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 \f
  40 (defun mouse-delete-window (click)
  41   "Delete the window you click on.
  42 This must be bound to a mouse click."
  43   (interactive "e")
  44   (delete-window (posn-window (event-start click))))
  45
  46 (defun mouse-tear-off-window (click)
  47   "Delete the window clicked on, and create a new frame displaying its buffer."
  48   (interactive "e")
  49   (let* ((window (posn-window (event-start click)))
  50          (buf (window-buffer window))
  51          (frame (new-frame)))
  52     (select-frame frame)
  53     (switch-to-buffer buf)
  54     (delete-window window)))
  55
  56 (defun mouse-delete-other-windows ()
  57   "Delete all window except the one you click on."
  58   (interactive "@")
  59   (delete-other-windows))
  60
  61 (defun mouse-split-window-vertically (click)
  62   "Select Emacs window mouse is on, then split it vertically in half.
  63 The window is split at the line clicked on.
  64 This command must be bound to a mouse click."
  65   (interactive "@e")
  66   (let ((start (event-start click)))
  67     (select-window (posn-window start))
  68     (let ((new-height (if (eq (posn-point start) 'vertical-scroll-bar)
  69                           (scroll-bar-scale (posn-col-row start)
  70                                             (1- (window-height)))
  71                         (1+ (cdr (posn-col-row (event-end click))))))
  72           (first-line window-min-height)
  73           (last-line (- (window-height) window-min-height)))
  74       (if (< last-line first-line)
  75           (error "window too short to split")
  76         (split-window-vertically
  77          (min (max new-height first-line) last-line))))))
  78
  79 (defun mouse-split-window-horizontally (click)
  80   "Select Emacs window mouse is on, then split it horizontally in half.
  81 The window is split at the column clicked on.
  82 This command must be bound to a mouse click."
  83   (interactive "@e")
  84   (let ((start (event-start click)))
  85     (select-window (posn-window start))
  86     (let ((new-width (1+ (car (posn-col-row (event-end click)))))
  87           (first-col window-min-width)
  88           (last-col (- (window-width) window-min-width)))
  89       (if (< last-col first-col)
  90           (error "window too narrow to split")
  91         (split-window-horizontally
  92          (min (max new-width first-col) last-col))))))
  93
  94 (defun mouse-set-point (event)
  95   "Move point to the position clicked on with the mouse.
  96 This should be bound to a mouse click event type."
  97   (interactive "e")
  98   ;; Use event-end in case called from mouse-drag-region.
  99   ;; If EVENT is a click, event-end and event-start give same value.
 100   (let ((posn (event-end event)))
 101     (and (window-minibuffer-p (posn-window posn))
 102          (not (minibuffer-window-active-p (posn-window posn)))
 103          (error "Minibuffer window is not active"))
 104     (select-window (posn-window posn))
 105     (if (numberp (posn-point posn))
 106         (goto-char (posn-point posn)))))
 107
 108 (defun mouse-set-region (click)
 109   "Set the region to the text dragged over, and copy to kill ring.
 110 This should be bound to a mouse drag event."
 111   (interactive "e")
 112   (let ((posn (event-start click))
 113         (end (event-end click)))
 114     (select-window (posn-window posn))
 115     (if (numberp (posn-point posn))
 116         (goto-char (posn-point posn)))
 117     ;; If mark is highlighted, no need to bounce the cursor.
 118     (or (and transient-mark-mode
 119              (eq (framep (selected-frame)) 'x))
 120         (sit-for 1))
 121     (push-mark)
 122     (set-mark (point))
 123     (if (numberp (posn-point end))
 124         (goto-char (posn-point end)))
 125     ;; Don't set this-command to kill-region, so that a following
 126     ;; C-w will not double the text in the kill ring.
 127     (let (this-command)
 128       (copy-region-as-kill (mark) (point)))))
 129
 130 (defvar mouse-scroll-delay 0.25
 131   "*The pause between scroll steps caused by mouse drags, in seconds.
 132 If you drag the mouse beyond the edge of a window, Emacs scrolls the
 133 window to bring the text beyond that edge into view, with a delay of
 134 this many seconds between scroll steps.  Scrolling stops when you move
 135 the mouse back into the window, or release the button.
 136 This variable's value may be non-integral.
 137 Setting this to zero causes Emacs to scroll as fast as it can.")
 138
 139 (defun mouse-scroll-subr (jump &optional overlay start)
 140   "Scroll the selected window JUMP lines at a time, until new input arrives.
 141 If OVERLAY is an overlay, let it stretch from START to the far edge of
 142 the newly visible text.
 143 Upon exit, point is at the far edge of the newly visible text."
 144   (while (progn
 145            (goto-char (window-start))
 146            (if (not (zerop (vertical-motion jump)))
 147                (progn
 148                  (set-window-start (selected-window) (point))
 149                  (if (natnump jump)
 150                      (progn
 151                        (goto-char (window-end (selected-window)))
 152                        ;; window-end doesn't reflect the window's new
 153                        ;; start position until the next redisplay.  Hurrah.
 154                        (vertical-motion (1- jump)))
 155                    (goto-char (window-start (selected-window))))
 156                  (if overlay
 157                      (move-overlay overlay start (point)))
 158                  (if (not (eobp))
 159                      (sit-for mouse-scroll-delay))))))
 160   (point))
 161
 162 (defvar mouse-drag-overlay (make-overlay 1 1))
 163 (overlay-put mouse-drag-overlay 'face 'region)
 164
 165 (defvar mouse-selection-click-count 0)
 166
 167 (defun mouse-drag-region (start-event)
 168   "Set the region to the text that the mouse is dragged over.
 169 Highlight the drag area as you move the mouse.
 170 This must be bound to a button-down mouse event.
 171 In Transient Mark mode, the highlighting remains once you
 172 release the mouse button.  Otherwise, it does not."
 173   (interactive "e")
 174   (let* ((start-posn (event-start start-event))
 175          (start-point (posn-point start-posn))
 176          (start-window (posn-window start-posn))
 177          (start-frame (window-frame start-window))
 178          (bounds (window-edges start-window))
 179          (top (nth 1 bounds))
 180          (bottom (if (window-minibuffer-p start-window)
 181                      (nth 3 bounds)
 182                    ;; Don't count the mode line.
 183                    (1- (nth 3 bounds))))
 184          (click-count (1- (event-click-count start-event))))
 185     (setq mouse-selection-click-count click-count)
 186     (mouse-set-point start-event)
 187     (let ((range (mouse-start-end start-point start-point click-count)))
 188       (move-overlay mouse-drag-overlay (car range) (nth 1 range)
 189                     (window-buffer start-window)))
 190     (deactivate-mark)
 191     (let (event end end-point)
 192       (track-mouse
 193         (while (progn
 194                  (setq event (read-event))
 195                  (or (mouse-movement-p event)
 196                      (eq (car-safe event) 'switch-frame)))
 197           (if (eq (car-safe event) 'switch-frame)
 198               nil
 199             (setq end (event-end event)
 200                   end-point (posn-point end))
 201
 202             (cond
 203
 204              ;; Ignore switch-frame events.
 205              ((eq (car-safe event) 'switch-frame))
 206
 207              ;; Are we moving within the original window?
 208              ((and (eq (posn-window end) start-window)
 209                    (integer-or-marker-p end-point))
 210               (goto-char end-point)
 211               (let ((range (mouse-start-end start-point (point) click-count)))
 212                 (move-overlay mouse-drag-overlay (car range) (nth 1 range))))
 213
 214              ;; Are we moving on a different window on the same frame?
 215              ((and (windowp (posn-window end))
 216                    (eq (window-frame (posn-window end)) start-frame))
 217               (let ((mouse-row
 218                      (+ (nth 1 (window-edges (posn-window end)))
 219                         (cdr (posn-col-row end)))))
 220                 (cond
 221                  ((< mouse-row top)
 222                   (mouse-scroll-subr
 223                    (- mouse-row top) mouse-drag-overlay start-point))
 224                  ((and (not (eobp))
 225                        (>= mouse-row bottom))
 226                   (mouse-scroll-subr (1+ (- mouse-row bottom))
 227                                      mouse-drag-overlay start-point)))))
 228
 229              (t
 230               (let ((mouse-y (cdr (cdr (mouse-position))))
 231                     (menu-bar-lines (or (cdr (assq 'menu-bar-lines
 232                                                    (frame-parameters)))
 233                                         0)))
 234
 235                 ;; Are we on the menu bar?
 236                 (and (integerp mouse-y) (< mouse-y menu-bar-lines)
 237                      (mouse-scroll-subr (- mouse-y menu-bar-lines)
 238                                         mouse-drag-overlay start-point))))))))
 239
 240       (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 241                (eq (posn-window (event-end event)) start-window)
 242                (numberp (posn-point (event-end event))))
 243           (let ((fun (key-binding (vector (car event)))))
 244             (if (memq fun '(mouse-set-region mouse-set-point))
 245                 (if (not (= (overlay-start mouse-drag-overlay)
 246                             (overlay-end mouse-drag-overlay)))
 247                     (let (this-command)
 248                       (push-mark (overlay-start mouse-drag-overlay) t t)
 249                       (goto-char (overlay-end mouse-drag-overlay))
 250                       (copy-region-as-kill (point) (mark t)))
 251                   (goto-char (overlay-end mouse-drag-overlay))
 252                   (setq this-command 'mouse-set-point))
 253               (if (fboundp fun)
 254                   (funcall fun event)))))
 255       (delete-overlay mouse-drag-overlay))))
 256 \f
 257 ;; Commands to handle xterm-style multiple clicks.
 258
 259 (defun mouse-skip-word (dir)
 260   "Skip over word, over whitespace, or over identical punctuation.
 261 If DIR is positive skip forward; if negative, skip backward."
 262   (let* ((char (following-char))
 263          (syntax (char-to-string (char-syntax char))))
 264     (if (or (string= syntax "w") (string= syntax " "))
 265         (if (< dir 0)
 266             (skip-syntax-backward syntax)
 267           (skip-syntax-forward syntax))
 268       (if (< dir 0)
 269           (while (and (not (bobp)) (= (preceding-char) char))
 270             (forward-char -1))
 271         (while (and (not (eobp)) (= (following-char) char))
 272           (forward-char 1))))))
 273
 274 ;; Return a list of region bounds based on START and END according to MODE.
 275 ;; If MODE is 0 then set point to (min START END), mark to (max START END).
 276 ;; If MODE is 1 then set point to start of word at (min START END),
 277 ;; mark to end of word at (max START END).
 278 ;; If MODE is 2 then do the same for lines.
 279 (defun mouse-start-end (start end mode)
 280   (if (> start end)
 281       (let ((temp start))
 282         (setq start end
 283               end temp)))
 284   (setq mode (mod mode 3))
 285   (cond ((= mode 0)
 286          (list start end))
 287         ((and (= mode 1)
 288               (= start end)
 289               (not (eobp))
 290               (= (char-syntax (char-after start)) ?\())
 291          (list start (save-excursion (forward-sexp 1) (point))))
 292         ((and (= mode 1)
 293               (= start end)
 294               (not (eobp))
 295               (= (char-syntax (char-after start)) ?\)))
 296          (list (save-excursion
 297                  (goto-char (1+ start))
 298                  (backward-sexp 1)
 299                  (point))
 300                (1+ start)))
 301         ((= mode 1)
 302          (list (save-excursion
 303                  (goto-char start)
 304                  (mouse-skip-word -1)
 305                  (point))
 306                (save-excursion
 307                  (goto-char end)
 308                  (mouse-skip-word 1)
 309                  (point))))
 310         ((= mode 2)
 311          (list (save-excursion
 312                  (goto-char start)
 313                  (beginning-of-line 1)
 314                  (point))
 315                (save-excursion
 316                  (goto-char end)
 317                  (forward-line 1)
 318                  (point))))))
 319 \f
 320 ;; Subroutine: set the mark where CLICK happened,
 321 ;; but don't do anything else.
 322 (defun mouse-set-mark-fast (click)
 323   (let ((posn (event-start click)))
 324     (select-window (posn-window posn))
 325     (if (numberp (posn-point posn))
 326         (push-mark (posn-point posn) t t))))
 327
 328 ;; Momentarily show where the mark is, if highlighting doesn't show it.
 329 (defun mouse-show-mark ()
 330   (or transient-mark-mode
 331       (save-excursion
 332         (goto-char (mark t))
 333         (sit-for 1))))
 334
 335 (defun mouse-set-mark (click)
 336   "Set mark at the position clicked on with the mouse.
 337 Display cursor at that position for a second.
 338 This must be bound to a mouse click."
 339   (interactive "e")
 340   (let ((point-save (point)))
 341     (unwind-protect
 342         (progn (mouse-set-point click)
 343                (push-mark nil t t)
 344                (or transient-mark-mode
 345                    (sit-for 1)))
 346       (goto-char point-save))))
 347
 348 (defun mouse-kill (click)
 349   "Kill the region between point and the mouse click.
 350 The text is saved in the kill ring, as with \\[kill-region]."
 351   (interactive "e")
 352   (let ((click-posn (posn-point (event-start click))))
 353     (if (numberp click-posn)
 354         (kill-region (min (point) click-posn)
 355                      (max (point) click-posn)))))
 356
 357 (defun mouse-yank-at-click (click arg)
 358   "Insert the last stretch of killed text at the position clicked on.
 359 Prefix arguments are interpreted as with \\[yank]."
 360   (interactive "e\nP")
 361   (mouse-set-point click)
 362   (setq this-command 'yank)
 363   (yank arg))
 364
 365 (defun mouse-kill-ring-save (click)
 366   "Copy the region between point and the mouse click in the kill ring.
 367 This does not delete the region; it acts like \\[kill-ring-save]."
 368   (interactive "e")
 369   (mouse-set-mark-fast click)
 370   (kill-ring-save (point) (mark t))
 371   (mouse-show-mark))
 372
 373 ;;; This function used to delete the text between point and the mouse
 374 ;;; whenever it was equal to the front of the kill ring, but some
 375 ;;; people found that confusing.
 376
 377 ;;; A list (TEXT START END), describing the text and position of the last
 378 ;;; invocation of mouse-save-then-kill.
 379 (defvar mouse-save-then-kill-posn nil)
 380
 381 (defun mouse-save-then-kill-delete-region (beg end)
 382   ;; We must make our own undo boundaries
 383   ;; because they happen automatically only for the current buffer.
 384   (undo-boundary)
 385   (if (or (= beg end) (eq buffer-undo-list t))
 386       ;; If we have no undo list in this buffer,
 387       ;; just delete.
 388       (delete-region beg end)
 389     ;; Delete, but make the undo-list entry share with the kill ring.
 390     ;; First, delete just one char, so in case buffer is being modified
 391     ;; for the first time, the undo list records that fact.
 392     (delete-region beg
 393                    (+ beg (if (> end beg) 1 -1)))
 394     (let ((buffer-undo-list buffer-undo-list))
 395       ;; Undo that deletion--but don't change the undo list!
 396       (primitive-undo 1 buffer-undo-list)
 397       ;; Now delete the rest of the specified region,
 398       ;; but don't record it.
 399       (setq buffer-undo-list t)
 400       (if (/= (length (car kill-ring)) (- (max end beg) (min end beg)))
 401           (error "Lossage in mouse-save-then-kill-delete-region"))
 402       (delete-region beg end))
 403     (let ((tail buffer-undo-list))
 404       ;; Search back in buffer-undo-list for the string
 405       ;; that came from deleting one character.
 406       (while (and tail (not (stringp (car (car tail)))))
 407         (setq tail (cdr tail)))
 408       ;; Replace it with an entry for the entire deleted text.
 409       (and tail
 410            (setcar tail (cons (car kill-ring) (min beg end))))))
 411   (undo-boundary))
 412
 413 (defun mouse-save-then-kill (click)
 414   "Save text to point in kill ring; the second time, kill the text.
 415 If the text between point and the mouse is the same as what's
 416 at the front of the kill ring, this deletes the text.
 417 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 418 which prepares for a second click to delete the text.
 419
 420 If you have selected words or lines, this command extends the
 421 selection through the word or line clicked on.  If you do this
 422 again in a different position, it extends the selection again.
 423 If you do this twice in the same position, the selection is killed."
 424   (interactive "e")
 425   (let ((click-posn (posn-point (event-start click)))
 426         ;; Don't let a subsequent kill command append to this one:
 427         ;; prevent setting this-command to kill-region.
 428         (this-command this-command))
 429     (if (> (mod mouse-selection-click-count 3) 0)
 430         (if (not (and (eq last-command 'mouse-save-then-kill)
 431                       (equal click-posn
 432                              (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 433             ;; Find both ends of the object selected by this click.
 434             (let* ((range
 435                     (mouse-start-end click-posn click-posn
 436                                      mouse-selection-click-count)))
 437               ;; Move whichever end is closer to the click.
 438               ;; That's what xterm does, and it seems reasonable.
 439               (if (< (abs (- click-posn (mark t)))
 440                      (abs (- click-posn (point))))
 441                   (set-mark (car range))
 442                 (goto-char (nth 1 range)))
 443               ;; We have already put the old region in the kill ring.
 444               ;; Replace it with the extended region.
 445               ;; (It would be annoying to make a separate entry.)
 446               (setcar kill-ring (buffer-substring (point) (mark t)))
 447               (if interprogram-cut-function
 448                   (funcall interprogram-cut-function (car kill-ring)))
 449               ;; Arrange for a repeated mouse-3 to kill this region.
 450               (setq mouse-save-then-kill-posn
 451                     (list (car kill-ring) (point) click-posn))
 452               (mouse-show-mark))
 453           ;; If we click this button again without moving it,
 454           ;; that time kill.
 455           (mouse-save-then-kill-delete-region (point) (mark))
 456           (setq mouse-selection-click-count 0)
 457           (setq mouse-save-then-kill-posn nil))
 458       (if (and (eq last-command 'mouse-save-then-kill)
 459                mouse-save-then-kill-posn
 460                (eq (car mouse-save-then-kill-posn) (car kill-ring))
 461                (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 462           ;; If this is the second time we've called
 463           ;; mouse-save-then-kill, delete the text from the buffer.
 464           (progn
 465             (mouse-save-then-kill-delete-region (point) (mark))
 466             ;; After we kill, another click counts as "the first time".
 467             (setq mouse-save-then-kill-posn nil))
 468         (if (or (and (eq last-command 'mouse-save-then-kill)
 469                      mouse-save-then-kill-posn)
 470                 (and mark-active transient-mark-mode)
 471                 (and (eq last-command 'mouse-drag-region)
 472                      (or mark-even-if-inactive
 473                          (not transient-mark-mode))))
 474             ;; We have a selection or suitable region, so adjust it.
 475             (let* ((posn (event-start click))
 476                    (new (posn-point posn)))
 477               (select-window (posn-window posn))
 478               (if (numberp new)
 479                   (progn
 480                     ;; Move whichever end of the region is closer to the click.
 481                     ;; That is what xterm does, and it seems reasonable.
 482                     (if (< (abs (- new (point))) (abs (- new (mark t))))
 483                         (goto-char new)
 484                       (set-mark new))
 485                     (setq deactivate-mark nil)))
 486               (setcar kill-ring (buffer-substring (point) (mark t)))
 487               (if interprogram-cut-function
 488                   (funcall interprogram-cut-function (car kill-ring))))
 489           ;; We just have point, so set mark here.
 490           (mouse-set-mark-fast click)
 491           (kill-ring-save (point) (mark t))
 492           (mouse-show-mark))
 493         (setq mouse-save-then-kill-posn
 494               (list (car kill-ring) (point) click-posn))))))
 495 \f
 496 (global-set-key [M-mouse-1] 'mouse-start-secondary)
 497 (global-set-key [M-drag-mouse-1] 'mouse-set-secondary)
 498 (global-set-key [M-down-mouse-1] 'mouse-drag-secondary)
 499 (global-set-key [M-mouse-3] 'mouse-secondary-save-then-kill)
 500 (global-set-key [M-mouse-2] 'mouse-yank-secondary)
 501
 502 ;; An overlay which records the current secondary selection
 503 ;; or else is deleted when there is no secondary selection.
 504 ;; May be nil.
 505 (defvar mouse-secondary-overlay nil)
 506
 507 ;; A marker which records the specified first end for a secondary selection.
 508 ;; May be nil.
 509 (defvar mouse-secondary-start nil)
 510
 511 (defun mouse-start-secondary (click)
 512   "Set one end of the secondary selection to the position clicked on.
 513 Use \\[mouse-secondary-save-then-kill] to set the other end
 514 and complete the secondary selection."
 515   (interactive "e")
 516   (let ((posn (event-start click)))
 517     (save-excursion
 518       (set-buffer (window-buffer (posn-window posn)))
 519       ;; Cancel any preexisting secondary selection.
 520       (if mouse-secondary-overlay
 521           (delete-overlay mouse-secondary-overlay))
 522       (if (numberp (posn-point posn))
 523           (progn
 524             (or mouse-secondary-start
 525                 (setq mouse-secondary-start (make-marker)))
 526             (move-marker mouse-secondary-start (posn-point posn)))))))
 527
 528 (defun mouse-set-secondary (click)
 529   "Set the secondary selection to the text that the mouse is dragged over.
 530 This must be bound to a mouse drag event."
 531   (interactive "e")
 532   (let ((posn (event-start click))
 533         beg
 534         (end (event-end click)))
 535     (save-excursion
 536       (set-buffer (window-buffer (posn-window posn)))
 537       (if (numberp (posn-point posn))
 538           (setq beg (posn-point posn)))
 539       (if mouse-secondary-overlay
 540           (move-overlay mouse-secondary-overlay beg (posn-point end))
 541         (setq mouse-secondary-overlay (make-overlay beg (posn-point end))))
 542       (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 543
 544 (defun mouse-drag-secondary (start-event)
 545   "Set the secondary selection to the text that the mouse is dragged over.
 546 Highlight the drag area as you move the mouse.
 547 This must be bound to a button-down mouse event."
 548   (interactive "e")
 549   (let* ((start-posn (event-start start-event))
 550          (start-point (posn-point start-posn))
 551          (start-window (posn-window start-posn))
 552          (start-frame (window-frame start-window))
 553          (bounds (window-edges start-window))
 554          (top (nth 1 bounds))
 555          (bottom (if (window-minibuffer-p start-window)
 556                      (nth 3 bounds)
 557                    ;; Don't count the mode line.
 558                    (1- (nth 3 bounds))))
 559          (click-count (1- (event-click-count start-event))))
 560     (save-excursion
 561       (set-buffer (window-buffer start-window))
 562       (setq mouse-selection-click-count click-count)
 563       (or mouse-secondary-overlay
 564           (setq mouse-secondary-overlay
 565                 (make-overlay (point) (point))))
 566       (overlay-put mouse-secondary-overlay 'face 'secondary-selection)
 567       (if (> (mod click-count 3) 0)
 568           ;; Double or triple press: make an initial selection
 569           ;; of one word or line.
 570           (let ((range (mouse-start-end start-point start-point click-count)))
 571             (set-marker mouse-secondary-start nil)
 572             (move-overlay mouse-secondary-overlay 1 1
 573                           (window-buffer start-window))
 574             (move-overlay mouse-secondary-overlay (car range) (nth 1 range)
 575                           (window-buffer start-window)))
 576         ;; Single-press: cancel any preexisting secondary selection.
 577         (or mouse-secondary-start
 578             (setq mouse-secondary-start (make-marker)))
 579         (set-marker mouse-secondary-start start-point)
 580         (delete-overlay mouse-secondary-overlay))
 581       (let (event end end-point)
 582         (track-mouse
 583           (while (progn
 584                    (setq event (read-event))
 585                    (or (mouse-movement-p event)
 586                        (eq (car-safe event) 'switch-frame)))
 587
 588             (if (eq (car-safe event) 'switch-frame)
 589                 nil
 590               (setq end (event-end event)
 591                     end-point (posn-point end))
 592               (cond
 593
 594                ;; Ignore switch-frame events.
 595                ((eq (car-safe event) 'switch-frame))
 596
 597                ;; Are we moving within the original window?
 598                ((and (eq (posn-window end) start-window)
 599                      (integer-or-marker-p end-point))
 600                 (if (/= start-point end-point)
 601                     (set-marker mouse-secondary-start nil))
 602                 (let ((range (mouse-start-end start-point end-point
 603                                               click-count)))
 604                   (move-overlay mouse-secondary-overlay
 605                                 (car range) (nth 1 range))))
 606
 607                ;; Are we moving on a different window on the same frame?
 608                ((and (windowp (posn-window end))
 609                      (eq (window-frame (posn-window end)) start-frame))
 610                 (let ((mouse-row
 611                        (+ (nth 1 (window-edges (posn-window end)))
 612                           (cdr (posn-col-row end)))))
 613                   (cond
 614                    ((< mouse-row top)
 615                     (mouse-scroll-subr
 616                      (- mouse-row top) mouse-secondary-overlay start-point))
 617                    ((and (not (eobp))
 618                          (>= mouse-row bottom))
 619                     (mouse-scroll-subr (1+ (- mouse-row bottom))
 620                                        mouse-drag-overlay start-point)))))
 621
 622                (t
 623                 (let ((mouse-y (cdr (cdr (mouse-position))))
 624                       (menu-bar-lines (or (cdr (assq 'menu-bar-lines
 625                                                      (frame-parameters)))
 626                                           0)))
 627
 628                   ;; Are we on the menu bar?
 629                   (and (integerp mouse-y) (< mouse-y menu-bar-lines)
 630                        (mouse-scroll-subr (- mouse-y menu-bar-lines)
 631                                           mouse-secondary-overlay start-point))))))))
 632
 633         (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 634                  (eq (posn-window (event-end event)) start-window)
 635                  (numberp (posn-point (event-end event))))
 636             (if (marker-position mouse-secondary-start)
 637                 (save-window-excursion
 638                   (delete-overlay mouse-secondary-overlay)
 639                   (x-set-selection 'SECONDARY nil)
 640                   (select-window start-window)
 641                   (save-excursion
 642                     (goto-char mouse-secondary-start)
 643                     (sit-for 1)))
 644               (x-set-selection
 645                'SECONDARY
 646                (buffer-substring (overlay-start mouse-secondary-overlay)
 647                                  (overlay-end mouse-secondary-overlay)))))))))
 648
 649 (defun mouse-yank-secondary (click)
 650   "Insert the secondary selection at the position clicked on."
 651   (interactive "e")
 652   (save-excursion
 653     (set-buffer (window-buffer (posn-window (event-start click))))
 654     (goto-char (posn-point (event-start click)))
 655     (insert (x-get-selection 'SECONDARY))))
 656
 657 (defun mouse-kill-secondary ()
 658   "Kill the text in the secondary selection.
 659 This is intended more as a keyboard command than as a mouse command
 660 but it can work as either one.
 661
 662 The current buffer (in case of keyboard use), or the buffer clicked on,
 663 must be the one that the secondary selection is in.  This requirement
 664 is to prevent accidents."
 665   (interactive)
 666   (let* ((keys (this-command-keys))
 667          (click (elt keys (1- (length keys)))))
 668     (or (eq (overlay-buffer mouse-secondary-overlay)
 669             (if (listp click)
 670                 (window-buffer (posn-window (event-start click)))
 671               (current-buffer)))
 672         (error "Select or click on the buffer where the secondary selection is")))
 673   (save-excursion
 674     (set-buffer (overlay-buffer mouse-secondary-overlay))
 675     (kill-region (overlay-start mouse-secondary-overlay)
 676                  (overlay-end mouse-secondary-overlay)))
 677   (delete-overlay mouse-secondary-overlay)
 678   (x-set-selection 'SECONDARY nil)
 679   (setq mouse-secondary-overlay nil))
 680
 681 (defun mouse-secondary-save-then-kill (click)
 682   "Save text to point in kill ring; the second time, kill the text.
 683 If the text between point and the mouse is the same as what's
 684 at the front of the kill ring, this deletes the text.
 685 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 686 which prepares for a second click to delete the text.
 687
 688 If you have selected words or lines, this command extends the
 689 selection through the word or line clicked on.  If you do this
 690 again in a different position, it extends the selection again.
 691 If you do this twice in the same position, the selection is killed."
 692   (interactive "e")
 693   (let ((posn (event-start click))
 694         (click-posn (posn-point (event-start click)))
 695         ;; Don't let a subsequent kill command append to this one:
 696         ;; prevent setting this-command to kill-region.
 697         (this-command this-command))
 698     (or (eq (window-buffer (posn-window posn))
 699             (or (and mouse-secondary-overlay
 700                      (overlay-buffer mouse-secondary-overlay))
 701                 (if mouse-secondary-start
 702                     (marker-buffer mouse-secondary-start))))
 703         (error "Wrong buffer"))
 704     (save-excursion
 705       (set-buffer (window-buffer (posn-window posn)))
 706       (if (> (mod mouse-selection-click-count 3) 0)
 707           (if (not (and (eq last-command 'mouse-secondary-save-then-kill)
 708                         (equal click-posn
 709                                (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 710               ;; Find both ends of the object selected by this click.
 711               (let* ((range
 712                       (mouse-start-end click-posn click-posn
 713                                        mouse-selection-click-count)))
 714                 ;; Move whichever end is closer to the click.
 715                 ;; That's what xterm does, and it seems reasonable.
 716                 (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 717                        (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 718                     (move-overlay mouse-secondary-overlay (car range)
 719                                   (overlay-end mouse-secondary-overlay))
 720                   (move-overlay mouse-secondary-overlay
 721                                 (overlay-start mouse-secondary-overlay)
 722                                 (nth 1 range)))
 723                 ;; We have already put the old region in the kill ring.
 724                 ;; Replace it with the extended region.
 725                 ;; (It would be annoying to make a separate entry.)
 726                 (setcar kill-ring (buffer-substring
 727                                    (overlay-start mouse-secondary-overlay)
 728                                    (overlay-end mouse-secondary-overlay)))
 729                 (if interprogram-cut-function
 730                     (funcall interprogram-cut-function (car kill-ring)))
 731                 ;; Arrange for a repeated mouse-3 to kill this region.
 732                 (setq mouse-save-then-kill-posn
 733                       (list (car kill-ring) (point) click-posn)))
 734             ;; If we click this button again without moving it,
 735             ;; that time kill.
 736             (progn
 737               (mouse-save-then-kill-delete-region
 738                (overlay-start mouse-secondary-overlay)
 739                (overlay-end mouse-secondary-overlay))
 740               (setq mouse-save-then-kill-posn nil)
 741               (setq mouse-selection-click-count 0)
 742               (delete-overlay mouse-secondary-overlay)))
 743         (if (and (eq last-command 'mouse-secondary-save-then-kill)
 744                  mouse-save-then-kill-posn
 745                  (eq (car mouse-save-then-kill-posn) (car kill-ring))
 746                  (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 747             ;; If this is the second time we've called
 748             ;; mouse-secondary-save-then-kill, delete the text from the buffer.
 749             (progn
 750               (mouse-save-then-kill-delete-region
 751                (overlay-start mouse-secondary-overlay)
 752                (overlay-end mouse-secondary-overlay))
 753               (setq mouse-save-then-kill-posn nil)
 754               (delete-overlay mouse-secondary-overlay))
 755           (if (overlay-start mouse-secondary-overlay)
 756               ;; We have a selection, so adjust it.
 757               (progn
 758                 (if (numberp click-posn)
 759                     (progn
 760                       ;; Move whichever end of the region is closer to the click.
 761                       ;; That is what xterm does, and it seems reasonable.
 762                       (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 763                              (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 764                           (move-overlay mouse-secondary-overlay click-posn
 765                                         (overlay-end mouse-secondary-overlay))
 766                         (move-overlay mouse-secondary-overlay
 767                                       (overlay-start mouse-secondary-overlay)
 768                                       click-posn))
 769                       (setq deactivate-mark nil)))
 770                 (setcar kill-ring (buffer-substring
 771                                    (overlay-start mouse-secondary-overlay)
 772                                    (overlay-end mouse-secondary-overlay)))
 773                 (if interprogram-cut-function
 774                     (funcall interprogram-cut-function (car kill-ring))))
 775             (if mouse-secondary-start
 776                 ;; All we have is one end of a selection,
 777                 ;; so put the other end here.
 778                 (let ((start (+ 0 mouse-secondary-start)))
 779                   (kill-ring-save start click-posn)
 780                   (if mouse-secondary-overlay
 781                       (move-overlay mouse-secondary-overlay start click-posn)
 782                     (setq mouse-secondary-overlay (make-overlay start click-posn)))
 783                   (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 784           (setq mouse-save-then-kill-posn
 785                 (list (car kill-ring) (point) click-posn))))
 786       (x-set-selection 'SECONDARY
 787                        (if (overlay-buffer mouse-secondary-overlay)
 788                            (buffer-substring
 789                             (overlay-start mouse-secondary-overlay)
 790                             (overlay-end mouse-secondary-overlay)))))))
 791 \f
 792 (defun mouse-buffer-menu (event)
 793   "Pop up a menu of buffers for selection with the mouse.
 794 This switches buffers in the window that you clicked on,
 795 and selects that window."
 796   (interactive "e")
 797   (let ((menu
 798          (list "Buffer Menu"
 799                (cons "Select Buffer"
 800                      (let ((tail (buffer-list))
 801                            (maxbuf 0)
 802                            head)
 803                        (while tail
 804                          (or (eq ?\ (aref (buffer-name (car tail)) 0))
 805                              (setq maxbuf
 806                                    (max maxbuf
 807                                         (length (buffer-name (car tail))))))
 808                          (setq tail (cdr tail)))
 809                        (setq tail (buffer-list))
 810                        (while tail
 811                          (let ((elt (car tail)))
 812                            (if (not (string-match "^ "
 813                                                   (buffer-name elt)))
 814                                (setq head (cons
 815                                            (cons
 816                                             (format
 817                                              (format "%%%ds  %%s%%s  %%s"
 818                                                      maxbuf)
 819                                              (buffer-name elt)
 820                                              (if (buffer-modified-p elt)
 821                                                  "*" " ")
 822                                              (save-excursion
 823                                                (set-buffer elt)
 824                                                (if buffer-read-only "%" " "))
 825                                              (or (buffer-file-name elt) ""))
 826                                             elt)
 827                                            head))))
 828                          (setq tail (cdr tail)))
 829                        (reverse head))))))
 830     (let ((buf (x-popup-menu event menu))
 831           (window (posn-window (event-start event))))
 832       (if buf
 833           (progn
 834             (or (framep window) (select-window window))
 835             (switch-to-buffer buf))))))
 836 \f
 837 ;;; These need to be rewritten for the new scroll bar implementation.
 838
 839 ;;;!! ;; Commands for the scroll bar.
 840 ;;;!!
 841 ;;;!! (defun mouse-scroll-down (click)
 842 ;;;!!   (interactive "@e")
 843 ;;;!!   (scroll-down (1+ (cdr (mouse-coords click)))))
 844 ;;;!!
 845 ;;;!! (defun mouse-scroll-up (click)
 846 ;;;!!   (interactive "@e")
 847 ;;;!!   (scroll-up (1+ (cdr (mouse-coords click)))))
 848 ;;;!!
 849 ;;;!! (defun mouse-scroll-down-full ()
 850 ;;;!!   (interactive "@")
 851 ;;;!!   (scroll-down nil))
 852 ;;;!!
 853 ;;;!! (defun mouse-scroll-up-full ()
 854 ;;;!!   (interactive "@")
 855 ;;;!!   (scroll-up nil))
 856 ;;;!!
 857 ;;;!! (defun mouse-scroll-move-cursor (click)
 858 ;;;!!   (interactive "@e")
 859 ;;;!!   (move-to-window-line (1+ (cdr (mouse-coords click)))))
 860 ;;;!!
 861 ;;;!! (defun mouse-scroll-absolute (event)
 862 ;;;!!   (interactive "@e")
 863 ;;;!!   (let* ((pos (car event))
 864 ;;;!!    (position (car pos))
 865 ;;;!!    (length (car (cdr pos))))
 866 ;;;!!     (if (<= length 0) (setq length 1))
 867 ;;;!!     (let* ((scale-factor (max 1 (/ length (/ 8000000 (buffer-size)))))
 868 ;;;!!      (newpos (* (/ (* (/ (buffer-size) scale-factor)
 869 ;;;!!                       position)
 870 ;;;!!                    length)
 871 ;;;!!                 scale-factor)))
 872 ;;;!!       (goto-char newpos)
 873 ;;;!!       (recenter '(4)))))
 874 ;;;!!
 875 ;;;!! (defun mouse-scroll-left (click)
 876 ;;;!!   (interactive "@e")
 877 ;;;!!   (scroll-left (1+ (car (mouse-coords click)))))
 878 ;;;!!
 879 ;;;!! (defun mouse-scroll-right (click)
 880 ;;;!!   (interactive "@e")
 881 ;;;!!   (scroll-right (1+ (car (mouse-coords click)))))
 882 ;;;!!
 883 ;;;!! (defun mouse-scroll-left-full ()
 884 ;;;!!   (interactive "@")
 885 ;;;!!   (scroll-left nil))
 886 ;;;!!
 887 ;;;!! (defun mouse-scroll-right-full ()
 888 ;;;!!   (interactive "@")
 889 ;;;!!   (scroll-right nil))
 890 ;;;!!
 891 ;;;!! (defun mouse-scroll-move-cursor-horizontally (click)
 892 ;;;!!   (interactive "@e")
 893 ;;;!!   (move-to-column (1+ (car (mouse-coords click)))))
 894 ;;;!!
 895 ;;;!! (defun mouse-scroll-absolute-horizontally (event)
 896 ;;;!!   (interactive "@e")
 897 ;;;!!   (let* ((pos (car event))
 898 ;;;!!    (position (car pos))
 899 ;;;!!    (length (car (cdr pos))))
 900 ;;;!!   (set-window-hscroll (selected-window) 33)))
 901 ;;;!!
 902 ;;;!! (global-set-key [scroll-bar mouse-1] 'mouse-scroll-up)
 903 ;;;!! (global-set-key [scroll-bar mouse-2] 'mouse-scroll-absolute)
 904 ;;;!! (global-set-key [scroll-bar mouse-3] 'mouse-scroll-down)
 905 ;;;!!
 906 ;;;!! (global-set-key [vertical-slider mouse-1] 'mouse-scroll-move-cursor)
 907 ;;;!! (global-set-key [vertical-slider mouse-2] 'mouse-scroll-move-cursor)
 908 ;;;!! (global-set-key [vertical-slider mouse-3] 'mouse-scroll-move-cursor)
 909 ;;;!!
 910 ;;;!! (global-set-key [thumbup mouse-1] 'mouse-scroll-up-full)
 911 ;;;!! (global-set-key [thumbup mouse-2] 'mouse-scroll-up-full)
 912 ;;;!! (global-set-key [thumbup mouse-3] 'mouse-scroll-up-full)
 913 ;;;!!
 914 ;;;!! (global-set-key [thumbdown mouse-1] 'mouse-scroll-down-full)
 915 ;;;!! (global-set-key [thumbdown mouse-2] 'mouse-scroll-down-full)
 916 ;;;!! (global-set-key [thumbdown mouse-3] 'mouse-scroll-down-full)
 917 ;;;!!
 918 ;;;!! (global-set-key [horizontal-scroll-bar mouse-1] 'mouse-scroll-left)
 919 ;;;!! (global-set-key [horizontal-scroll-bar mouse-2]
 920 ;;;!!           'mouse-scroll-absolute-horizontally)
 921 ;;;!! (global-set-key [horizontal-scroll-bar mouse-3] 'mouse-scroll-right)
 922 ;;;!!
 923 ;;;!! (global-set-key [horizontal-slider mouse-1]
 924 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 925 ;;;!! (global-set-key [horizontal-slider mouse-2]
 926 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 927 ;;;!! (global-set-key [horizontal-slider mouse-3]
 928 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 929 ;;;!!
 930 ;;;!! (global-set-key [thumbleft mouse-1] 'mouse-scroll-left-full)
 931 ;;;!! (global-set-key [thumbleft mouse-2] 'mouse-scroll-left-full)
 932 ;;;!! (global-set-key [thumbleft mouse-3] 'mouse-scroll-left-full)
 933 ;;;!!
 934 ;;;!! (global-set-key [thumbright mouse-1] 'mouse-scroll-right-full)
 935 ;;;!! (global-set-key [thumbright mouse-2] 'mouse-scroll-right-full)
 936 ;;;!! (global-set-key [thumbright mouse-3] 'mouse-scroll-right-full)
 937 ;;;!!
 938 ;;;!! (global-set-key [horizontal-scroll-bar S-mouse-2]
 939 ;;;!!           'mouse-split-window-horizontally)
 940 ;;;!! (global-set-key [mode-line S-mouse-2]
 941 ;;;!!           'mouse-split-window-horizontally)
 942 ;;;!! (global-set-key [vertical-scroll-bar S-mouse-2]
 943 ;;;!!           'mouse-split-window)
 944 \f
 945 ;;;!! ;;;;
 946 ;;;!! ;;;; Here are experimental things being tested.  Mouse events
 947 ;;;!! ;;;; are of the form:
 948 ;;;!! ;;;;      ((x y) window screen-part key-sequence timestamp)
 949 ;;;!! ;;
 950 ;;;!! ;;;;
 951 ;;;!! ;;;; Dynamically track mouse coordinates
 952 ;;;!! ;;;;
 953 ;;;!! ;;
 954 ;;;!! ;;(defun track-mouse (event)
 955 ;;;!! ;;  "Track the coordinates, absolute and relative, of the mouse."
 956 ;;;!! ;;  (interactive "@e")
 957 ;;;!! ;;  (while mouse-grabbed
 958 ;;;!! ;;    (let* ((pos (read-mouse-position (selected-screen)))
 959 ;;;!! ;;           (abs-x (car pos))
 960 ;;;!! ;;           (abs-y (cdr pos))
 961 ;;;!! ;;           (relative-coordinate (coordinates-in-window-p
 962 ;;;!! ;;                                 (list (car pos) (cdr pos))
 963 ;;;!! ;;                                 (selected-window))))
 964 ;;;!! ;;      (if (consp relative-coordinate)
 965 ;;;!! ;;          (message "mouse: [%d %d], (%d %d)" abs-x abs-y
 966 ;;;!! ;;                   (car relative-coordinate)
 967 ;;;!! ;;                   (car (cdr relative-coordinate)))
 968 ;;;!! ;;        (message "mouse: [%d %d]" abs-x abs-y)))))
 969 ;;;!!
 970 ;;;!! ;;
 971 ;;;!! ;; Dynamically put a box around the line indicated by point
 972 ;;;!! ;;
 973 ;;;!! ;;
 974 ;;;!! ;;(require 'backquote)
 975 ;;;!! ;;
 976 ;;;!! ;;(defun mouse-select-buffer-line (event)
 977 ;;;!! ;;  (interactive "@e")
 978 ;;;!! ;;  (let ((relative-coordinate
 979 ;;;!! ;;         (coordinates-in-window-p (car event) (selected-window)))
 980 ;;;!! ;;        (abs-y (car (cdr (car event)))))
 981 ;;;!! ;;    (if (consp relative-coordinate)
 982 ;;;!! ;;        (progn
 983 ;;;!! ;;          (save-excursion
 984 ;;;!! ;;            (move-to-window-line (car (cdr relative-coordinate)))
 985 ;;;!! ;;            (x-draw-rectangle
 986 ;;;!! ;;             (selected-screen)
 987 ;;;!! ;;             abs-y 0
 988 ;;;!! ;;             (save-excursion
 989 ;;;!! ;;                 (move-to-window-line (car (cdr relative-coordinate)))
 990 ;;;!! ;;                 (end-of-line)
 991 ;;;!! ;;                 (push-mark nil t)
 992 ;;;!! ;;                 (beginning-of-line)
 993 ;;;!! ;;                 (- (region-end) (region-beginning))) 1))
 994 ;;;!! ;;          (sit-for 1)
 995 ;;;!! ;;          (x-erase-rectangle (selected-screen))))))
 996 ;;;!! ;;
 997 ;;;!! ;;(defvar last-line-drawn nil)
 998 ;;;!! ;;(defvar begin-delim "[^ \t]")
 999 ;;;!! ;;(defvar end-delim   "[^ \t]")
1000 ;;;!! ;;
1001 ;;;!! ;;(defun mouse-boxing (event)
1002 ;;;!! ;;  (interactive "@e")
1003 ;;;!! ;;  (save-excursion
1004 ;;;!! ;;    (let ((screen (selected-screen)))
1005 ;;;!! ;;      (while (= (x-mouse-events) 0)
1006 ;;;!! ;;        (let* ((pos (read-mouse-position screen))
1007 ;;;!! ;;               (abs-x (car pos))
1008 ;;;!! ;;               (abs-y (cdr pos))
1009 ;;;!! ;;               (relative-coordinate
1010 ;;;!! ;;                (coordinates-in-window-p (` ((, abs-x) (, abs-y)))
1011 ;;;!! ;;                                         (selected-window)))
1012 ;;;!! ;;               (begin-reg nil)
1013 ;;;!! ;;               (end-reg nil)
1014 ;;;!! ;;               (end-column nil)
1015 ;;;!! ;;               (begin-column nil))
1016 ;;;!! ;;          (if (and (consp relative-coordinate)
1017 ;;;!! ;;                   (or (not last-line-drawn)
1018 ;;;!! ;;                       (not (= last-line-drawn abs-y))))
1019 ;;;!! ;;              (progn
1020 ;;;!! ;;                (move-to-window-line (car (cdr relative-coordinate)))
1021 ;;;!! ;;                (if (= (following-char) 10)
1022 ;;;!! ;;                    ()
1023 ;;;!! ;;                  (progn
1024 ;;;!! ;;                    (setq begin-reg (1- (re-search-forward end-delim)))
1025 ;;;!! ;;                    (setq begin-column (1- (current-column)))
1026 ;;;!! ;;                    (end-of-line)
1027 ;;;!! ;;                    (setq end-reg (1+ (re-search-backward begin-delim)))
1028 ;;;!! ;;                    (setq end-column (1+ (current-column)))
1029 ;;;!! ;;                    (message "%s" (buffer-substring begin-reg end-reg))
1030 ;;;!! ;;                    (x-draw-rectangle screen
1031 ;;;!! ;;                                      (setq last-line-drawn abs-y)
1032 ;;;!! ;;                                      begin-column
1033 ;;;!! ;;                                      (- end-column begin-column) 1))))))))))
1034 ;;;!! ;;
1035 ;;;!! ;;(defun mouse-erase-box ()
1036 ;;;!! ;;  (interactive)
1037 ;;;!! ;;  (if last-line-drawn
1038 ;;;!! ;;      (progn
1039 ;;;!! ;;        (x-erase-rectangle (selected-screen))
1040 ;;;!! ;;        (setq last-line-drawn nil))))
1041 ;;;!!
1042 ;;;!! ;;; (defun test-x-rectangle ()
1043 ;;;!! ;;;   (use-local-mouse-map (setq rectangle-test-map (make-sparse-keymap)))
1044 ;;;!! ;;;   (define-key rectangle-test-map mouse-motion-button-left 'mouse-boxing)
1045 ;;;!! ;;;   (define-key rectangle-test-map mouse-button-left-up 'mouse-erase-box))
1046 ;;;!!
1047 ;;;!! ;;
1048 ;;;!! ;; Here is how to do double clicking in lisp.  About to change.
1049 ;;;!! ;;
1050 ;;;!!
1051 ;;;!! (defvar double-start nil)
1052 ;;;!! (defconst double-click-interval 300
1053 ;;;!!   "Max ticks between clicks")
1054 ;;;!!
1055 ;;;!! (defun double-down (event)
1056 ;;;!!   (interactive "@e")
1057 ;;;!!   (if double-start
1058 ;;;!!       (let ((interval (- (nth 4 event) double-start)))
1059 ;;;!!   (if (< interval double-click-interval)
1060 ;;;!!       (progn
1061 ;;;!!         (backward-up-list 1)
1062 ;;;!!         ;;      (message "Interval %d" interval)
1063 ;;;!!         (sleep-for 1)))
1064 ;;;!!   (setq double-start nil))
1065 ;;;!!     (setq double-start (nth 4 event))))
1066 ;;;!!
1067 ;;;!! (defun double-up (event)
1068 ;;;!!   (interactive "@e")
1069 ;;;!!   (and double-start
1070 ;;;!!        (> (- (nth 4 event ) double-start) double-click-interval)
1071 ;;;!!        (setq double-start nil)))
1072 ;;;!!
1073 ;;;!! ;;; (defun x-test-doubleclick ()
1074 ;;;!! ;;;   (use-local-mouse-map (setq doubleclick-test-map (make-sparse-keymap)))
1075 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left 'double-down)
1076 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left-up 'double-up))
1077 ;;;!!
1078 ;;;!! ;;
1079 ;;;!! ;; This scrolls while button is depressed.  Use preferable in scroll bar.
1080 ;;;!! ;;
1081 ;;;!!
1082 ;;;!! (defvar scrolled-lines 0)
1083 ;;;!! (defconst scroll-speed 1)
1084 ;;;!!
1085 ;;;!! (defun incr-scroll-down (event)
1086 ;;;!!   (interactive "@e")
1087 ;;;!!   (setq scrolled-lines 0)
1088 ;;;!!   (incremental-scroll scroll-speed))
1089 ;;;!!
1090 ;;;!! (defun incr-scroll-up (event)
1091 ;;;!!   (interactive "@e")
1092 ;;;!!   (setq scrolled-lines 0)
1093 ;;;!!   (incremental-scroll (- scroll-speed)))
1094 ;;;!!
1095 ;;;!! (defun incremental-scroll (n)
1096 ;;;!!   (while (= (x-mouse-events) 0)
1097 ;;;!!     (setq scrolled-lines (1+ (* scroll-speed scrolled-lines)))
1098 ;;;!!     (scroll-down n)
1099 ;;;!!     (sit-for 300 t)))
1100 ;;;!!
1101 ;;;!! (defun incr-scroll-stop (event)
1102 ;;;!!   (interactive "@e")
1103 ;;;!!   (message "Scrolled %d lines" scrolled-lines)
1104 ;;;!!   (setq scrolled-lines 0)
1105 ;;;!!   (sleep-for 1))
1106 ;;;!!
1107 ;;;!! ;;; (defun x-testing-scroll ()
1108 ;;;!! ;;;   (let ((scrolling-map (function mouse-vertical-scroll-bar-prefix)))
1109 ;;;!! ;;;     (define-key scrolling-map mouse-button-left 'incr-scroll-down)
1110 ;;;!! ;;;     (define-key scrolling-map mouse-button-right 'incr-scroll-up)
1111 ;;;!! ;;;     (define-key scrolling-map mouse-button-left-up 'incr-scroll-stop)
1112 ;;;!! ;;;     (define-key scrolling-map mouse-button-right-up 'incr-scroll-stop)))
1113 ;;;!!
1114 ;;;!! ;;
1115 ;;;!! ;; Some playthings suitable for picture mode?  They need work.
1116 ;;;!! ;;
1117 ;;;!!
1118 ;;;!! (defun mouse-kill-rectangle (event)
1119 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1120 ;;;!!   (interactive "@e")
1121 ;;;!!   (let ((point-save (point)))
1122 ;;;!!     (save-excursion
1123 ;;;!!       (mouse-set-point event)
1124 ;;;!!       (push-mark nil t)
1125 ;;;!!       (if (> point-save (point))
1126 ;;;!!     (kill-rectangle (point) point-save)
1127 ;;;!!   (kill-rectangle point-save (point))))))
1128 ;;;!!
1129 ;;;!! (defun mouse-open-rectangle (event)
1130 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1131 ;;;!!   (interactive "@e")
1132 ;;;!!   (let ((point-save (point)))
1133 ;;;!!     (save-excursion
1134 ;;;!!       (mouse-set-point event)
1135 ;;;!!       (push-mark nil t)
1136 ;;;!!       (if (> point-save (point))
1137 ;;;!!     (open-rectangle (point) point-save)
1138 ;;;!!   (open-rectangle point-save (point))))))
1139 ;;;!!
1140 ;;;!! ;; Must be a better way to do this.
1141 ;;;!!
1142 ;;;!! (defun mouse-multiple-insert (n char)
1143 ;;;!!   (while (> n 0)
1144 ;;;!!     (insert char)
1145 ;;;!!     (setq n (1- n))))
1146 ;;;!!
1147 ;;;!! ;; What this could do is not finalize until button was released.
1148 ;;;!!
1149 ;;;!! (defun mouse-move-text (event)
1150 ;;;!!   "Move text from point to cursor position, inserting spaces."
1151 ;;;!!   (interactive "@e")
1152 ;;;!!   (let* ((relative-coordinate
1153 ;;;!!     (coordinates-in-window-p (car event) (selected-window))))
1154 ;;;!!     (if (consp relative-coordinate)
1155 ;;;!!   (cond ((> (current-column) (car relative-coordinate))
1156 ;;;!!          (delete-char
1157 ;;;!!           (- (car relative-coordinate) (current-column))))
1158 ;;;!!         ((< (current-column) (car relative-coordinate))
1159 ;;;!!          (mouse-multiple-insert
1160 ;;;!!           (- (car relative-coordinate) (current-column)) " "))
1161 ;;;!!         ((= (current-column) (car relative-coordinate)) (ding))))))
1162 \f
1163 ;; Choose a completion with the mouse.
1164
1165 ;; Delete the longest partial match for STRING
1166 ;; that can be found before POINT.
1167 (defun mouse-delete-max-match (string)
1168   (let ((len (min (length string)
1169                   (- (point-max) (point-min)))))
1170     (goto-char (max (point-min) (- (point) (length string))))
1171     (while (and (> len 0)
1172                 (let ((tail (buffer-substring (point)
1173                                               (+ (point) len))))
1174                   (not (string= tail (substring string 0 len)))))
1175       (setq len (1- len))
1176       (forward-char 1))
1177     (delete-char len)))
1178
1179 (defun mouse-choose-completion (event)
1180   "Click on an alternative in the `*Completions*' buffer to choose it."
1181   (interactive "e")
1182   (let ((buffer (window-buffer))
1183         choice)
1184     (save-excursion
1185       (set-buffer (window-buffer (posn-window (event-start event))))
1186       (save-excursion
1187         (goto-char (posn-point (event-start event)))
1188         (skip-chars-backward "^ \t\n")
1189         (let ((beg (point)))
1190           (skip-chars-forward "^ \t\n")
1191           (setq choice (buffer-substring beg (point))))))
1192     (set-buffer buffer)
1193     (mouse-delete-max-match choice)
1194     (insert choice)
1195     (and (equal buffer (window-buffer (minibuffer-window)))
1196          (minibuffer-complete-and-exit))))
1197 \f
1198 ;; Font selection.
1199
1200 (defun font-menu-add-default ()
1201   (let* ((default (cdr (assq 'font (frame-parameters (selected-frame)))))
1202          (font-alist x-fixed-font-alist)
1203          (elt (or (assoc "Misc" font-alist) (nth 1 font-alist))))
1204     (if (assoc "Default" elt)
1205         (delete (assoc "Default" elt) elt))
1206     (setcdr elt
1207             (cons (list "Default"
1208                         (cdr (assq 'font (frame-parameters (selected-frame)))))
1209                   (cdr elt)))))
1210
1211 (defvar x-fixed-font-alist
1212   '("Font menu"
1213     ("Misc"
1214      ("6x10" "-misc-fixed-medium-r-normal--10-100-75-75-c-60-*-1")
1215      ("6x12" "-misc-fixed-medium-r-semicondensed--12-110-75-75-c-60-*-1")
1216      ("6x13" "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-*-1")
1217      ("lucida 13"
1218       "-b&h-lucidatypewriter-medium-r-normal-sans-0-0-0-0-m-0-*-1")
1219      ("7x13" "-misc-fixed-medium-r-normal--13-120-75-75-c-70-*-1")
1220      ("7x14" "-misc-fixed-medium-r-normal--14-130-75-75-c-70-*-1")
1221      ("9x15" "-misc-fixed-medium-r-normal--15-140-*-*-c-*-*-1")
1222      ("")
1223      ("clean 8x8" "-schumacher-clean-medium-r-normal--*-80-*-*-c-*-*-1")
1224      ("clean 8x14" "-schumacher-clean-medium-r-normal--*-140-*-*-c-*-*-1")
1225      ("clean 8x10" "-schumacher-clean-medium-r-normal--*-100-*-*-c-*-*-1")
1226      ("clean 8x16" "-schumacher-clean-medium-r-normal--*-160-*-*-c-*-*-1")
1227      ("")
1228      ("sony 8x16" "-sony-fixed-medium-r-normal--16-120-100-100-c-80-*-1")
1229      ("")
1230      ("fixed" "fixed")
1231      ("10x20" "10x20")
1232      ("11x18" "11x18")
1233      ("12x24" "12x24"))
1234 ;;; We don't seem to have these; who knows what they are.
1235 ;;;    ("fg-18" "fg-18")
1236 ;;;    ("fg-25" "fg-25")
1237 ;;;    ("lucidasanstypewriter-12" "lucidasanstypewriter-12")
1238 ;;;    ("lucidasanstypewriter-bold-14" "lucidasanstypewriter-bold-14")
1239 ;;;    ("lucidasanstypewriter-bold-24" "lucidasanstypewriter-bold-24")
1240 ;;;    ("lucidatypewriter-bold-r-24" "-b&h-lucidatypewriter-bold-r-normal-sans-24-240-75-75-m-140-iso8859-1")
1241 ;;;    ("fixed-medium-20" "-misc-fixed-medium-*-*-*-20-*-*-*-*-*-*-*")
1242     ("Courier"
1243      ("8" "-adobe-courier-medium-r-normal--*-80-*-*-m-*-iso8859-1")
1244      ("10" "-adobe-courier-medium-r-normal--*-100-*-*-m-*-iso8859-1")
1245      ("12" "-adobe-courier-medium-r-normal--*-120-*-*-m-*-iso8859-1")
1246      ("14" "-adobe-courier-medium-r-normal--*-140-*-*-m-*-iso8859-1")
1247      ("18" "-adobe-courier-medium-r-normal--*-180-*-*-m-*-iso8859-1")
1248      ("24" "-adobe-courier-medium-r-normal--*-240-*-*-m-*-iso8859-1")
1249      ("8 bold" "-adobe-courier-bold-r-normal--*-80-*-*-m-*-iso8859-1")
1250      ("10 bold" "-adobe-courier-bold-r-normal--*-100-*-*-m-*-iso8859-1")
1251      ("12 bold" "-adobe-courier-bold-r-normal--*-120-*-*-m-*-iso8859-1")
1252      ("14 bold" "-adobe-courier-bold-r-normal--*-140-*-*-m-*-iso8859-1")
1253      ("18 bold" "-adobe-courier-bold-r-normal--*-180-*-*-m-*-iso8859-1")
1254      ("24 bold" "-adobe-courier-bold-r-normal--*-240-*-*-m-*-iso8859-1")
1255      ("8 slant" "-adobe-courier-medium-o-normal--*-80-*-*-m-*-iso8859-1")
1256      ("10 slant" "-adobe-courier-medium-o-normal--*-100-*-*-m-*-iso8859-1")
1257      ("12 slant" "-adobe-courier-medium-o-normal--*-120-*-*-m-*-iso8859-1")
1258      ("14 slant" "-adobe-courier-medium-o-normal--*-140-*-*-m-*-iso8859-1")
1259      ("18 slant" "-adobe-courier-medium-o-normal--*-180-*-*-m-*-iso8859-1")
1260      ("24 slant" "-adobe-courier-medium-o-normal--*-240-*-*-m-*-iso8859-1")
1261      ("8 bold slant" "-adobe-courier-bold-o-normal--*-80-*-*-m-*-iso8859-1")
1262      ("10 bold slant" "-adobe-courier-bold-o-normal--*-100-*-*-m-*-iso8859-1")
1263      ("12 bold slant" "-adobe-courier-bold-o-normal--*-120-*-*-m-*-iso8859-1")
1264      ("14 bold slant" "-adobe-courier-bold-o-normal--*-140-*-*-m-*-iso8859-1")
1265      ("18 bold slant" "-adobe-courier-bold-o-normal--*-180-*-*-m-*-iso8859-1")
1266      ("24 bold slant" "-adobe-courier-bold-o-normal--*-240-*-*-m-*-iso8859-1"))
1267     )
1268   "X fonts suitable for use in Emacs.")
1269
1270 (defun mouse-set-font (&optional font)
1271   "Select an emacs font from a list of known good fonts"
1272   (interactive
1273    (x-popup-menu last-nonmenu-event x-fixed-font-alist))
1274   (if font
1275       (progn (modify-frame-parameters (selected-frame)
1276                                       (list (cons 'font font)))
1277              ;; Update some standard faces too.
1278              (set-face-font 'bold nil (selected-frame))
1279              (make-face-bold 'bold (selected-frame) t)
1280              (set-face-font 'italic nil (selected-frame))
1281              (make-face-italic 'italic (selected-frame) t)
1282              (set-face-font 'bold-italic nil (selected-frame))
1283              (make-face-bold-italic 'bold-italic (selected-frame) t)
1284              ;; Update any nonstandard faces whose definition is
1285              ;; "a bold/italic/bold&italic version of the frame's font".
1286              (let ((rest global-face-data))
1287                (while rest
1288                  (condition-case nil
1289                      (if (listp (face-font (cdr (car rest))))
1290                          (let ((bold (memq 'bold (face-font (cdr (car rest)))))
1291                                (italic (memq 'italic (face-font (cdr (car rest))))))
1292                            (if (and bold italic)
1293                                (make-face-bold-italic (car (car rest)) (selected-frame))
1294                              (if bold
1295                                  (make-face-bold (car (car rest)) (selected-frame))
1296                                (if italic
1297                                    (make-face-italic (car (car rest)) (selected-frame)))))))
1298                    (error nil))
1299                  (setq rest (cdr rest))))
1300              )))
1301 \f
1302 ;;; Bindings for mouse commands.
1303
1304 (define-key global-map [down-mouse-1] 'mouse-drag-region)
1305 (global-set-key [mouse-1]       'mouse-set-point)
1306 (global-set-key [drag-mouse-1]  'mouse-set-region)
1307
1308 ;; These are tested for in mouse-drag-region.
1309 (global-set-key [double-mouse-1] 'mouse-set-point)
1310 (global-set-key [triple-mouse-1] 'mouse-set-point)
1311
1312 (global-set-key [mouse-2]       'mouse-yank-at-click)
1313 (global-set-key [mouse-3]       'mouse-save-then-kill)
1314
1315 ;; By binding these to down-going events, we let the user use the up-going
1316 ;; event to make the selection, saving a click.
1317 (global-set-key [C-down-mouse-1]        'mouse-buffer-menu)
1318 (global-set-key [C-down-mouse-3]        'mouse-set-font)
1319
1320 ;; Replaced with dragging mouse-1
1321 ;; (global-set-key [S-mouse-1]  'mouse-set-mark)
1322
1323 (global-set-key [mode-line mouse-1] 'mouse-delete-other-windows)
1324 (global-set-key [mode-line mouse-3] 'mouse-delete-window)
1325 (global-set-key [mode-line S-mouse-2] 'mouse-split-window-horizontally)
1326 \f
1327 ;; Define the mouse help menu tree.
1328
1329 (defvar help-menu-map '(keymap "Help"))
1330 (global-set-key [C-down-mouse-2] help-menu-map)
1331
1332 (defvar help-apropos-map (make-sparse-keymap "Is there a command that..."))
1333 (defvar help-keys-map (make-sparse-keymap "Key Commands <==> Functions"))
1334 (defvar help-manual-map (make-sparse-keymap "Manual and tutorial"))
1335 (defvar help-misc-map (make-sparse-keymap "Odds and ends"))
1336 (defvar help-modes-map (make-sparse-keymap "Modes"))
1337 (defvar help-admin-map (make-sparse-keymap "Administrivia"))
1338
1339 (define-key help-menu-map [apropos]
1340   (cons "@Is there a command that..." help-apropos-map))
1341 (define-key help-menu-map [keys]
1342   (cons "@Key Commands <==> Functions" help-keys-map))
1343 (define-key help-menu-map [manuals]
1344   (cons "@Manual and tutorial" help-manual-map))
1345 (define-key help-menu-map [misc]
1346   (cons "@Odds and ends" help-misc-map))
1347 (define-key help-menu-map [modes]
1348   (cons "@Modes" help-modes-map))
1349 (define-key help-menu-map [admin]
1350   (cons "@Administrivia" help-admin-map))
1351
1352 (define-key help-apropos-map "c" '("Command Apropos" . command-apropos))
1353 (define-key help-apropos-map "a" '("Apropos" . apropos))
1354
1355 (define-key help-keys-map "b"
1356   '("List all keystroke commands" . describe-bindings))
1357 (define-key help-keys-map "c"
1358   '("Describe key briefly" . describe-key-briefly))
1359 (define-key help-keys-map "k"
1360   '("Describe key verbose" . describe-key))
1361 (define-key help-keys-map "f"
1362   '("Describe Lisp function" . describe-function))
1363 (define-key help-keys-map "w"
1364   '("Where is this command" . where-is))
1365
1366 (define-key help-manual-map "i" '("Info system" . info))
1367 (define-key help-manual-map "t"
1368   '("Invoke Emacs tutorial" . help-with-tutorial))
1369
1370 (define-key help-misc-map "l" '("Last 100 Keystrokes" . view-lossage))
1371 (define-key help-misc-map "s" '("Describe syntax table" . describe-syntax))
1372
1373 (define-key help-modes-map "m"
1374   '("Describe current major mode" . describe-mode))
1375 (define-key help-modes-map "b"
1376   '("List all keystroke commands" . describe-bindings))
1377
1378 (define-key help-admin-map "n"
1379   '("View Emacs news" . view-emacs-news))
1380 (define-key help-admin-map "l"
1381   '("View Emacs copying conditions" . describe-copying))
1382 (define-key help-admin-map "d"
1383   '("Describe distribution" . describe-distribution))
1384 (define-key help-admin-map "w"
1385   '("Describe (non)warranty" . describe-no-warranty))
1386
1387 (provide 'mouse)
1388
1389 ;;; mouse.el ends here