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- ;; Elisp interface to X Selections.
- ;; Copyright (C) 1990 Free Software Foundation, Inc.
-
- ;; This file is part of GNU Emacs.
-
- ;; GNU Emacs is distributed in the hope that it will be useful,
- ;; but WITHOUT ANY WARRANTY. No author or distributor
- ;; accepts responsibility to anyone for the consequences of using it
- ;; or for whether it serves any particular purpose or works at all,
- ;; unless he says so in writing. Refer to the GNU Emacs General Public
- ;; License for full details.
-
- ;; Everyone is granted permission to copy, modify and redistribute
- ;; GNU Emacs, but only under the conditions described in the
- ;; GNU Emacs General Public License. A copy of this license is
- ;; supposed to have been given to you along with GNU Emacs so you
- ;; can know your rights and responsibilities. It should be in a
- ;; file named COPYING. Among other things, the copyright notice
- ;; and this notice must be preserved on all copies.
-
- ;;; The selection code requires us to use certain symbols whose names are
- ;;; all upper-case; this may seem tasteless, but it makes there be a 1:1
- ;;; correspondence between these symbols and X Atoms (which are upcased.)
-
- (make-face 'primary-selection)
- (make-face 'secondary-selection)
-
- (defun x-get-selection ()
- "Return text selected from some X window."
- (x-get-selection-internal 'PRIMARY 'STRING))
-
- (defun x-get-secondary-selection ()
- "Return text selected from some X window."
- (x-get-selection-internal 'SECONDARY 'STRING))
-
- (defun x-get-clipboard ()
- "Return text pasted to the clipboard."
- (x-get-selection-internal 'CLIPBOARD 'STRING))
-
-
- (defvar primary-selection-extent nil
- "The extent of the primary selection; don't use this.")
-
- (defvar secondary-selection-extent nil
- "The extent of the secondary selection; don't use this.")
-
-
- (defun x-select-make-extent-for-selection (selection previous-extent face)
- ;; Given a selection, this makes an extent in the buffer which holds that
- ;; selection, for highlighting purposes. If the selection isn't associated
- ;; with a buffer, this does nothing.
- (let ((buffer nil)
- (valid (and (extentp previous-extent)
- (extent-buffer previous-extent)
- (buffer-name (extent-buffer previous-extent))))
- start end)
- (cond ((stringp selection)
- ;; if we're selecting a string, lose the previous extent used
- ;; to highlight the selection.
- (setq valid nil))
- ((consp selection)
- (setq start (min (car selection) (cdr selection))
- end (max (car selection) (cdr selection))
- valid (and valid
- (eq (marker-buffer (car selection))
- (extent-buffer previous-extent)))
- buffer (marker-buffer (car selection))))
- ((extentp selection)
- (setq start (extent-start-position selection)
- end (extent-end-position selection)
- valid (and valid
- (eq (extent-buffer selection)
- (extent-buffer previous-extent)))
- buffer (extent-buffer selection)))
- )
- (if (and (not valid)
- (extentp previous-extent)
- (extent-buffer previous-extent)
- (buffer-name (extent-buffer previous-extent)))
- (delete-extent previous-extent))
- (if (not buffer)
- ;; string case
- nil
- ;; normal case
- (if valid
- (set-extent-endpoints previous-extent start end)
- (setq previous-extent (make-extent start end buffer))
- ;; use same priority as mouse-highlighting so that conflicts between
- ;; the selection extent and a mouse-highlighted extent are resolved
- ;; by the usual size-and-endpoint-comparison method.
- (set-extent-priority previous-extent mouse-highlight-priority)
- (set-extent-face previous-extent face)))))
-
-
- (defun x-own-selection (selection &optional type)
- "Make a primary X Selection of the given argument.
- The argument may be a string, a cons of two markers, or an extent.
- In the latter cases the selection is considered to be the text
- between the markers, or the between extents endpoints."
- (interactive (if (not current-prefix-arg)
- (list (read-string "Store text for pasting: "))
- (list (cons ;; these need not be ordered.
- (copy-marker (point-marker))
- (copy-marker (mark-marker))))))
- (or (stringp selection)
- (extentp selection)
- (and (consp selection)
- (markerp (car selection))
- (markerp (cdr selection))
- (marker-buffer (car selection))
- (marker-buffer (cdr selection))
- (eq (marker-buffer (car selection))
- (marker-buffer (cdr selection)))
- (buffer-name (marker-buffer (car selection)))
- (buffer-name (marker-buffer (cdr selection))))
- (signal 'error (list "invalid selection" selection)))
- (or type (setq type 'PRIMARY))
- (x-own-selection-internal type selection)
- (cond ((eq type 'PRIMARY)
- (setq primary-selection-extent
- (x-select-make-extent-for-selection
- selection primary-selection-extent 'primary-selection)))
- ((eq type 'SECONDARY)
- (setq secondary-selection-extent
- (x-select-make-extent-for-selection
- selection secondary-selection-extent 'secondary-selection))))
- ;; kludgoriffic!
- (if (and zmacs-regions (eq type 'PRIMARY) (not (consp selection)))
- (setq zmacs-region-stays t))
- selection)
-
-
- (defun x-own-secondary-selection (selection &optional type)
- "Make a secondary X Selection of the given argument. The argument may be a
- string or a cons of two markers (in which case the selection is considered to
- be the text between those markers.)"
- (interactive (if (not current-prefix-arg)
- (list (read-string "Store text for pasting: "))
- (list (cons ;; these need not be ordered.
- (copy-marker (point-marker))
- (copy-marker (mark-marker))))))
- (x-own-selection selection 'SECONDARY))
-
-
- (defun x-own-clipboard (string)
- "Paste the given string to the X Clipboard."
- (x-own-selection string 'CLIPBOARD))
-
-
- (defun x-disown-selection (&optional secondary-p)
- "Assuming we own the selection, disown it. With an argument, discard the
- secondary selection instead of the primary selection."
- (x-disown-selection-internal (if secondary-p 'SECONDARY 'PRIMARY)))
-
- (defun x-dehilight-selection (selection)
- "for use as a value of x-lost-selection-hooks."
- (cond ((eq selection 'PRIMARY)
- (if primary-selection-extent
- (let ((inhibit-quit t))
- (delete-extent primary-selection-extent)
- (setq primary-selection-extent nil)))
- (if zmacs-regions (zmacs-deactivate-region)))
- ((eq selection 'SECONDARY)
- (if secondary-selection-extent
- (let ((inhibit-quit t))
- (delete-extent secondary-selection-extent)
- (setq secondary-selection-extent nil)))))
- nil)
-
- (setq x-lost-selection-hooks 'x-dehilight-selection)
-
- (defun x-notice-selection-requests (selection type successful)
- "for possible use as the value of x-sent-selection-hooks."
- (if (not successful)
- (message "Selection request failed to convert %s to %s"
- selection type)
- (message "Sent selection %s as %s" selection type)))
-
- (defun x-notice-selection-failures (selection type successful)
- "for possible use as the value of x-sent-selection-hooks."
- (or successful
- (message "Selection request failed to convert %s to %s"
- selection type)))
-
- ;(setq x-sent-selection-hooks 'x-notice-selection-requests)
- ;(setq x-sent-selection-hooks 'x-notice-selection-failures)
-
-
- ;;; Selections in killed buffers
- ;;; this function is called by kill-buffer as if it were on the
- ;;; kill-buffer-hook (though it isn't really.)
-
- (defun xselect-kill-buffer-hook ()
- ;; Probably the right thing is to write a C function to return a list
- ;; of the selections which emacs owns, since it could concievably own
- ;; a user-defined selection type that we've never heard of.
- (xselect-kill-buffer-hook-1 'PRIMARY)
- (xselect-kill-buffer-hook-1 'SECONDARY)
- (xselect-kill-buffer-hook-1 'CLIPBOARD))
-
- (defun xselect-kill-buffer-hook-1 (selection)
- (let (value)
- (if (and (x-selection-owner-p selection)
- (setq value (x-get-selection-internal selection '_EMACS_INTERNAL))
- ;; The _EMACS_INTERNAL selection type has a converter registered
- ;; for it that does no translation. This only works if emacs is
- ;; requesting the selection from itself. We could have done this
- ;; by writing a C function to return the raw selection data, and
- ;; that might be the right way to do this, but this was easy.
- (or (and (consp value)
- (markerp (car value))
- (eq (current-buffer) (marker-buffer (car value))))
- (and (extentp value)
- (eq (current-buffer) (extent-buffer value)))))
- (x-disown-selection-internal selection))))
-
-
- ;;; Cut Buffer support
-
- (defun x-get-cutbuffer (&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-cutbuffer-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-store-cutbuffer (string)
- "Store the given string into the X server's primary cut buffer.
- The previous value of the primary cut buffer is rotated to the secondary
- 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."
- (or (stringp string) (error "must be a string"))
- (x-rotate-cutbuffers-internal 1)
- (x-store-cutbuffer-internal 'CUT_BUFFER0 string))
-
-
- ;;; Random utility functions
-
- (defun x-kill-primary-selection ()
- "If there is a selection, delete the text it covers, and copy it to
- both the kill ring and the Clipboard."
- (interactive)
- (or (x-selection-owner-p) (error "emacs does not own the primary selection"))
- (setq last-command nil)
- (or primary-selection-extent
- (error "the primary selection is not an extent?"))
- (save-excursion
- (set-buffer (extent-buffer primary-selection-extent))
- (kill-region (extent-start-position primary-selection-extent)
- (extent-end-position primary-selection-extent)))
- (x-disown-selection nil))
-
- (defun x-delete-primary-selection ()
- "If there is a selection, delete the text it covers *without* copying it to
- the kill ring or the Clipboard."
- (interactive)
- (or (x-selection-owner-p) (error "emacs does not own the primary selection"))
- (setq last-command nil)
- (or primary-selection-extent
- (error "the primary selection is not an extent?"))
- (save-excursion
- (set-buffer (extent-buffer primary-selection-extent))
- (delete-region (extent-start-position primary-selection-extent)
- (extent-end-position primary-selection-extent)))
- (x-disown-selection nil))
-
- (defun x-copy-primary-selection ()
- "If there is a selection, copy it to both the kill ring and the Clipboard."
- (interactive)
- (setq last-command nil)
- (or (x-selection-owner-p) (error "emacs does not own the primary selection"))
- (or primary-selection-extent
- (error "the primary selection is not an extent?"))
- (save-excursion
- (set-buffer (extent-buffer primary-selection-extent))
- (copy-region-as-kill (extent-start-position primary-selection-extent)
- (extent-end-position primary-selection-extent))))
-
- (defun x-yank-clipboard-selection ()
- "If someone owns a Clipboard selection, insert it at point."
- (interactive)
- (setq last-command nil)
- (let ((clip (x-get-clipboard)))
- (or clip (error "there is no clipboard selection"))
- (push-mark)
- (insert clip)))
-
-
- ;;; 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)
- ((extentp value)
- (save-excursion
- (set-buffer (extent-buffer value))
- (buffer-substring (extent-start-position value)
- (extent-end-position 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))
- ((extentp value)
- (extent-length 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 ((extentp value)
- (buffer-file-name (or (extent-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 ((extentp value)
- (setq a (extent-start-position value)
- b (extent-end-position 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 ((extentp value)
- (setq buf (extent-buffer value)
- a (extent-start-position value)
- b (extent-end-position value)))
- ((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)))))
- (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 ((extentp value)
- (setq buf (extent-buffer value)
- a (extent-start-position value)
- b (extent-end-position value)))
- ((and (consp value)
- (markerp (car value))
- (markerp (cdr value)))
- (setq a (car value)
- b (cdr value)
- buf (marker-buffer a))))
- (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)
- x-emacs-application-class)
-
- (defun xselect-convert-to-name (selection type size)
- invocation-name)
-
- (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 'xselect)
-