   "Save text to point in kill ring; the second time, kill the text.
 705 If the text between point and the mouse is the same as what's
 706 at the front of the kill ring, this deletes the text.
 707 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 708 which prepares for a second click to delete the text.
 709
 710 If you have selected words or lines, this command extends the
 711 selection through the word or line clicked on.  If you do this
 712 again in a different position, it extends the selection again.
 713 If you do this twice in the same position, the selection is killed."
 714   (interactive "e")
 715   (let ((posn (event-start click))
 716         (click-posn (posn-point (event-start click)))
 717         ;; Don't let a subsequent kill command append to this one:
 718         ;; prevent setting this-command to kill-region.
 719         (this-command this-command))
 720     (or (eq (window-buffer (posn-window posn))
 721             (or (and mouse-secondary-overlay
 722                      (overlay-buffer mouse-secondary-overlay))
 723                 (if mouse-secondary-start
 724                     (marker-buffer mouse-secondary-start))))
 725         (error "Wrong buffer"))
 726     (save-excursion
 727       (set-buffer (window-buffer (posn-window posn)))
 728       (if (> (mod mouse-selection-click-count 3) 0)
 729           (if (not (and (eq last-command 'mouse-secondary-save-then-kill)
 730                         (equal click-posn
 731                                (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 732               ;; Find both ends of the object selected by this click.
 733               (let* ((range
 734                       (mouse-start-end click-posn click-posn
 735                                        mouse-selection-click-count)))
 736                 ;; Move whichever end is closer to the click.
 737                 ;; That's what xterm does, and it seems reasonable.
 738                 (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 739                        (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 740                     (move-overlay mouse-secondary-overlay (car range)
 741                                   (overlay-end mouse-secondary-overlay))
 742                   (move-overlay mouse-secondary-overlay
 743                                 (overlay-start mouse-secondary-overlay)
 744                                 (nth 1 range)))
 745                 ;; We have already put the old region in the kill ring.
 746                 ;; Replace it with the extended region.
 747                 ;; (It would be annoying to make a separate entry.)
 748                 (setcar kill-ring (buffer-substring
 749                                    (overlay-start mouse-secondary-overlay)
 750                                    (overlay-end mouse-secondary-overlay)))
 751                 (if interprogram-cut-function
 752                     (funcall interprogram-cut-function (car kill-ring)))
 753                 ;; Arrange for a repeated mouse-3 to kill this region.
 754                 (setq mouse-save-then-kill-posn
 755                       (list (car kill-ring) (point) click-posn)))
 756             ;; If we click this button again without moving it,
 757             ;; that time kill.
 758             (progn
 759               (mouse-save-then-kill-delete-region
 760                (overlay-start mouse-secondary-overlay)
 761                (overlay-end mouse-secondary-overlay))
 762               (setq mouse-save-then-kill-posn nil)
 763               (setq mouse-selection-click-count 0)
 764               (delete-overlay mouse-secondary-overlay)))
 765         (if (and (eq last-command 'mouse-secondary-save-then-kill)
 766                  mouse-save-then-kill-posn
 767                  (eq (car mouse-save-then-kill-posn) (car kill-ring))
 768                  (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 769             ;; If this is the second time we've called
 770             ;; mouse-secondary-save-then-kill, delete the text from the buffer.
 771             (progn
 772               (mouse-save-then-kill-delete-region
 773                (overlay-start mouse-secondary-overlay)
 774                (overlay-end mouse-secondary-overlay))
 775               (setq mouse-save-then-kill-posn nil)
 776               (delete-overlay mouse-secondary-overlay))
 777           (if (overlay-start mouse-secondary-overlay)
 778               ;; We have a selection, so adjust it.
 779               (progn
 780                 (if (numberp click-posn)
 781                     (progn
 782                       ;; Move whichever end of the region is closer to the click.
 783                       ;; That is what xterm does, and it seems reasonable.
 784                       (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 785                              (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 786                           (move-overlay mouse-secondary-overlay click-posn
 787                                         (overlay-end mouse-secondary-overlay))
 788                         (move-overlay mouse-secondary-overlay
 789                                       (overlay-start mouse-secondary-overlay)
 790                                       click-posn))
 791                       (setq deactivate-mark nil)))
 792                 (setcar kill-ring (buffer-substring
 793                                    (overlay-start mouse-secondary-overlay)
 794                                    (overlay-end mouse-secondary-overlay)))
 795                 (if interprogram-cut-function
 796                     (funcall interprogram-cut-function (car kill-ring))))
 797             (if mouse-secondary-start
 798                 ;; All we have is one end of a selection,
 799                 ;; so put the other end here.
 800                 (let ((start (+ 0 mouse-secondary-start)))
 801                   (kill-ring-save start click-posn)
 802                   (if mouse-secondary-overlay
 803                       (move-overlay mouse-secondary-overlay start click-posn)
 804                     (setq mouse-secondary-overlay (make-overlay start click-posn)))
 805                   (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 806           (setq mouse-save-then-kill-posn
 807                 (list (car kill-ring) (point) click-posn))))
 808       (x-set-selection 'SECONDARY
 809                        (if (overlay-buffer mouse-secondary-overlay)
 810                            (buffer-substring
 811                             (overlay-start mouse-secondary-overlay)
 812                             (overlay-end mouse-secondary-overlay)))))))
 813 \f
 814 (defun mouse-buffer-menu (event)
 815   "Pop up a menu of buffers for selection with the mouse.
 816 This switches buffers in the window that you clicked on,
 817 and selects that window."
 818   (interactive "e")
 819   (let ((menu
 820          (list "Buffer Menu"
 821                (cons "Select Buffer"
 822                      (let ((tail (buffer-list))
 823                            (maxbuf 0)
 824                            head)
 825                        (while tail
 826                          (or (eq ?\ (aref (buffer-name (car tail)) 0))
 827                              (setq maxbuf
 828                                    (max maxbuf
 829                                         (length (buffer-name (car tail))))))
 830                          (setq tail (cdr tail)))
 831                        (setq tail (buffer-list))
 832                        (while tail
 833                          (let ((elt (car tail)))
 834                            (if (not (string-match "^ "
 835                                                   (buffer-name elt)))
 836                                (setq head (cons
 837                                            (cons
 838                                             (format
 839                                              (format "%%%ds  %%s%%s  %%s"
 840                                                      maxbuf)
 841                                              (buffer-name elt)
 842                                              (if (buffer-modified-p elt)
 843                                                  "*" " ")
 844                                              (save-excursion
 845                                                (set-buffer elt)
 846                                                (if buffer-read-only "%" " "))
 847                                              (or (buffer-file-name elt) ""))
 848                                             elt)
 849                                            head))))
 850                          (setq tail (cdr tail)))
 851                        (reverse head))))))
 852     (let ((buf (x-popup-menu event menu))
 853           (window (posn-window (event-start event))))
 854       (if buf
 855           (progn
 856             (or (framep window) (select-window window))
 857             (switch-to-buffer buf))))))
 858 \f
 859 ;;; These need to be rewritten for the new scroll bar implementation.
 860
 861 ;;;!! ;; Commands for the scroll bar.
 862 ;;;!!
 863 ;;;!! (defun mouse-scroll-down (click)
 864 ;;;!!   (interactive "@e")
 865 ;;;!!   (scroll-down (1+ (cdr (mouse-coords click)))))
 866 ;;;!!
 867 ;;;!! (defun mouse-scroll-up (click)
 868 ;;;!!   (interactive "@e")
 869 ;;;!!   (scroll-up (1+ (cdr (mouse-coords click)))))
 870 ;;;!!
 871 ;;;!! (defun mouse-scroll-down-full ()
 872 ;;;!!   (interactive "@")
 873 ;;;!!   (scroll-down nil))
 874 ;;;!!
 875 ;;;!! (defun mouse-scroll-up-full ()
 876 ;;;!!   (interactive "@")
 877 ;;;!!   (scroll-up nil))
 878 ;;;!!
 879 ;;;!! (defun mouse-scroll-move-cursor (click)
 880 ;;;!!   (interactive "@e")
 881 ;;;!!   (move-to-window-line (1+ (cdr (mouse-coords click)))))
 882 ;;;!!
 883 ;;;!! (defun mouse-scroll-absolute (event)
 884 ;;;!!   (interactive "@e")
 885 ;;;!!   (let* ((pos (car event))
 886 ;;;!!    (position (car pos))
 887 ;;;!!    (length (car (cdr pos))))
 888 ;;;!!     (if (<= length 0) (setq length 1))
 889 ;;;!!     (let* ((scale-factor (max 1 (/ length (/ 8000000 (buffer-size)))))
 890 ;;;!!      (newpos (* (/ (* (/ (buffer-size) scale-factor)
 891 ;;;!!                       position)
 892 ;;;!!                    length)
 893 ;;;!!                 scale-factor)))
 894 ;;;!!       (goto-char newpos)
 895 ;;;!!       (recenter '(4)))))
 896 ;;;!!
 897 ;;;!! (defun mouse-scroll-left (click)
 898 ;;;!!   (interactive "@e")
 899 ;;;!!   (scroll-left (1+ (car (mouse-coords click)))))
 900 ;;;!!
 901 ;;;!! (defun mouse-scroll-right (click)
 902 ;;;!!   (interactive "@e")
 903 ;;;!!   (scroll-right (1+ (car (mouse-coords click)))))
 904 ;;;!!
 905 ;;;!! (defun mouse-scroll-left-full ()
 906 ;;;!!   (interactive "@")
 907 ;;;!!   (scroll-left nil))
 908 ;;;!!
 909 ;;;!! (defun mouse-scroll-right-full ()
 910 ;;;!!   (interactive "@")
 911 ;;;!!   (scroll-right nil))
 912 ;;;!!
 913 ;;;!! (defun mouse-scroll-move-cursor-horizontally (click)
 914 ;;;!!   (interactive "@e")
 915 ;;;!!   (move-to-column (1+ (car (mouse-coords click)))))
 916 ;;;!!
 917 ;;;!! (defun mouse-scroll-absolute-horizontally (event)
 918 ;;;!!   (interactive "@e")
 919 ;;;!!   (let* ((pos (car event))
 920 ;;;!!    (position (car pos))
 921 ;;;!!    (length (car (cdr pos))))
 922 ;;;!!   (set-window-hscroll (selected-window) 33)))
 923 ;;;!!
 924 ;;;!! (global-set-key [scroll-bar mouse-1] 'mouse-scroll-up)
 925 ;;;!! (global-set-key [scroll-bar mouse-2] 'mouse-scroll-absolute)
 926 ;;;!! (global-set-key [scroll-bar mouse-3] 'mouse-scroll-down)
 927 ;;;!!
 928 ;;;!! (global-set-key [vertical-slider mouse-1] 'mouse-scroll-move-cursor)
 929 ;;;!! (global-set-key [vertical-slider mouse-2] 'mouse-scroll-move-cursor)
 930 ;;;!! (global-set-key [vertical-slider mouse-3] 'mouse-scroll-move-cursor)
 931 ;;;!!
 932 ;;;!! (global-set-key [thumbup mouse-1] 'mouse-scroll-up-full)
 933 ;;;!! (global-set-key [thumbup mouse-2] 'mouse-scroll-up-full)
 934 ;;;!! (global-set-key [thumbup mouse-3] 'mouse-scroll-up-full)
 935 ;;;!!
 936 ;;;!! (global-set-key [thumbdown mouse-1] 'mouse-scroll-down-full)
 937 ;;;!! (global-set-key [thumbdown mouse-2] 'mouse-scroll-down-full)
 938 ;;;!! (global-set-key [thumbdown mouse-3] 'mouse-scroll-down-full)
 939 ;;;!!
 940 ;;;!! (global-set-key [horizontal-scroll-bar mouse-1] 'mouse-scroll-left)
 941 ;;;!! (global-set-key [horizontal-scroll-bar mouse-2]
 942 ;;;!!           'mouse-scroll-absolute-horizontally)
 943 ;;;!! (global-set-key [horizontal-scroll-bar mouse-3] 'mouse-scroll-right)
 944 ;;;!!
 945 ;;;!! (global-set-key [horizontal-slider mouse-1]
 946 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 947 ;;;!! (global-set-key [horizontal-slider mouse-2]
 948 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 949 ;;;!! (global-set-key [horizontal-slider mouse-3]
 950 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 951 ;;;!!
 952 ;;;!! (global-set-key [thumbleft mouse-1] 'mouse-scroll-left-full)
 953 ;;;!! (global-set-key [thumbleft mouse-2] 'mouse-scroll-left-full)
 954 ;;;!! (global-set-key [thumbleft mouse-3] 'mouse-scroll-left-full)
 955 ;;;!!
 956 ;;;!! (global-set-key [thumbright mouse-1] 'mouse-scroll-right-full)
 957 ;;;!! (global-set-key [thumbright mouse-2] 'mouse-scroll-right-full)
 958 ;;;!! (global-set-key [thumbright mouse-3] 'mouse-scroll-right-full)
 959 ;;;!!
 960 ;;;!! (global-set-key [horizontal-scroll-bar S-mouse-2]
 961 ;;;!!           'mouse-split-window-horizontally)
 962 ;;;!! (global-set-key [mode-line S-mouse-2]
 963 ;;;!!           'mouse-split-window-horizontally)
 964 ;;;!! (global-set-key [vertical-scroll-bar S-mouse-2]
 965 ;;;!!           'mouse-split-window)
 966 \f
 967 ;;;!! ;;;;
 968 ;;;!! ;;;; Here are experimental things being tested.  Mouse events
 969 ;;;!! ;;;; are of the form:
 970 ;;;!! ;;;;      ((x y) window screen-part key-sequence timestamp)
 971 ;;;!! ;;
 972 ;;;!! ;;;;
 973 ;;;!! ;;;; Dynamically track mouse coordinates
 974 ;;;!! ;;;;
 975 ;;;!! ;;
 976 ;;;!! ;;(defun track-mouse (event)
 977 ;;;!! ;;  "Track the coordinates, absolute and relative, of the mouse."
 978 ;;;!! ;;  (interactive "@e")
 979 ;;;!! ;;  (while mouse-grabbed
 980 ;;;!! ;;    (let* ((pos (read-mouse-position (selected-screen)))
 981 ;;;!! ;;           (abs-x (car pos))
 982 ;;;!! ;;           (abs-y (cdr pos))
 983 ;;;!! ;;           (relative-coordinate (coordinates-in-window-p
 984 ;;;!! ;;                                 (list (car pos) (cdr pos))
 985 ;;;!! ;;                                 (selected-window))))
 986 ;;;!! ;;      (if (consp relative-coordinate)
 987 ;;;!! ;;          (message "mouse: [%d %d], (%d %d)" abs-x abs-y
 988 ;;;!! ;;                   (car relative-coordinate)
 989 ;;;!! ;;                   (car (cdr relative-coordinate)))
 990 ;;;!! ;;        (message "mouse: [%d %d]" abs-x abs-y)))))
 991 ;;;!!
 992 ;;;!! ;;
 993 ;;;!! ;; Dynamically put a box around the line indicated by point
 994 ;;;!! ;;
 995 ;;;!! ;;
 996 ;;;!! ;;(require 'backquote)
 997 ;;;!! ;;
 998 ;;;!! ;;(defun mouse-select-buffer-line (event)
 999 ;;;!! ;;  (interactive "@e")
1000 ;;;!! ;;  (let ((relative-coordinate
1001 ;;;!! ;;         (coordinates-in-window-p (car event) (selected-window)))
1002 ;;;!! ;;        (abs-y (car (cdr (car event)))))
1003 ;;;!! ;;    (if (consp relative-coordinate)
1004 ;;;!! ;;        (progn
1005 ;;;!! ;;          (save-excursion
1006 ;;;!! ;;            (move-to-window-line (car (cdr relative-coordinate)))
1007 ;;;!! ;;            (x-draw-rectangle
1008 ;;;!! ;;             (selected-screen)
1009 ;;;!! ;;             abs-y 0
1010 ;;;!! ;;             (save-excursion
1011 ;;;!! ;;                 (move-to-window-line (car (cdr relative-coordinate)))
1012 ;;;!! ;;                 (end-of-line)
1013 ;;;!! ;;                 (push-mark nil t)
1014 ;;;!! ;;                 (beginning-of-line)
1015 ;;;!! ;;                 (- (region-end) (region-beginning))) 1))
1016 ;;;!! ;;          (sit-for 1)
1017 ;;;!! ;;          (x-erase-rectangle (selected-screen))))))
1018 ;;;!! ;;
1019 ;;;!! ;;(defvar last-line-drawn nil)
1020 ;;;!! ;;(defvar begin-delim "[^ \t]")
1021 ;;;!! ;;(defvar end-delim   "[^ \t]")
1022 ;;;!! ;;
1023 ;;;!! ;;(defun mouse-boxing (event)
1024 ;;;!! ;;  (interactive "@e")
1025 ;;;!! ;;  (save-excursion
1026 ;;;!! ;;    (let ((screen (selected-screen)))
1027 ;;;!! ;;      (while (= (x-mouse-events) 0)
1028 ;;;!! ;;        (let* ((pos (read-mouse-position screen))
1029 ;;;!! ;;               (abs-x (car pos))
1030 ;;;!! ;;               (abs-y (cdr pos))
1031 ;;;!! ;;               (relative-coordinate
1032 ;;;!! ;;                (coordinates-in-window-p (` ((, abs-x) (, abs-y)))
1033 ;;;!! ;;                                         (selected-window)))
1034 ;;;!! ;;               (begin-reg nil)
1035 ;;;!! ;;               (end-reg nil)
1036 ;;;!! ;;               (end-column nil)
1037 ;;;!! ;;               (begin-column nil))
1038 ;;;!! ;;          (if (and (consp relative-coordinate)
1039 ;;;!! ;;                   (or (not last-line-drawn)
1040 ;;;!! ;;                       (not (= last-line-drawn abs-y))))
1041 ;;;!! ;;              (progn
1042 ;;;!! ;;                (move-to-window-line (car (cdr relative-coordinate)))
1043 ;;;!! ;;                (if (= (following-char) 10)
1044 ;;;!! ;;                    ()
1045 ;;;!! ;;                  (progn
1046 ;;;!! ;;                    (setq begin-reg (1- (re-search-forward end-delim)))
1047 ;;;!! ;;                    (setq begin-column (1- (current-column)))
1048 ;;;!! ;;                    (end-of-line)
1049 ;;;!! ;;                    (setq end-reg (1+ (re-search-backward begin-delim)))
1050 ;;;!! ;;                    (setq end-column (1+ (current-column)))
1051 ;;;!! ;;                    (message "%s" (buffer-substring begin-reg end-reg))
1052 ;;;!! ;;                    (x-draw-rectangle screen
1053 ;;;!! ;;                                      (setq last-line-drawn abs-y)
1054 ;;;!! ;;                                      begin-column
1055 ;;;!! ;;                                      (- end-column begin-column) 1))))))))))
1056 ;;;!! ;;
1057 ;;;!! ;;(defun mouse-erase-box ()
1058 ;;;!! ;;  (interactive)
1059 ;;;!! ;;  (if last-line-drawn
1060 ;;;!! ;;      (progn
1061 ;;;!! ;;        (x-erase-rectangle (selected-screen))
1062 ;;;!! ;;        (setq last-line-drawn nil))))
1063 ;;;!!
1064 ;;;!! ;;; (defun test-x-rectangle ()
1065 ;;;!! ;;;   (use-local-mouse-map (setq rectangle-test-map (make-sparse-keymap)))
1066 ;;;!! ;;;   (define-key rectangle-test-map mouse-motion-button-left 'mouse-boxing)
1067 ;;;!! ;;;   (define-key rectangle-test-map mouse-button-left-up 'mouse-erase-box))
1068 ;;;!!
1069 ;;;!! ;;
1070 ;;;!! ;; Here is how to do double clicking in lisp.  About to change.
1071 ;;;!! ;;
1072 ;;;!!
1073 ;;;!! (defvar double-start nil)
1074 ;;;!! (defconst double-click-interval 300
1075 ;;;!!   "Max ticks between clicks")
1076 ;;;!!
1077 ;;;!! (defun double-down (event)
1078 ;;;!!   (interactive "@e")
1079 ;;;!!   (if double-start
1080 ;;;!!       (let ((interval (- (nth 4 event) double-start)))
1081 ;;;!!   (if (< interval double-click-interval)
1082 ;;;!!       (progn
1083 ;;;!!         (backward-up-list 1)
1084 ;;;!!         ;;      (message "Interval %d" interval)
1085 ;;;!!         (sleep-for 1)))
1086 ;;;!!   (setq double-start nil))
1087 ;;;!!     (setq double-start (nth 4 event))))
1088 ;;;!!
1089 ;;;!! (defun double-up (event)
1090 ;;;!!   (interactive "@e")
1091 ;;;!!   (and double-start
1092 ;;;!!        (> (- (nth 4 event ) double-start) double-click-interval)
1093 ;;;!!        (setq double-start nil)))
1094 ;;;!!
1095 ;;;!! ;;; (defun x-test-doubleclick ()
1096 ;;;!! ;;;   (use-local-mouse-map (setq doubleclick-test-map (make-sparse-keymap)))
1097 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left 'double-down)
1098 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left-up 'double-up))
1099 ;;;!!
1100 ;;;!! ;;
1101 ;;;!! ;; This scrolls while button is depressed.  Use preferable in scroll bar.
1102 ;;;!! ;;
1103 ;;;!!
1104 ;;;!! (defvar scrolled-lines 0)
1105 ;;;!! (defconst scroll-speed 1)
1106 ;;;!!
1107 ;;;!! (defun incr-scroll-down (event)
1108 ;;;!!   (interactive "@e")
1109 ;;;!!   (setq scrolled-lines 0)
1110 ;;;!!   (incremental-scroll scroll-speed))
1111 ;;;!!
1112 ;;;!! (defun incr-scroll-up (event)
1113 ;;;!!   (interactive "@e")
1114 ;;;!!   (setq scrolled-lines 0)
1115 ;;;!!   (incremental-scroll (- scroll-speed)))
1116 ;;;!!
1117 ;;;!! (defun incremental-scroll (n)
1118 ;;;!!   (while (= (x-mouse-events) 0)
1119 ;;;!!     (setq scrolled-lines (1+ (* scroll-speed scrolled-lines)))
1120 ;;;!!     (scroll-down n)
1121 ;;;!!     (sit-for 300 t)))
1122 ;;;!!
1123 ;;;!! (defun incr-scroll-stop (event)
1124 ;;;!!   (interactive "@e")
1125 ;;;!!   (message "Scrolled %d lines" scrolled-lines)
1126 ;;;!!   (setq scrolled-lines 0)
1127 ;;;!!   (sleep-for 1))
1128 ;;;!!
1129 ;;;!! ;;; (defun x-testing-scroll ()
1130 ;;;!! ;;;   (let ((scrolling-map (function mouse-vertical-scroll-bar-prefix)))
1131 ;;;!! ;;;     (define-key scrolling-map mouse-button-left 'incr-scroll-down)
1132 ;;;!! ;;;     (define-key scrolling-map mouse-button-right 'incr-scroll-up)
1133 ;;;!! ;;;     (define-key scrolling-map mouse-button-left-up 'incr-scroll-stop)
1134 ;;;!! ;;;     (define-key scrolling-map mouse-button-right-up 'incr-scroll-stop)))
1135 ;;;!!
1136 ;;;!! ;;
1137 ;;;!! ;; Some playthings suitable for picture mode?  They need work.
1138 ;;;!! ;;
1139 ;;;!!
1140 ;;;!! (defun mouse-kill-rectangle (event)
1141 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1142 ;;;!!   (interactive "@e")
1143 ;;;!!   (let ((point-save (point)))
1144 ;;;!!     (save-excursion
1145 ;;;!!       (mouse-set-point event)
1146 ;;;!!       (push-mark nil t)
1147 ;;;!!       (if (> point-save (point))
1148 ;;;!!     (kill-rectangle (point) point-save)
1149 ;;;!!   (kill-rectangle point-save (point))))))
1150 ;;;!!
1151 ;;;!! (defun mouse-open-rectangle (event)
1152 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1153 ;;;!!   (interactive "@e")
1154 ;;;!!   (let ((point-save (point)))
1155 ;;;!!     (save-excursion
1156 ;;;!!       (mouse-set-point event)
1157 ;;;!!       (push-mark nil t)
1158 ;;;!!       (if (> point-save (point))
1159 ;;;!!     (open-rectangle (point) point-save)
1160 ;;;!!   (open-rectangle point-save (point))))))
1161 ;;;!!
1162 ;;;!! ;; Must be a better way to do this.
1163 ;;;!!
1164 ;;;!! (defun mouse-multiple-insert (n char)
1165 ;;;!!   (while (> n 0)
1166 ;;;!!     (insert char)
1167 ;;;!!     (setq n (1- n))))
1168 ;;;!!
1169 ;;;!! ;; What this could do is not finalize until button was released.
1170 ;;;!!
1171 ;;;!! (defun mouse-move-text (event)
1172 ;;;!!   "Move text from point to cursor position, inserting spaces."
1173 ;;;!!   (interactive "@e")
1174 ;;;!!   (let* ((relative-coordinate
1175 ;;;!!     (coordinates-in-window-p (car event) (selected-window))))
1176 ;;;!!     (if (consp relative-coordinate)
1177 ;;;!!   (cond ((> (current-column) (car relative-coordinate))
1178 ;;;!!          (delete-char
1179 ;;;!!           (- (car relative-coordinate) (current-column))))
1180 ;;;!!         ((< (current-column) (car relative-coordinate))
1181 ;;;!!          (mouse-multiple-insert
1182 ;;;!!           (- (car relative-coordinate) (current-column)) " "))
1183 ;;;!!         ((= (current-column) (car relative-coordinate)) (ding))))))
1184 \f
1185 ;; Choose a completion with the mouse.
1186
1187 ;; Delete the longest partial match for STRING
1188 ;; that can be found before POINT.
1189 (defun mouse-delete-max-match (string)
1190   (let ((opoint (point))
1191         (len (min (length string)
1192                   (- (point) (point-min)))))
1193     (goto-char (- (point) (length string)))
1194     (while (and (> len 0)
1195                 (let ((tail (buffer-substring (point)
1196                                               (+ (point) len))))
1197                   (not (string= tail (substring string 0 len)))))
1198       (setq len (1- len))
1199       (forward-char 1))
1200     (delete-char len)))
1201
1202 (defun mouse-choose-completion (event)
1203   "Click on an alternative in the `*Completions*' buffer to choose it."
1204   (interactive "e")
1205   (let ((buffer (window-buffer))
1206         choice)
1207     (save-excursion
1208       (set-buffer (window-buffer (posn-window (event-start event))))
1209       (if completion-reference-buffer
1210           (setq buffer completion-reference-buffer))
1211       (save-excursion
1212         (goto-char (posn-point (event-start event)))
1213         (skip-chars-backward "^ \t\n")
1214         (let ((beg (point)))
1215           (skip-chars-forward "^ \t\n")
1216           (setq choice (buffer-substring beg (point))))))
1217     (let ((owindow (selected-window)))
1218       (select-window (posn-window (event-start event)))
1219       (bury-buffer)
1220       (select-window owindow))
1221     (set-buffer buffer)
1222     (mouse-delete-max-match choice)
1223     (insert choice)
1224     ;; Update point in the window that BUFFER is showing in.
1225     (let ((window (get-buffer-window buffer t)))
1226       (set-window-point window (point)))
1227     (and (equal buffer (window-buffer (minibuffer-window)))
1228          (minibuffer-complete-and-exit))))
1229 \f
1230 ;; Font selection.
1231
1232 (defun font-menu-add-default ()
1233   (let* ((default (cdr (assq 'font (frame-parameters (selected-frame)))))
1234          (font-alist x-fixed-font-alist)
1235          (elt (or (assoc "Misc" font-alist) (nth 1 font-alist))))
1236     (if (assoc "Default" elt)
1237         (delete (assoc "Default" elt) elt))
1238     (setcdr elt
1239             (cons (list "Default"
1240                         (cdr (assq 'font (frame-parameters (selected-frame)))))
1241                   (cdr elt)))))
1242
1243 (defvar x-fixed-font-alist
1244   '("Font menu"
1245     ("Misc"
1246      ("6x10" "-misc-fixed-medium-r-normal--10-100-75-75-c-60-*-1")
1247      ("6x12" "-misc-fixed-medium-r-semicondensed--12-110-75-75-c-60-*-1")
1248      ("6x13" "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-*-1")
1249      ("lucida 13"
1250       "-b&h-lucidatypewriter-medium-r-normal-sans-0-0-0-0-m-0-*-1")
1251      ("7x13" "-misc-fixed-medium-r-normal--13-120-75-75-c-70-*-1")
1252      ("7x14" "-misc-fixed-medium-r-normal--14-130-75-75-c-70-*-1")
1253      ("9x15" "-misc-fixed-medium-r-normal--15-140-*-*-c-*-*-1")
1254      ("")
1255      ("clean 8x8" "-schumacher-clean-medium-r-normal--*-80-*-*-c-*-*-1")
1256      ("clean 8x14" "-schumacher-clean-medium-r-normal--*-140-*-*-c-*-*-1")
1257      ("clean 8x10" "-schumacher-clean-medium-r-normal--*-100-*-*-c-*-*-1")
1258      ("clean 8x16" "-schumacher-clean-medium-r-normal--*-160-*-*-c-*-*-1")
1259      ("")
1260      ("sony 8x16" "-sony-fixed-medium-r-normal--16-120-100-100-c-80-*-1")
1261      ("")
1262      ("fixed" "fixed")
1263      ("10x20" "10x20")
1264      ("11x18" "11x18")
1265      ("12x24" "12x24"))
1266 ;;; We don't seem to have these; who knows what they are.
1267 ;;;    ("fg-18" "fg-18")
1268 ;;;    ("fg-25" "fg-25")
1269 ;;;    ("lucidasanstypewriter-12" "lucidasanstypewriter-12")
1270 ;;;    ("lucidasanstypewriter-bold-14" "lucidasanstypewriter-bold-14")
1271 ;;;    ("lucidasanstypewriter-bold-24" "lucidasanstypewriter-bold-24")
1272 ;;;    ("lucidatypewriter-bold-r-24" "-b&h-lucidatypewriter-bold-r-normal-sans-24-240-75-75-m-140-iso8859-1")
1273 ;;;    ("fixed-medium-20" "-misc-fixed-medium-*-*-*-20-*-*-*-*-*-*-*")
1274     ("Courier"
1275      ("8" "-adobe-courier-medium-r-normal--*-80-*-*-m-*-iso8859-1")
1276      ("10" "-adobe-courier-medium-r-normal--*-100-*-*-m-*-iso8859-1")
1277      ("12" "-adobe-courier-medium-r-normal--*-120-*-*-m-*-iso8859-1")
1278      ("14" "-adobe-courier-medium-r-normal--*-140-*-*-m-*-iso8859-1")
1279      ("18" "-adobe-courier-medium-r-normal--*-180-*-*-m-*-iso8859-1")
1280      ("24" "-adobe-courier-medium-r-normal--*-240-*-*-m-*-iso8859-1")
1281      ("8 bold" "-adobe-courier-bold-r-normal--*-80-*-*-m-*-iso8859-1")
1282      ("10 bold" "-adobe-courier-bold-r-normal--*-100-*-*-m-*-iso8859-1")
1283      ("12 bold" "-adobe-courier-bold-r-normal--*-120-*-*-m-*-iso8859-1")
1284      ("14 bold" "-adobe-courier-bold-r-normal--*-140-*-*-m-*-iso8859-1")
1285      ("18 bold" "-adobe-courier-bold-r-normal--*-180-*-*-m-*-iso8859-1")
1286      ("24 bold" "-adobe-courier-bold-r-normal--*-240-*-*-m-*-iso8859-1")
1287      ("8 slant" "-adobe-courier-medium-o-normal--*-80-*-*-m-*-iso8859-1")
1288      ("10 slant" "-adobe-courier-medium-o-normal--*-100-*-*-m-*-iso8859-1")
1289      ("12 slant" "-adobe-courier-medium-o-normal--*-120-*-*-m-*-iso8859-1")
1290      ("14 slant" "-adobe-courier-medium-o-normal--*-140-*-*-m-*-iso8859-1")
1291      ("18 slant" "-adobe-courier-medium-o-normal--*-180-*-*-m-*-iso8859-1")
1292      ("24 slant" "-adobe-courier-medium-o-normal--*-240-*-*-m-*-iso8859-1")
1293      ("8 bold slant" "-adobe-courier-bold-o-normal--*-80-*-*-m-*-iso8859-1")
1294      ("10 bold slant" "-adobe-courier-bold-o-normal--*-100-*-*-m-*-iso8859-1")
1295      ("12 bold slant" "-adobe-courier-bold-o-normal--*-120-*-*-m-*-iso8859-1")
1296      ("14 bold slant" "-adobe-courier-bold-o-normal--*-140-*-*-m-*-iso8859-1")
1297      ("18 bold slant" "-adobe-courier-bold-o-normal--*-180-*-*-m-*-iso8859-1")
1298      ("24 bold slant" "-adobe-courier-bold-o-normal--*-240-*-*-m-*-iso8859-1"))
1299     )
1300   "X fonts suitable for use in Emacs.")
1301
1302 (defun mouse-set-font (&optional font)
1303   "Select an emacs font from a list of known good fonts"
1304   (interactive
1305    (x-popup-menu last-nonmenu-event x-fixed-font-alist))
1306   (if font
1307       (progn (modify-frame-parameters (selected-frame)
1308                                       (list (cons 'font font)))
1309              ;; Update some standard faces too.
1310              (set-face-font 'bold nil (selected-frame))
1311              (make-face-bold 'bold (selected-frame) t)
1312              (set-face-font 'italic nil (selected-frame))
1313              (make-face-italic 'italic (selected-frame) t)
1314              (set-face-font 'bold-italic nil (selected-frame))
1315              (make-face-bold-italic 'bold-italic (selected-frame) t)
1316              ;; Update any nonstandard faces whose definition is
1317              ;; "a bold/italic/bold&italic version of the frame's font".
1318              (let ((rest global-face-data))
1319                (while rest
1320                  (condition-case nil
1321                      (if (listp (face-font (cdr (car rest))))
1322                          (let ((bold (memq 'bold (face-font (cdr (car rest)))))
1323                                (italic (memq 'italic (face-font (cdr (car rest))))))
1324                            (if (and bold italic)
1325                                (make-face-bold-italic (car (car rest)) (selected-frame))
1326                              (if bold
1327                                  (make-face-bold (car (car rest)) (selected-frame))
1328                                (if italic
1329                                    (make-face-italic (car (car rest)) (selected-frame)))))))
1330                    (error nil))
1331                  (setq rest (cdr rest))))
1332              )))
1333 \f
1334 ;;; Bindings for mouse commands.
1335
1336 (define-key global-map [down-mouse-1] 'mouse-drag-region)
1337 (global-set-key [mouse-1]       'mouse-set-point)
1338 (global-set-key [drag-mouse-1]  'mouse-set-region)
1339
1340 ;; These are tested for in mouse-drag-region.
1341 (global-set-key [double-mouse-1] 'mouse-set-point)
1342 (global-set-key [triple-mouse-1] 'mouse-set-point)
1343
1344 (global-set-key [mouse-2]       'mouse-yank-at-click)
1345 (global-set-key [mouse-3]       'mouse-save-then-kill)
1346
1347 ;; By binding these to down-going events, we let the user use the up-going
1348 ;; event to make the selection, saving a click.
1349 (global-set-key [C-down-mouse-1]        'mouse-buffer-menu)
1350 (global-set-key [C-down-mouse-3]        'mouse-set-font)
1351
1352 ;; Replaced with dragging mouse-1
1353 ;; (global-set-key [S-mouse-1]  'mouse-set-mark)
1354
1355 (global-set-key [mode-line mouse-1] 'mouse-select-window)
1356 (global-set-key [mode-line mouse-2] 'mouse-delete-other-windows)
1357 (global-set-key [mode-line mouse-3] 'mouse-delete-window)
1358 (global-set-key [mode-line C-mouse-2] 'mouse-split-window-horizontally)
1359
1360 (provide 'mouse)
1361
1362 ;;; mouse.el ends here