| 1 | ;;; mouse-sel.el --- multi-click selection support for Emacs 19 |
| 2 | |
| 3 | ;; Copyright (C) 1993,1994,1995,2001,2002 Free Software Foundation, Inc. |
| 4 | |
| 5 | ;; Author: Mike Williams <mdub@bigfoot.com> |
| 6 | ;; Keywords: mouse |
| 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 the |
| 22 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 23 | ;; Boston, MA 02111-1307, USA. |
| 24 | |
| 25 | ;;; Commentary: |
| 26 | |
| 27 | ;; This module provides multi-click mouse support for GNU Emacs versions |
| 28 | ;; 19.18 and later. I've tried to make it behave more like standard X |
| 29 | ;; clients (eg. xterm) than the default Emacs 19 mouse selection handlers. |
| 30 | ;; Basically: |
| 31 | ;; |
| 32 | ;; * Clicking mouse-1 starts (cancels) selection, dragging extends it. |
| 33 | ;; |
| 34 | ;; * Clicking or dragging mouse-3 extends the selection as well. |
| 35 | ;; |
| 36 | ;; * Double-clicking on word constituents selects words. |
| 37 | ;; Double-clicking on symbol constituents selects symbols. |
| 38 | ;; Double-clicking on quotes or parentheses selects sexps. |
| 39 | ;; Double-clicking on whitespace selects whitespace. |
| 40 | ;; Triple-clicking selects lines. |
| 41 | ;; Quad-clicking selects paragraphs. |
| 42 | ;; |
| 43 | ;; * Selecting sets the region & X primary selection, but does NOT affect |
| 44 | ;; the kill-ring. Because the mouse handlers set the primary selection |
| 45 | ;; directly, mouse-sel sets the variables interprogram-cut-function |
| 46 | ;; and interprogram-paste-function to nil. |
| 47 | ;; |
| 48 | ;; * Clicking mouse-2 inserts the contents of the primary selection at |
| 49 | ;; the mouse position (or point, if mouse-yank-at-point is non-nil). |
| 50 | ;; |
| 51 | ;; * Pressing mouse-2 while selecting or extending copies selection |
| 52 | ;; to the kill ring. Pressing mouse-1 or mouse-3 kills it. |
| 53 | ;; |
| 54 | ;; * Double-clicking mouse-3 also kills selection. |
| 55 | ;; |
| 56 | ;; * M-mouse-1, M-mouse-2 & M-mouse-3 work similarly to mouse-1, mouse-2 |
| 57 | ;; & mouse-3, but operate on the X secondary selection rather than the |
| 58 | ;; primary selection and region. |
| 59 | ;; |
| 60 | ;; This module requires my thingatpt.el module, which it uses to find the |
| 61 | ;; bounds of words, lines, sexps, etc. |
| 62 | ;; |
| 63 | ;; Thanks to KevinB@bartley.demon.co.uk for his useful input. |
| 64 | ;; |
| 65 | ;;--- Customisation ------------------------------------------------------- |
| 66 | ;; |
| 67 | ;; * You may want to use none or more of following: |
| 68 | ;; |
| 69 | ;; ;; Enable region highlight |
| 70 | ;; (transient-mark-mode 1) |
| 71 | ;; |
| 72 | ;; ;; But only in the selected window |
| 73 | ;; (setq highlight-nonselected-windows nil) |
| 74 | ;; |
| 75 | ;; ;; Enable pending-delete |
| 76 | ;; (delete-selection-mode 1) |
| 77 | ;; |
| 78 | ;; * You can control the way mouse-sel binds its keys by setting the value |
| 79 | ;; of mouse-sel-default-bindings before loading mouse-sel. |
| 80 | ;; |
| 81 | ;; (a) If mouse-sel-default-bindings = t (the default) |
| 82 | ;; |
| 83 | ;; Mouse sets and insert selection |
| 84 | ;; mouse-1 mouse-select |
| 85 | ;; mouse-2 mouse-insert-selection |
| 86 | ;; mouse-3 mouse-extend |
| 87 | ;; |
| 88 | ;; Selection/kill-ring interaction is disabled |
| 89 | ;; interprogram-cut-function = nil |
| 90 | ;; interprogram-paste-function = nil |
| 91 | ;; |
| 92 | ;; (b) If mouse-sel-default-bindings = 'interprogram-cut-paste |
| 93 | ;; |
| 94 | ;; Mouse sets selection, and pastes from kill-ring |
| 95 | ;; mouse-1 mouse-select |
| 96 | ;; mouse-2 mouse-insert-selection |
| 97 | ;; mouse-3 mouse-extend |
| 98 | ;; In this mode, mouse-insert-selection just calls mouse-yank-at-click. |
| 99 | ;; |
| 100 | ;; Selection/kill-ring interaction is retained |
| 101 | ;; interprogram-cut-function = x-select-text |
| 102 | ;; interprogram-paste-function = x-cut-buffer-or-selection-value |
| 103 | ;; |
| 104 | ;; What you lose is the ability to select some text in |
| 105 | ;; delete-selection-mode and yank over the top of it. |
| 106 | ;; |
| 107 | ;; (c) If mouse-sel-default-bindings = nil, no bindings are made. |
| 108 | ;; |
| 109 | ;; * By default, mouse-insert-selection (mouse-2) inserts the selection at |
| 110 | ;; the mouse position. You can tell it to insert at point instead with: |
| 111 | ;; |
| 112 | ;; (setq mouse-yank-at-point t) |
| 113 | ;; |
| 114 | ;; * I like to leave point at the end of the region nearest to where the |
| 115 | ;; mouse was, even though this makes region highlighting mis-leading (the |
| 116 | ;; cursor makes it look like one extra character is selected). You can |
| 117 | ;; disable this behaviour with: |
| 118 | ;; |
| 119 | ;; (setq mouse-sel-leave-point-near-mouse nil) |
| 120 | ;; |
| 121 | ;; * By default, mouse-select cycles the click count after 4 clicks. That |
| 122 | ;; is, clicking mouse-1 five times has the same effect as clicking it |
| 123 | ;; once, clicking six times has the same effect as clicking twice, etc. |
| 124 | ;; Disable this behaviour with: |
| 125 | ;; |
| 126 | ;; (setq mouse-sel-cycle-clicks nil) |
| 127 | ;; |
| 128 | ;; * The variables mouse-sel-{set,get}-selection-function control how the |
| 129 | ;; selection is handled. Under X Windows, these variables default so |
| 130 | ;; that the X primary selection is used. Under other windowing systems, |
| 131 | ;; alternate functions are used, which simply store the selection value |
| 132 | ;; in a variable. |
| 133 | ;; |
| 134 | ;; * You can change the selection highlight face by altering the properties |
| 135 | ;; of mouse-drag-overlay, eg. |
| 136 | ;; |
| 137 | ;; (overlay-put mouse-drag-overlay 'face 'bold) |
| 138 | |
| 139 | ;;; Code: |
| 140 | |
| 141 | (require 'mouse) |
| 142 | (require 'thingatpt) |
| 143 | |
| 144 | (eval-when-compile |
| 145 | (require 'cl)) |
| 146 | |
| 147 | ;;=== User Variables ====================================================== |
| 148 | |
| 149 | (defgroup mouse-sel nil |
| 150 | "Mouse selection enhancement." |
| 151 | :group 'mouse) |
| 152 | |
| 153 | (defcustom mouse-sel-leave-point-near-mouse t |
| 154 | "*Leave point near last mouse position. |
| 155 | If non-nil, \\[mouse-select] and \\[mouse-extend] will leave point at the end |
| 156 | of the region nearest to where the mouse last was. |
| 157 | If nil, point will always be placed at the beginning of the region." |
| 158 | :type 'boolean |
| 159 | :group 'mouse-sel) |
| 160 | |
| 161 | (defcustom mouse-sel-cycle-clicks t |
| 162 | "*If non-nil, \\[mouse-select] cycles the click-counts after 4 clicks." |
| 163 | :type 'boolean |
| 164 | :group 'mouse-sel) |
| 165 | |
| 166 | (defcustom mouse-sel-default-bindings t |
| 167 | "*Control mouse bindings." |
| 168 | :type '(choice (const :tag "none" nil) |
| 169 | (const :tag "cut and paste" interprogram-cut-paste) |
| 170 | (other :tag "default bindings" t)) |
| 171 | :group 'mouse-sel) |
| 172 | |
| 173 | ;;=== Key bindings ======================================================== |
| 174 | |
| 175 | (defconst mouse-sel-bound-events |
| 176 | '(;; Primary selection bindings. |
| 177 | ;; |
| 178 | ;; Bind keys to `ignore' instead of unsetting them because modes may |
| 179 | ;; bind `down-mouse-1', for instance, without binding `mouse-1'. |
| 180 | ;; If we unset `mouse-1', this leads to a bitch_at_user when the |
| 181 | ;; mouse goes up because no matching binding is found for that. |
| 182 | ([mouse-1] . ignore) |
| 183 | ([drag-mouse-1] . ignore) |
| 184 | ([mouse-3] . ignore) |
| 185 | ([down-mouse-1] . mouse-select) |
| 186 | ([down-mouse-3] . mouse-extend) |
| 187 | ([mouse-2] . mouse-insert-selection) |
| 188 | ;; Secondary selection bindings. |
| 189 | ([M-mouse-1] . ignore) |
| 190 | ([M-drag-mouse-1] . ignore) |
| 191 | ([M-mouse-3] . ignore) |
| 192 | ([M-down-mouse-1] . mouse-select-secondary) |
| 193 | ([M-mouse-2] . mouse-insert-secondary) |
| 194 | ([M-down-mouse-3] . mouse-extend-secondary)) |
| 195 | "An alist of events that `mouse-sel-mode' binds.") |
| 196 | |
| 197 | ;;=== User Command ======================================================== |
| 198 | |
| 199 | (defvar mouse-sel-original-bindings nil) |
| 200 | (defvar mouse-sel-original-interprogram-cut-function nil) |
| 201 | (defvar mouse-sel-original-interprogram-paste-function nil) |
| 202 | |
| 203 | ;;;###autoload |
| 204 | (define-minor-mode mouse-sel-mode |
| 205 | "Toggle Mouse Sel mode. |
| 206 | With prefix ARG, turn Mouse Sel mode on if and only if ARG is positive. |
| 207 | Returns the new status of Mouse Sel mode (non-nil means on). |
| 208 | |
| 209 | When Mouse Sel mode is enabled, mouse selection is enhanced in various ways: |
| 210 | |
| 211 | - Clicking mouse-1 starts (cancels) selection, dragging extends it. |
| 212 | |
| 213 | - Clicking or dragging mouse-3 extends the selection as well. |
| 214 | |
| 215 | - Double-clicking on word constituents selects words. |
| 216 | Double-clicking on symbol constituents selects symbols. |
| 217 | Double-clicking on quotes or parentheses selects sexps. |
| 218 | Double-clicking on whitespace selects whitespace. |
| 219 | Triple-clicking selects lines. |
| 220 | Quad-clicking selects paragraphs. |
| 221 | |
| 222 | - Selecting sets the region & X primary selection, but does NOT affect |
| 223 | the `kill-ring', nor do the kill-ring functions change the X selection. |
| 224 | Because the mouse handlers set the primary selection directly, |
| 225 | mouse-sel sets the variables `interprogram-cut-function' and |
| 226 | `interprogram-paste-function' to nil. |
| 227 | |
| 228 | - Clicking mouse-2 inserts the contents of the primary selection at |
| 229 | the mouse position (or point, if `mouse-yank-at-point' is non-nil). |
| 230 | |
| 231 | - Pressing mouse-2 while selecting or extending copies selection |
| 232 | to the kill ring. Pressing mouse-1 or mouse-3 kills it. |
| 233 | |
| 234 | - Double-clicking mouse-3 also kills selection. |
| 235 | |
| 236 | - M-mouse-1, M-mouse-2 & M-mouse-3 work similarly to mouse-1, mouse-2 |
| 237 | & mouse-3, but operate on the X secondary selection rather than the |
| 238 | primary selection and region." |
| 239 | :global t |
| 240 | (if mouse-sel-mode |
| 241 | (progn |
| 242 | (add-hook 'x-lost-selection-hooks 'mouse-sel-lost-selection-hook) |
| 243 | (when mouse-sel-default-bindings |
| 244 | ;; Save original bindings and replace them with new ones. |
| 245 | (setq mouse-sel-original-bindings |
| 246 | (mapcar (lambda (binding) |
| 247 | (let ((event (car binding))) |
| 248 | (prog1 (cons event (lookup-key global-map event)) |
| 249 | (global-set-key event (cdr binding))))) |
| 250 | mouse-sel-bound-events)) |
| 251 | ;; Update interprogram functions. |
| 252 | (setq mouse-sel-original-interprogram-cut-function |
| 253 | interprogram-cut-function |
| 254 | mouse-sel-original-interprogram-paste-function |
| 255 | interprogram-paste-function) |
| 256 | (unless (eq mouse-sel-default-bindings 'interprogram-cut-paste) |
| 257 | (setq interprogram-cut-function nil |
| 258 | interprogram-paste-function nil)))) |
| 259 | |
| 260 | ;; Restore original bindings |
| 261 | (remove-hook 'x-lost-selection-hooks 'mouse-sel-lost-selection-hook) |
| 262 | (dolist (binding mouse-sel-original-bindings) |
| 263 | (global-set-key (car binding) (cdr binding))) |
| 264 | (setq interprogram-cut-function |
| 265 | mouse-sel-original-interprogram-cut-function |
| 266 | interprogram-paste-function |
| 267 | mouse-sel-original-interprogram-paste-function))) |
| 268 | |
| 269 | ;;=== Internal Variables/Constants ======================================== |
| 270 | |
| 271 | (defvar mouse-sel-primary-thing nil |
| 272 | "Type of PRIMARY selection in current buffer.") |
| 273 | (make-variable-buffer-local 'mouse-sel-primary-thing) |
| 274 | |
| 275 | (defvar mouse-sel-secondary-thing nil |
| 276 | "Type of SECONDARY selection in current buffer.") |
| 277 | (make-variable-buffer-local 'mouse-sel-secondary-thing) |
| 278 | |
| 279 | ;; Ensure that secondary overlay is defined |
| 280 | (unless (overlayp mouse-secondary-overlay) |
| 281 | (setq mouse-secondary-overlay (make-overlay 1 1)) |
| 282 | (overlay-put mouse-secondary-overlay 'face 'secondary-selection)) |
| 283 | |
| 284 | (defconst mouse-sel-selection-alist |
| 285 | '((PRIMARY mouse-drag-overlay mouse-sel-primary-thing) |
| 286 | (SECONDARY mouse-secondary-overlay mouse-sel-secondary-thing)) |
| 287 | "Alist associating selections with variables. |
| 288 | Each element is of the form: |
| 289 | |
| 290 | (SELECTION-NAME OVERLAY-SYMBOL SELECTION-THING-SYMBOL) |
| 291 | |
| 292 | where SELECTION-NAME = name of selection |
| 293 | OVERLAY-SYMBOL = name of variable containing overlay to use |
| 294 | SELECTION-THING-SYMBOL = name of variable where the current selection |
| 295 | type for this selection should be stored.") |
| 296 | |
| 297 | (defvar mouse-sel-set-selection-function |
| 298 | (if (eq mouse-sel-default-bindings 'interprogram-cut-paste) |
| 299 | 'x-set-selection |
| 300 | (lambda (selection value) |
| 301 | (if (eq selection 'PRIMARY) |
| 302 | (x-select-text value) |
| 303 | (x-set-selection selection value)))) |
| 304 | "Function to call to set selection. |
| 305 | Called with two arguments: |
| 306 | |
| 307 | SELECTION, the name of the selection concerned, and |
| 308 | VALUE, the text to store. |
| 309 | |
| 310 | This sets the selection as well as the cut buffer for the older applications, |
| 311 | unless `mouse-sel-default-bindings' is `interprogram-cut-paste'.") |
| 312 | |
| 313 | (defvar mouse-sel-get-selection-function |
| 314 | (lambda (selection) |
| 315 | (if (eq selection 'PRIMARY) |
| 316 | (or (x-cut-buffer-or-selection-value) x-last-selected-text) |
| 317 | (x-get-selection selection))) |
| 318 | "Function to call to get the selection. |
| 319 | Called with one argument: |
| 320 | |
| 321 | SELECTION: the name of the selection concerned.") |
| 322 | |
| 323 | ;;=== Support/access functions ============================================ |
| 324 | |
| 325 | (defun mouse-sel-determine-selection-thing (nclicks) |
| 326 | "Determine what `thing' `mouse-sel' should operate on. |
| 327 | The first argument is NCLICKS, is the number of consecutive |
| 328 | mouse clicks at the same position. |
| 329 | |
| 330 | Double-clicking on word constituents selects words. |
| 331 | Double-clicking on symbol constituents selects symbols. |
| 332 | Double-clicking on quotes or parentheses selects sexps. |
| 333 | Double-clicking on whitespace selects whitespace. |
| 334 | Triple-clicking selects lines. |
| 335 | Quad-clicking selects paragraphs. |
| 336 | |
| 337 | Feel free to re-define this function to support your own desired |
| 338 | multi-click semantics." |
| 339 | (let* ((next-char (char-after (point))) |
| 340 | (char-syntax (if next-char (char-syntax next-char)))) |
| 341 | (if mouse-sel-cycle-clicks |
| 342 | (setq nclicks (1+ (% (1- nclicks) 4)))) |
| 343 | (cond |
| 344 | ((= nclicks 1) nil) |
| 345 | ((= nclicks 3) 'line) |
| 346 | ((>= nclicks 4) 'paragraph) |
| 347 | ((memq char-syntax '(?\( ?\) ?\" ?')) 'sexp) |
| 348 | ((memq next-char '(? ?\t ?\n)) 'whitespace) |
| 349 | ((eq char-syntax ?_) 'symbol) |
| 350 | ((eq char-syntax ?w) 'word)))) |
| 351 | |
| 352 | (defun mouse-sel-set-selection (selection value) |
| 353 | "Set the specified SELECTION to VALUE." |
| 354 | (if mouse-sel-set-selection-function |
| 355 | (funcall mouse-sel-set-selection-function selection value) |
| 356 | (put 'mouse-sel-internal-selection selection value))) |
| 357 | |
| 358 | (defun mouse-sel-get-selection (selection) |
| 359 | "Get the value of the specified SELECTION." |
| 360 | (if mouse-sel-get-selection-function |
| 361 | (funcall mouse-sel-get-selection-function selection) |
| 362 | (get 'mouse-sel-internal-selection selection))) |
| 363 | |
| 364 | (defun mouse-sel-selection-overlay (selection) |
| 365 | "Return overlay corresponding to SELECTION." |
| 366 | (let ((symbol (nth 1 (assoc selection mouse-sel-selection-alist)))) |
| 367 | (or symbol (error "No overlay corresponding to %s selection" selection)) |
| 368 | (symbol-value symbol))) |
| 369 | |
| 370 | (defun mouse-sel-selection-thing (selection) |
| 371 | "Return overlay corresponding to SELECTION." |
| 372 | (let ((symbol (nth 2 (assoc selection mouse-sel-selection-alist)))) |
| 373 | (or symbol (error "No symbol corresponding to %s selection" selection)) |
| 374 | symbol)) |
| 375 | |
| 376 | (defun mouse-sel-region-to-primary (orig-window) |
| 377 | "Convert region to PRIMARY overlay and deactivate region. |
| 378 | Argument ORIG-WINDOW specifies the window the cursor was in when the |
| 379 | originating command was issued, and is used to determine whether the |
| 380 | region was visible or not." |
| 381 | (if transient-mark-mode |
| 382 | (let ((overlay (mouse-sel-selection-overlay 'PRIMARY))) |
| 383 | (cond |
| 384 | ((and mark-active |
| 385 | (or highlight-nonselected-windows |
| 386 | (eq orig-window (selected-window)))) |
| 387 | ;; Region was visible, so convert region to overlay |
| 388 | (move-overlay overlay (region-beginning) (region-end) |
| 389 | (current-buffer))) |
| 390 | ((eq orig-window (selected-window)) |
| 391 | ;; Point was visible, so set overlay at point |
| 392 | (move-overlay overlay (point) (point) (current-buffer))) |
| 393 | (t |
| 394 | ;; Nothing was visible, so remove overlay |
| 395 | (delete-overlay overlay))) |
| 396 | (setq mark-active nil)))) |
| 397 | |
| 398 | (defun mouse-sel-primary-to-region (&optional direction) |
| 399 | "Convert PRIMARY overlay to region. |
| 400 | Optional argument DIRECTION specifies the mouse drag direction: a value of |
| 401 | 1 indicates that the mouse was dragged left-to-right, otherwise it was |
| 402 | dragged right-to-left." |
| 403 | (let* ((overlay (mouse-sel-selection-overlay 'PRIMARY)) |
| 404 | (start (overlay-start overlay)) |
| 405 | (end (overlay-end overlay))) |
| 406 | (if (eq start end) |
| 407 | (progn |
| 408 | (if start (goto-char start)) |
| 409 | (deactivate-mark)) |
| 410 | (if (and mouse-sel-leave-point-near-mouse (eq direction 1)) |
| 411 | (progn |
| 412 | (goto-char end) |
| 413 | (push-mark start 'nomsg 'active)) |
| 414 | (goto-char start) |
| 415 | (push-mark end 'nomsg 'active))) |
| 416 | (if transient-mark-mode (delete-overlay overlay)))) |
| 417 | |
| 418 | (defmacro mouse-sel-eval-at-event-end (event &rest forms) |
| 419 | "Evaluate forms at mouse position. |
| 420 | Move to the end position of EVENT, execute FORMS, and restore original |
| 421 | point and window." |
| 422 | `(let ((posn (event-end ,event))) |
| 423 | (if posn (mouse-minibuffer-check ,event)) |
| 424 | (if (and posn (not (windowp (posn-window posn)))) |
| 425 | (error "Cursor not in text area of window")) |
| 426 | (let (orig-window orig-point-marker) |
| 427 | (setq orig-window (selected-window)) |
| 428 | (if posn (select-window (posn-window posn))) |
| 429 | (setq orig-point-marker (point-marker)) |
| 430 | (if (and posn (numberp (posn-point posn))) |
| 431 | (goto-char (posn-point posn))) |
| 432 | (unwind-protect |
| 433 | (progn |
| 434 | ,@forms) |
| 435 | (goto-char (marker-position orig-point-marker)) |
| 436 | (move-marker orig-point-marker nil) |
| 437 | (select-window orig-window))))) |
| 438 | |
| 439 | (put 'mouse-sel-eval-at-event-end 'lisp-indent-hook 1) |
| 440 | |
| 441 | ;;=== Select ============================================================== |
| 442 | |
| 443 | (defun mouse-select (event) |
| 444 | "Set region/selection using the mouse. |
| 445 | |
| 446 | Click sets point & mark to click position. |
| 447 | Dragging extends region/selection. |
| 448 | |
| 449 | Multi-clicking selects word/lines/paragraphs, as determined by |
| 450 | 'mouse-sel-determine-selection-thing. |
| 451 | |
| 452 | Clicking mouse-2 while selecting copies selected text to the kill-ring. |
| 453 | Clicking mouse-1 or mouse-3 kills the selected text. |
| 454 | |
| 455 | This should be bound to a down-mouse event." |
| 456 | (interactive "@e") |
| 457 | (let (direction) |
| 458 | (unwind-protect |
| 459 | (setq direction (mouse-select-internal 'PRIMARY event)) |
| 460 | (mouse-sel-primary-to-region direction)))) |
| 461 | |
| 462 | (defun mouse-select-secondary (event) |
| 463 | "Set secondary selection using the mouse. |
| 464 | |
| 465 | Click sets the start of the secondary selection to click position. |
| 466 | Dragging extends the secondary selection. |
| 467 | |
| 468 | Multi-clicking selects word/lines/paragraphs, as determined by |
| 469 | 'mouse-sel-determine-selection-thing. |
| 470 | |
| 471 | Clicking mouse-2 while selecting copies selected text to the kill-ring. |
| 472 | Clicking mouse-1 or mouse-3 kills the selected text. |
| 473 | |
| 474 | This should be bound to a down-mouse event." |
| 475 | (interactive "e") |
| 476 | (mouse-select-internal 'SECONDARY event)) |
| 477 | |
| 478 | (defun mouse-select-internal (selection event) |
| 479 | "Set SELECTION using the mouse." |
| 480 | (mouse-sel-eval-at-event-end event |
| 481 | (let ((thing-symbol (mouse-sel-selection-thing selection)) |
| 482 | (overlay (mouse-sel-selection-overlay selection))) |
| 483 | (set thing-symbol |
| 484 | (mouse-sel-determine-selection-thing (event-click-count event))) |
| 485 | (let ((object-bounds (bounds-of-thing-at-point |
| 486 | (symbol-value thing-symbol)))) |
| 487 | (if object-bounds |
| 488 | (progn |
| 489 | (move-overlay overlay |
| 490 | (car object-bounds) (cdr object-bounds) |
| 491 | (current-buffer))) |
| 492 | (move-overlay overlay (point) (point) (current-buffer))))) |
| 493 | (mouse-extend-internal selection))) |
| 494 | |
| 495 | ;;=== Extend ============================================================== |
| 496 | |
| 497 | (defun mouse-extend (event) |
| 498 | "Extend region/selection using the mouse." |
| 499 | (interactive "e") |
| 500 | (let ((orig-window (selected-window)) |
| 501 | direction) |
| 502 | (select-window (posn-window (event-end event))) |
| 503 | (unwind-protect |
| 504 | (progn |
| 505 | (mouse-sel-region-to-primary orig-window) |
| 506 | (setq direction (mouse-extend-internal 'PRIMARY event))) |
| 507 | (mouse-sel-primary-to-region direction)))) |
| 508 | |
| 509 | (defun mouse-extend-secondary (event) |
| 510 | "Extend secondary selection using the mouse." |
| 511 | (interactive "e") |
| 512 | (save-window-excursion |
| 513 | (mouse-extend-internal 'SECONDARY event))) |
| 514 | |
| 515 | (defun mouse-extend-internal (selection &optional initial-event) |
| 516 | "Extend specified SELECTION using the mouse. |
| 517 | Track mouse-motion events, adjusting the SELECTION appropriately. |
| 518 | Optional argument INITIAL-EVENT specifies an initial down-mouse event to |
| 519 | process. |
| 520 | |
| 521 | See documentation for mouse-select-internal for more details." |
| 522 | (mouse-sel-eval-at-event-end initial-event |
| 523 | (let ((orig-cursor-type |
| 524 | (cdr (assoc 'cursor-type (frame-parameters (selected-frame)))))) |
| 525 | (unwind-protect |
| 526 | |
| 527 | (let* ((thing-symbol (mouse-sel-selection-thing selection)) |
| 528 | (overlay (mouse-sel-selection-overlay selection)) |
| 529 | (orig-window (selected-window)) |
| 530 | (orig-window-frame (window-frame orig-window)) |
| 531 | (top (nth 1 (window-edges orig-window))) |
| 532 | (bottom (nth 3 (window-edges orig-window))) |
| 533 | (mark-active nil) ; inhibit normal region highlight |
| 534 | (echo-keystrokes 0) ; don't echo mouse events |
| 535 | min max |
| 536 | direction |
| 537 | event) |
| 538 | |
| 539 | ;; Get current bounds of overlay |
| 540 | (if (eq (overlay-buffer overlay) (current-buffer)) |
| 541 | (setq min (overlay-start overlay) |
| 542 | max (overlay-end overlay)) |
| 543 | (setq min (point) |
| 544 | max min) |
| 545 | (set thing-symbol nil)) |
| 546 | |
| 547 | |
| 548 | ;; Bar cursor |
| 549 | (if (fboundp 'modify-frame-parameters) |
| 550 | (modify-frame-parameters (selected-frame) |
| 551 | '((cursor-type . bar)))) |
| 552 | |
| 553 | ;; Handle dragging |
| 554 | (track-mouse |
| 555 | |
| 556 | (while (if initial-event ; Use initial event |
| 557 | (prog1 |
| 558 | (setq event initial-event) |
| 559 | (setq initial-event nil)) |
| 560 | (setq event (read-event)) |
| 561 | (and (consp event) |
| 562 | (memq (car event) '(mouse-movement switch-frame)))) |
| 563 | |
| 564 | (let ((selection-thing (symbol-value thing-symbol)) |
| 565 | (end (event-end event))) |
| 566 | |
| 567 | (cond |
| 568 | |
| 569 | ;; Ignore any movement outside the frame |
| 570 | ((eq (car-safe event) 'switch-frame) nil) |
| 571 | ((and (posn-window end) |
| 572 | (not (eq (let ((posn-w (posn-window end))) |
| 573 | (if (windowp posn-w) |
| 574 | (window-frame posn-w) |
| 575 | posn-w)) |
| 576 | (window-frame orig-window)))) nil) |
| 577 | |
| 578 | ;; Different window, same frame |
| 579 | ((not (eq (posn-window end) orig-window)) |
| 580 | (let ((end-row (cdr (cdr (mouse-position))))) |
| 581 | (cond |
| 582 | ((and end-row (not (bobp)) (< end-row top)) |
| 583 | (mouse-scroll-subr orig-window (- end-row top) |
| 584 | overlay max)) |
| 585 | ((and end-row (not (eobp)) (>= end-row bottom)) |
| 586 | (mouse-scroll-subr orig-window (1+ (- end-row bottom)) |
| 587 | overlay min)) |
| 588 | ))) |
| 589 | |
| 590 | ;; On the mode line |
| 591 | ((eq (posn-point end) 'mode-line) |
| 592 | (mouse-scroll-subr orig-window 1 overlay min)) |
| 593 | |
| 594 | ;; In original window |
| 595 | (t (goto-char (posn-point end))) |
| 596 | |
| 597 | ) |
| 598 | |
| 599 | ;; Determine direction of drag |
| 600 | (cond |
| 601 | ((and (not direction) (not (eq min max))) |
| 602 | (setq direction (if (< (point) (/ (+ min max) 2)) -1 1))) |
| 603 | ((and (not (eq direction -1)) (<= (point) min)) |
| 604 | (setq direction -1)) |
| 605 | ((and (not (eq direction 1)) (>= (point) max)) |
| 606 | (setq direction 1))) |
| 607 | |
| 608 | (if (not selection-thing) nil |
| 609 | |
| 610 | ;; If dragging forward, goal is next character |
| 611 | (if (and (eq direction 1) (not (eobp))) (forward-char 1)) |
| 612 | |
| 613 | ;; Move to start/end of selected thing |
| 614 | (let ((goal (point))) |
| 615 | (goto-char (if (eq 1 direction) min max)) |
| 616 | (condition-case nil |
| 617 | (progn |
| 618 | (while (> (* direction (- goal (point))) 0) |
| 619 | (forward-thing selection-thing direction)) |
| 620 | (let ((end (point))) |
| 621 | (forward-thing selection-thing (- direction)) |
| 622 | (goto-char |
| 623 | (if (> (* direction (- goal (point))) 0) |
| 624 | end (point))))) |
| 625 | (error)))) |
| 626 | |
| 627 | ;; Move overlay |
| 628 | (move-overlay overlay |
| 629 | (if (eq 1 direction) min (point)) |
| 630 | (if (eq -1 direction) max (point)) |
| 631 | (current-buffer)) |
| 632 | |
| 633 | ))) ; end track-mouse |
| 634 | |
| 635 | ;; Finish up after dragging |
| 636 | (let ((overlay-start (overlay-start overlay)) |
| 637 | (overlay-end (overlay-end overlay))) |
| 638 | |
| 639 | ;; Set selection |
| 640 | (if (not (eq overlay-start overlay-end)) |
| 641 | (mouse-sel-set-selection |
| 642 | selection |
| 643 | (buffer-substring overlay-start overlay-end))) |
| 644 | |
| 645 | ;; Handle copy/kill |
| 646 | (let (this-command) |
| 647 | (cond |
| 648 | ((eq (event-basic-type last-input-event) 'mouse-2) |
| 649 | (copy-region-as-kill overlay-start overlay-end) |
| 650 | (read-event) (read-event)) |
| 651 | ((and (memq (event-basic-type last-input-event) |
| 652 | '(mouse-1 mouse-3)) |
| 653 | (memq 'down (event-modifiers last-input-event))) |
| 654 | (kill-region overlay-start overlay-end) |
| 655 | (move-overlay overlay overlay-start overlay-start) |
| 656 | (read-event) (read-event)) |
| 657 | ((and (eq (event-basic-type last-input-event) 'mouse-3) |
| 658 | (memq 'double (event-modifiers last-input-event))) |
| 659 | (kill-region overlay-start overlay-end) |
| 660 | (move-overlay overlay overlay-start overlay-start))))) |
| 661 | |
| 662 | direction) |
| 663 | |
| 664 | ;; Restore cursor |
| 665 | (if (fboundp 'modify-frame-parameters) |
| 666 | (modify-frame-parameters |
| 667 | (selected-frame) (list (cons 'cursor-type orig-cursor-type)))) |
| 668 | |
| 669 | )))) |
| 670 | |
| 671 | ;;=== Paste =============================================================== |
| 672 | |
| 673 | (defun mouse-insert-selection (event arg) |
| 674 | "Insert the contents of the PRIMARY selection at mouse click. |
| 675 | If `mouse-yank-at-point' is non-nil, insert at point instead." |
| 676 | (interactive "e\nP") |
| 677 | (if (eq mouse-sel-default-bindings 'interprogram-cut-paste) |
| 678 | (mouse-yank-at-click event arg) |
| 679 | (mouse-insert-selection-internal 'PRIMARY event))) |
| 680 | |
| 681 | (defun mouse-insert-secondary (event) |
| 682 | "Insert the contents of the SECONDARY selection at mouse click. |
| 683 | If `mouse-yank-at-point' is non-nil, insert at point instead." |
| 684 | (interactive "e") |
| 685 | (mouse-insert-selection-internal 'SECONDARY event)) |
| 686 | |
| 687 | (defun mouse-insert-selection-internal (selection event) |
| 688 | "Insert the contents of the named SELECTION at mouse click. |
| 689 | If `mouse-yank-at-point' is non-nil, insert at point instead." |
| 690 | (unless mouse-yank-at-point |
| 691 | (mouse-set-point event)) |
| 692 | (when mouse-sel-get-selection-function |
| 693 | (push-mark (point) 'nomsg) |
| 694 | (insert (or (funcall mouse-sel-get-selection-function selection) "")))) |
| 695 | |
| 696 | ;;=== Handle loss of selections =========================================== |
| 697 | |
| 698 | (defun mouse-sel-lost-selection-hook (selection) |
| 699 | "Remove the overlay for a lost selection." |
| 700 | (let ((overlay (mouse-sel-selection-overlay selection))) |
| 701 | (delete-overlay overlay))) |
| 702 | |
| 703 | (provide 'mouse-sel) |
| 704 | |
| 705 | ;;; mouse-sel.el ends here |