35e7b8a1a8
This contains a bunch of upstream changes after the new maintainers of
EXWM took over, including proper mainlined versions of patches I've
been carrying around here manually.
Notably this undoes the Chromium focus fix patch, lets see how that goes.
git-subtree-dir: third_party/exwm
git-subtree-mainline: a756b46bc70a8a1dbb205d50283a3fe65282ed91
git-subtree-split: a6e66f5e33
Change-Id: Ibcaba379b56611b8f1918c3b60469492d64a3eb7
199 lines
7.7 KiB
EmacsLisp
199 lines
7.7 KiB
EmacsLisp
;;; exwm-background.el --- X Background Module for EXWM -*- lexical-binding: t -*-
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;; Copyright (C) 2022-2024 Free Software Foundation, Inc.
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;; Author: Steven Allen <steven@stebalien.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 X background color setting support to EXWM.
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;; To use this module, load and enable it as follows:
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;; (require 'exwm-background)
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;; (exwm-background-enable)
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;;
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;; By default, this will apply the theme's background color. However, that
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;; color can be customized via the `exwm-background-color' setting.
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;;; Code:
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(require 'exwm-core)
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(defcustom exwm-background-color nil
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"Background color for Xorg."
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:type '(choice
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(color :tag "Background Color")
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(const :tag "Default" nil))
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:group 'exwm
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:initialize #'custom-initialize-default
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:set (lambda (symbol value)
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(set-default-toplevel-value symbol value)
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(exwm-background--update)))
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(defconst exwm-background--properties '("_XROOTPMAP_ID" "_XSETROOT_ID" "ESETROOT_PMAP_ID")
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"The background properties to set.
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We can't need to set these so that compositing window managers
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can correctly display the background color.")
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(defvar exwm-background--connection nil
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"The X connection used for setting the background.
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We use a separate connection as other background-setting tools
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may kill this connection when they replace it.")
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(defvar exwm-background--pixmap nil
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"Cached background pixmap.")
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(defvar exwm-background--atoms nil
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"Cached background atoms.")
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(defun exwm-background--update (&rest _)
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"Update the EXWM background."
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;; Always reconnect as any tool that sets the background may have disconnected us (to force X to
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;; free resources).
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(exwm-background--connect)
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(let ((gc (xcb:generate-id exwm-background--connection))
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(color (exwm--color->pixel (or exwm-background-color
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(face-background 'default)))))
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;; Fill the pixmap.
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(xcb:+request exwm-background--connection
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(make-instance 'xcb:CreateGC
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:cid gc :drawable exwm-background--pixmap
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:value-mask (logior xcb:GC:Foreground
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xcb:GC:GraphicsExposures)
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:foreground color
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:graphics-exposures 0))
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(xcb:+request exwm-background--connection
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(make-instance 'xcb:PolyFillRectangle
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:gc gc :drawable exwm-background--pixmap
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:rectangles
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(list
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(make-instance
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'xcb:RECTANGLE
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:x 0 :y 0 :width 1 :height 1))))
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(xcb:+request exwm-background--connection (make-instance 'xcb:FreeGC :gc gc)))
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;; Reapply it to force an update (also clobber anyone else who may have set it).
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(xcb:+request exwm-background--connection
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(make-instance 'xcb:ChangeWindowAttributes
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:window exwm--root
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:value-mask xcb:CW:BackPixmap
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:background-pixmap exwm-background--pixmap))
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(let (old)
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;; Collect old pixmaps so we can kill other background clients (all the background setting tools
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;; seem to do this).
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(dolist (atom exwm-background--atoms)
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(when-let* ((reply (xcb:+request-unchecked+reply exwm-background--connection
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(make-instance 'xcb:GetProperty
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:delete 0
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:window exwm--root
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:property atom
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:type xcb:Atom:PIXMAP
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:long-offset 0
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:long-length 1)))
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(value (vconcat (slot-value reply 'value)))
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((length= value 4))
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(pixmap (funcall (if xcb:lsb #'xcb:-unpack-u4-lsb #'xcb:-unpack-u4)
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value 0))
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((not (or (= pixmap exwm-background--pixmap)
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(member pixmap old)))))
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(push pixmap old)))
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;; Change the background.
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(dolist (atom exwm-background--atoms)
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(xcb:+request exwm-background--connection
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(make-instance 'xcb:ChangeProperty
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:window exwm--root
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:property atom
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:type xcb:Atom:PIXMAP
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:format 32
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:mode xcb:PropMode:Replace
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:data-len 1
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:data
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(funcall (if xcb:lsb
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#'xcb:-pack-u4-lsb
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#'xcb:-pack-u4)
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exwm-background--pixmap))))
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;; Kill the old background clients.
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(dolist (pixmap old)
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(xcb:+request exwm-background--connection
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(make-instance 'xcb:KillClient :resource pixmap))))
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(xcb:flush exwm-background--connection))
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(defun exwm-background--connected-p ()
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(and exwm-background--connection
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(process-live-p (slot-value exwm-background--connection 'process))))
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(defun exwm-background--connect ()
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(unless (exwm-background--connected-p)
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(setq exwm-background--connection (xcb:connect))
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;;prevent query message on exit
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(set-process-query-on-exit-flag (slot-value exwm-background--connection 'process) nil)
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;; Intern the background property atoms.
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(setq exwm-background--atoms
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(mapcar
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(lambda (prop) (exwm--intern-atom prop exwm-background--connection))
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exwm-background--properties))
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;; Create the pixmap.
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(setq exwm-background--pixmap (xcb:generate-id exwm-background--connection))
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(xcb:+request exwm-background--connection
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(make-instance 'xcb:CreatePixmap
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:depth
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(slot-value
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(xcb:+request-unchecked+reply exwm-background--connection
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(make-instance 'xcb:GetGeometry :drawable exwm--root))
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'depth)
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:pid exwm-background--pixmap
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:drawable exwm--root
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:width 1 :height 1))))
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(defun exwm-background--init ()
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"Initialize background module."
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(exwm--log)
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(add-hook 'enable-theme-functions 'exwm-background--update)
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(add-hook 'disable-theme-functions 'exwm-background--update)
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(exwm-background--update))
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(defun exwm-background--exit ()
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"Uninitialize the background module."
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(exwm--log)
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(remove-hook 'enable-theme-functions 'exwm-background--update)
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(remove-hook 'disable-theme-functions 'exwm-background--update)
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(when (and exwm-background--connection
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(slot-value exwm-background--connection 'connected))
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(xcb:disconnect exwm-background--connection))
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(setq exwm-background--pixmap nil
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exwm-background--connection nil
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exwm-background--atoms nil))
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(defun exwm-background-enable ()
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"Enable background support for EXWM."
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(exwm--log)
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(add-hook 'exwm-init-hook #'exwm-background--init)
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(add-hook 'exwm-exit-hook #'exwm-background--exit))
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(provide 'exwm-background)
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;;; exwm-background.el ends here
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