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e42ebbf2 | 1 | ;;; mouse-sel.el --- multi-click selection support |
1a2b6c52 | 2 | |
c8ccffb1 | 3 | ;; Copyright (C) 1993, 1994, 1995, 2001, 2002, 2003, 2004, 2005, 2006, |
5df4f04c | 4 | ;; 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc. |
1a2b6c52 | 5 | |
9ae4c925 | 6 | ;; Author: Mike Williams <mdub@bigfoot.com> |
1a2b6c52 | 7 | ;; Keywords: mouse |
1a2b6c52 RS |
8 | |
9 | ;; This file is part of GNU Emacs. | |
10 | ||
eb3fa2cf | 11 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
1a2b6c52 | 12 | ;; it under the terms of the GNU General Public License as published by |
eb3fa2cf GM |
13 | ;; the Free Software Foundation, either version 3 of the License, or |
14 | ;; (at your option) any later version. | |
1a2b6c52 RS |
15 | |
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
b578f267 | 21 | ;; You should have received a copy of the GNU General Public License |
eb3fa2cf | 22 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
b578f267 | 23 | |
07b3798c | 24 | ;;; Commentary: |
b578f267 | 25 | |
1a2b6c52 RS |
26 | ;; This module provides multi-click mouse support for GNU Emacs versions |
27 | ;; 19.18 and later. I've tried to make it behave more like standard X | |
28 | ;; clients (eg. xterm) than the default Emacs 19 mouse selection handlers. | |
29 | ;; Basically: | |
30 | ;; | |
31 | ;; * Clicking mouse-1 starts (cancels) selection, dragging extends it. | |
32 | ;; | |
33 | ;; * Clicking or dragging mouse-3 extends the selection as well. | |
34 | ;; | |
35 | ;; * Double-clicking on word constituents selects words. | |
36 | ;; Double-clicking on symbol constituents selects symbols. | |
37 | ;; Double-clicking on quotes or parentheses selects sexps. | |
38 | ;; Double-clicking on whitespace selects whitespace. | |
39 | ;; Triple-clicking selects lines. | |
f2506826 | 40 | ;; Quad-clicking selects paragraphs. |
1a2b6c52 RS |
41 | ;; |
42 | ;; * Selecting sets the region & X primary selection, but does NOT affect | |
43 | ;; the kill-ring. Because the mouse handlers set the primary selection | |
44 | ;; directly, mouse-sel sets the variables interprogram-cut-function | |
45 | ;; and interprogram-paste-function to nil. | |
46 | ;; | |
f2506826 RS |
47 | ;; * Clicking mouse-2 inserts the contents of the primary selection at |
48 | ;; the mouse position (or point, if mouse-yank-at-point is non-nil). | |
1a2b6c52 | 49 | ;; |
6a2e3631 | 50 | ;; * Pressing mouse-2 while selecting or extending copies selection |
1a2b6c52 | 51 | ;; to the kill ring. Pressing mouse-1 or mouse-3 kills it. |
8a946354 | 52 | ;; |
6a2e3631 | 53 | ;; * Double-clicking mouse-3 also kills selection. |
8a946354 | 54 | ;; |
f2506826 RS |
55 | ;; * M-mouse-1, M-mouse-2 & M-mouse-3 work similarly to mouse-1, mouse-2 |
56 | ;; & mouse-3, but operate on the X secondary selection rather than the | |
57 | ;; primary selection and region. | |
1a2b6c52 | 58 | ;; |
6a2e3631 RS |
59 | ;; This module requires my thingatpt.el module, which it uses to find the |
60 | ;; bounds of words, lines, sexps, etc. | |
1a2b6c52 RS |
61 | ;; |
62 | ;; Thanks to KevinB@bartley.demon.co.uk for his useful input. | |
63 | ;; | |
6a2e3631 RS |
64 | ;;--- Customisation ------------------------------------------------------- |
65 | ;; | |
66 | ;; * You may want to use none or more of following: | |
1a2b6c52 RS |
67 | ;; |
68 | ;; ;; Enable region highlight | |
69 | ;; (transient-mark-mode 1) | |
70 | ;; | |
71 | ;; ;; But only in the selected window | |
72 | ;; (setq highlight-nonselected-windows nil) | |
8a946354 | 73 | ;; |
1a2b6c52 RS |
74 | ;; ;; Enable pending-delete |
75 | ;; (delete-selection-mode 1) | |
76 | ;; | |
f77e1e4b | 77 | ;; * You can control the way mouse-sel binds its keys by setting the value |
1a2b6c52 RS |
78 | ;; of mouse-sel-default-bindings before loading mouse-sel. |
79 | ;; | |
80 | ;; (a) If mouse-sel-default-bindings = t (the default) | |
8a946354 | 81 | ;; |
f2506826 | 82 | ;; Mouse sets and insert selection |
1a2b6c52 RS |
83 | ;; mouse-1 mouse-select |
84 | ;; mouse-2 mouse-insert-selection | |
f2506826 | 85 | ;; mouse-3 mouse-extend |
1a2b6c52 RS |
86 | ;; |
87 | ;; Selection/kill-ring interaction is disabled | |
88 | ;; interprogram-cut-function = nil | |
89 | ;; interprogram-paste-function = nil | |
90 | ;; | |
91 | ;; (b) If mouse-sel-default-bindings = 'interprogram-cut-paste | |
8a946354 | 92 | ;; |
1a2b6c52 | 93 | ;; Mouse sets selection, and pastes from kill-ring |
f2506826 | 94 | ;; mouse-1 mouse-select |
640201f8 | 95 | ;; mouse-2 mouse-insert-selection |
f2506826 | 96 | ;; mouse-3 mouse-extend |
640201f8 | 97 | ;; In this mode, mouse-insert-selection just calls mouse-yank-at-click. |
8a946354 | 98 | ;; |
1a2b6c52 RS |
99 | ;; Selection/kill-ring interaction is retained |
100 | ;; interprogram-cut-function = x-select-text | |
6d7cc563 | 101 | ;; interprogram-paste-function = x-selection-value |
8a946354 | 102 | ;; |
1a2b6c52 RS |
103 | ;; What you lose is the ability to select some text in |
104 | ;; delete-selection-mode and yank over the top of it. | |
8a946354 | 105 | ;; |
1a2b6c52 RS |
106 | ;; (c) If mouse-sel-default-bindings = nil, no bindings are made. |
107 | ;; | |
cd1f32a6 RS |
108 | ;; * By default, mouse-insert-selection (mouse-2) inserts the selection at |
109 | ;; the mouse position. You can tell it to insert at point instead with: | |
110 | ;; | |
6b4dd332 | 111 | ;; (setq mouse-yank-at-point t) |
cd1f32a6 | 112 | ;; |
1a2b6c52 RS |
113 | ;; * I like to leave point at the end of the region nearest to where the |
114 | ;; mouse was, even though this makes region highlighting mis-leading (the | |
115 | ;; cursor makes it look like one extra character is selected). You can | |
fffa137c | 116 | ;; disable this behavior with: |
1a2b6c52 RS |
117 | ;; |
118 | ;; (setq mouse-sel-leave-point-near-mouse nil) | |
119 | ;; | |
f2506826 RS |
120 | ;; * By default, mouse-select cycles the click count after 4 clicks. That |
121 | ;; is, clicking mouse-1 five times has the same effect as clicking it | |
122 | ;; once, clicking six times has the same effect as clicking twice, etc. | |
fffa137c | 123 | ;; Disable this behavior with: |
1a2b6c52 RS |
124 | ;; |
125 | ;; (setq mouse-sel-cycle-clicks nil) | |
126 | ;; | |
f2506826 RS |
127 | ;; * The variables mouse-sel-{set,get}-selection-function control how the |
128 | ;; selection is handled. Under X Windows, these variables default so | |
1a2b6c52 RS |
129 | ;; that the X primary selection is used. Under other windowing systems, |
130 | ;; alternate functions are used, which simply store the selection value | |
131 | ;; in a variable. | |
1a2b6c52 | 132 | |
b578f267 | 133 | ;;; Code: |
1a2b6c52 | 134 | |
1a2b6c52 RS |
135 | (require 'mouse) |
136 | (require 'thingatpt) | |
1a2b6c52 | 137 | |
ad3f1e65 SM |
138 | (eval-when-compile |
139 | (require 'cl)) | |
140 | ||
1a2b6c52 RS |
141 | ;;=== User Variables ====================================================== |
142 | ||
ad3f1e65 SM |
143 | (defgroup mouse-sel nil |
144 | "Mouse selection enhancement." | |
145 | :group 'mouse) | |
146 | ||
ad3f1e65 | 147 | (defcustom mouse-sel-leave-point-near-mouse t |
9201cc28 | 148 | "Leave point near last mouse position. |
f2506826 | 149 | If non-nil, \\[mouse-select] and \\[mouse-extend] will leave point at the end |
1a2b6c52 | 150 | of the region nearest to where the mouse last was. |
ad3f1e65 SM |
151 | If nil, point will always be placed at the beginning of the region." |
152 | :type 'boolean | |
153 | :group 'mouse-sel) | |
154 | ||
155 | (defcustom mouse-sel-cycle-clicks t | |
9201cc28 | 156 | "If non-nil, \\[mouse-select] cycles the click-counts after 4 clicks." |
ad3f1e65 SM |
157 | :type 'boolean |
158 | :group 'mouse-sel) | |
159 | ||
160 | (defcustom mouse-sel-default-bindings t | |
9201cc28 | 161 | "Control mouse bindings." |
ad3f1e65 | 162 | :type '(choice (const :tag "none" nil) |
21cabb0f AS |
163 | (const :tag "cut and paste" interprogram-cut-paste) |
164 | (other :tag "default bindings" t)) | |
ad3f1e65 SM |
165 | :group 'mouse-sel) |
166 | ||
640201f8 SM |
167 | ;;=== Key bindings ======================================================== |
168 | ||
169 | (defconst mouse-sel-bound-events | |
170 | '(;; Primary selection bindings. | |
171 | ;; | |
172 | ;; Bind keys to `ignore' instead of unsetting them because modes may | |
173 | ;; bind `down-mouse-1', for instance, without binding `mouse-1'. | |
174 | ;; If we unset `mouse-1', this leads to a bitch_at_user when the | |
175 | ;; mouse goes up because no matching binding is found for that. | |
176 | ([mouse-1] . ignore) | |
177 | ([drag-mouse-1] . ignore) | |
178 | ([mouse-3] . ignore) | |
179 | ([down-mouse-1] . mouse-select) | |
180 | ([down-mouse-3] . mouse-extend) | |
181 | ([mouse-2] . mouse-insert-selection) | |
182 | ;; Secondary selection bindings. | |
183 | ([M-mouse-1] . ignore) | |
184 | ([M-drag-mouse-1] . ignore) | |
185 | ([M-mouse-3] . ignore) | |
186 | ([M-down-mouse-1] . mouse-select-secondary) | |
187 | ([M-mouse-2] . mouse-insert-secondary) | |
188 | ([M-down-mouse-3] . mouse-extend-secondary)) | |
189 | "An alist of events that `mouse-sel-mode' binds.") | |
190 | ||
ad3f1e65 SM |
191 | ;;=== User Command ======================================================== |
192 | ||
387f00e6 RS |
193 | (defvar mouse-sel-has-been-enabled nil |
194 | "Non-nil if Mouse Sel mode has been enabled at least once.") | |
195 | ||
640201f8 SM |
196 | (defvar mouse-sel-original-bindings nil) |
197 | (defvar mouse-sel-original-interprogram-cut-function nil) | |
caebc99b | 198 | (defvar mouse-sel-original-interprogram-paste-function nil) |
640201f8 | 199 | |
ad3f1e65 | 200 | ;;;###autoload |
640201f8 | 201 | (define-minor-mode mouse-sel-mode |
ad3f1e65 SM |
202 | "Toggle Mouse Sel mode. |
203 | With prefix ARG, turn Mouse Sel mode on if and only if ARG is positive. | |
204 | Returns the new status of Mouse Sel mode (non-nil means on). | |
205 | ||
206 | When Mouse Sel mode is enabled, mouse selection is enhanced in various ways: | |
207 | ||
208 | - Clicking mouse-1 starts (cancels) selection, dragging extends it. | |
209 | ||
210 | - Clicking or dragging mouse-3 extends the selection as well. | |
211 | ||
212 | - Double-clicking on word constituents selects words. | |
213 | Double-clicking on symbol constituents selects symbols. | |
214 | Double-clicking on quotes or parentheses selects sexps. | |
215 | Double-clicking on whitespace selects whitespace. | |
216 | Triple-clicking selects lines. | |
217 | Quad-clicking selects paragraphs. | |
218 | ||
219 | - Selecting sets the region & X primary selection, but does NOT affect | |
640201f8 | 220 | the `kill-ring', nor do the kill-ring functions change the X selection. |
9eebe311 | 221 | Because the mouse handlers set the primary selection directly, |
640201f8 SM |
222 | mouse-sel sets the variables `interprogram-cut-function' and |
223 | `interprogram-paste-function' to nil. | |
1a2b6c52 | 224 | |
ad3f1e65 | 225 | - Clicking mouse-2 inserts the contents of the primary selection at |
f7542b92 | 226 | the mouse position (or point, if `mouse-yank-at-point' is non-nil). |
1a2b6c52 | 227 | |
ad3f1e65 SM |
228 | - Pressing mouse-2 while selecting or extending copies selection |
229 | to the kill ring. Pressing mouse-1 or mouse-3 kills it. | |
230 | ||
231 | - Double-clicking mouse-3 also kills selection. | |
232 | ||
233 | - M-mouse-1, M-mouse-2 & M-mouse-3 work similarly to mouse-1, mouse-2 | |
234 | & mouse-3, but operate on the X secondary selection rather than the | |
235 | primary selection and region." | |
640201f8 | 236 | :global t |
3acd2c4f | 237 | :group 'mouse-sel |
640201f8 SM |
238 | (if mouse-sel-mode |
239 | (progn | |
92280c32 CY |
240 | ;; If mouse-2 has never been done by the user, initialize the |
241 | ;; `event-kind' property to ensure that `follow-link' clicks | |
242 | ;; are interpreted correctly. | |
243 | (put 'mouse-2 'event-kind 'mouse-click) | |
a122087b | 244 | (add-hook 'x-lost-selection-functions 'mouse-sel-lost-selection-hook) |
640201f8 SM |
245 | (when mouse-sel-default-bindings |
246 | ;; Save original bindings and replace them with new ones. | |
247 | (setq mouse-sel-original-bindings | |
248 | (mapcar (lambda (binding) | |
249 | (let ((event (car binding))) | |
250 | (prog1 (cons event (lookup-key global-map event)) | |
251 | (global-set-key event (cdr binding))))) | |
252 | mouse-sel-bound-events)) | |
253 | ;; Update interprogram functions. | |
254 | (setq mouse-sel-original-interprogram-cut-function | |
255 | interprogram-cut-function | |
256 | mouse-sel-original-interprogram-paste-function | |
387f00e6 RS |
257 | interprogram-paste-function |
258 | mouse-sel-has-been-enabled t) | |
640201f8 SM |
259 | (unless (eq mouse-sel-default-bindings 'interprogram-cut-paste) |
260 | (setq interprogram-cut-function nil | |
261 | interprogram-paste-function nil)))) | |
ad3f1e65 | 262 | |
4bc65152 | 263 | ;; Restore original bindings |
a122087b | 264 | (remove-hook 'x-lost-selection-functions 'mouse-sel-lost-selection-hook) |
640201f8 SM |
265 | (dolist (binding mouse-sel-original-bindings) |
266 | (global-set-key (car binding) (cdr binding))) | |
01fce6ab RS |
267 | ;; Restore the old values of these variables, |
268 | ;; only if they were actually saved previously. | |
387f00e6 RS |
269 | (if mouse-sel-has-been-enabled |
270 | (setq interprogram-cut-function | |
271 | mouse-sel-original-interprogram-cut-function | |
272 | interprogram-paste-function | |
273 | mouse-sel-original-interprogram-paste-function)))) | |
1a2b6c52 | 274 | |
f2506826 RS |
275 | ;;=== Internal Variables/Constants ======================================== |
276 | ||
8a946354 | 277 | (defvar mouse-sel-primary-thing nil |
f2506826 RS |
278 | "Type of PRIMARY selection in current buffer.") |
279 | (make-variable-buffer-local 'mouse-sel-primary-thing) | |
280 | ||
8a946354 | 281 | (defvar mouse-sel-secondary-thing nil |
f2506826 RS |
282 | "Type of SECONDARY selection in current buffer.") |
283 | (make-variable-buffer-local 'mouse-sel-secondary-thing) | |
284 | ||
285 | ;; Ensure that secondary overlay is defined | |
ad3f1e65 | 286 | (unless (overlayp mouse-secondary-overlay) |
f2506826 RS |
287 | (setq mouse-secondary-overlay (make-overlay 1 1)) |
288 | (overlay-put mouse-secondary-overlay 'face 'secondary-selection)) | |
1a2b6c52 | 289 | |
f2506826 | 290 | (defconst mouse-sel-selection-alist |
5592c08f | 291 | '((SECONDARY mouse-secondary-overlay mouse-sel-secondary-thing)) |
f7542b92 SM |
292 | "Alist associating selections with variables. |
293 | Each element is of the form: | |
1a2b6c52 | 294 | |
f2506826 | 295 | (SELECTION-NAME OVERLAY-SYMBOL SELECTION-THING-SYMBOL) |
1a2b6c52 | 296 | |
f2506826 RS |
297 | where SELECTION-NAME = name of selection |
298 | OVERLAY-SYMBOL = name of variable containing overlay to use | |
299 | SELECTION-THING-SYMBOL = name of variable where the current selection | |
300 | type for this selection should be stored.") | |
8a946354 | 301 | |
c8ccffb1 | 302 | (declare-function x-select-text "term/common-win" (text)) |
aa360da1 | 303 | |
ad3f1e65 SM |
304 | (defvar mouse-sel-set-selection-function |
305 | (if (eq mouse-sel-default-bindings 'interprogram-cut-paste) | |
306 | 'x-set-selection | |
307 | (lambda (selection value) | |
308 | (if (eq selection 'PRIMARY) | |
309 | (x-select-text value) | |
310 | (x-set-selection selection value)))) | |
1a2b6c52 | 311 | "Function to call to set selection. |
f2506826 RS |
312 | Called with two arguments: |
313 | ||
314 | SELECTION, the name of the selection concerned, and | |
0a6231f5 | 315 | VALUE, the text to store. |
ad3f1e65 | 316 | |
c8ccffb1 | 317 | This sets the selection, unless `mouse-sel-default-bindings' |
45240125 | 318 | is `interprogram-cut-paste'.") |
1a2b6c52 | 319 | |
6d7cc563 | 320 | (declare-function x-selection-value "term/x-win" ()) |
aa360da1 | 321 | |
1a2b6c52 | 322 | (defvar mouse-sel-get-selection-function |
ad3f1e65 SM |
323 | (lambda (selection) |
324 | (if (eq selection 'PRIMARY) | |
6d7cc563 | 325 | (or (x-selection-value) |
497cfacf JPW |
326 | (bound-and-true-p x-last-selected-text) |
327 | (bound-and-true-p x-last-selected-text-primary)) | |
ad3f1e65 | 328 | (x-get-selection selection))) |
1a2b6c52 | 329 | "Function to call to get the selection. |
f2506826 | 330 | Called with one argument: |
1a2b6c52 | 331 | |
f2506826 RS |
332 | SELECTION: the name of the selection concerned.") |
333 | ||
f2506826 RS |
334 | ;;=== Support/access functions ============================================ |
335 | ||
336 | (defun mouse-sel-determine-selection-thing (nclicks) | |
337 | "Determine what `thing' `mouse-sel' should operate on. | |
338 | The first argument is NCLICKS, is the number of consecutive | |
339 | mouse clicks at the same position. | |
340 | ||
341 | Double-clicking on word constituents selects words. | |
342 | Double-clicking on symbol constituents selects symbols. | |
343 | Double-clicking on quotes or parentheses selects sexps. | |
344 | Double-clicking on whitespace selects whitespace. | |
345 | Triple-clicking selects lines. | |
346 | Quad-clicking selects paragraphs. | |
347 | ||
348 | Feel free to re-define this function to support your own desired | |
349 | multi-click semantics." | |
1a2b6c52 | 350 | (let* ((next-char (char-after (point))) |
f2506826 | 351 | (char-syntax (if next-char (char-syntax next-char)))) |
8a946354 | 352 | (if mouse-sel-cycle-clicks |
f2506826 | 353 | (setq nclicks (1+ (% (1- nclicks) 4)))) |
1a2b6c52 RS |
354 | (cond |
355 | ((= nclicks 1) nil) | |
f2506826 RS |
356 | ((= nclicks 3) 'line) |
357 | ((>= nclicks 4) 'paragraph) | |
1a2b6c52 | 358 | ((memq char-syntax '(?\( ?\) ?\" ?')) 'sexp) |
69aac59d | 359 | ((memq next-char '(?\s ?\t ?\n)) 'whitespace) |
1a2b6c52 RS |
360 | ((eq char-syntax ?_) 'symbol) |
361 | ((eq char-syntax ?w) 'word)))) | |
362 | ||
f2506826 RS |
363 | (defun mouse-sel-set-selection (selection value) |
364 | "Set the specified SELECTION to VALUE." | |
365 | (if mouse-sel-set-selection-function | |
366 | (funcall mouse-sel-set-selection-function selection value) | |
367 | (put 'mouse-sel-internal-selection selection value))) | |
368 | ||
369 | (defun mouse-sel-get-selection (selection) | |
370 | "Get the value of the specified SELECTION." | |
371 | (if mouse-sel-get-selection-function | |
372 | (funcall mouse-sel-get-selection-function selection) | |
373 | (get 'mouse-sel-internal-selection selection))) | |
374 | ||
f2506826 RS |
375 | (defun mouse-sel-selection-overlay (selection) |
376 | "Return overlay corresponding to SELECTION." | |
377 | (let ((symbol (nth 1 (assoc selection mouse-sel-selection-alist)))) | |
378 | (or symbol (error "No overlay corresponding to %s selection" selection)) | |
379 | (symbol-value symbol))) | |
380 | ||
381 | (defun mouse-sel-selection-thing (selection) | |
382 | "Return overlay corresponding to SELECTION." | |
383 | (let ((symbol (nth 2 (assoc selection mouse-sel-selection-alist)))) | |
384 | (or symbol (error "No symbol corresponding to %s selection" selection)) | |
385 | symbol)) | |
386 | ||
387 | (defun mouse-sel-region-to-primary (orig-window) | |
388 | "Convert region to PRIMARY overlay and deactivate region. | |
8a946354 SS |
389 | Argument ORIG-WINDOW specifies the window the cursor was in when the |
390 | originating command was issued, and is used to determine whether the | |
f2506826 RS |
391 | region was visible or not." |
392 | (if transient-mark-mode | |
393 | (let ((overlay (mouse-sel-selection-overlay 'PRIMARY))) | |
394 | (cond | |
8a946354 SS |
395 | ((and mark-active |
396 | (or highlight-nonselected-windows | |
f2506826 RS |
397 | (eq orig-window (selected-window)))) |
398 | ;; Region was visible, so convert region to overlay | |
8a946354 | 399 | (move-overlay overlay (region-beginning) (region-end) |
f2506826 RS |
400 | (current-buffer))) |
401 | ((eq orig-window (selected-window)) | |
402 | ;; Point was visible, so set overlay at point | |
403 | (move-overlay overlay (point) (point) (current-buffer))) | |
404 | (t | |
405 | ;; Nothing was visible, so remove overlay | |
406 | (delete-overlay overlay))) | |
407 | (setq mark-active nil)))) | |
408 | ||
409 | (defun mouse-sel-primary-to-region (&optional direction) | |
410 | "Convert PRIMARY overlay to region. | |
411 | Optional argument DIRECTION specifies the mouse drag direction: a value of | |
412 | 1 indicates that the mouse was dragged left-to-right, otherwise it was | |
413 | dragged right-to-left." | |
414 | (let* ((overlay (mouse-sel-selection-overlay 'PRIMARY)) | |
415 | (start (overlay-start overlay)) | |
416 | (end (overlay-end overlay))) | |
417 | (if (eq start end) | |
418 | (progn | |
419 | (if start (goto-char start)) | |
420 | (deactivate-mark)) | |
421 | (if (and mouse-sel-leave-point-near-mouse (eq direction 1)) | |
422 | (progn | |
423 | (goto-char end) | |
424 | (push-mark start 'nomsg 'active)) | |
425 | (goto-char start) | |
426 | (push-mark end 'nomsg 'active))) | |
427 | (if transient-mark-mode (delete-overlay overlay)))) | |
428 | ||
429 | (defmacro mouse-sel-eval-at-event-end (event &rest forms) | |
430 | "Evaluate forms at mouse position. | |
431 | Move to the end position of EVENT, execute FORMS, and restore original | |
432 | point and window." | |
8a946354 SS |
433 | `(let ((posn (event-end ,event))) |
434 | (if posn (mouse-minibuffer-check ,event)) | |
435 | (if (and posn (not (windowp (posn-window posn)))) | |
436 | (error "Cursor not in text area of window")) | |
437 | (let (orig-window orig-point-marker) | |
438 | (setq orig-window (selected-window)) | |
439 | (if posn (select-window (posn-window posn))) | |
440 | (setq orig-point-marker (point-marker)) | |
441 | (if (and posn (numberp (posn-point posn))) | |
442 | (goto-char (posn-point posn))) | |
443 | (unwind-protect | |
444 | (progn | |
445 | ,@forms) | |
446 | (goto-char (marker-position orig-point-marker)) | |
447 | (move-marker orig-point-marker nil) | |
448 | (select-window orig-window))))) | |
f2506826 RS |
449 | |
450 | (put 'mouse-sel-eval-at-event-end 'lisp-indent-hook 1) | |
451 | ||
452 | ;;=== Select ============================================================== | |
453 | ||
454 | (defun mouse-select (event) | |
1a2b6c52 RS |
455 | "Set region/selection using the mouse. |
456 | ||
f2506826 | 457 | Click sets point & mark to click position. |
1a2b6c52 RS |
458 | Dragging extends region/selection. |
459 | ||
8a946354 | 460 | Multi-clicking selects word/lines/paragraphs, as determined by |
f2506826 | 461 | 'mouse-sel-determine-selection-thing. |
1a2b6c52 | 462 | |
f2506826 RS |
463 | Clicking mouse-2 while selecting copies selected text to the kill-ring. |
464 | Clicking mouse-1 or mouse-3 kills the selected text. | |
1a2b6c52 RS |
465 | |
466 | This should be bound to a down-mouse event." | |
f2506826 | 467 | (interactive "@e") |
3f00c08b | 468 | (let (select) |
f2506826 | 469 | (unwind-protect |
3f00c08b KS |
470 | (setq select (mouse-select-internal 'PRIMARY event)) |
471 | (if (and select (listp select)) | |
472 | (push (cons 'mouse-2 (cdr event)) unread-command-events) | |
473 | (mouse-sel-primary-to-region select))))) | |
f2506826 RS |
474 | |
475 | (defun mouse-select-secondary (event) | |
ad3f1e65 | 476 | "Set secondary selection using the mouse. |
f2506826 RS |
477 | |
478 | Click sets the start of the secondary selection to click position. | |
479 | Dragging extends the secondary selection. | |
1a2b6c52 | 480 | |
8a946354 | 481 | Multi-clicking selects word/lines/paragraphs, as determined by |
f2506826 | 482 | 'mouse-sel-determine-selection-thing. |
1a2b6c52 | 483 | |
f2506826 RS |
484 | Clicking mouse-2 while selecting copies selected text to the kill-ring. |
485 | Clicking mouse-1 or mouse-3 kills the selected text. | |
1a2b6c52 RS |
486 | |
487 | This should be bound to a down-mouse event." | |
ad3f1e65 | 488 | (interactive "e") |
f2506826 RS |
489 | (mouse-select-internal 'SECONDARY event)) |
490 | ||
491 | (defun mouse-select-internal (selection event) | |
3f00c08b KS |
492 | "Set SELECTION using the mouse, with EVENT as the initial down-event. |
493 | Normally, this returns the direction in which the selection was | |
494 | made: a value of 1 indicates that the mouse was dragged | |
495 | left-to-right, otherwise it was dragged right-to-left. | |
496 | ||
497 | However, if `mouse-1-click-follows-link' is non-nil and the | |
498 | subsequent mouse events specify following a link, this returns | |
499 | the final mouse-event. In that case, the selection is not set." | |
f2506826 RS |
500 | (mouse-sel-eval-at-event-end event |
501 | (let ((thing-symbol (mouse-sel-selection-thing selection)) | |
502 | (overlay (mouse-sel-selection-overlay selection))) | |
503 | (set thing-symbol | |
504 | (mouse-sel-determine-selection-thing (event-click-count event))) | |
505 | (let ((object-bounds (bounds-of-thing-at-point | |
506 | (symbol-value thing-symbol)))) | |
507 | (if object-bounds | |
508 | (progn | |
509 | (move-overlay overlay | |
510 | (car object-bounds) (cdr object-bounds) | |
511 | (current-buffer))) | |
512 | (move-overlay overlay (point) (point) (current-buffer))))) | |
3f00c08b KS |
513 | (catch 'follow-link |
514 | (mouse-extend-internal selection event t)))) | |
f2506826 RS |
515 | |
516 | ;;=== Extend ============================================================== | |
517 | ||
518 | (defun mouse-extend (event) | |
519 | "Extend region/selection using the mouse." | |
1a2b6c52 | 520 | (interactive "e") |
f2506826 RS |
521 | (let ((orig-window (selected-window)) |
522 | direction) | |
523 | (select-window (posn-window (event-end event))) | |
1a2b6c52 | 524 | (unwind-protect |
f2506826 RS |
525 | (progn |
526 | (mouse-sel-region-to-primary orig-window) | |
527 | (setq direction (mouse-extend-internal 'PRIMARY event))) | |
528 | (mouse-sel-primary-to-region direction)))) | |
529 | ||
530 | (defun mouse-extend-secondary (event) | |
531 | "Extend secondary selection using the mouse." | |
532 | (interactive "e") | |
533 | (save-window-excursion | |
534 | (mouse-extend-internal 'SECONDARY event))) | |
535 | ||
3f00c08b | 536 | (defun mouse-extend-internal (selection &optional initial-event no-process) |
f2506826 RS |
537 | "Extend specified SELECTION using the mouse. |
538 | Track mouse-motion events, adjusting the SELECTION appropriately. | |
3f00c08b KS |
539 | Optional argument INITIAL-EVENT specifies an initial down-mouse event. |
540 | Optional argument NO-PROCESS means not to process the initial | |
541 | event. | |
f2506826 RS |
542 | |
543 | See documentation for mouse-select-internal for more details." | |
544 | (mouse-sel-eval-at-event-end initial-event | |
8a946354 | 545 | (let ((orig-cursor-type |
f2506826 RS |
546 | (cdr (assoc 'cursor-type (frame-parameters (selected-frame)))))) |
547 | (unwind-protect | |
548 | ||
549 | (let* ((thing-symbol (mouse-sel-selection-thing selection)) | |
550 | (overlay (mouse-sel-selection-overlay selection)) | |
551 | (orig-window (selected-window)) | |
552 | (orig-window-frame (window-frame orig-window)) | |
553 | (top (nth 1 (window-edges orig-window))) | |
554 | (bottom (nth 3 (window-edges orig-window))) | |
555 | (mark-active nil) ; inhibit normal region highlight | |
556 | (echo-keystrokes 0) ; don't echo mouse events | |
557 | min max | |
558 | direction | |
559 | event) | |
560 | ||
561 | ;; Get current bounds of overlay | |
562 | (if (eq (overlay-buffer overlay) (current-buffer)) | |
563 | (setq min (overlay-start overlay) | |
564 | max (overlay-end overlay)) | |
565 | (setq min (point) | |
566 | max min) | |
567 | (set thing-symbol nil)) | |
8a946354 | 568 | |
f2506826 RS |
569 | |
570 | ;; Bar cursor | |
571 | (if (fboundp 'modify-frame-parameters) | |
572 | (modify-frame-parameters (selected-frame) | |
573 | '((cursor-type . bar)))) | |
8a946354 | 574 | |
f2506826 RS |
575 | ;; Handle dragging |
576 | (track-mouse | |
8a946354 | 577 | |
3f00c08b KS |
578 | (while (if (and initial-event (not no-process)) |
579 | ;; Use initial event | |
f2506826 RS |
580 | (prog1 |
581 | (setq event initial-event) | |
582 | (setq initial-event nil)) | |
583 | (setq event (read-event)) | |
584 | (and (consp event) | |
585 | (memq (car event) '(mouse-movement switch-frame)))) | |
8a946354 | 586 | |
f2506826 RS |
587 | (let ((selection-thing (symbol-value thing-symbol)) |
588 | (end (event-end event))) | |
8a946354 | 589 | |
f2506826 | 590 | (cond |
8a946354 | 591 | |
f2506826 RS |
592 | ;; Ignore any movement outside the frame |
593 | ((eq (car-safe event) 'switch-frame) nil) | |
594 | ((and (posn-window end) | |
595 | (not (eq (let ((posn-w (posn-window end))) | |
596 | (if (windowp posn-w) | |
597 | (window-frame posn-w) | |
598 | posn-w)) | |
599 | (window-frame orig-window)))) nil) | |
8a946354 | 600 | |
f2506826 RS |
601 | ;; Different window, same frame |
602 | ((not (eq (posn-window end) orig-window)) | |
603 | (let ((end-row (cdr (cdr (mouse-position))))) | |
604 | (cond | |
605 | ((and end-row (not (bobp)) (< end-row top)) | |
606 | (mouse-scroll-subr orig-window (- end-row top) | |
607 | overlay max)) | |
608 | ((and end-row (not (eobp)) (>= end-row bottom)) | |
609 | (mouse-scroll-subr orig-window (1+ (- end-row bottom)) | |
610 | overlay min)) | |
611 | ))) | |
8a946354 | 612 | |
f2506826 RS |
613 | ;; On the mode line |
614 | ((eq (posn-point end) 'mode-line) | |
615 | (mouse-scroll-subr orig-window 1 overlay min)) | |
8a946354 | 616 | |
f2506826 RS |
617 | ;; In original window |
618 | (t (goto-char (posn-point end))) | |
8a946354 | 619 | |
f2506826 | 620 | ) |
8a946354 | 621 | |
f2506826 RS |
622 | ;; Determine direction of drag |
623 | (cond | |
624 | ((and (not direction) (not (eq min max))) | |
625 | (setq direction (if (< (point) (/ (+ min max) 2)) -1 1))) | |
626 | ((and (not (eq direction -1)) (<= (point) min)) | |
627 | (setq direction -1)) | |
628 | ((and (not (eq direction 1)) (>= (point) max)) | |
629 | (setq direction 1))) | |
8a946354 | 630 | |
f2506826 | 631 | (if (not selection-thing) nil |
8a946354 | 632 | |
f2506826 RS |
633 | ;; If dragging forward, goal is next character |
634 | (if (and (eq direction 1) (not (eobp))) (forward-char 1)) | |
8a946354 | 635 | |
f2506826 | 636 | ;; Move to start/end of selected thing |
67384793 | 637 | (let ((goal (point))) |
f2506826 RS |
638 | (goto-char (if (eq 1 direction) min max)) |
639 | (condition-case nil | |
640 | (progn | |
641 | (while (> (* direction (- goal (point))) 0) | |
f2506826 RS |
642 | (forward-thing selection-thing direction)) |
643 | (let ((end (point))) | |
644 | (forward-thing selection-thing (- direction)) | |
645 | (goto-char | |
646 | (if (> (* direction (- goal (point))) 0) | |
67384793 | 647 | end (point))))) |
f2506826 | 648 | (error)))) |
8a946354 | 649 | |
f2506826 RS |
650 | ;; Move overlay |
651 | (move-overlay overlay | |
652 | (if (eq 1 direction) min (point)) | |
653 | (if (eq -1 direction) max (point)) | |
654 | (current-buffer)) | |
8a946354 | 655 | |
f2506826 RS |
656 | ))) ; end track-mouse |
657 | ||
3f00c08b KS |
658 | ;; Detect follow-link events |
659 | (when (mouse-sel-follow-link-p initial-event event) | |
660 | (throw 'follow-link event)) | |
661 | ||
f2506826 RS |
662 | ;; Finish up after dragging |
663 | (let ((overlay-start (overlay-start overlay)) | |
664 | (overlay-end (overlay-end overlay))) | |
8a946354 | 665 | |
f2506826 RS |
666 | ;; Set selection |
667 | (if (not (eq overlay-start overlay-end)) | |
668 | (mouse-sel-set-selection | |
669 | selection | |
670 | (buffer-substring overlay-start overlay-end))) | |
8a946354 | 671 | |
f2506826 RS |
672 | ;; Handle copy/kill |
673 | (let (this-command) | |
674 | (cond | |
675 | ((eq (event-basic-type last-input-event) 'mouse-2) | |
676 | (copy-region-as-kill overlay-start overlay-end) | |
677 | (read-event) (read-event)) | |
678 | ((and (memq (event-basic-type last-input-event) | |
679 | '(mouse-1 mouse-3)) | |
680 | (memq 'down (event-modifiers last-input-event))) | |
681 | (kill-region overlay-start overlay-end) | |
682 | (move-overlay overlay overlay-start overlay-start) | |
683 | (read-event) (read-event)) | |
684 | ((and (eq (event-basic-type last-input-event) 'mouse-3) | |
685 | (memq 'double (event-modifiers last-input-event))) | |
686 | (kill-region overlay-start overlay-end) | |
687 | (move-overlay overlay overlay-start overlay-start))))) | |
688 | ||
689 | direction) | |
690 | ||
691 | ;; Restore cursor | |
692 | (if (fboundp 'modify-frame-parameters) | |
8a946354 | 693 | (modify-frame-parameters |
f2506826 | 694 | (selected-frame) (list (cons 'cursor-type orig-cursor-type)))) |
8a946354 | 695 | |
f2506826 RS |
696 | )))) |
697 | ||
3f00c08b KS |
698 | (defun mouse-sel-follow-link-p (initial final) |
699 | "Return t if we should follow a link, given INITIAL and FINAL mouse events. | |
700 | See `mouse-1-click-follows-link' for details. Currently, Mouse | |
701 | Sel mode does not support using a `double' value to follow links | |
702 | using double-clicks." | |
703 | (and initial final mouse-1-click-follows-link | |
704 | (eq (car initial) 'down-mouse-1) | |
91a2acb2 | 705 | (mouse-on-link-p (event-start initial)) |
3f00c08b KS |
706 | (= (posn-point (event-start initial)) |
707 | (posn-point (event-end final))) | |
708 | (= (event-click-count initial) 1) | |
709 | (or (not (integerp mouse-1-click-follows-link)) | |
710 | (let ((t0 (posn-timestamp (event-start initial))) | |
711 | (t1 (posn-timestamp (event-end final)))) | |
712 | (and (integerp t0) (integerp t1) | |
713 | (if (> mouse-1-click-follows-link 0) | |
714 | (<= (- t1 t0) mouse-1-click-follows-link) | |
715 | (< (- t0 t1) mouse-1-click-follows-link))))))) | |
716 | ||
f2506826 RS |
717 | ;;=== Paste =============================================================== |
718 | ||
640201f8 | 719 | (defun mouse-insert-selection (event arg) |
f2506826 RS |
720 | "Insert the contents of the PRIMARY selection at mouse click. |
721 | If `mouse-yank-at-point' is non-nil, insert at point instead." | |
640201f8 SM |
722 | (interactive "e\nP") |
723 | (if (eq mouse-sel-default-bindings 'interprogram-cut-paste) | |
724 | (mouse-yank-at-click event arg) | |
725 | (mouse-insert-selection-internal 'PRIMARY event))) | |
f2506826 RS |
726 | |
727 | (defun mouse-insert-secondary (event) | |
728 | "Insert the contents of the SECONDARY selection at mouse click. | |
6b4dd332 | 729 | If `mouse-yank-at-point' is non-nil, insert at point instead." |
1a2b6c52 | 730 | (interactive "e") |
f2506826 RS |
731 | (mouse-insert-selection-internal 'SECONDARY event)) |
732 | ||
733 | (defun mouse-insert-selection-internal (selection event) | |
734 | "Insert the contents of the named SELECTION at mouse click. | |
735 | If `mouse-yank-at-point' is non-nil, insert at point instead." | |
8a946354 | 736 | (unless mouse-yank-at-point |
ad3f1e65 SM |
737 | (mouse-set-point event)) |
738 | (when mouse-sel-get-selection-function | |
739 | (push-mark (point) 'nomsg) | |
d3886822 EZ |
740 | (insert-for-yank |
741 | (or (funcall mouse-sel-get-selection-function selection) "")))) | |
f2506826 | 742 | |
67384793 RS |
743 | ;;=== Handle loss of selections =========================================== |
744 | ||
745 | (defun mouse-sel-lost-selection-hook (selection) | |
746 | "Remove the overlay for a lost selection." | |
7b990caf | 747 | (let ((overlay (mouse-sel-selection-overlay selection))) |
67384793 RS |
748 | (delete-overlay overlay))) |
749 | ||
ad3f1e65 | 750 | (provide 'mouse-sel) |
f2506826 | 751 | |
e8af40ee | 752 | ;;; mouse-sel.el ends here |