-
;;; x-dnd.el --- drag and drop support for X.
;; Copyright (C) 2004
;;; Commentary:
;; This file provides the drop part only. Currently supported protocols
-;; are XDND and the old KDE 1.x protocol.
+;; are XDND, Motif and the old KDE 1.x protocol.
;;; Code:
-;;; Customizable variables
-
+(require 'dnd)
+;;; Customizable variables
(defcustom x-dnd-test-function 'x-dnd-default-test-function
"The function drag and drop uses to determine if to accept or reject a drop.
The function takes three arguments, WINDOW ACTION and TYPES.
the wanted action as car and the wanted type as cdr. The wanted action
can be copy, move, link, ask or private.
The default value for this variable is `x-dnd-default-test-function'."
+ :version "22.1"
:type 'symbol
:group 'x)
-(defcustom x-dnd-protocol-alist
- '(
- ("^file:///" . x-dnd-open-local-file) ; XDND format.
- ("^file://" . x-dnd-open-file) ; URL with host
- ("^file:" . x-dnd-open-local-file) ; Old KDE, Motif, Sun
- )
-
- "The functions to call for different protocols when a drop is made.
-This variable is used by `x-dnd-handle-uri-list' and `x-dnd-handle-moz-url'.
-The list contains of (REGEXP . FUNCTION) pairs.
-The functions shall take two arguments, URL, which is the URL dropped and
-ACTION which is the action to be performed for the drop (move, copy, link,
-private or ask).
-If no match is found here, and the value of `browse-url-browser-function'
-is a pair of (REGEXP . FUNCTION), those regexps are tried for a match.
-Insertion of text is not handeled by these functions, see `x-dnd-types-alist'
-for that.
-The function shall return the action done (move, copy, link or private)
-if some action was made, or nil if the URL is ignored."
- :type 'alist
- :group 'x)
(defcustom x-dnd-types-alist
'(
("text/uri-list" . x-dnd-handle-uri-list)
("text/x-moz-url" . x-dnd-handle-moz-url)
- ("FILE_NAME" . x-dnd-handle-uri-list)
("_NETSCAPE_URL" . x-dnd-handle-uri-list)
+ ("FILE_NAME" . x-dnd-handle-file-name)
("UTF8_STRING" . x-dnd-insert-utf8-text)
("text/plain;charset=UTF-8" . x-dnd-insert-utf8-text)
("text/plain;charset=utf-8" . x-dnd-insert-utf8-text)
("text/unicode" . x-dnd-insert-utf16-text)
- ("text/plain" . x-dnd-insert-text)
- ("STRING" . x-dnd-insert-text)
- ("TEXT" . x-dnd-insert-text)
+ ("text/plain" . dnd-insert-text)
+ ("COMPOUND_TEXT" . x-dnd-insert-ctext)
+ ("STRING" . dnd-insert-text)
+ ("TEXT" . dnd-insert-text)
)
"Which function to call to handle a drop of that type.
If the type for the drop is not present, or the function is nil,
call to `x-dnd-test-function'. DATA is the drop data.
The function shall return the action used (copy, move, link or private) if drop
is successful, nil if not."
+ :version "22.1"
:type 'alist
:group 'x)
-(defcustom x-dnd-open-file-other-window nil
- "If non-nil, always use find-file-other-window to open dropped files."
- :type 'boolean
- :group 'x)
-
-;; Internal variables
-
-(defvar x-dnd-known-types
+(defcustom x-dnd-known-types
'("text/uri-list"
"text/x-moz-url"
- "FILE_NAME"
"_NETSCAPE_URL"
+ "FILE_NAME"
"UTF8_STRING"
"text/plain;charset=UTF-8"
"text/plain;charset=utf-8"
"text/unicode"
"text/plain"
+ "COMPOUND_TEXT"
"STRING"
"TEXT"
)
"The types accepted by default for dropped data.
-The types are chosen in the order they appear in the list.")
+The types are chosen in the order they appear in the list."
+ :version "22.1"
+ :type '(repeat string)
+ :group 'x
+)
+
+;; Internal variables
(defvar x-dnd-current-state nil
"The current state for a drop.
This is an alist with one entry for each display. The value for each display
is a vector that contains the state for drag and drop for that display.
-Elements in the vector are:
+Elements in the vector are:
Last buffer drag was in,
last window drag was in,
-types available for drop,
+types available for drop,
the action suggested by the source,
the type we want for the drop,
-the action we want for the drop.")
+the action we want for the drop,
+any protocol specific data.")
-(defvar x-dnd-empty-state [nil nil nil nil nil nil])
+(defvar x-dnd-empty-state [nil nil nil nil nil nil nil])
(defun x-dnd-init-frame (&optional frame)
"Setup drag and drop for FRAME (i.e. create appropriate properties)."
- (x-dnd-init-xdnd-for-frame frame))
+ (x-dnd-init-xdnd-for-frame frame)
+ (x-dnd-init-motif-for-frame frame))
(defun x-dnd-get-state-cons-for-frame (frame-or-window)
"Return the entry in x-dnd-current-state for a frame or window."
(window-frame frame-or-window)))
(display (frame-parameter frame 'display)))
(if (not (assoc display x-dnd-current-state))
- (push (cons display x-dnd-empty-state) x-dnd-current-state))
+ (push (cons display (copy-sequence x-dnd-empty-state))
+ x-dnd-current-state))
(assoc display x-dnd-current-state)))
(defun x-dnd-get-state-for-frame (frame-or-window)
(defun x-dnd-forget-drop (frame-or-window)
"Remove all state for the last drop.
FRAME-OR-WINDOW is the frame or window that the mouse is over."
- (setcdr (x-dnd-get-state-cons-for-frame frame-or-window) x-dnd-empty-state))
+ (setcdr (x-dnd-get-state-cons-for-frame frame-or-window)
+ (copy-sequence x-dnd-empty-state)))
(defun x-dnd-maybe-call-test-function (window action)
"Call `x-dnd-test-function' if something has changed.
(handler (cdr (assoc (cdr action-type) x-dnd-types-alist))))
;; Ignore action-type if we have no handler.
(setq current-state
- (x-dnd-save-state window
+ (x-dnd-save-state window
action
(when handler action-type)))))))
(let ((current-state (x-dnd-get-state-for-frame window)))
(cons (aref current-state 5)
(aref current-state 4))))
-(defun x-dnd-save-state (window action action-type &optional types)
+(defun x-dnd-save-state (window action action-type &optional types extra-data)
"Save the state of the current drag and drop.
WINDOW is the window the mouse is over. ACTION is the action suggested
by the source. ACTION-TYPE is the result of calling `x-dnd-test-function'.
-If given, TYPES are the types for the drop data that the source supports."
+If given, TYPES are the types for the drop data that the source supports.
+EXTRA-DATA is data needed for a specific protocol."
(let ((current-state (x-dnd-get-state-for-frame window)))
(aset current-state 5 (car action-type))
(aset current-state 4 (cdr action-type))
(aset current-state 3 action)
- (if types (aset current-state 2 types))
+ (when types (aset current-state 2 types))
+ (when extra-data (aset current-state 6 extra-data))
(aset current-state 1 window)
(aset current-state 0 (if (and (windowp window)
(window-live-p window))
(setcdr (x-dnd-get-state-cons-for-frame window) current-state)))
-(defun x-dnd-test-and-save-state (window action types)
- "Test if drop shall be accepted, and save the state for future reference.
-ACTION is the suggested action by the source.
-TYPES is a list of types the source supports."
- (x-dnd-save-state window
- action
- (x-dnd-maybe-call-test-function window action)
- types))
-
-(defun x-dnd-handle-one-url (window action arg)
- "Handle one dropped url by calling the appropriate handler.
-The handler is first localted by looking at `x-dnd-protocol-alist'.
-If no match is found here, and the value of `browse-url-browser-function'
-is a pair of (REGEXP . FUNCTION), those regexps are tried for a match.
-If no match is found, just call `x-dnd-insert-text\e,A4\e(B.
-WINDOW is where the drop happend, ACTION is the action for the drop,
-ARG is the URL that has been dropped.
-Returns ACTION."
- (require 'browse-url)
- (let* ((uri (replace-regexp-in-string
- "%[A-Z0-9][A-Z0-9]"
- (lambda (arg)
- (format "%c" (string-to-number (substring arg 1) 16)))
- arg))
- ret)
- (or
- (catch 'done
- (dolist (bf x-dnd-protocol-alist)
- (when (string-match (car bf) uri)
- (setq ret (funcall (cdr bf) uri action))
- (throw 'done t)))
- nil)
- (when (not (functionp browse-url-browser-function))
- (catch 'done
- (dolist (bf browse-url-browser-function)
- (when (string-match (car bf) uri)
- (setq ret 'private)
- (funcall (cdr bf) uri action)
- (throw 'done t)))
- nil))
- (x-dnd-insert-text window action uri))
- ret))
-
-
-(defun x-dnd-get-local-file-uri (uri)
- "Return an uri converted to file:/// syntax if uri is a local file.
-Return nil if URI is not a local file."
-
- ;; The hostname may be our hostname, in that case, convert to a local
- ;; file. Otherwise return nil. TODO: How about an IP-address as hostname?
- (let ((hostname (when (string-match "^file://\\([^/]*\\)" uri)
- (downcase (match-string 1 uri))))
- (system-name-no-dot
- (downcase (if (string-match "^[^\\.]+" system-name)
- (match-string 0 system-name)
- system-name))))
- (when (and hostname
- (or (string-equal "localhost" hostname)
- (string-equal (downcase system-name) hostname)
- (string-equal system-name-no-dot hostname)))
- (concat "file://" (substring uri (+ 7 (length hostname)))))))
-
-(defun x-dnd-get-local-file-name (uri &optional must-exist)
- "Return file name converted from file:/// or file: syntax.
-URI is the uri for the file. If MUST-EXIST is given and non-nil,
-only return non-nil if the file exists.
-Return nil if URI is not a local file."
- (let ((f (cond ((string-match "^file:///" uri) ; XDND format.
- (substring uri (1- (match-end 0))))
- ((string-match "^file:" uri) ; Old KDE, Motif, Sun
- (substring uri (match-end 0)))
- nil)))
- (when (and f must-exist)
- (let* ((decoded-f (decode-coding-string
- f
- (or file-name-coding-system
- default-file-name-coding-system)))
- (try-f (if (file-readable-p decoded-f) decoded-f f)))
- (when (file-readable-p try-f) try-f)))))
-
-
-(defun x-dnd-open-local-file (uri action)
- "Open a local file.
-The file is opened in the current window, or a new window if
-`x-dnd-open-file-other-window' is set. URI is the url for the file,
-and must have the format file:file-name or file:///file-name.
-The last / in file:/// is part of the file name. ACTION is ignored."
-
- (let* ((f (x-dnd-get-local-file-name uri t)))
- (when f
- (if (file-readable-p f)
- (progn
- (if x-dnd-open-file-other-window
- (find-file-other-window f)
- (find-file f))
- 'private)
- (error "Can not read %s (%s)" f uri)))))
-
-(defun x-dnd-open-file (uri action)
- "Open a local or remote file.
-The file is opened in the current window, or a new window if
-`x-dnd-open-file-other-window' is set. URI is the url for the file,
-and must have the format file://hostname/file-name. ACTION is ignored.
-The last / in file://hostname/ is part of the file name."
-
- ;; The hostname may be our hostname, in that case, convert to a local
- ;; file. Otherwise return nil.
- (let ((local-file (x-dnd-get-local-file-uri uri)))
- (when local-file (x-dnd-open-local-file local-file action))))
-
-
(defun x-dnd-handle-moz-url (window action data)
"Handle one item of type text/x-moz-url.
WINDOW is the window where the drop happened. ACTION is ignored.
DATA is the moz-url, which is formatted as two strings separated by \r\n.
The first string is the URL, the second string is the title of that URL.
DATA is encoded in utf-16. Decode the URL and call `x-dnd-handle-uri-list'."
- (let* ((string (decode-coding-string data 'utf-16le)) ;; ALWAYS LE???
+ ;; Mozilla and applications based on it (Galeon for example) uses
+ ;; text/unicode, but it is impossible to tell if it is le or be. Use what
+ ;; the machine Emacs runs on use. This looses if dropping between machines
+ ;; with different endian, but it is the best we can do.
+ (let* ((coding (if (eq (byteorder) ?B) 'utf-16be 'utf-16le))
+ (string (decode-coding-string data coding))
(strings (split-string string "[\r\n]" t))
;; Can one drop more than one moz-url ?? Assume not.
(url (car strings))
(defun x-dnd-insert-utf8-text (window action text)
"Decode the UTF-8 text and insert it at point.
TEXT is the text as a string, WINDOW is the window where the drop happened."
- (x-dnd-insert-text window action (decode-coding-string text 'utf-8)))
+ (dnd-insert-text window action (decode-coding-string text 'utf-8)))
(defun x-dnd-insert-utf16-text (window action text)
"Decode the UTF-16 text and insert it at point.
TEXT is the text as a string, WINDOW is the window where the drop happened."
- (x-dnd-insert-text window action (decode-coding-string text 'utf-16le)))
+ ;; See comment in x-dnd-handle-moz-url about coding.
+ (let ((coding (if (eq (byteorder) ?B) 'utf-16be 'utf-16le)))
+ (dnd-insert-text window action (decode-coding-string text coding))))
-(defun x-dnd-insert-text (window action text)
- "Insert text at point or push to the kill ring if buffer is read only.
+(defun x-dnd-insert-ctext (window action text)
+ "Decode the compound text and insert it at point.
TEXT is the text as a string, WINDOW is the window where the drop happened."
- (if (or buffer-read-only
- (not (windowp window)))
- (progn
- (kill-new text)
- (message
- (substitute-command-keys
- "The dropped text can be accessed with \\[yank]")))
- (insert text))
- action)
+ (dnd-insert-text window action
+ (decode-coding-string text
+ 'compound-text-with-extensions)))
(defun x-dnd-handle-uri-list (window action string)
- "Split an uri-list into separate URIs and call `x-dnd-handle-one-url'.
+ "Split an uri-list into separate URIs and call `dnd-handle-one-url'.
WINDOW is the window where the drop happened.
STRING is the uri-list as a string. The URIs are separated by \r\n."
(let ((uri-list (split-string string "[\0\r\n]" t))
retval)
(dolist (bf uri-list)
;; If one URL is handeled, treat as if the whole drop succeeded.
- (let ((did-action (x-dnd-handle-one-url window action bf)))
+ (let ((did-action (dnd-handle-one-url window action bf)))
+ (when did-action (setq retval did-action))))
+ retval))
+
+(defun x-dnd-handle-file-name (window action string)
+ "Prepend file:// to file names and call `dnd-handle-one-url'.
+WINDOW is the window where the drop happened.
+STRING is the file names as a string, separated by nulls."
+ (let ((uri-list (split-string string "[\0\r\n]" t))
+ retval)
+ (dolist (bf uri-list)
+ ;; If one URL is handeled, treat as if the whole drop succeeded.
+ (let* ((file-uri (concat "file://" bf))
+ (did-action (dnd-handle-one-url window action file-uri)))
(when did-action (setq retval did-action))))
retval))
(if (and (windowp w) (window-live-p w))
;; If dropping in a window, open files in that window rather
;; than in a new widow.
- (let ((x-dnd-open-file-other-window nil))
+ (let ((dnd-open-file-other-window nil))
(goto-char (posn-point (event-start event)))
(funcall handler window action data))
- (let ((x-dnd-open-file-other-window t)) ;; Dropping on non-window.
+ (let ((dnd-open-file-other-window t)) ;; Dropping on non-window.
(select-frame frame)
(funcall handler window action data))))))
(defun x-dnd-handle-drag-n-drop-event (event)
"Receive drag and drop events (X client messages).
-Currently XDND and old KDE 1.x protocols are recognized.
-TODO: Add Motif and OpenWindows."
+Currently XDND, Motif and old KDE 1.x protocols are recognized."
(interactive "e")
(let* ((client-message (car (cdr (cdr event))))
(window (posn-window (event-start event)))
(format (aref client-message 2))
(data (aref client-message 3)))
- (cond ((equal "DndProtocol" message-atom) ;; Old KDE 1.x.
+ (cond ((equal "DndProtocol" message-atom) ; Old KDE 1.x.
(x-dnd-handle-old-kde event frame window message-atom format data))
- ((and (> (length message-atom) 4) ;; XDND protocol.
+ ((equal "_MOTIF_DRAG_AND_DROP_MESSAGE" message-atom) ; Motif
+ (x-dnd-handle-motif event frame window message-atom format data))
+
+ ((and (> (length message-atom) 4) ; XDND protocol.
(equal "Xdnd" (substring message-atom 0 4)))
- (x-dnd-handle-xdnd event frame window message-atom format data))
+ (x-dnd-handle-xdnd event frame window message-atom format data)))))
- (t (error "Unknown DND atom: %s" message-atom)))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;; Old KDE protocol. Only dropping of files.
"Mapping from XDND action types to lisp symbols.")
(defun x-dnd-init-xdnd-for-frame (frame)
- "Set the XdndAware for FRAME to indicate that we do XDND."
+ "Set the XdndAware property for FRAME to indicate that we do XDND."
(x-change-window-property "XdndAware"
'(5) ;; The version of XDND we support.
frame "ATOM" 32 t))
WINDOW is the window within FRAME where the mouse is now.
FORMAT is 32 (not used). MESSAGE is the data part of an XClientMessageEvent."
(cond ((equal "XdndEnter" message)
- (let ((version (ash (car (aref data 1)) -8))
- (more-than-3 (cdr (aref data 1)))
- (dnd-source (aref data 0)))
- (x-dnd-save-state
- window nil nil
- (if (> more-than-3 0)
- (x-window-property "XdndTypeList"
- frame "AnyPropertyType"
- dnd-source nil t)
- (vector (x-get-atom-name (aref data 2))
- (x-get-atom-name (aref data 3))
- (x-get-atom-name (aref data 4)))))))
+ (let* ((flags (aref data 1))
+ (version (and (consp flags) (ash (car flags) -8)))
+ (more-than-3 (and (consp flags) (cdr flags)))
+ (dnd-source (aref data 0)))
+ (if version ;; If flags is bad, version will be nil.
+ (x-dnd-save-state
+ window nil nil
+ (if (> more-than-3 0)
+ (x-window-property "XdndTypeList"
+ frame "AnyPropertyType"
+ dnd-source nil t)
+ (vector (x-get-atom-name (aref data 2))
+ (x-get-atom-name (aref data 3))
+ (x-get-atom-name (aref data 4))))))))
((equal "XdndPosition" message)
(let* ((x (car (aref data 2)))
(frame-parameter frame 'outer-window-id))
accept ;; 1 = Accept, 0 = reject.
(x-dnd-get-drop-x-y frame window)
- (x-dnd-get-drop-width-height
+ (x-dnd-get-drop-width-height
frame window (eq accept 1))
(or reply-action 0)
)))
(if (windowp window) (select-window window))
(let* ((dnd-source (aref data 0))
(value (and (x-dnd-current-type window)
- ;; Get selection with target DELETE if move.
(x-get-selection-internal
'XdndSelection
(intern (x-dnd-current-type window)))))
(setq action (if value
(condition-case info
- (x-dnd-drop-data event frame window value
+ (x-dnd-drop-data event frame window value
(x-dnd-current-type window))
- (error
+ (error
(message "Error: %s" info)
nil))))
(t (error "Unknown XDND message %s %s" message data))))
+;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
+;;; Motif protocol.
+
+(defun x-dnd-init-motif-for-frame (frame)
+ "Set _MOTIF_DRAG_RECEIVER_INFO for FRAME to indicate that we do Motif DND."
+ (x-change-window-property "_MOTIF_DRAG_RECEIVER_INFO"
+ (list
+ (byteorder)
+ 0 ; The Motif DND version.
+ 5 ; We want drag dynamic.
+ 0 0 0 0 0 0 0
+ 0 0 0 0 0 0) ; Property must be 16 bytes.
+ frame "_MOTIF_DRAG_RECEIVER_INFO" 8 t))
+
+(defun x-dnd-get-motif-value (data offset size byteorder)
+ (cond ((eq size 2)
+ (if (eq byteorder ?l)
+ (+ (ash (aref data (1+ offset)) 8)
+ (aref data offset))
+ (+ (ash (aref data offset) 8)
+ (aref data (1+ offset)))))
+
+ ((eq size 4)
+ (if (eq byteorder ?l)
+ (cons (+ (ash (aref data (+ 3 offset)) 8)
+ (aref data (+ 2 offset)))
+ (+ (ash (aref data (1+ offset)) 8)
+ (aref data offset)))
+ (cons (+ (ash (aref data offset) 8)
+ (aref data (1+ offset)))
+ (+ (ash (aref data (+ 2 offset)) 8)
+ (aref data (+ 3 offset))))))))
+
+(defun x-dnd-motif-value-to-list (value size byteorder)
+ (let ((bytes (cond ((eq size 2)
+ (list (logand (lsh value -8) ?\xff)
+ (logand value ?\xff)))
+
+ ((eq size 4)
+ (if (consp value)
+ (list (logand (lsh (car value) -8) ?\xff)
+ (logand (car value) ?\xff)
+ (logand (lsh (cdr value) -8) ?\xff)
+ (logand (cdr value) ?\xff))
+ (list (logand (lsh value -24) ?\xff)
+ (logand (lsh value -16) ?\xff)
+ (logand (lsh value -8) ?\xff)
+ (logand value ?\xff)))))))
+ (if (eq byteorder ?l)
+ (reverse bytes)
+ bytes)))
+
+
+(defvar x-dnd-motif-message-types
+ '((0 . XmTOP_LEVEL_ENTER)
+ (1 . XmTOP_LEVEL_LEAVE)
+ (2 . XmDRAG_MOTION)
+ (3 . XmDROP_SITE_ENTER)
+ (4 . XmDROP_SITE_LEAVE)
+ (5 . XmDROP_START)
+ (6 . XmDROP_FINISH)
+ (7 . XmDRAG_DROP_FINISH)
+ (8 . XmOPERATION_CHANGED))
+ "Mapping from numbers to Motif DND message types.")
+
+(defvar x-dnd-motif-to-action
+ '((1 . move)
+ (2 . copy)
+ (3 . link) ; Both 3 and 4 has been seen as link.
+ (4 . link)
+ (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)))
+ (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)
+ 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)
+ 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))
+ (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)))))
+
+
+;;;
+
(provide 'x-dnd)
-;;; arch-tag: ???
+;;; arch-tag: b621fb7e-50da-4323-850b-5fc71ae64621
;;; x-dnd.el ends here
HCoop / bpt / emacs.git / blobdiff