mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-23 07:19:15 +00:00
236 lines
8.5 KiB
EmacsLisp
236 lines
8.5 KiB
EmacsLisp
;;; lselect.el --- Lucid interface to X Selections
|
||
|
||
;; Copyright (C) 1990, 1993 Free Software Foundation, Inc.
|
||
|
||
;; Maintainer: FSF
|
||
;; 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.
|
||
|
||
;;; Commentary:
|
||
|
||
;;; 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 (facep 'primary-selection)
|
||
(make-face 'primary-selection))
|
||
|
||
(or (facep '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)))
|
||
|
||
(provide 'lselect)
|
||
|
||
;;; lselect.el ends here
|