mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-12-11 09:20:51 +00:00
cfecdf09a0
* lisp/select.el (x-get-selection-internal, x-own-selection-internal) (x-disown-selection-internal): * lisp/x-dnd.el (x-get-selection-internal): Update declarations.
773 lines
27 KiB
EmacsLisp
773 lines
27 KiB
EmacsLisp
;;; x-dnd.el --- drag and drop support for X -*- coding: utf-8 -*-
|
|
|
|
;; Copyright (C) 2004-2012 Free Software Foundation, Inc.
|
|
|
|
;; Author: Jan Djärv <jan.h.d@swipnet.se>
|
|
;; Maintainer: FSF
|
|
;; Keywords: window, drag, drop
|
|
;; Package: emacs
|
|
|
|
;; This file is part of GNU Emacs.
|
|
|
|
;; GNU Emacs is free software: you can redistribute it and/or modify
|
|
;; it under the terms of the GNU General Public License as published by
|
|
;; the Free Software Foundation, either version 3 of the License, or
|
|
;; (at your option) any later version.
|
|
|
|
;; GNU Emacs is distributed in the hope that it will be useful,
|
|
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;; GNU General Public License for more details.
|
|
|
|
;; You should have received a copy of the GNU General Public License
|
|
;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
;;; Commentary:
|
|
|
|
;; This file provides the drop part only. Currently supported protocols
|
|
;; are XDND, Motif and the old KDE 1.x protocol.
|
|
|
|
;;; Code:
|
|
|
|
(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.
|
|
WINDOW is where the mouse is when the function is called. WINDOW may be a
|
|
frame if the mouse isn't over a real window (i.e. menu bar, tool bar or
|
|
scroll bar). ACTION is the suggested action from the drag and drop source,
|
|
one of the symbols move, copy, link or ask. TYPES is a list of available
|
|
types for the drop.
|
|
|
|
The function shall return nil to reject the drop or a cons with two values,
|
|
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-types-alist
|
|
`(
|
|
(,(purecopy "text/uri-list") . x-dnd-handle-uri-list)
|
|
(,(purecopy "text/x-moz-url") . x-dnd-handle-moz-url)
|
|
(,(purecopy "_NETSCAPE_URL") . x-dnd-handle-uri-list)
|
|
(,(purecopy "FILE_NAME") . x-dnd-handle-file-name)
|
|
(,(purecopy "UTF8_STRING") . x-dnd-insert-utf8-text)
|
|
(,(purecopy "text/plain;charset=UTF-8") . x-dnd-insert-utf8-text)
|
|
(,(purecopy "text/plain;charset=utf-8") . x-dnd-insert-utf8-text)
|
|
(,(purecopy "text/unicode") . x-dnd-insert-utf16-text)
|
|
(,(purecopy "text/plain") . dnd-insert-text)
|
|
(,(purecopy "COMPOUND_TEXT") . x-dnd-insert-ctext)
|
|
(,(purecopy "STRING") . dnd-insert-text)
|
|
(,(purecopy "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,
|
|
the drop is rejected. The function takes three arguments, WINDOW, ACTION
|
|
and DATA. WINDOW is where the drop occurred, ACTION is the action for
|
|
this drop (copy, move, link, private or ask) as determined by a previous
|
|
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-known-types
|
|
(mapcar 'purecopy
|
|
'("text/uri-list"
|
|
"text/x-moz-url"
|
|
"_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."
|
|
: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:
|
|
Last buffer drag was in,
|
|
last window drag was in,
|
|
types available for drop,
|
|
the action suggested by the source,
|
|
the type 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 nil])
|
|
|
|
(declare-function x-register-dnd-atom "xselect.c")
|
|
|
|
(defun x-dnd-init-frame (&optional frame)
|
|
"Setup drag and drop for FRAME (i.e. create appropriate properties)."
|
|
(when (eq 'x (window-system frame))
|
|
(x-register-dnd-atom "DndProtocol" frame)
|
|
(x-register-dnd-atom "_MOTIF_DRAG_AND_DROP_MESSAGE" frame)
|
|
(x-register-dnd-atom "XdndEnter" frame)
|
|
(x-register-dnd-atom "XdndPosition" frame)
|
|
(x-register-dnd-atom "XdndLeave" frame)
|
|
(x-register-dnd-atom "XdndDrop" 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."
|
|
(let* ((frame (if (framep frame-or-window) frame-or-window
|
|
(window-frame frame-or-window)))
|
|
(display (frame-parameter frame 'display)))
|
|
(if (not (assoc display 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)
|
|
"Return the state in `x-dnd-current-state' for a frame or window."
|
|
(cdr (x-dnd-get-state-cons-for-frame frame-or-window)))
|
|
|
|
(defun x-dnd-default-test-function (_window _action types)
|
|
"The default test function for drag and drop.
|
|
WINDOW is where the mouse is when this function is called. It may be
|
|
a frame if the mouse is over the menu bar, scroll bar or tool bar.
|
|
ACTION is the suggested action from the source, and TYPES are the
|
|
types the drop data can have. This function only accepts drops with
|
|
types in `x-dnd-known-types'. It always returns the action private."
|
|
(let ((type (x-dnd-choose-type types)))
|
|
(when type (cons 'private type))))
|
|
|
|
|
|
(defun x-dnd-current-type (frame-or-window)
|
|
"Return the type we want the DND data to be in for the current drop.
|
|
FRAME-OR-WINDOW is the frame or window that the mouse is over."
|
|
(aref (x-dnd-get-state-for-frame frame-or-window) 4))
|
|
|
|
(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)
|
|
(copy-sequence x-dnd-empty-state)))
|
|
|
|
(defun x-dnd-maybe-call-test-function (window action)
|
|
"Call `x-dnd-test-function' if something has changed.
|
|
WINDOW is the window the mouse is over. ACTION is the suggested
|
|
action from the source. If nothing has changed, return the last
|
|
action and type we got from `x-dnd-test-function'."
|
|
(let ((buffer (when (window-live-p window)
|
|
(window-buffer window)))
|
|
(current-state (x-dnd-get-state-for-frame window)))
|
|
(unless (and (equal buffer (aref current-state 0))
|
|
(equal window (aref current-state 1))
|
|
(equal action (aref current-state 3)))
|
|
(save-current-buffer
|
|
(when buffer (set-buffer buffer))
|
|
(let* ((action-type (funcall x-dnd-test-function
|
|
window
|
|
action
|
|
(aref current-state 2)))
|
|
(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
|
|
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 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.
|
|
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)
|
|
(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 (and (window-live-p window) (window-buffer window)))
|
|
(setcdr (x-dnd-get-state-cons-for-frame window) current-state)))
|
|
|
|
|
|
(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'."
|
|
;; 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 loses 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)))
|
|
(x-dnd-handle-uri-list window action url)))
|
|
|
|
(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."
|
|
(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."
|
|
;; 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-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."
|
|
(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 `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 handled, treat as if the whole drop succeeded.
|
|
(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)
|
|
"Convert file names to URLs 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))
|
|
(coding (and (default-value 'enable-multibyte-characters)
|
|
(or file-name-coding-system
|
|
default-file-name-coding-system)))
|
|
retval)
|
|
(dolist (bf uri-list)
|
|
;; If one URL is handled, treat as if the whole drop succeeded.
|
|
(if coding (setq bf (encode-coding-string bf coding)))
|
|
(let* ((file-uri (concat "file://"
|
|
(mapconcat 'url-hexify-string
|
|
(split-string bf "/") "/")))
|
|
(did-action (dnd-handle-one-url window action file-uri)))
|
|
(when did-action (setq retval did-action))))
|
|
retval))
|
|
|
|
|
|
(defun x-dnd-choose-type (types &optional known-types)
|
|
"Choose which type we want to receive for the drop.
|
|
TYPES are the types the source of the drop offers, a vector of type names
|
|
as strings or symbols. Select among the types in `x-dnd-known-types' or
|
|
KNOWN-TYPES if given, and return that type name.
|
|
If no suitable type is found, return nil."
|
|
(let* ((known-list (or known-types x-dnd-known-types))
|
|
(first-known-type (car known-list))
|
|
(types-array types)
|
|
(found (when first-known-type
|
|
(catch 'done
|
|
(dotimes (i (length types-array))
|
|
(let* ((type (aref types-array i))
|
|
(typename (if (symbolp type)
|
|
(symbol-name type) type)))
|
|
(when (equal first-known-type typename)
|
|
(throw 'done first-known-type))))
|
|
nil))))
|
|
|
|
(if (and (not found) (cdr known-list))
|
|
(x-dnd-choose-type types (cdr known-list))
|
|
found)))
|
|
|
|
(defun x-dnd-drop-data (event frame window data type)
|
|
"Drop one data item onto a frame.
|
|
EVENT is the client message for the drop, FRAME is the frame the drop
|
|
occurred on. WINDOW is the window of FRAME where the drop happened.
|
|
DATA is the data received from the source, and type is the type for DATA,
|
|
see `x-dnd-types-alist').
|
|
|
|
Returns the action used (move, copy, link, private) if drop was successful,
|
|
nil if not."
|
|
(let* ((type-info (assoc type x-dnd-types-alist))
|
|
(handler (cdr type-info))
|
|
(state (x-dnd-get-state-for-frame frame))
|
|
(action (aref state 5))
|
|
(w (posn-window (event-start event))))
|
|
(when handler
|
|
(if (and (window-live-p w)
|
|
(not (window-minibuffer-p w))
|
|
(not (window-dedicated-p w)))
|
|
;; If dropping in an ordinary window which we could use,
|
|
;; let dnd-open-file-other-window specify what to do.
|
|
(progn
|
|
(when (not mouse-yank-at-point)
|
|
(goto-char (posn-point (event-start event))))
|
|
(funcall handler window action data))
|
|
;; If we can't display the file here,
|
|
;; make a new window for it.
|
|
(let ((dnd-open-file-other-window t))
|
|
(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, Motif and old KDE 1.x protocols are recognized."
|
|
(interactive "e")
|
|
(let* ((client-message (car (cdr (cdr event))))
|
|
(window (posn-window (event-start event)))
|
|
(message-atom (aref client-message 0))
|
|
(frame (aref client-message 1))
|
|
(format (aref client-message 2))
|
|
(data (aref client-message 3)))
|
|
|
|
(cond ((equal "DndProtocol" message-atom) ; Old KDE 1.x.
|
|
(x-dnd-handle-old-kde event frame window message-atom format data))
|
|
|
|
((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)))))
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;;; Old KDE protocol. Only dropping of files.
|
|
|
|
(declare-function x-window-property "xfns.c"
|
|
(prop &optional frame type source delete-p vector-ret-p))
|
|
|
|
(defun x-dnd-handle-old-kde (_event frame window _message _format _data)
|
|
"Open the files in a KDE 1.x drop."
|
|
(let ((values (x-window-property "DndSelection" frame nil 0 t)))
|
|
(x-dnd-handle-uri-list window 'private
|
|
(replace-regexp-in-string "\0$" "" values))))
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
|
|
|
|
|
|
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
|
|
;;; XDND protocol.
|
|
|
|
(defconst x-dnd-xdnd-to-action
|
|
'(("XdndActionPrivate" . private)
|
|
("XdndActionCopy" . copy)
|
|
("XdndActionMove" . move)
|
|
("XdndActionLink" . link)
|
|
("XdndActionAsk" . ask))
|
|
"Mapping from XDND action types to lisp symbols.")
|
|
|
|
(declare-function x-change-window-property "xfns.c"
|
|
(prop value &optional frame type format outer-P))
|
|
|
|
(defun x-dnd-init-xdnd-for-frame (frame)
|
|
"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))
|
|
|
|
(defun x-dnd-get-drop-width-height (frame w accept)
|
|
"Return the width/height to be sent in a XDndStatus message.
|
|
FRAME is the frame and W is the window where the drop happened.
|
|
If ACCEPT is nil return 0 (empty rectangle),
|
|
otherwise if W is a window, return its width/height,
|
|
otherwise return the frame width/height."
|
|
(if accept
|
|
(if (windowp w) ;; w is not a window if dropping on the menu bar,
|
|
;; scroll bar or tool bar.
|
|
(let ((edges (window-inside-pixel-edges w)))
|
|
(cons
|
|
(- (nth 2 edges) (nth 0 edges)) ;; right - left
|
|
(- (nth 3 edges) (nth 1 edges)))) ;; bottom - top
|
|
(cons (frame-pixel-width frame)
|
|
(frame-pixel-height frame)))
|
|
0))
|
|
|
|
(defun x-dnd-get-drop-x-y (frame w)
|
|
"Return the x/y coordinates to be sent in a XDndStatus message.
|
|
Coordinates are required to be absolute.
|
|
FRAME is the frame and W is the window where the drop happened.
|
|
If W is a window, return its absolute coordinates,
|
|
otherwise return the frame coordinates."
|
|
(let* ((frame-left (frame-parameter frame 'left))
|
|
;; If the frame is outside the display, frame-left looks like
|
|
;; '(0 -16). Extract the -16.
|
|
(frame-real-left (if (consp frame-left) (car (cdr frame-left))
|
|
frame-left))
|
|
(frame-top (frame-parameter frame 'top))
|
|
(frame-real-top (if (consp frame-top) (car (cdr frame-top))
|
|
frame-top)))
|
|
(if (windowp w)
|
|
(let ((edges (window-inside-pixel-edges w)))
|
|
(cons
|
|
(+ frame-real-left (nth 0 edges))
|
|
(+ frame-real-top (nth 1 edges))))
|
|
(cons frame-real-left frame-real-top))))
|
|
|
|
(declare-function x-get-atom-name "xselect.c" (value &optional frame))
|
|
(declare-function x-send-client-message "xselect.c"
|
|
(display dest from message-type format values))
|
|
(declare-function x-get-selection-internal "xselect.c"
|
|
(selection-symbol target-type &optional time-stamp terminal))
|
|
|
|
(defun x-dnd-version-from-flags (flags)
|
|
"Return the version byte from the 32 bit FLAGS in an XDndEnter message"
|
|
(if (consp flags) ;; Long as cons
|
|
(ash (car flags) -8)
|
|
(ash flags -24))) ;; Ordinary number
|
|
|
|
(defun x-dnd-more-than-3-from-flags (flags)
|
|
"Return the nmore-than3 bit from the 32 bit FLAGS in an XDndEnter message"
|
|
(if (consp flags)
|
|
(logand (cdr flags) 1)
|
|
(logand flags 1)))
|
|
|
|
(defun x-dnd-handle-xdnd (event frame window message _format data)
|
|
"Receive one XDND event (client message) and send the appropriate reply.
|
|
EVENT is the client message. FRAME is where the mouse is now.
|
|
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* ((flags (aref data 1))
|
|
(version (x-dnd-version-from-flags flags))
|
|
(more-than-3 (x-dnd-more-than-3-from-flags flags))
|
|
(dnd-source (aref data 0)))
|
|
(message "%s %s" version more-than-3)
|
|
(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* ((action (x-get-atom-name (aref data 4)))
|
|
(dnd-source (aref data 0))
|
|
(action-type (x-dnd-maybe-call-test-function
|
|
window
|
|
(cdr (assoc action x-dnd-xdnd-to-action))))
|
|
(reply-action (car (rassoc (car action-type)
|
|
x-dnd-xdnd-to-action)))
|
|
(accept ;; 1 = accept, 0 = reject
|
|
(if (and reply-action action-type) 1 0))
|
|
(list-to-send
|
|
(list (string-to-number
|
|
(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
|
|
frame window (eq accept 1))
|
|
(or reply-action 0)
|
|
)))
|
|
(x-send-client-message
|
|
frame dnd-source frame "XdndStatus" 32 list-to-send)
|
|
))
|
|
|
|
((equal "XdndLeave" message)
|
|
(x-dnd-forget-drop window))
|
|
|
|
((equal "XdndDrop" message)
|
|
(if (windowp window) (select-window window))
|
|
(let* ((dnd-source (aref data 0))
|
|
(value (and (x-dnd-current-type window)
|
|
(x-get-selection-internal
|
|
'XdndSelection
|
|
(intern (x-dnd-current-type window)))))
|
|
success action)
|
|
|
|
(setq action (if value
|
|
(condition-case info
|
|
(x-dnd-drop-data event frame window value
|
|
(x-dnd-current-type window))
|
|
(error
|
|
(message "Error: %s" info)
|
|
nil))))
|
|
|
|
(setq success (if action 1 0))
|
|
|
|
(x-send-client-message
|
|
frame dnd-source frame "XdndFinished" 32
|
|
(list (string-to-number (frame-parameter frame 'outer-window-id))
|
|
success ;; 1 = Success, 0 = Error
|
|
(if success "XdndActionPrivate" 0)
|
|
))
|
|
(x-dnd-forget-drop window)))
|
|
|
|
(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)
|
|
|
|
;;; x-dnd.el ends here
|