;;; notifications.el --- Client interface to desktop notifications. ;; Copyright (C) 2010-2011 Free Software Foundation, Inc. ;; Author: Julien Danjou ;; Keywords: comm desktop notifications ;; This file is part of GNU Emacs. ;; GNU Emacs is free software: you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation, either version 3 of the License, or ;; (at your option) any later version. ;; GNU Emacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with GNU Emacs. If not, see . ;;; Commentary: ;; This package provides an implementation of the Desktop Notifications ;; . ;; In order to activate this package, you must add the following code ;; into your .emacs: ;; ;; (require 'notifications) ;;; Code: (eval-when-compile (require 'cl)) ;; Pacify byte-compiler. D-Bus support in the Emacs core can be ;; disabled with configuration option "--without-dbus". Declare used ;; subroutines and variables of `dbus' therefore. (declare-function dbus-call-method "dbusbind.c") (declare-function dbus-register-signal "dbusbind.c") (require 'dbus) (defconst notifications-specification-version "1.1" "The version of the Desktop Notifications Specification implemented.") (defconst notifications-application-name "Emacs" "Default application name.") (defconst notifications-application-icon (expand-file-name "images/icons/hicolor/scalable/apps/emacs.svg" data-directory) "Default application icon.") (defconst notifications-service "org.freedesktop.Notifications" "D-Bus notifications service name.") (defconst notifications-path "/org/freedesktop/Notifications" "D-Bus notifications service path.") (defconst notifications-interface "org.freedesktop.Notifications" "D-Bus notifications service path.") (defconst notifications-notify-method "Notify" "D-Bus notifications service path.") (defconst notifications-close-notification-method "CloseNotification" "D-Bus notifications service path.") (defconst notifications-action-signal "ActionInvoked" "D-Bus notifications action signal.") (defconst notifications-closed-signal "NotificationClosed" "D-Bus notifications closed signal.") (defconst notifications-closed-reason '((1 expired) (2 dismissed) (3 close-notification) (4 undefined)) "List of reasons why a notification has been closed.") (defvar notifications-on-action-map nil "Mapping between notification and action callback functions.") (defvar notifications-on-close-map nil "Mapping between notification and close callback functions.") (defun notifications-on-action-signal (id action) "Dispatch signals to callback functions from `notifications-on-action-map'." (let ((entry (assoc id notifications-on-action-map))) (when entry (funcall (cadr entry) id action) (remove entry 'notifications-on-action-map)))) (when (fboundp 'dbus-register-signal) (dbus-register-signal :session notifications-service notifications-path notifications-interface notifications-action-signal 'notifications-on-action-signal)) (defun notifications-on-closed-signal (id reason) "Dispatch signals to callback functions from `notifications-on-closed-map'." (let ((entry (assoc id notifications-on-close-map))) (when entry (funcall (cadr entry) id (cadr (assoc reason notifications-closed-reason))) (remove entry 'notifications-on-close-map)))) (when (fboundp 'dbus-register-signal) (dbus-register-signal :session notifications-service notifications-path notifications-interface notifications-closed-signal 'notifications-on-closed-signal)) (defun notifications-notify (&rest params) "Send notification via D-Bus using the Freedesktop notification protocol. Various PARAMS can be set: :title The notification title. :body The notification body text. :app-name The name of the application sending the notification. Default to `notifications-application-name'. :replaces-id The notification ID that this notification replaces. :app-icon The notification icon. Default is `notifications-application-icon'. Set to nil if you do not want any icon displayed. :actions A list of actions in the form: (KEY TITLE KEY TITLE ...) where KEY and TITLE are both strings. The default action (usually invoked by clicking the notification) should have a key named \"default\". The title can be anything, though implementations are free not to display it. :timeout The timeout time in milliseconds since the display of the notification at which the notification should automatically close. If -1, the notification's expiration time is dependent on the notification server's settings, and may vary for the type of notification. If 0, the notification never expires. Default value is -1. :urgency The urgency level. Either `low', `normal' or `critical'. :category The type of notification this is. :desktop-entry This specifies the name of the desktop filename representing the calling program. :image-data This is a raw data image format which describes the width, height, rowstride, has alpha, bits per sample, channels and image data respectively. :image-path This is represented either as a URI (file:// is the only URI schema supported right now) or a name in a freedesktop.org-compliant icon theme. :sound-file The path to a sound file to play when the notification pops up. :sound-name A themeable named sound from the freedesktop.org sound naming specification to play when the notification pops up. Similar to icon-name,only for sounds. An example would be \"message-new-instant\". :suppress-sound Causes the server to suppress playing any sounds, if it has that ability. :x Specifies the X location on the screen that the notification should point to. The \"y\" hint must also be specified. :y Specifies the Y location on the screen that the notification should point to. The \"x\" hint must also be specified. :on-action Function to call when an action is invoked. The notification id and the key of the action are passed as arguments to the function. :on-close Function to call when the notification has been closed by timeout or by the user. The function receive the notification id and the closing reason as arguments: - `expired' if the notification has expired - `dismissed' if the notification was dismissed by the user - `close-notification' if the notification was closed by a call to CloseNotification This function returns a notification id, an integer, which can be used to manipulate the notification item with `notifications-close'." (let ((title (plist-get params :title)) (body (plist-get params :body)) (app-name (plist-get params :app-name)) (replaces-id (plist-get params :replaces-id)) (app-icon (plist-get params :app-icon)) (actions (plist-get params :actions)) (timeout (plist-get params :timeout)) ;; Hints (hints '()) (urgency (plist-get params :urgency)) (category (plist-get params :category)) (desktop-entry (plist-get params :desktop-entry)) (image-data (plist-get params :image-data)) (image-path (plist-get params :image-path)) (sound-file (plist-get params :sound-file)) (sound-name (plist-get params :sound-name)) (suppress-sound (plist-get params :suppress-sound)) (x (plist-get params :x)) (y (plist-get params :y)) id) ;; Build hints array (when urgency (add-to-list 'hints `(:dict-entry "urgency" (:variant :byte ,(case urgency (low 0) (critical 2) (t 1)))) t)) (when category (add-to-list 'hints `(:dict-entry "category" (:variant :string ,category)) t)) (when desktop-entry (add-to-list 'hints `(:dict-entry "desktop-entry" (:variant :string ,desktop-entry)) t)) (when image-data (add-to-list 'hints `(:dict-entry "image_data" (:variant :struct ,image-data)) t)) (when image-path (add-to-list 'hints `(:dict-entry "image_path" (:variant :string ,image-path)) t)) (when sound-file (add-to-list 'hints `(:dict-entry "sound-file" (:variant :string ,sound-file)) t)) (when sound-name (add-to-list 'hints `(:dict-entry "sound-name" (:variant :string ,sound-name)) t)) (when suppress-sound (add-to-list 'hints `(:dict-entry "suppress-sound" (:variant :boolean ,suppress-sound)) t)) (when x (add-to-list 'hints `(:dict-entry "x" (:variant :int32 ,x)) t)) (when y (add-to-list 'hints `(:dict-entry "y" (:variant :int32 ,y)) t)) ;; Call Notify method (setq id (dbus-call-method :session notifications-service notifications-path notifications-interface notifications-notify-method :string (or app-name notifications-application-name) :uint32 (or replaces-id 0) :string (if app-icon (expand-file-name app-icon) ;; If app-icon is nil because user ;; requested it to be so, send the ;; empty string (if (plist-member params :app-icon) "" ;; Otherwise send the default icon path notifications-application-icon)) :string (or title "") :string (or body "") `(:array ,@actions) (or hints '(:array :signature "{sv}")) :int32 (or timeout -1))) ;; Register close/action callback function (let ((on-action (plist-get params :on-action)) (on-close (plist-get params :on-close))) (when on-action (add-to-list 'notifications-on-action-map (list id on-action))) (when on-close (add-to-list 'notifications-on-close-map (list id on-close)))) ;; Return notification id id)) (defun notifications-close-notification (id) "Close a notification with identifier ID." (dbus-call-method :session notifications-service notifications-path notifications-interface notifications-close-notification-method :int32 id)) (provide 'notifications)