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be010748 RS |
1 | ;;; viper-mous.el --- mouse support for Viper |
2 | ||
546fe085 | 3 | ;; Copyright (C) 1994, 1995 Free Software Foundation, Inc. |
d6fd318f | 4 | |
6c2e12f4 KH |
5 | ;; This file is part of GNU Emacs. |
6 | ||
7 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
8 | ;; it under the terms of the GNU General Public License as published by | |
9 | ;; the Free Software Foundation; either version 2, or (at your option) | |
10 | ;; any later version. | |
11 | ||
12 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
13 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | ;; GNU General Public License for more details. | |
16 | ||
17 | ;; You should have received a copy of the GNU General Public License | |
18 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
19 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
20 | ||
21 | ||
22 | (require 'viper-util) | |
23 | ||
24 | \f | |
25 | ;;; Variables | |
26 | ||
27 | ;; Variable used for catching the switch-frame event. | |
28 | ;; If non-nil, indicates that previous-frame should be the selected | |
29 | ;; one. Used by vip-mouse-click-get-word. Not a user option. | |
30 | (defvar vip-frame-of-focus nil) | |
31 | ||
32 | ;; Frame that was selected before the switch-frame event. | |
546fe085 | 33 | (defconst vip-current-frame-saved (selected-frame)) |
6c2e12f4 KH |
34 | |
35 | (defvar vip-surrounding-word-function 'vip-surrounding-word | |
36 | "*Function that determines what constitutes a word for clicking events. | |
37 | Takes two parameters: a COUNT, indicating how many words to return, | |
38 | and CLICK-COUNT, telling whether this is the first click, a double-click, | |
39 | or a tripple-click.") | |
40 | ||
41 | ;; time interval in millisecond within which successive clicks are | |
42 | ;; considered related | |
43 | (defconst vip-multiclick-timeout (if vip-xemacs-p | |
61d0d254 MK |
44 | mouse-track-multi-click-time |
45 | double-click-time) | |
6c2e12f4 KH |
46 | "*Time interval in millisecond within which successive clicks are |
47 | considered related.") | |
48 | ||
49 | ;; current event click count; XEmacs only | |
50 | (defvar vip-current-click-count 0) | |
51 | ;; time stamp of the last click event; XEmacs only | |
52 | (defvar vip-last-click-event-timestamp 0) | |
53 | ||
54 | ;; Local variable used to toggle wraparound search on click. | |
55 | (vip-deflocalvar vip-mouse-click-search-noerror t) | |
56 | ||
57 | ;; Local variable used to delimit search after wraparound. | |
58 | (vip-deflocalvar vip-mouse-click-search-limit nil) | |
59 | ||
60 | ;; remembers prefix argument to pass along to commands invoked by second | |
61 | ;; click. | |
62 | ;; This is needed because in Emacs (not XEmacs), assigning to preix-arg | |
63 | ;; causes Emacs to count the second click as if it was a single click | |
64 | (defvar vip-global-prefix-argument nil) | |
65 | ||
66 | ||
67 | \f | |
68 | ;;; Code | |
69 | ||
546fe085 | 70 | (defsubst vip-multiclick-p () |
6c2e12f4 KH |
71 | (not (vip-sit-for-short vip-multiclick-timeout t))) |
72 | ||
73 | (defun vip-surrounding-word (count click-count) | |
74 | "Returns word surrounding point according to a heuristic. | |
75 | COUNT indicates how many regions to return. | |
61d0d254 MK |
76 | If CLICK-COUNT is 1, `word' is a word in Vi sense. |
77 | If CLICK-COUNT is 2,then `word' is a Word in Vi sense. | |
6c2e12f4 KH |
78 | If the character clicked on is a non-separator and is non-alphanumeric but |
79 | is adjacent to an alphanumeric symbol, then it is considered alphanumeric | |
80 | for the purpose of this command. If this character has a matching | |
81 | character, such as `\(' is a match for `\)', then the matching character is | |
82 | also considered alphanumeric. | |
61d0d254 MK |
83 | For convenience, in Lisp modes, `-' is considered alphanumeric. |
84 | ||
85 | If CLICK-COUNT is 3 or more, returns the line clicked on with leading and | |
86 | trailing space and tabs removed. In that case, the first argument, COUNT, | |
87 | is ignored." | |
a595547c | 88 | (let ((modifiers "") |
c9dd7f74 | 89 | beg skip-flag result |
a595547c | 90 | word-beg) |
c9dd7f74 | 91 | (if (> click-count 2) |
61d0d254 MK |
92 | (save-excursion |
93 | (beginning-of-line) | |
a595547c | 94 | (vip-skip-all-separators-forward 'within-line) |
61d0d254 MK |
95 | (setq beg (point)) |
96 | (end-of-line) | |
c9dd7f74 | 97 | (setq result (buffer-substring beg (point)))) |
61d0d254 | 98 | |
a595547c | 99 | (if (and (not (vip-looking-at-alphasep)) |
61d0d254 | 100 | (or (save-excursion (vip-backward-char-carefully) |
a595547c | 101 | (vip-looking-at-alpha)) |
61d0d254 | 102 | (save-excursion (vip-forward-char-carefully) |
a595547c MK |
103 | (vip-looking-at-alpha)))) |
104 | (setq modifiers | |
61d0d254 | 105 | (cond ((looking-at "\\\\") "\\\\") |
a595547c | 106 | ((looking-at "-") "C-C-") |
61d0d254 MK |
107 | ((looking-at "[][]") "][") |
108 | ((looking-at "[()]") ")(") | |
109 | ((looking-at "[{}]") "{}") | |
110 | ((looking-at "[<>]") "<>") | |
111 | ((looking-at "[`']") "`'") | |
a595547c MK |
112 | ((looking-at "\\^") "\\^") |
113 | ((vip-looking-at-separator) "") | |
61d0d254 | 114 | (t (char-to-string (following-char)))) |
a595547c | 115 | )) |
61d0d254 | 116 | |
a595547c | 117 | ;; Add `-' to alphanum, if it wasn't added and if we are in Lisp |
61d0d254 MK |
118 | (or (looking-at "-") |
119 | (not (string-match "lisp" (symbol-name major-mode))) | |
a595547c | 120 | (setq modifiers (concat modifiers "C-C-"))) |
61d0d254 | 121 | |
61d0d254 MK |
122 | |
123 | (save-excursion | |
a595547c MK |
124 | (cond ((> click-count 1) (vip-skip-nonseparators 'backward)) |
125 | ((vip-looking-at-alpha modifiers) | |
126 | (vip-skip-alpha-backward modifiers)) | |
127 | ((not (vip-looking-at-alphasep modifiers)) | |
128 | (vip-skip-nonalphasep-backward)) | |
129 | (t (if (> click-count 1) | |
130 | (vip-skip-nonseparators 'backward) | |
131 | (vip-skip-alpha-backward modifiers)))) | |
132 | ||
61d0d254 MK |
133 | (setq word-beg (point)) |
134 | ||
a595547c | 135 | (setq skip-flag nil) ; don't move 1 char forw the first time |
61d0d254 | 136 | (while (> count 0) |
a595547c MK |
137 | (if skip-flag (vip-forward-char-carefully 1)) |
138 | (setq skip-flag t) ; now always move 1 char forward | |
139 | (if (> click-count 1) | |
140 | (vip-skip-nonseparators 'forward) | |
141 | (vip-skip-alpha-forward modifiers)) | |
61d0d254 | 142 | (setq count (1- count))) |
a595547c | 143 | |
c9dd7f74 MK |
144 | (setq result (buffer-substring word-beg (point)))) |
145 | ) ; if | |
a595547c | 146 | ;; XEmacs doesn't have set-text-properties, but there buffer-substring |
c9dd7f74 MK |
147 | ;; doesn't return properties together with the string, so it's not needed. |
148 | (if vip-emacs-p | |
149 | (set-text-properties 0 (length result) nil result)) | |
150 | result | |
151 | )) | |
6c2e12f4 KH |
152 | |
153 | ||
61d0d254 | 154 | (defun vip-mouse-click-get-word (click count click-count) |
6c2e12f4 | 155 | "Returns word surrounding the position of a mouse click. |
61d0d254 MK |
156 | Click may be in another window. Current window and buffer isn't changed. |
157 | On single or double click, returns the word as determined by | |
158 | `vip-surrounding-word-function'." | |
6c2e12f4 KH |
159 | |
160 | (let ((click-word "") | |
161 | (click-pos (vip-mouse-click-posn click)) | |
162 | (click-buf (vip-mouse-click-window-buffer click))) | |
163 | (or (numberp count) (setq count 1)) | |
164 | (or (numberp click-count) (setq click-count 1)) | |
165 | ||
166 | (save-excursion | |
167 | (save-window-excursion | |
168 | (if click-pos | |
169 | (progn | |
170 | (set-buffer click-buf) | |
171 | ||
172 | (goto-char click-pos) | |
173 | (setq click-word | |
174 | (funcall vip-surrounding-word-function count click-count))) | |
175 | (error "Click must be over a window.")) | |
176 | click-word)))) | |
177 | ||
546fe085 KH |
178 | ;; Returns window where click occurs |
179 | (defsubst vip-mouse-click-frame (click) | |
180 | (window-frame (vip-mouse-click-window click))) | |
6c2e12f4 | 181 | |
546fe085 KH |
182 | ;; Returns window where click occurs |
183 | (defsubst vip-mouse-click-window (click) | |
6c2e12f4 KH |
184 | (if vip-xemacs-p |
185 | (event-window click) | |
186 | (posn-window (event-start click)))) | |
187 | ||
546fe085 KH |
188 | ;; Returns the buffer of the window where click occurs |
189 | (defsubst vip-mouse-click-window-buffer (click) | |
6c2e12f4 KH |
190 | (window-buffer (vip-mouse-click-window click))) |
191 | ||
546fe085 KH |
192 | ;; Returns the name of the buffer in the window where click occurs |
193 | (defsubst vip-mouse-click-window-buffer-name (click) | |
6c2e12f4 KH |
194 | (buffer-name (vip-mouse-click-window-buffer click))) |
195 | ||
546fe085 KH |
196 | ;; Returns position of a click |
197 | (defsubst vip-mouse-click-posn (click) | |
6c2e12f4 KH |
198 | (if vip-xemacs-p |
199 | (event-point click) | |
200 | (posn-point (event-start click)))) | |
201 | ||
202 | (defun vip-mouse-click-insert-word (click arg) | |
203 | "Insert word clicked or double-clicked on. | |
204 | With prefix argument, N, insert that many words. | |
205 | This command must be bound to a mouse click. | |
206 | The double-click action of the same mouse button must not be bound | |
207 | \(or it must be bound to the same function\). | |
208 | See `vip-surrounding-word' for the definition of a word in this case." | |
209 | (interactive "e\nP") | |
210 | (if vip-frame-of-focus ;; to handle clicks in another frame | |
546fe085 | 211 | (select-frame vip-frame-of-focus)) |
6c2e12f4 KH |
212 | |
213 | ;; turn arg into a number | |
214 | (cond ((numberp arg) nil) | |
215 | ;; prefix arg is a list when one hits C-u then command | |
216 | ((and (listp arg) (numberp (car arg))) | |
217 | (setq arg (car arg))) | |
218 | (t (setq arg 1))) | |
219 | ||
220 | (let (click-count interrupting-event) | |
221 | (if (and | |
222 | (vip-multiclick-p) | |
223 | ;; This trick checks if there is a pending mouse event | |
224 | ;; if so, we use this latter event and discard the current mouse click | |
225 | ;; If the next panding event is not a mouse event, we execute | |
226 | ;; the current mouse event | |
227 | (progn | |
228 | (setq interrupting-event (vip-read-event)) | |
229 | (vip-mouse-event-p last-input-event))) | |
230 | (progn ;; interrupted wait | |
231 | (setq vip-global-prefix-argument arg) | |
232 | ;; count this click for XEmacs | |
233 | (vip-event-click-count click)) | |
234 | ;; uninterrupted wait or the interrupting event wasn't a mouse event | |
235 | (setq click-count (vip-event-click-count click)) | |
236 | (if (> click-count 1) | |
237 | (setq arg vip-global-prefix-argument | |
238 | vip-global-prefix-argument nil)) | |
239 | (insert (vip-mouse-click-get-word click arg click-count)) | |
240 | (if (and interrupting-event | |
241 | (eventp interrupting-event) | |
242 | (not (vip-mouse-event-p interrupting-event))) | |
243 | (vip-set-unread-command-events interrupting-event)) | |
244 | ))) | |
245 | ||
246 | ;; arg is an event. accepts symbols and numbers, too | |
247 | (defun vip-mouse-event-p (event) | |
248 | (if (eventp event) | |
249 | (string-match "\\(mouse-\\|frame\\|screen\\|track\\)" | |
250 | (prin1-to-string (vip-event-key event))))) | |
251 | ||
252 | ;; XEmacs has no double-click events. So, we must simulate. | |
253 | ;; So, we have to simulate event-click-count. | |
254 | (defun vip-event-click-count (click) | |
255 | (if vip-xemacs-p | |
256 | (progn | |
257 | ;; if more than 1 second | |
258 | (if (> (- (event-timestamp click) vip-last-click-event-timestamp) | |
259 | vip-multiclick-timeout) | |
260 | (setq vip-current-click-count 0)) | |
261 | (setq vip-last-click-event-timestamp (event-timestamp click) | |
262 | vip-current-click-count (1+ vip-current-click-count))) | |
263 | (event-click-count click))) | |
264 | ||
265 | ||
266 | ||
267 | (defun vip-mouse-click-search-word (click arg) | |
268 | "Find the word clicked or double-clicked on. Word may be in another window. | |
269 | With prefix argument, N, search for N-th occurrence. | |
270 | This command must be bound to a mouse click. The double-click action of the | |
271 | same button must not be bound \(or it must be bound to the same function\). | |
272 | See `vip-surrounding-word' for the details on what constitutes a word for | |
273 | this command." | |
274 | (interactive "e\nP") | |
275 | (if vip-frame-of-focus ;; to handle clicks in another frame | |
546fe085 | 276 | (select-frame vip-frame-of-focus)) |
6c2e12f4 KH |
277 | (let (click-word click-count |
278 | (previous-search-string vip-s-string)) | |
279 | ||
280 | (if (and | |
281 | (vip-multiclick-p) | |
282 | ;; This trick checks if there is a pending mouse event | |
283 | ;; if so, we use this latter event and discard the current mouse click | |
61d0d254 | 284 | ;; If the next pending event is not a mouse event, we execute |
6c2e12f4 KH |
285 | ;; the current mouse event |
286 | (progn | |
287 | (vip-read-event) | |
288 | (vip-mouse-event-p last-input-event))) | |
289 | (progn ;; interrupted wait | |
61d0d254 MK |
290 | (setq vip-global-prefix-argument |
291 | (or vip-global-prefix-argument arg)) | |
6c2e12f4 KH |
292 | ;; remember command that was before the multiclick |
293 | (setq this-command last-command) | |
294 | ;; make sure we counted this event---needed for XEmacs only | |
295 | (vip-event-click-count click)) | |
296 | ;; uninterrupted wait | |
297 | (setq click-count (vip-event-click-count click)) | |
298 | (setq click-word (vip-mouse-click-get-word click nil click-count)) | |
299 | ||
300 | (if (> click-count 1) | |
301 | (setq arg vip-global-prefix-argument | |
302 | vip-global-prefix-argument nil)) | |
303 | (setq arg (or arg 1)) | |
304 | ||
305 | (vip-deactivate-mark) | |
306 | (if (or (not (string= click-word vip-s-string)) | |
307 | (not (markerp vip-search-start-marker)) | |
308 | (not (equal (marker-buffer vip-search-start-marker) | |
309 | (current-buffer))) | |
310 | (not (eq last-command 'vip-mouse-click-search-word))) | |
311 | (progn | |
312 | (setq vip-search-start-marker (point-marker) | |
313 | vip-local-search-start-marker vip-search-start-marker | |
314 | vip-mouse-click-search-noerror t | |
315 | vip-mouse-click-search-limit nil) | |
316 | ||
317 | ;; make search string known to Viper | |
318 | (setq vip-s-string (if vip-re-search | |
319 | (regexp-quote click-word) | |
320 | click-word)) | |
321 | (if (not (string= vip-s-string (car vip-search-history))) | |
322 | (setq vip-search-history | |
323 | (cons vip-s-string vip-search-history))) | |
324 | )) | |
325 | ||
326 | (push-mark nil t) | |
327 | (while (> arg 0) | |
328 | (vip-forward-word 1) | |
329 | (condition-case nil | |
330 | (progn | |
331 | (if (not (search-forward click-word vip-mouse-click-search-limit | |
332 | vip-mouse-click-search-noerror)) | |
333 | (progn | |
334 | (setq vip-mouse-click-search-noerror nil) | |
335 | (setq vip-mouse-click-search-limit | |
336 | (save-excursion | |
337 | (if (and | |
338 | (markerp vip-local-search-start-marker) | |
339 | (marker-buffer vip-local-search-start-marker)) | |
340 | (goto-char vip-local-search-start-marker)) | |
341 | (vip-line-pos 'end))) | |
342 | ||
343 | (goto-char (point-min)) | |
344 | (search-forward click-word | |
345 | vip-mouse-click-search-limit nil))) | |
346 | (goto-char (match-beginning 0)) | |
347 | (message "Searching for: %s" vip-s-string) | |
348 | (if (<= arg 1) | |
349 | (vip-flash-search-pattern)) | |
350 | ) | |
351 | (error (beep 1) | |
352 | (if (or (not (string= click-word previous-search-string)) | |
353 | (not (eq last-command 'vip-mouse-click-search-word))) | |
354 | (message "`%s': String not found in %s" | |
355 | vip-s-string (buffer-name (current-buffer))) | |
356 | (message | |
357 | "`%s': Last occurrence in %s. Back to beginning of search" | |
358 | click-word (buffer-name (current-buffer))) | |
359 | (setq arg 1) ;; to terminate the loop | |
360 | (sit-for 2)) | |
361 | (setq vip-mouse-click-search-noerror t) | |
362 | (setq vip-mouse-click-search-limit nil) | |
363 | (if (and (markerp vip-local-search-start-marker) | |
364 | (marker-buffer vip-local-search-start-marker)) | |
365 | (goto-char vip-local-search-start-marker)))) | |
366 | (setq arg (1- arg))) | |
367 | ))) | |
368 | ||
369 | (defun vip-mouse-catch-frame-switch (event arg) | |
370 | "Catch the event of switching frame. | |
371 | Usually is bound to a 'down-mouse' event to work properly. See sample | |
372 | bindings in viper.el and in the Viper manual." | |
373 | (interactive "e\nP") | |
374 | (setq vip-frame-of-focus nil) | |
375 | ;; pass prefix arg along to vip-mouse-click-search/insert-word | |
376 | (setq prefix-arg arg) | |
377 | (if (eq last-command 'handle-switch-frame) | |
546fe085 | 378 | (setq vip-frame-of-focus vip-current-frame-saved)) |
6c2e12f4 KH |
379 | ;; make Emacs forget that it executed vip-mouse-catch-frame-switch |
380 | (setq this-command last-command)) | |
381 | ||
382 | ;; Called just before switching frames. Saves the old selected frame. | |
383 | ;; Sets last-command to handle-switch-frame (this is done automatically in | |
384 | ;; Emacs. | |
385 | ;; The semantics of switching frames is different in Emacs and XEmacs. | |
386 | ;; In Emacs, if you select-frame A while mouse is over frame B and then | |
387 | ;; start typing, input goes to frame B, which becomes selected. | |
388 | ;; In XEmacs, input will go to frame A. This may be a bug in one of the | |
389 | ;; Emacsen, but also may be a design decision. | |
390 | ;; Also, in Emacs sending input to frame B generates handle-switch-frame | |
391 | ;; event, while in XEmacs it doesn't. | |
392 | ;; All this accounts for the difference in the behavior of | |
393 | ;; vip-mouse-click-* commands when you click in a frame other than the one | |
394 | ;; that was the last to receive input. In Emacs, focus will be in frame A | |
395 | ;; until you do something other than vip-mouse-click-* command. | |
396 | ;; In XEmacs, you have to manually select frame B (with the mouse click) in | |
397 | ;; order to shift focus to frame B. | |
546fe085 KH |
398 | (defsubst vip-remember-current-frame (frame) |
399 | (setq last-command 'handle-switch-frame | |
400 | vip-current-frame-saved (selected-frame))) | |
6c2e12f4 KH |
401 | |
402 | ||
546fe085 | 403 | (cond ((vip-window-display-p) |
a595547c MK |
404 | (let* ((search-key (if vip-xemacs-p |
405 | [(meta shift button1up)] [S-mouse-1])) | |
6c2e12f4 | 406 | (search-key-catch (if vip-xemacs-p |
a595547c MK |
407 | [(meta shift button1)] [S-down-mouse-1])) |
408 | (insert-key (if vip-xemacs-p | |
409 | [(meta shift button2up)] [S-mouse-2])) | |
6c2e12f4 | 410 | (insert-key-catch (if vip-xemacs-p |
a595547c | 411 | [(meta shift button2)] [S-down-mouse-2])) |
6c2e12f4 KH |
412 | (search-key-unbound (and (not (key-binding search-key)) |
413 | (not (key-binding search-key-catch)))) | |
414 | (insert-key-unbound (and (not (key-binding insert-key)) | |
415 | (not (key-binding insert-key-catch)))) | |
416 | ) | |
417 | ||
418 | (if search-key-unbound | |
419 | (global-set-key search-key 'vip-mouse-click-search-word)) | |
420 | (if insert-key-unbound | |
421 | (global-set-key insert-key 'vip-mouse-click-insert-word)) | |
422 | ||
423 | ;; The following would be needed if you want to use the above two | |
424 | ;; while clicking in another frame. If you only want to use them | |
425 | ;; by clicking in another window, not frame, the bindings below | |
426 | ;; aren't necessary. | |
427 | ||
428 | ;; These must be bound to mouse-down event for the same mouse | |
429 | ;; buttons as 'vip-mouse-click-search-word and | |
430 | ;; 'vip-mouse-click-insert-word | |
431 | (if search-key-unbound | |
432 | (global-set-key search-key-catch 'vip-mouse-catch-frame-switch)) | |
433 | (if insert-key-unbound | |
434 | (global-set-key insert-key-catch 'vip-mouse-catch-frame-switch)) | |
435 | ||
436 | (if vip-xemacs-p | |
546fe085 KH |
437 | (add-hook 'mouse-leave-frame-hook |
438 | 'vip-remember-current-frame) | |
6c2e12f4 KH |
439 | (defadvice handle-switch-frame (before vip-frame-advice activate) |
440 | "Remember the selected frame before the switch-frame event." | |
546fe085 | 441 | (vip-remember-current-frame (selected-frame)))) |
6c2e12f4 KH |
442 | ))) |
443 | ||
444 | ||
445 | ||
446 | (provide 'viper-mous) | |
447 | ||
448 | ;;; viper-mous.el ends here |