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1 | ;;; lselect.el --- Lucid interface to X Selections |
2 | ||
3 | ;; Keywords: emulations | |
4 | ||
5 | ;; This won't completely work until we support or emulate Lucid-style extents. | |
6 | ;; Copyright (C) 1990, 1993 Free Software Foundation, Inc. | |
7 | ;; Based on Lucid's selection code. | |
8 | ||
9 | ;; This file is part of GNU Emacs. | |
10 | ||
11 | ;; GNU Emacs is free software; you can redistribute it and/or modify | |
12 | ;; it under the terms of the GNU General Public License as published by | |
13 | ;; the Free Software Foundation; either version 2, or (at your option) | |
14 | ;; any later version. | |
15 | ||
16 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
17 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | ;; GNU General Public License for more details. | |
20 | ||
21 | ;; You should have received a copy of the GNU General Public License | |
22 | ;; along with GNU Emacs; see the file COPYING. If not, write to | |
23 | ;; the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | ||
25 | ;;; Code: | |
26 | ||
27 | ;;; The selection code requires us to use certain symbols whose names are | |
28 | ;;; all upper-case; this may seem tasteless, but it makes there be a 1:1 | |
29 | ;;; correspondence between these symbols and X Atoms (which are upcased.) | |
30 | ||
31e1d920 ER |
31 | (defalias 'x-get-cutbuffer 'x-get-cut-buffer) |
32 | (defalias 'x-store-cutbuffer 'x-set-cut-buffer) | |
3109d63f ER |
33 | |
34 | (or (find-face 'primary-selection) | |
35 | (make-face 'primary-selection)) | |
36 | ||
37 | (or (find-face 'secondary-selection) | |
38 | (make-face 'secondary-selection)) | |
39 | ||
40 | (defun x-get-secondary-selection () | |
41 | "Return text selected from some X window." | |
42 | (x-get-selection-internal 'SECONDARY 'STRING)) | |
43 | ||
44 | (defvar primary-selection-extent nil | |
45 | "The extent of the primary selection; don't use this.") | |
46 | ||
47 | (defvar secondary-selection-extent nil | |
48 | "The extent of the secondary selection; don't use this.") | |
49 | ||
50 | ||
51 | (defun x-select-make-extent-for-selection (selection previous-extent face) | |
52 | ;; Given a selection, this makes an extent in the buffer which holds that | |
53 | ;; selection, for highlighting purposes. If the selection isn't associated | |
54 | ;; with a buffer, this does nothing. | |
55 | (let ((buffer nil) | |
56 | (valid (and (extentp previous-extent) | |
57 | (extent-buffer previous-extent) | |
58 | (buffer-name (extent-buffer previous-extent)))) | |
59 | start end) | |
60 | (cond ((stringp selection) | |
61 | ;; if we're selecting a string, lose the previous extent used | |
62 | ;; to highlight the selection. | |
63 | (setq valid nil)) | |
64 | ((consp selection) | |
65 | (setq start (min (car selection) (cdr selection)) | |
66 | end (max (car selection) (cdr selection)) | |
67 | valid (and valid | |
68 | (eq (marker-buffer (car selection)) | |
69 | (extent-buffer previous-extent))) | |
70 | buffer (marker-buffer (car selection)))) | |
71 | ((extentp selection) | |
72 | (setq start (extent-start-position selection) | |
73 | end (extent-end-position selection) | |
74 | valid (and valid | |
75 | (eq (extent-buffer selection) | |
76 | (extent-buffer previous-extent))) | |
77 | buffer (extent-buffer selection))) | |
78 | ) | |
79 | (if (and (not valid) | |
80 | (extentp previous-extent) | |
81 | (extent-buffer previous-extent) | |
82 | (buffer-name (extent-buffer previous-extent))) | |
83 | (delete-extent previous-extent)) | |
84 | (if (not buffer) | |
85 | ;; string case | |
86 | nil | |
87 | ;; normal case | |
88 | (if valid | |
89 | (set-extent-endpoints previous-extent start end) | |
90 | (setq previous-extent (make-extent start end buffer)) | |
91 | ;; use same priority as mouse-highlighting so that conflicts between | |
92 | ;; the selection extent and a mouse-highlighted extent are resolved | |
93 | ;; by the usual size-and-endpoint-comparison method. | |
94 | (set-extent-priority previous-extent mouse-highlight-priority) | |
95 | (set-extent-face previous-extent face))))) | |
96 | ||
97 | ||
98 | (defun x-own-selection (selection &optional type) | |
99 | "Make a primary X Selection of the given argument. | |
100 | The argument may be a string, a cons of two markers, or an extent. | |
101 | In the latter cases the selection is considered to be the text | |
102 | between the markers, or the between extents endpoints." | |
103 | (interactive (if (not current-prefix-arg) | |
104 | (list (read-string "Store text for pasting: ")) | |
105 | (list (cons ;; these need not be ordered. | |
106 | (copy-marker (point-marker)) | |
107 | (copy-marker (mark-marker)))))) | |
108 | (or type (setq type 'PRIMARY)) | |
109 | (x-set-selection selection type) | |
110 | (cond ((eq type 'PRIMARY) | |
111 | (setq primary-selection-extent | |
112 | (x-select-make-extent-for-selection | |
113 | selection primary-selection-extent 'primary-selection))) | |
114 | ((eq type 'SECONDARY) | |
115 | (setq secondary-selection-extent | |
116 | (x-select-make-extent-for-selection | |
117 | selection secondary-selection-extent 'secondary-selection)))) | |
118 | selection) | |
119 | ||
120 | ||
121 | (defun x-own-secondary-selection (selection &optional type) | |
122 | "Make a secondary X Selection of the given argument. The argument may be a | |
123 | string or a cons of two markers (in which case the selection is considered to | |
124 | be the text between those markers.)" | |
125 | (interactive (if (not current-prefix-arg) | |
126 | (list (read-string "Store text for pasting: ")) | |
127 | (list (cons ;; these need not be ordered. | |
128 | (copy-marker (point-marker)) | |
129 | (copy-marker (mark-marker)))))) | |
130 | (x-own-selection selection 'SECONDARY)) | |
131 | ||
132 | ||
133 | (defun x-own-clipboard (string) | |
134 | "Paste the given string to the X Clipboard." | |
135 | (x-own-selection string 'CLIPBOARD)) | |
136 | ||
137 | ||
138 | (defun x-disown-selection (&optional secondary-p) | |
139 | "Assuming we own the selection, disown it. With an argument, discard the | |
140 | secondary selection instead of the primary selection." | |
141 | (x-disown-selection-internal (if secondary-p 'SECONDARY 'PRIMARY))) | |
142 | ||
143 | (defun x-dehilight-selection (selection) | |
144 | "for use as a value of x-lost-selection-hooks." | |
145 | (cond ((eq selection 'PRIMARY) | |
146 | (if primary-selection-extent | |
147 | (let ((inhibit-quit t)) | |
148 | (delete-extent primary-selection-extent) | |
149 | (setq primary-selection-extent nil))) | |
150 | (if zmacs-regions (zmacs-deactivate-region))) | |
151 | ((eq selection 'SECONDARY) | |
152 | (if secondary-selection-extent | |
153 | (let ((inhibit-quit t)) | |
154 | (delete-extent secondary-selection-extent) | |
155 | (setq secondary-selection-extent nil))))) | |
156 | nil) | |
157 | ||
158 | (setq x-lost-selection-hooks 'x-dehilight-selection) | |
159 | ||
160 | (defun x-notice-selection-requests (selection type successful) | |
161 | "for possible use as the value of x-sent-selection-hooks." | |
162 | (if (not successful) | |
163 | (message "Selection request failed to convert %s to %s" | |
164 | selection type) | |
165 | (message "Sent selection %s as %s" selection type))) | |
166 | ||
167 | (defun x-notice-selection-failures (selection type successful) | |
168 | "for possible use as the value of x-sent-selection-hooks." | |
169 | (or successful | |
170 | (message "Selection request failed to convert %s to %s" | |
171 | selection type))) | |
172 | ||
173 | ;(setq x-sent-selection-hooks 'x-notice-selection-requests) | |
174 | ;(setq x-sent-selection-hooks 'x-notice-selection-failures) | |
175 | ||
176 | \f | |
177 | ;;; Random utility functions | |
178 | ||
179 | (defun x-kill-primary-selection () | |
180 | "If there is a selection, delete the text it covers, and copy it to | |
181 | both the kill ring and the Clipboard." | |
182 | (interactive) | |
183 | (or (x-selection-owner-p) (error "emacs does not own the primary selection")) | |
184 | (setq last-command nil) | |
185 | (or primary-selection-extent | |
186 | (error "the primary selection is not an extent?")) | |
187 | (save-excursion | |
188 | (set-buffer (extent-buffer primary-selection-extent)) | |
189 | (kill-region (extent-start-position primary-selection-extent) | |
190 | (extent-end-position primary-selection-extent))) | |
191 | (x-disown-selection nil)) | |
192 | ||
193 | (defun x-delete-primary-selection () | |
194 | "If there is a selection, delete the text it covers *without* copying it to | |
195 | the kill ring or the Clipboard." | |
196 | (interactive) | |
197 | (or (x-selection-owner-p) (error "emacs does not own the primary selection")) | |
198 | (setq last-command nil) | |
199 | (or primary-selection-extent | |
200 | (error "the primary selection is not an extent?")) | |
201 | (save-excursion | |
202 | (set-buffer (extent-buffer primary-selection-extent)) | |
203 | (delete-region (extent-start-position primary-selection-extent) | |
204 | (extent-end-position primary-selection-extent))) | |
205 | (x-disown-selection nil)) | |
206 | ||
207 | (defun x-copy-primary-selection () | |
208 | "If there is a selection, copy it to both the kill ring and the Clipboard." | |
209 | (interactive) | |
210 | (setq last-command nil) | |
211 | (or (x-selection-owner-p) (error "emacs does not own the primary selection")) | |
212 | (or primary-selection-extent | |
213 | (error "the primary selection is not an extent?")) | |
214 | (save-excursion | |
215 | (set-buffer (extent-buffer primary-selection-extent)) | |
216 | (copy-region-as-kill (extent-start-position primary-selection-extent) | |
217 | (extent-end-position primary-selection-extent)))) | |
218 | ||
219 | (defun x-yank-clipboard-selection () | |
220 | "If someone owns a Clipboard selection, insert it at point." | |
221 | (interactive) | |
222 | (setq last-command nil) | |
223 | (let ((clip (x-get-clipboard))) | |
224 | (or clip (error "there is no clipboard selection")) | |
225 | (push-mark) | |
226 | (insert clip))) | |
227 | ||
228 | ;;; lselect.el ends here. |