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eec82323 | 1 | ;;; gnus-ems.el --- functions for making Gnus work under different Emacsen |
e84b4b86 | 2 | |
ba318903 | 3 | ;; Copyright (C) 1995-2014 Free Software Foundation, Inc. |
eec82323 | 4 | |
6748645f | 5 | ;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org> |
eec82323 LMI |
6 | ;; Keywords: news |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
5e809f55 | 10 | ;; GNU Emacs is free software: you can redistribute it and/or modify |
eec82323 | 11 | ;; it under the terms of the GNU General Public License as published by |
5e809f55 GM |
12 | ;; the Free Software Foundation, either version 3 of the License, or |
13 | ;; (at your option) any later version. | |
eec82323 LMI |
14 | |
15 | ;; GNU Emacs is distributed in the hope that it will be useful, | |
16 | ;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | ;; GNU General Public License for more details. | |
19 | ||
20 | ;; You should have received a copy of the GNU General Public License | |
5e809f55 | 21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
eec82323 LMI |
22 | |
23 | ;;; Commentary: | |
24 | ||
25 | ;;; Code: | |
26 | ||
4bcf2f05 DL |
27 | (eval-when-compile |
28 | (require 'cl) | |
29 | (require 'ring)) | |
eec82323 LMI |
30 | |
31 | ;;; Function aliases later to be redefined for XEmacs usage. | |
32 | ||
eec82323 | 33 | (defvar gnus-mouse-2 [mouse-2]) |
16409b0b | 34 | (defvar gnus-down-mouse-3 [down-mouse-3]) |
eec82323 | 35 | (defvar gnus-down-mouse-2 [down-mouse-2]) |
16409b0b | 36 | (defvar gnus-widget-button-keymap nil) |
a8151ef7 | 37 | (defvar gnus-mode-line-modified |
01c52d31 | 38 | (if (featurep 'xemacs) |
a8151ef7 LMI |
39 | '("--**-" . "-----") |
40 | '("**" "--"))) | |
eec82323 LMI |
41 | |
42 | (eval-and-compile | |
43 | (autoload 'gnus-xmas-define "gnus-xmas") | |
1e957e64 | 44 | (autoload 'gnus-xmas-redefine "gnus-xmas")) |
eec82323 | 45 | |
1e957e64 GM |
46 | (autoload 'gnus-get-buffer-create "gnus") |
47 | (autoload 'nnheader-find-etc-directory "nnheader") | |
23f87bed | 48 | (autoload 'smiley-region "smiley") |
06c43cdf DL |
49 | |
50 | (defun gnus-kill-all-overlays () | |
51 | "Delete all overlays in the current buffer." | |
52 | (let* ((overlayss (overlay-lists)) | |
53 | (buffer-read-only nil) | |
54 | (overlays (delq nil (nconc (car overlayss) (cdr overlayss))))) | |
55 | (while overlays | |
56 | (delete-overlay (pop overlays))))) | |
2d2f7f3e | 57 | |
eec82323 LMI |
58 | ;;; Mule functions. |
59 | ||
eec82323 | 60 | (defun gnus-mule-max-width-function (el max-width) |
16409b0b GM |
61 | `(let* ((val (eval (, el))) |
62 | (valstr (if (numberp val) | |
63 | (int-to-string val) val))) | |
64 | (if (> (length valstr) ,max-width) | |
65 | (truncate-string-to-width valstr ,max-width) | |
66 | valstr))) | |
6748645f | 67 | |
eec82323 | 68 | (eval-and-compile |
06c43cdf | 69 | (if (featurep 'xemacs) |
16409b0b | 70 | (gnus-xmas-define) |
eec82323 | 71 | (defvar gnus-mouse-face-prop 'mouse-face |
16409b0b | 72 | "Property used for highlighting mouse regions."))) |
eec82323 | 73 | |
9efa445f DN |
74 | (defvar gnus-tmp-unread) |
75 | (defvar gnus-tmp-replied) | |
76 | (defvar gnus-tmp-score-char) | |
77 | (defvar gnus-tmp-indentation) | |
78 | (defvar gnus-tmp-opening-bracket) | |
79 | (defvar gnus-tmp-lines) | |
80 | (defvar gnus-tmp-name) | |
81 | (defvar gnus-tmp-closing-bracket) | |
82 | (defvar gnus-tmp-subject-or-nil) | |
83 | (defvar gnus-check-before-posting) | |
84 | (defvar gnus-mouse-face) | |
85 | (defvar gnus-group-buffer) | |
eec82323 LMI |
86 | |
87 | (defun gnus-ems-redefine () | |
88 | (cond | |
4ddf0e64 | 89 | ((featurep 'xemacs) |
eec82323 LMI |
90 | (gnus-xmas-redefine)) |
91 | ||
92 | ((featurep 'mule) | |
93 | ;; Mule and new Emacs definitions | |
94 | ||
95 | ;; [Note] Now there are three kinds of mule implementations, | |
16409b0b | 96 | ;; original MULE, XEmacs/mule and Emacs 20+ including |
23f87bed MB |
97 | ;; MULE features. Unfortunately these APIs are different. In |
98 | ;; particular, Emacs (including original Mule) and XEmacs are | |
feee6240 | 99 | ;; quite different. However, this version of Gnus doesn't support |
16409b0b GM |
100 | ;; anything other than XEmacs 20+ and Emacs 20.3+. |
101 | ||
eec82323 | 102 | ;; Predicates to check are following: |
23f87bed | 103 | ;; (boundp 'MULE) is t only if Mule (original; anything older than |
eec82323 | 104 | ;; Mule 2.3) is running. |
23f87bed | 105 | ;; (featurep 'mule) is t when other mule variants are running. |
eec82323 | 106 | |
16409b0b | 107 | ;; It is possible to detect XEmacs/mule by (featurep 'mule) and |
23f87bed | 108 | ;; (featurep 'xemacs). In this case, the implementation for |
16409b0b | 109 | ;; XEmacs/mule may be shareable between XEmacs and XEmacs/mule. |
eec82323 LMI |
110 | |
111 | (defvar gnus-summary-display-table nil | |
112 | "Display table used in summary mode buffers.") | |
16409b0b | 113 | (defalias 'gnus-max-width-function 'gnus-mule-max-width-function) |
eec82323 LMI |
114 | |
115 | (when (boundp 'gnus-check-before-posting) | |
116 | (setq gnus-check-before-posting | |
117 | (delq 'long-lines | |
118 | (delq 'control-chars gnus-check-before-posting)))) | |
119 | ||
120 | (defun gnus-summary-line-format-spec () | |
121 | (insert gnus-tmp-unread gnus-tmp-replied | |
122 | gnus-tmp-score-char gnus-tmp-indentation) | |
123 | (put-text-property | |
124 | (point) | |
125 | (progn | |
126 | (insert | |
127 | gnus-tmp-opening-bracket | |
128 | (format "%4d: %-20s" | |
129 | gnus-tmp-lines | |
130 | (if (> (length gnus-tmp-name) 20) | |
16409b0b | 131 | (truncate-string-to-width gnus-tmp-name 20) |
eec82323 LMI |
132 | gnus-tmp-name)) |
133 | gnus-tmp-closing-bracket) | |
134 | (point)) | |
135 | gnus-mouse-face-prop gnus-mouse-face) | |
16409b0b | 136 | (insert " " gnus-tmp-subject-or-nil "\n"))))) |
eec82323 | 137 | |
01c52d31 MB |
138 | ;; Clone of `appt-select-lowest-window' in appt.el. |
139 | (defun gnus-select-lowest-window () | |
140 | "Select the lowest window on the frame." | |
141 | (let ((lowest-window (selected-window)) | |
142 | (bottom-edge (nth 3 (window-edges)))) | |
143 | (walk-windows (lambda (w) | |
144 | (let ((next-bottom-edge (nth 3 (window-edges w)))) | |
145 | (when (< bottom-edge next-bottom-edge) | |
146 | (setq bottom-edge next-bottom-edge | |
147 | lowest-window w))))) | |
148 | (select-window lowest-window))) | |
149 | ||
eec82323 LMI |
150 | (defun gnus-region-active-p () |
151 | "Say whether the region is active." | |
152 | (and (boundp 'transient-mark-mode) | |
153 | transient-mark-mode | |
154 | (boundp 'mark-active) | |
155 | mark-active)) | |
156 | ||
23f87bed MB |
157 | (defun gnus-mark-active-p () |
158 | "Non-nil means the mark and region are currently active in this buffer." | |
159 | mark-active) ; aliased to region-exists-p in XEmacs. | |
160 | ||
db48b197 | 161 | (autoload 'gnus-alive-p "gnus-util") |
407da272 | 162 | (autoload 'mm-disable-multibyte "mm-util") |
db48b197 | 163 | |
23f87bed MB |
164 | ;;; Image functions. |
165 | ||
166 | (defun gnus-image-type-available-p (type) | |
167 | (and (fboundp 'image-type-available-p) | |
11e95b02 MB |
168 | (if (fboundp 'display-images-p) |
169 | (display-images-p) | |
ebada6e0 TZ |
170 | t) |
171 | (image-type-available-p type))) | |
23f87bed MB |
172 | |
173 | (defun gnus-create-image (file &optional type data-p &rest props) | |
174 | (let ((face (plist-get props :face))) | |
175 | (when face | |
176 | (setq props (plist-put props :foreground (face-foreground face))) | |
177 | (setq props (plist-put props :background (face-background face)))) | |
4478e074 G |
178 | (ignore-errors |
179 | (apply 'create-image file type data-p props)))) | |
23f87bed | 180 | |
0c32d782 KY |
181 | (defun gnus-put-image (glyph &optional string category) |
182 | (let ((point (point))) | |
4ddab346 | 183 | (insert-image glyph (or string " ")) |
0c32d782 KY |
184 | (put-text-property point (point) 'gnus-image-category category) |
185 | (unless string | |
186 | (put-text-property (1- (point)) (point) | |
187 | 'gnus-image-text-deletable t)) | |
23f87bed MB |
188 | glyph)) |
189 | ||
190 | (defun gnus-remove-image (image &optional category) | |
01c52d31 MB |
191 | "Remove the image matching IMAGE and CATEGORY found first." |
192 | (let ((start (point-min)) | |
193 | val end) | |
194 | (while (and (not end) | |
195 | (or (setq val (get-text-property start 'display)) | |
196 | (and (setq start | |
197 | (next-single-property-change start 'display)) | |
198 | (setq val (get-text-property start 'display))))) | |
199 | (setq end (or (next-single-property-change start 'display) | |
200 | (point-max))) | |
201 | (if (and (equal val image) | |
202 | (equal (get-text-property start 'gnus-image-category) | |
23f87bed | 203 | category)) |
01c52d31 MB |
204 | (progn |
205 | (put-text-property start end 'display nil) | |
206 | (when (get-text-property start 'gnus-image-text-deletable) | |
207 | (delete-region start end))) | |
208 | (unless (= end (point-max)) | |
209 | (setq start end | |
210 | end nil)))))) | |
6748645f | 211 | |
c7b98a1c | 212 | (defmacro gnus-string-mark-left-to-right (string) |
e21bac42 G |
213 | (if (fboundp 'bidi-string-mark-left-to-right) |
214 | `(bidi-string-mark-left-to-right ,string) | |
c7b98a1c G |
215 | string)) |
216 | ||
a14b3417 | 217 | (eval-and-compile |
a41c2e6d G |
218 | ;; XEmacs does not have window-inside-pixel-edges |
219 | (defalias 'gnus-window-inside-pixel-edges | |
220 | (if (fboundp 'window-inside-pixel-edges) | |
221 | 'window-inside-pixel-edges | |
222 | 'window-pixel-edges)) | |
223 | ||
cf6a9685 GM |
224 | (if (or (featurep 'emacs) (fboundp 'set-process-plist)) |
225 | (progn ; these exist since Emacs 22.1 | |
a14b3417 KY |
226 | (defalias 'gnus-set-process-plist 'set-process-plist) |
227 | (defalias 'gnus-process-plist 'process-plist) | |
228 | (defalias 'gnus-process-get 'process-get) | |
229 | (defalias 'gnus-process-put 'process-put)) | |
230 | (defun gnus-set-process-plist (process plist) | |
231 | "Replace the plist of PROCESS with PLIST. Returns PLIST." | |
3fb8f8a1 KY |
232 | (put 'gnus-process-plist-internal process plist)) |
233 | ||
a14b3417 KY |
234 | (defun gnus-process-plist (process) |
235 | "Return the plist of PROCESS." | |
3fb8f8a1 KY |
236 | ;; This form works but can't prevent the plist data from |
237 | ;; growing infinitely. | |
238 | ;;(get 'gnus-process-plist-internal process) | |
239 | (let* ((plist (symbol-plist 'gnus-process-plist-internal)) | |
240 | (tem (memq process plist))) | |
241 | (prog1 | |
242 | (cadr tem) | |
243 | ;; Remove it from the plist data. | |
244 | (when tem | |
245 | (if (eq plist tem) | |
246 | (progn | |
247 | (setcar plist (caddr plist)) | |
248 | (setcdr plist (or (cdddr plist) '(nil)))) | |
249 | (setcdr (nthcdr (- (length plist) (length tem) 1) plist) | |
250 | (cddr tem))))))) | |
251 | ||
a14b3417 KY |
252 | (defun gnus-process-get (process propname) |
253 | "Return the value of PROCESS' PROPNAME property. | |
254 | This is the last value stored with `(gnus-process-put PROCESS PROPNAME VALUE)'." | |
255 | (plist-get (gnus-process-plist process) propname)) | |
3fb8f8a1 | 256 | |
a14b3417 KY |
257 | (defun gnus-process-put (process propname value) |
258 | "Change PROCESS' PROPNAME property to VALUE. | |
259 | It can be retrieved with `(gnus-process-get PROCESS PROPNAME)'." | |
260 | (gnus-set-process-plist process | |
b89666af | 261 | (plist-put (gnus-process-plist process) |
a14b3417 | 262 | propname value))))) |
2cdd366f | 263 | |
eec82323 LMI |
264 | (provide 'gnus-ems) |
265 | ||
eec82323 | 266 | ;;; gnus-ems.el ends here |