lisp/mouse.el

   1 ;;; mouse.el --- window system-independent mouse support.
   2
   3 ;;; Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   4
   5 ;; Maintainer: FSF
   6 ;; Keywords: hardware
   7
   8 ;;; This file is part of GNU Emacs.
   9
  10 ;;; GNU Emacs is free software; you can redistribute it and/or modify
  11 ;;; it under the terms of the GNU General Public License as published by
  12 ;;; the Free Software Foundation; either version 2, or (at your option)
  13 ;;; any later version.
  14
  15 ;;; GNU Emacs is distributed in the hope that it will be useful,
  16 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 ;;; GNU General Public License for more details.
  19
  20 ;;; You should have received a copy of the GNU General Public License
  21 ;;; along with GNU Emacs; see the file COPYING.  If not, write to
  22 ;;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  23
  24 ;;; Commentary:
  25
  26 ;; This package provides various useful commands (including help
  27 ;; system access) through the mouse.  All this code assumes that mouse
  28 ;; interpretation has been abstracted into Emacs input events.
  29 ;;
  30 ;; The code is rather X-dependent.
  31
  32 ;;; Code:
  33
  34 ;;; Utility functions.
  35
  36 ;;; Indent track-mouse like progn.
  37 (put 'track-mouse 'lisp-indent-function 0)
  38
  39 (defvar mouse-yank-at-point nil
  40   "*If non-nil, mouse yank commands yank at point instead of at click.")
  41 \f
  42 (defun mouse-minibuffer-check (event)
  43   (let ((w (posn-window (event-start event))))
  44     (and (window-minibuffer-p w)
  45          (not (minibuffer-window-active-p w))
  46          (error "Minibuffer window is not active"))))
  47
  48 (defun mouse-delete-window (click)
  49   "Delete the window you click on.
  50 This must be bound to a mouse click."
  51   (interactive "e")
  52   (mouse-minibuffer-check click)
  53   (delete-window (posn-window (event-start click))))
  54
  55 (defun mouse-select-window (click)
  56   "Select the window clicked on; don't move point."
  57   (interactive "e")
  58   (mouse-minibuffer-check click)
  59   (let ((oframe (selected-frame))
  60         (frame (window-frame (posn-window (event-start click)))))
  61     (select-window (posn-window (event-start click)))
  62     (raise-frame frame)
  63     (select-frame frame)
  64     (or (eq frame oframe)
  65         (set-mouse-position (selected-frame) (1- (frame-width)) 0))
  66     (unfocus-frame)))
  67
  68 (defun mouse-tear-off-window (click)
  69   "Delete the window clicked on, and create a new frame displaying its buffer."
  70   (interactive "e")
  71   (mouse-minibuffer-check click)
  72   (let* ((window (posn-window (event-start click)))
  73          (buf (window-buffer window))
  74          (frame (make-frame)))
  75     (select-frame frame)
  76     (switch-to-buffer buf)
  77     (delete-window window)))
  78
  79 (defun mouse-delete-other-windows ()
  80   "Delete all window except the one you click on."
  81   (interactive "@")
  82   (delete-other-windows))
  83
  84 (defun mouse-split-window-vertically (click)
  85   "Select Emacs window mouse is on, then split it vertically in half.
  86 The window is split at the line clicked on.
  87 This command must be bound to a mouse click."
  88   (interactive "@e")
  89   (mouse-minibuffer-check click)
  90   (let ((start (event-start click)))
  91     (select-window (posn-window start))
  92     (let ((new-height (1+ (cdr (posn-col-row (event-end click)))))
  93           (first-line window-min-height)
  94           (last-line (- (window-height) window-min-height)))
  95       (if (< last-line first-line)
  96           (error "window too short to split")
  97         (split-window-vertically
  98          (min (max new-height first-line) last-line))))))
  99
 100 (defun mouse-split-window-horizontally (click)
 101   "Select Emacs window mouse is on, then split it horizontally in half.
 102 The window is split at the column clicked on.
 103 This command must be bound to a mouse click."
 104   (interactive "@e")
 105   (mouse-minibuffer-check click)
 106   (let ((start (event-start click)))
 107     (select-window (posn-window start))
 108     (let ((new-width (1+ (car (posn-col-row (event-end click)))))
 109           (first-col window-min-width)
 110           (last-col (- (window-width) window-min-width)))
 111       (if (< last-col first-col)
 112           (error "window too narrow to split")
 113         (split-window-horizontally
 114          (min (max new-width first-col) last-col))))))
 115
 116 (defun mouse-set-point (event)
 117   "Move point to the position clicked on with the mouse.
 118 This should be bound to a mouse click event type."
 119   (interactive "e")
 120   (mouse-minibuffer-check event)
 121   ;; Use event-end in case called from mouse-drag-region.
 122   ;; If EVENT is a click, event-end and event-start give same value.
 123   (let ((posn (event-end event)))
 124     (select-window (posn-window posn))
 125     (if (numberp (posn-point posn))
 126         (goto-char (posn-point posn)))))
 127
 128 (defun mouse-set-region (click)
 129   "Set the region to the text dragged over, and copy to kill ring.
 130 This should be bound to a mouse drag event."
 131   (interactive "e")
 132   (mouse-minibuffer-check click)
 133   (let ((posn (event-start click))
 134         (end (event-end click)))
 135     (select-window (posn-window posn))
 136     (if (numberp (posn-point posn))
 137         (goto-char (posn-point posn)))
 138     ;; If mark is highlighted, no need to bounce the cursor.
 139     (or (and transient-mark-mode
 140              (eq (framep (selected-frame)) 'x))
 141         (sit-for 1))
 142     (push-mark)
 143     (set-mark (point))
 144     (if (numberp (posn-point end))
 145         (goto-char (posn-point end)))
 146     ;; Don't set this-command to kill-region, so that a following
 147     ;; C-w will not double the text in the kill ring.
 148     (let (this-command)
 149       (copy-region-as-kill (mark) (point)))))
 150
 151 (defvar mouse-scroll-delay 0.25
 152   "*The pause between scroll steps caused by mouse drags, in seconds.
 153 If you drag the mouse beyond the edge of a window, Emacs scrolls the
 154 window to bring the text beyond that edge into view, with a delay of
 155 this many seconds between scroll steps.  Scrolling stops when you move
 156 the mouse back into the window, or release the button.
 157 This variable's value may be non-integral.
 158 Setting this to zero causes Emacs to scroll as fast as it can.")
 159
 160 (defun mouse-scroll-subr (jump &optional overlay start)
 161   "Scroll the selected window JUMP lines at a time, until new input arrives.
 162 If OVERLAY is an overlay, let it stretch from START to the far edge of
 163 the newly visible text.
 164 Upon exit, point is at the far edge of the newly visible text."
 165   (while (progn
 166            (goto-char (window-start))
 167            (if (not (zerop (vertical-motion jump)))
 168                (progn
 169                  (set-window-start (selected-window) (point))
 170                  (if (natnump jump)
 171                      (progn
 172                        (goto-char (window-end (selected-window)))
 173                        ;; window-end doesn't reflect the window's new
 174                        ;; start position until the next redisplay.  Hurrah.
 175                        (vertical-motion (1- jump)))
 176                    (goto-char (window-start (selected-window))))
 177                  (if overlay
 178                      (move-overlay overlay start (point)))
 179                  (if (not (eobp))
 180                      (sit-for mouse-scroll-delay))))))
 181   (point))
 182
 183 (defvar mouse-drag-overlay (make-overlay 1 1))
 184 (overlay-put mouse-drag-overlay 'face 'region)
 185
 186 (defvar mouse-selection-click-count 0)
 187
 188 (defun mouse-drag-region (start-event)
 189   "Set the region to the text that the mouse is dragged over.
 190 Highlight the drag area as you move the mouse.
 191 This must be bound to a button-down mouse event.
 192 In Transient Mark mode, the highlighting remains once you
 193 release the mouse button.  Otherwise, it does not."
 194   (interactive "e")
 195   (mouse-minibuffer-check start-event)
 196   (let* ((start-posn (event-start start-event))
 197          (start-point (posn-point start-posn))
 198          (start-window (posn-window start-posn))
 199          (start-frame (window-frame start-window))
 200          (bounds (window-edges start-window))
 201          (top (nth 1 bounds))
 202          (bottom (if (window-minibuffer-p start-window)
 203                      (nth 3 bounds)
 204                    ;; Don't count the mode line.
 205                    (1- (nth 3 bounds))))
 206          (click-count (1- (event-click-count start-event))))
 207     (setq mouse-selection-click-count click-count)
 208     (mouse-set-point start-event)
 209     (let ((range (mouse-start-end start-point start-point click-count)))
 210       (move-overlay mouse-drag-overlay (car range) (nth 1 range)
 211                     (window-buffer start-window)))
 212     (deactivate-mark)
 213     (let (event end end-point)
 214       (track-mouse
 215         (while (progn
 216                  (setq event (read-event))
 217                  (or (mouse-movement-p event)
 218                      (eq (car-safe event) 'switch-frame)))
 219           (if (eq (car-safe event) 'switch-frame)
 220               nil
 221             (setq end (event-end event)
 222                   end-point (posn-point end))
 223
 224             (cond
 225
 226              ;; Ignore switch-frame events.
 227              ((eq (car-safe event) 'switch-frame))
 228
 229              ;; Are we moving within the original window?
 230              ((and (eq (posn-window end) start-window)
 231                    (integer-or-marker-p end-point))
 232               (goto-char end-point)
 233               (let ((range (mouse-start-end start-point (point) click-count)))
 234                 (move-overlay mouse-drag-overlay (car range) (nth 1 range))))
 235
 236              (t
 237               (let ((mouse-row (cdr (cdr (mouse-position)))))
 238                 (cond
 239                  ((null mouse-row))
 240                  ((< mouse-row top)
 241                   (mouse-scroll-subr
 242                    (- mouse-row top) mouse-drag-overlay start-point))
 243                  ((and (not (eobp))
 244                        (>= mouse-row bottom))
 245                   (mouse-scroll-subr (1+ (- mouse-row bottom))
 246                                      mouse-drag-overlay start-point)))))))))
 247
 248       (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 249                (eq (posn-window (event-end event)) start-window)
 250                (numberp (posn-point (event-end event))))
 251           (let ((fun (key-binding (vector (car event)))))
 252             (if (memq fun '(mouse-set-region mouse-set-point))
 253                 (if (not (= (overlay-start mouse-drag-overlay)
 254                             (overlay-end mouse-drag-overlay)))
 255                     (let (this-command)
 256                       (push-mark (overlay-start mouse-drag-overlay) t t)
 257                       (goto-char (overlay-end mouse-drag-overlay))
 258                       (copy-region-as-kill (point) (mark t)))
 259                   (goto-char (overlay-end mouse-drag-overlay))
 260                   (setq this-command 'mouse-set-point))
 261               (if (fboundp fun)
 262                   (funcall fun event)))))
 263       (delete-overlay mouse-drag-overlay))))
 264 \f
 265 ;; Commands to handle xterm-style multiple clicks.
 266
 267 (defun mouse-skip-word (dir)
 268   "Skip over word, over whitespace, or over identical punctuation.
 269 If DIR is positive skip forward; if negative, skip backward."
 270   (let* ((char (following-char))
 271          (syntax (char-to-string (char-syntax char))))
 272     (if (or (string= syntax "w") (string= syntax " "))
 273         (if (< dir 0)
 274             (skip-syntax-backward syntax)
 275           (skip-syntax-forward syntax))
 276       (if (< dir 0)
 277           (while (and (not (bobp)) (= (preceding-char) char))
 278             (forward-char -1))
 279         (while (and (not (eobp)) (= (following-char) char))
 280           (forward-char 1))))))
 281
 282 ;; Return a list of region bounds based on START and END according to MODE.
 283 ;; If MODE is 0 then set point to (min START END), mark to (max START END).
 284 ;; If MODE is 1 then set point to start of word at (min START END),
 285 ;; mark to end of word at (max START END).
 286 ;; If MODE is 2 then do the same for lines.
 287 (defun mouse-start-end (start end mode)
 288   (if (> start end)
 289       (let ((temp start))
 290         (setq start end
 291               end temp)))
 292   (setq mode (mod mode 3))
 293   (cond ((= mode 0)
 294          (list start end))
 295         ((and (= mode 1)
 296               (= start end)
 297               (char-after start)
 298               (= (char-syntax (char-after start)) ?\())
 299          (list start
 300                (save-excursion
 301                  (goto-char start)
 302                  (forward-sexp 1)
 303                  (point))))
 304         ((and (= mode 1)
 305               (= start end)
 306               (char-after start)
 307               (= (char-syntax (char-after start)) ?\)))
 308          (list (save-excursion
 309                  (goto-char (1+ start))
 310                  (backward-sexp 1)
 311                  (point))
 312                (1+ start)))
 313         ((= mode 1)
 314          (list (save-excursion
 315                  (goto-char start)
 316                  (mouse-skip-word -1)
 317                  (point))
 318                (save-excursion
 319                  (goto-char end)
 320                  (mouse-skip-word 1)
 321                  (point))))
 322         ((= mode 2)
 323          (list (save-excursion
 324                  (goto-char start)
 325                  (beginning-of-line 1)
 326                  (point))
 327                (save-excursion
 328                  (goto-char end)
 329                  (forward-line 1)
 330                  (point))))))
 331 \f
 332 ;; Subroutine: set the mark where CLICK happened,
 333 ;; but don't do anything else.
 334 (defun mouse-set-mark-fast (click)
 335   (mouse-minibuffer-check click)
 336   (let ((posn (event-start click)))
 337     (select-window (posn-window posn))
 338     (if (numberp (posn-point posn))
 339         (push-mark (posn-point posn) t t))))
 340
 341 ;; Momentarily show where the mark is, if highlighting doesn't show it.
 342 (defun mouse-show-mark ()
 343   (or transient-mark-mode
 344       (save-excursion
 345         (goto-char (mark t))
 346         (sit-for 1))))
 347
 348 (defun mouse-set-mark (click)
 349   "Set mark at the position clicked on with the mouse.
 350 Display cursor at that position for a second.
 351 This must be bound to a mouse click."
 352   (interactive "e")
 353   (let ((point-save (point)))
 354     (unwind-protect
 355         (progn (mouse-set-point click)
 356                (push-mark nil t t)
 357                (or transient-mark-mode
 358                    (sit-for 1)))
 359       (goto-char point-save))))
 360
 361 (defun mouse-kill (click)
 362   "Kill the region between point and the mouse click.
 363 The text is saved in the kill ring, as with \\[kill-region]."
 364   (interactive "e")
 365   (mouse-minibuffer-check click)
 366   (let* ((posn (event-start click))
 367          (click-posn (posn-point posn)))
 368     (select-window (posn-window posn))
 369     (if (numberp click-posn)
 370         (kill-region (min (point) click-posn)
 371                      (max (point) click-posn)))))
 372
 373 (defun mouse-yank-at-click (click arg)
 374   "Insert the last stretch of killed text at the position clicked on.
 375 Also move point to one end of the text thus inserted (normally the end).
 376 Prefix arguments are interpreted as with \\[yank].
 377 If `mouse-yank-at-point' is non-nil, insert at point
 378 regardless of where you click."
 379   (interactive "e\nP")
 380   (or mouse-yank-at-point (mouse-set-point click))
 381   (setq this-command 'yank)
 382   (yank arg))
 383
 384 (defun mouse-kill-ring-save (click)
 385   "Copy the region between point and the mouse click in the kill ring.
 386 This does not delete the region; it acts like \\[kill-ring-save]."
 387   (interactive "e")
 388   (mouse-set-mark-fast click)
 389   (kill-ring-save (point) (mark t))
 390   (mouse-show-mark))
 391
 392 ;;; This function used to delete the text between point and the mouse
 393 ;;; whenever it was equal to the front of the kill ring, but some
 394 ;;; people found that confusing.
 395
 396 ;;; A list (TEXT START END), describing the text and position of the last
 397 ;;; invocation of mouse-save-then-kill.
 398 (defvar mouse-save-then-kill-posn nil)
 399
 400 (defun mouse-save-then-kill-delete-region (beg end)
 401   ;; We must make our own undo boundaries
 402   ;; because they happen automatically only for the current buffer.
 403   (undo-boundary)
 404   (if (or (= beg end) (eq buffer-undo-list t))
 405       ;; If we have no undo list in this buffer,
 406       ;; just delete.
 407       (delete-region beg end)
 408     ;; Delete, but make the undo-list entry share with the kill ring.
 409     ;; First, delete just one char, so in case buffer is being modified
 410     ;; for the first time, the undo list records that fact.
 411     (let (before-change-function after-change-function
 412           before-change-functions after-change-functions)
 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       (let (before-change-function after-change-function
 418             before-change-functions after-change-functions)
 419         (primitive-undo 1 buffer-undo-list))
 420       ;; Now delete the rest of the specified region,
 421       ;; but don't record it.
 422       (setq buffer-undo-list t)
 423       (if (/= (length (car kill-ring)) (- (max end beg) (min end beg)))
 424           (error "Lossage in mouse-save-then-kill-delete-region"))
 425       (delete-region beg end))
 426     (let ((tail buffer-undo-list))
 427       ;; Search back in buffer-undo-list for the string
 428       ;; that came from deleting one character.
 429       (while (and tail (not (stringp (car (car tail)))))
 430         (setq tail (cdr tail)))
 431       ;; Replace it with an entry for the entire deleted text.
 432       (and tail
 433            (setcar tail (cons (car kill-ring) (min beg end))))))
 434   (undo-boundary))
 435
 436 (defun mouse-save-then-kill (click)
 437   "Save text to point in kill ring; the second time, kill the text.
 438 If the text between point and the mouse is the same as what's
 439 at the front of the kill ring, this deletes the text.
 440 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 441 which prepares for a second click to delete the text.
 442
 443 If you have selected words or lines, this command extends the
 444 selection through the word or line clicked on.  If you do this
 445 again in a different position, it extends the selection again.
 446 If you do this twice in the same position, the selection is killed."
 447   (interactive "e")
 448   (mouse-minibuffer-check click)
 449   (let ((click-posn (posn-point (event-start click)))
 450         ;; Don't let a subsequent kill command append to this one:
 451         ;; prevent setting this-command to kill-region.
 452         (this-command this-command))
 453     (if (> (mod mouse-selection-click-count 3) 0)
 454         (if (not (and (eq last-command 'mouse-save-then-kill)
 455                       (equal click-posn
 456                              (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 457             ;; Find both ends of the object selected by this click.
 458             (let* ((range
 459                     (mouse-start-end click-posn click-posn
 460                                      mouse-selection-click-count)))
 461               ;; Move whichever end is closer to the click.
 462               ;; That's what xterm does, and it seems reasonable.
 463               (if (< (abs (- click-posn (mark t)))
 464                      (abs (- click-posn (point))))
 465                   (set-mark (car range))
 466                 (goto-char (nth 1 range)))
 467               ;; We have already put the old region in the kill ring.
 468               ;; Replace it with the extended region.
 469               ;; (It would be annoying to make a separate entry.)
 470               (setcar kill-ring (buffer-substring (point) (mark t)))
 471               (if interprogram-cut-function
 472                   (funcall interprogram-cut-function (car kill-ring)))
 473               ;; Arrange for a repeated mouse-3 to kill this region.
 474               (setq mouse-save-then-kill-posn
 475                     (list (car kill-ring) (point) click-posn))
 476               (mouse-show-mark))
 477           ;; If we click this button again without moving it,
 478           ;; that time kill.
 479           (mouse-save-then-kill-delete-region (point) (mark))
 480           (setq mouse-selection-click-count 0)
 481           (setq mouse-save-then-kill-posn nil))
 482       (if (and (eq last-command 'mouse-save-then-kill)
 483                mouse-save-then-kill-posn
 484                (eq (car mouse-save-then-kill-posn) (car kill-ring))
 485                (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 486           ;; If this is the second time we've called
 487           ;; mouse-save-then-kill, delete the text from the buffer.
 488           (progn
 489             (mouse-save-then-kill-delete-region (point) (mark))
 490             ;; After we kill, another click counts as "the first time".
 491             (setq mouse-save-then-kill-posn nil))
 492         (if (or (and (eq last-command 'mouse-save-then-kill)
 493                      mouse-save-then-kill-posn)
 494                 (and mark-active transient-mark-mode)
 495                 (and (eq last-command 'mouse-drag-region)
 496                      (or mark-even-if-inactive
 497                          (not transient-mark-mode))))
 498             ;; We have a selection or suitable region, so adjust it.
 499             (let* ((posn (event-start click))
 500                    (new (posn-point posn)))
 501               (select-window (posn-window posn))
 502               (if (numberp new)
 503                   (progn
 504                     ;; Move whichever end of the region is closer to the click.
 505                     ;; That is what xterm does, and it seems reasonable.
 506                     (if (< (abs (- new (point))) (abs (- new (mark t))))
 507                         (goto-char new)
 508                       (set-mark new))
 509                     (setq deactivate-mark nil)))
 510               (setcar kill-ring (buffer-substring (point) (mark t)))
 511               (if interprogram-cut-function
 512                   (funcall interprogram-cut-function (car kill-ring))))
 513           ;; We just have point, so set mark here.
 514           (mouse-set-mark-fast click)
 515           (kill-ring-save (point) (mark t))
 516           (mouse-show-mark))
 517         (setq mouse-save-then-kill-posn
 518               (list (car kill-ring) (point) click-posn))))))
 519 \f
 520 (global-set-key [M-mouse-1] 'mouse-start-secondary)
 521 (global-set-key [M-drag-mouse-1] 'mouse-set-secondary)
 522 (global-set-key [M-down-mouse-1] 'mouse-drag-secondary)
 523 (global-set-key [M-mouse-3] 'mouse-secondary-save-then-kill)
 524 (global-set-key [M-mouse-2] 'mouse-yank-secondary)
 525
 526 ;; An overlay which records the current secondary selection
 527 ;; or else is deleted when there is no secondary selection.
 528 ;; May be nil.
 529 (defvar mouse-secondary-overlay nil)
 530
 531 ;; A marker which records the specified first end for a secondary selection.
 532 ;; May be nil.
 533 (defvar mouse-secondary-start nil)
 534
 535 (defun mouse-start-secondary (click)
 536   "Set one end of the secondary selection to the position clicked on.
 537 Use \\[mouse-secondary-save-then-kill] to set the other end
 538 and complete the secondary selection."
 539   (interactive "e")
 540   (mouse-minibuffer-check click)
 541   (let ((posn (event-start click)))
 542     (save-excursion
 543       (set-buffer (window-buffer (posn-window posn)))
 544       ;; Cancel any preexisting secondary selection.
 545       (if mouse-secondary-overlay
 546           (delete-overlay mouse-secondary-overlay))
 547       (if (numberp (posn-point posn))
 548           (progn
 549             (or mouse-secondary-start
 550                 (setq mouse-secondary-start (make-marker)))
 551             (move-marker mouse-secondary-start (posn-point posn)))))))
 552
 553 (defun mouse-set-secondary (click)
 554   "Set the secondary selection to the text that the mouse is dragged over.
 555 This must be bound to a mouse drag event."
 556   (interactive "e")
 557   (mouse-minibuffer-check click)
 558   (let ((posn (event-start click))
 559         beg
 560         (end (event-end click)))
 561     (save-excursion
 562       (set-buffer (window-buffer (posn-window posn)))
 563       (if (numberp (posn-point posn))
 564           (setq beg (posn-point posn)))
 565       (if mouse-secondary-overlay
 566           (move-overlay mouse-secondary-overlay beg (posn-point end))
 567         (setq mouse-secondary-overlay (make-overlay beg (posn-point end))))
 568       (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 569
 570 (defun mouse-drag-secondary (start-event)
 571   "Set the secondary selection to the text that the mouse is dragged over.
 572 Highlight the drag area as you move the mouse.
 573 This must be bound to a button-down mouse event."
 574   (interactive "e")
 575   (mouse-minibuffer-check start-event)
 576   (let* ((start-posn (event-start start-event))
 577          (start-point (posn-point start-posn))
 578          (start-window (posn-window start-posn))
 579          (start-frame (window-frame start-window))
 580          (bounds (window-edges start-window))
 581          (top (nth 1 bounds))
 582          (bottom (if (window-minibuffer-p start-window)
 583                      (nth 3 bounds)
 584                    ;; Don't count the mode line.
 585                    (1- (nth 3 bounds))))
 586          (click-count (1- (event-click-count start-event))))
 587     (save-excursion
 588       (set-buffer (window-buffer start-window))
 589       (setq mouse-selection-click-count click-count)
 590       (or mouse-secondary-overlay
 591           (setq mouse-secondary-overlay
 592                 (make-overlay (point) (point))))
 593       (overlay-put mouse-secondary-overlay 'face 'secondary-selection)
 594       (if (> (mod click-count 3) 0)
 595           ;; Double or triple press: make an initial selection
 596           ;; of one word or line.
 597           (let ((range (mouse-start-end start-point start-point click-count)))
 598             (set-marker mouse-secondary-start nil)
 599             (move-overlay mouse-secondary-overlay 1 1
 600                           (window-buffer start-window))
 601             (move-overlay mouse-secondary-overlay (car range) (nth 1 range)
 602                           (window-buffer start-window)))
 603         ;; Single-press: cancel any preexisting secondary selection.
 604         (or mouse-secondary-start
 605             (setq mouse-secondary-start (make-marker)))
 606         (set-marker mouse-secondary-start start-point)
 607         (delete-overlay mouse-secondary-overlay))
 608       (let (event end end-point)
 609         (track-mouse
 610           (while (progn
 611                    (setq event (read-event))
 612                    (or (mouse-movement-p event)
 613                        (eq (car-safe event) 'switch-frame)))
 614
 615             (if (eq (car-safe event) 'switch-frame)
 616                 nil
 617               (setq end (event-end event)
 618                     end-point (posn-point end))
 619               (cond
 620
 621                ;; Ignore switch-frame events.
 622                ((eq (car-safe event) 'switch-frame))
 623
 624                ;; Are we moving within the original window?
 625                ((and (eq (posn-window end) start-window)
 626                      (integer-or-marker-p end-point))
 627                 (if (/= start-point end-point)
 628                     (set-marker mouse-secondary-start nil))
 629                 (let ((range (mouse-start-end start-point end-point
 630                                               click-count)))
 631                   (move-overlay mouse-secondary-overlay
 632                                 (car range) (nth 1 range))))
 633                (t
 634                 (let ((mouse-row (cdr (cdr (mouse-position)))))
 635                   (cond
 636                    ((null mouse-row))
 637                    ((< mouse-row top)
 638                     (mouse-scroll-subr
 639                      (- mouse-row top) mouse-secondary-overlay start-point))
 640                    ((and (not (eobp))
 641                          (>= mouse-row bottom))
 642                     (mouse-scroll-subr (1+ (- mouse-row bottom))
 643                                        mouse-secondary-overlay start-point)))))))))
 644
 645         (if (and (eq (get (event-basic-type event) 'event-kind) 'mouse-click)
 646                  (eq (posn-window (event-end event)) start-window)
 647                  (numberp (posn-point (event-end event))))
 648             (if (marker-position mouse-secondary-start)
 649                 (save-window-excursion
 650                   (delete-overlay mouse-secondary-overlay)
 651                   (x-set-selection 'SECONDARY nil)
 652                   (select-window start-window)
 653                   (save-excursion
 654                     (goto-char mouse-secondary-start)
 655                     (sit-for 1)))
 656               (x-set-selection
 657                'SECONDARY
 658                (buffer-substring (overlay-start mouse-secondary-overlay)
 659                                  (overlay-end mouse-secondary-overlay)))))))))
 660
 661 (defun mouse-yank-secondary (click)
 662   "Insert the secondary selection at the position clicked on.
 663 Move point to the end of the inserted text.
 664 If `mouse-yank-at-point' is non-nil, insert at point
 665 regardless of where you click."
 666   (interactive "e")
 667   (or mouse-yank-at-point (mouse-set-point click))
 668   (insert (x-get-selection 'SECONDARY)))
 669
 670 (defun mouse-kill-secondary ()
 671   "Kill the text in the secondary selection.
 672 This is intended more as a keyboard command than as a mouse command
 673 but it can work as either one.
 674
 675 The current buffer (in case of keyboard use), or the buffer clicked on,
 676 must be the one that the secondary selection is in.  This requirement
 677 is to prevent accidents."
 678   (interactive)
 679   (let* ((keys (this-command-keys))
 680          (click (elt keys (1- (length keys)))))
 681     (or (eq (overlay-buffer mouse-secondary-overlay)
 682             (if (listp click)
 683                 (window-buffer (posn-window (event-start click)))
 684               (current-buffer)))
 685         (error "Select or click on the buffer where the secondary selection is")))
 686   (save-excursion
 687     (set-buffer (overlay-buffer mouse-secondary-overlay))
 688     (kill-region (overlay-start mouse-secondary-overlay)
 689                  (overlay-end mouse-secondary-overlay)))
 690   (delete-overlay mouse-secondary-overlay)
 691   (x-set-selection 'SECONDARY nil)
 692   (setq mouse-secondary-overlay nil))
 693
 694 (defun mouse-secondary-save-then-kill (click)
 695   "Save text to point in kill ring; the second time, kill the text.
 696 You must use this in a buffer where you have recently done \\[mouse-start-secondary].
 697 If the text between where you did \\[mouse-start-secondary] and where
 698 you use this command matches the text at the front of the kill ring,
 699 this command deletes the text.
 700 Otherwise, it adds the text to the kill ring, like \\[kill-ring-save],
 701 which prepares for a second click with this command to delete the text.
 702
 703 If you have already made a secondary selection in that buffer,
 704 this command extends or retracts the selection to where you click.
 705 If you do this again in a different position, it extends or retracts
 706 again.  If you do this twice in the same position, it kills the selection."
 707   (interactive "e")
 708   (mouse-minibuffer-check click)
 709   (let ((posn (event-start click))
 710         (click-posn (posn-point (event-start click)))
 711         ;; Don't let a subsequent kill command append to this one:
 712         ;; prevent setting this-command to kill-region.
 713         (this-command this-command))
 714     (or (eq (window-buffer (posn-window posn))
 715             (or (and mouse-secondary-overlay
 716                      (overlay-buffer mouse-secondary-overlay))
 717                 (if mouse-secondary-start
 718                     (marker-buffer mouse-secondary-start))))
 719         (error "Wrong buffer"))
 720     (save-excursion
 721       (set-buffer (window-buffer (posn-window posn)))
 722       (if (> (mod mouse-selection-click-count 3) 0)
 723           (if (not (and (eq last-command 'mouse-secondary-save-then-kill)
 724                         (equal click-posn
 725                                (car (cdr-safe (cdr-safe mouse-save-then-kill-posn))))))
 726               ;; Find both ends of the object selected by this click.
 727               (let* ((range
 728                       (mouse-start-end click-posn click-posn
 729                                        mouse-selection-click-count)))
 730                 ;; Move whichever end is closer to the click.
 731                 ;; That's what xterm does, and it seems reasonable.
 732                 (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 733                        (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 734                     (move-overlay mouse-secondary-overlay (car range)
 735                                   (overlay-end mouse-secondary-overlay))
 736                   (move-overlay mouse-secondary-overlay
 737                                 (overlay-start mouse-secondary-overlay)
 738                                 (nth 1 range)))
 739                 ;; We have already put the old region in the kill ring.
 740                 ;; Replace it with the extended region.
 741                 ;; (It would be annoying to make a separate entry.)
 742                 (setcar kill-ring (buffer-substring
 743                                    (overlay-start mouse-secondary-overlay)
 744                                    (overlay-end mouse-secondary-overlay)))
 745                 (if interprogram-cut-function
 746                     (funcall interprogram-cut-function (car kill-ring)))
 747                 ;; Arrange for a repeated mouse-3 to kill this region.
 748                 (setq mouse-save-then-kill-posn
 749                       (list (car kill-ring) (point) click-posn)))
 750             ;; If we click this button again without moving it,
 751             ;; that time kill.
 752             (progn
 753               (mouse-save-then-kill-delete-region
 754                (overlay-start mouse-secondary-overlay)
 755                (overlay-end mouse-secondary-overlay))
 756               (setq mouse-save-then-kill-posn nil)
 757               (setq mouse-selection-click-count 0)
 758               (delete-overlay mouse-secondary-overlay)))
 759         (if (and (eq last-command 'mouse-secondary-save-then-kill)
 760                  mouse-save-then-kill-posn
 761                  (eq (car mouse-save-then-kill-posn) (car kill-ring))
 762                  (equal (cdr mouse-save-then-kill-posn) (list (point) click-posn)))
 763             ;; If this is the second time we've called
 764             ;; mouse-secondary-save-then-kill, delete the text from the buffer.
 765             (progn
 766               (mouse-save-then-kill-delete-region
 767                (overlay-start mouse-secondary-overlay)
 768                (overlay-end mouse-secondary-overlay))
 769               (setq mouse-save-then-kill-posn nil)
 770               (delete-overlay mouse-secondary-overlay))
 771           (if (overlay-start mouse-secondary-overlay)
 772               ;; We have a selection, so adjust it.
 773               (progn
 774                 (if (numberp click-posn)
 775                     (progn
 776                       ;; Move whichever end of the region is closer to the click.
 777                       ;; That is what xterm does, and it seems reasonable.
 778                       (if (< (abs (- click-posn (overlay-start mouse-secondary-overlay)))
 779                              (abs (- click-posn (overlay-end mouse-secondary-overlay))))
 780                           (move-overlay mouse-secondary-overlay click-posn
 781                                         (overlay-end mouse-secondary-overlay))
 782                         (move-overlay mouse-secondary-overlay
 783                                       (overlay-start mouse-secondary-overlay)
 784                                       click-posn))
 785                       (setq deactivate-mark nil)))
 786                 (setcar kill-ring (buffer-substring
 787                                    (overlay-start mouse-secondary-overlay)
 788                                    (overlay-end mouse-secondary-overlay)))
 789                 (if interprogram-cut-function
 790                     (funcall interprogram-cut-function (car kill-ring))))
 791             (if mouse-secondary-start
 792                 ;; All we have is one end of a selection,
 793                 ;; so put the other end here.
 794                 (let ((start (+ 0 mouse-secondary-start)))
 795                   (kill-ring-save start click-posn)
 796                   (if mouse-secondary-overlay
 797                       (move-overlay mouse-secondary-overlay start click-posn)
 798                     (setq mouse-secondary-overlay (make-overlay start click-posn)))
 799                   (overlay-put mouse-secondary-overlay 'face 'secondary-selection))))
 800           (setq mouse-save-then-kill-posn
 801                 (list (car kill-ring) (point) click-posn))))
 802       (x-set-selection 'SECONDARY
 803                        (if (overlay-buffer mouse-secondary-overlay)
 804                            (buffer-substring
 805                             (overlay-start mouse-secondary-overlay)
 806                             (overlay-end mouse-secondary-overlay)))))))
 807 \f
 808 (defun mouse-buffer-menu (event)
 809   "Pop up a menu of buffers for selection with the mouse.
 810 This switches buffers in the window that you clicked on,
 811 and selects that window."
 812   (interactive "e")
 813   (mouse-minibuffer-check event)
 814   (let ((menu
 815          (list "Buffer Menu"
 816                (cons "Select Buffer"
 817                      (let ((tail (buffer-list))
 818                            (maxbuf 0)
 819                            head)
 820                        (while tail
 821                          (or (eq ?\ (aref (buffer-name (car tail)) 0))
 822                              (setq maxbuf
 823                                    (max maxbuf
 824                                         (length (buffer-name (car tail))))))
 825                          (setq tail (cdr tail)))
 826                        (setq tail (buffer-list))
 827                        (while tail
 828                          (let ((elt (car tail)))
 829                            (if (not (string-match "^ "
 830                                                   (buffer-name elt)))
 831                                (setq head (cons
 832                                            (cons
 833                                             (format
 834                                              (format "%%%ds  %%s%%s  %%s"
 835                                                      maxbuf)
 836                                              (buffer-name elt)
 837                                              (if (buffer-modified-p elt)
 838                                                  "*" " ")
 839                                              (save-excursion
 840                                                (set-buffer elt)
 841                                                (if buffer-read-only "%" " "))
 842                                              (or (buffer-file-name elt) ""))
 843                                             elt)
 844                                            head))))
 845                          (setq tail (cdr tail)))
 846                        (reverse head))))))
 847     (let ((buf (x-popup-menu event menu))
 848           (window (posn-window (event-start event))))
 849       (if buf
 850           (progn
 851             (or (framep window) (select-window window))
 852             (switch-to-buffer buf))))))
 853 \f
 854 ;;; These need to be rewritten for the new scroll bar implementation.
 855
 856 ;;;!! ;; Commands for the scroll bar.
 857 ;;;!!
 858 ;;;!! (defun mouse-scroll-down (click)
 859 ;;;!!   (interactive "@e")
 860 ;;;!!   (scroll-down (1+ (cdr (mouse-coords click)))))
 861 ;;;!!
 862 ;;;!! (defun mouse-scroll-up (click)
 863 ;;;!!   (interactive "@e")
 864 ;;;!!   (scroll-up (1+ (cdr (mouse-coords click)))))
 865 ;;;!!
 866 ;;;!! (defun mouse-scroll-down-full ()
 867 ;;;!!   (interactive "@")
 868 ;;;!!   (scroll-down nil))
 869 ;;;!!
 870 ;;;!! (defun mouse-scroll-up-full ()
 871 ;;;!!   (interactive "@")
 872 ;;;!!   (scroll-up nil))
 873 ;;;!!
 874 ;;;!! (defun mouse-scroll-move-cursor (click)
 875 ;;;!!   (interactive "@e")
 876 ;;;!!   (move-to-window-line (1+ (cdr (mouse-coords click)))))
 877 ;;;!!
 878 ;;;!! (defun mouse-scroll-absolute (event)
 879 ;;;!!   (interactive "@e")
 880 ;;;!!   (let* ((pos (car event))
 881 ;;;!!    (position (car pos))
 882 ;;;!!    (length (car (cdr pos))))
 883 ;;;!!     (if (<= length 0) (setq length 1))
 884 ;;;!!     (let* ((scale-factor (max 1 (/ length (/ 8000000 (buffer-size)))))
 885 ;;;!!      (newpos (* (/ (* (/ (buffer-size) scale-factor)
 886 ;;;!!                       position)
 887 ;;;!!                    length)
 888 ;;;!!                 scale-factor)))
 889 ;;;!!       (goto-char newpos)
 890 ;;;!!       (recenter '(4)))))
 891 ;;;!!
 892 ;;;!! (defun mouse-scroll-left (click)
 893 ;;;!!   (interactive "@e")
 894 ;;;!!   (scroll-left (1+ (car (mouse-coords click)))))
 895 ;;;!!
 896 ;;;!! (defun mouse-scroll-right (click)
 897 ;;;!!   (interactive "@e")
 898 ;;;!!   (scroll-right (1+ (car (mouse-coords click)))))
 899 ;;;!!
 900 ;;;!! (defun mouse-scroll-left-full ()
 901 ;;;!!   (interactive "@")
 902 ;;;!!   (scroll-left nil))
 903 ;;;!!
 904 ;;;!! (defun mouse-scroll-right-full ()
 905 ;;;!!   (interactive "@")
 906 ;;;!!   (scroll-right nil))
 907 ;;;!!
 908 ;;;!! (defun mouse-scroll-move-cursor-horizontally (click)
 909 ;;;!!   (interactive "@e")
 910 ;;;!!   (move-to-column (1+ (car (mouse-coords click)))))
 911 ;;;!!
 912 ;;;!! (defun mouse-scroll-absolute-horizontally (event)
 913 ;;;!!   (interactive "@e")
 914 ;;;!!   (let* ((pos (car event))
 915 ;;;!!    (position (car pos))
 916 ;;;!!    (length (car (cdr pos))))
 917 ;;;!!   (set-window-hscroll (selected-window) 33)))
 918 ;;;!!
 919 ;;;!! (global-set-key [scroll-bar mouse-1] 'mouse-scroll-up)
 920 ;;;!! (global-set-key [scroll-bar mouse-2] 'mouse-scroll-absolute)
 921 ;;;!! (global-set-key [scroll-bar mouse-3] 'mouse-scroll-down)
 922 ;;;!!
 923 ;;;!! (global-set-key [vertical-slider mouse-1] 'mouse-scroll-move-cursor)
 924 ;;;!! (global-set-key [vertical-slider mouse-2] 'mouse-scroll-move-cursor)
 925 ;;;!! (global-set-key [vertical-slider mouse-3] 'mouse-scroll-move-cursor)
 926 ;;;!!
 927 ;;;!! (global-set-key [thumbup mouse-1] 'mouse-scroll-up-full)
 928 ;;;!! (global-set-key [thumbup mouse-2] 'mouse-scroll-up-full)
 929 ;;;!! (global-set-key [thumbup mouse-3] 'mouse-scroll-up-full)
 930 ;;;!!
 931 ;;;!! (global-set-key [thumbdown mouse-1] 'mouse-scroll-down-full)
 932 ;;;!! (global-set-key [thumbdown mouse-2] 'mouse-scroll-down-full)
 933 ;;;!! (global-set-key [thumbdown mouse-3] 'mouse-scroll-down-full)
 934 ;;;!!
 935 ;;;!! (global-set-key [horizontal-scroll-bar mouse-1] 'mouse-scroll-left)
 936 ;;;!! (global-set-key [horizontal-scroll-bar mouse-2]
 937 ;;;!!           'mouse-scroll-absolute-horizontally)
 938 ;;;!! (global-set-key [horizontal-scroll-bar mouse-3] 'mouse-scroll-right)
 939 ;;;!!
 940 ;;;!! (global-set-key [horizontal-slider mouse-1]
 941 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 942 ;;;!! (global-set-key [horizontal-slider mouse-2]
 943 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 944 ;;;!! (global-set-key [horizontal-slider mouse-3]
 945 ;;;!!           'mouse-scroll-move-cursor-horizontally)
 946 ;;;!!
 947 ;;;!! (global-set-key [thumbleft mouse-1] 'mouse-scroll-left-full)
 948 ;;;!! (global-set-key [thumbleft mouse-2] 'mouse-scroll-left-full)
 949 ;;;!! (global-set-key [thumbleft mouse-3] 'mouse-scroll-left-full)
 950 ;;;!!
 951 ;;;!! (global-set-key [thumbright mouse-1] 'mouse-scroll-right-full)
 952 ;;;!! (global-set-key [thumbright mouse-2] 'mouse-scroll-right-full)
 953 ;;;!! (global-set-key [thumbright mouse-3] 'mouse-scroll-right-full)
 954 ;;;!!
 955 ;;;!! (global-set-key [horizontal-scroll-bar S-mouse-2]
 956 ;;;!!           'mouse-split-window-horizontally)
 957 ;;;!! (global-set-key [mode-line S-mouse-2]
 958 ;;;!!           'mouse-split-window-horizontally)
 959 ;;;!! (global-set-key [vertical-scroll-bar S-mouse-2]
 960 ;;;!!           'mouse-split-window)
 961 \f
 962 ;;;!! ;;;;
 963 ;;;!! ;;;; Here are experimental things being tested.  Mouse events
 964 ;;;!! ;;;; are of the form:
 965 ;;;!! ;;;;      ((x y) window screen-part key-sequence timestamp)
 966 ;;;!! ;;
 967 ;;;!! ;;;;
 968 ;;;!! ;;;; Dynamically track mouse coordinates
 969 ;;;!! ;;;;
 970 ;;;!! ;;
 971 ;;;!! ;;(defun track-mouse (event)
 972 ;;;!! ;;  "Track the coordinates, absolute and relative, of the mouse."
 973 ;;;!! ;;  (interactive "@e")
 974 ;;;!! ;;  (while mouse-grabbed
 975 ;;;!! ;;    (let* ((pos (read-mouse-position (selected-screen)))
 976 ;;;!! ;;           (abs-x (car pos))
 977 ;;;!! ;;           (abs-y (cdr pos))
 978 ;;;!! ;;           (relative-coordinate (coordinates-in-window-p
 979 ;;;!! ;;                                 (list (car pos) (cdr pos))
 980 ;;;!! ;;                                 (selected-window))))
 981 ;;;!! ;;      (if (consp relative-coordinate)
 982 ;;;!! ;;          (message "mouse: [%d %d], (%d %d)" abs-x abs-y
 983 ;;;!! ;;                   (car relative-coordinate)
 984 ;;;!! ;;                   (car (cdr relative-coordinate)))
 985 ;;;!! ;;        (message "mouse: [%d %d]" abs-x abs-y)))))
 986 ;;;!!
 987 ;;;!! ;;
 988 ;;;!! ;; Dynamically put a box around the line indicated by point
 989 ;;;!! ;;
 990 ;;;!! ;;
 991 ;;;!! ;;(require 'backquote)
 992 ;;;!! ;;
 993 ;;;!! ;;(defun mouse-select-buffer-line (event)
 994 ;;;!! ;;  (interactive "@e")
 995 ;;;!! ;;  (let ((relative-coordinate
 996 ;;;!! ;;         (coordinates-in-window-p (car event) (selected-window)))
 997 ;;;!! ;;        (abs-y (car (cdr (car event)))))
 998 ;;;!! ;;    (if (consp relative-coordinate)
 999 ;;;!! ;;        (progn
1000 ;;;!! ;;          (save-excursion
1001 ;;;!! ;;            (move-to-window-line (car (cdr relative-coordinate)))
1002 ;;;!! ;;            (x-draw-rectangle
1003 ;;;!! ;;             (selected-screen)
1004 ;;;!! ;;             abs-y 0
1005 ;;;!! ;;             (save-excursion
1006 ;;;!! ;;                 (move-to-window-line (car (cdr relative-coordinate)))
1007 ;;;!! ;;                 (end-of-line)
1008 ;;;!! ;;                 (push-mark nil t)
1009 ;;;!! ;;                 (beginning-of-line)
1010 ;;;!! ;;                 (- (region-end) (region-beginning))) 1))
1011 ;;;!! ;;          (sit-for 1)
1012 ;;;!! ;;          (x-erase-rectangle (selected-screen))))))
1013 ;;;!! ;;
1014 ;;;!! ;;(defvar last-line-drawn nil)
1015 ;;;!! ;;(defvar begin-delim "[^ \t]")
1016 ;;;!! ;;(defvar end-delim   "[^ \t]")
1017 ;;;!! ;;
1018 ;;;!! ;;(defun mouse-boxing (event)
1019 ;;;!! ;;  (interactive "@e")
1020 ;;;!! ;;  (save-excursion
1021 ;;;!! ;;    (let ((screen (selected-screen)))
1022 ;;;!! ;;      (while (= (x-mouse-events) 0)
1023 ;;;!! ;;        (let* ((pos (read-mouse-position screen))
1024 ;;;!! ;;               (abs-x (car pos))
1025 ;;;!! ;;               (abs-y (cdr pos))
1026 ;;;!! ;;               (relative-coordinate
1027 ;;;!! ;;                (coordinates-in-window-p (` ((, abs-x) (, abs-y)))
1028 ;;;!! ;;                                         (selected-window)))
1029 ;;;!! ;;               (begin-reg nil)
1030 ;;;!! ;;               (end-reg nil)
1031 ;;;!! ;;               (end-column nil)
1032 ;;;!! ;;               (begin-column nil))
1033 ;;;!! ;;          (if (and (consp relative-coordinate)
1034 ;;;!! ;;                   (or (not last-line-drawn)
1035 ;;;!! ;;                       (not (= last-line-drawn abs-y))))
1036 ;;;!! ;;              (progn
1037 ;;;!! ;;                (move-to-window-line (car (cdr relative-coordinate)))
1038 ;;;!! ;;                (if (= (following-char) 10)
1039 ;;;!! ;;                    ()
1040 ;;;!! ;;                  (progn
1041 ;;;!! ;;                    (setq begin-reg (1- (re-search-forward end-delim)))
1042 ;;;!! ;;                    (setq begin-column (1- (current-column)))
1043 ;;;!! ;;                    (end-of-line)
1044 ;;;!! ;;                    (setq end-reg (1+ (re-search-backward begin-delim)))
1045 ;;;!! ;;                    (setq end-column (1+ (current-column)))
1046 ;;;!! ;;                    (message "%s" (buffer-substring begin-reg end-reg))
1047 ;;;!! ;;                    (x-draw-rectangle screen
1048 ;;;!! ;;                                      (setq last-line-drawn abs-y)
1049 ;;;!! ;;                                      begin-column
1050 ;;;!! ;;                                      (- end-column begin-column) 1))))))))))
1051 ;;;!! ;;
1052 ;;;!! ;;(defun mouse-erase-box ()
1053 ;;;!! ;;  (interactive)
1054 ;;;!! ;;  (if last-line-drawn
1055 ;;;!! ;;      (progn
1056 ;;;!! ;;        (x-erase-rectangle (selected-screen))
1057 ;;;!! ;;        (setq last-line-drawn nil))))
1058 ;;;!!
1059 ;;;!! ;;; (defun test-x-rectangle ()
1060 ;;;!! ;;;   (use-local-mouse-map (setq rectangle-test-map (make-sparse-keymap)))
1061 ;;;!! ;;;   (define-key rectangle-test-map mouse-motion-button-left 'mouse-boxing)
1062 ;;;!! ;;;   (define-key rectangle-test-map mouse-button-left-up 'mouse-erase-box))
1063 ;;;!!
1064 ;;;!! ;;
1065 ;;;!! ;; Here is how to do double clicking in lisp.  About to change.
1066 ;;;!! ;;
1067 ;;;!!
1068 ;;;!! (defvar double-start nil)
1069 ;;;!! (defconst double-click-interval 300
1070 ;;;!!   "Max ticks between clicks")
1071 ;;;!!
1072 ;;;!! (defun double-down (event)
1073 ;;;!!   (interactive "@e")
1074 ;;;!!   (if double-start
1075 ;;;!!       (let ((interval (- (nth 4 event) double-start)))
1076 ;;;!!   (if (< interval double-click-interval)
1077 ;;;!!       (progn
1078 ;;;!!         (backward-up-list 1)
1079 ;;;!!         ;;      (message "Interval %d" interval)
1080 ;;;!!         (sleep-for 1)))
1081 ;;;!!   (setq double-start nil))
1082 ;;;!!     (setq double-start (nth 4 event))))
1083 ;;;!!
1084 ;;;!! (defun double-up (event)
1085 ;;;!!   (interactive "@e")
1086 ;;;!!   (and double-start
1087 ;;;!!        (> (- (nth 4 event ) double-start) double-click-interval)
1088 ;;;!!        (setq double-start nil)))
1089 ;;;!!
1090 ;;;!! ;;; (defun x-test-doubleclick ()
1091 ;;;!! ;;;   (use-local-mouse-map (setq doubleclick-test-map (make-sparse-keymap)))
1092 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left 'double-down)
1093 ;;;!! ;;;   (define-key doubleclick-test-map mouse-button-left-up 'double-up))
1094 ;;;!!
1095 ;;;!! ;;
1096 ;;;!! ;; This scrolls while button is depressed.  Use preferable in scroll bar.
1097 ;;;!! ;;
1098 ;;;!!
1099 ;;;!! (defvar scrolled-lines 0)
1100 ;;;!! (defconst scroll-speed 1)
1101 ;;;!!
1102 ;;;!! (defun incr-scroll-down (event)
1103 ;;;!!   (interactive "@e")
1104 ;;;!!   (setq scrolled-lines 0)
1105 ;;;!!   (incremental-scroll scroll-speed))
1106 ;;;!!
1107 ;;;!! (defun incr-scroll-up (event)
1108 ;;;!!   (interactive "@e")
1109 ;;;!!   (setq scrolled-lines 0)
1110 ;;;!!   (incremental-scroll (- scroll-speed)))
1111 ;;;!!
1112 ;;;!! (defun incremental-scroll (n)
1113 ;;;!!   (while (= (x-mouse-events) 0)
1114 ;;;!!     (setq scrolled-lines (1+ (* scroll-speed scrolled-lines)))
1115 ;;;!!     (scroll-down n)
1116 ;;;!!     (sit-for 300 t)))
1117 ;;;!!
1118 ;;;!! (defun incr-scroll-stop (event)
1119 ;;;!!   (interactive "@e")
1120 ;;;!!   (message "Scrolled %d lines" scrolled-lines)
1121 ;;;!!   (setq scrolled-lines 0)
1122 ;;;!!   (sleep-for 1))
1123 ;;;!!
1124 ;;;!! ;;; (defun x-testing-scroll ()
1125 ;;;!! ;;;   (let ((scrolling-map (function mouse-vertical-scroll-bar-prefix)))
1126 ;;;!! ;;;     (define-key scrolling-map mouse-button-left 'incr-scroll-down)
1127 ;;;!! ;;;     (define-key scrolling-map mouse-button-right 'incr-scroll-up)
1128 ;;;!! ;;;     (define-key scrolling-map mouse-button-left-up 'incr-scroll-stop)
1129 ;;;!! ;;;     (define-key scrolling-map mouse-button-right-up 'incr-scroll-stop)))
1130 ;;;!!
1131 ;;;!! ;;
1132 ;;;!! ;; Some playthings suitable for picture mode?  They need work.
1133 ;;;!! ;;
1134 ;;;!!
1135 ;;;!! (defun mouse-kill-rectangle (event)
1136 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1137 ;;;!!   (interactive "@e")
1138 ;;;!!   (let ((point-save (point)))
1139 ;;;!!     (save-excursion
1140 ;;;!!       (mouse-set-point event)
1141 ;;;!!       (push-mark nil t)
1142 ;;;!!       (if (> point-save (point))
1143 ;;;!!     (kill-rectangle (point) point-save)
1144 ;;;!!   (kill-rectangle point-save (point))))))
1145 ;;;!!
1146 ;;;!! (defun mouse-open-rectangle (event)
1147 ;;;!!   "Kill the rectangle between point and the mouse cursor."
1148 ;;;!!   (interactive "@e")
1149 ;;;!!   (let ((point-save (point)))
1150 ;;;!!     (save-excursion
1151 ;;;!!       (mouse-set-point event)
1152 ;;;!!       (push-mark nil t)
1153 ;;;!!       (if (> point-save (point))
1154 ;;;!!     (open-rectangle (point) point-save)
1155 ;;;!!   (open-rectangle point-save (point))))))
1156 ;;;!!
1157 ;;;!! ;; Must be a better way to do this.
1158 ;;;!!
1159 ;;;!! (defun mouse-multiple-insert (n char)
1160 ;;;!!   (while (> n 0)
1161 ;;;!!     (insert char)
1162 ;;;!!     (setq n (1- n))))
1163 ;;;!!
1164 ;;;!! ;; What this could do is not finalize until button was released.
1165 ;;;!!
1166 ;;;!! (defun mouse-move-text (event)
1167 ;;;!!   "Move text from point to cursor position, inserting spaces."
1168 ;;;!!   (interactive "@e")
1169 ;;;!!   (let* ((relative-coordinate
1170 ;;;!!     (coordinates-in-window-p (car event) (selected-window))))
1171 ;;;!!     (if (consp relative-coordinate)
1172 ;;;!!   (cond ((> (current-column) (car relative-coordinate))
1173 ;;;!!          (delete-char
1174 ;;;!!           (- (car relative-coordinate) (current-column))))
1175 ;;;!!         ((< (current-column) (car relative-coordinate))
1176 ;;;!!          (mouse-multiple-insert
1177 ;;;!!           (- (car relative-coordinate) (current-column)) " "))
1178 ;;;!!         ((= (current-column) (car relative-coordinate)) (ding))))))
1179 \f
1180 ;; Choose a completion with the mouse.
1181
1182 (defun mouse-choose-completion (event)
1183   "Click on an alternative in the `*Completions*' buffer to choose it."
1184   (interactive "e")
1185   (let ((buffer (window-buffer))
1186         choice)
1187     (save-excursion
1188       (set-buffer (window-buffer (posn-window (event-start event))))
1189       (if completion-reference-buffer
1190           (setq buffer completion-reference-buffer))
1191       (save-excursion
1192         (goto-char (posn-point (event-start event)))
1193         (let (beg end)
1194           (skip-chars-forward "^ \t\n")
1195           (while (looking-at " [^ \n\t]")
1196             (forward-char 1)
1197             (skip-chars-forward "^ \t\n"))
1198           (setq end (point))
1199           (skip-chars-backward "^ \t\n")
1200           (while (and (= (preceding-char) ?\ )
1201                       (not (and (> (point) (1+ (point-min)))
1202                                 (= (char-after (- (point) 2)) ?\ ))))
1203             (backward-char 1)
1204             (skip-chars-backward "^ \t\n"))
1205           (setq beg (point))
1206           (setq choice (buffer-substring beg end)))))
1207     (let ((owindow (selected-window)))
1208       (select-window (posn-window (event-start event)))
1209       (if (and (one-window-p t 'selected-frame)
1210                (window-dedicated-p (selected-window)))
1211           ;; This is a special buffer's frame
1212           (iconify-frame (selected-frame))
1213         (or (window-dedicated-p (selected-window))
1214             (bury-buffer)))
1215       (select-window owindow))
1216     (choose-completion-string choice buffer)))
1217 \f
1218 ;; Font selection.
1219
1220 (defun font-menu-add-default ()
1221   (let* ((default (cdr (assq 'font (frame-parameters (selected-frame)))))
1222          (font-alist x-fixed-font-alist)
1223          (elt (or (assoc "Misc" font-alist) (nth 1 font-alist))))
1224     (if (assoc "Default" elt)
1225         (delete (assoc "Default" elt) elt))
1226     (setcdr elt
1227             (cons (list "Default"
1228                         (cdr (assq 'font (frame-parameters (selected-frame)))))
1229                   (cdr elt)))))
1230
1231 (defvar x-fixed-font-alist
1232   '("Font menu"
1233     ("Misc"
1234      ("6x10" "-misc-fixed-medium-r-normal--10-100-75-75-c-60-*-1" "6x10")
1235      ("6x12" "-misc-fixed-medium-r-semicondensed--12-110-75-75-c-60-*-1" "6x12")
1236      ("6x13" "-misc-fixed-medium-r-semicondensed--13-120-75-75-c-60-*-1" "6x13")
1237      ("lucida 13"
1238       "-b&h-lucidatypewriter-medium-r-normal-sans-0-0-0-0-m-0-*-1")
1239      ("7x13" "-misc-fixed-medium-r-normal--13-120-75-75-c-70-*-1" "7x13")
1240      ("7x14" "-misc-fixed-medium-r-normal--14-130-75-75-c-70-*-1" "7x14")
1241      ("9x15" "-misc-fixed-medium-r-normal--15-140-*-*-c-*-*-1" "9x15")
1242      ("")
1243      ("clean 8x8" "-schumacher-clean-medium-r-normal--*-80-*-*-c-*-*-1")
1244      ("clean 8x14" "-schumacher-clean-medium-r-normal--*-140-*-*-c-*-*-1")
1245      ("clean 8x10" "-schumacher-clean-medium-r-normal--*-100-*-*-c-*-*-1")
1246      ("clean 8x16" "-schumacher-clean-medium-r-normal--*-160-*-*-c-*-*-1")
1247      ("")
1248      ("sony 8x16" "-sony-fixed-medium-r-normal--16-120-100-100-c-80-*-1")
1249      ("")
1250      ("fixed" "fixed")
1251      ("10x20" "10x20")
1252      ("11x18" "11x18")
1253      ("12x24" "12x24"))
1254 ;;; We don't seem to have these; who knows what they are.
1255 ;;;    ("fg-18" "fg-18")
1256 ;;;    ("fg-25" "fg-25")
1257 ;;;    ("lucidasanstypewriter-12" "lucidasanstypewriter-12")
1258 ;;;    ("lucidasanstypewriter-bold-14" "lucidasanstypewriter-bold-14")
1259 ;;;    ("lucidasanstypewriter-bold-24" "lucidasanstypewriter-bold-24")
1260 ;;;    ("lucidatypewriter-bold-r-24" "-b&h-lucidatypewriter-bold-r-normal-sans-24-240-75-75-m-140-iso8859-1")
1261 ;;;    ("fixed-medium-20" "-misc-fixed-medium-*-*-*-20-*-*-*-*-*-*-*")
1262     ("Courier"
1263      ("8" "-adobe-courier-medium-r-normal--*-80-*-*-m-*-iso8859-1")
1264      ("10" "-adobe-courier-medium-r-normal--*-100-*-*-m-*-iso8859-1")
1265      ("12" "-adobe-courier-medium-r-normal--*-120-*-*-m-*-iso8859-1")
1266      ("14" "-adobe-courier-medium-r-normal--*-140-*-*-m-*-iso8859-1")
1267      ("18" "-adobe-courier-medium-r-normal--*-180-*-*-m-*-iso8859-1")
1268      ("24" "-adobe-courier-medium-r-normal--*-240-*-*-m-*-iso8859-1")
1269      ("8 bold" "-adobe-courier-bold-r-normal--*-80-*-*-m-*-iso8859-1")
1270      ("10 bold" "-adobe-courier-bold-r-normal--*-100-*-*-m-*-iso8859-1")
1271      ("12 bold" "-adobe-courier-bold-r-normal--*-120-*-*-m-*-iso8859-1")
1272      ("14 bold" "-adobe-courier-bold-r-normal--*-140-*-*-m-*-iso8859-1")
1273      ("18 bold" "-adobe-courier-bold-r-normal--*-180-*-*-m-*-iso8859-1")
1274      ("24 bold" "-adobe-courier-bold-r-normal--*-240-*-*-m-*-iso8859-1")
1275      ("8 slant" "-adobe-courier-medium-o-normal--*-80-*-*-m-*-iso8859-1")
1276      ("10 slant" "-adobe-courier-medium-o-normal--*-100-*-*-m-*-iso8859-1")
1277      ("12 slant" "-adobe-courier-medium-o-normal--*-120-*-*-m-*-iso8859-1")
1278      ("14 slant" "-adobe-courier-medium-o-normal--*-140-*-*-m-*-iso8859-1")
1279      ("18 slant" "-adobe-courier-medium-o-normal--*-180-*-*-m-*-iso8859-1")
1280      ("24 slant" "-adobe-courier-medium-o-normal--*-240-*-*-m-*-iso8859-1")
1281      ("8 bold slant" "-adobe-courier-bold-o-normal--*-80-*-*-m-*-iso8859-1")
1282      ("10 bold slant" "-adobe-courier-bold-o-normal--*-100-*-*-m-*-iso8859-1")
1283      ("12 bold slant" "-adobe-courier-bold-o-normal--*-120-*-*-m-*-iso8859-1")
1284      ("14 bold slant" "-adobe-courier-bold-o-normal--*-140-*-*-m-*-iso8859-1")
1285      ("18 bold slant" "-adobe-courier-bold-o-normal--*-180-*-*-m-*-iso8859-1")
1286      ("24 bold slant" "-adobe-courier-bold-o-normal--*-240-*-*-m-*-iso8859-1"))
1287     )
1288   "X fonts suitable for use in Emacs.")
1289
1290 (defun mouse-set-font (&rest fonts)
1291   "Select an emacs font from a list of known good fonts"
1292   (interactive
1293    (x-popup-menu last-nonmenu-event x-fixed-font-alist))
1294   (if fonts
1295       (let (font)
1296         (while fonts
1297           (condition-case nil
1298               (progn
1299                 (set-default-font (car fonts))
1300                 (setq font (car fonts))
1301                 (setq fonts nil))
1302             (error
1303              (setq fonts (cdr fonts)))))
1304         (if (null font)
1305             (error "Font not found")))))
1306 \f
1307 ;;; Bindings for mouse commands.
1308
1309 (define-key global-map [down-mouse-1] 'mouse-drag-region)
1310 (global-set-key [mouse-1]       'mouse-set-point)
1311 (global-set-key [drag-mouse-1]  'mouse-set-region)
1312
1313 ;; These are tested for in mouse-drag-region.
1314 (global-set-key [double-mouse-1] 'mouse-set-point)
1315 (global-set-key [triple-mouse-1] 'mouse-set-point)
1316
1317 (global-set-key [mouse-2]       'mouse-yank-at-click)
1318 (global-set-key [mouse-3]       'mouse-save-then-kill)
1319
1320 ;; By binding these to down-going events, we let the user use the up-going
1321 ;; event to make the selection, saving a click.
1322 (global-set-key [C-down-mouse-1]        'mouse-buffer-menu)
1323 (global-set-key [C-down-mouse-3]        'mouse-set-font)
1324
1325 ;; Replaced with dragging mouse-1
1326 ;; (global-set-key [S-mouse-1]  'mouse-set-mark)
1327
1328 (global-set-key [mode-line mouse-1] 'mouse-select-window)
1329 (global-set-key [mode-line mouse-2] 'mouse-delete-other-windows)
1330 (global-set-key [mode-line mouse-3] 'mouse-delete-window)
1331 (global-set-key [mode-line C-mouse-2] 'mouse-split-window-horizontally)
1332
1333 (provide 'mouse)
1334
1335 ;;; mouse.el ends here