mirror of
https://git.savannah.gnu.org/git/emacs.git
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1dd3c2d9b2
* lisp/select.el: Don't perform clipboard-manager saving in hooks; leave the hooks empty. * src/emacs.c (Fkill_emacs): Call x_clipboard_manager_save_all. * src/frame.c (delete_frame): Call x_clipboard_manager_save_frame. * src/xselect.c (x_clipboard_manager_save_frame) (x_clipboard_manager_save_all): New functions. (Fx_clipboard_manager_save): Lisp function deleted. * src/xterm.h: Update prototype.
401 lines
14 KiB
EmacsLisp
401 lines
14 KiB
EmacsLisp
;;; select.el --- lisp portion of standard selection support
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;; Copyright (C) 1993-1994, 2001-2011 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: internal
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Based partially on earlier release by Lucid.
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;;; Code:
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(defcustom selection-coding-system nil
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"Coding system for communicating with other programs.
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For MS-Windows and MS-DOS:
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When sending or receiving text via selection and clipboard, the text
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is encoded or decoded by this coding system. The default value is
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the current system default encoding on 9x/Me, `utf-16le-dos'
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\(Unicode) on NT/W2K/XP, and `iso-latin-1-dos' on MS-DOS.
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For X Windows:
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When sending text via selection and clipboard, if the target
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data-type matches with the type of this coding system, it is used
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for encoding the text. Otherwise (including the case that this
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variable is nil), a proper coding system is used as below:
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data-type coding system
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--------- -------------
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UTF8_STRING utf-8
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COMPOUND_TEXT compound-text-with-extensions
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STRING iso-latin-1
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C_STRING no-conversion
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When receiving text, if this coding system is non-nil, it is used
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for decoding regardless of the data-type. If this is nil, a
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proper coding system is used according to the data-type as above.
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See also the documentation of the variable `x-select-request-type' how
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to control which data-type to request for receiving text.
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The default value is nil."
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:type 'coding-system
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:group 'mule
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;; Default was compound-text-with-extensions in 22.x (pre-unicode).
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:version "23.1"
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:set (lambda (symbol value)
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(set-selection-coding-system value)
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(set symbol value)))
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(defvar next-selection-coding-system nil
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"Coding system for the next communication with other programs.
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Usually, `selection-coding-system' is used for communicating with
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other programs (X Windows clients or MS Windows programs). But, if this
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variable is set, it is used for the next communication only.
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After the communication, this variable is set to nil.")
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(declare-function x-get-selection-internal "xselect.c"
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(selection-symbol target-type &optional time-stamp))
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;; Only declared obsolete in 23.3.
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(define-obsolete-function-alias 'x-selection 'x-get-selection "at least 19.34")
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(defun x-get-selection (&optional type data-type)
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"Return the value of an X Windows selection.
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The argument TYPE (default `PRIMARY') says which selection,
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and the argument DATA-TYPE (default `STRING') says
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how to convert the data.
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TYPE may be any symbol \(but nil stands for `PRIMARY'). However,
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only a few symbols are commonly used. They conventionally have
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all upper-case names. The most often used ones, in addition to
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`PRIMARY', are `SECONDARY' and `CLIPBOARD'.
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DATA-TYPE is usually `STRING', but can also be one of the symbols
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in `selection-converter-alist', which see."
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(let ((data (x-get-selection-internal (or type 'PRIMARY)
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(or data-type 'STRING)))
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coding)
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(when (and (stringp data)
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(setq data-type (get-text-property 0 'foreign-selection data)))
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(setq coding (or next-selection-coding-system
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selection-coding-system
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(cond ((eq data-type 'UTF8_STRING)
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'utf-8)
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((eq data-type 'COMPOUND_TEXT)
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'compound-text-with-extensions)
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((eq data-type 'C_STRING)
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nil)
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((eq data-type 'STRING)
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'iso-8859-1)
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(t
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(error "Unknow selection data type: %S" type))))
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data (if coding (decode-coding-string data coding)
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(string-to-multibyte data)))
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(setq next-selection-coding-system nil)
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(put-text-property 0 (length data) 'foreign-selection data-type data))
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data))
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(defun x-get-clipboard ()
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"Return text pasted to the clipboard."
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(x-get-selection-internal 'CLIPBOARD 'STRING))
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(declare-function x-own-selection-internal "xselect.c"
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(selection-name selection-value))
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(declare-function x-disown-selection-internal "xselect.c"
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(selection &optional time))
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(defun x-set-selection (type data)
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"Make an X selection of type TYPE and value DATA.
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The argument TYPE (nil means `PRIMARY') says which selection, and
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DATA specifies the contents. TYPE must be a symbol. \(It can also
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be a string, which stands for the symbol with that name, but this
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is considered obsolete.) DATA may be a string, a symbol, an
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integer (or a cons of two integers or list of two integers).
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The selection may also be a cons of two markers pointing to the same buffer,
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or an overlay. In these cases, the selection is considered to be the text
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between the markers *at whatever time the selection is examined*.
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Thus, editing done in the buffer after you specify the selection
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can alter the effective value of the selection.
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The data may also be a vector of valid non-vector selection values.
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The return value is DATA.
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Interactively, this command sets the primary selection. Without
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prefix argument, it reads the selection in the minibuffer. With
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prefix argument, it uses the text of the region as the selection value.
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Note that on MS-Windows, primary and secondary selections set by Emacs
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are not available to other programs."
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(interactive (if (not current-prefix-arg)
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(list 'PRIMARY (read-string "Set text for pasting: "))
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(list 'PRIMARY (buffer-substring (region-beginning) (region-end)))))
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(if (stringp type) (setq type (intern type)))
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(or (x-valid-simple-selection-p data)
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(and (vectorp data)
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(let ((valid t)
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(i (1- (length data))))
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(while (>= i 0)
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(or (x-valid-simple-selection-p (aref data i))
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(setq valid nil))
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(setq i (1- i)))
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valid))
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(signal 'error (list "invalid selection" data)))
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(or type (setq type 'PRIMARY))
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(if data
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(x-own-selection-internal type data)
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(x-disown-selection-internal type))
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data)
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(defun x-valid-simple-selection-p (data)
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(or (bufferp data)
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(and (consp data)
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(markerp (car data))
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(markerp (cdr data))
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(marker-buffer (car data))
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(buffer-name (marker-buffer (car data)))
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(eq (marker-buffer (car data))
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(marker-buffer (cdr data))))
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(stringp data)
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(and (overlayp data)
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(overlay-buffer data)
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(buffer-name (overlay-buffer data)))
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(symbolp data)
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(integerp data)))
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;; Functions to convert the selection into various other selection types.
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;; Every selection type that Emacs handles is implemented this way, except
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;; for TIMESTAMP, which is a special case.
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(defun xselect--selection-bounds (value)
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"Return bounds of X selection value VALUE.
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The return value is a list (BEG END BUF) if VALUE is a cons of
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two markers or an overlay. Otherwise, it is nil."
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(cond ((bufferp value)
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(with-current-buffer value
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(when (mark t)
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(list (mark t) (point) value))))
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((and (consp value)
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(markerp (car value))
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(markerp (cdr value)))
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(when (and (marker-buffer (car value))
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(buffer-name (marker-buffer (car value)))
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(eq (marker-buffer (car value))
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(marker-buffer (cdr value))))
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(list (marker-position (car value))
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(marker-position (cdr value))
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(marker-buffer (car value)))))
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((overlayp value)
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(when (overlay-buffer value)
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(list (overlay-start value)
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(overlay-end value)
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(overlay-buffer value))))))
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(defun xselect--int-to-cons (n)
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(cons (ash n -16) (logand n 65535)))
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(defun xselect-convert-to-string (_selection type value)
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(let (str coding)
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;; Get the actual string from VALUE.
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(cond ((stringp value)
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(setq str value))
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((setq value (xselect--selection-bounds value))
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(with-current-buffer (nth 2 value)
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(setq str (buffer-substring (nth 0 value)
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(nth 1 value))))))
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(when str
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;; If TYPE is nil, this is a local request, thus return STR as
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;; is. Otherwise, encode STR.
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(if (not type)
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str
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(setq coding (or next-selection-coding-system selection-coding-system))
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(if coding
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(setq coding (coding-system-base coding)))
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(let ((inhibit-read-only t))
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;; Suppress producing escape sequences for compositions.
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(remove-text-properties 0 (length str) '(composition nil) str)
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(if (eq type 'TEXT)
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;; TEXT is a polymorphic target. We must select the
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;; actual type from `UTF8_STRING', `COMPOUND_TEXT',
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;; `STRING', and `C_STRING'.
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(if (not (multibyte-string-p str))
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(setq type 'C_STRING)
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(let (non-latin-1 non-unicode eight-bit)
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(mapc #'(lambda (x)
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(if (>= x #x100)
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(if (< x #x110000)
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(setq non-latin-1 t)
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(if (< x #x3FFF80)
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(setq non-unicode t)
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(setq eight-bit t)))))
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str)
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(setq type (if non-unicode 'COMPOUND_TEXT
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(if non-latin-1 'UTF8_STRING
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(if eight-bit 'C_STRING 'STRING)))))))
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(cond
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((eq type 'UTF8_STRING)
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(if (or (not coding)
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(not (eq (coding-system-type coding) 'utf-8)))
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(setq coding 'utf-8))
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(setq str (encode-coding-string str coding)))
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((eq type 'STRING)
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(if (or (not coding)
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(not (eq (coding-system-type coding) 'charset)))
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(setq coding 'iso-8859-1))
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(setq str (encode-coding-string str coding)))
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((eq type 'COMPOUND_TEXT)
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(if (or (not coding)
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(not (eq (coding-system-type coding) 'iso-2022)))
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(setq coding 'compound-text-with-extensions))
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(setq str (encode-coding-string str coding)))
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((eq type 'C_STRING)
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(setq str (string-make-unibyte str)))
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(t
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(error "Unknown selection type: %S" type)))))
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(setq next-selection-coding-system nil)
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(cons type str))))
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(defun xselect-convert-to-length (_selection _type value)
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(let ((len (cond ((stringp value)
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(length value))
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((setq value (xselect--selection-bounds value))
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(abs (- (nth 0 value) (nth 1 value)))))))
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(if len
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(xselect--int-to-cons len))))
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(defun xselect-convert-to-targets (_selection _type _value)
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;; return a vector of atoms, but remove duplicates first.
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(let* ((all (cons 'TIMESTAMP
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(cons 'MULTIPLE
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(mapcar 'car selection-converter-alist))))
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(rest all))
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(while rest
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(cond ((memq (car rest) (cdr rest))
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(setcdr rest (delq (car rest) (cdr rest))))
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((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret
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(setcdr rest (cdr (cdr rest))))
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(t
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(setq rest (cdr rest)))))
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(apply 'vector all)))
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(defun xselect-convert-to-delete (selection _type _value)
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(x-disown-selection-internal selection)
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;; A return value of nil means that we do not know how to do this conversion,
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;; and replies with an "error". A return value of NULL means that we have
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;; done the conversion (and any side-effects) but have no value to return.
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'NULL)
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(defun xselect-convert-to-filename (_selection _type value)
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(when (setq value (xselect--selection-bounds value))
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(buffer-file-name (nth 2 value))))
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(defun xselect-convert-to-charpos (_selection _type value)
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(when (setq value (xselect--selection-bounds value))
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(let ((beg (1- (nth 0 value))) ; zero-based
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(end (1- (nth 1 value))))
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(cons 'SPAN (vector (xselect--int-to-cons (min beg end))
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(xselect--int-to-cons (max beg end)))))))
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(defun xselect-convert-to-lineno (_selection _type value)
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(when (setq value (xselect--selection-bounds value))
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(with-current-buffer (nth 2 value)
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(let ((beg (line-number-at-pos (nth 0 value)))
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(end (line-number-at-pos (nth 1 value))))
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(cons 'SPAN (vector (xselect--int-to-cons (min beg end))
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(xselect--int-to-cons (max beg end))))))))
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(defun xselect-convert-to-colno (_selection _type value)
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(when (setq value (xselect--selection-bounds value))
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(with-current-buffer (nth 2 value)
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(let ((beg (progn (goto-char (nth 0 value)) (current-column)))
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(end (progn (goto-char (nth 1 value)) (current-column))))
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(cons 'SPAN (vector (xselect--int-to-cons (min beg end))
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(xselect--int-to-cons (max beg end))))))))
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(defun xselect-convert-to-os (_selection _type _size)
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(symbol-name system-type))
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(defun xselect-convert-to-host (_selection _type _size)
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(system-name))
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(defun xselect-convert-to-user (_selection _type _size)
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(user-full-name))
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(defun xselect-convert-to-class (_selection _type _size)
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"Convert selection to class.
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This function returns the string \"Emacs\"."
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"Emacs")
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;; We do not try to determine the name Emacs was invoked with,
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;; because it is not clean for a program's behavior to depend on that.
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(defun xselect-convert-to-name (_selection _type _size)
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"Convert selection to name.
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This function returns the string \"emacs\"."
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"emacs")
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(defun xselect-convert-to-integer (_selection _type value)
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(and (integerp value)
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(xselect--int-to-cons value)))
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(defun xselect-convert-to-atom (_selection _type value)
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(and (symbolp value) value))
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(defun xselect-convert-to-identity (_selection _type value) ; used internally
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(vector value))
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;; Null target that tells clipboard managers we support SAVE_TARGETS
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;; (see freedesktop.org Clipboard Manager spec).
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(defun xselect-convert-to-save-targets (selection _type _value)
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(when (eq selection 'CLIPBOARD)
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'NULL))
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(setq selection-converter-alist
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'((TEXT . xselect-convert-to-string)
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(COMPOUND_TEXT . xselect-convert-to-string)
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(STRING . xselect-convert-to-string)
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(UTF8_STRING . xselect-convert-to-string)
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(TARGETS . xselect-convert-to-targets)
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(LENGTH . xselect-convert-to-length)
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(DELETE . xselect-convert-to-delete)
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(FILE_NAME . xselect-convert-to-filename)
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(CHARACTER_POSITION . xselect-convert-to-charpos)
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(LINE_NUMBER . xselect-convert-to-lineno)
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(COLUMN_NUMBER . xselect-convert-to-colno)
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(OWNER_OS . xselect-convert-to-os)
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(HOST_NAME . xselect-convert-to-host)
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(USER . xselect-convert-to-user)
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(CLASS . xselect-convert-to-class)
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(NAME . xselect-convert-to-name)
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(ATOM . xselect-convert-to-atom)
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(INTEGER . xselect-convert-to-integer)
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(SAVE_TARGETS . xselect-convert-to-save-targets)
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(_EMACS_INTERNAL . xselect-convert-to-identity)))
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(provide 'select)
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;;; select.el ends here
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