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