|
282
|
1 ;;; dragdrop.el --- window system-independent Drag'n'Drop support.
|
|
|
2
|
|
|
3 ;; Copyright (C) 1998 Oliver Graf <ograf@fga.de>
|
|
|
4
|
|
|
5 ;; Maintainer: XEmacs Development Team, Oliver Graf <ograf@fga.de>
|
|
|
6 ;; Keywords: drag, drop, dumped
|
|
|
7
|
|
|
8 ;; This file is part of XEmacs.
|
|
|
9
|
|
|
10 ;; XEmacs is free software; you can redistribute it and/or modify it
|
|
|
11 ;; 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 ;; XEmacs is distributed in the hope that it will be useful, but
|
|
|
16 ;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
18 ;; General Public License for more details.
|
|
|
19
|
|
|
20 ;; You should have received a copy of the GNU General Public License
|
|
|
21 ;; along with XEmacs; see the file COPYING. If not, write to the
|
|
|
22 ;; Free Software Foundation, 59 Temple Place - Suite 330,
|
|
|
23 ;; Boston, MA 02111-1307, USA.
|
|
|
24
|
|
|
25 ;;; Synched up with: Not in FSF.
|
|
|
26
|
|
|
27 ;;; Commentary:
|
|
|
28
|
|
284
|
29 ;; This file is dumped with XEmacs (when drag'n'drop support is compiled in).
|
|
282
|
30
|
|
|
31 ;;; Code:
|
|
|
32
|
|
|
33 ;; we need mouse-set-point
|
|
|
34 (require 'mouse)
|
|
284
|
35 (provide 'dragdrop)
|
|
282
|
36
|
|
|
37 ;; I think this is a better name for the custom group
|
|
|
38 ;; looks better in the menu and the group display as dragdrop
|
|
284
|
39 ;; Anyway: is dragdrop- a good prefix for all this?
|
|
288
|
40 ;; What if someone trys drop<TAB> in the minibuffer?
|
|
282
|
41 (defgroup drag-n-drop nil
|
|
290
|
42 "*{EXPERIMENTAL} Window system-independent drag'n'drop support."
|
|
282
|
43 :group 'editing)
|
|
|
44
|
|
|
45 (defcustom dragdrop-drop-at-point nil
|
|
290
|
46 "*{EXPERIMENTAL} If non-nil, drop text at the cursor location.
|
|
282
|
47 Otherwise, the cursor will be moved to the location of the pointer drop before
|
|
|
48 text is inserted."
|
|
|
49 :type 'boolean
|
|
|
50 :group 'drag-n-drop)
|
|
|
51
|
|
|
52 (defcustom dragdrop-autoload-tm-view nil
|
|
290
|
53 "*{EXPERIMENTAL} If non-nil, autoload tm-view to decode MIME data.
|
|
380
|
54 Otherwise, the buffer is only decoded if tm-view is already available."
|
|
282
|
55 :type 'boolean
|
|
|
56 :group 'drag-n-drop)
|
|
|
57
|
|
284
|
58 ;; the widget for editing the drop-functions
|
|
|
59 (define-widget 'dragdrop-function-widget 'list
|
|
290
|
60 "*{EXPERIMENTAL} Widget for editing drop dispatch functions."
|
|
284
|
61 :args `((choice :tag "Function"
|
|
290
|
62 (function-item experimental-dragdrop-drop-url-default)
|
|
|
63 (function-item experimental-dragdrop-drop-mime-default)
|
|
|
64 (function-item experimental-dragdrop-drop-log-function)
|
|
284
|
65 (function :tag "Other" nil))
|
|
|
66 (choice :tag "Button" :value t
|
|
|
67 (choice-item :tag "Ignore" t)
|
|
|
68 (choice-item 0) (choice-item 1) (choice-item 2)
|
|
|
69 (choice-item 3) (choice-item 4) (choice-item 5)
|
|
|
70 (choice-item 6) (choice-item 7))
|
|
|
71 (radio-button-choice :tag "Modifiers"
|
|
|
72 (const :tag "Ignore Modifier Keys" t)
|
|
|
73 (checklist :greedy t
|
|
|
74 :format "Modifier Keys:\n%v"
|
|
|
75 :extra-offset 6
|
|
|
76 (const shift)
|
|
|
77 (const control)
|
|
|
78 (const meta)
|
|
|
79 (const alt)
|
|
|
80 (const hyper)
|
|
|
81 (const super)))
|
|
|
82 (repeat :inline t :value nil :tag "Extra Function Arguments"
|
|
|
83 (sexp :tag "Arg" :value nil)))
|
|
|
84 :value '(nil t t))
|
|
|
85
|
|
290
|
86 (defcustom experimental-dragdrop-drop-functions '((experimental-dragdrop-drop-url-default t t)
|
|
|
87 (experimental-dragdrop-drop-mime-default t t))
|
|
|
88 "*{EXPERIMENTAL} This is the standart drop function search list.
|
|
284
|
89 Each element is a list of a function, a button selector, a modifier
|
|
|
90 selector and optional argumets to the function call.
|
|
|
91 The function must accept at least two arguments: first is the event
|
|
|
92 of the drop, second the object data, followed by any of the optional
|
|
|
93 arguments provided in this list.
|
|
|
94 The functions are called in order, until one returns t."
|
|
282
|
95 :group 'drag-n-drop
|
|
284
|
96 :type '(repeat dragdrop-function-widget))
|
|
|
97
|
|
|
98 (defgroup dnd-debug nil
|
|
290
|
99 "*{EXPERIMENTAL} Drag'n'Drop debugging options."
|
|
284
|
100 :group 'drag-n-drop)
|
|
|
101
|
|
|
102 (defcustom dragdrop-drop-log nil
|
|
290
|
103 "*{EXPERIMENTAL} If non-nil, every drop is logged.
|
|
284
|
104 The name of the buffer is set in the custom 'dragdrop-drop-log-name"
|
|
|
105 :group 'dnd-debug
|
|
|
106 :type 'boolean)
|
|
|
107
|
|
|
108 (defcustom dragdrop-drop-log-name "*drop log buffer*"
|
|
290
|
109 "*{EXPERIMENTAL} The name of the buffer used to log drops.
|
|
284
|
110 Set dragdrop-drop-log to non-nil to enable this feature."
|
|
|
111 :group 'dnd-debug
|
|
|
112 :type 'string)
|
|
|
113
|
|
|
114 (defvar dragdrop-drop-log-buffer nil
|
|
290
|
115 "*{EXPERIMENTAL} Buffer to log drops in debug mode.")
|
|
282
|
116
|
|
288
|
117 ;;
|
|
|
118 ;; Drop API
|
|
|
119 ;;
|
|
282
|
120 (defun dragdrop-drop-dispatch (object)
|
|
290
|
121 "*{EXPERIMENTAL} This function identifies DROP type misc-user-events.
|
|
284
|
122 It calls functions which will handle the drag."
|
|
|
123 (let ((event current-mouse-event))
|
|
|
124 (and dragdrop-drop-log
|
|
290
|
125 (experimental-dragdrop-drop-log-function event object))
|
|
284
|
126 (dragdrop-drop-find-functions event object)))
|
|
|
127
|
|
|
128 (defun dragdrop-drop-find-functions (event object)
|
|
|
129 "Finds valid drop-handle functions and executes them to dispose the drop.
|
|
290
|
130 It does this by looking for extent-properties called
|
|
|
131 'experimental-dragdrop-drop-functions and for variables named like this."
|
|
282
|
132 (catch 'dragdrop-drop-is-done
|
|
284
|
133 (and (event-over-text-area-p event)
|
|
282
|
134 ;; let's search the extents
|
|
|
135 (catch 'dragdrop-extents-done
|
|
284
|
136 (let ((window (event-window event))
|
|
|
137 (pos (event-point event))
|
|
|
138 (cpos (event-closest-point event))
|
|
282
|
139 (buffer nil))
|
|
|
140 (or window (throw 'dragdrop-extents-done nil))
|
|
|
141 (or pos (setq pos cpos))
|
|
|
142 (select-window window)
|
|
|
143 (setq buffer (window-buffer))
|
|
290
|
144 (let ((ext (extent-at pos buffer 'experimental-dragdrop-drop-functions)))
|
|
282
|
145 (while (not (eq ext nil))
|
|
|
146 (dragdrop-drop-do-functions
|
|
290
|
147 (extent-property ext 'experimental-dragdrop-drop-functions)
|
|
284
|
148 event
|
|
282
|
149 object)
|
|
290
|
150 (setq ext (extent-at pos buffer
|
|
|
151 'experimental-dragdrop-drop-functions
|
|
|
152 ext)))))))
|
|
|
153 ;; now look into the variable experimental-dragdrop-drop-functions
|
|
|
154 (dragdrop-drop-do-functions experimental-dragdrop-drop-functions event object)))
|
|
282
|
155
|
|
284
|
156 (defun dragdrop-compare-mods (first-mods second-mods)
|
|
|
157 "Returns t if both first-mods and second-mods contain the same elements.
|
|
|
158 Order is not important."
|
|
|
159 (let ((moda (copy-sequence first-mods))
|
|
|
160 (modb (copy-sequence second-mods)))
|
|
|
161 (while (and (not (eq moda ()))
|
|
|
162 (not (eq modb ())))
|
|
|
163 (setq modb (delete (car moda) modb))
|
|
|
164 (setq moda (delete (car moda) moda)))
|
|
|
165 (and (eq moda ())
|
|
|
166 (eq modb ()))))
|
|
|
167
|
|
|
168 (defun dragdrop-drop-do-functions (drop-funs event object)
|
|
282
|
169 "Calls all functions in drop-funs with object until one returns t.
|
|
|
170 Returns t if one of drop-funs returns t. Otherwise returns nil."
|
|
284
|
171 (let ((flist nil)
|
|
|
172 (button (event-button event))
|
|
|
173 (mods (event-modifiers event)))
|
|
|
174 (while (not (eq drop-funs ()))
|
|
|
175 (setq flist (car drop-funs))
|
|
|
176 (and (or (eq (cadr flist) t)
|
|
|
177 (= (cadr flist) button))
|
|
|
178 (or (eq (caddr flist) t)
|
|
380
|
179 (dragdrop-compare-mods (caddr flist) mods))
|
|
284
|
180 (apply (car flist) `(,event ,object ,@(cdddr flist)))
|
|
|
181 ;; (funcall (car flist) event object)
|
|
|
182 (throw 'dragdrop-drop-is-done t))
|
|
|
183 (setq drop-funs (cdr drop-funs))))
|
|
282
|
184 nil)
|
|
|
185
|
|
290
|
186 (defun experimental-dragdrop-drop-log-function (event object &optional message buffer)
|
|
|
187 "*{EXPERIMENTAL} Logs any drops into a buffer.
|
|
284
|
188 If buffer is nil, it inserts the data into a buffer called after
|
|
|
189 dragdrop-drop-log-name.
|
|
|
190 If dragdrop-drop-log is non-nil, this is done automatically for each drop.
|
|
|
191 The function always returns nil."
|
|
|
192 (save-excursion
|
|
|
193 (cond ((buffer-live-p buffer)
|
|
|
194 (set-buffer buffer))
|
|
|
195 ((stringp buffer)
|
|
|
196 (set-buffer (get-buffer-create buffer)))
|
|
|
197 ((buffer-live-p dragdrop-drop-log-buffer)
|
|
|
198 (set-buffer dragdrop-drop-log-buffer))
|
|
|
199 (t
|
|
|
200 (setq dragdrop-drop-log-buffer (get-buffer-create dragdrop-drop-log-name))
|
|
|
201 (set-buffer dragdrop-drop-log-buffer)))
|
|
|
202 (insert (format "* %s: %s\n"
|
|
|
203 (current-time-string)
|
|
|
204 (if message message "received a drop")))
|
|
|
205 (insert (format " at %d,%d (%d,%d) with button %d and mods %s\n"
|
|
|
206 (event-x event)
|
|
|
207 (event-y event)
|
|
|
208 (event-x-pixel event)
|
|
|
209 (event-y-pixel event)
|
|
|
210 (event-button event)
|
|
|
211 (event-modifiers event)))
|
|
|
212 (insert (format " data is of type %s (%d %s)\n"
|
|
|
213 (cond ((eq (car object) 'dragdrop-URL) "URL")
|
|
|
214 ((eq (car object) 'dragdrop-MIME) "MIME")
|
|
|
215 (t "UNKNOWN"))
|
|
|
216 (length (cdr object))
|
|
|
217 (if (= (length (cdr object)) 1) "element" "elements")))
|
|
|
218 (let ((i 1)
|
|
|
219 (data (cdr object)))
|
|
|
220 (while (not (eq data ()))
|
|
|
221 (insert (format " Element %d: %S\n"
|
|
|
222 i (car data)))
|
|
|
223 (setq i (1+ i))
|
|
|
224 (setq data (cdr data))))
|
|
|
225 (insert "----------\n"))
|
|
|
226 nil)
|
|
|
227
|
|
290
|
228 (defun experimental-dragdrop-drop-url-default (event object)
|
|
|
229 "*{EXPERIMENTAL} Default handler for dropped URL data.
|
|
282
|
230 Finds files and URLs. Returns nil if object does not contain URL data."
|
|
|
231 (cond ((eq (car object) 'dragdrop-URL)
|
|
|
232 (let ((data (cdr object))
|
|
284
|
233 (frame (event-channel event))
|
|
288
|
234 (x pop-up-windows)
|
|
|
235 (window (event-window event)))
|
|
282
|
236 (setq pop-up-windows nil)
|
|
|
237 (while (not (eq data ()))
|
|
|
238 (cond ((dragdrop-is-some-url "file" (car data))
|
|
|
239 ;; if it is some file, pop it to a buffer
|
|
288
|
240 (cond (window
|
|
|
241 (select-window window)))
|
|
|
242 (switch-to-buffer (find-file-noselect
|
|
|
243 (substring (car data) 5))))
|
|
282
|
244 ;; to-do: open ftp URLs with efs...
|
|
|
245 (t
|
|
|
246 ;; some other URL, try to fire up some browser for it
|
|
|
247 (if (boundp 'browse-url-browser-function)
|
|
|
248 (funcall browse-url-browser-function (car data))
|
|
|
249 (display-message 'error
|
|
|
250 "Can't show URL, no browser selected"))))
|
|
|
251 (undo-boundary)
|
|
|
252 (setq data (cdr data)))
|
|
|
253 (make-frame-visible frame)
|
|
|
254 (setq pop-up-windows x)
|
|
|
255 t))
|
|
|
256 (t nil)))
|
|
|
257
|
|
290
|
258 (defun experimental-dragdrop-drop-mime-default (event object)
|
|
|
259 "*{EXPERIMENTAL} Default handler for dropped MIME data.
|
|
282
|
260 Inserts text into buffer, creates MIME buffers for other types.
|
|
|
261 Returns nil if object does not contain MIME data."
|
|
|
262 (cond ((eq (car object) 'dragdrop-MIME)
|
|
|
263 (let ((ldata (cdr object))
|
|
284
|
264 (frame (event-channel event))
|
|
282
|
265 (x pop-up-windows)
|
|
|
266 (data nil))
|
|
|
267 ;; how should this be handled???
|
|
|
268 ;; insert drops of text/* into buffer
|
|
|
269 ;; create new buffer if pointer is outside buffer...
|
|
|
270 ;; but there are many other ways...
|
|
|
271 ;;
|
|
|
272 ;; first thing: check if it's only text/plain and if the
|
|
|
273 ;; drop happened inside some buffer. if yes insert it into
|
|
|
274 ;; this buffer (hope it is not encoded in some MIME way)
|
|
|
275 ;;
|
|
|
276 ;; Remember: ("text/plain" "dosnotmatter" "somedata")
|
|
|
277 ;; drops are inserted at mouse-point, if inside a buffer
|
|
|
278 (while (not (eq ldata ()))
|
|
|
279 (setq data (car ldata))
|
|
|
280 (if (and (listp data)
|
|
|
281 (= (length data) 3)
|
|
284
|
282 (listp (car data))
|
|
|
283 (stringp (caar data))
|
|
|
284 (string= (caar data) "text/plain")
|
|
|
285 (event-over-text-area-p event))
|
|
|
286 (let ((window (event-window event)))
|
|
282
|
287 (and window
|
|
|
288 (select-window window))
|
|
|
289 (and (not dragdrop-drop-at-point)
|
|
284
|
290 (mouse-set-point event))
|
|
282
|
291 (insert (caddr data)))
|
|
|
292 (let ((buf (get-buffer-create "*MIME-Drop data*")))
|
|
|
293 (set-buffer buf)
|
|
|
294 (pop-to-buffer buf nil frame)
|
|
|
295 (or (featurep 'tm-view)
|
|
|
296 (and dragdrop-autoload-tm-view
|
|
|
297 (require 'tm-view)))
|
|
|
298 (cond ((stringp data)
|
|
|
299 ;; this is some raw MIME stuff
|
|
|
300 ;; create some buffer and let tm do the job
|
|
|
301 ;;
|
|
|
302 ;; this is always the same buffer!!!
|
|
|
303 ;; change?
|
|
|
304 (erase-buffer)
|
|
|
305 (insert data)
|
|
|
306 (and (featurep 'tm-view)
|
|
|
307 (mime/viewer-mode buf)))
|
|
|
308 ((and (listp data)
|
|
|
309 (= (length data) 3))
|
|
|
310 ;; change the internal content-type representation to the
|
|
|
311 ;; way tm does it ("content/type" (key . value)*)
|
|
|
312 ;; but for now list will do the job
|
|
|
313 ;;
|
|
|
314 ;; this is always the same buffer!!!
|
|
|
315 ;; change?
|
|
|
316 (erase-buffer)
|
|
|
317 (insert (caddr data))
|
|
|
318 (and (featurep 'tm-view)
|
|
|
319 ;; this list of (car data) should be done before
|
|
|
320 ;; enqueing the event
|
|
284
|
321 (mime/viewer-mode buf (car data) (cadr data))))
|
|
282
|
322 (t
|
|
|
323 (display-message 'error "Wrong drop data")))))
|
|
|
324 (undo-boundary)
|
|
|
325 (setq ldata (cdr ldata)))
|
|
|
326 (make-frame-visible frame)
|
|
|
327 (setq pop-up-windows x))
|
|
|
328 t)
|
|
|
329 (t nil)))
|
|
|
330
|
|
|
331 (defun dragdrop-is-some-url (method url)
|
|
|
332 "Returns true if method equals the start of url.
|
|
|
333 If method does not end into ':' this is appended before the
|
|
|
334 compare."
|
|
|
335 (cond ((and (stringp url)
|
|
|
336 (stringp method)
|
|
|
337 (> (length url) (length method)))
|
|
|
338 ;; is this ?: check efficient enough?
|
|
|
339 (if (not (string= (substring method -1) ":"))
|
|
|
340 (setq method (concat method ":")))
|
|
|
341 (string= method (substring url 0 (length method))))
|
|
|
342 (t nil)))
|
|
|
343
|
|
288
|
344 ;;
|
|
|
345 ;; Drag API
|
|
|
346 ;;
|
|
290
|
347 (defun experimental-dragdrop-drag (event object)
|
|
|
348 "*{EXPERIMENTAL} The generic drag function.
|
|
288
|
349 Tries to do the best with object in the selected protocol.
|
|
|
350 Object must comply to the standart drag'n'drop object
|
|
|
351 format."
|
|
|
352 (error "Not implemented"))
|
|
|
353
|
|
290
|
354 (defun experimental-dragdrop-drag-region (event begin end)
|
|
|
355 "*{EXPERIMENTAL} Drag a region.
|
|
288
|
356 This function uses special data types if the low-level
|
|
|
357 protocol requires it. It does so by calling
|
|
|
358 dragdrop-drag-pure-text."
|
|
380
|
359 (experimental-dragdrop-drag-pure-text event
|
|
288
|
360 (buffer-substring-no-properties begin end)))
|
|
|
361
|
|
290
|
362 (defun experimental-dragdrop-drag-pure-text (event text)
|
|
|
363 "*{EXPERIMENTAL} Drag text-only data.
|
|
288
|
364 Takes care of special low-level protocol data types.
|
|
|
365 Text must be a list of strings."
|
|
|
366 (error "Not implemented"))
|
|
|
367
|
|
290
|
368 (defun experimental-dragdrop-drag-pure-file (event file)
|
|
|
369 "*{EXPERIMENTAL} Drag filepath-only data.
|
|
288
|
370 Takes care of special low-level protocol data types.
|
|
|
371 file must be a list of strings."
|
|
|
372 (error "Not implemented"))
|
|
|
373
|
|
|
374 ;;
|
|
|
375 ;; The following ones come from frame.el but the better belong here
|
|
|
376 ;; until changed
|
|
|
377 ;;
|
|
|
378 (defun cde-start-drag (event type data)
|
|
|
379 "Implement the CDE drag operation.
|
|
|
380 Calls the internal function cde-start-drag-internal to do the actual work."
|
|
|
381 (interactive "_eXX")
|
|
|
382 (if (featurep 'cde)
|
|
|
383 ;; Avoid build-time doc string warning by calling the function
|
|
|
384 ;; in the following roundabout way:
|
|
|
385 (funcall (intern "cde-start-drag-internal")
|
|
|
386 event type data)
|
|
|
387 (error "CDE functionality not compiled in.")))
|
|
|
388
|
|
|
389 (defun cde-start-drag-region (event begin end)
|
|
|
390 "Implement the CDE drag operation for a region.
|
|
|
391 Calls the internal function CDE-start-drag-internal to do the actual work.
|
|
|
392 This always does buffer transfers."
|
|
|
393 ;; Oliver Graf <ograf@fga.de>
|
|
|
394 (interactive "_er")
|
|
|
395 (if (featurep 'cde)
|
|
|
396 (funcall (intern "cde-start-drag-internal")
|
|
|
397 event nil (list (buffer-substring-no-properties begin end)))
|
|
|
398 (error "CDE functionality not compiled in.")))
|
|
|
399
|
|
|
400 ;; the OffiX drag stuff will soon move also (perhaps mouse.el)
|
|
|
401 ;; if the drag event is done
|
|
|
402 (defun offix-start-drag (event data &optional type)
|
|
|
403 "Implement the OffiX drag operation.
|
|
|
404 Calls the internal function offix-start-drag-internal to do the actual work.
|
|
|
405 If type is not given, DndText is assumed."
|
|
|
406 ;; Oliver Graf <ograf@fga.de>
|
|
|
407 (interactive "esi")
|
|
|
408 (if (featurep 'offix)
|
|
|
409 (funcall (intern "offix-start-drag-internal") event data type)
|
|
|
410 (error "OffiX functionality not compiled in.")))
|
|
|
411
|
|
|
412 (defun offix-start-drag-region (event begin end)
|
|
|
413 "Implement the OffiX drag operation for a region.
|
|
|
414 Calls the internal function offix-start-drag-internal to do the actual work.
|
|
|
415 This always assumes DndText as type."
|
|
|
416 ;; Oliver Graf <ograf@fga.de>
|
|
|
417 (interactive "_er")
|
|
|
418 (if (featurep 'offix)
|
|
|
419 (funcall (intern "offix-start-drag-internal")
|
|
|
420 event (buffer-substring-no-properties begin end))
|
|
|
421 (error "OffiX functionality not compiled in.")))
|
|
|
422
|
|
|
423
|
|
282
|
424 ;;; dragdrop.el ends here
|
