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236 lines
8.5 KiB
EmacsLisp
236 lines
8.5 KiB
EmacsLisp
;;; lselect.el --- Lucid interface to X Selections
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;; Copyright (C) 1990, 1993 Free Software Foundation, Inc.
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;; Maintainer: FSF
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;; Keywords: emulations
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;; This won't completely work until we support or emulate Lucid-style extents.
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;; Based on Lucid's selection code.
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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 2, or (at your option)
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;; 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; see the file COPYING. If not, write to the
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;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Commentary:
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;;; Code:
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;; The selection code requires us to use certain symbols whose names are
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;; all upper-case; this may seem tasteless, but it makes there be a 1:1
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;; correspondence between these symbols and X Atoms (which are upcased.)
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(defalias 'x-get-cutbuffer 'x-get-cut-buffer)
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(defalias 'x-store-cutbuffer 'x-set-cut-buffer)
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(or (facep 'primary-selection)
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(make-face 'primary-selection))
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(or (facep 'secondary-selection)
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(make-face 'secondary-selection))
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(defun x-get-secondary-selection ()
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"Return text selected from some X window."
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(x-get-selection-internal 'SECONDARY 'STRING))
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(defvar primary-selection-extent nil
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"The extent of the primary selection; don't use this.")
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(defvar secondary-selection-extent nil
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"The extent of the secondary selection; don't use this.")
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(defun x-select-make-extent-for-selection (selection previous-extent face)
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;; Given a selection, this makes an extent in the buffer which holds that
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;; selection, for highlighting purposes. If the selection isn't associated
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;; with a buffer, this does nothing.
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(let ((buffer nil)
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(valid (and (extentp previous-extent)
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(extent-buffer previous-extent)
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(buffer-name (extent-buffer previous-extent))))
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start end)
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(cond ((stringp selection)
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;; if we're selecting a string, lose the previous extent used
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;; to highlight the selection.
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(setq valid nil))
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((consp selection)
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(setq start (min (car selection) (cdr selection))
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end (max (car selection) (cdr selection))
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valid (and valid
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(eq (marker-buffer (car selection))
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(extent-buffer previous-extent)))
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buffer (marker-buffer (car selection))))
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((extentp selection)
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(setq start (extent-start-position selection)
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end (extent-end-position selection)
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valid (and valid
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(eq (extent-buffer selection)
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(extent-buffer previous-extent)))
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buffer (extent-buffer selection)))
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)
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(if (and (not valid)
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(extentp previous-extent)
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(extent-buffer previous-extent)
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(buffer-name (extent-buffer previous-extent)))
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(delete-extent previous-extent))
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(if (not buffer)
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;; string case
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nil
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;; normal case
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(if valid
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(set-extent-endpoints previous-extent start end)
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(setq previous-extent (make-extent start end buffer))
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;; use same priority as mouse-highlighting so that conflicts between
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;; the selection extent and a mouse-highlighted extent are resolved
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;; by the usual size-and-endpoint-comparison method.
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(set-extent-priority previous-extent mouse-highlight-priority)
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(set-extent-face previous-extent face)))))
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(defun x-own-selection (selection &optional type)
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"Make a primary X Selection of the given argument.
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The argument may be a string, a cons of two markers, or an extent.
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In the latter cases the selection is considered to be the text
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between the markers, or the between extents endpoints."
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(interactive (if (not current-prefix-arg)
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(list (read-string "Store text for pasting: "))
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(list (cons ;; these need not be ordered.
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(copy-marker (point-marker))
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(copy-marker (mark-marker))))))
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(or type (setq type 'PRIMARY))
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(x-set-selection selection type)
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(cond ((eq type 'PRIMARY)
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(setq primary-selection-extent
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(x-select-make-extent-for-selection
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selection primary-selection-extent 'primary-selection)))
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((eq type 'SECONDARY)
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(setq secondary-selection-extent
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(x-select-make-extent-for-selection
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selection secondary-selection-extent 'secondary-selection))))
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selection)
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(defun x-own-secondary-selection (selection &optional type)
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"Make a secondary X Selection of the given argument. The argument may be a
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string or a cons of two markers (in which case the selection is considered to
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be the text between those markers.)"
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(interactive (if (not current-prefix-arg)
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(list (read-string "Store text for pasting: "))
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(list (cons ;; these need not be ordered.
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(copy-marker (point-marker))
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(copy-marker (mark-marker))))))
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(x-own-selection selection 'SECONDARY))
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(defun x-own-clipboard (string)
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"Paste the given string to the X Clipboard."
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(x-own-selection string 'CLIPBOARD))
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(defun x-disown-selection (&optional secondary-p)
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"Assuming we own the selection, disown it. With an argument, discard the
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secondary selection instead of the primary selection."
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(x-disown-selection-internal (if secondary-p 'SECONDARY 'PRIMARY)))
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(defun x-dehilight-selection (selection)
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"for use as a value of x-lost-selection-hooks."
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(cond ((eq selection 'PRIMARY)
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(if primary-selection-extent
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(let ((inhibit-quit t))
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(delete-extent primary-selection-extent)
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(setq primary-selection-extent nil)))
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(if zmacs-regions (zmacs-deactivate-region)))
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((eq selection 'SECONDARY)
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(if secondary-selection-extent
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(let ((inhibit-quit t))
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(delete-extent secondary-selection-extent)
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(setq secondary-selection-extent nil)))))
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nil)
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(setq x-lost-selection-hooks 'x-dehilight-selection)
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(defun x-notice-selection-requests (selection type successful)
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"for possible use as the value of x-sent-selection-hooks."
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(if (not successful)
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(message "Selection request failed to convert %s to %s"
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selection type)
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(message "Sent selection %s as %s" selection type)))
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(defun x-notice-selection-failures (selection type successful)
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"for possible use as the value of x-sent-selection-hooks."
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(or successful
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(message "Selection request failed to convert %s to %s"
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selection type)))
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;(setq x-sent-selection-hooks 'x-notice-selection-requests)
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;(setq x-sent-selection-hooks 'x-notice-selection-failures)
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;; Random utility functions
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(defun x-kill-primary-selection ()
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"If there is a selection, delete the text it covers, and copy it to
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both the kill ring and the Clipboard."
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(interactive)
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(or (x-selection-owner-p) (error "emacs does not own the primary selection"))
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(setq last-command nil)
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(or primary-selection-extent
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(error "the primary selection is not an extent?"))
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(save-excursion
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(set-buffer (extent-buffer primary-selection-extent))
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(kill-region (extent-start-position primary-selection-extent)
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(extent-end-position primary-selection-extent)))
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(x-disown-selection nil))
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(defun x-delete-primary-selection ()
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"If there is a selection, delete the text it covers *without* copying it to
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the kill ring or the Clipboard."
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(interactive)
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(or (x-selection-owner-p) (error "emacs does not own the primary selection"))
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(setq last-command nil)
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(or primary-selection-extent
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(error "the primary selection is not an extent?"))
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(save-excursion
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(set-buffer (extent-buffer primary-selection-extent))
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(delete-region (extent-start-position primary-selection-extent)
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(extent-end-position primary-selection-extent)))
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(x-disown-selection nil))
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(defun x-copy-primary-selection ()
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"If there is a selection, copy it to both the kill ring and the Clipboard."
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(interactive)
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(setq last-command nil)
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(or (x-selection-owner-p) (error "emacs does not own the primary selection"))
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(or primary-selection-extent
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(error "the primary selection is not an extent?"))
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(save-excursion
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(set-buffer (extent-buffer primary-selection-extent))
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(copy-region-as-kill (extent-start-position primary-selection-extent)
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(extent-end-position primary-selection-extent))))
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(defun x-yank-clipboard-selection ()
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"If someone owns a Clipboard selection, insert it at point."
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(interactive)
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(setq last-command nil)
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(let ((clip (x-get-clipboard)))
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(or clip (error "there is no clipboard selection"))
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(push-mark)
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(insert clip)))
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(provide 'lselect)
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;;; lselect.el ends here
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