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3109d63f ER |
1 | ;;; lselect.el --- Lucid interface to X Selections |
2 | ||
b578f267 EN |
3 | ;; Copyright (C) 1990, 1993 Free Software Foundation, Inc. |
4 | ||
89aea802 | 5 | ;; Maintainer: FSF |
3109d63f ER |
6 | ;; Keywords: emulations |
7 | ||
8 | ;; This won't completely work until we support or emulate Lucid-style extents. | |
3109d63f ER |
9 | ;; Based on Lucid's selection code. |
10 | ||
11 | ;; This file is part of GNU Emacs. | |
12 | ||
13 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
14 | ;; it under the terms of the GNU General Public License as published by | |
15 | ;; the Free Software Foundation; either version 2, or (at your option) | |
16 | ;; any later version. | |
17 | ||
18 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
19 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | ;; GNU General Public License for more details. | |
22 | ||
23 | ;; You should have received a copy of the GNU General Public License | |
b578f267 EN |
24 | ;; along with GNU Emacs; see the file COPYING. If not, write to the |
25 | ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
26 | ;; Boston, MA 02111-1307, USA. | |
3109d63f | 27 | |
60370d40 PJ |
28 | ;;; Commentary: |
29 | ||
3109d63f ER |
30 | ;;; Code: |
31 | ||
0dd7b8f0 GM |
32 | ;; The selection code requires us to use certain symbols whose names are |
33 | ;; all upper-case; this may seem tasteless, but it makes there be a 1:1 | |
34 | ;; correspondence between these symbols and X Atoms (which are upcased.) | |
3109d63f | 35 | |
31e1d920 ER |
36 | (defalias 'x-get-cutbuffer 'x-get-cut-buffer) |
37 | (defalias 'x-store-cutbuffer 'x-set-cut-buffer) | |
3109d63f | 38 | |
0dd7b8f0 | 39 | (or (facep 'primary-selection) |
3109d63f ER |
40 | (make-face 'primary-selection)) |
41 | ||
0dd7b8f0 | 42 | (or (facep 'secondary-selection) |
3109d63f ER |
43 | (make-face 'secondary-selection)) |
44 | ||
45 | (defun x-get-secondary-selection () | |
46 | "Return text selected from some X window." | |
47 | (x-get-selection-internal 'SECONDARY 'STRING)) | |
48 | ||
49 | (defvar primary-selection-extent nil | |
50 | "The extent of the primary selection; don't use this.") | |
51 | ||
52 | (defvar secondary-selection-extent nil | |
53 | "The extent of the secondary selection; don't use this.") | |
54 | ||
55 | ||
56 | (defun x-select-make-extent-for-selection (selection previous-extent face) | |
57 | ;; Given a selection, this makes an extent in the buffer which holds that | |
58 | ;; selection, for highlighting purposes. If the selection isn't associated | |
59 | ;; with a buffer, this does nothing. | |
60 | (let ((buffer nil) | |
61 | (valid (and (extentp previous-extent) | |
62 | (extent-buffer previous-extent) | |
63 | (buffer-name (extent-buffer previous-extent)))) | |
64 | start end) | |
65 | (cond ((stringp selection) | |
66 | ;; if we're selecting a string, lose the previous extent used | |
67 | ;; to highlight the selection. | |
68 | (setq valid nil)) | |
69 | ((consp selection) | |
70 | (setq start (min (car selection) (cdr selection)) | |
71 | end (max (car selection) (cdr selection)) | |
72 | valid (and valid | |
73 | (eq (marker-buffer (car selection)) | |
74 | (extent-buffer previous-extent))) | |
75 | buffer (marker-buffer (car selection)))) | |
76 | ((extentp selection) | |
77 | (setq start (extent-start-position selection) | |
78 | end (extent-end-position selection) | |
79 | valid (and valid | |
80 | (eq (extent-buffer selection) | |
81 | (extent-buffer previous-extent))) | |
82 | buffer (extent-buffer selection))) | |
83 | ) | |
84 | (if (and (not valid) | |
85 | (extentp previous-extent) | |
86 | (extent-buffer previous-extent) | |
87 | (buffer-name (extent-buffer previous-extent))) | |
88 | (delete-extent previous-extent)) | |
89 | (if (not buffer) | |
90 | ;; string case | |
91 | nil | |
92 | ;; normal case | |
93 | (if valid | |
94 | (set-extent-endpoints previous-extent start end) | |
95 | (setq previous-extent (make-extent start end buffer)) | |
96 | ;; use same priority as mouse-highlighting so that conflicts between | |
97 | ;; the selection extent and a mouse-highlighted extent are resolved | |
98 | ;; by the usual size-and-endpoint-comparison method. | |
99 | (set-extent-priority previous-extent mouse-highlight-priority) | |
100 | (set-extent-face previous-extent face))))) | |
101 | ||
102 | ||
103 | (defun x-own-selection (selection &optional type) | |
104 | "Make a primary X Selection of the given argument. | |
105 | The argument may be a string, a cons of two markers, or an extent. | |
106 | In the latter cases the selection is considered to be the text | |
107 | between the markers, or the between extents endpoints." | |
108 | (interactive (if (not current-prefix-arg) | |
109 | (list (read-string "Store text for pasting: ")) | |
110 | (list (cons ;; these need not be ordered. | |
111 | (copy-marker (point-marker)) | |
112 | (copy-marker (mark-marker)))))) | |
113 | (or type (setq type 'PRIMARY)) | |
114 | (x-set-selection selection type) | |
115 | (cond ((eq type 'PRIMARY) | |
116 | (setq primary-selection-extent | |
117 | (x-select-make-extent-for-selection | |
118 | selection primary-selection-extent 'primary-selection))) | |
119 | ((eq type 'SECONDARY) | |
120 | (setq secondary-selection-extent | |
121 | (x-select-make-extent-for-selection | |
122 | selection secondary-selection-extent 'secondary-selection)))) | |
123 | selection) | |
124 | ||
125 | ||
126 | (defun x-own-secondary-selection (selection &optional type) | |
127 | "Make a secondary X Selection of the given argument. The argument may be a | |
128 | string or a cons of two markers (in which case the selection is considered to | |
129 | be the text between those markers.)" | |
130 | (interactive (if (not current-prefix-arg) | |
131 | (list (read-string "Store text for pasting: ")) | |
132 | (list (cons ;; these need not be ordered. | |
133 | (copy-marker (point-marker)) | |
134 | (copy-marker (mark-marker)))))) | |
135 | (x-own-selection selection 'SECONDARY)) | |
136 | ||
137 | ||
138 | (defun x-own-clipboard (string) | |
139 | "Paste the given string to the X Clipboard." | |
140 | (x-own-selection string 'CLIPBOARD)) | |
141 | ||
142 | ||
143 | (defun x-disown-selection (&optional secondary-p) | |
144 | "Assuming we own the selection, disown it. With an argument, discard the | |
145 | secondary selection instead of the primary selection." | |
146 | (x-disown-selection-internal (if secondary-p 'SECONDARY 'PRIMARY))) | |
147 | ||
148 | (defun x-dehilight-selection (selection) | |
149 | "for use as a value of x-lost-selection-hooks." | |
150 | (cond ((eq selection 'PRIMARY) | |
151 | (if primary-selection-extent | |
152 | (let ((inhibit-quit t)) | |
153 | (delete-extent primary-selection-extent) | |
154 | (setq primary-selection-extent nil))) | |
155 | (if zmacs-regions (zmacs-deactivate-region))) | |
156 | ((eq selection 'SECONDARY) | |
157 | (if secondary-selection-extent | |
158 | (let ((inhibit-quit t)) | |
159 | (delete-extent secondary-selection-extent) | |
160 | (setq secondary-selection-extent nil))))) | |
161 | nil) | |
162 | ||
163 | (setq x-lost-selection-hooks 'x-dehilight-selection) | |
164 | ||
165 | (defun x-notice-selection-requests (selection type successful) | |
166 | "for possible use as the value of x-sent-selection-hooks." | |
167 | (if (not successful) | |
168 | (message "Selection request failed to convert %s to %s" | |
169 | selection type) | |
170 | (message "Sent selection %s as %s" selection type))) | |
171 | ||
172 | (defun x-notice-selection-failures (selection type successful) | |
173 | "for possible use as the value of x-sent-selection-hooks." | |
174 | (or successful | |
175 | (message "Selection request failed to convert %s to %s" | |
176 | selection type))) | |
177 | ||
178 | ;(setq x-sent-selection-hooks 'x-notice-selection-requests) | |
179 | ;(setq x-sent-selection-hooks 'x-notice-selection-failures) | |
180 | ||
181 | \f | |
0dd7b8f0 | 182 | ;; Random utility functions |
3109d63f ER |
183 | |
184 | (defun x-kill-primary-selection () | |
185 | "If there is a selection, delete the text it covers, and copy it to | |
186 | both the kill ring and the Clipboard." | |
187 | (interactive) | |
188 | (or (x-selection-owner-p) (error "emacs does not own the primary selection")) | |
189 | (setq last-command nil) | |
190 | (or primary-selection-extent | |
191 | (error "the primary selection is not an extent?")) | |
192 | (save-excursion | |
193 | (set-buffer (extent-buffer primary-selection-extent)) | |
194 | (kill-region (extent-start-position primary-selection-extent) | |
195 | (extent-end-position primary-selection-extent))) | |
196 | (x-disown-selection nil)) | |
197 | ||
198 | (defun x-delete-primary-selection () | |
199 | "If there is a selection, delete the text it covers *without* copying it to | |
200 | the kill ring or the Clipboard." | |
201 | (interactive) | |
202 | (or (x-selection-owner-p) (error "emacs does not own the primary selection")) | |
203 | (setq last-command nil) | |
204 | (or primary-selection-extent | |
205 | (error "the primary selection is not an extent?")) | |
206 | (save-excursion | |
207 | (set-buffer (extent-buffer primary-selection-extent)) | |
208 | (delete-region (extent-start-position primary-selection-extent) | |
209 | (extent-end-position primary-selection-extent))) | |
210 | (x-disown-selection nil)) | |
211 | ||
212 | (defun x-copy-primary-selection () | |
213 | "If there is a selection, copy it to both the kill ring and the Clipboard." | |
214 | (interactive) | |
215 | (setq last-command nil) | |
216 | (or (x-selection-owner-p) (error "emacs does not own the primary selection")) | |
217 | (or primary-selection-extent | |
218 | (error "the primary selection is not an extent?")) | |
219 | (save-excursion | |
220 | (set-buffer (extent-buffer primary-selection-extent)) | |
221 | (copy-region-as-kill (extent-start-position primary-selection-extent) | |
222 | (extent-end-position primary-selection-extent)))) | |
223 | ||
224 | (defun x-yank-clipboard-selection () | |
225 | "If someone owns a Clipboard selection, insert it at point." | |
226 | (interactive) | |
227 | (setq last-command nil) | |
228 | (let ((clip (x-get-clipboard))) | |
229 | (or clip (error "there is no clipboard selection")) | |
230 | (push-mark) | |
231 | (insert clip))) | |
232 | ||
896546cd RS |
233 | (provide 'lselect) |
234 | ||
ab5796a9 | 235 | ;;; arch-tag: 92fa54d4-c5d1-4e9b-ad58-cf1e13930556 |
60370d40 | 236 | ;;; lselect.el ends here |