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- ;;; select.el --- lisp portion of standard selection support.
-
- ;; Keywords: internal
-
- ;; Copyright (c) 1993, 1994 Free Software Foundation, Inc.
- ;; Based partially on earlier release by Lucid.
-
- ;; 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 2, 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; see the file COPYING. If not, write to the
- ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- ;; Boston, MA 02111-1307, USA.
-
- ;;; Code:
-
- ;; This is for temporary compatibility with pre-release Emacs 19.
- (defalias 'x-selection 'x-get-selection)
- (defun x-get-selection (&optional type data-type)
- "Return the value of an X Windows selection.
- The argument TYPE (default `PRIMARY') says which selection,
- and the argument DATA-TYPE (default `STRING') says how to convert the data."
- (x-get-selection-internal (or type 'PRIMARY) (or data-type 'STRING)))
-
- (defun x-get-clipboard ()
- "Return text pasted to the clipboard."
- (x-get-selection-internal 'CLIPBOARD 'STRING))
-
- (defun x-set-selection (type data)
- "Make an X Windows selection of type TYPE and value DATA.
- The argument TYPE (default `PRIMARY') says which selection,
- and DATA specifies the contents. DATA may be a string,
- a symbol, an integer (or a cons of two integers or list of two integers).
-
- The selection may also be a cons of two markers pointing to the same buffer,
- or an overlay. In these cases, the selection is considered to be the text
- between the markers *at whatever time the selection is examined*.
- Thus, editing done in the buffer after you specify the selection
- can alter the effective value of the selection.
-
- The data may also be a vector of valid non-vector selection values.
-
- Interactively, the text of the region is used as the selection value."
- (interactive (if (not current-prefix-arg)
- (list 'PRIMARY (read-string "Set text for pasting: "))
- (list 'PRIMARY (substring (region-beginning) (region-end)))))
- ;; This is for temporary compatibility with pre-release Emacs 19.
- (if (stringp type)
- (setq type (intern type)))
- (or (x-valid-simple-selection-p data)
- (and (vectorp data)
- (let ((valid t)
- (i (1- (length data))))
- (while (>= i 0)
- (or (x-valid-simple-selection-p (aref data i))
- (setq valid nil))
- (setq i (1- i)))
- valid))
- (signal 'error (list "invalid selection" data)))
- (or type (setq type 'PRIMARY))
- (if data
- (x-own-selection-internal type data)
- (x-disown-selection-internal type))
- data)
-
- (defun x-valid-simple-selection-p (data)
- (or (stringp data)
- (symbolp data)
- (integerp data)
- (and (consp data)
- (integerp (car data))
- (or (integerp (cdr data))
- (and (consp (cdr data))
- (integerp (car (cdr data))))))
- (overlayp data)
- (and (consp data)
- (markerp (car data))
- (markerp (cdr data))
- (marker-buffer (car data))
- (marker-buffer (cdr data))
- (eq (marker-buffer (car data))
- (marker-buffer (cdr data)))
- (buffer-name (marker-buffer (car data)))
- (buffer-name (marker-buffer (cdr data))))))
-
- ;;; Cut Buffer support
-
- (defun x-get-cut-buffer (&optional which-one)
- "Returns the value of one of the 8 X server cut-buffers. Optional arg
- WHICH-ONE should be a number from 0 to 7, defaulting to 0.
- Cut buffers are considered obsolete; you should use selections instead."
- (x-get-cut-buffer-internal
- (if which-one
- (aref [CUT_BUFFER0 CUT_BUFFER1 CUT_BUFFER2 CUT_BUFFER3
- CUT_BUFFER4 CUT_BUFFER5 CUT_BUFFER6 CUT_BUFFER7]
- which-one)
- 'CUT_BUFFER0)))
-
- (defun x-set-cut-buffer (string &optional push)
- "Store STRING into the X server's primary cut buffer.
- If PUSH is non-nil, also rotate the cut buffers:
- this means the previous value of the primary cut buffer moves the second
- cut buffer, and the second to the third, and so on (there are 8 buffers.)
- Cut buffers are considered obsolete; you should use selections instead."
- ;; Check the data type of STRING.
- (substring string 0 0)
- (if push
- (x-rotate-cut-buffers-internal 1))
- (x-store-cut-buffer-internal 'CUT_BUFFER0 string))
-
-
- ;;; Functions to convert the selection into various other selection types.
- ;;; Every selection type that Emacs handles is implemented this way, except
- ;;; for TIMESTAMP, which is a special case.
-
- (defun xselect-convert-to-string (selection type value)
- (cond ((stringp value)
- value)
- ((overlayp value)
- (save-excursion
- (or (buffer-name (overlay-buffer value))
- (error "selection is in a killed buffer"))
- (set-buffer (overlay-buffer value))
- (buffer-substring (overlay-start value)
- (overlay-end value))))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (or (eq (marker-buffer (car value)) (marker-buffer (cdr value)))
- (signal 'error
- (list "markers must be in the same buffer"
- (car value) (cdr value))))
- (save-excursion
- (set-buffer (or (marker-buffer (car value))
- (error "selection is in a killed buffer")))
- (buffer-substring (car value) (cdr value))))
- (t nil)))
-
- (defun xselect-convert-to-length (selection type value)
- (let ((value
- (cond ((stringp value)
- (length value))
- ((overlayp value)
- (abs (- (overlay-end value) (overlay-start value))))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (or (eq (marker-buffer (car value))
- (marker-buffer (cdr value)))
- (signal 'error
- (list "markers must be in the same buffer"
- (car value) (cdr value))))
- (abs (- (car value) (cdr value)))))))
- (if value ; force it to be in 32-bit format.
- (cons (ash value -16) (logand value 65535))
- nil)))
-
- (defun xselect-convert-to-targets (selection type value)
- ;; return a vector of atoms, but remove duplicates first.
- (let* ((all (cons 'TIMESTAMP (mapcar 'car selection-converter-alist)))
- (rest all))
- (while rest
- (cond ((memq (car rest) (cdr rest))
- (setcdr rest (delq (car rest) (cdr rest))))
- ((eq (car (cdr rest)) '_EMACS_INTERNAL) ; shh, it's a secret
- (setcdr rest (cdr (cdr rest))))
- (t
- (setq rest (cdr rest)))))
- (apply 'vector all)))
-
- (defun xselect-convert-to-delete (selection type value)
- (x-disown-selection-internal selection)
- ;; A return value of nil means that we do not know how to do this conversion,
- ;; and replies with an "error". A return value of NULL means that we have
- ;; done the conversion (and any side-effects) but have no value to return.
- 'NULL)
-
- (defun xselect-convert-to-filename (selection type value)
- (cond ((overlayp value)
- (buffer-file-name (or (overlay-buffer value)
- (error "selection is in a killed buffer"))))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (buffer-file-name (or (marker-buffer (car value))
- (error "selection is in a killed buffer"))))
- (t nil)))
-
- (defun xselect-convert-to-charpos (selection type value)
- (let (a b tmp)
- (cond ((cond ((overlayp value)
- (setq a (overlay-start value)
- b (overlay-end value)))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (car value)
- b (cdr value))))
- (setq a (1- a) b (1- b)) ; zero-based
- (if (< b a) (setq tmp a a b b tmp))
- (cons 'SPAN
- (vector (cons (ash a -16) (logand a 65535))
- (cons (ash b -16) (logand b 65535))))))))
-
- (defun xselect-convert-to-lineno (selection type value)
- (let (a b buf tmp)
- (cond ((cond ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (marker-position (car value))
- b (marker-position (cdr value))
- buf (marker-buffer (car value))))
- ((overlayp value)
- (setq buf (overlay-buffer value)
- a (overlay-start value)
- b (overlay-end value)))
- )
- (save-excursion
- (set-buffer buf)
- (setq a (count-lines 1 a)
- b (count-lines 1 b)))
- (if (< b a) (setq tmp a a b b tmp))
- (cons 'SPAN
- (vector (cons (ash a -16) (logand a 65535))
- (cons (ash b -16) (logand b 65535))))))))
-
- (defun xselect-convert-to-colno (selection type value)
- (let (a b buf tmp)
- (cond ((cond ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (car value)
- b (cdr value)
- buf (marker-buffer a)))
- ((overlayp value)
- (setq buf (overlay-buffer value)
- a (overlay-start value)
- b (overlay-end value)))
- )
- (save-excursion
- (set-buffer buf)
- (goto-char a)
- (setq a (current-column))
- (goto-char b)
- (setq b (current-column)))
- (if (< b a) (setq tmp a a b b tmp))
- (cons 'SPAN
- (vector (cons (ash a -16) (logand a 65535))
- (cons (ash b -16) (logand b 65535))))))))
-
- (defun xselect-convert-to-os (selection type size)
- (symbol-name system-type))
-
- (defun xselect-convert-to-host (selection type size)
- (system-name))
-
- (defun xselect-convert-to-user (selection type size)
- (user-full-name))
-
- (defun xselect-convert-to-class (selection type size)
- "Emacs")
-
- ;; We do not try to determine the name Emacs was invoked with,
- ;; because it is not clean for a program's behavior to depend on that.
- (defun xselect-convert-to-name (selection type size)
- "emacs")
-
- (defun xselect-convert-to-integer (selection type value)
- (and (integerp value)
- (cons (ash value -16) (logand value 65535))))
-
- (defun xselect-convert-to-atom (selection type value)
- (and (symbolp value) value))
-
- (defun xselect-convert-to-identity (selection type value) ; used internally
- (vector value))
-
- (setq selection-converter-alist
- '((TEXT . xselect-convert-to-string)
- (STRING . xselect-convert-to-string)
- (TARGETS . xselect-convert-to-targets)
- (LENGTH . xselect-convert-to-length)
- (DELETE . xselect-convert-to-delete)
- (FILE_NAME . xselect-convert-to-filename)
- (CHARACTER_POSITION . xselect-convert-to-charpos)
- (LINE_NUMBER . xselect-convert-to-lineno)
- (COLUMN_NUMBER . xselect-convert-to-colno)
- (OWNER_OS . xselect-convert-to-os)
- (HOST_NAME . xselect-convert-to-host)
- (USER . xselect-convert-to-user)
- (CLASS . xselect-convert-to-class)
- (NAME . xselect-convert-to-name)
- (ATOM . xselect-convert-to-atom)
- (INTEGER . xselect-convert-to-integer)
- (_EMACS_INTERNAL . xselect-convert-to-identity)
- ))
-
- (provide 'select)
-
- ;;; select.el ends here.
-