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41a86354 MA |
1 | ;;; notifications.el --- Client interface to desktop notifications. |
2 | ||
ba318903 | 3 | ;; Copyright (C) 2010-2014 Free Software Foundation, Inc. |
41a86354 MA |
4 | |
5 | ;; Author: Julien Danjou <julien@danjou.info> | |
6 | ;; Keywords: comm desktop notifications | |
7 | ||
8 | ;; This file is part of GNU Emacs. | |
9 | ||
10 | ;; GNU Emacs is free software: you can redistribute it and/or modify | |
11 | ;; it under the terms of the GNU General Public License as published by | |
12 | ;; the Free Software Foundation, either version 3 of the License, or | |
13 | ;; (at your option) any later version. | |
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 | |
21 | ;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. | |
22 | ||
23 | ;;; Commentary: | |
24 | ||
25 | ;; This package provides an implementation of the Desktop Notifications | |
e43042fe | 26 | ;; <http://developer.gnome.org/notification-spec/>. |
41a86354 MA |
27 | |
28 | ;; In order to activate this package, you must add the following code | |
29 | ;; into your .emacs: | |
30 | ;; | |
31 | ;; (require 'notifications) | |
32 | ||
7f5c46c7 MA |
33 | ;; For proper usage, Emacs must be started in an environment with an |
34 | ;; active D-Bus session bus. | |
35 | ||
41a86354 | 36 | ;;; Code: |
41a86354 MA |
37 | (require 'dbus) |
38 | ||
e43042fe | 39 | (defconst notifications-specification-version "1.2" |
7ea2d383 MA |
40 | "The version of the Desktop Notifications Specification implemented.") |
41 | ||
41a86354 MA |
42 | (defconst notifications-application-name "Emacs" |
43 | "Default application name.") | |
44 | ||
45 | (defconst notifications-application-icon | |
46 | (expand-file-name | |
47 | "images/icons/hicolor/scalable/apps/emacs.svg" | |
48 | data-directory) | |
49 | "Default application icon.") | |
50 | ||
51 | (defconst notifications-service "org.freedesktop.Notifications" | |
52 | "D-Bus notifications service name.") | |
53 | ||
54 | (defconst notifications-path "/org/freedesktop/Notifications" | |
55 | "D-Bus notifications service path.") | |
56 | ||
57 | (defconst notifications-interface "org.freedesktop.Notifications" | |
b613912b | 58 | "D-Bus notifications service interface.") |
41a86354 MA |
59 | |
60 | (defconst notifications-notify-method "Notify" | |
b613912b | 61 | "D-Bus notifications notify method.") |
41a86354 MA |
62 | |
63 | (defconst notifications-close-notification-method "CloseNotification" | |
b613912b MA |
64 | "D-Bus notifications close notification method.") |
65 | ||
66 | (defconst notifications-get-capabilities-method "GetCapabilities" | |
67 | "D-Bus notifications get capabilities method.") | |
41a86354 | 68 | |
499a0f7a MA |
69 | (defconst notifications-get-server-information-method "GetServerInformation" |
70 | "D-Bus notifications get server information method.") | |
71 | ||
41a86354 MA |
72 | (defconst notifications-action-signal "ActionInvoked" |
73 | "D-Bus notifications action signal.") | |
74 | ||
75 | (defconst notifications-closed-signal "NotificationClosed" | |
76 | "D-Bus notifications closed signal.") | |
77 | ||
78 | (defconst notifications-closed-reason | |
79 | '((1 expired) | |
80 | (2 dismissed) | |
81 | (3 close-notification) | |
82 | (4 undefined)) | |
83 | "List of reasons why a notification has been closed.") | |
84 | ||
85 | (defvar notifications-on-action-map nil | |
86 | "Mapping between notification and action callback functions.") | |
87 | ||
6612a284 MA |
88 | (defvar notifications-on-action-object nil |
89 | "Object for registered on-action signal.") | |
90 | ||
41a86354 MA |
91 | (defvar notifications-on-close-map nil |
92 | "Mapping between notification and close callback functions.") | |
93 | ||
6612a284 MA |
94 | (defvar notifications-on-close-object nil |
95 | "Object for registered on-close signal.") | |
96 | ||
41a86354 | 97 | (defun notifications-on-action-signal (id action) |
fa4003da | 98 | "Dispatch signals to callback functions from `notifications-on-action-map'." |
1c6ef030 MA |
99 | (let* ((bus (dbus-event-bus-name last-input-event)) |
100 | (unique-name (dbus-event-service-name last-input-event)) | |
101 | (entry (assoc (list bus unique-name id) notifications-on-action-map))) | |
a41a6cf4 | 102 | (when entry |
fa4003da | 103 | (funcall (cadr entry) id action) |
6612a284 MA |
104 | (when (and (not (setq notifications-on-action-map |
105 | (remove entry notifications-on-action-map))) | |
106 | notifications-on-action-object) | |
107 | (dbus-unregister-object notifications-on-action-object) | |
108 | (setq notifications-on-action-object nil))))) | |
41a86354 | 109 | |
5b77774d | 110 | (defun notifications-on-closed-signal (id &optional reason) |
fa4003da | 111 | "Dispatch signals to callback functions from `notifications-on-closed-map'." |
5b77774d MA |
112 | ;; notification-daemon prior 0.4.0 does not send a reason. So we |
113 | ;; make it optional, and assume `undefined' as default. | |
1c6ef030 MA |
114 | (let* ((bus (dbus-event-bus-name last-input-event)) |
115 | (unique-name (dbus-event-service-name last-input-event)) | |
116 | (entry (assoc (list bus unique-name id) notifications-on-close-map)) | |
a41a6cf4 MA |
117 | (reason (or reason 4))) |
118 | (when entry | |
fa4003da MA |
119 | (funcall (cadr entry) |
120 | id (cadr (assoc reason notifications-closed-reason))) | |
6612a284 MA |
121 | (when (and (not (setq notifications-on-close-map |
122 | (remove entry notifications-on-close-map))) | |
123 | notifications-on-close-object) | |
124 | (dbus-unregister-object notifications-on-close-object) | |
125 | (setq notifications-on-close-object nil))))) | |
41a86354 MA |
126 | |
127 | (defun notifications-notify (&rest params) | |
128 | "Send notification via D-Bus using the Freedesktop notification protocol. | |
129 | Various PARAMS can be set: | |
130 | ||
1c6ef030 | 131 | :bus The D-Bus bus, if different from `:session'. |
41a86354 MA |
132 | :title The notification title. |
133 | :body The notification body text. | |
134 | :app-name The name of the application sending the notification. | |
135 | Default to `notifications-application-name'. | |
136 | :replaces-id The notification ID that this notification replaces. | |
137 | :app-icon The notification icon. | |
138 | Default is `notifications-application-icon'. | |
139 | Set to nil if you do not want any icon displayed. | |
140 | :actions A list of actions in the form: | |
141 | (KEY TITLE KEY TITLE ...) | |
142 | where KEY and TITLE are both strings. | |
b978141d JB |
143 | The default action (usually invoked by clicking the |
144 | notification) should have a key named \"default\". | |
890a18d6 | 145 | The title can be anything, though implementations are free |
b978141d | 146 | not to display it. |
41a86354 MA |
147 | :timeout The timeout time in milliseconds since the display |
148 | of the notification at which the notification should | |
149 | automatically close. | |
150 | If -1, the notification's expiration time is dependent | |
151 | on the notification server's settings, and may vary for | |
152 | the type of notification. | |
153 | If 0, the notification never expires. | |
154 | Default value is -1. | |
155 | :urgency The urgency level. | |
156 | Either `low', `normal' or `critical'. | |
e43042fe MA |
157 | :action-items Whether the TITLE of the actions is interpreted as |
158 | a named icon. | |
41a86354 MA |
159 | :category The type of notification this is. |
160 | :desktop-entry This specifies the name of the desktop filename representing | |
161 | the calling program. | |
162 | :image-data This is a raw data image format which describes the width, | |
163 | height, rowstride, has alpha, bits per sample, channels and | |
164 | image data respectively. | |
7ea2d383 MA |
165 | :image-path This is represented either as a URI (file:// is the |
166 | only URI schema supported right now) or a name | |
167 | in a freedesktop.org-compliant icon theme. | |
41a86354 | 168 | :sound-file The path to a sound file to play when the notification pops up. |
40ba43b4 | 169 | :sound-name A themable named sound from the freedesktop.org sound naming |
7ea2d383 MA |
170 | specification to play when the notification pops up. |
171 | Similar to icon-name,only for sounds. An example would | |
172 | be \"message-new-instant\". | |
41a86354 MA |
173 | :suppress-sound Causes the server to suppress playing any sounds, if it has |
174 | that ability. | |
e43042fe MA |
175 | :resident When set the server will not automatically remove the |
176 | notification when an action has been invoked. | |
177 | :transient When set the server will treat the notification as transient | |
178 | and by-pass the server's persistence capability, if it | |
55a71479 | 179 | should exist. |
41a86354 | 180 | :x Specifies the X location on the screen that the notification |
b978141d | 181 | should point to. The \"y\" hint must also be specified. |
41a86354 | 182 | :y Specifies the Y location on the screen that the notification |
b978141d | 183 | should point to. The \"x\" hint must also be specified. |
fa4003da MA |
184 | :on-action Function to call when an action is invoked. |
185 | The notification id and the key of the action are passed | |
186 | as arguments to the function. | |
41a86354 MA |
187 | :on-close Function to call when the notification has been closed |
188 | by timeout or by the user. | |
fa4003da MA |
189 | The function receive the notification id and the closing |
190 | reason as arguments: | |
41a86354 MA |
191 | - `expired' if the notification has expired |
192 | - `dismissed' if the notification was dismissed by the user | |
193 | - `close-notification' if the notification was closed | |
194 | by a call to CloseNotification | |
66b907dc MA |
195 | - `undefined' if the notification server hasn't provided |
196 | a reason | |
41a86354 | 197 | |
b613912b MA |
198 | Which parameters are accepted by the notification server can be |
199 | checked via `notifications-get-capabilities'. | |
200 | ||
41a86354 MA |
201 | This function returns a notification id, an integer, which can be |
202 | used to manipulate the notification item with | |
66b907dc MA |
203 | `notifications-close-notification' or the `:replaces-id' argument |
204 | of another `notifications-notify' call." | |
1ef5f225 MA |
205 | (with-demoted-errors |
206 | (let ((bus (or (plist-get params :bus) :session)) | |
207 | (title (plist-get params :title)) | |
208 | (body (plist-get params :body)) | |
209 | (app-name (plist-get params :app-name)) | |
210 | (replaces-id (plist-get params :replaces-id)) | |
211 | (app-icon (plist-get params :app-icon)) | |
212 | (actions (plist-get params :actions)) | |
213 | (timeout (plist-get params :timeout)) | |
214 | ;; Hints | |
215 | (hints '()) | |
216 | (urgency (plist-get params :urgency)) | |
217 | (category (plist-get params :category)) | |
218 | (desktop-entry (plist-get params :desktop-entry)) | |
219 | (image-data (plist-get params :image-data)) | |
220 | (image-path (plist-get params :image-path)) | |
221 | (action-items (plist-get params :action-items)) | |
222 | (sound-file (plist-get params :sound-file)) | |
223 | (sound-name (plist-get params :sound-name)) | |
224 | (suppress-sound (plist-get params :suppress-sound)) | |
225 | (resident (plist-get params :resident)) | |
226 | (transient (plist-get params :transient)) | |
227 | (x (plist-get params :x)) | |
228 | (y (plist-get params :y)) | |
229 | id) | |
230 | ;; Build hints array | |
231 | (when urgency | |
232 | (add-to-list 'hints `(:dict-entry | |
233 | "urgency" | |
234 | (:variant :byte ,(pcase urgency | |
235 | (`low 0) | |
236 | (`critical 2) | |
237 | (_ 1)))) t)) | |
238 | (when category | |
239 | (add-to-list 'hints `(:dict-entry | |
240 | "category" | |
241 | (:variant :string ,category)) t)) | |
242 | (when desktop-entry | |
243 | (add-to-list 'hints `(:dict-entry | |
244 | "desktop-entry" | |
245 | (:variant :string ,desktop-entry)) t)) | |
246 | (when image-data | |
247 | (add-to-list 'hints `(:dict-entry | |
248 | "image-data" | |
249 | (:variant :struct ,image-data)) t)) | |
250 | (when image-path | |
251 | (add-to-list 'hints `(:dict-entry | |
252 | "image-path" | |
253 | (:variant :string ,image-path)) t)) | |
254 | (when action-items | |
255 | (add-to-list 'hints `(:dict-entry | |
256 | "action-items" | |
257 | (:variant :boolean ,action-items)) t)) | |
258 | (when sound-file | |
259 | (add-to-list 'hints `(:dict-entry | |
260 | "sound-file" | |
261 | (:variant :string ,sound-file)) t)) | |
262 | (when sound-name | |
263 | (add-to-list 'hints `(:dict-entry | |
264 | "sound-name" | |
265 | (:variant :string ,sound-name)) t)) | |
266 | (when suppress-sound | |
267 | (add-to-list 'hints `(:dict-entry | |
268 | "suppress-sound" | |
269 | (:variant :boolean ,suppress-sound)) t)) | |
270 | (when resident | |
271 | (add-to-list 'hints `(:dict-entry | |
272 | "resident" | |
273 | (:variant :boolean ,resident)) t)) | |
274 | (when transient | |
275 | (add-to-list 'hints `(:dict-entry | |
276 | "transient" | |
277 | (:variant :boolean ,transient)) t)) | |
278 | (when x | |
279 | (add-to-list 'hints `(:dict-entry "x" (:variant :int32 ,x)) t)) | |
280 | (when y | |
281 | (add-to-list 'hints `(:dict-entry "y" (:variant :int32 ,y)) t)) | |
282 | ||
283 | ;; Call Notify method. | |
284 | (setq id | |
285 | (dbus-call-method bus | |
286 | notifications-service | |
287 | notifications-path | |
288 | notifications-interface | |
289 | notifications-notify-method | |
290 | :string (or app-name | |
291 | notifications-application-name) | |
292 | :uint32 (or replaces-id 0) | |
293 | :string (if app-icon | |
294 | (expand-file-name app-icon) | |
295 | ;; If app-icon is nil because user | |
296 | ;; requested it to be so, send the | |
297 | ;; empty string | |
298 | (if (plist-member params :app-icon) | |
299 | "" | |
300 | ;; Otherwise send the | |
301 | ;; default icon path | |
302 | notifications-application-icon)) | |
303 | :string (or title "") | |
304 | :string (or body "") | |
305 | `(:array ,@actions) | |
306 | (or hints '(:array :signature "{sv}")) | |
307 | :int32 (or timeout -1))) | |
308 | ||
309 | ;; Register close/action callback function. We must also | |
310 | ;; remember the daemon's unique name, because the daemon could | |
311 | ;; have restarted. | |
312 | (let ((on-action (plist-get params :on-action)) | |
313 | (on-close (plist-get params :on-close)) | |
314 | (unique-name (dbus-get-name-owner bus notifications-service))) | |
315 | (when on-action | |
316 | (add-to-list 'notifications-on-action-map | |
317 | (list (list bus unique-name id) on-action)) | |
318 | (unless notifications-on-action-object | |
319 | (setq notifications-on-action-object | |
320 | (dbus-register-signal | |
321 | bus | |
322 | nil | |
323 | notifications-path | |
324 | notifications-interface | |
325 | notifications-action-signal | |
326 | 'notifications-on-action-signal)))) | |
327 | ||
328 | (when on-close | |
329 | (add-to-list 'notifications-on-close-map | |
330 | (list (list bus unique-name id) on-close)) | |
331 | (unless notifications-on-close-object | |
332 | (setq notifications-on-close-object | |
333 | (dbus-register-signal | |
334 | bus | |
335 | nil | |
336 | notifications-path | |
337 | notifications-interface | |
338 | notifications-closed-signal | |
339 | 'notifications-on-closed-signal))))) | |
340 | ||
341 | ;; Return notification id | |
342 | id))) | |
41a86354 | 343 | |
1c6ef030 MA |
344 | (defun notifications-close-notification (id &optional bus) |
345 | "Close a notification with identifier ID. | |
346 | BUS can be a string denoting a D-Bus connection, the default is `:session'." | |
347 | (dbus-call-method (or bus :session) | |
41a86354 MA |
348 | notifications-service |
349 | notifications-path | |
350 | notifications-interface | |
351 | notifications-close-notification-method | |
d6f2380e | 352 | :uint32 id)) |
41a86354 | 353 | |
55a71479 JB |
354 | (defvar dbus-debug) ; used in the macroexpansion of dbus-ignore-errors |
355 | ||
1c6ef030 | 356 | (defun notifications-get-capabilities (&optional bus) |
499a0f7a | 357 | "Return the capabilities of the notification server, a list of symbols. |
1c6ef030 | 358 | BUS can be a string denoting a D-Bus connection, the default is `:session'. |
b613912b MA |
359 | The following capabilities can be expected: |
360 | ||
400386db MA |
361 | :actions The server will provide the specified actions |
362 | to the user. | |
363 | :action-icons Supports using icons instead of text for | |
364 | displaying actions. | |
365 | :body Supports body text. | |
366 | :body-hyperlinks The server supports hyperlinks in the notifications. | |
367 | :body-images The server supports images in the notifications. | |
368 | :body-markup Supports markup in the body text. | |
369 | :icon-multi The server will render an animation of all the | |
370 | frames in a given image array. | |
371 | :icon-static Supports display of exactly 1 frame of any | |
372 | given image array. This value is mutually exclusive | |
373 | with `:icon-multi'. | |
374 | :persistence The server supports persistence of notifications. | |
375 | :sound The server supports sounds on notifications. | |
e43042fe MA |
376 | |
377 | Further vendor-specific caps start with `:x-vendor', like `:x-gnome-foo-cap'." | |
378 | (dbus-ignore-errors | |
499a0f7a MA |
379 | (mapcar |
380 | (lambda (x) (intern (concat ":" x))) | |
381 | (dbus-call-method (or bus :session) | |
382 | notifications-service | |
383 | notifications-path | |
384 | notifications-interface | |
385 | notifications-get-capabilities-method)))) | |
386 | ||
387 | (defun notifications-get-server-information (&optional bus) | |
388 | "Return information on the notification server, a list of strings. | |
389 | BUS can be a string denoting a D-Bus connection, the default is `:session'. | |
390 | The returned list is (NAME VENDOR VERSION SPEC-VERSION). | |
391 | ||
392 | NAME The product name of the server. | |
393 | VENDOR The vendor name. For example, \"KDE\", \"GNOME\". | |
394 | VERSION The server's version number. | |
395 | SPEC-VERSION The specification version the server is compliant with. | |
396 | ||
397 | If SPEC_VERSION is missing, the server supports a specification | |
398 | prior to \"1.0\". | |
399 | ||
400 | See `notifications-specification-version' for the specification | |
401 | version this library is compliant with." | |
402 | (dbus-ignore-errors | |
1c6ef030 | 403 | (dbus-call-method (or bus :session) |
e43042fe MA |
404 | notifications-service |
405 | notifications-path | |
406 | notifications-interface | |
499a0f7a | 407 | notifications-get-server-information-method))) |
b613912b | 408 | |
41a86354 | 409 | (provide 'notifications) |