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- ;;; lselect.el --- Lucid interface to X Selections
-
- ;; Copyright (C) 1990, 1993 Free Software Foundation, Inc.
-
- ;; Keywords: emulations
-
- ;; This won't completely work until we support or emulate Lucid-style extents.
- ;; Based on Lucid's selection code.
-
- ;; 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:
-
- ;;; 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.)
-
- (defalias 'x-get-cutbuffer 'x-get-cut-buffer)
- (defalias 'x-store-cutbuffer 'x-set-cut-buffer)
-
- (or (find-face 'primary-selection)
- (make-face 'primary-selection))
-
- (or (find-face 'secondary-selection)
- (make-face 'secondary-selection))
-
- (defun x-get-secondary-selection ()
- "Return text selected from some X window."
- (x-get-selection-internal 'SECONDARY '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 type (setq type 'PRIMARY))
- (x-set-selection selection type)
- (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))))
- 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)
-
-
- ;;; 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)))
-
- ;;; lselect.el ends here.
-