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| author | Po Lu <luangruo@yahoo.com> | 2022-03-31 17:21:37 +0800 |
|---|---|---|
| committer | Po Lu <luangruo@yahoo.com> | 2022-03-31 17:21:37 +0800 |
| commit | 1d4306a8a770cb73db3b39301ee41e15f9e3656f (patch) | |
| tree | b40831da1ca6a8aaf016e2d4e1c556d4ff22dfc9 /lisp | |
| parent | 6f973faa912a5ac1ba643c6f5deb0c02baa0ba6d (diff) | |
| download | emacs-1d4306a8a770cb73db3b39301ee41e15f9e3656f.tar.gz emacs-1d4306a8a770cb73db3b39301ee41e15f9e3656f.tar.bz2 emacs-1d4306a8a770cb73db3b39301ee41e15f9e3656f.zip | |
Implement Motif drop protocol
This is the second most widely implemented drag-and-drop
protocol on X Windows, but seems to have some unsolvable
problems (i.e. stuff will keep accumulating in the drag window
as long the target lists keep changing.) The implementation is
not yet complete and doesn't work with some programs.
* lisp/select.el (xselect-convert-xm-special): New functions.
(selection-converter-alist): Add new converters.
* lisp/x-dnd.el (x-dnd-handle-motif): Ignore messages sent by
the receiver.
* src/xterm.c (xm_targets_table_byte_order): New enum;
(SWAPCARD32, SWAPCARD16): New macros.
(xm_targets_table_rec, xm_drop_start_message)
(xm_drag_initiator_info, xm_drag_receiver_info): New structures.
(XM_DRAG_SIDE_EFFECT, xm_read_targets_table_header)
(xm_read_targets_table_rec, xm_find_targets_table_idx)
(x_atoms_compare, xm_write_targets_table)
(xm_write_drag_initiator_info, xm_get_drag_window)
(xm_setup_dnd_targets, xm_send_drop_message)
(xm_read_drag_receiver_info): New functions.
(x_dnd_compute_toplevels): Correctly free some temp data.
(x_dnd_get_window_proxy, x_dnd_get_window_proto)
(x_set_frame_alpha): Likewise.
(handle_one_xevent): If the window has no XDND proto but has
motif drag receiver data, send a motif drop protocol request.
(x_term_init): New atoms for Motif DND support.
* src/xterm.h (struct x_display_info): Add new atoms.
Diffstat (limited to 'lisp')
| -rw-r--r-- | lisp/select.el | 7 | ||||
| -rw-r--r-- | lisp/x-dnd.el | 321 |
2 files changed, 168 insertions, 160 deletions
diff --git a/lisp/select.el b/lisp/select.el index 7b9475a6402..ee65678c69d 100644 --- a/lisp/select.el +++ b/lisp/select.el @@ -655,6 +655,9 @@ VALUE is the local selection value of SELECTION." (stringp value) (file-exists-p value))) +(defun xselect-convert-xm-special (_selection _type _value) + "") + (setq selection-converter-alist '((TEXT . xselect-convert-to-string) (COMPOUND_TEXT . xselect-convert-to-string) @@ -679,7 +682,9 @@ VALUE is the local selection value of SELECTION." (ATOM . xselect-convert-to-atom) (INTEGER . xselect-convert-to-integer) (SAVE_TARGETS . xselect-convert-to-save-targets) - (_EMACS_INTERNAL . xselect-convert-to-identity))) + (_EMACS_INTERNAL . xselect-convert-to-identity) + (XmTRANSFER_SUCCESS . xselect-convert-xm-special) + (XmTRANSFER_FAILURE . xselect-convert-xm-special))) (provide 'select) diff --git a/lisp/x-dnd.el b/lisp/x-dnd.el index 17e65adc64e..e26703ad848 100644 --- a/lisp/x-dnd.el +++ b/lisp/x-dnd.el @@ -603,174 +603,177 @@ FORMAT is 32 (not used). MESSAGE is the data part of an XClientMessageEvent." (2 . private)) ; Motif does not have private, so use copy for private. "Mapping from number to operation for Motif DND.") -(defun x-dnd-handle-motif (event frame window message-atom _format data) - (let* ((message-type (cdr (assoc (aref data 0) x-dnd-motif-message-types))) +(defun x-dnd-handle-motif (event frame window _message-atom _format data) + (let* ((message-type (cdr (assoc (logand (aref data 0) #x3f) + x-dnd-motif-message-types))) + (initiator-p (eq (lsh (aref data 0) -7) 0)) (source-byteorder (aref data 1)) (my-byteorder (byteorder)) (source-flags (x-dnd-get-motif-value data 2 2 source-byteorder)) (source-action (cdr (assoc (logand ?\xF source-flags) x-dnd-motif-to-action)))) - (cond ((eq message-type 'XmTOP_LEVEL_ENTER) - (let* ((dnd-source (x-dnd-get-motif-value - data 8 4 source-byteorder)) - (selection-atom (x-dnd-get-motif-value - data 12 4 source-byteorder)) - (atom-name (x-get-atom-name selection-atom)) - (types (when atom-name - (x-get-selection-internal (intern atom-name) - 'TARGETS)))) - (x-dnd-forget-drop frame) - (when types (x-dnd-save-state window nil nil - types - dnd-source)))) - - ;; Can not forget drop here, LEAVE comes before DROP_START and - ;; we need the state in DROP_START. - ((eq message-type 'XmTOP_LEVEL_LEAVE) - nil) - - ((eq message-type 'XmDRAG_MOTION) - (let* ((state (x-dnd-get-state-for-frame frame)) - (timestamp (x-dnd-motif-value-to-list - (x-dnd-get-motif-value data 4 4 - source-byteorder) - 4 my-byteorder)) - (x (x-dnd-motif-value-to-list - (x-dnd-get-motif-value data 8 2 source-byteorder) + (when initiator-p + (cond ((eq message-type 'XmTOP_LEVEL_ENTER) + (let* ((dnd-source (x-dnd-get-motif-value + data 8 4 source-byteorder)) + (selection-atom (x-dnd-get-motif-value + data 12 4 source-byteorder)) + (atom-name (x-get-atom-name selection-atom)) + (types (when atom-name + (x-get-selection-internal (intern atom-name) + 'TARGETS)))) + (x-dnd-forget-drop frame) + (when types (x-dnd-save-state window nil nil + types + dnd-source)))) + + ;; Can not forget drop here, LEAVE comes before DROP_START and + ;; we need the state in DROP_START. + ((eq message-type 'XmTOP_LEVEL_LEAVE) + nil) + + ((eq message-type 'XmDRAG_MOTION) + (let* ((state (x-dnd-get-state-for-frame frame)) + (timestamp (x-dnd-motif-value-to-list + (x-dnd-get-motif-value data 4 4 + source-byteorder) + 4 my-byteorder)) + (x (x-dnd-motif-value-to-list + (x-dnd-get-motif-value data 8 2 source-byteorder) + 2 my-byteorder)) + (y (x-dnd-motif-value-to-list + (x-dnd-get-motif-value data 10 2 source-byteorder) + 2 my-byteorder)) + (dnd-source (aref state 6)) + (first-move (not (aref state 3))) + (action-type (x-dnd-maybe-call-test-function + window + source-action)) + (reply-action (car (rassoc (car action-type) + x-dnd-motif-to-action))) + (reply-flags + (x-dnd-motif-value-to-list + (if reply-action + (+ reply-action + ?\x30 ; 30: valid drop site + ?\x700) ; 700: can do copy, move or link + ?\x30) ; 30: drop site, but noop. 2 my-byteorder)) - (y (x-dnd-motif-value-to-list - (x-dnd-get-motif-value data 10 2 source-byteorder) - 2 my-byteorder)) - (dnd-source (aref state 6)) - (first-move (not (aref state 3))) - (action-type (x-dnd-maybe-call-test-function - window - source-action)) - (reply-action (car (rassoc (car action-type) - x-dnd-motif-to-action))) - (reply-flags - (x-dnd-motif-value-to-list - (if reply-action - (+ reply-action - ?\x30 ; 30: valid drop site - ?\x700) ; 700: can do copy, move or link - ?\x30) ; 30: drop site, but noop. - 2 my-byteorder)) - (reply (append - (list - (+ ?\x80 ; 0x80 indicates a reply. - (if first-move - 3 ; First time, reply is SITE_ENTER. - 2)) ; Not first time, reply is DRAG_MOTION. - my-byteorder) - reply-flags - timestamp - x - y))) - (x-send-client-message frame - dnd-source - frame - "_MOTIF_DRAG_AND_DROP_MESSAGE" - 8 - reply))) - - ((eq message-type 'XmOPERATION_CHANGED) - (let* ((state (x-dnd-get-state-for-frame frame)) - (timestamp (x-dnd-motif-value-to-list - (x-dnd-get-motif-value data 4 4 source-byteorder) - 4 my-byteorder)) - (dnd-source (aref state 6)) - (action-type (x-dnd-maybe-call-test-function - window - source-action)) - (reply-action (car (rassoc (car action-type) - x-dnd-motif-to-action))) - (reply-flags - (x-dnd-motif-value-to-list - (if reply-action - (+ reply-action - ?\x30 ; 30: valid drop site - ?\x700) ; 700: can do copy, move or link - ?\x30) ; 30: drop site, but noop - 2 my-byteorder)) - (reply (append - (list - (+ ?\x80 ; 0x80 indicates a reply. - 8) ; 8 is OPERATION_CHANGED - my-byteorder) - reply-flags - timestamp))) - (x-send-client-message frame - dnd-source - frame - "_MOTIF_DRAG_AND_DROP_MESSAGE" - 8 - reply))) - - ((eq message-type 'XmDROP_START) - (let* ((x (x-dnd-motif-value-to-list - (x-dnd-get-motif-value data 8 2 source-byteorder) + (reply (append + (list + (+ ?\x80 ; 0x80 indicates a reply. + (if first-move + 3 ; First time, reply is SITE_ENTER. + 2)) ; Not first time, reply is DRAG_MOTION. + my-byteorder) + reply-flags + timestamp + x + y))) + (x-send-client-message frame + dnd-source + frame + "_MOTIF_DRAG_AND_DROP_MESSAGE" + 8 + reply))) + + ((eq message-type 'XmOPERATION_CHANGED) + (let* ((state (x-dnd-get-state-for-frame frame)) + (timestamp (x-dnd-motif-value-to-list + (x-dnd-get-motif-value data 4 4 source-byteorder) + 4 my-byteorder)) + (dnd-source (aref state 6)) + (action-type (x-dnd-maybe-call-test-function + window + source-action)) + (reply-action (car (rassoc (car action-type) + x-dnd-motif-to-action))) + (reply-flags + (x-dnd-motif-value-to-list + (if reply-action + (+ reply-action + ?\x30 ; 30: valid drop site + ?\x700) ; 700: can do copy, move or link + ?\x30) ; 30: drop site, but noop 2 my-byteorder)) - (y (x-dnd-motif-value-to-list - (x-dnd-get-motif-value data 10 2 source-byteorder) + (reply (append + (list + (+ ?\x80 ; 0x80 indicates a reply. + 8) ; 8 is OPERATION_CHANGED + my-byteorder) + reply-flags + timestamp))) + (x-send-client-message frame + dnd-source + frame + "_MOTIF_DRAG_AND_DROP_MESSAGE" + 8 + reply))) + + ((eq message-type 'XmDROP_START) + (let* ((x (x-dnd-motif-value-to-list + (x-dnd-get-motif-value data 8 2 source-byteorder) + 2 my-byteorder)) + (y (x-dnd-motif-value-to-list + (x-dnd-get-motif-value data 10 2 source-byteorder) + 2 my-byteorder)) + (selection-atom (x-dnd-get-motif-value + data 12 4 source-byteorder)) + (atom-name (x-get-atom-name selection-atom)) + (dnd-source (x-dnd-get-motif-value + data 16 4 source-byteorder)) + (action-type (x-dnd-maybe-call-test-function + window + source-action)) + (reply-action (car (rassoc (car action-type) + x-dnd-motif-to-action))) + (reply-flags + (x-dnd-motif-value-to-list + (if reply-action + (+ reply-action + ?\x30 ; 30: valid drop site + ?\x700) ; 700: can do copy, move or link + (+ ?\x30 ; 30: drop site, but noop. + ?\x200)) ; 200: drop cancel. 2 my-byteorder)) - (selection-atom (x-dnd-get-motif-value - data 12 4 source-byteorder)) - (atom-name (x-get-atom-name selection-atom)) - (dnd-source (x-dnd-get-motif-value - data 16 4 source-byteorder)) - (action-type (x-dnd-maybe-call-test-function - window - source-action)) - (reply-action (car (rassoc (car action-type) - x-dnd-motif-to-action))) - (reply-flags - (x-dnd-motif-value-to-list - (if reply-action - (+ reply-action - ?\x30 ; 30: valid drop site - ?\x700) ; 700: can do copy, move or link - (+ ?\x30 ; 30: drop site, but noop. - ?\x200)) ; 200: drop cancel. - 2 my-byteorder)) - (reply (append - (list - (+ ?\x80 ; 0x80 indicates a reply. - 5) ; DROP_START. - my-byteorder) - reply-flags - x - y)) - (timestamp (x-dnd-get-motif-value - data 4 4 source-byteorder)) - action) - - (x-send-client-message frame - dnd-source - frame - "_MOTIF_DRAG_AND_DROP_MESSAGE" - 8 - reply) - (setq action - (when (and reply-action atom-name) - (let* ((value (x-get-selection-internal - (intern atom-name) - (intern (x-dnd-current-type window))))) - (when value - (condition-case info - (x-dnd-drop-data event frame window value - (x-dnd-current-type window)) - (error - (message "Error: %s" info) - nil)))))) - (x-get-selection-internal - (intern atom-name) - (if action 'XmTRANSFER_SUCCESS 'XmTRANSFER_FAILURE) - timestamp) - (x-dnd-forget-drop frame))) - - (t (error "Unknown Motif DND message %s %s" message-atom data))))) + (reply (append + (list + (+ ?\x80 ; 0x80 indicates a reply. + 5) ; DROP_START. + my-byteorder) + reply-flags + x + y)) + (timestamp (x-dnd-get-motif-value + data 4 4 source-byteorder)) + action) + + (x-send-client-message frame + dnd-source + frame + "_MOTIF_DRAG_AND_DROP_MESSAGE" + 8 + reply) + (setq action + (when (and reply-action atom-name) + (let* ((value (x-get-selection-internal + (intern atom-name) + (intern (x-dnd-current-type window))))) + (when value + (condition-case info + (x-dnd-drop-data event frame window value + (x-dnd-current-type window)) + (error + (message "Error: %s" info) + nil)))))) + (x-get-selection-internal + (intern atom-name) + (if action 'XmTRANSFER_SUCCESS 'XmTRANSFER_FAILURE) + timestamp) + (x-dnd-forget-drop frame))) + + (t (message "Unknown Motif drag-and-drop message: %s" (logand (aref data 0) #x3f))))))) ;;; |