1 ;;; x-dnd.el --- drag and drop support for X.
3 ;; Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc.
5 ;; Author: Jan Dj\e,Ad\e(Brv <jan.h.d@swipnet.se>
7 ;; Keywords: window, drag, drop
9 ;; This file is part of GNU Emacs.
11 ;; GNU Emacs is free software; you can redistribute it and/or modify
12 ;; it under the terms of the GNU General Public License as published by
13 ;; the Free Software Foundation; either version 2, or (at your option)
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.
21 ;; You should have received a copy of the GNU General Public License
22 ;; along with GNU Emacs; see the file COPYING. If not, write to the
23 ;; Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
24 ;; Boston, MA 02110-1301, USA.
28 ;; This file provides the drop part only. Currently supported protocols
29 ;; are XDND, Motif and the old KDE 1.x protocol.
35 ;;; Customizable variables
36 (defcustom x-dnd-test-function
'x-dnd-default-test-function
37 "The function drag and drop uses to determine if to accept or reject a drop.
38 The function takes three arguments, WINDOW ACTION and TYPES.
39 WINDOW is where the mouse is when the function is called. WINDOW may be a
40 frame if the mouse isn't over a real window (i.e. menu bar, tool bar or
41 scroll bar). ACTION is the suggested action from the drag and drop source,
42 one of the symbols move, copy link or ask. TYPES is a list of available types
45 The function shall return nil to reject the drop or a cons with two values,
46 the wanted action as car and the wanted type as cdr. The wanted action
47 can be copy, move, link, ask or private.
48 The default value for this variable is `x-dnd-default-test-function'."
55 (defcustom x-dnd-types-alist
57 ("text/uri-list" . x-dnd-handle-uri-list
)
58 ("text/x-moz-url" . x-dnd-handle-moz-url
)
59 ("_NETSCAPE_URL" . x-dnd-handle-uri-list
)
60 ("FILE_NAME" . x-dnd-handle-file-name
)
61 ("UTF8_STRING" . x-dnd-insert-utf8-text
)
62 ("text/plain;charset=UTF-8" . x-dnd-insert-utf8-text
)
63 ("text/plain;charset=utf-8" . x-dnd-insert-utf8-text
)
64 ("text/unicode" . x-dnd-insert-utf16-text
)
65 ("text/plain" . dnd-insert-text
)
66 ("COMPOUND_TEXT" . x-dnd-insert-ctext
)
67 ("STRING" . dnd-insert-text
)
68 ("TEXT" . dnd-insert-text
)
70 "Which function to call to handle a drop of that type.
71 If the type for the drop is not present, or the function is nil,
72 the drop is rejected. The function takes three arguments, WINDOW, ACTION
73 and DATA. WINDOW is where the drop occured, ACTION is the action for
74 this drop (copy, move, link, private or ask) as determined by a previous
75 call to `x-dnd-test-function'. DATA is the drop data.
76 The function shall return the action used (copy, move, link or private) if drop
77 is successful, nil if not."
82 (defcustom x-dnd-known-types
88 "text/plain;charset=UTF-8"
89 "text/plain;charset=utf-8"
96 "The types accepted by default for dropped data.
97 The types are chosen in the order they appear in the list."
99 :type
'(repeat string
)
103 ;; Internal variables
105 (defvar x-dnd-current-state nil
106 "The current state for a drop.
107 This is an alist with one entry for each display. The value for each display
108 is a vector that contains the state for drag and drop for that display.
109 Elements in the vector are:
110 Last buffer drag was in,
111 last window drag was in,
112 types available for drop,
113 the action suggested by the source,
114 the type we want for the drop,
115 the action we want for the drop,
116 any protocol specific data.")
118 (defvar x-dnd-empty-state
[nil nil nil nil nil nil nil
])
122 (defun x-dnd-init-frame (&optional frame
)
123 "Setup drag and drop for FRAME (i.e. create appropriate properties)."
124 (x-register-dnd-atom "DndProtocol" frame
)
125 (x-register-dnd-atom "_MOTIF_DRAG_AND_DROP_MESSAGE" frame
)
126 (x-register-dnd-atom "XdndEnter" frame
)
127 (x-register-dnd-atom "XdndPosition" frame
)
128 (x-register-dnd-atom "XdndLeave" frame
)
129 (x-register-dnd-atom "XdndDrop" frame
)
130 (x-dnd-init-xdnd-for-frame frame
)
131 (x-dnd-init-motif-for-frame frame
))
133 (defun x-dnd-get-state-cons-for-frame (frame-or-window)
134 "Return the entry in x-dnd-current-state for a frame or window."
135 (let* ((frame (if (framep frame-or-window
) frame-or-window
136 (window-frame frame-or-window
)))
137 (display (frame-parameter frame
'display
)))
138 (if (not (assoc display x-dnd-current-state
))
139 (push (cons display
(copy-sequence x-dnd-empty-state
))
140 x-dnd-current-state
))
141 (assoc display x-dnd-current-state
)))
143 (defun x-dnd-get-state-for-frame (frame-or-window)
144 "Return the state in x-dnd-current-state for a frame or window."
145 (cdr (x-dnd-get-state-cons-for-frame frame-or-window
)))
147 (defun x-dnd-default-test-function (window action types
)
148 "The default test function for drag and drop.
149 WINDOW is where the mouse is when this function is called. It may be a frame
150 if the mouse is over the menu bar, scroll bar or tool bar.
151 ACTION is the suggested action from the source, and TYPES are the
152 types the drop data can have. This function only accepts drops with
153 types in `x-dnd-known-types'. It always returns the action private."
154 (let ((type (x-dnd-choose-type types
)))
155 (when type
(cons 'private type
))))
158 (defun x-dnd-current-type (frame-or-window)
159 "Return the type we want the DND data to be in for the current drop.
160 FRAME-OR-WINDOW is the frame or window that the mouse is over."
161 (aref (x-dnd-get-state-for-frame frame-or-window
) 4))
163 (defun x-dnd-forget-drop (frame-or-window)
164 "Remove all state for the last drop.
165 FRAME-OR-WINDOW is the frame or window that the mouse is over."
166 (setcdr (x-dnd-get-state-cons-for-frame frame-or-window
)
167 (copy-sequence x-dnd-empty-state
)))
169 (defun x-dnd-maybe-call-test-function (window action
)
170 "Call `x-dnd-test-function' if something has changed.
171 WINDOW is the window the mouse is over. ACTION is the suggested
172 action from the source. If nothing has changed, return the last
173 action and type we got from `x-dnd-test-function'."
174 (let ((buffer (when (and (windowp window
) (window-live-p window
))
175 (window-buffer window
)))
176 (current-state (x-dnd-get-state-for-frame window
)))
177 (when (or (not (equal buffer
(aref current-state
0)))
178 (not (equal window
(aref current-state
1)))
179 (not (equal action
(aref current-state
3))))
181 (when buffer
(set-buffer buffer
))
182 (let* ((action-type (funcall x-dnd-test-function
185 (aref current-state
2)))
186 (handler (cdr (assoc (cdr action-type
) x-dnd-types-alist
))))
187 ;; Ignore action-type if we have no handler.
189 (x-dnd-save-state window
191 (when handler action-type
)))))))
192 (let ((current-state (x-dnd-get-state-for-frame window
)))
193 (cons (aref current-state
5)
194 (aref current-state
4))))
196 (defun x-dnd-save-state (window action action-type
&optional types extra-data
)
197 "Save the state of the current drag and drop.
198 WINDOW is the window the mouse is over. ACTION is the action suggested
199 by the source. ACTION-TYPE is the result of calling `x-dnd-test-function'.
200 If given, TYPES are the types for the drop data that the source supports.
201 EXTRA-DATA is data needed for a specific protocol."
202 (let ((current-state (x-dnd-get-state-for-frame window
)))
203 (aset current-state
5 (car action-type
))
204 (aset current-state
4 (cdr action-type
))
205 (aset current-state
3 action
)
206 (when types
(aset current-state
2 types
))
207 (when extra-data
(aset current-state
6 extra-data
))
208 (aset current-state
1 window
)
209 (aset current-state
0 (if (and (windowp window
)
210 (window-live-p window
))
211 (window-buffer window
) nil
))
212 (setcdr (x-dnd-get-state-cons-for-frame window
) current-state
)))
215 (defun x-dnd-handle-moz-url (window action data
)
216 "Handle one item of type text/x-moz-url.
217 WINDOW is the window where the drop happened. ACTION is ignored.
218 DATA is the moz-url, which is formatted as two strings separated by \r\n.
219 The first string is the URL, the second string is the title of that URL.
220 DATA is encoded in utf-16. Decode the URL and call `x-dnd-handle-uri-list'."
221 ;; Mozilla and applications based on it (Galeon for example) uses
222 ;; text/unicode, but it is impossible to tell if it is le or be. Use what
223 ;; the machine Emacs runs on use. This looses if dropping between machines
224 ;; with different endian, but it is the best we can do.
225 (let* ((coding (if (eq (byteorder) ?B
) 'utf-16be
'utf-16le
))
226 (string (decode-coding-string data coding
))
227 (strings (split-string string
"[\r\n]" t
))
228 ;; Can one drop more than one moz-url ?? Assume not.
230 (title (car (cdr strings
))))
231 (x-dnd-handle-uri-list window action url
)))
233 (defun x-dnd-insert-utf8-text (window action text
)
234 "Decode the UTF-8 text and insert it at point.
235 TEXT is the text as a string, WINDOW is the window where the drop happened."
236 (dnd-insert-text window action
(decode-coding-string text
'utf-8
)))
238 (defun x-dnd-insert-utf16-text (window action text
)
239 "Decode the UTF-16 text and insert it at point.
240 TEXT is the text as a string, WINDOW is the window where the drop happened."
241 ;; See comment in x-dnd-handle-moz-url about coding.
242 (let ((coding (if (eq (byteorder) ?B
) 'utf-16be
'utf-16le
)))
243 (dnd-insert-text window action
(decode-coding-string text coding
))))
245 (defun x-dnd-insert-ctext (window action text
)
246 "Decode the compound text and insert it at point.
247 TEXT is the text as a string, WINDOW is the window where the drop happened."
248 (dnd-insert-text window action
249 (decode-coding-string text
250 'compound-text-with-extensions
)))
252 (defun x-dnd-handle-uri-list (window action string
)
253 "Split an uri-list into separate URIs and call `dnd-handle-one-url'.
254 WINDOW is the window where the drop happened.
255 STRING is the uri-list as a string. The URIs are separated by \r\n."
256 (let ((uri-list (split-string string
"[\0\r\n]" t
))
258 (dolist (bf uri-list
)
259 ;; If one URL is handeled, treat as if the whole drop succeeded.
260 (let ((did-action (dnd-handle-one-url window action bf
)))
261 (when did-action
(setq retval did-action
))))
264 (defun x-dnd-handle-file-name (window action string
)
265 "Convert file names to URLs and call `dnd-handle-one-url'.
266 WINDOW is the window where the drop happened.
267 STRING is the file names as a string, separated by nulls."
268 (let ((uri-list (split-string string
"[\0\r\n]" t
))
269 (coding (and default-enable-multibyte-characters
270 (or file-name-coding-system
271 default-file-name-coding-system
)))
273 (dolist (bf uri-list
)
274 ;; If one URL is handeled, treat as if the whole drop succeeded.
275 (if coding
(setq bf
(encode-coding-string bf coding
)))
276 (let* ((file-uri (concat "file://"
277 (mapconcat 'url-hexify-string
278 (split-string bf
"/") "/")))
279 (did-action (dnd-handle-one-url window action file-uri
)))
280 (when did-action
(setq retval did-action
))))
284 (defun x-dnd-choose-type (types &optional known-types
)
285 "Choose which type we want to receive for the drop.
286 TYPES are the types the source of the drop offers, a vector of type names
287 as strings or symbols. Select among the types in `x-dnd-known-types' or
288 KNOWN-TYPES if given, and return that type name.
289 If no suitable type is found, return nil."
290 (let* ((known-list (or known-types x-dnd-known-types
))
291 (first-known-type (car known-list
))
293 (found (when first-known-type
295 (dotimes (i (length types-array
))
296 (let* ((type (aref types-array i
))
297 (typename (if (symbolp type
)
298 (symbol-name type
) type
)))
299 (when (equal first-known-type typename
)
300 (throw 'done first-known-type
))))
303 (if (and (not found
) (cdr known-list
))
304 (x-dnd-choose-type types
(cdr known-list
))
307 (defun x-dnd-drop-data (event frame window data type
)
308 "Drop one data item onto a frame.
309 EVENT is the client message for the drop, FRAME is the frame the drop occurred
310 on. WINDOW is the window of FRAME where the drop happened. DATA is the data
311 received from the source, and type is the type for DATA, see
312 `x-dnd-types-alist').
314 Returns the action used (move, copy, link, private) if drop was successful,
316 (let* ((type-info (assoc type x-dnd-types-alist
))
317 (handler (cdr type-info
))
318 (state (x-dnd-get-state-for-frame frame
))
319 (action (aref state
5))
320 (w (posn-window (event-start event
))))
322 (if (and (windowp w
) (window-live-p w
)
323 (not (window-minibuffer-p w
))
324 (not (window-dedicated-p w
)))
325 ;; If dropping in an ordinary window which we could use,
326 ;; let dnd-open-file-other-window specify what to do.
328 (when (not mouse-yank-at-point
)
329 (goto-char (posn-point (event-start event
))))
330 (funcall handler window action data
))
331 ;; If we can't display the file here,
332 ;; make a new window for it.
333 (let ((dnd-open-file-other-window t
))
335 (funcall handler window action data
))))))
337 (defun x-dnd-handle-drag-n-drop-event (event)
338 "Receive drag and drop events (X client messages).
339 Currently XDND, Motif and old KDE 1.x protocols are recognized."
341 (let* ((client-message (car (cdr (cdr event
))))
342 (window (posn-window (event-start event
)))
343 (message-atom (aref client-message
0))
344 (frame (aref client-message
1))
345 (format (aref client-message
2))
346 (data (aref client-message
3)))
348 (cond ((equal "DndProtocol" message-atom
) ; Old KDE 1.x.
349 (x-dnd-handle-old-kde event frame window message-atom format data
))
351 ((equal "_MOTIF_DRAG_AND_DROP_MESSAGE" message-atom
) ; Motif
352 (x-dnd-handle-motif event frame window message-atom format data
))
354 ((and (> (length message-atom
) 4) ; XDND protocol.
355 (equal "Xdnd" (substring message-atom
0 4)))
356 (x-dnd-handle-xdnd event frame window message-atom format data
)))))
359 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
360 ;;; Old KDE protocol. Only dropping of files.
362 (defun x-dnd-handle-old-kde (event frame window message format data
)
363 "Open the files in a KDE 1.x drop."
364 (let ((values (x-window-property "DndSelection" frame nil
0 t
)))
365 (x-dnd-handle-uri-list window
'private
366 (replace-regexp-in-string "\0$" "" values
))))
367 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
371 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
374 (defvar x-dnd-xdnd-to-action
375 '(("XdndActionPrivate" . private
)
376 ("XdndActionCopy" . copy
)
377 ("XdndActionMove" . move
)
378 ("XdndActionLink" . link
)
379 ("XdndActionAsk" . ask
))
380 "Mapping from XDND action types to lisp symbols.")
382 (defun x-dnd-init-xdnd-for-frame (frame)
383 "Set the XdndAware property for FRAME to indicate that we do XDND."
384 (x-change-window-property "XdndAware"
385 '(5) ;; The version of XDND we support.
388 (defun x-dnd-get-drop-width-height (frame w accept
)
389 "Return the widht/height to be sent in a XDndStatus message.
390 FRAME is the frame and W is the window where the drop happened.
391 If ACCEPT is nil return 0 (empty rectangle),
392 otherwise if W is a window, return its widht/height,
393 otherwise return the frame width/height."
395 (if (windowp w
) ;; w is not a window if dropping on the menu bar,
396 ;; scroll bar or tool bar.
397 (let ((edges (window-inside-pixel-edges w
)))
399 (- (nth 2 edges
) (nth 0 edges
)) ;; right - left
400 (- (nth 3 edges
) (nth 1 edges
)))) ;; bottom - top
401 (cons (frame-pixel-width frame
)
402 (frame-pixel-height frame
)))
405 (defun x-dnd-get-drop-x-y (frame w
)
406 "Return the x/y coordinates to be sent in a XDndStatus message.
407 Coordinates are required to be absolute.
408 FRAME is the frame and W is the window where the drop happened.
409 If W is a window, return its absolute corrdinates,
410 otherwise return the frame coordinates."
411 (let* ((frame-left (frame-parameter frame
'left
))
412 ;; If the frame is outside the display, frame-left looks like
413 ;; '(0 -16). Extract the -16.
414 (frame-real-left (if (consp frame-left
) (car (cdr frame-left
))
416 (frame-top (frame-parameter frame
'top
))
417 (frame-real-top (if (consp frame-top
) (car (cdr frame-top
))
420 (let ((edges (window-inside-pixel-edges w
)))
422 (+ frame-real-left
(nth 0 edges
))
423 (+ frame-real-top
(nth 1 edges
))))
424 (cons frame-real-left frame-real-top
))))
426 (defun x-dnd-handle-xdnd (event frame window message format data
)
427 "Receive one XDND event (client message) and send the appropriate reply.
428 EVENT is the client message. FRAME is where the mouse is now.
429 WINDOW is the window within FRAME where the mouse is now.
430 FORMAT is 32 (not used). MESSAGE is the data part of an XClientMessageEvent."
431 (cond ((equal "XdndEnter" message
)
432 (let* ((flags (aref data
1))
433 (version (and (consp flags
) (ash (car flags
) -
8)))
434 (more-than-3 (and (consp flags
) (cdr flags
)))
435 (dnd-source (aref data
0)))
436 (if version
;; If flags is bad, version will be nil.
439 (if (> more-than-3
0)
440 (x-window-property "XdndTypeList"
441 frame
"AnyPropertyType"
443 (vector (x-get-atom-name (aref data
2))
444 (x-get-atom-name (aref data
3))
445 (x-get-atom-name (aref data
4))))))))
447 ((equal "XdndPosition" message
)
448 (let* ((x (car (aref data
2)))
449 (y (cdr (aref data
2)))
450 (action (x-get-atom-name (aref data
4)))
451 (dnd-source (aref data
0))
452 (dnd-time (aref data
3))
453 (action-type (x-dnd-maybe-call-test-function
455 (cdr (assoc action x-dnd-xdnd-to-action
))))
456 (reply-action (car (rassoc (car action-type
)
457 x-dnd-xdnd-to-action
)))
458 (accept ;; 1 = accept, 0 = reject
459 (if (and reply-action action-type
) 1 0))
461 (list (string-to-number
462 (frame-parameter frame
'outer-window-id
))
463 accept
;; 1 = Accept, 0 = reject.
464 (x-dnd-get-drop-x-y frame window
)
465 (x-dnd-get-drop-width-height
466 frame window
(eq accept
1))
469 (x-send-client-message
470 frame dnd-source frame
"XdndStatus" 32 list-to-send
)
473 ((equal "XdndLeave" message
)
474 (x-dnd-forget-drop window
))
476 ((equal "XdndDrop" message
)
477 (if (windowp window
) (select-window window
))
478 (let* ((dnd-source (aref data
0))
479 (value (and (x-dnd-current-type window
)
480 (x-get-selection-internal
482 (intern (x-dnd-current-type window
)))))
483 success action ret-action
)
485 (setq action
(if value
487 (x-dnd-drop-data event frame window value
488 (x-dnd-current-type window
))
490 (message "Error: %s" info
)
493 (setq success
(if action
1 0))
496 (or (car (rassoc action x-dnd-xdnd-to-action
))
500 (x-send-client-message
501 frame dnd-source frame
"XdndFinished" 32
502 (list (string-to-number (frame-parameter frame
'outer-window-id
))
503 success
;; 1 = Success, 0 = Error
504 (if success
"XdndActionPrivate" 0)
506 (x-dnd-forget-drop window
)))
508 (t (error "Unknown XDND message %s %s" message data
))))
510 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
513 (defun x-dnd-init-motif-for-frame (frame)
514 "Set _MOTIF_DRAG_RECEIVER_INFO for FRAME to indicate that we do Motif DND."
515 (x-change-window-property "_MOTIF_DRAG_RECEIVER_INFO"
518 0 ; The Motif DND version.
519 5 ; We want drag dynamic.
521 0 0 0 0 0 0) ; Property must be 16 bytes.
522 frame
"_MOTIF_DRAG_RECEIVER_INFO" 8 t
))
524 (defun x-dnd-get-motif-value (data offset size byteorder
)
526 (if (eq byteorder ?l
)
527 (+ (ash (aref data
(1+ offset
)) 8)
529 (+ (ash (aref data offset
) 8)
530 (aref data
(1+ offset
)))))
533 (if (eq byteorder ?l
)
534 (cons (+ (ash (aref data
(+ 3 offset
)) 8)
535 (aref data
(+ 2 offset
)))
536 (+ (ash (aref data
(1+ offset
)) 8)
538 (cons (+ (ash (aref data offset
) 8)
539 (aref data
(1+ offset
)))
540 (+ (ash (aref data
(+ 2 offset
)) 8)
541 (aref data
(+ 3 offset
))))))))
543 (defun x-dnd-motif-value-to-list (value size byteorder
)
544 (let ((bytes (cond ((eq size
2)
545 (list (logand (lsh value -
8) ?
\xff)
546 (logand value ?
\xff)))
550 (list (logand (lsh (car value
) -
8) ?
\xff)
551 (logand (car value
) ?
\xff)
552 (logand (lsh (cdr value
) -
8) ?
\xff)
553 (logand (cdr value
) ?
\xff))
554 (list (logand (lsh value -
24) ?
\xff)
555 (logand (lsh value -
16) ?
\xff)
556 (logand (lsh value -
8) ?
\xff)
557 (logand value ?
\xff)))))))
558 (if (eq byteorder ?l
)
563 (defvar x-dnd-motif-message-types
564 '((0 . XmTOP_LEVEL_ENTER
)
565 (1 . XmTOP_LEVEL_LEAVE
)
567 (3 . XmDROP_SITE_ENTER
)
568 (4 . XmDROP_SITE_LEAVE
)
571 (7 . XmDRAG_DROP_FINISH
)
572 (8 . XmOPERATION_CHANGED
))
573 "Mapping from numbers to Motif DND message types.")
575 (defvar x-dnd-motif-to-action
578 (3 . link
) ; Both 3 and 4 has been seen as link.
580 (2 . private
)) ; Motif does not have private, so use copy for private.
581 "Mapping from number to operation for Motif DND.")
583 (defun x-dnd-handle-motif (event frame window message-atom format data
)
584 (let* ((message-type (cdr (assoc (aref data
0) x-dnd-motif-message-types
)))
585 (source-byteorder (aref data
1))
586 (my-byteorder (byteorder))
587 (source-flags (x-dnd-get-motif-value data
2 2 source-byteorder
))
588 (source-action (cdr (assoc (logand ?\xF source-flags
)
589 x-dnd-motif-to-action
))))
591 (cond ((eq message-type
'XmTOP_LEVEL_ENTER
)
592 (let* ((dnd-source (x-dnd-get-motif-value
593 data
8 4 source-byteorder
))
594 (selection-atom (x-dnd-get-motif-value
595 data
12 4 source-byteorder
))
596 (atom-name (x-get-atom-name selection-atom
))
597 (types (when atom-name
598 (x-get-selection-internal (intern atom-name
)
600 (x-dnd-forget-drop frame
)
601 (when types
(x-dnd-save-state window nil nil
605 ;; Can not forget drop here, LEAVE comes before DROP_START and
606 ;; we need the state in DROP_START.
607 ((eq message-type
'XmTOP_LEVEL_LEAVE
)
610 ((eq message-type
'XmDRAG_MOTION
)
611 (let* ((state (x-dnd-get-state-for-frame frame
))
612 (timestamp (x-dnd-motif-value-to-list
613 (x-dnd-get-motif-value data
4 4
616 (x (x-dnd-motif-value-to-list
617 (x-dnd-get-motif-value data
8 2 source-byteorder
)
619 (y (x-dnd-motif-value-to-list
620 (x-dnd-get-motif-value data
10 2 source-byteorder
)
622 (dnd-source (aref state
6))
623 (first-move (not (aref state
3)))
624 (action-type (x-dnd-maybe-call-test-function
627 (reply-action (car (rassoc (car action-type
)
628 x-dnd-motif-to-action
)))
630 (x-dnd-motif-value-to-list
633 ?
\x30 ; 30: valid drop site
634 ?
\x700
) ; 700: can do copy, move or link
635 ?
\x30) ; 30: drop site, but noop.
639 (+ ?
\x80 ; 0x80 indicates a reply.
641 3 ; First time, reply is SITE_ENTER.
642 2)) ; Not first time, reply is DRAG_MOTION.
648 (x-send-client-message frame
651 "_MOTIF_DRAG_AND_DROP_MESSAGE"
655 ((eq message-type
'XmOPERATION_CHANGED
)
656 (let* ((state (x-dnd-get-state-for-frame frame
))
657 (timestamp (x-dnd-motif-value-to-list
658 (x-dnd-get-motif-value data
4 4 source-byteorder
)
660 (dnd-source (aref state
6))
661 (action-type (x-dnd-maybe-call-test-function
664 (reply-action (car (rassoc (car action-type
)
665 x-dnd-motif-to-action
)))
667 (x-dnd-motif-value-to-list
670 ?
\x30 ; 30: valid drop site
671 ?
\x700
) ; 700: can do copy, move or link
672 ?
\x30) ; 30: drop site, but noop
676 (+ ?
\x80 ; 0x80 indicates a reply.
677 8) ; 8 is OPERATION_CHANGED
681 (x-send-client-message frame
684 "_MOTIF_DRAG_AND_DROP_MESSAGE"
688 ((eq message-type
'XmDROP_START
)
689 (let* ((x (x-dnd-motif-value-to-list
690 (x-dnd-get-motif-value data
8 2 source-byteorder
)
692 (y (x-dnd-motif-value-to-list
693 (x-dnd-get-motif-value data
10 2 source-byteorder
)
695 (selection-atom (x-dnd-get-motif-value
696 data
12 4 source-byteorder
))
697 (atom-name (x-get-atom-name selection-atom
))
698 (dnd-source (x-dnd-get-motif-value
699 data
16 4 source-byteorder
))
700 (action-type (x-dnd-maybe-call-test-function
703 (reply-action (car (rassoc (car action-type
)
704 x-dnd-motif-to-action
)))
706 (x-dnd-motif-value-to-list
709 ?
\x30 ; 30: valid drop site
710 ?
\x700
) ; 700: can do copy, move or link
711 (+ ?
\x30 ; 30: drop site, but noop.
712 ?
\x200
)) ; 200: drop cancel.
716 (+ ?
\x80 ; 0x80 indicates a reply.
722 (timestamp (x-dnd-get-motif-value
723 data
4 4 source-byteorder
))
726 (x-send-client-message frame
729 "_MOTIF_DRAG_AND_DROP_MESSAGE"
733 (when (and reply-action atom-name
)
734 (let* ((value (x-get-selection-internal
736 (intern (x-dnd-current-type window
)))))
739 (x-dnd-drop-data event frame window value
740 (x-dnd-current-type window
))
742 (message "Error: %s" info
)
744 (x-get-selection-internal
746 (if action
'XmTRANSFER_SUCCESS
'XmTRANSFER_FAILURE
)
748 (x-dnd-forget-drop frame
)))
750 (t (error "Unknown Motif DND message %s %s" message-atom data
)))))
757 ;;; arch-tag: b621fb7e-50da-4323-850b-5fc71ae64621
758 ;;; x-dnd.el ends here