55cec760ca
* exwm-systemtray.el (exwm-systemtray-height): The value is not available when emacsclient has just loaded the library (and it crashes emacsclient). * exwm-workspace.el (exwm-workspace--init): Set `default-minibuffer-frame' later to prevent it from being modified when using emacsclient. * exwm-floating.el: * exwm-randr.el: * exwm-systemtray.el: * exwm-workspace.el: * exwm.el: Use `exwm-workspace--minibuffer-own-frame-p' instead of the raw variable.
388 lines
17 KiB
EmacsLisp
388 lines
17 KiB
EmacsLisp
;;; exwm-systemtray.el --- System Tray Module for -*- lexical-binding: t -*-
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;;; EXWM
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;; Copyright (C) 2016 Free Software Foundation, Inc.
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;; Author: Chris Feng <chris.w.feng@gmail.com>
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This module adds system tray support for EXWM.
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;; To use this module, load and enable it as follows:
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;; (require 'exwm-systemtray)
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;; (exwm-systemtray-enable)
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;;; Code:
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(require 'xcb-xembed)
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(require 'xcb-systemtray)
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(require 'exwm-core)
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(defclass exwm-systemtray--icon ()
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((width :initarg :width)
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(height :initarg :height)
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(visible :initarg :visible))
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:documentation "Attributes of a system tray icon.")
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;; GTK icons require at least 16 pixels to show normally.
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(defconst exwm-systemtray--icon-min-size 16 "Minimum icon size.")
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(defvar exwm-systemtray-height nil "System tray height.
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You shall use the default value if using auto-hide minibuffer.")
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(defvar exwm-systemtray-icon-gap 2 "Gap between icons.")
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(defvar exwm-systemtray--connection nil "The X connection.")
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(defvar exwm-systemtray--list nil "The icon list.")
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(defvar exwm-systemtray--selection-owner-window nil
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"The selection owner window.")
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(defvar exwm-systemtray--embedder nil "The embedder window.")
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(defun exwm-systemtray--embed (icon)
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"Embed an icon."
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(exwm--log "(System Tray) Try to embed #x%x" icon)
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(let ((info (xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:xembed:get-_XEMBED_INFO
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:window icon)))
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width* height* visible)
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(when info
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(exwm--log "(System Tray) Embed #x%x" icon)
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(with-slots (width height)
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(xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:GetGeometry :drawable icon))
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(setq height* exwm-systemtray-height
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width* (round (* width (/ (float height*) height))))
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(when (< width* exwm-systemtray--icon-min-size)
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(setq width* exwm-systemtray--icon-min-size
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height* (round (* height (/ (float width*) width)))))
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(exwm--log "(System Tray) Resize from %dx%d to %dx%d"
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width height width* height*))
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;; Reparent to the embedder.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window icon
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:parent exwm-systemtray--embedder
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:x 0
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;; Vertically centered.
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:y (/ (- exwm-systemtray-height height*) 2)))
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;; Resize the icon.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window icon
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:value-mask (logior xcb:ConfigWindow:Width
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xcb:ConfigWindow:Height
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xcb:ConfigWindow:BorderWidth)
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:width width*
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:height height*
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:border-width 0))
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;; Set event mask.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window icon
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:value-mask xcb:CW:EventMask
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:event-mask (logior xcb:EventMask:ResizeRedirect
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xcb:EventMask:PropertyChange)))
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(setq visible (slot-value info 'flags))
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(if visible
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(setq visible
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(/= 0 (logand (slot-value info 'flags) xcb:xembed:MAPPED)))
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;; Default to visible.
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(setq visible t))
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(when visible
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(exwm--log "(System Tray) Map the window")
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:MapWindow :window icon)))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:xembed:SendEvent
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:destination icon
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:event
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(xcb:marshal
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(make-instance 'xcb:xembed:EMBEDDED-NOTIFY
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:window icon
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:time xcb:Time:CurrentTime
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:embedder exwm-systemtray--embedder
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:version 0)
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exwm-systemtray--connection)))
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(push `(,icon . ,(make-instance 'exwm-systemtray--icon
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:width width*
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:height height*
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:visible visible))
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exwm-systemtray--list)
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(exwm-systemtray--refresh))))
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(defun exwm-systemtray--unembed (icon)
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"Unembed an icon."
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(exwm--log "(System Tray) Unembed #x%x" icon)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:UnmapWindow :window icon))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window icon
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:parent exwm--root
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:x 0 :y 0))
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(setq exwm-systemtray--list
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(assq-delete-all icon exwm-systemtray--list))
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(exwm-systemtray--refresh))
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(defun exwm-systemtray--refresh ()
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"Refresh the system tray."
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;; Make sure to redraw the embedder.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:UnmapWindow :window exwm-systemtray--embedder))
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(let ((x exwm-systemtray-icon-gap)
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map)
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(dolist (pair exwm-systemtray--list)
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(when (slot-value (cdr pair) 'visible)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window (car pair)
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:value-mask xcb:ConfigWindow:X
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:x x))
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(setq x (+ x (slot-value (cdr pair) 'width)
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exwm-systemtray-icon-gap))
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(setq map t)))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window exwm-systemtray--embedder
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:value-mask (logior xcb:ConfigWindow:X
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xcb:ConfigWindow:Width)
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:x (- (exwm-workspace--current-width) x)
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:width x))
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(when map
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:MapWindow :window exwm-systemtray--embedder))))
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(xcb:flush exwm-systemtray--connection))
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(defun exwm-systemtray--on-DestroyNotify (data _synthetic)
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"Unembed icons on DestroyNotify."
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(let ((obj (make-instance 'xcb:DestroyNotify)))
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(xcb:unmarshal obj data)
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(with-slots (window) obj
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(when (assoc window exwm-systemtray--list)
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(exwm-systemtray--unembed window)))))
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(defun exwm-systemtray--on-ReparentNotify (data _synthetic)
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"Unembed icons on ReparentNotify."
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(let ((obj (make-instance 'xcb:ReparentNotify)))
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(xcb:unmarshal obj data)
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(with-slots (window parent) obj
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(when (and (/= parent exwm-systemtray--embedder)
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(assoc window exwm-systemtray--list))
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(exwm-systemtray--unembed window)))))
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(defun exwm-systemtray--on-ResizeRequest (data _synthetic)
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"Resize the tray icon on ResizeRequest."
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(let ((obj (make-instance 'xcb:ResizeRequest))
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attr)
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(xcb:unmarshal obj data)
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(with-slots (window width height) obj
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(when (setq attr (cdr (assoc window exwm-systemtray--list)))
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(with-slots ((width* width)
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(height* height))
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attr
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(setq height* exwm-systemtray-height
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width* (round (* width (/ (float height*) height))))
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(when (< width* exwm-systemtray--icon-min-size)
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(setq width* exwm-systemtray--icon-min-size
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height* (round (* height (/ (float width*) width)))))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window window
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:value-mask (logior xcb:ConfigWindow:Y
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xcb:ConfigWindow:Width
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xcb:ConfigWindow:Height)
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;; Vertically centered.
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:y (/ (- exwm-systemtray-height height*) 2)
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:width width*
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:height height*)))
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(exwm-systemtray--refresh)))))
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(defun exwm-systemtray--on-PropertyNotify (data _synthetic)
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"Map/Unmap the tray icon on PropertyNotify."
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(let ((obj (make-instance 'xcb:PropertyNotify))
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attr info visible)
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(xcb:unmarshal obj data)
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(with-slots (window atom state) obj
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(when (and (eq state xcb:Property:NewValue)
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(eq atom xcb:Atom:_XEMBED_INFO)
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(setq attr (cdr (assoc window exwm-systemtray--list))))
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(setq info (xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:xembed:get-_XEMBED_INFO
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:window window)))
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(when info
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(setq visible (/= 0 (logand (slot-value info 'flags)
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xcb:xembed:MAPPED)))
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(exwm--log "(System Tray) #x%x visible? %s" window visible)
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(if visible
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:MapWindow :window window))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:UnmapWindow :window window)))
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(setf (slot-value attr 'visible) visible)
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(exwm-systemtray--refresh))))))
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(defun exwm-systemtray--on-ClientMessage (data _synthetic)
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"Handle client messages."
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(let ((obj (make-instance 'xcb:ClientMessage))
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opcode data32)
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(xcb:unmarshal obj data)
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(with-slots (window type data) obj
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(when (eq type xcb:Atom:_NET_SYSTEM_TRAY_OPCODE)
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(setq data32 (slot-value data 'data32)
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opcode (elt data32 1))
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(cond ((= opcode xcb:systemtray:opcode:REQUEST-DOCK)
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(unless (assoc (elt data32 2) exwm-systemtray--list)
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(exwm-systemtray--embed (elt data32 2))))
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;; Not implemented (rarely used nowadays).
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((or (= opcode xcb:systemtray:opcode:BEGIN-MESSAGE)
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(= opcode xcb:systemtray:opcode:CANCEL-MESSAGE)))
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(t
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(exwm--log "(System Tray) Unknown opcode message: %s" obj)))))))
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(defvar exwm-workspace--current)
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(defun exwm-systemtray--on-workspace-switch ()
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"Reparent/Refresh the system tray in `exwm-workspace-switch-hook'."
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(unless (exwm-workspace--minibuffer-own-frame-p)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window exwm-systemtray--embedder
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:parent (string-to-number
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(frame-parameter exwm-workspace--current
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'window-id))
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:x 0
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:y (- (exwm-workspace--current-height)
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exwm-systemtray-height))))
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(exwm-systemtray--refresh))
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(defun exwm-systemtray--on-randr-refresh ()
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"Reposition/Refresh the system tray in `exwm-randr-refresh-hook'."
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(unless (exwm-workspace--minibuffer-own-frame-p)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ConfigureWindow
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:window exwm-systemtray--embedder
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:value-mask xcb:ConfigWindow:Y
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:y (- (exwm-workspace--current-height)
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exwm-systemtray-height))))
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(exwm-systemtray--refresh))
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(defvar xcb:Atom:_NET_SYSTEM_TRAY_S0)
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(defvar exwm-workspace--minibuffer)
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(defun exwm-systemtray--init ()
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"Initialize system tray module."
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(cl-assert (not exwm-systemtray--connection))
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(cl-assert (not exwm-systemtray--list))
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(cl-assert (not exwm-systemtray--selection-owner-window))
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(cl-assert (not exwm-systemtray--embedder))
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(unless exwm-systemtray-height
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(setq exwm-systemtray-height (max exwm-systemtray--icon-min-size
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(line-pixel-height))))
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;; Create a new connection.
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(setq exwm-systemtray--connection (xcb:connect-to-socket))
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(set-process-query-on-exit-flag (slot-value exwm-systemtray--connection
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'process)
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nil)
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;; Initialize XELB modules.
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(xcb:xembed:init exwm-systemtray--connection)
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(xcb:systemtray:init exwm-systemtray--connection)
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;; Acquire the manager selection _NET_SYSTEM_TRAY_S0.
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(with-slots (owner)
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(xcb:+request-unchecked+reply exwm-systemtray--connection
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(make-instance 'xcb:GetSelectionOwner
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:selection xcb:Atom:_NET_SYSTEM_TRAY_S0))
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(when (/= owner xcb:Window:None)
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(error "[EXWM] Other system tray detected")))
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(let ((id (xcb:generate-id exwm-systemtray--connection)))
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(setq exwm-systemtray--selection-owner-window id)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:CreateWindow
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:depth 0 :wid id :parent exwm--root
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:x 0 :y 0 :width 1 :height 1
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:border-width 0 :class xcb:WindowClass:InputOnly
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:visual 0 :value-mask xcb:CW:OverrideRedirect
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:override-redirect 1))
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;; Get the selection ownership.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:SetSelectionOwner
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:owner id
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:selection xcb:Atom:_NET_SYSTEM_TRAY_S0
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:time xcb:Time:CurrentTime))
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;; Set _NET_WM_NAME.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ewmh:set-_NET_WM_NAME
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:window id :data "EXWM system tray selection owner"))
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;; Set the _NET_SYSTEM_TRAY_ORIENTATION property.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:xembed:set-_NET_SYSTEM_TRAY_ORIENTATION
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:window id
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:data xcb:systemtray:ORIENTATION:HORZ)))
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;; Create the embedder.
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(let ((id (xcb:generate-id exwm-systemtray--connection))
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parent y)
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(setq exwm-systemtray--embedder id)
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:CreateWindow
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:depth 0 :wid id :parent exwm--root
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:x 0 :y 0 :width 1 :height exwm-systemtray-height
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:border-width 0 :class xcb:WindowClass:CopyFromParent
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:visual 0 :value-mask xcb:CW:EventMask
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:event-mask xcb:EventMask:SubstructureNotify))
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(if (exwm-workspace--minibuffer-own-frame-p)
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(setq parent (frame-parameter exwm-workspace--minibuffer
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'exwm-container)
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;; Vertically centered.
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y (/ (- (line-pixel-height) exwm-systemtray-height) 2))
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(setq parent (string-to-number (frame-parameter exwm-workspace--current
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'window-id))
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;; Bottom aligned.
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y (- (exwm-workspace--current-height) exwm-systemtray-height)))
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ReparentWindow
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:window id :parent parent :x 0 :y y))
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;; Set _NET_WM_NAME.
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(xcb:+request exwm-systemtray--connection
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(make-instance 'xcb:ewmh:set-_NET_WM_NAME
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:window id :data "EXWM system tray embedder")))
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(xcb:flush exwm-systemtray--connection)
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;; Attach event listeners.
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(xcb:+event exwm-systemtray--connection 'xcb:DestroyNotify
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#'exwm-systemtray--on-DestroyNotify)
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(xcb:+event exwm-systemtray--connection 'xcb:ReparentNotify
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#'exwm-systemtray--on-ReparentNotify)
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(xcb:+event exwm-systemtray--connection 'xcb:ResizeRequest
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#'exwm-systemtray--on-ResizeRequest)
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(xcb:+event exwm-systemtray--connection 'xcb:PropertyNotify
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#'exwm-systemtray--on-PropertyNotify)
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(xcb:+event exwm-systemtray--connection 'xcb:ClientMessage
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#'exwm-systemtray--on-ClientMessage)
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;; Add hook to move/reparent the embedder.
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(add-hook 'exwm-workspace-switch-hook #'exwm-systemtray--on-workspace-switch)
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(add-hook 'exwm-randr-refresh-hook #'exwm-systemtray--on-randr-refresh))
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(defun exwm-systemtray-enable ()
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"Enable system tray support for EXWM."
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(add-hook 'exwm-init-hook #'exwm-systemtray--init))
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(provide 'exwm-systemtray)
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;; exwm-systemtray.el ends here
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